Energy storage apparatus
First Claim
1. An energy storage apparatus having a plurality of units for transmitting input power from electric motors to an output shaft, each unit comprising:
- a frame;
an electric motor mounted in said frame;
a main gear rotatable in response to said motor;
a flat spiral spring having one end secured to said main gear, for storing energy upon rotation of said main gear;
means for selectively engaging an output shaft with said main gear; and
a motor control switch engageable with said spring for sensing the contraction and expansion of said spring and for activating and deactivating said motor in response to preselected positions of contraction and expansion of said spring.
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Accused Products
Abstract
An energy storage system having several units for transmitting input power from electric motors to an output shaft, each of the units involving an electric motor, a main gear rotatable in response to operation of the motor, a flat spiral spring secured to the main gear for storing energy when the main gear is rotated by the motor, a device by which the main gear may selectively engage and rotate an output driveshaft when the flat spiral spring rotates the main gear, and a motor control switch that may be engaged by the spring, for sensing the contraction and expansion of the spring, and for activating and deactivating the motor in response to preselected positions of the spring'"'"'s contraction and expansion.
21 Citations
7 Claims
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1. An energy storage apparatus having a plurality of units for transmitting input power from electric motors to an output shaft, each unit comprising:
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a frame; an electric motor mounted in said frame; a main gear rotatable in response to said motor; a flat spiral spring having one end secured to said main gear, for storing energy upon rotation of said main gear; means for selectively engaging an output shaft with said main gear; and a motor control switch engageable with said spring for sensing the contraction and expansion of said spring and for activating and deactivating said motor in response to preselected positions of contraction and expansion of said spring. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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Specification