Browse Prior Art Database

Single Line Seizure for Remote Microphone Network System

IP.com Disclosure Number: IPCOM000078127D
Original Publication Date: 1972-Nov-01
Included in the Prior Art Database: 2005-Feb-25
Document File: 2 page(s) / 29K

Publishing Venue

IBM

Related People

Anderson, TA: AUTHOR [+5]

Abstract

A remote microphone network system typically requires a large cable between each of the remote microphones and the recorder control unit, to accommodate a number of lead wires. In order to reduce the number of lead wires and at the same time substantially eliminate the possibility of two remote microphones seizing a recorder at the same time, an additional circuit is incorporated into the system control.

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Single Line Seizure for Remote Microphone Network System

A remote microphone network system typically requires a large cable between each of the remote microphones and the recorder control unit, to accommodate a number of lead wires. In order to reduce the number of lead wires and at the same time substantially eliminate the possibility of two remote microphones seizing a recorder at the same time, an additional circuit is incorporated into the system control.

A seizure line 1 is connected to all remote microphones to indicate whether the recorder 7 has been seized. When a remote microphone is lifted from its cradle, a cradle hook switch 5 will close and a single-shot 4 will cause a signal to be applied along line 3 to an AND gate. Thereafter, latch 6 is set if lines 1 and 2 are high, indicating that recorder 7 is available for use. Seizure line 1 is immediately thereafter clamped low, to prohibit another remote microphone from seizing recorder 7. If seizure line 1 were low when a remote microphone were removed from its cradle, the output of the AND gate would be low and latch 6 would not be set. As long as one remote microphone is removed from its cradle, another microphone cannot seize recorder 7. Therefore, with this circuit incorporated into the system, a dictator cannot remove a microphone from its cradle and wait for the recorder. The microphone must be replaced on its cradle and again lifted.

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