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Total of 95 patents found where: Class is '174'; Subclass is '211';

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T / S	Patent	Date	Description	Patentee	Category	Assigned To
		1851
U	8,418	October 14, 1851	Improvement in Insulators for Telegraph Wires Metal or cast iron insulator with cupped dry area at bottom. Glass poured in with a conductor supporting iron rod embedded in the glass, and the cupped is coated or lined with glass, porcelain, or enamel. The bottom skirt is slanted inward 45 degrees to prevent water from splashing up inside wetting the interior surface. This feature was utilized in U-983 and U-984 made by the U. S. Pottery Co. in Bennington, VT.	BATCHELDER, John M.	Metal
		1859
U	23,373	March 29, 1859	Improved Insulator for Lightning Rods Lightning rod insulator (glass) and bracket to hold rod	HICKOK, Russel	Lightning Rod Insulator
		1864
U	45,221	November 29, 1864	Improvement in Insulators for Telegraph Wires Hook cemented in glass with metal covering (see reissue 2,717 on 8-6-1867)	BROOKS, David	Hook
		1865
U	47,141	April 4, 1865	Improvement in Insulators for Telegraphs Bracket (wooden) with recessed bowl to hold ramshorn [Smithsonian]	VAN CHOATE, S. F.	Bracket
		1866
U	51,934	January 9, 1866	Improvement in Telegraph Insulators Hook with improved rubber cap and flared top	ELY, Alfred B.	Hook
U	52,761	February 20, 1866	Improvement in Telegraph Insulators Hook screwed into block of vulcanite	SMITH, William W.	Hook
U	53,246	March 13, 1866	Improvement in Telegraph Insulators Hook insulator	SMITH, William W.	Hook
U	53,426	March 27, 1866	Improvement in Telegraph Insulators Hook covered with rubber attached to rubber hollow ball chamber	ELY, Alfred B.	Hook
U	56,542	July 24, 1866	Improvement in Insulators for Telegraphs Hook to be inserted directly into pole or crossarm	ELY, Alfred B.	Hook
U	58,594	October 9, 1866	Improvement in Telegraph Insulators Hook with metal shell fastened at right angle to pole	BURNAP, William H. BRASSINGTON, John D.	Hook
		1869
R	3,499	June 8, 1869	Improvement in Telegraph Insulators Cup under insulator (similar to oil insulator) to maintain dry surfaces (see 71,418)	SIMONDS, W. Edgar	Cup
		1872
U	129,465	July 16, 1872	Improvement in Battery Insulators Battery insulator shaped to fit hole in table & flat to support battery	DAVIS, Augustus G.	Battery
		1878
U	201,615	March 26, 1878	Improvement in Insulators for Telegraph Wires Oil cup insulator	JOHNSON, Walter C. PHILLIPS, Samuel E.	Oil
		1879
U	216,138	June 3, 1879	Improvement in Telegraph Insulators Insulator suspended under crossarm by screw to hold wireholder	BLOOMFIELD, John H.	Insulator
		1883
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
		1885
U	330,173	November 10, 1885	Means for Supporting Electrical Wires Pin split with metal cap to hold wire	TRINGHAM, John Watson	Pin
		1886
U	346,971	August 10, 1886	Telegraph Insulator Spout each end of groove for rain; barbed top groove; hole for tie wire	WILSON, John	Spout
U	346,972	August 10, 1886	Telegraph Insulator Self-tying via bolt in crown	WILSON, John	Self-tying Miscellaneous
		1887
U	362,682	May 10, 1887	Loop Insulator Suspension or strain insulator with shield	SANDS, Horace Van	Suspension
		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	425,513	April 15, 1890	Insulator Rainshed (hood) over wire	KOOKOGEY, William P.	Rainshed	The Kookogey Electric Co.
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	461,631	October 20, 1891	Insulating Support for Electric Conductors Oil insulator	HEWETT, Robert J.	Oil
		1893
U	496,652	May 2, 1893	Insulator for Telegraph Wires Drip points Patent was owned by Hemingray Glass Co.	HEMINGRAY, Ralph G. GILL, James C.	Drip
		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	526,498	September 25, 1894	Conductor Support and Insulator Jeffrey Mine insulator (CD 185)	OSYOR, David N.	Mine	Joseph A. Jeffrey
		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
		1897
U	590,806	September 28, 1897	Insulator U-937, eave trough above crossarm	LOCKE, Fred M.	Insulator
		1898
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	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
		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.
		1901
U	667,882	February 12, 1901	Feeder Wire Insulator Mine insulator (similar to Sackett see 903,692) [CD 1025?]	KING, Charles K.	Mine
		1903
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
		1904
U	761,760	June 7, 1904	Insulator Multipart lily shell design (M-3740)	CHESNEY, Cummings C.	Insulator	Stanley Electric Mfg. Co.
U	767,948	August 16, 1904	Insulator Deadend insulator	LOCKE, Fred M.	Deadend
U	770,962	September 27, 1904	Insulator Self-tying groove top and screw wire clamp	GILL, Jacob F.	Self-tying Miscellaneous
		1905
U	783,230	February 21, 1905	Insulator Support Steel pin supporting Electrose cover composed of threads and gutter at the bottom for transmitting water away from pin	STEINBERGER, Louis	Pin
U	799,726	September 19, 1905	Insulator Insulator, split and threaded to screw into hole in crossarm to hold wire	FOREMAN, Ernest Jay	Insulator
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	823,820	June 19, 1906	Prong Insulator Ramshorn made of Electrose with lips and spout	STEINBERGER, Louis	Ramshorn
		1907
U	843,844	February 12, 1907	Third Rail Insulator Third rail insulator	REDMAYNE, Robert Norman	Third Rail
U	853,743	May 14, 1907	Insulating Device Pin made of Electrose with flange on bottom	STEINBERGER, Louis	Pin
U	855,355	May 28, 1907	High Potential Insulator Electrose multipart insulator for high voltages	STEINBERGER, Louis	Electrose
		1908
U	882,803	March 24, 1908	Insulator CD 211	STORROR, Leonard W.	Insulator
U	884,142	April 7, 1908	Insulator Cylindrical insulator with spiraling ribs to screw insulator into crossarm, center groove to hold line wire, external grooves to carry water away and drip points or serrations to allow water to drip down	FOREMAN, Ernest Jay	Crossarm
U	894,616	July 28, 1908	Insulator and Wire Clamp U-401 and U-401A, insulator & wire clamp	FAY, John L.	Insulator
		1909
U	912,501	February 16, 1909	High Tension Insulator Large covers for insulators to protect them from rain and thus reduce electrical leakage	SODEN, John K.	Miscellaneous
U	915,330	March 16, 1909	Insulator and Wire Clamp Self-tying twist lock type	BLACKBURN, Jasper	Self-tying Twist
U	930,750	August 10, 1909	Insulator Protective shield & splash preventor on pin under insulator	GRAHAM, Charles M.	Protective Shield
U	930,751	August 10, 1909	Reinforced Wooden Support for Insulators Splash preventor horizontal on pin under insulator	GRAHAM, Charles M.	Splash
U	937,140	October 19, 1909	Non-detachable Insulator Pin permanently fixed to the insulator via slotted pinhole	BARTLETT, Harry MACCALLUM, Alexander P.	Pin
		1910
U	961,646	June 14, 1910	Insulator Self-tying screw top with slotted top	REUSCH, William L.	Self-tying Screw Top
U	971,322	September 27, 1910	Mine Insulator Mine hanger insulator (see GB191027804)	SPEAKMAN, Charles W.	Mine
		1915
U	1,160,546	November 16, 1915	Disk Strain Insulator Suspension made of Electrose like fishtail Hewlett	STEINBERGER, Louis	Electrose
U	1,166,394	December 28, 1915	Spool Type Disk Strain Insulator Suspension composed of ribbed spools made of Electrose	STEINBERGER, Louis	Electrose
		1916
U	1,186,862	June 13, 1916	Insulator Knob	SWARTZ, Otto P.	Knob
		1917
U	1,216,000	February 13, 1917	Electrical Insulator Strain with drain holes	SCULLY, Thomas	Strain
		1924
U	1,505,730	August 19, 1924	Insulator and Support Therefor Wireholder with lag screw and metal bracket	ROCKWELL, Herbert O.	Wireholder	Brady Electric & Mfg. Co.
		1925
U	1,524,407	January 27, 1925	Insulator for Suspended High Tension Electric Wires Strain for horizontal with cupped ends with downward drip edges	RENAUDIN, Alfred	Strain
		1928
U	1,669,529	May 15, 1928	Insulator Suspension fog-type with wood strain insulator for connecting to another insulator	MILLER, Frederick H.	Suspension	Westinghouse Electric & Mfg. Co.
U	1,677,346	July 17, 1928	Insulator Fogbowl suspension	JACKSON, Ray P.	Fog Type	Westinghouse Electric & Mfg. Co.
		1929
U	1,701,561	February 12, 1929	Insulator CD 118; Carrier circuit insulator with metal cover screwed outside (internal threads)	GORDON, Chester S.	Carrier	American Telephone & Telegraph Co.
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	1,706,488	March 26, 1929	Insulator Fogbowl via metal pan under skirt	HAWLEY, Kent A.	Fog Type	Locke Insulator Corp.
		1930
U	1,748,884	February 25, 1930	Leakproof Insulator Bell shaped radio antenna insulator to protect wire from getting wet from rain or snow.	KITTS, David Roscoe	Antenna
		1931
U	1,811,530	June 23, 1931	Insulating Device Ribbed suspension insulator with deep hollow interior to receive linkage hardware to connect the next insulator	BAUM, Frank G.	Suspension	Westinghouse Electric & Mfg. Co.
		1932
U	1,854,459	April 19, 1932	Insulator Skirts upturned with drain holes	DIENNER, John A.	Skirt
U	1,869,397	August 2, 1932	Insulator Insulator with spiral or helical grooves to all rain to wash the surface better	STROUP, Charles L.	Spiral
		1933
U	1,894,292	January 17, 1933	Strain Insulator Helical strain insulator	CRAMER, Walter	Helical	Locke Insulator Corp.
U	1,896,937	February 7, 1933	Insulator Fog type suspension like a Hewlett but with the edges curved sharply upward	BRINEY, Perry G.	Fog
U	1,920,978	August 8, 1933	Insulator Clamp type with lag screw	FORT, Louis	Clamp Type
		1934
U	1,942,284	January 2, 1934	Electric Insulator Helical grooves on top surface of suspension insulator	HALTON, Geoffrey H.	Helical	Steatite & Porc. Prod. Ltd.
		1935
U	1,994,281	March 12, 1935	Insulator Fog type multipart & suspension insulator similar to oil types with inverted mating cup	LUSIGNAN, JR., Joseph T.	Fog Type	The Ohio Brass Co.
		1937
U	2,103,399	December 28, 1937	Insulator Fog type suspension with top curved down over bottom petticoat that extends up inside the top part	WALKER, Robert H.	Fog	The Ohio Brass Co.
		1938
U	2,135,359	November 1, 1938	Suspension Insulator Fog type suspension insulator	TAYLOR, John J. BOVARD, Floyd D.	Fog Type	The Ohio Brass Co.
		1939
U	2,155,848	April 25, 1939	Insulator Helical suspension & helical post type	TAYLOR, John J.	Helical	The Ohio Brass Co.
U	2,162,288	June 13, 1939	Insulator Suspension insulator with stepped rings to allow washing by rain and greater leakage length	TAYLOR, John J.	Suspension
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	2,194,189	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.
U	2,218,497	October 15, 1940	Electrical Insulator Rubber pin type insulator (see 2,304,483)	SMITH, Donald H. WHEELER, Herbert H.	Rubber	Western Union Telegraph Co.
		1942
U	2,292,248	August 4, 1942	Bushing Bushing composed of several parts with open chambers	STEVENS, Leland J.	Bushing	Locke Insulator Corp.
U	2,304,483	December 8, 1942	Electrical Insulator Rubber pin type insulator	SMITH, Donald H. WHEELER, Herbert H.	Rubber	Western Union Telegraph Co.
		1946
U	2,406,095	August 20, 1946	Insulator Dry-spot	MATHEWS, Martin D.	Dry-spot
		1948
U	2,442,165	May 25, 1948	Insulator Odd under crossarm insulator with diagonal slot to insert wire into center slot and means to nail the insulator to the crossarm	GEROW, Kenneth Norris	Miscellaneous
		1954
U	2,688,654	September 7, 1954	Insulator for Fence Posts Knob for electric fence.	BUSSMANN, JR., Aloysius B.	Knob
		1957
U	2,776,332	January 1, 1957	Self-Cleaning Outdoor High Tension Insulators Spiral or helical side petticoats that are washed by rain	VON CRON, Hans	Spiral	Siemens-Schuckertwerke Aktiengesellschaft
		1960
U	2,947,801	August 2, 1960	Contamination and Moisture Resistant Insulator A conductive coating used to generate heat to keep surface of the insulator dry	DOOLITTLE, Fred B.	Fog
		1962
U	3,061,667	October 30, 1962	Telegraph Pole Line Insulator Rubber pin type insulator (Brown p. 91)	MARKLEY, William F. SLATER, James L.	Rubber	Western Union Telegraph Co.
		1974
U	3,836,705	September 17, 1974	Electrical Insulator and Conducting Tar Therefore RFI prevention using conductive tar to coat insulator and metal surfaces for cementing	ROSENBLATT, Gordon	RFI	Canadian Porcelain Co.
		1984
U	4,443,659	April 17, 1984	Glaze to Pin Connection for an Electrical Insulator with Embedded Metal Fitting Suspension with semi-conducting glaze & conducting coating on cement	TATEM, William A.	Suspension	Interpace Corp.
		1985
U	4,559,414	December 17, 1985	Electrolytic Corrosion Resistant Insulator Suspension insulator that is corrosion resistant	KITO, Kuniji WATANABE, Akihiro	Suspension	NGK Insulators, Ltd.
		1989
U	4,814,551	March 21, 1989	Anticorrosive Insulator Suspension (anticorrosive), cementing metal cap for DC service (Japan)	WATANABE, Akihiro MORI, Shigeo	Suspension	NGK Insulators, Ltd.

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