Insulator tester unit

Description

FIG. 1 is a front and bottom left perspective view of an insulator test unit showing our new design;

FIG. 2 is a front and top left perspective view thereof in an open position;

FIG. 3 is a top plan view of FIG. 2;

FIG. 4 is a front elevational view of FIG. 2;

FIG. 5 is a rear elevational view of FIG. 2;

FIG. 6 is a left side elevational view of FIG. 2;

FIG. 7 is a top and right side perspective view of FIG. 2;

FIG. 8 is a bottom plan view of FIG. 2.

Referenced Cited
U.S. Patent Documents
D224319 July 1972 Sylvester
D238562 January 1976 Sylvester
D256566 August 26, 1980 Zephir
D256895 September 16, 1980 LeBlanc
D268172 March 8, 1983 Chirkov
D280804 October 1, 1985 Hardy
Other references
  • Design News-5/21/73-p. 140, Impaet Analyzer at top-right.
Patent History
Patent number: D299439
Type: Grant
Filed: Oct 15, 1985
Date of Patent: Jan 17, 1989
Inventors: John A, Farquhar (Vancouver, B.C.), Merrilyn J. Farquhar (Vancouver, B.C.)
Primary Examiner: Nelson C. Holtje
Law Firm: Barrigar & Oyen
Application Number: 6/787,489