Alarm system tester

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Description

FIG. 1 is a top front perspective view of an alarm system tester showing our new design, with the cover in an open position;

FIG. 2 is a bottom and left rear perspective view thereof with the cover closed;

FIG. 3 is a top plan view thereof, with the cover closed;

FIG. 4 is a rear elevational view thereof, with the cover closed;

FIG. 5 is a left side elevational view thereof with the cover closed.

Referenced Cited
U.S. Patent Documents
D194677 February 1963 Pickering
D202702 November 1965 Wise
D202922 November 1965 Huntsman
D238562 January 1976 Sylvester
3428888 February 1969 Nolte
3986106 October 12, 1976 Shuck
Patent History
Patent number: D256566
Type: Grant
Filed: Jul 27, 1978
Date of Patent: Aug 26, 1980
Inventors: Henry K. Zephir (Wilbraham, MA), Winthrop E. Wilson (Worcester, MA)
Primary Examiner: Nelson C. Holtje
Attorney: Alonzo L. Neal
Application Number: 5/928,841
Classifications
Current U.S. Class: Provided With Handle, Or Hand-held (D10/78); Electrical Property (D10/75)
International Classification: D1004;