Excluder device for telephones installed in parallel

Details Excluder device for telephones installed in parallel Excluder device for telephones installed in parallel

H - Electricity

04

M

379/83

H04M 1/72 (2006.01) H04M 1/70 (2006.01)

Patent

CA 1230438

ABSTRACT OF THE DISCLOSURE An exclusion device for excluding other telephones con- nected to a common line when one is in use, comprising a full wave bridge rectifier having two pairs of terminals, one said pair of terminals being for connection in series with a telephone across the common line, a thyristor connected the other pair of terminals, and a voltage divider connected across said other pair of terminals, the mid-point of said voltage-divider being connected to the gate of the thyristor, whereby when no other telephone is in operation, lifting of the telephone handset causes current to flow through the bridge rectifier and trigger circuit, said current triggering the thyristor and thereby permitting operation of said telephone, and when another telephone is in use insufficient current is avail- able to trigger the thyristor whereby operation of said telephone is inhibited.

476309

Affiliated with

Also associated with

Rating

Excluder device for telephones installed in parallel does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Excluder device for telephones installed in parallel, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Excluder device for telephones installed in parallel will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1309925