Motion detection device including a pendulum switch

Claim 1

A motion detection device comprising: A. a pair of electrical terminals having a potential difference established therebetween; B. a multiplicity of pairs of mutually spaced electrical contacts arranged in intersecting planes and commonly connected to one electrical terminal of said pair of electrical terminals; C. an electrically conductive, first pendulous mass connected with the other terminal of said pair of terminals suspended for pendulous motion between said multiplicity of pairs of contacts and adapted to engage the contacts for thus establishing electrical continuity between the pair of terminals; and D. a second pendulous mass suspended from said first pendulous mass for damping pendulous motion imparted thereto having means including a level for indicating the instantaneous position of the masses relative to a vertical plane projected substantially midway between at least one pair of contacts.