Mechanical motion detector
First Claim
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1. A mechanical motion detector for operating a switch in response to the rotation of a shaft, the combination comprising:
- a housing which defines a fluid enclosure;
a driving gear disposed within said fluid enclosure and mounted for rotation therein, said driving gear being coupled for rotation by said shaft;
a driven gear rotatably supported by said housing and disposed within said fluid enclosure, said driving and driven gears each having teeth disposed around its circumference which sealingly engage with the walls of the fluid enclosure and which mesh with each other to define two fluid chambers;
a fluid passage formed in said housing and having an inlet to one of said fluid chambers and an outlet to the other fluid chamber;
a pressure responsive valve disposed within said fluid passage and including a spring which generates a force that closes the valve to the flow of fluid through said fluid passage; and
means coupling the housing with the switch for operating the switch when the housing rotates.
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Accused Products
Abstract
A housing defines a fluid enclosure which contains a gear pump having a driving gear that couples for rotation by a shaft. When the shaft rotates, the gear pump forces fluid through one of two fluid passages in the housing against the force of a valve spring. A torque which remains relatively constant over a wide range of shaft speeds is thus applied to the housing, and in reaction the housing rotates to operate an electrical switch.
7 Citations
6 Claims
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1. A mechanical motion detector for operating a switch in response to the rotation of a shaft, the combination comprising:
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a housing which defines a fluid enclosure; a driving gear disposed within said fluid enclosure and mounted for rotation therein, said driving gear being coupled for rotation by said shaft; a driven gear rotatably supported by said housing and disposed within said fluid enclosure, said driving and driven gears each having teeth disposed around its circumference which sealingly engage with the walls of the fluid enclosure and which mesh with each other to define two fluid chambers; a fluid passage formed in said housing and having an inlet to one of said fluid chambers and an outlet to the other fluid chamber; a pressure responsive valve disposed within said fluid passage and including a spring which generates a force that closes the valve to the flow of fluid through said fluid passage; and means coupling the housing with the switch for operating the switch when the housing rotates. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification