Electricity: circuit makers and breakers – Liquid contact – Time delay
Patent
1975-06-11
1977-07-05
Scott, James R.
Electricity: circuit makers and breakers
Liquid contact
Time delay
200 5A, H01H 1370
Patent
active
040341763
ABSTRACT:
A membrane switch in which a membrane layer is supported in a spaced relation from at least one contact of one or more pairs of electrically conductive switch contacts. The contacts are mounted on an insulated substrate. The membrane surface adjacent the contacts has an electrically conductive bridging surface supported thereon such that depression of the membrane will bridge the contacts to complete a circuit. The membrane is mounted on the substrate and is held in a normally spaced relationship with the contacts by a plurality of projections formed on the membrane surface adjacent the substrate or one or more of the contact surfaces. The projections may be integrally formed by puncturing the membrane surface with a sharp object or projections may be formed by permanently deforming the membrane without rupturing the membrane itself. Additionally, the projections may be formed by applying individual spacer elements to the membrane surface.
REFERENCES:
patent: 3728509 (1973-04-01), Shimojo
patent: 3735068 (1973-05-01), Yagana et al.
patent: 3749859 (1973-07-01), Webb et al.
patent: 3760137 (1973-09-01), Shimojo et al.
patent: 3761944 (1973-09-01), Shimojo
patent: 3860771 (1975-01-01), Lynn et al.
patent: 3879586 (1975-04-01), DuRocher et al.
patent: 3898421 (1975-08-01), Suzumura
patent: 3932722 (1976-01-01), Obata et al.
patent: 3988551 (1976-10-01), Larson
Kirschnik James L.
Magic Dot, Inc.
Ryan John Phillip
Scott James R.
Smith David B.
LandOfFree
Membrane switch apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Membrane switch apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Membrane switch apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-579143