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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 = '174') ORDER BY date ASC, patent, type

Total of 117 patents found where: Class is '174'; Subclass is '174';

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T / S Patent Date Description Patentee Category Assigned To
 1864
U 41,157 January 5, 1864 Improvement in Insulators for Telegraph Wires
Earthenware (terra-cotta) insulator to hold 3 to 7 wires
HOLLAND, James
Earthenware  
 1867
U 66,453 July 9, 1867 Improvement in Insulators for Telegraphs
Earthenware pin and insulator saturated with tar
BOYNTON, John F.
Earthenware  
U Specimen known 70,727 November 12, 1867 Improvement in Insulators for Lightning Rods
Lightning rod insulator (glass) with sheet metal strip under shingles
LOCKHART, Thomas J.
LOCKE, Josiah
Lightning Rod Insulator  
 1871
U 121,368 November 28, 1871 Improvement in Telegraph Insulators
Triangular insulator to reduce surface contact of tie wire
HOLLEY, Minard Y.
Triangular  
 1872
U Specimen known 122,961 January 23, 1872 Improvement in Telegraph Insulators
Wooden insulator coated with tar with metal cap
POND, Chester H.
Wood  
U Specimen known 123,878 February 20, 1872 Improvement in Telegraph Insulators
CD 141.9, four projections to reduce surface contact
EMMINGER, David R. P.
Insulator  
U 129,724 July 23, 1872 Improvement in Insulators for Telegraphic Uses
Roughened lower surface of insulator to retain patented coating mixture
FARMER, Moses G.
Rough  
 1877
U Specimen known 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
 1883
U Specimen known 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 Specimen known 286,801 October 16, 1883 Insulator
CD 109, CD 135, diamond shaped wire groove
FISKE, Bradley
MOTT, Samuel
Insulator  
U Specimen known 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 Specimen known 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  
 1884
U 297,683 April 29, 1884 Telephone Line
Insulator and pin coated with waterproof compound
DOOLITTLE, Thomas B.
Miscellaneous  
U 301,446 July 1, 1884 Insulator for Electric Wires
Hook with glazed covering (see 293,242 and 294,384)
HALE, Albert W.
Hook  
U 305,020 September 9, 1884 Insulator for Lightning Rods
Lightning rod insulator of two interlocking parts
RUTH, John Anthony
Lightning Rod Insulator  
 1885
U 319,447 June 9, 1885 Insulator
Wire groove projections through metal cover to contact wire
BROOMHALL, George L.
Wire  
U 324,957 August 25, 1885 Telegraph Insulator
Insulator (glass) screwed into crossarm
PUTNAM, Jacob D.
Insulator  
U 328,929 October 27, 1885 Electric Wire Insulator and Supporter
Wooden self-tying cleat
FAWCETT, William N.
HUNTLEY, George F.
Wood  
 1886
U 347,454 August 17, 1886 Telegraph Wire and Insulator Fastening
Self-tying with retainer for holding wire in groove
WILSON, John
Self-tying Miscellaneous  
U Specimen known 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
 1888
U 383,734 May 29, 1888 Insulator for Electrical Wires
Self-tying slot top & metal keeper
KEYES, Frank E.
Self-tying Slot Top  
U 390,741 October 9, 1888 Insulator or Bracket Support for Electric Wires
miscellaneous odd pin type with curved pinhole
ADAMS, Thomas E.
Miscellaneous  
 1889
U 415,504 November 19, 1889 Insulator
Insulator with internal spring to hold tension on the wire
FOWLER, George
Spring  
 1890
U 425,513 April 15, 1890 Insulator
Rainshed (hood) over wire
KOOKOGEY, William P.
Rainshed The Kookogey Electric Co.
U Specimen known 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  
 1891
U 450,384 April 14, 1891 Electric Wire Insulator
Knob with two grooves and side petticoat
BERTOLETTE, Daniel A.
Knob  
U Specimen known 451,950 May 12, 1891 Electric Insulator
CD 262, CD 263, CD 264, eyes for tie wire
OAKMAN, Samuel
Insulator  
 1892
U 477,980 June 28, 1892 Insulator
Knob
WIRT, Herbert C.
Knob The Thomson-Houston Electric Co.
U 482,297 September 6, 1892 Electric Insulator
Threaded externally with saddle groove and square hole
CLARK, William H.
Thread  
U 485,106 October 25, 1892 Insulator
Knob of mica with side groove to hold wire
LEE, Charles T.
Knob The Johns-Pratt Co.
 1894
U Specimen known 520,367 May 22, 1894 Insulator
Transposition insulator CD 204 & U-192A
LOCKE, Fred M.
Insulator 1/2 to G. Paddock & W. Page
U 527,317 October 9, 1894 Insulator
Protective shield for wire groove
BULLOCK, Edward J.
Protective Shield  
 1895
U 544,959 August 20, 1895 Insulator
Wire sheath fit in insulator groove
COLLINS, Reuben G.
FOLEY, Frank W.
Wire  
U Specimen known 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
U 549,443 November 5, 1895 Electric Supporting Insulator
Knob
COLLINS, Joseph
Knob  
 1896
U 573,101 December 15, 1896 Wall Insulator
Slack wire ring driven into mortar between bricks
O'NEILL, James J.
Slack Wire  
 1897
U 586,372 July 13, 1897 Insulator
Self-tying slot top with perpendicular hole for retainer
STEINBERG, JR., Henry W.
Self-tying Slot Top  
U 587,614 August 3, 1897 Electric Wire Holder
Wireholder
STRAM, Charlie J.
Wireholder  
U Specimen known 590,806 September 28, 1897 Insulator
U-937, eave trough above crossarm
LOCKE, Fred M.
Insulator  
U 592,505 October 26, 1897 Electrical Insulator
Protective coating of elastic material and wire groove protector
BARBOUR, Wellington
Protective Coat  
 1898
U Specimen known 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  
 1899
U 627,366 June 20, 1899 Insulator for Fastening Electric Wires
Knob - self-tying
TRELEAVEN, John
Knob Harry Painter and Christopher Turton
U Specimen known 633,173 September 19, 1899 Insulator
CD 143 with external projections to absorb mechanical shock - horizontal ridges
WITHYCOMBE, Frederick H.
Insulator 11/20 to Clement H. McLeod
 1900
U 660,140 October 23, 1900 Insulator
Clamp type ribbed cylindrical 2-piece
ALLEY, Cassius
Clamp Type 1/3 to C. Miller & H. Wagner
U 660,271 October 23, 1900 Insulating Knob for Electric Light Wiring
Knob - self-tying
HENDERSON, Robert H.
HENDERSON, John G.
Knob  
 1901
U 689,171 December 17, 1901 Insulator
Insulators (2) with one pinhole
DUFFY, John F.
HERSHEY, Henry B.
Insulator  
 1903
U Specimen known 724,329 March 31, 1903 Insulator
Self-tying nail-knob with three flanges on top for tying wire around the knob and saw-toothed bottom edge to prevent the knob from turning.
POLK, Robert H.
Knob  
U Specimen known 724,848 April 7, 1903 Insulator
CD 159, wire groove with flat surface for line wire
GREGORY, Ferdinand W.
Insulator  
 1904
U Specimen known 753,399 March 1, 1904 Combination Bracket and Knob for Electric Conductors
nail-knob with hole in the top and two side groove for tie-wire (see Western Electrician 4-29-1905)
HUNT, Emory C.
Knob 1/2 to Charles Snyder
 1905
U 783,348 February 21, 1905 Insulator
Knob - self-tying
WRIGHT, Evans C.
Knob 1/2 to Francis McHenry
U 785,561 March 21, 1905 Wiring Cleat
Cleat - self-tying
LATIMER, John M.
Cleat Consolidated Fire Alarm Co.
U 803,010 October 31, 1905 Insulator
Pin with grooved insulator on top of crossarm to catch wire if it falls off of insulator
MORRIS, Elmer P.
Pin  
U 804,115 November 7, 1905 Electrical Insulator
Knob - self-tying
GOODRIDGE, Gilbert W.
Knob  
 1906
U 831,168 September 18, 1906 Insulator
Knob on side of pony insulator similar to British terminal insulator
LEMBECK, Arthur J. L.
Knob 1/2 to John Wall
U 833,877 October 23, 1906 Insulator
miscellaneous bolted insulator
GRANT, Francis Jones
Miscellaneous  
 1907
U 843,844 February 12, 1907 Third Rail Insulator
Third rail insulator
REDMAYNE, Robert Norman
Third Rail  
U 855,355 May 28, 1907 High Potential Insulator
Electrose multipart insulator for high voltages
STEINBERGER, Louis
Electrose  
U 861,275 July 30, 1907 Insulator for Electric Wires
Cleat - self-tying
GALLAGHER, Constantine
Cleat  
U Specimen known 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 872,756 December 3, 1907 Insulator
Self-tying screw top
SCHERER, Frederick C.
FASHBAUGH, Henry C.
Self-tying Screw Top  
 1908
U 876,828 January 14, 1908 Insulator
Composition design of reinforced concrete
MCNUTT, Ross C.
Composition  
U 879,033 February 11, 1908 Insulators for Electric Wires
Knob
CALDWELL, John
Knob  
U 885,678 April 21, 1908 Insulator for Heavy Currents
Heavy duty Electrose insulator that was bolted to supports and had several horizontal flanges or skirts.
STEINBERGER, Louis
Electrose  
U 891,955 June 30, 1908 Insulator
Self-tying insulator attached to top of crossarm consisting of a plate with two knobs to wrap the line wire around
SANDLIN, William C.
Self-tying Miscellaneous 1/3 to Arthur Moulton and 1/3 to C. W. Savage
U 898,921 September 15, 1908 Insulator
Dry-spot, English screw cap design
PURVES, Thomas F.
SINNOTT, John
Dry-spot  
U 902,262 October 27, 1908 Insulator Protector
Covering for insulator
SPARKS, Robert Romney
Covering  
 1909
U 918,127 April 13, 1909 Insulator
miscellaneous - specially shaped crown slot to hold wire
CLARK, Walter G.
Miscellaneous  
U Specimen known 927,186 July 6, 1909 High Potential Strain Insulator
Electrose strain insulator, specimen marked with this patent
STEINBERGER, Louis
Electrose  
U 944,259 December 28, 1909 Insulator
Self-tying miscellaneous
DENNLER, August G.
Self-tying Miscellaneous 1/3 to William Quigg
 1910
U Specimen known 948,321 February 8, 1910 Knob Insulator
Knob or spool to support a pair of insulation covered wires
GRACE, Sergius P.
Knob Western Electric Co.
U 954,350 April 5, 1910 Insulator
Wire groove on top with enlarged crown to aid in tying (see 1,229,272)
SILER, Andrew J.
Wire 1/3 to Aaron Siler & 1/3 to Sumner Siler
U Specimen known 954,596 April 12, 1910 Insulator
Knob (Fireplug)
STADERMANN, Albert L.
Knob  
U 971,322 September 27, 1910 Mine Insulator
Mine hanger insulator (see GB191027804)
SPEAKMAN, Charles W.
Mine  
 1911
U 1,008,087 November 7, 1911 Insulator
Cleat - self-tying
SWEENEY, James M.
Cleat  
 1912
U 1,038,418 September 10, 1912 Insulator
Self-tying slot top
NELSON, William H. S.
Self-tying Slot Top  
 1913
U 1,054,138 February 25, 1913 Means for Attaching Wires and Cables to Insulators
Clamping wire device to eliminate tie wire (French gingerbread man)
PARRA, Henri
Clamp Type Societe H. Parra Et. Cie.
U 1,054,690 March 4, 1913 Electric Wire Supporting Device
U-shaped block insulator fitted into slots in the crossarm to hold telegraph and telephone lines.
HICKS, Henry A.
Block  
U 1,065,737 June 24, 1913 Insulator and Support
Spiral conical insulator for tightening of line wire
SLONECKER, Abiram J.
Spiral  
 1915
U Specimen known 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  
U 1,166,392 December 28, 1915 Insulator
Electrose strain that can be bolted between two crossarms
STEINBERGER, Louis
Electrose  
 1916
U 1,174,287 March 7, 1916 Insulator Support
Pin - hollow metal & bolted to crossarm for CD 257
ROSENFELD, Mortimer C.
Insulator  
U 1,190,286 July 11, 1916 Insulator
Self-tying non-pintype
HARLAN, Earle
Self-tying Miscellaneous  
 1917
U Specimen known 1,213,011 January 16, 1917 Device for Connecting Outside Wires to Buildings
Odd cylindrical knob with off-center screw hole and external grooves for attaching wires to buildings (see reissue 14,312 on 6-5-1917) [Angle Insulator Co.]
RAGOTZKY, Philip C.
Knob  
R Specimen known 14,312 June 5, 1917 Device for Connecting Outside Wires to Buildings
Odd cylindrical knob with off-set screw hole and external grooves for attaching wires to buildings (reissue of 1,213,011) [Angle Insulator Co.]
RAGOTZKY, Philip C.
Knob  
U Specimen known 1,229,272 June 12, 1917 Insulator
CD 210 with top saddle groove (see 954,350)
IRWIN, John J.
Insulator  
 1918
U 1,284,799 November 12, 1918 Knob and the Like
Knob with two vertical grooves and lag screw for mounting to building
SINDELAR, Lambert J.
Knob  
 1925
U Specimen known 1,527,318 February 24, 1925 Insulator
Knob with multiple side grooves
LEWIS, Edwin
Knob American Telephone & Telegraph Co.
U 1,530,298 March 17, 1925 Knob
Knob with side grooves
CHAMBLESS, Young J.
LEE, Ammie L.
Knob  
U 1,538,428 May 19, 1925 Pole Line Insulator
Self-tying odd insulator screwed into cut-out in top of crossarm
EMMONS, Albert F.
Self-tying Miscellaneous  
 1927
U 1,651,704 December 6, 1927 Line Insulator
Wireholder with lag screw
HENDEE, Lem E.
Wireholder Line Material Co.
 1928
U Specimen known 1,688,411 October 23, 1928 Electrical Insulator
Crown cable & tie wire groove arced to reduce stress from wire/cable
COOK, William S.
Crown  
U 1,694,415 December 11, 1928 Insulator
Under crossarm type (see 955,661)
GORDON, Chester S.
Under American Telephone & Telegraph 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 Specimen known 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 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 Specimen known 1,709,477 April 16, 1929 Insulator
Wireholder with lag screw
KYLE, William D.
Wireholder Line Material Co.
U 1,720,181 July 9, 1929 Insulator
Wireholder
KYLE, William D.
Wireholder Line Material Co.
 1930
U 1,744,674 January 21, 1930 Insulator Pin
Pin that holds insulator at an angle against strain on turns in the conductor
PORTER, Edward Y.
Pin  
U Specimen known 1,755,971 April 22, 1930 Insulator
Neon, knob to support wires for neon sign (""spook"" insulator)
SMALLEY, Robert C.
Neon Claud Neon Lights, Inc.
 1932
U Specimen known 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 Specimen known 1,892,798 January 3, 1933 Cable Rider
Cable support tray (specimens are not uncommon to find)
ELMER, William B.
AVILA, Charles F.
Miscellaneous Charles B. Elmer
U 1,927,106 September 19, 1933 Insulator
Carrier circuit insulator with metal skirt coated with insulating material
WILSON, Leon T.
Carrier American Telephone & Telegraph Co.
 1934
U 1,954,592 April 10, 1934 Wire Support
Wireholder
KLINGEL, Edward L.
Wireholder  
U Specimen known 1,955,609 April 17, 1934 Insulator
U-856A fogbowl
ROWLAND, Davidge H.
Insulator Locke Insulator Corp.
 1935
U 2,022,386 November 26, 1935 Conductor Support
Little bracket with insulator crown to hold low voltage wire attached to a wood pole (see 2,198,839)
PITTMAN, Ralph R.
Miscellaneous  
 1937
U Specimen known 2,088,433 July 27, 1937 Fog and Dust Insulator
U-816 series
PLIMPTON, Bentley A.
Insulator Locke Insulator Corp.
 1940
U Specimen known 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 2,191,171 February 20, 1940 Insulator
Wireholder with lag screw
LEE, Leffman H.
GUTHRIE, James M.
Wireholder Line Material Co.
 1941
U 2,237,717 April 8, 1941 Insulator Structure
Wireholder with multiple grooves and lag screw
STEWART, Lory B.
STEWART, Alvin J.
Wireholder 1/3 to Karl Thielscher
D Specimen known 126,722 April 22, 1941 Design for a Line Insulator
Surge fence knob
SCHILLING, Lorell John
Knob Babson Brothers Co.
U Specimen known 2,266,400 December 16, 1941 Insulator
CD 216
REED, Frederick F.
Insulator  
 1942
U Specimen known 2,286,488 June 16, 1942 Spool Insulator
Spool insulator with deep side groove
JOHNSON, Lewis E.
Spool Porcelain Products, Inc.
 1944
U 2,343,576 March 7, 1944 Support for Electric Conductors
Knob
PITTMAN, Ralph R.
Knob  
 1945
U 2,372,995 April 3, 1945 Tap-Isolating Conductor Support
miscellaneous
WHITMORE, Paul G.
Miscellaneous  
 1946
U 2,406,095 August 20, 1946 Insulator
Dry-spot
MATHEWS, Martin D.
Dry-spot  
 1947
U 2,426,466 August 26, 1947 Insulator for Electrical Wire Conductors
Cleat with V-groove to hold line wire between the two halves
MINARIK, Rudolph A.
Cleat 1/2 to Ralph E. Meech
 1960
U Specimen known 2,921,112 January 12, 1960 Electric Conductor Strand Separator Insulator
Spacer for conductors
DYKSTRA, Laurence J.
GRILLS, Lee J.
Spacer The Porcelain Insulator Corp.

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