Inertia and inductance switches
First Claim
1. A switch comprising:
- a housing including a passageway therein;
a magnet mounted within and movable along said passageway;
a stopping pin for preventing possible movement of said magnet until removed; and
a coil mounted in said housing such that is comprises a spiral around at least a portion of said passageway;
wherein movement of said magnet along said passageway and into said coil causes conduction of a current thereby producing a signal pulse.
1 Assignment
0 Petitions
Accused Products
Abstract
A switch device which includes a magnet movable within a passageway. A wire coil is provided about the passageway such that, as the magnet moves into the coil, a current is induced, thereby providing a signal pulse. The switch can be utilized for sensing changes in inertia, with a stopper opposing movement of the magnet unless the magnet imparts sufficient force against the spring biased stopper to allow the magnet to move along the passageway. The biasing force of the stopper can be adjusted to adjust the amount of force, acceleration or deceleration required for actuating the switch. The switch may also be utilized without the spring-biased stopper, with the magnet preloaded with a spring or weight, such that the switch automatically operates upon removal of a safety pin.
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Citations
25 Claims
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1. A switch comprising:
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a housing including a passageway therein; a magnet mounted within and movable along said passageway; a stopping pin for preventing possible movement of said magnet until removed; and a coil mounted in said housing such that is comprises a spiral around at least a portion of said passageway; wherein movement of said magnet along said passageway and into said coil causes conduction of a current thereby producing a signal pulse. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A switch comprising a housing including a passageway therein:
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a magnet mounted within and movable along said passageway; a coil mounted in said housing such that it comprises a spiral around at least a portion of said passageway; and means for opposing movement of said magnet along said passageway unless said magnet exerts a predetermined amount of force upon said means for opposing movement, said means for opposing movement comprising a spring mounted stopper which at least partially projects into said passageway, and wherein a predetermined inertial force of said magnet causes said stopper to move in opposition to the spring bias to allow the magnet to move along said passageway and into said coil. - View Dependent Claims (9, 10, 11, 12)
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13. A switch for sensing changes in inertia comprising:
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a housing having a passageway therein; a mass disposed within and movable along said passageway; a restraint extending at least partially into said passageway for restraining movement of said mass unless said mass exerts at least a predetermined amount of force upon said restraint comprising a stopper which is spring biased into a position at least partially extending into said passageway; said housing further including a channel at least substantially perpendicular to said passageway, wherein the spring for biasing said stopper is disposed within said channel, and wherein a portion of said channel adjacent to said passageway has a reduced cross-section to prevent excessive protrusion of said stopper into said passageway. - View Dependent Claims (14, 15, 16, 17, 18)
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19. A switch for sensing changes in inertia comprising:
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a housing having a passageway therein; a stopper which is spring biased to at least partially extend into said passageway; a magnet disposed within said passageway and movable along said passageway only upon application of a sufficient force by setting said magnet upon said stopper; a coil disposed such that it forms a spiral around a portion of said passageway such that as said magnet moves along said passageway a current is induced in said coil; and a channel extending at least substantially perpendicular to said passageway, and wherein the spring for biasing said stopper disposed in said channel. - View Dependent Claims (20, 21, 22, 23, 24, 25)
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Specification