Robert P Dimmer DeceasedFlowerfield, IL
Robert Dimmer Phones & Addresses
Lombard, IL
Arlington Heights, IL
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Us Patents
Electronic Tone Ringer
US Patent:
3965307, Jun 22, 1976
Filed:
May 28, 1974
Appl. No.:
5/473852
Inventors:
Robert P. Dimmer - Lombard IL
Assignee:
GTE Automatic Electric Laboratories Incorporated - Northlake IL
International Classification:
H04M 100
US Classification:
179 84T
Abstract:
An electronic tone ringer for use in telephone subsets. Operating in response to and powered from incoming received ringing signals, the ringer circuitry provides audible multitone signals. The circuitry employed eliminates so-called "bell tapping" or "chirping" during dialing.
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