Switching control apparatus for intercom-telephone sets

Details Switching control apparatus for intercom-telephone sets Switching control apparatus for intercom-telephone sets

1987-02-24

1988-12-27

Brown, Thomas W.

Telephonic communications

Substation or terminal circuitry

For loudspeaking terminal

379160, 379412, H04M 908

Patent

active

047946407

ABSTRACT:
A switching control apparatus for intercom-telephone sets includes a switching control circuit and a surge protection circuit electrically coupled with a talking circuit for increasing the reliability of the intercom-telephone operation, reducing the cost of manufacturing the product and protecting the intercom-telephone sets against high voltage surges which may damage the intercom-telephone sets during electrical storms.

REFERENCES:
patent: 3896275 (1975-07-01), Wilson
patent: 4091244 (1978-05-01), Chu et al.
patent: 4360710 (1982-11-01), Chaput et al.
patent: 4475012 (1984-10-01), Coulmance

Affiliated with

Also associated with

Rating

Switching control apparatus for intercom-telephone sets does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Switching control apparatus for intercom-telephone sets, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Switching control apparatus for intercom-telephone sets will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-873530