Motorola Corporation

Lincolnshire Manufacturing, LLC

Harry D Bush

Paul J Weber

Donald Ray McKinney

John W Medernach

George N Kotzamanis

Morris J Danzig

James O Tomaszewski

Ivan A Novak

An improved prosthetic device with a vacuum system for maintaining a negative pressure seal between the socket and the residual limb. The vacuum system includes a vacuum surge chamber which maintains seal vacuum and increases battery life. The system is small, lightweight, and concealable within the prosthetic device so that it neither impedes use of the device nor detracts from a cosmetically accurate limb.

Prosthetic vacuum system

The current invention is a method (100), super-regenerative transceiver (300), and computer system (500) for providing short range communication with reduced current drain. A control unit provides an amplifier 'ON' pulse periodically to a radio frequency amplifier to allow reduced current drain. The radio frequency amplifier eliminates antenna effects in an input signal to provide an amplified input signal. The control unit also provides a receiver 'ON' pulse to a super-regenerative receiver immediately following the amplifier 'ON' pulse to allow reduced current drain. The super-regenerative receiver detects received data given the amplified input signal.

Method super-regenerative transceiver, and computer system for providing

An asynchronously resettable counter/divider (25) in a phase-locked loop (PLL) for a frequency synthesizer (12) reduces the lock-up time for the PLL by resetting the resettable counter/divider when the phase difference between the output signal from a VCO (20, 21) and a low frequency reference signal (30) exceeds a predetermined value.

PLL using asynchronously resettable divider to reduce lock time

A VSWR meter arrangement with a linear scale. The VSWR display is made linear by inputting the V.sub.forward and V.sub.reverse signals to a first op amp-based circuit to provide a first output=K(V.sub.f -V.sub.r). The signals are also input to a second op amp-based circuit to provide a second output=V.sub.f +V.sub.r. The first output is then coupled to the V.sub.reference input of a conventional voltmeter. The second output is then coupled to the V.sub.signal input of the voltmeter. The voltmeter's display output will then indicate the VSWR as a linear percentage of scale.

VSWR meter arrangement with a display output having a linear scale

A method is provided for fabricating substantially vertically aligned patterns of material on the opposed surfaces of a transparent substrate by employing a single external mask.

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Palatine, IL, United States of America

Harry D Bush