Electricity: circuit makers and breakers – Multiple circuit control – Multiple switch
Patent
1988-09-26
1990-01-09
Scott, J. R.
Electricity: circuit makers and breakers
Multiple circuit control
Multiple switch
200292, 200294, H01H 1370
Patent
active
048929816
ABSTRACT:
A modular snap-in keypad apparatus includes a planar frame member having a plurality of button accommodating apertures and a plurality of mounting posts extending therefrom. An elastomeric key button assembly has a planar surface containing a plurality of apertures which are positioned to receive each post. The button assembly comprises a plurality of raised elastomeric button structures which extend through an associated button accommodating aperture when said posts of said frame assembly accommodates the apertures in the button assembly. A planar switch assembly has a plurality of apertures which are congruently positioned with respect to the posts to enable the contact assembly to be positioned with respect to each button so that a conductive area of the button contacts the contact assembly when the button is depressed. The contact assembly is fabricated on a Mylar sheet and has a contact area which consists of an outer partial circular contact having inwardly disposed triangular projections and an inner T-shaped contact. When a button is depressed the inner T-shaped contact contacts the outer circular contact by means of the conductive area of the button. A planar back plate is secured to the frame assembly by means of apertures therein. The back plate supports and further enables a user to tactically respond to switch depression.
REFERENCES:
patent: 4243846 (1981-01-01), Lenaerts et al.
patent: 4409450 (1983-10-01), Blades
patent: 4580018 (1986-04-01), Yoshihara
patent: 4636593 (1987-01-01), Novak et al.
patent: 4700025 (1987-10-01), Hatayuma
Farrell Richard
Soloway Richard
Plevy Arthur L.
Scott J. R.
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