Claims
- 1. A switch for use in a security system comprising a cooperating pair of electrical contacts consisting of a first stationary contact and a second movable contact normally in a spaced clearance position therefrom so as to correspondingly provide said switch with a normally open condition, a switch mounting member in the form of a hollow tube bounding a smooth cylindrical operative compartment oriented lengthwise thereof having a first opening at a distal end of said compartment and a second opening at an opposite proximal end thereof, said pair of contacts being mounted in said distal end first opening of said compartment and said hollow tube being attached with said proximal end second opening adjacent to and affixed to a support wall, so as to position said pair of contacts in a rearwardly spaced relation behind said support wall, said support wall having an opening aligned with said second opening and of the same cross-section, and a probe, sized to project into said compartment and electrically close said contacts, whereby the presence of said switch is undetectable except for said support wall opening.
Parent Case Info
This application is a continuation of U.S. patent application Ser. No. 939,409 filed Dec. 8, 1986 now U.S. Pat. No. 4,762,198.
US Referenced Citations (5)
Continuations (1)
|
Number |
Date |
Country |
Parent |
939409 |
Dec 1986 |
|