Digital transfer switch with diagnostic display

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Description

FIG. 1 is a front perspective view of a digital transfer switch with diagnostic display showing my new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a side elevational view thereof, the opposite side being a mirror image;

FIG. 4 is a top plan view thereof.

Referenced Cited
U.S. Patent Documents
3264526 August 1966 Wiggerman
Other references
  • Altair Computer Catalog, .COPYRGT.1977, pp. 5 & 6, Altair 8800b Turnkey Model. Computer Design, 9-1979, p. 76, Datamax PRH-28/6 Multiplexer. Computer Design, 12-1979, p. 158, Interface Housing. Polymorphic Systems System 8810 Specification, 1979 Disk System Housing. T-Switch Control. Communications Line Switch Model CL52. Digital Transfer Switch Series 5712 & 5722. Computer Room Accessories, p. 29, ABC Box Switches. Harbor Electronics AB Transfer Switch.
Patent History
Patent number: D272446
Type: Grant
Filed: Jun 8, 1981
Date of Patent: Jan 31, 1984
Inventors: Michael J. Dellecave (Cincinnati, OH), Jack L. Klosterman, Sr. (Cincinnati, OH)
Primary Examiner: Susan J. Lucas
Law Firm: Frost & Jacobs
Application Number: 6/271,816
Classifications
Current U.S. Class: D14/107; D13/41
International Classification: D1303; D1402;