Lock for an electrical switch

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Description

FIG. 1 is a front elevational view of a lock for an electrical switch showing my new design. The broken line showing the wall switch and switch plate is included for the purpose of illustrating environmental elements only and forms no part of the claimed design;

FIG. 2 is a rear elevational view thereof;

FIG. 3 is a right side elevational view thereof; the left side elevational view thereof being the mirror image;

FIG. 4 is a top plan view thereof; and,

FIG. 5 is a bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D178439 July 1956 Waller
D197426 February 1964 Hussar
D253171 October 16, 1979 Harris et al.
D264205 May 4, 1982 Logeman et al.
D319576 September 3, 1991 Westphal et al.
2472205 June 1949 Greider
2813938 November 1957 Speitzman
3811104 May 1974 Caldwell
3995201 November 30, 1976 Allardice, Jr.
4052655 October 4, 1977 Vizza
4468544 August 28, 1984 Wainess et al.
4506120 March 19, 1985 Fleischman
5115376 May 19, 1992 Nakajima
Foreign Patent Documents
2927333 January 1981 DEX
0239441 January 1946 CHX
Other references
  • Toggle switch lock on p. 2 of IBM Technical Disclosure Bulletin vol. 3, No. 8, Jan. 1961.
Patent History
Patent number: D353580
Type: Grant
Filed: Apr 13, 1992
Date of Patent: Dec 20, 1994
Inventor: Stephen K. Woehler (Indianapolis, IN)
Primary Examiner: Wallace R. Burke
Assistant Examiner: Joel Sincavage
Law Firm: Woodard, Emhardt, Naughton, Moriarty & McNett
Application Number: 7/867,928
Classifications
Current U.S. Class: Element Or Attachment (D13/173)