Search the Insulator Patent Reference Library:

Total of 131 patents found where: Category is 'Insulator';

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T / S	Patent	Date	Description	Patentee	Category	Assigned To
		1851
U	8,438	October 14, 1851	Improvement in Insulators for Telegraphs CD 1012 & CD 1014, slotted glass tube mounted in a wooden bracket	YANDELL, John	Insulator
		1867
U	64,654	May 14, 1867	Improvement in Insulators CD 732.2, threadless insulator with enlarged chamber for slotted pin (CJ 6-93-12)	FLOYD, George	Insulator
		1871
U	110,645	January 3, 1871	Improvement in Glass Telegraph Insulators CD 1040 threaded, tapered glass insulator to screw into crossarm or pole	GARITY, John	Insulator
U	114,924	May 16, 1871	Improvement in Telegraph Insulators CD 158.1 with metal ring with fingers to hold wire	CHESTER, Stephen	Insulator
		1872
U	123,878	February 20, 1872	Improvement in Telegraph Insulators CD 141.9, four projections to reduce surface contact	EMMINGER, David R. P.	Insulator
U	133,595	December 3, 1872	Improvement in Insulation of Telegraph lines Insulator suspended from sub cross-bar (CJ 9-85-14)	ROGERS, James H.	Insulator
		1874
U	154,451	August 25, 1874	Improvement in Telegraph Insulators CD 109.5 self-tying with three projections on top (similar to Harloe)	BROOKE, Homer	Insulator
		1877
U	187,183	February 6, 1877	Improvement in Telegraph Insulators CD 130.2, wire groove composed of a series of projections	SEILER, Paul	Insulator	1/2 to Joseph Herz
U	194,220	August 14, 1877	Improvement in Lightning Rods and Insulators CD 317 lightning rod insulator and spiral lightning rod	CHAMBERS, Josephus C.	Insulator
		1879
U	216,138	June 3, 1879	Improvement in Telegraph Insulators Insulator suspended under crossarm by screw to hold wireholder	BLOOMFIELD, John H.	Insulator
		1882
U	252,857	January 24, 1882	Insulator for Telegraph Wires Insulators strung on wires to separate groups of wires in a tube	GORE, Charles L.	Insulator	1/4 to John Townsend
		1883
U	276,839	May 1, 1883	Insulator for Telegraph Wires CD 110.5 & CD 110.6 spiral groove crown & clamp for line wire	LEWIS, Joseph Slater	Insulator
U	281,452	July 17, 1883	Telegraph Insulator Insulator with side bracket (see OBX March 1973, p. 43)	CHAPMAN, Thomas L.	Insulator
U	286,801	October 16, 1883	Insulator CD 109, CD 135, diamond shaped wire groove	FISKE, Bradley MOTT, Samuel	Insulator
U	288,360	November 13, 1883	Telegraph Insulator Double petticoat design for style similar to CD 162. An annual recess to receive paraffin to form a broad band of surface protected from moisture	OAKMAN, Samuel	Insulator	The American Insulator Co.
U	289,449	December 4, 1883	Insulator Transposition style but not intended for transposition (CD 199 & U-197)	ROUSSEAU, Necter	Insulator	1/2 to James W. Brennan
U	290,922	December 25, 1883	Insulator for Electrical Conductors CD 110.5 & CD 110.6 spiral crown with opposing internal threads & wire clamp	POPE, Frank L.	Insulator
		1885
U	316,469	April 28, 1885	Electric Wire Insulator Insulators and supporting rail	LOCKE, Joseph BOWKER, William	Insulator	Themselves and Robert Williams
U	316,812	April 28, 1885	Telegraph Insulator CD 119, self-tying via projections (347,635 more appropriate)	O'BRIEN, John	Insulator	William Brookfield
U	317,479	May 5, 1885	Insulator for Electric Wires Insulator with corrugations (vertical) inside skirt	WRIGHT, William H.	Insulator
U	324,957	August 25, 1885	Telegraph Insulator Insulator (glass) screwed into crossarm	PUTNAM, Jacob D.	Insulator
		1886
U	347,635	August 17, 1886	Telegraph Insulator CD 119, self-tying with fingers (should use instead of 316,812)	O'BRIEN, John	Insulator	William Brookfield
U	353,120	November 23, 1886	Insulator CD 187, U-81 & U-82, duplex insulator for underside of crossarm	BROWN, Robert G.	Insulator	E. S. Greeley & Co.
		1889
U	402,752	May 7, 1889	Insulator CD 289.9 (CD 1182), under crossarm type with triple petticoat	LOCKE, Fred M. LAPP, John	Insulator
		1890
U	427,296	May 6, 1890	Insulator CD 141.8 and CD 1037, self-tying with tapered pin hole & clamping flange	BUZBY, Joseph F.	Insulator
U	430,296	June 17, 1890	Insulator CD 257, CD 259, CD 263, dove-tail ears on crown - helmet. Patent is also found on New Lexington porcelain insulators M-3890 and M-4325A.	OAKMAN, Samuel	Insulator
U	434,879	August 19, 1890	Electric Insulator CD 144.5 and CD 260, ridges around inner surface of skirt	OAKMAN, Samuel	Insulator
U	443,187	December 23, 1890	Electric Insulator CD 144, ridges around outside of skirt to break water film	BAIN, Foree	Insulator
		1891
U	445,969	February 10, 1891	Electric Insulator Round insulator mounted on top of crossarm with two screws and surrounded with a rubber tube. Conductor is supported on top and secured with a metal clip.	BRANCH, James R.	Insulator
U	451,950	May 12, 1891	Electric Insulator CD 262, CD 263, CD 264, eyes for tie wire	OAKMAN, Samuel	Insulator
		1892
U	476,813	June 14, 1892	Porcelain Insulator U-141, pin type insulator with cemented metal thimble. Patent was owned by Pass & Seymour.	PASS, James SEYMOUR, Albert P.	Insulator
U	481,132	August 16, 1892	Insulator Device and insulator for suspending wires using one or more insulators encased in a metal sphere with wire suspended by means of a bolt or hook set in the center of the two halves of the spherical insulator (see 286,681)	BOWEN, William J.	Insulator	William Hubbard
U	484,209	October 11, 1892	Insulator CD 285 ""Edison"" - rainshed type for under crossarm	LOCKE, Fred M.	Insulator
		1893
U	490,560	January 24, 1893	Insulator Self-tying screw top	HAUTY, Auguste J.	Insulator	1/3 to John Burke
U	496,081	April 25, 1893	Insulator Insulator mounted in a slot in the crossarm and secured with a hinged latching cover	WRIGHT, Joseph F.	Insulator
U	504,059	August 29, 1893	Insulator CD 141.6, bail type clamping lever to hold line wire	BLACKBURN, George W.	Insulator
		1894
U	517,634	April 3, 1894	Pin for Insulators Pin for use with oil cup, CD 244 (see 524,659)	WINSLOW, George H.	Insulator
U	520,367	May 22, 1894	Insulator Transposition insulator CD 204 & U-192A	LOCKE, Fred M.	Insulator	1/2 to G. Paddock & W. Page
		1895
U	545,819	September 3, 1895	Electric Insulator CD 268, hole through crown for tie wire	ROTHENBERGER, Daniel M.	Insulator	2/3 to C. Inglis & E. Reilly
		1896
U	557,881	April 7, 1896	Insulator CD 134.6 bail wire system double-groove insulator (Cosner specimen)	RAPPLEYE, Hannibal W.	Insulator
U	562,166	June 16, 1896	Insulator Glass insulator with side conductor groove, threaded mounting pin, and hexagonal head to turn the insulator with a wrench for mounting in a wooden crossarm. A metal reinforcing pin is molded in the threaded end. (see patent gb1896-0019650)	BLANKINSOP, Thomas BROWN, Joseph W.	Insulator
U	572,438	December 1, 1896	Cell or Box for Electric Batteries (Gould battery rests: CD 20, CD 25, CD 50, CD 51) also patents England: 10,463 (5-30-1894); Germany: 85,828 (3-26-1895)	MOFFAT, John Miles	Insulator
U	573,092	December 15, 1896	Insulator Insulator of two materials combined	LOCKE, Fred M.	Insulator
		1897
U	590,806	September 28, 1897	Insulator U-937, eave trough above crossarm	LOCKE, Fred M.	Insulator
		1898
U	600,475	March 8, 1898	Electrical Insulator and Method of Making Same Multiple thin porcelain shells fused together with glaze, ""glaze-filling"" method, U-928 & U-928A. (see patent 601,195) (see patent gb1898-0006235) Patent was owned by the R. Thomas & Sons Co.	BOCH, John W.	Insulator
U	601,195	March 22, 1898	High Potential Insulator Inner skirt extending down to the crossarm or through the crossarm to prevent arcing from the petticoat edges to the pin, U-944. (see patent 600,475) (see patent gb1898-0006235)	BOCH, John W.	Insulator	The R. Thomas & Sons Co.
U	605,109	June 7, 1898	Insulator Insulator with sleeve to protect pin	LOCKE, Fred M.	Insulator
U	605,256	June 7, 1898	Insulator CD 288, U-938 & U-945	MERSHON, Ralph D.	Insulator
		1899
U	633,173	September 19, 1899	Insulator CD 121 and CD 143 with external projections to absorb mechanical shock - horizontal ridges	WITHYCOMBE, Frederick H.	Insulator	11/20 to Clement H. McLeod
U	633,174	September 19, 1899	Insulator CD 121 and CD 143 with external projections to absorb mechanical shock - spiral ridges	WITHYCOMBE, Frederick H.	Insulator	11/20 to Clement H. McLeod
U	633,175	September 19, 1899	Insulator CD 121 and CD 143 with external projections to absorb mechanical shock - projections	WITHYCOMBE, Frederick H.	Insulator	11/20 to Clement H. McLeod
U	633,176	September 19, 1899	Insulator CD 121 and CD 143 with external depressions to absorb mechanical shock	WITHYCOMBE, Frederick H.	Insulator	11/20 to Clement H. McLeod
U	634,568	October 10, 1899	Insulating Support for Electric Wires CD 309, U-416, under-crossarm type for better protection from rain	BEAL, Carroll N.	Insulator
U	637,282	November 21, 1899	Electric Insulator Tube of asbestos to lead conductor through a wall is made water tight (see 608,906) (see 615,896)	POCHE, Joseph Arthur	Insulator
		1900
U	664,301	December 18, 1900	Insulator M-2795, top is flattened cone with vertical flange & detachable spout	STERLING, Richard H.	Insulator	The Stanley Electric Mfg. Co.
U	664,432	December 25, 1900	Insulator CD 207? (see 726,846)	RENAULT, Edward	Insulator
		1901
U	666,586	January 22, 1901	Insulator Insulator & crossarm (glass) reinforced with embedded metal wires	WOOLBERT, Henry W.	Insulator
U	676,881	June 25, 1901	Self-Locking Insulator and Pin U-376, U-376A, U-376B, U-376C, U-376D	ETHERIDGE, Harry	Insulator
U	686,609	November 12, 1901	Insulating Support for Electric Wires CD 309.5, Telluride ""Type B"" under-hung combined insulators	HEMINGRAY, Ralph G.	Insulator
U	689,171	December 17, 1901	Insulator Insulators (2) with one pinhole	DUFFY, John F. HERSHEY, Henry B.	Insulator
U	689,218	December 17, 1901	Electrical Insulator Pin sleeve (see design 34,211 for U-966)	PARKS, Albert F.	Insulator	Lewis Stillwell
		1902
U	700,463	May 20, 1902	Insulator for Electric Circuits CD 301, CD 321 & U-938 (Strengthening ribs skirt to petticoat)	WALTHER, William J.	Insulator
U	701,847	June 10, 1902	Insulator CD 317.8, CD 313 & CD 313.1 stacking glass sections	CONVERSE, Vernon G.	Insulator	Hemingray ????
		1903
U	724,848	April 7, 1903	Insulator CD 159, wire groove with flat surface for line wire	GREGORY, Ferdinand W.	Insulator
U	726,846	May 5, 1903	Insulator for Electric Wires U-181 & CD 207 (sim) self-tying screw top (see 664,432)	BELL, Joseph R.	Insulator
U	728,805	May 19, 1903	Insulator M-2335, M-2785, M-2795 & M-2796 with eave drain & spout (see 664,301)	LOCKE, Fred M.	Insulator
U	735,212	August 4, 1903	Insulator CD 317.7, insulator with glass sleeve (CD 314)	CONVERSE, Vernon G.	Insulator
U	744,631	November 17, 1903	Insulator CD 139 combination safety and CD 181.5	SCHOENTHALER, Edward F.	Insulator	2/3 to W. Parker & J. Finn
U	745,284	November 24, 1903	Insulator Glazewelding (Boch variation) shells fused together to leave air space, U-926A	LOCKE, Fred M.	Insulator
		1904
U	758,175	April 26, 1904	Insulator CD 1038 tree hanger	CUTTER, Scott C.	Insulator
U	761,102	May 31, 1904	Insulator Insulator for carrying heavy cables composed of cap over the top to surround the conductor to prevent sparking and electrical leakage	RANDOLPH, Leonard M.	Insulator
U	761,760	June 7, 1904	Insulator Multipart lily shell design (M-3740)	CHESNEY, Cummings C.	Insulator	Stanley Electric Mfg. Co.
		1905
U	782,000	February 7, 1905	Glass Mold Mold specially designed to make the Buzby insulator CD 141.8	BUZBY, Joseph F.	Insulator
U	797,050	August 15, 1905	Insulator Insulator, split and threaded to screw into hole in crossarm to hold wire	DUNSMORE, William W.	Insulator
U	798,235	August 29, 1905	Insulator CD 141.7	TWIGGS, William R.	Insulator
U	799,726	September 19, 1905	Insulator Insulator, split and threaded to screw into hole in crossarm to hold wire	FOREMAN, Ernest Jay	Insulator
		1906
U	823,912	June 19, 1906	Insulator Cylindrical insulator with hole for line wire and hole for tie wire mounted in hole in crossarm and secured with cover over top of crossarm	BIELE, August	Insulator
U	838,163	December 11, 1906	High Tension Insulator Multipart with multiple petticoats under skirts (M-4325C, M-4415, M-4600) (see ID 5166)	BAUM, Frank G.	Insulator
U	838,482	December 11, 1906	Insulator for Line Conductors Insulator formed with recesses for pipe pin and metal insert crown	WEED, James Murray	Insulator
		1907
U	843,739	February 12, 1907	Electric Insulator Insulator used on trolley arms to support carrier wire that fits inside a metal case in the support crossarm	FEIGERT, Frederick A.	Insulator
U	851,222	April 23, 1907	Insulator Clamp Clamping device to hold conductor cable in crown groove (used on M-3740)	CLARK, Walter G.	Insulator	The Clark Electric & Mfg. Co.
U	852,730	May 7, 1907	Insulator U-957, broad skirt extending to crossarm with small threaded porcelain thimble	LOCKE, Fred M.	Insulator
U	867,901	October 8, 1907	Insulator CD 110, CD 147 & CD 150 spiral extension above wire groove to facilitate removing or installing the insulator without the need to remove the tie-wire.	BARCLAY, John C.	Insulator
U	872,569	December 3, 1907	System of Insulation for High Voltage Electric Conductors Insulator system for high voltage conductors	LOCKE, Fred M.	Insulator
		1908
U	881,967	March 17, 1908	Electric Insulator U-185	SLUSSER, Charles R.	Insulator
U	882,803	March 24, 1908	Insulator CD 211	STORROR, Leonard W.	Insulator
U	888,616	May 26, 1908	Insulator CD 109.7 self-tying with fingers	JOHNSON, Chauncey C.	Insulator	45/100 to John Watson
U	893,285	July 14, 1908	Electric Cable Insulator Terminal insulator providing a tight seal between conductor running down through the center of the insulator	TOMPKINS, Edward M.	Insulator
U	894,616	July 28, 1908	Insulator and Wire Clamp U-401 and U-401A, insulator & wire clamp	FAY, John L.	Insulator
U	905,141	December 1, 1908	Insulator Strain similar to CD 1130, CD 1131, CD 1138, CD 1140, CD 1142 but with intersecting grooves	BOGUE, Lawrence L.	Insulator
		1909
U	917,031	April 6, 1909	Insulator for High Tension transmission lines Insulator with weakening grooves in top skirt	EVELETH, Charles E.	Insulator	General Electric Co.
U	918,339	April 13, 1909	System for Insulation for High voltage Electric Conductors Insulator multiples	LOCKE, Fred M.	Insulator
U	929,878	August 3, 1909	Insulator U-183	RANSON, Joseph W.	Insulator
U	942,086	December 7, 1909	Support and Insulator Complicated insulator made of two plates of glass secured in a wooden box	LINDSAY, Edward F.	Insulator
		1910
U	971,785	October 4, 1910	Tree Insulator U-187	PIERCE, Alfred L.	Insulator	1/2 to Spalding K. Long
U	972,994	October 18, 1910	Insulator Insulator base curve to fit flush with matching curved top of crossarm	CAMPBELL, John H.	Insulator
		1912
U	1,022,993	April 9, 1912	Insulator Insulator with external threads to be screwed into metal shield and entire unit screwed into underside of the crossarm	WILLIS, George W.	Insulator
		1914
U	1,102,656	July 7, 1914	Insulator Insulator with hole in center and method to clamp conductor securely and the metal bracket with two bolts to secure the insulator	HADEN, Robert B.	Insulator
U	1,107,111	August 11, 1914	Insulator U-186	PURKEY, Benjamin S.	Insulator
		1915
U	1,127,474	February 9, 1915	Insulator Support Glass insulator with tapered pin base that fits inside the insulator to secure the wire which passes through a vertical slot in the sides of insulator and wedged between the base and insulator held together by a bolt that runs through the insulator and angle-iron crossarm	MARDOCK, Guy	Insulator
U	1,140,050	May 18, 1915	Insulator U-189 & U-189A, CD 175.5 The insulator was designed to support the power line to street lights. Only pieces of a specimen have been found. (see 1,101,802)	MANWARING, Robert A. HESSEL, James T.	Insulator
		1916
U	1,174,287	March 7, 1916	Insulator Support Pin - hollow metal & bolted to crossarm for CD 257	ROSENFELD, Mortimer C.	Insulator
		1917
U	1,215,883	February 13, 1917	Crosstree for Telegraph Poles Large blocks of wood securing in between the blocks halves of a stone or porcelain insulator mounted on a crossarm to secure the wire	SIMPSON, John Stewart	Insulator
U	1,229,272	June 12, 1917	Insulator CD 210 with top saddle groove (see 954,350)	IRWIN, John J.	Insulator
U	1,230,521	June 19, 1917	Bracket Tree insulator similar to the Cutter CD 1038 except with diagonal slot to secure wire, two holes for nails and two holes for tying to tree limbs	ROSS, George	Insulator
		1919
U	1,305,168	May 27, 1919	Insulator U-124A/B, U-182A/B self-tying screw top similar to Prenzel patent 315,660	ROBERTS, Omer L.	Insulator
		1926
U	1,574,964	March 2, 1926	Insulation Equipment Special insulator design for bus bar and equipment support (see 1,274,555 and 1,663,007)	GETTS, Frank E.	Insulator	Electrical Engineers Equipment Co.
		1927
U	1,620,804	March 15, 1927	Insulator Tree insulator bracket for CD 1038 (see 1,721,657)	CUTTER, Scott C.	Insulator
		1928
U	1,687,495	October 16, 1928	Insulator Transposition (1-piece) for telephone line shaped like CD 194.5, CD 195.5	GORDON, Chester S. LOWE, James T.	Insulator	American Telephone & Telegraph Co.
		1929
U	1,701,562	February 12, 1929	Insulator CD 122.4, CD 128, CD 142, CD 194.5, CD 195.5 with threads inside skirt	GORDON, Chester S.	Insulator	American Telephone & Telegraph Co.
U	1,702,235	February 12, 1929	System of Line Insulation and Insulators Therefor Odd Electrose insulator	STEINBERGER, Louis	Insulator
U	1,703,853	February 26, 1929	Dry-Spot Insulator CD 182, U-173, U-174 & U-175 dry-spot	GOULD, Rufus	Insulator	1/2 to Postal Telegraph Cable Co.
U	1,708,038	April 9, 1929	Low Loss Insulator CD 176 (see June 1972 CJ p. 6)	WILSON, Leon T.	Insulator	American Telephone & Telegraph Co.
		1930
U	1,760,983	June 3, 1930	Insulator CD 194.5, CD 195.5 transposition	GORDON, Chester S. LOWE, James T.	Insulator	American Telephone & Telegraph Co.
		1931
U	1,819,302	August 18, 1931	Oil and Air Break Pothead Disconnect Pothead disconnect	RAH, Joseph	Insulator	G. & W. Electric Specialty Co.
		1934
U	1,955,609	April 17, 1934	Insulator U-856A fogbowl	ROWLAND, Davidge H.	Insulator	Locke Insulator Corp.
		1937
U	2,084,866	June 22, 1937	High Voltage Insulator U-796 styles and CD 221 Hi-Top design	PLIMPTON, Bentley A.	Insulator	Locke Insulator Corp.
U	2,088,433	July 27, 1937	Fog and Dust Insulator U-816 series	PLIMPTON, Bentley A.	Insulator	Locke Insulator Corp.
U	2,089,791	August 10, 1937	Method of Making Electrical Insulators CD 240.2, method of making insulator described in 2,191,152	HAMMEL, Victor F.	Insulator
U	2,099,540	November 16, 1937	Insulator Shield Metal skirt on CD 154	SMITH, Donald H.	Insulator	Western Union Telegraph Co.
		1939
U	2,142,422	January 3, 1939	Insulator and Method of Manufacturing the Same Method of making station post insulators with hollow cavity and filling cavity with dry gas	TAYLOR, John J.	Insulator	The Ohio Brass Co.
U	2,165,773	July 11, 1939	Insulator for Communication Systems CD 142, CD 142.4 - glass insert screwed in skirt with metallic iridizing	WHEEER, Herbert H. MCGINNIS, Orris	Insulator	Western Union Telegraph Co.
		1940
U	2,191,152	February 20, 1940	Electrical Insulator CD 240.2 with metal saddle embedded in crown for RFI (see 2,089,791)	HAMMEL, Victor F.	Insulator
U	2,194,189	March 19, 1940	Pole Line Insulator CD 142, CD 142.4 - tin & iron for iridized coating to reduce water adherence	WHEELER, Herbert H. MCGINNIS, Orris THORDARSON, William	Insulator	Western Union Telegraph Co.
		1941
U	2,234,391	March 11, 1941	Method of Manufacturing Electric Insulators Method of making station post insulators with metal caps	TAYLOR, John J.	Insulator	The Ohio Brass Co.
U	2,266,400	December 16, 1941	Insulator CD 216	REED, Frederick F.	Insulator
		1942
U	2,278,330	March 31, 1942	Multipost Line Insulator Two post insulators joined together with elongated metal bottom cap	MEYER, Edwin M.	Insulator	Porcelain Products, Inc.
		1943
U	2,317,799	April 27, 1943	Line Insulator Insulator composed of a metallic hollow shell coated with ceramic material	PERLES, Maurice	Insulator	Mycalex Corp. of America
U	2,336,864	December 14, 1943	Apparatus For Forming Insulators CD 1030: Wireholder made of glass, press for making the design	HOLMES, Minot K.	Insulator	Owens-Illinois Glass Co.
		1947
U	2,418,713	April 8, 1947	Thermally Toughened Insulator CD 228.5: tempering the surface of glass insulators for added strength	HOLMES, Minot K. PLUMMER, Jesse H.	Insulator	Owens-Illinois Glass Co.
		1956
U	2,734,098	February 7, 1956	Transposition Insulators CD 203.2 transposition - rainshed of elastic material between conductors	BONNESEN, Elmer J.	Insulator	American Telephone & Telegraph Co.

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