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SELECT DISTINCT patent.*, YEAR(date) as year FROM patent LEFT JOIN category ON category.patent = patent.patent AND category.type = patent.type WHERE (category.class = '174') AND (category.subclass = '30') ORDER BY date ASC, patent, type

Total of 48 patents found where: Class is '174'; Subclass is '30';

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T / S Patent Date Description Patentee Category Assigned To
 1865
U 49,482 August 15, 1865 Improvement in Insulators for Telegraph Wires
Hook encased in insulating material with metal covering with dead air space		 WARD, Henry H.
 Hook S. F. Van Choate & Stuart Gwynne
 1867
U 71,418 November 26, 1867 Improvement in Telegraph Insulators
Cup under insulator (similar to oil insulator) to maintain dry surfaces (see reissue 3,499 on 6-8-1869) Patent was used by Central Electric Co.		 SIMONDS, W. Edgar
 Oil  
 1869
U 92,111 June 29, 1869 Improvement in Telegraph Insulators
Hook with paraffin in a cup between hook or insulator and pin		 SIMONDS, W. Edgar
 Hook  
 1873
U 136,191 February 25, 1873 Improvement in Insulators for Battery Cups
Battery insulator cup to collect moisture or acid		 THOMAS, James H.
 Battery 1/2 to A. G. Tomay
 1878
U Specimen known 201,615 March 26, 1878 Improvement in Insulators for Telegraph Wires
Oil cup insulator		 JOHNSON, Walter C.
PHILLIPS, Samuel E.
 Oil  
 1887
U 360,354 March 29, 1887 Insulator
Acoustic insulator to reduce vibration of telephone wires in acoustic or mechanical telephones		 LOCKE, Willie F.
 Acoustic 1/2 to John E. Robertson
 1890
U Specimen known 438,532 October 14, 1890 Insulating Appliance for Electric Batteries
Battery jar and large battery rest insulator with upturned cup to hold insulating fluid. Some think the rods (a2) that hold the plates apart are the glass U-shaped ""rods"" known in the hobby, but there is no evidence of this in the patent.		 CURRIE, Stanley C. C.
 Battery The United Gas Improvement Co.
 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  
U 461,631 October 20, 1891 Insulating Support for Electric Conductors
Oil insulator		 HEWETT, Robert J.
 Oil  
 1893
U 506,002 October 3, 1893 Insulating Support for Metallic Circuits
Oil cup insulator to support short crossarm for two insulators		 COUSENS, Alfred C.
 Oil Charles Stone
 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 519,446 May 8, 1894 Trolley Wire Hanger
Glass oil insulator used in trolley wire hanger		 CROUNSE, Albert B.
RUTLEDGE, Charles A.
 Oil  
U Specimen known 524,659 August 14, 1894 Insulator
Oil cup with means to support the cup from the insulator (see 517,634)		 WINSLOW, George H.
 Oil  
 1902
U 696,958 April 8, 1902 Insulator for High Potential Currents
Glazeweld technique using thin layer at joint with air space between shells		 GAERTNER, Rudolf
 Glazeweld Karlsbader Kaolin-Industrie-Gesellschaft
 1903
U Specimen known 745,284 November 24, 1903 Insulator
Glazewelding (Boch variation) shells fused together to leave air space, U-926A		 LOCKE, Fred M.
 Insulator  
 1905
U 796,977 August 8, 1905 Insulator Pin
Pin		 LOCKE, Fred M.
 Pin  
 1906
U 839,666 December 25, 1906 Built up Insulator
Oil used in hidden reservoir of multipart insulator made of Electrose		 STEINBERGER, Louis
 Oil  
 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  
 1910
U 974,672 November 1, 1910 Insulator
Suspension insulator		 JOHNSTON, Robert M.
 Suspension The Ohio Brass Co.
 1912
U 1,034,394 July 30, 1912 Insulating Support for Storage Battery Tanks
CD 35, CD 36; Battery insulator with soft metal cap		 MORRIS, George H.
 Battery The Electric Storage Battery Co.
 1914
U 1,093,479 April 14, 1914 Insulator
Multipart using interchangeable shells cemented to leave air pocket		 SANFORD, JR., Joseph A.
 Multipart The R. Thomas & Sons Co.
U 1,093,480 April 14, 1914 Insulator
Multipart same as 1,093,479 with plug to block cement from air pocket		 SANFORD, JR., Joseph A.
 Multipart The R. Thomas & Sons Co.
U 1,097,392 May 19, 1914 Battery Box Support and Insulator
Battery rest insulator with screw to hold under foot of table		 CREMER, August C.
MOLANDER, Gustaf F.
 Battery  
U 1,122,326 December 29, 1914 High Potential Insulator
Multipart insulator made of Electrose		 STEINBERGER, Louis
 Multipart  
 1915
U 1,146,298 July 13, 1915 Insulating Support for Storage Batteries
CD 35, CD 36; Battery insulator with a lead cup sitting on an earthenware pedestal cup (see 1,181,362)		 AMBRUSTER, Cornelius
 Battery  
 1916
U 1,179,395 April 18, 1916 Insulating Support for Storage Battery Tanks
Battery support insulator with lead cup underneath		 BECK, Harold M.
 Battery  
U Specimen known 1,190,766 July 11, 1916 Insulating Support
Battery support insulator		 HUBBARD, Albert S.
 Battery Gould Storage Battery Co.
U 1,191,186 July 18, 1916 Insulator
Multipart insulator composed of easily assembled identical shells		 JACKSON, Ray P.
 Multipart Westinghouse Electric & Mfg. Co.
 1924
U 1,497,319 June 10, 1924 Insulator
Improved construction of a high tension strain insulator for long spans		 AUSTIN, Arthur O.
 Strain The Ohio Brass Co.
U 1,516,585 November 25, 1924 Insulator
Cylindrical strain insulator with ribs and metal caps on the ends		 AUSTIN, Arthur O.
 Strain The Ohio Brass Co.
 1927
U 1,621,246 March 15, 1927 Insulator
High tension insulator made of parts with metal plates bolted to upper and lower surface or suspension disks bolted together		 GODDARD, Walter T.
 Multipart Locke Insulator Corp.
U 1,625,601 April 19, 1927 Insulator
Suspension insulator made of multiple sections that are clamped together in the field		 GODDARD, Walter T.
 Suspension Locke Insulator Corp.
U 1,628,241 May 10, 1927 Insulator
Post type insulator composed of multiple parts		 GODDARD, Walter T.
 Post Type Locke Insulator Corp.
 1928
U Specimen known 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 1,702,235 February 12, 1929 System of Line Insulation and Insulators Therefor
Odd Electrose insulator		 STEINBERGER, Louis
 Insulator  
U Specimen known 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.
U 1,735,560 November 12, 1929 Insulator for Withstanding Fog Conditions
Multipart porcelain insulator with heating elements embedded in the surface to keep surface of insulator dry during fog		 AUSTIN, Arthur O.
 Fog Type The Ohio Brass Co.
 1930
U Specimen known 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.
U 1,782,790 November 25, 1930 Insulator
Strain insulator composed of a wooden strain sealed inside porcelain tubular shell that is filled with non-conducting oil		 MILLER, Frederic H.
JACKSON, Ray P.
 Strain Westinghouse Electric & Mfg. Co.
 1932
U 1,861,316 May 31, 1932 Insulator
Suspension (Hewlett type) with oil reservoir		 MONTANDON, Arthur
 Suspension 1/2 to Societe Gen. D'Entr.
 1934
U 1,944,383 January 23, 1934 Oil Bath Insulator
Oil type insulator using oil cup attached to edge of insulator and protective cover attached to prevent contamination from fog or rain		 WEILL, Robert
 Oil  
U Specimen known 1,955,609 April 17, 1934 Insulator
U-856A fogbowl		 ROWLAND, Davidge H.
 Insulator Locke Insulator Corp.
U 1,967,654 July 24, 1934 Insulator
Fog type multipart & suspension insulator with porous coating, wire screen for RFI		 AUSTIN, Arthur O.
 Fog Type The Ohio Brass 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.
 1940
U 2,224,853 December 17, 1940 Method of Manufacturing Ceramic of Vitreous Ware
Manufacturing method to improve quality of porcelain during firing		 AUSTIN, Arthur O.
 Manufacturing The Ohio Brass 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 2,264,428 December 2, 1941 Article of Ceramic of Vitreous Material
Manufacturing method to improve quality of porcelain during firing		 AUSTIN, Arthur O.
 Manufacturing The Ohio Brass Co.
 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

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