Motion responsive switch and alarm system

Claim 2

A self-contained detector for an alarm system to provide signals to a remote receiver, said detector comprising an enclosure; mounting means attached to said enclosure whereby said enclosure is adapted to be freely suspended beneath said mounting means; motion responsive switch means having an elongate housing in said enclosure, said housing being arranged to be substantially vertical when the enclosure is suspended by the mounting means, an upper electrical contact member extending into the housing at the top thereof when said enclosure is suspended beneath the mounting means, a lower elecTrical contact member extending into the housing at the bottom thereof when the enclosure is suspended from the mounting means, an electrical conductive movable contact member, and means resiliently mounting the movable contact member in the housing and electrically connected to the upper contact member whereby the entire movable contact is closely spaced above the lower contact member when the means resiliently mounting the movable contact is stretched by the weight of the movable contact member; and transmitter means mounted in said enclosure to provide signals to the remote receiver in response to actuation of said motion responsive switch means.

Claim 3

A self-contained detector as in claim 1, wherein the lower contact member has an upper central extremity and the movable contact member has a lower central extremity in vertical alignment with the upper central extremity when the elongated housing is vertically arranged and the movable contact member is centrally positioned within the elongate housing.

Claim 4

For use with an alarm system, a motion responsive switch, said switch comprising an elongate housing having upper and lower end portions; a stationary contact disposed in said housing; a movable contact disposed in said housing above said stationary contact and normally spaced therefrom; elongate elastic support means having upper and lower ends and fastened at the upper end thereof to said upper end portion of said elongate housing, said movable contact being attached to said lower end of said elastic support means for vertical movement in said housing; and adjustable mounting means supporting said stationary contact in said lower end portion of said housing and selectively adjustable to adjust said stationary contact relative to said movable contact to provide the desired spacing therebetween, said adjustable mounting including a stationary spring seat member affixed to said lower end portion of said housing, a selectively movable spring seat member in engagement with said stationary contact, spring means between said stationary and movable spring seat members biasing said stationary contact in a first direction toward said movable contact, and stop means associated with said stationary contact for preventing movement thereof beyond a selected position under the influence of said spring means.

Claim 5

For use with an alarm system, a motion responsive switch, said switch comprising an elongate housing having upper and lower end portions; a stationary contact disposed in said housing; a movable contact disposed in said housing above said stationary contact and normally spaced therefrom; elongate elastic support means having upper and lower ends and fastened at the upper end thereof to said upper end portion of said elongate housing, said movable contact being attached to said lower end of said elastic support means for vertical movement in said housing; and adjustable mounting means supporting said stationary contact in said lower end portion of said housing and selectively adjustable to adjust said stationary contact relative to said movable contact to provide the desired spacing therebetween, said adjustable mounting including a stationary spring seat member affixed to said lower end portion of said housing, a selectively movable spring seat member in engagement with said stationary contact, spring means between said stationary and movable spring seat members biasing said stationary contact in a first direction toward said movable contact, and stop means associated with said stationary contact for preventing movement thereof beyond a selected position under the influence of said spring means.

Claim 6

The structure set forth in claim 3 wherein said stop means includes a stop member attached to said stationary contact, said adjustable mounting means including an adjustment member adjustably fastened to said stationary spring seat member for selective vertical movement relative thereto.

Claim 7

The structure set forth in claim 4 wherein said adjustment member includes a stop shoulder engaged by said stop member associated with said stationary contact.

Claim 8

The structure set forth in claim 5 wherein said stop member normally presses upwardly against said stop shoulder under the influence of said spring means.

Claim 9

The structure set forth in claim 6 wherein said stationary contact includes a downwardly extending neck portion which is reciprocally received by a bore in said adjustment member, said stop member being attached to the lower end of said neck portion below said bore.