Three keypad pushbutton set for telecommunications instruments

- Plessey Overseas Limited
Description

FIG. 1 is a left side, top and front perspective view of the left-hand button of a three keypad pushbutton set for telecommunications instruments showing our new design;

FIG. 2 is a top plan view thereof;

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

FIG. 4 is a rear elevational view thereof;

FIG. 5 is a left side, top and front perspective view of the center button thereof;

FIG. 6 is a top plan view of the center button of the set;

FIG. 7 is a front elevational view of the center button, the rear elevational view being a mirror image;

FIG. 8 is a left side elevational view of the center button, the side opposite being a mirror image thereof;

FIG. 9 is a left side, top and front perspective view of the right-hand button of the set;

FIG. 10 is a top plan view of the right-hand button;

FIG. 11 is a rear elevational view thereof;

FIG. 12 is a left side elevational view thereof;

FIG. 13 is a bracketed top plan view of the set of left-hand, center and right-hand buttons in assembled relationship; and

FIG. 14 is a bracketed left side, top and front perspective view of the three button set in bracketed relationship.

Referenced Cited
U.S. Patent Documents
D219027 October 1970 Miller
D249511 September 19, 1978 Olson
D265648 August 3, 1982 Fukushima et al.
D265735 August 10, 1982 Fukushima et al.
D269512 June 28, 1983 Goldberg
3668356 June 1972 Kekas
3736397 May 1973 Pedersen
3780237 December 1973 Seeger, Jr. et al.
3871506 March 1975 Von Luders
4529849 July 16, 1985 Kamei et al.
4540865 September 10, 1985 Calder
Patent History
Patent number: D305422
Type: Grant
Filed: Oct 22, 1986
Date of Patent: Jan 9, 1990
Assignee: Plessey Overseas Limited (Ilford)
Inventors: David J. Steer (Lincoln), Steven Hawker (Arnold), Leonard Colebourne (Nottingham)
Primary Examiner: Horace B. Fay, Jr.
Attorneys: Michael F. Oglo, Julian C. Renfro
Application Number: 6/922,986
Classifications