G - Physics – 08 – B
Patent
G - Physics
08
B
G08B 13/00 (2006.01) G08B 13/14 (2006.01) G08B 13/22 (2006.01) H01H 35/14 (2006.01)
Patent
CA 2405490
The present invention provides an alarm for detecting the unauthorized movement of an object said alarm comprising a motion detection means and an audible alarm means. The motion detection means comprises an electro-mechanical motion sensor for detecting the unauthorized movement of an object and which responds to motion in all axes. The sensor comprises a housing having a base, cap and peripheral wall defining the interior of said housing wherein said base and cap have internal and external surfaces with a mid-point thereon and a series of radially extending electrical contacts on the internal surfaces of said base and cap, said contacts extending from about said mid point of said base and cap, wherein a metallic post is located between the mid points on the said base and cap respectively and wherein a metallic ball is provided within the housing and is of sufficient size that it can roll freely within the interior of said housing always in contact with said radially extending contacts, peripheral wall and/or post wherein said ball will tend to come to rest in a position against said post or peripheral wall while touching one or more of said radially extending contacts such that an electrical circuit is formed by contact between said ball and said post or peripheral wall and said radially extending contact wherein the radially extending contacts, peripheral wall, post and metallic ball are 24 karat gold plated. Means to detect when an electrical circuit is formed by the contact ring, ball and any radially extending contact and to detect when this circuit is broken by movement of the object. The means to detect when an electrical circuit is formed or broken preferably consists of a programmable control microprocessor and input means for programming said processor. The alarm can be attached to valuable items such as televisions, stereo systems, VCR's, video cameras, computers etc. When the alarm is armed it will sense any motion of the item to which it is attached and will sound an alarm if sufficient motion has been detected.
Blaney Mcmurtry Llp
Devine James Brian Paul
LandOfFree
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