Kenneth J. Campbell - Solana Beach CA Douglas H. Mogle - San Diego CA
Assignee:
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
G01R 1302 G01R 3100 H03K 520
US Classification:
324 96
Abstract:
A digital display system is provided for visually indicating the amplitude of a received signal. A plurality of reference signals incrementally graduated from a low amplitude to a high amplitude is applied as first inputs to a polarity of comparators and the received signal as applied as the second input. The comparators produce an output of polarity commensurate with the instantaneous difference between its inputs and a plurality of series-connected light emitting means, each connected between the outputs of two adjacent comparators, is responsive to a predetermined electrical potential for generating light energy so that the instantaneous amplitude level of the received signal is visually indicated by the actuation of a single such light emitting means at a time.
Headrest Proportional Control For Motorized Wheelchair
The United States of America as represented by the Secretary of the Navy - Washington DC
International Classification:
H02P 768
US Classification:
318 55
Abstract:
A head controlled mechanism for the proportional control of a driven devi A mechanism is provided whereby a control signal is generated proportional to the movement of the head of an operator to control the speed and direction of the driven device.