Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
149 words
An alarm apparatus for sensing a predetermined motion of an object under surveillance, comprising an electrical circuit energized by the flow of an electric current, at least one switching device included in said circuit and being of the type having a pair of stable current conducting positions for quiescently conducting said electric current and an unstable tripping or current blocking position for interrupting said electric current when said predetermined motion of object occurs, means for displaying the occurence of said current blocking position of said switching device as said alarm condition for said object, wherein a plurality of said switching devices are connected in series in said circuit, wherein a differentiating circuit branch is coupled before said display means, said differentiating circuit branch outputting said current blocking position of said switching device in the form of a pulse and, wherein said displaying means comprises a pulse sensing registration device.
Claim 2
Dependent Claim
149 words
An alarm apparatus for sensing a predetermined motion of an object under surveillance, comprising an electrical circuit energized by the flow of an electric current, at least one switching device included in said circuit and being of the type having a pair of stable current conducting positions for quiescently conducting said electric current and an unstable tripping or current blocking position for interrupting said electric current when said predetermined motion of object occurs, means for displaying the occurence of said current blocking position of said switching device as said alarm condition for said object, wherein a plurality of said switching devices are connected in series in said circuit, wherein a differentiating circuit branch is coupled before said display means, said differentiating circuit branch outputting said current blocking position of said switching device in the form of a pulse and, wherein said displaying means comprises a pulse sensing registration device.
Claim 3
Dependent Claim
29 words
The alarm apparatus as claimed in claim 1, wherein said circuit further comprises a light emitting element for displaying, upon selected actuation, the normal operating condition of said apparatus.
Claim 4
Dependent Claim
24 words
The alarm apparatus as claimed in claim 2, wherein said light emitting element is coupled to said circuit by means of a transistor device.
Claim 5
Dependent Claim
236 words
The alarm apparatus as claimed in claim 1, wherein each of said switching devices comprises a pair of rest contacts formed each as a body of rotation, means for insulating said pair of rest contacts from each other in a first of said stable positions, said rest contacts forming an inner switching chamber therebetween, sealing ring means tightly sealing the edges of said contacts and said chamber therebetween, one of said rest contacts comprising a reservoir shaped central segment for the storing of a liquid metal contact therein and an outer segment integrally joined to said central segment, said outer segment having a radius of curvature larger than the radius of curvature of said central segment, a contact stub protruding from the other of said rest contacts and into the liquid metal at said first to said stable positions, during said tripping position of said switching device said liquid metal flowing over onto said outer segment whereby current flow between said first and second rest contacts is interrupted, said second stable position establishing contact between said first and second rest contacts and occurring when said tripping goes beyond a predetermined limit, the quantity of said liquid metal contact is such that it retains contact with said contact stub below a predetermined limit of tripping and interrupts said current flow above said predetermined limit of tripping and thereafter establishes current flow again at said second stable position.
Claim 6
Dependent Claim
38 words
The alarm apparatus as claimed in claim 4, wherein said central segment and said outer segment are spherically shaped about a central axis of rotation of said switching device, said contact stub being formed along said central axis.
Claim 7
Dependent Claim
25 words
The alarm apparatus as claimed in claim 5, wherein each of said rest contacts comprises a terminal stub protruding outwardly therefrom along said central axis.