Catherine B O'Brien

US Patent:

39327116, Jan 13, 1976

Filed:

Sep 13, 1973

Appl. No.:

5/396758

Inventors:

Gerard J. O'Brien - LATE OF Jersey City NJ
Catherine H. O'Brien - Jersey City NJ

International Classification:

H04R 2102

US Classification:

179142

Abstract:

A vibration transducer, comprising a conductive member, such as a weighted carbon bar loosely fitting into support means, such as a pair of carbon bearing blocks with the bearing blocks rigidly attached to a flexible membrane, serves as the transmitter of the voice transmission system. The bearing blocks are series wired into an electrical circuit, including a direct-current power source and a loud-speaker coil. A fluctuating pressure signal sets the flexible membrane into vibration and causes the weighted carbon bar to bounce in its bearings, thereby alternately interrupting and closing the electrical circuit. The pulsed DC signal passing through the loud-speaker coil reproduces the motion experienced by the transducer membrane in the motion of the loud-speaker cone thereby reproducing the input sound pattern.

US Patent:

39708047, Jul 20, 1976

Filed:

Mar 25, 1974

Appl. No.:

5/454224

Inventors:

Jerry O'Brien - LATE OF Jersey City NJ
Catherine H. O'Brien - Jersey City NJ

International Classification:

H04L 1504
H04R 2100
H04R 2102

US Classification:

179131

Abstract:

This invention describes an electromechanical amplifying sound transducer including a diaphragm which responds to input energy, such as acoustical waves and mechanical pulses, and vibrates in response thereto. Conductive supports mounted onto the diaphragm are adapted to be interconnected to a source of electrical energy. A weighted conductive bar is loosely coupled to the supports and interconnects them. The supports transmit the vibrations to the bar whereby the bar can control the electrical energy delivered from the source of electrical energy so that the acoustic waves or mechanical pulses are converted into amplified electrical waves.