MOTION TRANSFORMER
First Claim
1. In a motion transformer for converting oscillatory to rotary motion comprising a ratchet wheel mounted both for oscillatory back-and-forth motion substantially on a diameter thereof and for rotary motion substantially about its center, a pair of stops fixedly mounted for limiting the amplitude of said oscillatory motion, and a pair of pawls engaging the teeth of said ratchet wheel substantially at the ends of a wheel diameter approximately normal to the direction of said oscillatory motion, the improvement comprising a resilient shock-absorbing braking member secured to each of said stops in position to abut the teeth of said ratchet wheel as it approaches each end of its oscillatory path of travel, whereby the motion of the ratchet wheel at each end of its oscillatory path of travel is gently braked to a stop without injury to the teeth.
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Accused Products
Abstract
In a motion transformer for converting oscillatory to rotary motion, comprising a ratchet wheel mounted for back-and-forth oscillation on a diameter and simultaneously for rotation substantially about its center, stops for limiting the amplitude of the oscillatory motion, and pawls engaging the ratchet wheel teeth at diametrically opposite points substantially normal to the direction of oscillatory motion, shock absorbing braking members are provided on the stops in position to abut the teeth of the ratchet wheel as it approaches each end of its oscillatory path of travel to brake each oscillation gently without injury to the ratchet wheel teeth.
7 Citations
8 Claims
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1. In a motion transformer for converting oscillatory to rotary motion comprising a ratchet wheel mounted both for oscillatory back-and-forth motion substantially on a diameter thereof and for rotary motion substantially about its center, a pair of stops fixedly mounted for limiting the amplitude of said oscillatory motion, and a pair of pawls engaging the teeth of said ratchet wheel substantially at the ends of a wheel diameter approximately normal to the direction of said oscillatory motion, the improvement comprising a resilient shock-absorbing braking member secured to each of said stops in position to abut the teeth of said ratchet wheel as it approaches each end of its oscillatory path of travel, whereby the motion of the ratchet wheel at each end of its oscillatory path of travel is gently braked to a stop without injury to the teeth.
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2. A motion transformer according to claim 1 wherein each resilient braking member is a thin flexible lamina secured only at one end to the fixed stop and except where so secured is spaced by a substantial gap from said stop.
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3. A motion transformer according to claim 2 wherein the assembly of ratchet wheel, stops and pawls is mounted in an enclosure and said enclosure is filled with a damping liquid which extends into the gap between each lamina and the adjoining stop and damps the movement of the flexible laminae.
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4. A motion transformer according to claim 2 wherein the flexible laminae are of hard jewel material.
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5. A motion transformer according to claim 1 wherein each resilient braking member is a thin flexible lamina secured at both ends of the fixed stop and except where so secured is spaced by a substantial gap from said stop.
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6. A motion transformer according to claim 6 wherein each resilient braking member where it abuts the ratchet wheel comprises a hard jewel material.
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7. A motion transformer according to claim 1 wherein each resilient braking member comprises a soft elastic material secured to the stop and faced where it abuts the ratchet wheel teeth with a hard deformation-resistant material.
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8. A motion transformer according to claim 7 wherein the hard deformation-resistant material is a jewel material.
Specification