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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 = '140C') ORDER BY date ASC, patent, type

Total of 42 patents found where: Class is '174'; Subclass is '140C';

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T / S Patent Date Description Patentee Category Assigned To
 1919
U 1,290,673 January 7, 1919 Sectional Pin Insulator
Multipart with sections screwed together with threaded metal bands		 SONNEBORN, Sol S.
 Multipart  
 1921
U Specimen known 1,374,998 April 19, 1921 Insulator
Multipart porcelain insulator of Faradoid design (spelling for other patents: GILCHREST, George Irving)		 FORTESCUE, Charles Le G.
GILCHREST, George I.
 Multipart Westinghouse Electric & Mfg. Co.
 1922
U 1,426,421 August 22, 1922 Condenser Cemented Sectional Insulator
Multipart using metallic cement and metal sheath covering skirts		 SONNEBORN, Sol S.
 Multipart Hopewell Insulation & Mfg. Co.
 1924
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.
 1925
U 1,521,743 January 6, 1925 Insulator
Suspension arcing horn system and insulator (see 1,552,664 and 1,783,271)		 AUSTIN, Arthur O.
 Suspension The Ohio Brass Co.
U 1,536,749 May 5, 1925 Insulator
Multipart (RFI) with sanded, metal coated groove & cement (see 1,284,975)		 AUSTIN, Arthur O.
 Multipart The Ohio Brass Co.
 1928
U 1,661,823 March 6, 1928 Insulator
Suspension string with insulators having conducting surface to balance electrical field		 HAWLEY, Kent A.
 Suspension Locke Insulator Corp.
 1929
U Specimen known 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 1,728,522 September 17, 1929 Insulator for High Voltage Systems
Suspension disk with strips of high resistance conductive material embedded in the upper surface to produce a uniform distribution of voltage across each disk in a string		 BAUM, Frank G.
 Suspension Westinghouse Electric & Mfg. 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.
U 1,735,829 November 12, 1929 Means and Method for Controlling Surface Resistance of Insulators
RFI coating on suspension insulators with graded or reduced thickness away from the center of the disk		 AUSTIN, Arthur O.
 RFI The Ohio Brass Co.
 1932
U 1,872,557 August 16, 1932 Article of Manufacture
RFI metal coating around the crown of an insulator so the tie-wire and conductor can be soldered to the coating		 BARROW, George M.
 RFI Westinghouse Electric & Mfg. Co.
U 1,873,750 August 23, 1932 Insulator Structure
Strain insulator with parts coated and metal fitting soldered to the coating		 FORTESCUE, Charles Le G.
 Strain Westinghouse Electric & Mfg. Co.
 1934
U 1,953,025 March 27, 1934 Corona Shield
Corona shield in the form of a metal band that fits around the tie-wire groove		 ROWLAND, Davidge H.
 Corona Locke Insulator Corp.
U 1,967,616 July 24, 1934 Insulator
Tie wire for high voltage multipart pintype insulators using a conductive sleeve between conductor and insulator with tie wire wrapped around the sleeve		 HILLEBRAND, William A.
 Tie Wire The Ohio Brass Co.
U 1,973,076 September 11, 1934 Insulator
RFI: coat crown with gold, platinum, bismuth & semi-conductive area		 HUNT, Marsden H.
 RFI Westinghouse Electric & Mfg. Co.
U 1,983,569 December 11, 1934 Pedestal Switch Insulator
Pedestal insulator to support switch gear or bus bar		 ROWLAND, Davidge H.
 Pedestal Locke Insulator Corp.
 1935
U 1,987,683 January 15, 1935 Insulator
RFI: coat crown with copper glaze to prevent AM radio interference		 HUNT, Marsden H.
BARROW, George M.
 RFI Westinghouse Electric & Mfg. Co.
U Specimen known 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.
U Specimen known 1,994,282 March 12, 1935 Fog Type Insulator
Fog type suspension similar to oil reservoir types with inverted mating cup		 LUSIGNAN, JR., Joseph T.
 Fog Type The Ohio Brass Co.
U 1,997,666 April 16, 1935 Insulator
RFI multipart design with metal cap over crown with extension over coated area of top shell and metallic coating on each shell below cement joint		 WHISLER, George M.
 RFI Westinghouse Electric & Mfg. Co.
U 1,997,688 April 16, 1935 Insulator
RFI: coat crown with copper glaze to prevent radio interference		 HUNT, Marsden H.
BARROW, George M.
 RFI Westinghouse Electric & Mfg. Co.
U 2,011,136 August 13, 1935 Protective Apparatus
Arcing gap using flux control insulators		 AUSTIN, Arthur O.
 Arc Gap The Ohio Brass Co.
U 2,023,808 December 10, 1935 Shielded Cemented Type Insulator
Suspension cementing procedure using metal cap (disc, J-D type & bus)		 HAWLEY, Kent A.
 Suspension Locke Insulator Corp.
 1937
U 2,081,508 May 25, 1937 Insulator Having High Surface Resistance and Method of Making It
RFI: carnival coating (stain) to increase surface resistance and for marker insulator		 SHAVER, William W.
 RFI Corning Glass Works
 1938
U Specimen known 2,118,795 May 24, 1938 Insulator
RFI: tin iridized coating to reduce water adherence, radio interference, and reflect sun		 LITTLETON, Jesse T.
 RFI Corning Glass Works
U Specimen known 2,133,768 October 18, 1938 Insulator
RFI: non-conducting iron iridized coating over tin iridized coating (see 2,118,795)		 HOSTETTER, John C.
LITTLETON, Jesse T.
 RFI Corning Glass Works
U 2,135,362 November 1, 1938 Insulator
Fog type suspension insulator		 TAYLOR, John J.
 Fog Type The Ohio Brass Co.
 1939
U 2,154,387 April 11, 1939 Electric Insulator
RFI: coat crown with metallic glaze to prevent radio interference (advertised in Electrical World 8-12-1939)		 SLEEMAN, Harold P.
 RFI The R. Thomas & Sons Co.
U Specimen known 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.
 1941
U 2,239,809 April 29, 1941 Insulator
Suspension insulator and method of applying RFI coating		 BURLESON, Wade H.
 RFI The Ohio Brass Co.
 1942
U 2,274,955 March 3, 1942 High Tension Electric Insulator and Method of Coating Same
RFI: antimony coated top		 DYKSTRA, Laurence J.
MEYER, Edwin M.
 RFI Victor Insulators, Inc.
U 2,275,208 March 3, 1942 Electrical Insulator
Method of applying RFI coating to suspension disk (see 1,661,823) (see 1,735,829) (see 2,154,387)		 TAYLOR, John J.
 RFI/suspension The Ohio Brass Co.
U 2,281,173 April 28, 1942 Insulator and Method of Producing Conducting Coating Thereon
RFI prevention using an inexpensive glaze coating		 SANTOMIERI, Sebastian L.
 RFI Victor Insulators, Inc.
U 2,283,685 May 19, 1942 High Resistance Conducting Coating for Electric Insulators
RFI coating to prevent radio interference		 MCCREERY, George L.
CAMPBELL, Van E.
 RFI The Ohio Brass Co.
 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  
 1966
U 3,243,505 March 29, 1966 Insulator Having Semi-Conductive Layers to Increase the Capacitance Thereof
Fog type suspension with conductive layers on top and bottom of disk		 CLARK, Colin H. W.
 Fog Steatite and Porcelain Products, LTD.
 1968
U 3,368,026 February 6, 1968 Electrical Insulator Having Improved Surface Electrical Stress Distribution
RFI prevention using two glaze coatings on suspension insulators		 VINCE, Patrick Michael
 RFI Doulton & Co., Ltd.
 1972
U 3,658,583 April 25, 1972 Method for Producing Semi-Conducting Glaze Compositions for Electric Insulators
RFI semi-conductive glaze formulas		 OGAWA, Yutaka
 RFI NGK Insulators, Ltd.
 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.
U 4,465,900 August 14, 1984 High Voltage Glazed Porcelain Insulators
Porcelain insulator and glaze designed specifically for DC service		 SEIKE, Shoji
MITSUMATSU, Yoshio
 Porcelain NGK Insulators, Ltd.

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