Search the Insulator Patent Reference Library:

Build your search criteria. The patent must match all the values specified.
Select patent types: Utility   Design   Reissue
Patent number:
Date:
Year between: and
Patentee starting with:
City:
State:
Assigned To starting with:
Description containing:
Category:
Class:    Subclass:
Click Search when complete:
SELECT DISTINCT patent.*, YEAR(date) as year FROM patent WHERE (category = 'Third Rail') ORDER BY date ASC, patent, type

Total of 54 patents found where: Category is 'Third Rail';

View a patent by clicking on the patent number. You can sort by any of the columns by clicking on the column name.

T / S Patent Date Description Patentee Category Assigned To
 1885
U 320,631 June 23, 1885 Insulator for Tracks
Third rail insulator with rubber under the rail and below the insulator. The rail is bolted to the insulator.		 DAFT, Leo
 Third Rail  
U 320,632 June 23, 1885 Electric Conductor
Third rail insulator with rubber under the rail and below the insulator. The rail is bolted to the insulator.		 DAFT, Leo
 Third Rail  
U 320,633 June 23, 1885 Electric Conductor
Third rail insulator flared down away from the pin.		 DAFT, Leo
 Third Rail  
 1889
U 402,836 May 7, 1889 Insulator and Holder for Electric Railways
Third rail insulator clamps the rail upsidedown.		 JENNINGS, Byron
 Third Rail  
 1890
U 433,409 July 29, 1890 Electric Railway
Electric railway with third rail insulated with glass insulators.		 KEITHLEY, Herbert R.
 Third Rail  
 1891
U 455,107 June 30, 1891 Insulator
Third rail insulator with cup to hold hygroscopic chemical and means to heat insulator to drive off moisture		 MUNSIE, James F.
 Third Rail  
 1896
U 556,971 March 24, 1896 Insulated Support for Contact Rails
Third rail insulator with top and side brackets (see reissue 11,613 on 6-22-1897)		 HANSON, Augustus
CHAPMAN, James R.
 Third Rail  
U 563,482 July 7, 1896 Insulating Support for Rails or Electric Railways
Third rail pin type insulator		 HALEY, Patrick
 Third Rail  
U 570,034 October 27, 1896 Insulator
Third rail insulator		 MARTIN, Charles B.
HEWLETT, Edward M.
 Third Rail General Electric Co.
U 574,101 December 29, 1896 Insulator
Third rail insulator		 MARTIN, Charles B.
 Third Rail General Electric Co.
 1897
U 584,476 June 15, 1897 Insulator
Third rail insulator with a metal base to prevent movement of the insulator and rail.		 LIBBY, Sam H.
 Third Rail General Electric Co.
U 584,477 June 15, 1897 Insulator
Pair of third rail insulators set on both sides of the rail fitting in the contour of the sides of the rail.		 LIBBY, Sam H.
 Third Rail General Electric Co.
R 11,613 June 22, 1897 Insulator Support for Contact Rails
Third rail insulator with top and side brackets (reissue of 556,971)		 HANSON, Augustus
CHAPMAN, James R.
 Third Rail General Electric Co.
U 595,089 December 7, 1897 Third Rail Insulator
Third rail insulator with metal protective covering.		 ANDERSON, Albert
 Third Rail 1/2 to Johan M. Anderson
 1898
D 28,981 July 5, 1898 Design for a Cap for Insulators
Third rail insulator metal cap		 WILLARD, Ben
 Third Rail General Electric Co.
U 606,830 July 5, 1898 Insulator
Third rail insulator mounted on a wooden block with metal cap on top to support the rail		 WILLARD, Ben
 Third Rail General Electric Co.
D 29,741 November 29, 1898 Design for a Third Rail Insulator
Third rail insulator		 HEWLETT, Edward M.
 Third Rail General Electric Co.
 1899
U 619,974 February 21, 1899 Rail Insulator
Third rail insulator with metal cap that secures the rail to the insulator.		 MARTIN, Charles B.
 Third Rail  
U Specimen known 628,667 July 11, 1899 Insulated Rail Support
Third rail type (see stoneware specimen in 1989 CJ)		 KING, Charles K.
MEAD, George A.
 Third Rail  
 1900
U 644,646 March 6, 1900 Insulator for Use on Electric Railways
Third rail insulator		 THOMAS, James
THOMAS, William R.
 Third Rail  
U 648,057 April 24, 1900 Third Rail Insulator
Third rail insulator designed to allow insulator to rise and fall with movement of the rail.		 RICE, JR, Edwin W.
 Third Rail General Electric Co.
U Specimen known 664,470 December 25, 1900 Construction for Third Rail Electric Railways
Third rail insulator, support, and fastening device. Insulator was made by the Reconstructed Granite Co. as shown in their advertisement in EWE dated April 15, 1905.		 COURTENAY, William
 Third Rail  
 1901
U 675,615 June 4, 1901 Insulator
Third rail insulator with iron mounting bracket and cap to support the rail		 ANDERSEN, Johan M.
ANDERSEN, Albert
 Third Rail  
U 678,195 July 9, 1901 Third Rail Insulator
Third rail insulator with iron mounting bracket and cap to support the rail		 POTTER, William B.
 Third Rail General Electric Co.
 1902
U 693,603 February 18, 1902 Third Rail Insulator for Electric Railways
Square third rail insulator with metal foot and metal cap that fit in a square hole in top and bottom of the insulator.		 HOBBS, Charles M.
 Third Rail 1/2 to Harold P. Brown
U 717,389 December 30, 1902 Third Rail Insulator
Third rail insulator mounted on pedestal with metal cap to secure the rail.		 GONZENBACH, Ernest
 Third Rail  
 1903
U 723,062 March 17, 1903 Third Rail Insulator
Third rail insulator with ears that move in to secure the rail.		 STEWART, JR., Samuel B.
 Third Rail General Electric Co.
 1904
U 761,553 May 31, 1904 Third Rail Support
Third rail insulator made of Electrose		 STEINBERGER, Louis
 Third Rail  
U 762,297 June 14, 1904 Third Rail Insulator
Third rail insulator with enameled top and bottom plate		 FRITZE, Henry L.
 Third Rail  
U 763,434 June 28, 1904 Insulating Support for Electric Third Rails
Third rail insulator with metal bracket that fits in grooves on the upper sides of the insulator.		 SLATER, Frederick R.
 Third Rail 1/2 to Robert W. Lyle
U 764,384 July 5, 1904 Insulating Support for Electric Third Rails
Third rail insulator that screws into metal support ahd has a threaded hole in top to receive the metal rail support.		 SLATER, Frederick R.
 Third Rail Bleecker S. Barnard
U 770,960 September 27, 1904 Third Rail Insulator
Third rail insulator with metal cap to hold the rail and a metal clip to secure the insulator to the metal support.		 DUNBAR, Robert V.
 Third Rail  
U 771,334 October 4, 1904 Third Rail Insulator
U-shaped third rail insulator metal caps fitting over each part to support rails.		 STEWART, JR., Samuel B.
 Third Rail General Electric Co.
U 775,592 November 22, 1904 Insulating Support for Electric Third Rails
Third rail with two bolts to secure it to the support and a metal cap to secure the rail.		 BARARD, Walter Hubbard
 Third Rail  
 1905
U 780,316 January 17, 1905 Third Rail Insulator
Cylindrical third rail insulator with inner core of cement to secure the metal cap and metal support to the insulator.		 WINSOR, Paul
 Third Rail  
U 781,661 February 7, 1905 Stringer Support for Electric Third Rails
Method of mounting stringers for third rails made of a beam of wood on standard telegraph and telephone glass insulators		 KINSMAN, Frank E.
 Third Rail  
U 786,472 April 4, 1905 Insulator for the Conductors of Electric Railways
Third rail insulator (England; Ohio Brass) (Brown p. 75)		 WARD, Frank D.
FURNISS, Harry C.
 Third Rail 1/3 to Henry Bradford
U 790,957 May 30, 1905 Insulating Support for Third Rails
Support for third rail with insulating material between the support and the rail.		 FARNHAM, Wilson
 Third Rail  
U 796,501 August 8, 1905 Conductor Rail Holder for Electric Railways
Third rail insulator and metal clips and rail holder		 COURTENAY, George L.
 Third Rail  
U 802,498 October 24, 1905 Retaining Clip for Third Rail Insulators
Retaining clip for third rail insulators to secure the rail.		 COURTENAY, William
 Third Rail  
U 808,222 December 26, 1905 Third Rail Insulator
Third rail insulator that fits in metal support and cemented metal cap to secure the rail.		 STEWART, JR., Samuel B.
 Third Rail General Electric Co.
 1906
U 829,416 August 28, 1906 Third Rail Insulator
Third rail insulator with 2-part metal cap to secure the rail.		 MCGILL, John J.
 Third Rail 1/2 to Frank J. Guernsey
 1907
U 843,844 February 12, 1907 Third Rail Insulator
Third rail insulator		 REDMAYNE, Robert Norman
 Third Rail  
 1908
U 877,804 January 28, 1908 Insulator for Heavy Conductors
Third rail insulator made of Electrose.		 STEINBERGER, Louis
 Third Rail  
U 888,318 May 19, 1908 Third Rail Insulator
Third rail insulator with metal cap to secure the rail.		 DELLOYE, Lucien Henri
 Third Rail Societe Anonyme des Manufactures Des Glaces et Produits Chimiques de Saint-Gobain
U 908,136 December 29, 1908 Third Rail Insulator
Third rail insulator (Ohio Brass)		 RANDOLPH, Leonard M.
 Third Rail Essex Co.
U 908,180 December 29, 1908 Third Rail
Third rail insulator system (Ohio Brass)		 WILGUS, William J.
SPRAGUE, Frank J.
 Third Rail  
 1909
U 917,501 April 6, 1909 Third Rail Insulator
Electrose third rail insulator.		 STEINBERGER, Louis
 Third Rail  
U 922,951 May 25, 1909 Third Rail Insulator
Conical shaped third rail insulator.		 RANDOLPH, Leonard M.
 Third Rail Essex Co.
U 928,709 July 20, 1909 Insulator for Third Rails
Third rail insulator made of Electrose		 STEINBERGER, Louis
 Third Rail  
U 932,523 August 31, 1909 Insulator for Third Rails
Third rail insulator.		 WEAVER, Eugene M.
 Third Rail  
 1914
U Specimen known 1,090,234 March 17, 1914 Insulating and Supporting Mechanism
Ohio Brass third rail support insulator designed to be use on narrower ties		 ROGERS, Joseph W.
 Third Rail 1/2 to Nathan Shute
U 1,111,570 September 22, 1914 Insulator
Third rail insulator with bolt holes on top and bottom side and flange projecting out in the center of the side designed to carry the rail on top		 FRIEDLAENDER, Eugene
 Third Rail  
 1934
U Specimen known 1,984,245 December 11, 1934 Insulator Support for Power Rails
Third rail insulator with interlocking pin and pinhole and side grooves to secure the rail on top		 BANKS, William C.
 Third Rail  

Total of 0.02 seconds