Spring motor
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United States of America Patent
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May 23, 1989
Grant Date -
N/A
app pub date -
Jan 28, 1988
filing date -
Jan 28, 1987
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A braking device is provided to reduce the speed at which a shiftable spring motor runs down. The braking device includes a pallet which is mounted so that it can oscillate, the pallet having a pair or arms which cooperate with the teeth of an escape wheel 13 which rotates as the spring runs down. The pallet is connected to a pendulum weight. The depth of engagement of the arms of the pallet in the teeth of the escape wheel as well as the amplitude of oscillation of the pallet and/or the pendulum weight connected therewith allow the braking action to be changed and hence the speed at which the motor runs down in one of a plurality of selectable shift positions.
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