PRR Signal Standard Plans

Here is a partial list of PRR standard plans relating to signaling. Plans that I have copies of have the revision code for the revision that is online. Plans that I don't have copies of have "needed" as the revision. If you have a copy of any needed plans or better quality copies of plans I have online, please let me know!

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 Plan #

Plan # Revision Title Rev date Railroad C of
1-S - Foundations and Formers for Compensators, Pipe-Carriers, Cranks and Wheels 1/15/1904 1/15/1904 PRR RS

2-S - Diagrams showing standard methods of signaling at interlockings 10/28/1903 PRR RS

3-S - Lead out Shafts, Bearings & Up & Down Rods for S. & F. Interlocking Machine 3/30/1905 9/11/1907 PRR RS

3-S 1 Rocker Shafts, Bearings and Up & Down Rods 1/9/1908 PRR RS

6-S - Two Arm Iron Mechanical and Pneumatic Bridge Semaphore Signal. 10/27/1904 PRR RS

7-S - General Arrangement of Route Signal for Ground Post 10/3/1903 PRR RS

8-S - One Arm Iron Post Mechanical and Pneumatic Semaphore Signal 10/11/1903 PRR RS

9-S - Standard Four Arm Electro pneumatic Bracket Post 10/27/1904 PRR RS

10-S - Distant Switch Signal Layout Operated by No. 11 Switch & Lock Movement 1/25/1905 PRR RS

200-S1 1 Mechanical Interlocking Machine 8/21/1917 PRR RS

200-S2 0 Mechanical Interlocking Machine 8/17/1909 PRR RS

200-S3 0 Mechanical Interlocking Machine 8/17/1909 PRR 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

204-S4 _ Vertical Cranks 10/15/1914 PRR RS

205-S2 _ Compensation Tables, With Typical Layouts 7/10/1917 PRR RS

206-S1 _ Jaws, Adjusting Screws and Links 4/26/1917 PRR RS

206-S2 _ One Inch pipe line Insulation 2/16/1917 PRR RS

206-S3 _ Solid and Adjustable Links 3/9/1917 PRR RS

207-S1 2 Rail Clips for 3/8" Mechanically operated detector bars, P. R. R. Rail Section 2/14/1910 PRR RS

207-S2 3 Rail Clips for 3/8" Mechanically operated detector bars P.S. Rail Section 2/14/1910 PRR RS

207-S3 1 Mechanically operated deflector Bar 1/3/1910 PRR 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

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

208-S4 2 Four hole insulating Rail Joint, Type "k" for P. R.. R. Rail Section 9/28/1913 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

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

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

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

218-S6 - Six hole insulating Rail Joint type W1 for 85 lb. P.S. Rails 2/14/1917 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

221-S1 - Trunking and conduit 6/5/1918 PRR RS

223-S 2 Standard Arrangement for Locking Shear-Pole Drawbridges with Signals and Smashboards Operated from Draw 3/20/1919 PRR RS

223-S1 1 Standard Arrangement for Locking Shear-Pole Drawbridges with Signals and Smashboards Operated from Draw 3/20/1919 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

244-S1 2 Flag station signal 2/6/1920 PRR RS

244-S2 3 Flag station signal 2/6/1920 PRR 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

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

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

257-S2 0 Method of Locking Hand Operated Switch 1/28/1913 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

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

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

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

301-S3 2 Details of signal masts and parts 7/1/1918 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

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

303-S1 - Bracket post 12/29/1915 PRR RS

304-S1 1 One Arm Power Interlocked Signal 7/5/1917 PRR RS

304-S2 1 Two Arm Power Interlocked Signal 7/5/1917 PRR RS

304-S3 1 One Arm Power Operated Automatic Block Signal 7/5/1917 PRR RS

304-S4 1 Two Arm Power Operated Automatic Block Signal 7/5/1917 PRR RS

304-S5 1 One Arm Power Operated Distant Signal 5/10/1915 PRR RS

304-S6 1 Two Arm Power Operated Distant Signal 5/10/1915 PRR RS

304-S7 1 One Arm Power Operated Interlocking Signal 5/10/1915 PRR RS

304-S1 2 Power operated manual block signal 7/30/1918 PRR RS

304-S2 2 Power operated interlocked signal 7/30/1918 PRR RS

304-S3 2 Power operated automatic block signal 7/30/1918 PRR RS

304-S4 2 Power operated automatic block signal 7/30/1918 PRR RS

304-S5 2 Power operated distant signal 7/30/1918 PRR RS

304-S6 2 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

309-S1 - Decking and Hand Railings for Signal Bridges 5/29/1919 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

311-S1 - Foundations for Ground Signal Masts 4/7/1916 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-100 B Cranks and Stand, One Way Horizontal 1/19/1928 PRR PM

S-100 C Cranks and Stand, One Way Horizontal 1/8/1958 PRR RS

S-101 B Cranks and Stand, Two Way Horizontal 1/19/1928 PRR PM

S-101 C Cranks and Stand, Two Way Horizontal 1/8/1958 PRR RS

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-115 B Foundations for Pipe Carriers and Instrument Cases 7/27/1927 PRR RS

S-115 C Foundations, Pipe Carriers and Instrument Cases 7/11/1934 PRR PM

S-116 C Foundation for Compensators and Cranks 11/23/1927 PRR RS

S-116 D Foundations for Compensators and Cranks 7/11/1934 PRR PM

S-117 A Instrument Case Foundations 7/12/1935 PRR JR

S-118 A Jaw Parts 6/4/1920 PS RS

S-118 B Screw and Solid Jaws 5/20/1940 PRR PM

S-118 C Screw and Solid Jaws 1/10/1958 PRR RS

S-121 A Jaws and Lugs 8/2/1920 PS RS

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-131 A Expansion Joint Parts 6/30/1921 PS RS

S-136 B Pipe for Signals and Interlocking 10/18/1926 PRR PM

S-138 C Pipe Carrier Parts 11/26/1926 PRR RS

S-138 D Pipe Carrier Parts 5/22/1930 PRR PM

S-139 A Pipe Carrier Parts 5/24/1920 PS PM

S-140 B Pipe Carriers 11/26/1926 PRR RS

S-140 C Pipe Carriers 5/22/1930 PRR PM

S-142 B Pipe Carrier Supports 5/28/1928 PRR RS

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-167 A Leadout foundation Rocker Shaft 4/29/1921 PS PM

S-170 A Leadout Foundation parts- for Rocker Shaft Leadout 4/29/1921 PS PM

S-175 A Channel Pins 4/26/1921 PS RS

S-176 A Layout for Type AZ Impedance Bonds 5/4/1933 PRR RS

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-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-179 J Rail Bonds and clips (Sheet 1/1) 10/23/1931 PRR RS

S-179 K Rail Bonds and Connectors (Sheet 2/2) 11/4/1937 PRR JR

S-179 L Rail Bonds and Connectors (Sheet 1/2) 11/12/1946 PRR JR

S-179 M Rail Bonds and Connectors 12/28/1948 PRR JR

S-180 C Rail Bond, Rail Head Type 8/25/1942 PRR PM

S-182 F Track Circuit Connections 2/16/1927 PRR RS

S-182 I Track Circuit Connections 5/22/1935 PRR RS

S-182 J Track Circuit Connections 4/27/1948 PRR JR

S-182 K Track Circuit Connections, Non-Interlocked switches, steam or A-C electrified territory 1/10/1949 PRR JR

S-183 B Track Circuit Connection 11/10/1927 PRR RS

S-184 E Track Circuit Connections, Parkway Cable 10/17/1934 PRR RS

S-184 F Track Circuit Connections, Parkway Cable 5/16/1938 PRR RS

S-184 G Track Circuit Connections, Parkway Cable 3/6/1939 PRR JR

S-184 H Track Circuit Connections, Parkway Cable 11/12/1946 PRR RS

S-184 J Track Circuit Connections, Parkway Cable 12/27/1951 PRR PM

S-184 K Track Circuit Connections, Parkway Cable 7/15/1966 PRR JR

S-186 B Trunking and Capping 3/6/1923 PRRS RS

S-186 C Trunking and Capping 9/6/1929 PRRS RS

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-201 B Layout, Single Switch, Type "G" Mechanism 10/18/1922 PS RS

S-201 C Layout, Single Switch, Type "G" Mechanism 4/16/1926 PRR PM

S-201 D Layout, Single Switch, Type "G" Mechanism 8/21/1934 PRR JR

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-210 B Layout, Single Switch Type, "A-1" Mechanism 10/28/1926 PRR RS

S-210 C Layout, Single Switch, Type "A-5" Mechanism 10/11/1932 PRR RS

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-221 A Switch Circuit Controller 3/4/1925 PRRS RS

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-228 A Arrangement for Locking Non-Interlocked Crossover Protected by Signal 2/20/1922 PS RS

S-228 D Arrangement for Locking Non-Interlocked Crossover 12/30/1932 PRR JR

S-228 E Arrangement for Locking Non-Interlocked Crossover 2/6/1950 PS RS

S-229 B Arrangement for Locking Non-Interlocked Crossover Protected by Signal 10/9/1926 PRR RS

S-229 C Arrangement for Locking Non-Interlocked Crossover 12/30/1932 PRR PM

S-230 B Arrangement for Locking Non-Interlocked Crossover Protected by Signal 11/26/1926 PRR RS

S-230 C Arrangement for Locking Non-Interlocked Crossover Protected by Signal 12/30/1932 PRR PM

S-231 B Arrangement for Locking Non-Interlocked Crossover Protected by Signal 11/26/1926 PRR RS

S-231 C Arrangement for Locking Non-Interlocked Crossover Protected by Signal 12/30/1932 PRR PM

S-232 B Arrangement for Locking Non-Interlocked Turnout Protected by Signal 11/9/1926 PRR RS

S-232 C Locking for Non-Interlocked Turnouts Equipped with Derail 1/25/1950 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-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-237 A Lever and Stand 6/15/1944 PRR JR

S-237 C Lever and Stand 10/25/1946 PRR PM

S-241 F Dragging Equipment Detector 3/4/1939 PRR PM

S-241 J Dragging Equipment Detector 6/5/1942 PRR PM

S-241 K Dragging Equipment Detector, Parts and Details 8/20/1947 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-250 B Electric Switch Heaters, Active Element 24 feet or less in Length, A.C. Operation 8/12/1954 PRR RS

S-250 C Electric Switch Heaters, A-C and D-C Operation Any Length 1/8/1962 PRR JR

S-255 A Plunger Lock and Circuit Controller 2/11/1922 PS PM

S-256 A Plunger Lock 12/14/1921 PS PM

S-256 B Plunger Lock 4/22/1925 PS RS

S-258 D Switch Mechanism, Type "G" 12/23/1926 PRR PM

S-260 A Switch Mechanism, Hand Operated 10/26/1926 PRR PM

S-265 A Duplex switch lock 8/2/1920 PS PM

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

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 A Front and Lock Rods 7/11/1923 PRRS RS

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 B Front and Lock Rods for M. P. Frogs 4/3/1924 PRRS RS

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 D Lock Rods 2/23/1926 PRR RS

S-311 E Lock Rods 7/5/1927 PRR RS

S-311 F Lock Rods 3/20/1929 PRR PM

S-311 G Lock Rods 5/10/1945 PRR PM

S-321 E Front rod parts 8/6/1925 PRR RS

S-321 F Front lock rods 3/23/1929 PRR RS

S-321 H Front Rod Parts 3/6/1936 PRR PM

S-323 C Front rod parts for slip switches 9/18/1925 PRRS RS

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 B Front rod parts for M. P. frogs 4/3/1924 PRRS RS

S-325 C Front Rod Parts for Movable Point Switches 2/20/1935 PRR PM

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

S-331 G Operating rods for single switches 6/20/1935 PRR RS

S-331 I Operating Rods for Single Switches 9/5/1946 PRR PM

S-333 A Operating rods for double slip switches 5/12/1924 PRRS RS

S-333 C Operating Rods for Double Slip Switches 12/6/1937 PRR PM

S-335 A Operating rods for M. P. frogs 5/12/1924 PRRS RS

S-335 B Operating rods for M. P. frogs 11/12/1936 PRRS RS

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 B Drawbridge Locking for Center Pivot Draw 8/16/1937 PRR RS

S-372 D Drawbridge Locking for Center Pivot Draw 12/30/1948 PRR PM

S-375 A Drawbridge Locking for Lift Draw 11/28/1927 PRR RS

S-375 B Drawbridge Locking for Lift Draw 5/6/1935 PRR PM

S-380 A Smashboards 7/23/1936 PRR PM

S-400 B Signals, Position Light 5/10/1922 PRR RS

S-400 C Signals, Position Light 6/16/1921 PRR RS

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-400 H Position Light Signals 6/29/1954 PRR RS

S-400 I Position Light Signals 1/2/1958 PRR RS

S-400 J Position Light Signals 10/14/1963 PRR JR

S-401 D Position Light Signal Parts 6/15/1928 PRR RS

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-401 G Position Light Signal Parts 8/12/1954 PRR RS

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 B Signal, Position Light Dwarf 11/9/1926 PRR RS

S-410 D Signals, Position Light 2/13/1934 PRR PM

S-425 needed Signal Supports for Bridge 12/31/1899 - -

S-427 needed Signal Supports for Catenary Poles 12/31/1899 - -

S-429 C Parts for Decking, Railing and Conduit for signal bridges and cantilevers 5/11/1928 PRR RS

S-429 D Parts for Decking, Railing and Cable Supports for signal bridges and cantilevers 8/26/1931 PRR JR

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

S-432 B Arrangement of Decking Railing and Cable Supports on Signal Bridges 8/26/1931 PRR JR

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-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

S-462 A Layout for Automatic Highway Crossing Gates 9/30/1947 PRR PM

S-463 C Signal, color light highway crossing 3/22/1928 PRR RS

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 B Sign, for unattended block station 7/31/1924 PS RS

S-464 C Block-Limit Signal and Approach Block-Limit Sign 6/18/1943 PRR PM

S-464 D Block-Limit Signal and Approach Block-Limit Sign 5/17/1944 PRR JR

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-466 B Highway Crossing Signs, Reflectorized Aluminum 1/23/1961 PRR JR

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 A Signs, Illuminated 1/21/1945 PRR JR

S-469 B Signs, Illuminated 8/9/1949 PRR PM

S-469 D Signs, Illuminated 10/14/1963 PRR JR

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 D Incandescent Electric Lamps 7/14/1930 PRR JR

S-483 E Incandescent Electric Lamps 12/4/1945 PRR PM

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

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-485 A Blade Grip Parts for semaphore signals 9/29/1920 PS RS

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 B Roundels & Lenses, for semaphore signals 10/18/1922 PS RS

S-487 C Roundels & Lenses, for semaphore signals 2/8/1927 PRR PM

S-487 D Roundels & Lenses 2/5/1934 PRR RS

S-487 E Roundels & Lenses 7/24/1937 PRR PM

S-489 D Numerals and Letters for signal numbering 6/3/1927 PRRS RS

S-489 F Numerals and Letters, Enameled, for Signal Numbering 11/27/1942 PRR JR

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-500 B Battery, caustic soda primary 8/31/1927 PS RS

S-503 A Zinc for gravity battery 11/25/1924 PRRS RS

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 A Battery boxes 3/6/1922 PS RS

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 E Terminal Blocks 10/23/1934 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 D Blocking Devices for Interlocking Machine Levers 3/21/1931 PRR RS

S-522 F Blocking Devices for Interlocking Machine Levers 1/10/1935 PRR PM

S-524 A Shields for dwarf signals 6/24/1920 PS RS

S-528 C Eyelets and tags 3/14/1927 PRR RS

S-528 G Eyelets, Tags & Connectors 3/21/1935 PRR JR

S-528 H Eyelets, Tags & Connectors 5/7/1945 PRR JR

S-528 J Eyelets, Tags & Connectors 5/17/1950 PRR PM

S-528 K Eyelets, Tags & Connectors 7/31/1952 PRR PM

S-528 M Eyelets, Tags & Connectors 8/12/1954 PRR RS

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 G Instrument Case 11/18/1942 PRR JR

S-530 H Instrument Cases 3/4/1946 PRR PM

S-531 C Instrument Case 4/12/1924 PS PM

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

S-532 G Instrument Cases 7/6/1934 PRR PM

S-533 E Instrument Case 3/14/1928 PRR RS

S-534 D Cable Post and Instrument Cases 3/14/1928 PRR RS

S-534 E Cable Post and Instrument Cases 7/6/1934 PRR RS

S-535 A Instrument Case 3/14/1928 PRR RS

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 A Instrument Racks for Interlocking Stations 6/25/1934 PRR RS

S-540 C Instrument Racks for Interlocking Stations 1/13/1938 PRR PM

S-545 E Marker for Grade Signal 8/23/1927 PRR RS

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 A Cable Marker for Underground Cables 11/11/1935 PRR RS

S-546 C Cable Marker for Underground Cables 4/14/1948 PRR PM

S-547 A Monogram for marking tools, lanterns, tinware etc. 3/3/1924 PRRS RS

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 C Atmospheric Aftercooler and Drip Feed 4/23/1934 PRR RS

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-601 A Symbols 4/12/1947 PRR RF

S-602 E Signal Aspects 8/19/1925 PRR RS

S-602 H Signal Aspects 9/10/1942 PRR RS

S-602 N Signal Aspects 8/30/1950 PRR RS

S-800 needed Dimensions of Signal Circuit Plans 12/31/1899 - -

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

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

SK-12 B Locking and Sealing Device for Electric Lock 11/17/1924 PRRS PM

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

SK-530 A Instrument Case 1/10/1930 PRR RS

SK-862 A Control Circuits for Interlocking Signals 5/6/1954 PRR RF

switchtypes - Symbols for Indicating on Single Line Plans the different types of switch throw mechanisms, lamps, targets etc.. 3/24/1941 PRR JR

C of = Collection of. PM = Pat McKinney, RF = Robert Fredland, JR = Jon Roma, RS = Rob Schoenberg (me!)

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