Location marker
First Claim
Patent Images
1. A signalling device comprising:
- a housing enclosing a battery source and an electronic circuit;
a switch assembly for selectively connecting and disconnecting at least one pair of terminals of said source, said switch assembly comprising;
two contact pads arranged on one surface of a contact block, each of said pads adapted to contact, in a first position, one of said terminals;
a magnetically operable switch located in said contact block that provided for electrical connection and disconnection between said contact pads;
a boss rotatably connected to said contact block and rotatable between two positions, one of said positions aligning a magnet located within said boss with said magnetically operable switch, to activate said magnetically operable switch under normal operation of said device, said boss and said contact block being adapted to rotate together such that at least one of said contact pad contacts, in a second position, said terminals, to connect said source and said circuit in the event of failure of said magnetically operable switch; and
a signal emitter connected to said circuit, said circuit being adapted to derive energy from said source and to supply pulses of energy to said emitter, each said pulse providing substantially uniform energizing power during the life of said source.
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Accused Products
Abstract
A location marker includes a casing, a switch assembly and a lens enclosing a flashable strobe lamp. The location marker is powered by batteries and an electronic circuit that converts the battery voltage to a trigger voltage for illumination of the strobe lamp. The switch assembly is non-intrusive and maintains water tight integrity inside the casing. The switch assembly futher includes a magnetically operable switch for selectively connecting and disconnecting two pairs of terminals. An R.F. transmitting location marker is also employed using a transmitter circuit and an antenna.
43 Citations
14 Claims
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1. A signalling device comprising:
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a housing enclosing a battery source and an electronic circuit; a switch assembly for selectively connecting and disconnecting at least one pair of terminals of said source, said switch assembly comprising; two contact pads arranged on one surface of a contact block, each of said pads adapted to contact, in a first position, one of said terminals; a magnetically operable switch located in said contact block that provided for electrical connection and disconnection between said contact pads; a boss rotatably connected to said contact block and rotatable between two positions, one of said positions aligning a magnet located within said boss with said magnetically operable switch, to activate said magnetically operable switch under normal operation of said device, said boss and said contact block being adapted to rotate together such that at least one of said contact pad contacts, in a second position, said terminals, to connect said source and said circuit in the event of failure of said magnetically operable switch; and a signal emitter connected to said circuit, said circuit being adapted to derive energy from said source and to supply pulses of energy to said emitter, each said pulse providing substantially uniform energizing power during the life of said source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A switch assembly for selectively connecting and disconnecting two pairs of terminals, said assembly comprising:
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two contact pads arranged on one surface of a contact block, each of said pads adapted to contact, in a first position, two adjacently located terminals; a magnetically operable switch located in said contact block that provides for electrical connection and disconnection between said contact pads; a boss rotatably connected to said contact block and rotatable between two positions, one of said positions aligning a magnet located within said boss with said magnetically operable switch; said boss and said contact block being adapted to rotate together such that each said contact pad contacts, in a second position, to adjacently located terminals. - View Dependent Claims (13)
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14. In an electrical apparatus having an electrical source, the improvement comprising;
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a switch assembly for selectively connecting and disconnecting two pairs of terminals, said assembly comprising; two contact pads arranged on one surface of a contact block, each of said pads adapted to contact, in a first position, two adjacently located terminals; a magnetically operable switch located in said contact block that provides for electrical connection and disconnection between said contact pads; a boss rotatably connected to said contact block and rotatable between two positions, one of said positions aligning magnet located within said boss with said magnetically operable switch; said boss and said contact block being adapted to rotate together such that each said contact pad contacts, in a second position, to adjacently located terminals.
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Specification