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US 4,952,761 AGranted
Touch contact switch
AssigneePreh-Werke GmbH & Co. KG
InventorHans-Joachim Viebrantz
Life of this patent
Estimating the term…
Abstract
A touch contact switch having a plane contact arrangement has a cover of elastic material covering the contact arrangement. Contacting in the contacting arrangement takes place only after a deliberate force P' has been applied which causes a partial surface in the switch to arch in the direction of operation of the switch and to cause contacting in the contacting arrangement.
Claims8
A touch contact switch comprising:
- a planar contact mechanism including a fixed contact and a movable counter contact, said movable counter contact contacting the fixed contact upon actuation of the touch contact switch;
- an elastic cover covering said contact mechanism;
- an operating member which is fixed elastically at a distance from said contact mechanism, said operating member travelling a distance in an operating direction with a clearly recognizable stroke H upon actuation of the touch contact switch by a force P, the operating member including a partial surface formed in a central portion on an inner side of the operating member, said partial surface effecting contact with the contact mechanism;
- and
- a stroke limiting means for limiting the stroke H of the operating member caused by the force P to prevent inadvertent actuation of the touch contact switch, said stroke limiting means including at least one supporting surface disposed along the periphery of said partial surface and protruding downwardly therefrom, wherein an additional force P' acting upon the central portion of the operating member causes the partial surface to arch in the contacting direction to overcome the stroke limiting means and effect contact between the movable counter contact and the fixed contact.
2 more elements
Dependencies are inferred from the claim text.