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:
Year between: and
Patentee starting with:
Assigned To starting with:
Description containing:
Class:    Subclass:
Click Search when complete:
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 = '200') ORDER BY date ASC, patent, type

Total of 22 patents found where: Class is '200';

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
U 391,512 October 23, 1888 Electric Switch
Wooden switch (Brown p. 21)
U 414,943 November 12, 1889 Method of Utilizing Natural Electric Energy
Method of capturing electric energy from lightning rods and storing in a battery
DEWEY, Mark W.
Lightning Energy The Dewey Corp.
U 483,862 October 4, 1892 Electric Switch
Porcelain electric switch
PAISTE, Harry T.
U 851,705 April 30, 1907 Insulator
Roof entry insulator
U 875,978 January 7, 1908 Electric Switch
High-tension switch supported on several multipart insulators.
BAUM, Frank George
U 889,803 June 2, 1908 Support for Electrical Conductors
Impractical arrangement using a secondary insulator to support broken conductor above to prevent the line from dropping to the ground. It uses M-3890 insulators.
PAINE, Francis B. H.
Miscellaneous Niagara, Lockport and Ontario Power Co.
U 917,785 April 13, 1909 Insulating Support for High Tension Conductors
Suspension support system
U 930,141 August 3, 1909 Automatic Safety Device
A rotating metal member that catches a broken wire and shorts out the line effectively turning off the power before the line drops to the ground where it could have harmed someone coming in contact with the broken wire.
BOURDIL, Francois Fernand
U 959,929 May 31, 1910 High Voltage Switch
High voltage switch utilizing a string of suspension insulators
GODDARD, Walter T.
Switch Locke Insulator Mfg. Co.
U 1,099,421 June 9, 1914 High Voltage Switch
High voltage switch mounted on multipart insulators composed of triangle shaped metal rods and insulators that rotate to open or close the switch.
BURKE, Alfred Woodard
U 1,109,586 September 1, 1914 Line Disconnecting Switch
Switch to disconnect line for repairs. Composed of several multipart insulators, knife switch, and handles near the ground to operate the switch.
HEWLETT, Edward M.
Switch General Electric Co.
U 1,215,549 February 13, 1917 Electric Conductor Insulating Support
Suspension with method of balancing the electrical load across the string
KOONTZ, JR., John A.
Suspension 1/2 to Beardsley/1/4 to Shoemaker
U 1,245,940 November 6, 1917 Insulator
Suspension string of various size disks to balance electrical capacitance
MARVIN, Richard H.
Suspension The R. Thomas & Sons Co.
U 1,250,387 December 18, 1917 Electric Insulator
Suspension made of several parts bolted together
THOMAS, Percy H.
U 1,291,217 January 14, 1919 Adjustable Suspension Insulator
Suspension disk with adjustable length pin to equalize the potential across each disk to reduce arc-over
U 1,501,732 July 15, 1924 Column Strain Insulator
Electrose strain insulator
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 Specimen known 1,552,664 September 8, 1925 Insulator
Suspension arcing horn insulator (see 1,521,743 and 1,783,271)
AUSTIN, Arthur O.
Suspension The Ohio Brass Co.
U 1,710,880 April 30, 1929 Insulator Stack
Pedestal type stackable insulators with metal flanges that can be easily adjusted
LAPP, John S.
Pedestal Lapp Insulator Co., Inc.
U 1,712,432 May 7, 1929 Electrical Insulator Assembly
Suspension using Hewletts for novel electric switch
HAGERMAN, Alva Lloyd
U 1,717,210 June 11, 1929 High Voltage Circuit Interrupter
High voltage air break switch
GODDARD, Walter T.
Transmission General Electric Co.
U 1,930,735 October 17, 1933 Terminal Mounting for Lighting Fixtures
Terminal mounting for lighting fixture.
YARSLEY, Thomas G.
Fixture The Harford Faience Co.

Total of 0.01 seconds