Three keypad pushbutton set for telecommunications instruments
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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.
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4540865 | September 10, 1985 | Calder |
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