Motors: spring – weight – or animal powered – Spring
Patent
1988-12-28
1990-03-27
Herrmann, Allan D.
Motors: spring, weight, or animal powered
Spring
74 98, 74437, 74517, 74518, 474117, 474135, F03G 100, F16H 712, F16H 5517
Patent
active
049112686
ABSTRACT:
The invention disclosed herein provides a device which a non-linear force/distance relationship of spring or other device and linearizes it in a range of interest. In accordance with the invention, the device comprises a first gear section and a second gear section. The first and second gear sections are pivotally supported in a meshing relationship. The first gear section includes gear teeth extending about an arc of a first circle having a first center, and the second gear section includes gear teeth extending about an arc of a second circle having a second center. The mating pair of sections comprise a non-circular gearing pair. For limited ranges of motion the non-circular gears can be approximated by eccentrically mounted circular gears. The two gear sections thus pivot eccentrically with respect to each other such that a variable torque or force must be applied to one gear section to obtain a constant torque or force from the other gear section, and vice versa. In a disclosed embodiment, the spring tension/winding angle of a torsion-type spring is linearized. The spring has a first end fixed against movement and a second end coupled to one of the gear sections. In a range of interest, a constant torque may be obtained from the second gear section.
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Herrmann Allan D.
Parks, Jr. Charles G.
Pitchenik David E.
Pitney Bowes Inc.
Scolnick Melvin J.
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