Plans numbered from 100-599 describe physical parts of the signaling system.
Plans in the 600 series plans are keys to reading other plans and interlocking diagrams
Plans in the 800 series plans document the electrical operation of the signaling system.
Thank you to Pat McKinney for loaning me his standards book to scan! Also thank you to Robert Fredland for photocopying his 8xx series plan book and C.E. 234!
A related documents is: C.E. 234-b, "Specifications for Signal and Interlocking Systems" which refers to and has links to many of these plans.
Note that some of these plan files are fairly large and may take a while to download.
Note that these files require Adobe's Acrobat Reader. It's free, just go to http://www.acrobat.com to download it.
Sorted ascending by Source
| Plan # | Revision | Title | Rev date | Railroad | C of | |
| S-427 | needed | Signal Supports for Catenary Poles | 1/1/1900 | - | - | |
| S-425 | needed | Signal Supports for Bridge | 1/1/1900 | - | - | |
| S-117 | needed | Instrument Case | 1/1/1900 | - | - | |
| S-800 | needed | Dimensions of Signal Circuit Plans | 1/1/1900 | - | - | |
| S-170 | A | Leadout Foundation parts- for Rocker Shaft Leadout | 4/29/1921 | PS | PM |
| S-232 | C | Locking for Non-Interlocked Turnouts Equipped with Derail | 1/25/1950 | PRR | PM |
| S-176 | B | Layout for Type AZ Impedance Bonds | 5/31/1938 | PRR | PM |
| S-176 | C | Layout for Type AZ Impedance Bonds | 4/25/1942 | PRR | PM |
| S-177 | B | Layout for Type AZ Impedance Bonds (for Trial Installations) | 8/10/1942 | PRR | PM |
| S-178 | A | Rail Bond Clips | 2/17/1947 | PRR | PM |
| S-233 | B | Arrangement for Locking Non-Interlocked Turnout Protected By Signal | 10/9/1925 | PRR | PM |
| S-234 | A | Arrangement for Locking Non-Interlocked Crossover Protected by Signal | 9/11/1924 | PRRS | PM |
| S-179 | K | Rail Bonds and Connectors (Sheet 2/2) | 11/4/1937 | PRR | PM |
| S-179 | L | Rail Bonds and Connectors (Sheet 1/2) | 11/12/1946 | PRR | PM |
| S-179 | M | Rail Bonds and Connectors | 12/28/1948 | PRR | PM |
| S-180 | C | Rail Bond, Rail Head Type | 8/25/1942 | PRR | PM |
| S-235 | A | Arrangement for Locking Non-Interlocked Crossover Protected by Signal | 9/11/1924 | PRRS | PM |
| S-236 | C | Lever and Stand | 12/15/1926 | PRR | PM |
| S-184 | J | Track Circuit Connections, Parkway Cable | 12/27/1951 | PRR | PM |
| S-237 | C | Lever and Stand | 10/25/1946 | PRR | PM |
| S-241 | F | Dragging Equipment Detector | 3/4/1939 | PRR | PM |
| S-195 | A | Switch Ties for Interlocking Single Switches | 12/4/1947 | PRR | PM |
| S-195 | B | Switch Ties for Interlocking Single Switches | 5/26/1948 | PRR | PM |
| S-200 | C | Layout, Single Switch, Type "G" Mechanism | 2/16/1926 | PRR | PM |
| S-241 | J | Dragging Equipment Detector | 6/5/1942 | PRR | PM |
| S-201 | C | Layout, Single Switch, Type "G" Mechanism | 4/16/1926 | PRR | PM |
| S-202 | B | Layout, Double Slip Switch Type "Q" Mechanism | 12/3/1926 | PRRS | PM |
| S-203 | A | Layout, M.P. Frogs Type "G" Mechanism | 5/12/1924 | PRRS | PM |
| S-206 | A | Layouts for Derails, Type "G" Mechanism | 5/31/1922 | PS | PM |
| S-207 | A | Layouts for Derails, Type "A1" Mechanism | 6/8/1923 | PRRS | PM |
| S-241 | K | Dragging Equipment Detector, Parts and Details | 8/20/1947 | PRR | PM |
| S-210 | F | Layout, Single Switch, Type "A-5" Mechanism | 7/20/1934 | PRR | PM |
| S-211 | B | Layout, Single Switch,Type "A-1" Mechanism | 10/28/1926 | PRR | PM |
| S-212 | A | Layout, Slip Switch,"A1" Mechanism without Cylinder | 11/22/1927 | PRR | PM |
| S-213 | A | Layout, M.P. Frogs, Type "A1" Mechanism | 11/22/1927 | PRR | PM |
| S-214 | A | Layout, Slip Switch, "A1" Mechanism with Cylinder | 11/22/1927 | PRR | PM |
| S-216 | B | Layout, Single Switch, Style "M-2" & "M-20" Mechanisms | 5/7/1929 | PRR | PM |
| S-217 | A | Layout, Single Switch, Style "M" Mechanism | 7/5/1927 | PRR | PM |
| S-220 | D | Switch Circuit Controller Connection | 2/21/1927 | PRR | PM |
| S-250 | A | Electric Switch Heaters, Active Element 24 feet or less in Length, A.C. Operation | 12/19/1950 | PRR | PM |
| S-221 | C | Switch Circuit Controller | 9/17/1935 | PRR | PM |
| S-222 | A | Layout, 45 ft. Split Switch, Electo-Pneumatic or Mechanical Operation | 9/30/1946 | PRR | PM |
| S-224 | A | Mounting of T-20 H.O. Mechanism and SL-26 Electric Switch Lock | 2/21/1949 | PRR | PM |
| S-100 | B | Cranks and Stand, One Way Horizontal | 1/19/1928 | PRR | PM |
| S-101 | B | Cranks and Stand, Two Way Horizontal | 1/19/1928 | PRR | PM |
| S-107 | A | Crank and Stands, One and Two Way Vertical | 6/8/1920 | PS | PM |
| S-108 | A | Platforms for Instrument Cases | 6/7/1951 | PRR | PM |
| S-109 | A | Foundation, Precast Concrete for Instrument Cases | 4/30/1947 | PRR | PM |
| S-109 | B | Foundation, Precast Concrete for Instrument Cases | 4/10/1951 | PRR | PM |
| S-110 | B | Foundation, Cast Iron for Instrument Cases | 4/10/1947 | PRR | PM |
| S-110 | C | Foundation, Cast Iron for Instrument Cases | 4/11/1951 | PRR | PM |
| S-111 | B | Foundations, Angle Iron for Instrument Cases | 2/24/1947 | PRR | PM |
| S-111 | C | Foundations, Angle Iron for Instrument Cases | 4/9/1951 | PRR | PM |
| S-112 | B | Pipe Compensator, One-Way Horizontal | 2/9/1923 | PRR | PM |
| S-114 | D | Foundations, Air Line | 4/24/1943 | PRR | PM |
| S-255 | A | Plunger Lock and Circuit Controller | 2/11/1922 | PS | PM |
| S-115 | C | Foundations, Pipe Carriers and Instrument Cases | 7/11/1934 | PRR | PM |
| S-256 | A | Plunger Lock | 12/14/1921 | PS | PM |
| S-116 | D | Foundations for Compensators and Cranks | 7/11/1934 | PRR | PM |
| S-229 | C | Arrangement for Locking Non-Interlocked Crossover | 12/30/1932 | PRR | PM |
| S-118 | B | Screw and Solid Jaws | 5/20/1940 | PRR | PM |
| S-265 | A | Duplex switch lock | 8/2/1920 | PS | PM |
| S-121 | B | Jaws, Lugs, and Links | 12/30/1948 | PRR | PM |
| S-121 | C | Jaws, Lugs, and Links | 4/17/1951 | PRR | PM |
| S-122 | A | Pipe adjusting Screw | 8/4/1920 | PS | PM |
| S-124 | A | Pipe Line Insulation, One Inch Signal Pipe | 5/20/1940 | PRR | PM |
| S-125 | C | Stuffing Box for 1" pipe | 2/9/1928 | PRR | PM |
| S-130 | B | Expansion Joint and Flange Union | 8/2/1922 | PS | PM |
| S-230 | C | Arrangement for Locking Non-Interlocked Crossover Protected by Signal | 12/30/1932 | PRR | PM |
| S-136 | B | Pipe for Signals and Interlocking | 10/18/1926 | PRR | PM |
| S-258 | D | Switch Mechanism, Type "G" | 12/23/1926 | PRR | PM |
| S-138 | D | Pipe Carrier Parts | 5/22/1930 | PRR | PM |
| S-139 | A | Pipe Carrier Parts | 5/24/1920 | PS | PM |
| S-231 | C | Arrangement for Locking Non-Interlocked Crossover Protected by Signal | 12/30/1932 | PRR | PM |
| S-140 | C | Pipe Carriers | 5/22/1930 | PRR | PM |
| S-260 | A | Switch Mechanism, Hand Operated | 10/26/1926 | PRR | PM |
| S-150 | B | Down Rod for Electro-Mechanical Interlocking Machines | 3/15/1926 | PRR | PM |
| S-153 | A | Bearings and parts- Rocker Shaft | 9/2/1921 | PS | PM |
| S-154 | A | Rocker Shaft and arms | 9/2/1921 | PS | PM |
| S-160 | A | Deflecting Bars and Stand-Horizontal adjustable | 6/4/1920 | PS | PM |
| S-305 | G | Front and Lock Rods for Single Switches | 10/11/1932 | PRR | PM |
| S-307 | A | Front and Lock Rods for Slip Switches 131 LB. R.E. and 152 LB. P.S. Rail | 8/12/1935 | PRR | PM |
| S-308 | B | Front and Lock Rods for Slip Switches 100 LB. P.S. and 130 LB. P.S. Rail | 8/17/1935 | PRR | PM |
| S-309 | C | Front and Lock Rods for Movable Point Frogs 100 LB. P.S. and 130 LB. P.S. Rail | 3/23/1935 | PRR | PM |
| S-310 | A | Front and Lock Rods for Movable Point Frogs 131 LB. R.E. and 152 LB. P.S. Rail | 3/30/1935 | PRR | PM |
| S-311 | F | Lock Rods | 3/20/1929 | PRR | PM |
| S-311 | G | Lock Rods | 5/10/1945 | PRR | PM |
| S-321 | H | Front Rod Parts | 3/6/1936 | PRR | PM |
| S-323 | H | Front Rod Parts for Slip Switches 100LB. P.S. and 130 LB. P.S. Rail | 8/27/1935 | PRR | PM |
| S-324 | A | Front Rod Parts for Slip Switches 131LB. R.E. and 152LB. P.S. Rail | 7/10/1935 | PRR | PM |
| S-325 | C | Front Rod Parts for Movable Point Switches | 2/20/1935 | PRR | PM |
| S-331 | I | Operating Rods for Single Switches | 9/5/1946 | PRR | PM |
| S-333 | C | Operating Rods for Double Slip Switches | 12/6/1937 | PRR | PM |
| S-335 | C | Operating Rods for M.P. Frogs | 12/6/1937 | PRR | PM |
| S-371 | A | Drawbridge Locking for Center Pivot Draw | 5/23/1932 | PRR | PM |
| S-372 | D | Drawbridge Locking for Center Pivot Draw | 12/30/1948 | PRR | PM |
| S-375 | B | Drawbridge Locking for Lift Draw | 5/6/1935 | PRR | PM |
| S-380 | A | Smashboards | 7/23/1936 | PRR | PM |
| S-400 | E | Signals, Position Light | 11/10/1927 | PRR | PM |
| S-400 | F | Position Light Signal | 2/12/1952 | PRR | PM |
| S-400 | G | Position Light Signals | 6/18/1953 | PRR | PM |
| S-401 | E | Position Light Signal Parts | 3/29/1939 | PRR | PM |
| S-401 | F | Position Light Signal Parts | 2/12/1952 | PRR | PM |
| S-403 | B | Ladder Parts for Position Light Signals | 2/17/1927 | PRR | PM |
| S-404 | B | Ladders for Position Light Signals | 2/17/1927 | PRR | PM |
| S-405 | A | Signals, Position Light | 8/31/1925 | PRRS | PM |
| S-406 | A | Signals, Position Light | 5/14/1926 | PRR | PM |
| S-407 | A | Ladder and Masts for Position Light Signals | 12/6/1926 | PRR | PM |
| S-408 | B | Instrument Cases and Bases for Signal Masts | 9/21/1927 | PRR | PM |
| S-410 | D | Signals, Position Light | 2/13/1934 | PRR | PM |
| S-433 | A | Arrangement of Decking Railing and Conduit on Signal Bridges | 5/22/1928 | PRR | PM |
| S-452 | A | Take Siding Indicator for Placing on Block Stations | 11/18/1927 | PRR | PM |
| S-454 | B | Train Order Signals | 2/18/1924 | PS | PM |
| S-457 | C | Signal, Color Light Flag Station | 2/23/1927 | PRRS | PM |
| S-462 | A | Layout for Automatic Highway Crossing Gates | 9/30/1947 | PRR | PM |
| S-463 | D | Signal, Highway Crossing | 4/8/1931 | PRR | PM |
| S-463 | E | Signal, Flashing Light Highway Crossing | 2/26/1952 | PRR | PM |
| S-464 | C | Block-Limit Signal and Approach Block-Limit Sign | 6/18/1943 | PRR | PM |
| S-464 | G | Block-Limit Signal and Approach Block-Limit Signal | 4/23/1948 | PRR | PM |
| S-465 | B | Signs, Illuminated and Reflecting for Highway Crossings | 10/31/1933 | PRR | PM |
| S-466 | A | Signs, Details of Reflector Signs for Highway Crossings | 10/31/1933 | PRR | PM |
| S-467 | A | Specifications for Reflector Signs and Reflector Units | 10/31/1933 | PRR | PM |
| S-468 | B | Markers | 8/25/1944 | PRR | PM |
| S-469 | B | Signs, Illuminated | 8/9/1949 | PRR | PM |
| S-470 | A | Distant switch indicator | 2/25/1929 | PRR | PM |
| S-472 | A | Signs, End of Block and Fouling Point | 9/27/1949 | PRR | PM |
| S-473 | A | Signal, Color Light Scale | 1/5/1921 | PS | PM |
| S-477 | B | Lamp, Oil Lighted Signal | 10/12/1923 | PRRS | PM |
| S-478 | C | Electric Lamp for semaphore signals | 9/7/1926 | PRR | PM |
| S-479 | C | Lamps | 1/29/1925 | PRRS | PM |
| S-480 | C | Lamp for Flag Station and Unattended Block Station Signals | 7/25/1924 | PRRS | PM |
| S-481 | A | Electric Lamp Parts | 9/7/1926 | PRR | PM |
| S-482 | B | Lamp Details for Oil Lighted Switch and Signal Lamps | 1/7/1926 | PRR | PM |
| S-482 | C | Lamp Details for Oil Lighted Switch and Signal Lamps | 6/23/1937 | PRR | PM |
| S-483 | C | Incandescent Electric Lamps | 11/8/1926 | PRR | PM |
| S-483 | E | Incandescent Electric Lamps | 12/4/1945 | PRR | PM |
| S-484 | C | Blades for Semaphore Signals | 6/2/1924 | PRRS | PM |
| S-484 | D | Blades for Semaphore Signals | 5/9/1949 | PRR | PM |
| S-486 | B | Cover Glasses and Lenses for Position and other Light Signals | 3/6/1924 | PS | PM |
| S-486 | C | Cover Glasses and Lenses for Position and other Light Signals | 2/27/1929 | PRR | PM |
| S-486 | D | Cover Glasses and Lenses for Position and other Light Signals | 2/5/1934 | PRR | PM |
| S-487 | C | Roundels & Lenses, for semaphore signals | 2/8/1927 | PRR | PM |
| S-487 | E | Roundels & Lenses | 7/24/1937 | PRR | PM |
| S-489 | G | Numerals and Letters, Enameled, for Signal Numbering | 1/23/1944 | PRR | PM |
| S-490 | A | Numerals and Letters for Signal Numbering | 5/2/1927 | PRR | PM |
| S-490 | B | Numerals & Letters, Cast Iron, for Signal Numbering | 11/27/1942 | PRR | PM |
| S-490 | C | Numerals and Letters, Enameled, for Signal Numbering | 4/25/1947 | PRR | PM |
| S-496 | C | Foundations, Precast Concrete, for Position Light Signals | 4/29/1943 | PRR | PM |
| S-496 | D | Foundations, Precast Concrete, for Position Light Signals | 6/26/1944 | PRR | PM |
| S-497 | C | Foundations, for Position Light Signals and Instrument Cases | 1/26/1927 | PRR | PM |
| S-497 | E | Foundations, for Position Light Signals and Instrument Cases | 7/20/1934 | PRR | PM |
| S-498 | A | Foundations, Precast Concrete | 9/14/1948 | PRR | PM |
| S-498 | B | Foundations, Precast Concrete | 3/9/1953 | PRR | PM |
| S-508 | A | Battery Well | 3/6/1922 | PS | PM |
| S-509 | A | Battery well and box | 9/2/1921 | PS | PM |
| S-509 | B | Battery Well | 6/12/1936 | PS | PM |
| S-510 | B | Battery Box | 6/10/1936 | PRR | PM |
| S-511 | A | Battery boxes | 6/23/1924 | PRRS | PM |
| S-513 | B | Terminal Blocks | 10/21/1924 | PS | PM |
| S-513 | F | Terminal Blocks | 5/14/1940 | PRR | PM |
| S-521 | A | Switch Wedges | 7/10/1935 | PRR | PM |
| S-522 | B | Blocking Devices for Interlocking Machine Levers | 9/22/1922 | PS | PM |
| S-522 | C | Blocking Devices for Interlocking Machine Levers | 7/6/1928 | PRR | PM |
| S-522 | F | Blocking Devices for Interlocking Machine Levers | 1/10/1935 | PRR | PM |
| S-528 | J | Eyelets, Tags & Connectors | 5/17/1950 | PRR | PM |
| S-528 | K | Eyelets, Tags & Connectors | 7/31/1952 | PRR | PM |
| S-529 | A | Tags, Printed Plastic | 7/31/1952 | PRR | PM |
| S-530 | E | Instrument Case | 1/10/1928 | PRR | PM |
| S-530 | F | Instrument Case | 1/23/1933 | PRR | PM |
| S-530 | H | Instrument Cases | 3/4/1946 | PRR | PM |
| S-531 | C | Instrument Case | 4/12/1924 | PS | PM |
| S-532 | G | Instrument Cases | 7/6/1934 | PRR | PM |
| S-537 | A | Sectionalizing Case and Foundation | 6/14/1922 | PS | PM |
| S-538 | E | Instrument Houses, Steel Insulated | 4/28/1948 | PRR | PM |
| S-540 | C | Instrument Racks for Interlocking Stations | 1/13/1938 | PRR | PM |
| S-545 | F | Markers for Switches and Signals | 7/31/1935 | PRR | PM |
| S-545 | G | Markers for Grade Signal and Spring Switch | 7/8/1942 | PRR | PM |
| S-546 | C | Cable Marker for Underground Cables | 4/14/1948 | PRR | PM |
| S-548 | A | Locking and Sealing Devices | 6/20/1927 | PRR | PM |
| S-550 | A | Anchor and Boxes for Air Line | 2/7/1923 | PRRS | PM |
| S-555 | B | Atmospheric Aftercooler and Drip Feed | 6/20/1927 | PRR | PM |
| S-555 | D | Atmospheric Aftercooler and Drip Feed | 9/15/1937 | PRR | PM |
| S-580 | A | Tools and Gauge | 4/27/1923 | PRRS | PM |
| S-167 | A | Leadout foundation Rocker Shaft | 4/29/1921 | PS | PM |
| SK-12 | B | Locking and Sealing Device for Electric Lock | 11/17/1924 | PRRS | PM |
| S-601 | A | Symbols | 4/12/1947 | PRR | RF |
| S-801 | _ | Track Circuit Designations | 4/15/1947 | PRR | RF |
| S-802 | _ | Designation of Instruments and Apparatus Indicated on Signal Circuit Plans | 10/3/1949 | PRR | RF |
| S-803 | _ | Bonding and Insulation of Switches | 12/29/1948 | PRR | RF |
| S-804 | _ | D.C. Neutral Track Circuits USing Style DN-22BH Relays | 2/9/1959 | PRR | RF |
| S-805 | _ | Arrangement for Lighting Position Light Signals when Normal Power Fails | 7/14/1952 | PRR | RF |
| S-806 | _ | Contact Arrangement of Alternating Current Relays | 6/7/1926 | PRR | RF |
| S-807 | _ | Protection of Oil Sidings from Electric Sparks | 6/22/1945 | PRR | RF |
| S-809 | _ | Track Circuit Polarity | 4/30/1929 | PRR | RF |
| S-810 | _ | Ground Detector Wiring Diagram | 5/8/1948 | PRR | RF |
| S-811 | _ | 110 Volt A.C. Power Supply for Interlockings | 3/22/1937 | PRR | RF |
| S-812 | _ | Control Circuits for D.C. Slow Acting Relays | 8/3/1928 | PRR | RF |
| S-813 | _ | Lightning Protection for Signal Circuits in Steam Territory | 8/7/1947 | PRR | RF |
| S-814 | _ | Protection of Fueling Locations from Electric Sparks | 3/12/1958 | PRR | RF |
| S-816 | _ | Application of Centrifugal Track Relays on Double Rail Track Circuit | 5/18/1950 | PRR | RF |
| S-817 | _ | Method of Measuring Resistance of Made Ground | 7/17/1937 | PRR | RF |
| S-818 | _ | Track Insulation Tests | 1/12/1938 | PRR | RF |
| S-819 | _ | Trap Circuits | 3/23/1937 | PRR | RF |
| S-820 | _ | Circuits for Lever Repeating Relays | 5/12/1931 | PRR | RF |
| S-821 | _ | Circuits for Electro-Mechanical Switches | 5/7/1924 | PRR | RF |
| S-822 | _ | Circuits for Electro-Pneumatic Switches | 5/24/1950 | PRR | RF |
| S-823 | _ | Circuits for Electric Switches | 3/1/1937 | PRR | RF |
| S-824 | _ | Segments | 12/14/1929 | PRR | RF |
| S-825 | _ | Route Locking Circuits | 9/20/1927 | PRR | RF |
| S-826 | _ | Circuits for Remote Control of Outlaying Switch | 5/23/1932 | PRR | RF |
| S-827 | _ | Control Circuits for Remote Control of Manual Block Signal | 12/21/1933 | PRR | RF |
| S-830 | _ | Control Circuits for Flashing Light Train Order Signal | 4/25/1950 | PRR | RF |
| S-831 | _ | Circuits for Color Light Scale Signals, Flag Station Signal & Distant Switch Indicator | 7/14/1952 | PRR | RF |
| S-835 | _ | Circuits for Automatic Gauntlet Signals | 10/1/1935 | PRR | RF |
| S-840 | _ | Draw Bridge Circuits | 3/8/1928 | PRR | RF |
| S-841 | _ | Control Circuits for Torpedo Placing Machine | 1/28/1936 | PRR | RF |
| S-844 | _ | Circuits for Automatic Interlocking at Railroad Grade Crossings | 11/4/1948 | PRR | RF |
| S-845 | _ | Circuits for Absolute Permissive Block Signal System | 8/10/1931 | PRR | RF |
| S-847 | _ | Control Circuits for 110 V.A.C. "T2" Motor Signals | 12/14/1926 | PRR | RF |
| S-851 | _ | Home Signal Control Circuits Between Machine and Signals | 8/10/1932 | PRR | RF |
| S-852 | _ | SS Protection | 2/25/1953 | PRR | RF |
| S-853 | _ | Control Circuits for Clear Control of Distant Signals | 2/21/1933 | PRR | RF |
| S-854 | _ | Typical Control Circuits for Block Signals | 4/22/1944 | PRR | RF |
| S-855 | _ | Lighting Circuits for Position Light Home Interlocking and Block Signals | 1/12/1959 | PRR | RF |
| S-856 | _ | Lighting Circuits for Position Light Distant Signals | 3/12/1933 | PRR | RF |
| S-857 | _ | Circuits for Position Light Automatic Signals | 10/10/1932 | PRR | RF |
| S-858 | _ | Arrangement of Terminals in Terminal Box of Position Light Signals | 1/26/1959 | PRR | RF |
| S-859 | _ | Circuits for Interlocking Operated Part Time | 11/30/1935 | PRR | RF |
| S-860 | _ | Circuits for Automatic Highway Crossing Signals and Gates | 7/14/1952 | PRR | RF |
| S-861 | _ | Control Circuits for Track Indicating Relays | 2/25/1953 | PRR | RF |
| S-862 | _ | Control Circuits for Interlocking Signals | 8/27/1953 | PRR | RF |
| S-863 | _ | Local Circuits for Motor Interlocking & Block Signals | 5/19/1927 | PRR | RF |
| S-864 | _ | Local Circuits for Motor Distant Signals | 5/19/1927 | PRR | RF |
| S-865 | _ | Approach Lighting Circuits | 5/11/1937 | PRR | RF |
| S-866 | _ | Lighting Circuits for Lamps on Crossing Gates | 4/10/1944 | PRR | RF |
| S-867 | _ | Control Circuits for Position Light Dwarf Signals | 9/30/1927 | PRR | RF |
| S-870 | _ | Time Locking and Approach Locking Circuits | 8/27/1953 | PRR | RF |
| S-871 | _ | Control Circuits for Controlled Manual Block | 12/30/1926 | PRR | RF |
| S-872 | _ | Control Circuits for Electric Switch Locks on Non-Interlocked Switches | 11/3/1942 | PRR | RF |
| S-873 | _ | Circuits for Check Locking Between Adjacent Interlocking Stations with Panel Type Blocking Device | 1/24/1947 | PRR | RF |
| S-879 | _ | Circuits for Dragging Equipment Detectors | 6/10/1959 | PRR | RF |
| S-881 | _ | Coded Track Circuits for Interlockings | 7/31/1943 | PRR | RF |
| S-883 | _ | Coded Track Circuits Approaching Distant Interlocking Signals | 3/26/2027 | PRR | RF |
| S-884 | _ | Coded Track Circuits in Automatic Territory | 9/2/1936 | PRR | RF |
| S-887 | _ | Coded Track Citcuits Approaching Home Interlocking Signal | 1/17/1944 | PRR | RF |
| S-888 | _ | Coded Crcuits Superimposed on D.C.Track Circuits | 4/26/1928 | PRR | RF |
| S-889 | _ | Code Change Point Approaching Home Interlocking Sig's. | 5/18/1950 | PRR | RF |
| S-893 | _ | Coded Track Circuits Approaching Distant Interlocking Signals - Universal Code | 3/6/1937 | PRR | RF |
| S-894 | _ | Coded Track Circuits in Automatic Territory - Universal Code | 3/6/1937 | PRR | RF |
| S-897 | _ | Coded Track Circuits Approaching Home Interlocking Signal - Universal Code | 6/30/1935 | PRR | RF |
| S-602 | N | Signal Aspects | 8/30/1950 | PRR | RF |
| SK-862 | A | Control Circuits for Interlocking Signals | 5/6/1954 | PRR | RF |
| 208-S4 | 2 | Four hole insulating Rail Joint, Type ''k" for P. R.. R. Rail Section | 9/28/1913 | PRR | RS |
| S-400 | B | Signals, Position Light | 5/10/1922 | PRR | RS |
| 208-S5 | 1 | Four hole insulating Rail Joint, Type ''k" for P.S. Rail Section (drilled 4,5 & 6 in. per plan 59464 & 59468 | 6/29/1909 | PRR | RS |
| 208-S6 | 1 | Four hole insulating Rail Joint, Type ''k" for P.S. Rail Section (drilled 5, 4-1/2 & 6 in. per plan 59472 & 59476) | 6/29/1909 | PRR | RS |
| 208-S7 | 1 | Four hole insulating Rail Joint, Type ''k" for P.S. Rail Section (drilled 5-1/2 & 7-1/4 & 6 in. per plan 59480) | 6/29/1909 | PRR | RS |
| S-401 | D | Position Light Signal Parts | 6/15/1928 | PRR | RS |
| 208-S8 | _ | Insulating Rail Joint- Type ''k" for 100 lbs., 125lbs. & 130lbs. P.S. Rail | 9/1/1918 | PRR | RS |
| 210-S1 | 3 | Front and Lock Rods | 9/28/1918 | PRR | RS |
| 210-S2 | _ | Front and Lock Rods | 9/28/1918 | PRR | RS |
| 210-S3 | 1 | Details of front & Lock Rods | 9/14/1909 | PRR | RS |
| 210-S4 | 3 | Front & Lock Rods | 2/19/1920 | PRR | RS |
| 210-S5 | 2 | Details of front & Lock Rods | 10/26/1917 | PRR | RS |
| 210-S6 | 2 | Details of front & Lock Rods | 11/10/1917 | PRR | RS |
| 215-S2 | - | Switch operating Rods | 3/18/1919 | PRR | RS |
| S-410 | B | Signal, Position Light Dwarf | 11/9/1926 | PRR | RS |
| 216-S2 | - | Plan of Manard Rail plugged for signal bonding (drilled as per plan 61200 | 7/27/1915 | PRR | RS |
| 217-S1 | 1 | Gauge of distance between magnet Core & armature of electro- pneumatic switch and signal magnets | 7/29/1909 | PRR | RS |
| 218-S1 | 1 | Six hole insulating Rail Joint type "W" for P. R.. R. Rail Section | 2/13/1914 | PRR | RS |
| S-429 | C | Parts for Decking, Railing and Conduit for signal bridges and cantilevers | 5/11/1928 | PRR | RS |
| S-431 | A | Arrangement of decking, railing and conduit on signal cantilevers | 12/15/1927 | PRR | RS |
| S-432 | A | Arrangement of decking, railing and conduit on signal bridges | 5/22/1928 | PRR | RS |
| 218-S2 | 2 | Six hole insulating Rail Joint type "W" for P.S. Rail Section (drilled 4,5&6 in. per plan 59464 & 59468) | 2/13/1914 | PRR | RS |
| 218-S3 | 2 | Six hole insulating Rail Joint type "W" for P.S. Rail Section (drilled 5,4-1/2&6 in. per plan 59472 & 59476) | 2/13/1914 | PRR | RS |
| 218-S4 | 1 | Six hole insulating Rail Joint type "W" for P.S. Rail Section (drilled 5- 1/2 &7-1/4 in. per plan 59480 & 59854) | 2/20/1914 | PRR | RS |
| 218-S5 | - | Six hole insulating Rail Joint type W1 for 85 lb. P.S. Rails | 1/14/1917 | PRR | RS |
| S-458 | B | Signals, one and two-way flag station | 2/23/1927 | PRR | RS |
| S-459 | B | Signal parts, one and two-way flag stations | 2/23/1927 | PRR | RS |
| S-460 | A | Signal parts, one and two-way flag stations | 4/8/1921 | PS | RS |
| 218-S6 | - | Six hole insulating Rail Joint type W1 for 85 lb. P.S. Rails | 2/14/1917 | PRR | RS |
| S-463 | C | Signal, color light highway crossing | 3/22/1928 | PRR | RS |
| 218-S7 | - | Six hole insulating Rail Joint type W1 for 85 lb. P. R. R.. Rails | 2/15/1917 | PRR | RS |
| 218-S8 | - | Four hole insulating Rail Joint type W1 for 85 lb. P.S. Rails | 3/1/1918 | PRR | RS |
| S-464 | B | Sign, for unattended block station | 7/31/1924 | PS | RS |
| 221-S1 | - | Trunking and conduit | 6/5/1918 | PRR | RS |
| 224-S1 | - | Mechanical switch layout- application to single switch | 3/7/1917 | PRR | RS |
| 224-S2 | - | Mechanical switch layout- application to single switch | 3/26/1917 | PRR | RS |
| 225-S1 | - | Mechanical switch layout- application to single switch | 5/9/1917 | PRR | RS |
| 226-S1 | 0 | Mechanical switch layout- application to two single switches | 7/10/1917 | PRR | RS |
| 227-S1 | - | plungers & base plates- for mechanically operated switches | 4/25/1919 | PRR | RS |
| 227-S2 | 0 | Plunger lock for mechanically operated Switches | 1/5/1910 | PRR | RS |
| 228-S1 | - | Mechanical switch layout application to two Single switches 5 ft. to 10 ft. between points | 8/26/1917 | PRR | RS |
| 228-S2 | - | Mechanical switch layout application to two single switches | 9/18/1917 | PRR | RS |
| 230-S2 | - | Flag station and permissive Signal lamp | 2/11/1918 | PRR | RS |
| 231-S1 | - | Mechanical switch layout- application to Single slips and M. P. frogs | 1/22/1919 | PRR | RS |
| 232-S1 | - | Mechanical switch layout- application to Single slips and M. P. frogs | 2/27/1919 | PRR | RS |
| 233-S1 | - | Mechanical switch layout- application to M. P. frogs | 1/28/1918 | PRR | RS |
| 237-S1 | - | Tie straps | 3/22/1917 | PRR | RS |
| 241-S3 | 1 | Aspects of signals outside automatic signal limits | 2/24/1914 | PRR | RS |
| 241-S4 | 1 | Aspects of signals within automatic signal limits | 2/24/1914 | PRR | RS |
| 241-S5 | 0 | Position light signal aspects [old style 4 bulb] | 2/14/1916 | PRR | RS |
| 242-S1 | 1 | Flange Union | 10/13/1910 | PRR | RS |
| 243-S3 | 0 | Mechanical switch layout- application of type ''G" S. & L. movement | 3/18/1919 | PRR | RS |
| S-483X | A | Incandescent Electric Lamps Not shown on Standard Plan S-483 Temporarily Approved for use in Signal Service | 4/12/1923 | PRR | RS |
| S-483X | B | Incandescent Electric Lamps Not shown on Standard Plan S-483 Temporarily Approved for use in Signal Service | 7/9/1923 | PRR | RS |
| 244-S1 | 2 | Flag station signal | 2/6/1920 | PRR | RS |
| 244-S2 | 3 | Flag station signal | 2/6/1920 | PRR | RS |
| S-485 | A | Blade Grip Parts for semaphore signals | 9/29/1920 | PS | RS |
| 246-S1 | 1 | Stop Board | 1/31/1912 | PRR | RS |
| 248-S1 | 2 | Fibre Tags for wire numbering | 11/13/1919 | PRR | RS |
| 249-S1 | 2 | Caustic soda primary battery | 1/5/1914 | PRR | RS |
| S-487 | B | Roundels & Lenses, for semaphore signals | 10/18/1922 | PS | RS |
| 250-S1 | 0 | 4 lb. Gravity battery zinc | 8/30/1910 | PRR | RS |
| 253-S1 | 4 | Arrangement of non-interlocked crossover protected by switch target | 4/13/1917 | PRR | RS |
| S-489 | D | Numerals and Letters for signal numbering | 6/3/1927 | PRRS | RS |
| 253-S2 | 4 | Arrangement of non-interlocked crossover protected by switch target | 4/13/1917 | PRR | RS |
| 253-S3 | 5 | Arrangement of non-interlocked crossover protected by switch target | 4/13/1917 | PRR | RS |
| 254-S1 | 2 | Arrangement of non-interlocked crossover protected by switch target- details | 6/7/1917 | PRR | RS |
| 263-S2 | 1 | 6 hole one end insulated rail joint type ''w" for P.S. rail section- (drilled 4, 5 &6in. per plans 59464 & 59468) | 1/31/1913 | PRR | RS |
| 263-S3 | 1 | 6 hole one end insulated rail joint type ''w" for P.S. rail section- (drilled 5, 4-1/2 &6in. per plans 59472 & 59476) | 1/31/1913 | PRR | RS |
| 263-S4 | 2 | 4 hole one end insulated rail joint type ''w" for P.S. rail section | 1/30/1913 | PRR | RS |
| 265-S1 | - | Insulating Rail Joint-Type "W. D. A." for 100 lbs., 125 lbs. & 130 lbs. Rails | 5/15/1916 | PRR | RS |
| 265-S2 | - | Four hole "Troy" insulating rail joint-for 100 lbs., 125 lbs. and 130 lbs. P. S. rails | 9/28/1917 | PRR | RS |
| 266-S1 | 1 | Battery Chutes | 2/26/1918 | PRR | RS |
| 266-S2 | - | Details of battery chutes | 1/8/1917 | PRR | RS |
| S-500 | B | Battery, caustic soda primary | 8/31/1927 | PS | RS |
| S-503 | A | Zinc for gravity battery | 11/25/1924 | PRRS | RS |
| 268-S1 | - | Vertical deflecting stand | 5/12/1915 | PRR | RS |
| 269-S1 | - | Multiple unit bolt lock | 3/28/1916 | PRR | RS |
| 271-S1 | - | Mechanical dwarf signal | 6/17/1915 | PRR | RS |
| S-510 | A | Battery boxes | 3/6/1922 | PS | RS |
| 272-S1 | - | Suspended signal | 4/11/1917 | PRR | RS |
| 272-S2 | - | Suspended signal details | 7/19/1915 | PRR | RS |
| 274-S1 | - | Four hole "Continuous" insulating rail joint-for 125 lbs. and 130 lbs. P.S. rails | 9/24/1917 | PRR | RS |
| 275-S1 | - | Four hole insulating rail joint type "B"-for 100 lbs., 125 lbs. and 130 lbs. P. S. rails | 3/11/1918 | PRR | RS |
| 278-S1 | - | Sign for unattended block station | 3/25/1919 | PRR | RS |
| 279-S1 | - | Flag station light signal | 2/6/1920 | PRR | RS |
| 300-S1 | - | Power operated manual block signal | 6/28/1918 | PRR | RS |
| 300-S2 | - | Automatic block signal | 6/28/1918 | PRR | RS |
| S-524 | A | Shields for dwarf signals | 6/24/1920 | PS | RS |
| S-528 | C | Eyelets and tags | 3/14/1927 | PRR | RS |
| 300-S3 | - | Automatic block signal | 6/28/1918 | PRR | RS |
| 300-S4 | - | Power operated interlocked signal | 6/28/1918 | PRR | RS |
| 300-S5 | 0 | Three arm power operated interlocked signal | 5/10/1915 | PRR | RS |
| 300-S6 | - | Power operated distant signal | 6/28/1918 | PRR | RS |
| 300-S7 | - | Power operated distant signal | 6/28/1918 | PRR | RS |
| 301-S1 | 3 | Details of signal masts and parts | 5/10/1915 | PRR | RS |
| 301-S2 | 1 | Details of signal masts and parts | 5/10/1915 | PRR | RS |
| S-531 | E | Instrument Case | 1/10/1928 | PRR | RS |
| S-532 | E | Instrument Cases | 1/10/1928 | PRR | RS |
| S-532 | F | Instrument Cases | 4/16/1929 | PRR | RS |
| 301-S3 | 2 | Details of signal masts and parts | 7/1/1918 | PRR | RS |
| S-533 | E | Instrument Case | 3/14/1928 | PRR | RS |
| S-534 | D | Cable Post and Instrument Cases | 3/14/1928 | PRR | RS |
| S-535 | A | Instrument Case | 3/14/1928 | PRR | RS |
| 301-S4 | 1 | Details of signal masts and parts | 5/10/1915 | PRR | RS |
| 301-S5 | 0 | Details of signal masts and parts | 6/22/1915 | PRR | RS |
| 301-S6 | 0 | Details of signal masts and parts | 4/14/1915 | PRR | RS |
| S-545 | E | Marker for Grade Signal | 8/23/1927 | PRR | RS |
| 301-S7 | - | Details of signal masts and parts | 4/14/1915 | PRR | RS |
| 301-S8 | - | Permissive signal spectacles | 9/17/1918 | PRR | RS |
| 301-S9 | 2 | Details of signal masts and parts | 12/28/1918 | PRR | RS |
| S-547 | A | Monogram for marking tools, lanterns, tinware etc. | 3/3/1924 | PRRS | RS |
| 303-S1 | - | Bracket post | 12/29/1915 | PRR | RS |
| 304-S1 | - | Power operated manual block signal | 7/30/1918 | PRR | RS |
| 304-S2 | - | Power operated interlocked signal | 7/30/1918 | PRR | RS |
| 304-S3 | - | Power operated automatic block signal | 7/30/1918 | PRR | RS |
| 304-S4 | - | Power operated automatic block signal | 7/30/1918 | PRR | RS |
| 304-S5 | - | Power operated distant signal | 7/30/1918 | PRR | RS |
| 304-S6 | - | Power operated distant signal | 7/30/1918 | PRR | RS |
| 305-S1 | - | Layout of facing point switch controlling mechanical distant switch | 4/11/1917 | PRR | RS |
| 305-S2 | - | Mechanism for operating mechanical distant switch signal | 4/11/1917 | PRR | RS |
| 310-S1 | 1 | Arrangement of mechanical ground slots | 4/12/1917 | PRR | RS |
| 310-S2 | 2 | Arrangement of mechanical ground slots | 4/11/1917 | PRR | RS |
| 312-S1 | - | Position light signal units and masts [old style 4 light] | 1/5/1920 | PRR | RS |
| EMW150 | - | Specifications for Installation of Automatic Signals and Electric Circuits | 1/12/1909 | PRR | RS |
| EMW50 | - | Specifications for Rubber Insulated Signal Wires and Cables | 5/1/1910 | PRR | RS |
| IDX | _ | Index, Standard Signal Material Plans and Specifications | 10/1/1923 | PRR | RS |
| RevNot1 | _ | Revision notice-S-179C, S-477-B, S-528-B, 489-B | 6/17/1924 | PRR | RS |
| RevNot2 | _ | Revision notice-S-528-C, S-400-C, S-401-B, S-482-A, S-483-B | 11/20/1923 | PRR | RS |
| RightLine | _ | Instructions and Specifications for right-line Signal Plans | 1/1/1915 | PRR | RS |
| S-115 | B | Foundations for Pipe Carriers and Instrument Cases | 7/27/1927 | PRR | RS |
| S-116 | C | Foundation for Compensators and Cranks | 11/23/1927 | PRR | RS |
| S-118 | A | Jaw Parts | 6/4/1920 | PS | RS |
| S-121 | A | Jaws and Lugs | 8/2/1920 | PS | RS |
| S-131 | A | Expansion Joint Parts | 6/30/1921 | PS | RS |
| S-138 | C | Pipe Carrier Parts | 11/26/1926 | PRR | RS |
| S-140 | B | Pipe Carriers | 11/26/1926 | PRR | RS |
| S-142 | B | Pipe Carrier Supports | 5/28/1928 | PRR | RS |
| S-175 | A | Channel Pins | 4/26/1921 | PS | RS |
| S-179 | G | Rail Bonds and clips (Sheet 1/1) | 11/7/1927 | PRR | RS |
| S-179 | H | Rail Bonds and clips (Sheet 1/1) | 2/1/1929 | PRR | RS |
| S-182 | F | Track Circuit Connections | 2/16/1927 | PRR | RS |
| S-183 | B | Track Circuit Connection | 11/10/1927 | PRR | RS |
| S-186 | B | Trunking and Capping | 3/6/1923 | PRRS | RS |
| S-186 | C | Trunking and Capping | 9/6/1929 | PRRS | RS |
| S-201 | B | Layout, Single Switch, Type "G" Mechanism | 10/18/1922 | PS | RS |
| S-210 | B | Layout, Single Switch Type, ''A-1" Mechanism | 10/28/1926 | PRR | RS |
| S-221 | A | Switch Circuit Controller | 3/4/1925 | PRRS | RS |
| S-228 | A | Arrangement for Locking Non-Interlocked Crossover Protected by Signal | 2/20/1922 | PS | RS |
| S-229 | B | Arrangement for Locking Non-Interlocked Crossover Protected by Signal | 10/9/1926 | PRR | RS |
| S-230 | B | Arrangement for Locking Non-Interlocked Crossover Protected by Signal | 11/26/1926 | PRR | RS |
| S-231 | B | Arrangement for Locking Non-Interlocked Crossover Protected by Signal | 11/26/1926 | PRR | RS |
| S-232 | B | Arrangement for Locking Non-Interlocked Turnout Protected by Signal | 11/9/1926 | PRR | RS |
| S-256 | B | Plunger Lock | 4/22/1925 | PS | RS |
| S-305 | E | Front and lock rods for single switches | 6/27/1927 | PRR | RS |
| S-305 | F | Front and lock rods for single switches | 3/30/1929 | PRR | RS |
| 200-S1 | 1 | Mechanical Interlocking Machine | 8/21/1917 | PRR | RS |
| 200-S2 | 0 | Mechanical Interlocking Machine | 8/17/1909 | PRR | RS |
| S-308 | A | Front and Lock Rods | 7/11/1923 | PRRS | RS |
| 200-S3 | 0 | Mechanical Interlocking Machine | 8/17/1909 | PRR | RS |
| S-309 | B | Front and Lock Rods for M. P. Frogs | 4/3/1924 | PRRS | RS |
| 200-S4 | 0 | Mechanical Interlocking Machine | 8/17/1909 | PRR | RS |
| 202-S1 | _ | Up and down Rods for mechanical Interlocking Machines | 6/6/1917 | PRR | RS |
| S-311 | D | Lock Rods | 2/23/1926 | PRR | RS |
| S-311 | E | Lock Rods | 7/5/1927 | PRR | RS |
| 204-S4 | _ | Vertical Cranks | 10/15/1914 | PRR | RS |
| 205-S2 | _ | Compensation Tables, With Typical Layouts | 7/10/1917 | PRR | RS |
| S-321 | E | Front rod parts | 8/6/1925 | PRR | RS |
| S-321 | F | Front lock rods | 3/23/1929 | PRR | RS |
| 206-S1 | _ | Jaws, Adjusting Screws and Links | 4/26/1917 | PRR | RS |
| S-323 | C | Front rod parts for slip switches | 9/18/1925 | PRRS | RS |
| 206-S2 | _ | One Inch pipe line Insulation | 2/16/1917 | PRR | RS |
| 206-S3 | _ | Solid and Adjustable Links | 3/9/1917 | PRR | RS |
| S-325 | B | Front rod parts for M. P. frogs | 4/3/1924 | PRRS | RS |
| 207-S1 | 2 | Rail Clips for 3/8" Mechanically operated detector bars, P. R. R. Rail Section | 2/14/1910 | PRR | RS |
| S-331 | D | Operating rods for single switches | 2/16/1928 | PRR | RS |
| S-331 | E | Operating rods for single switches | 3/30/1929 | PRR | RS |
| 207-S2 | 3 | Rail Clips for 3/8" Mechanically operated detector bars P.S. Rail Section | 2/14/1910 | PRR | RS |
| S-333 | A | Operating rods for double slip switches | 5/12/1924 | PRRS | RS |
| 207-S3 | 1 | Mechanically operated deflector Bar | 1/3/1910 | PRR | RS |
| S-335 | A | Operating rods for M. P. frogs | 5/12/1924 | PRRS | RS |
| 207-S4 | 0 | Deflector bar Driving Piece | 1/5/1910 | PRR | RS |
| 208-S1 | 2 | Six hole insulating Rail Joint, Type ''k" for P. R.. R. Rail Section | 9/28/1914 | PRR | RS |
| 208-S2 | 2 | Six hole insulating Rail Joint, Type ''k" for P.S. Rail Section (drilled 4,5 & 6 in. per plan 59464 & 59468 | 9/28/1914 | PRR | RS |
| SigPipe | _ | Specifications for One-Inch Signal pipe and Couplings | 4/1/1909 | RS | |
| SK-1082 | - | Approach Sign indicating Railroad Ahead | 7/21/1919 | PRR | RS |
| S-375 | A | Drawbridge Locking for Lift Draw | 11/28/1927 | PRR | RS |
| SK-184 | A | Trade Circuit Connector- Parkway Cable | 2/8/1929 | PRR | RS |
| SK-184 | B | Trade Circuit Connector- Parkway Cable | 9/16/1929 | PRR | RS |
| 208-S3 | 2 | Six hole insulating Rail Joint, Type ''k" for P.S. Rail Section (drilled 5, 4-1/2 & 6 in. per plan 59472 & 59476) | 10/7/1914 | PRR | RS |