Membrane operator interface panel for industrial programmable controller

- Square D Company
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Description

FIG. 1 is a right front perspective view of a membrane operator interface panel for industrial programmable controllers showing my new design;

FIG. 2 is a front plan view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a left elevational view thereof;

FIG. 5 is a back elevational view thereof;

FIG. 6 is a top plan view thereof; and,

FIG. 7 is bottom plan view thereof.

Referenced Cited
U.S. Patent Documents
D256230 August 5, 1980 Beale et al.
D272436 January 31, 1984 Trabucchi et al.
D296776 July 19, 1988 Hansen et al.
4398086 August 9, 1983 Smith, III
4645942 February 24, 1987 Nilssen
4710597 December 1, 1987 Loheac
Other references
  • Controller panel on p. 307 of Westinghouse Consulting Application Guide, Catalog Reference 8700, Mar. 1989.
Patent History
Patent number: D341354
Type: Grant
Filed: Aug 19, 1991
Date of Patent: Nov 16, 1993
Assignee: Square D Company (Palatine, IL)
Inventor: Randall R. Holterman (Mequon, WI)
Primary Examiner: Wallace R. Burke
Assistant Examiner: J. Sincavage
Attorneys: Larry I. Golden, Michael J. Femal, Richard J. Graefe
Application Number: 7/747,232