Hookswitch bounce resistant telephone hold-mute circuit
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 14, 1985
Grant Date -
N/A
app pub date -
Dec 12, 1983
filing date -
Dec 12, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A hold circuit for use with a single line telephone operable over long or short telephone loops. The included circuit during response to the momentary operation of a manual switch actuates a silicon controlled rectifier to place a resistive load across the telephone line thus allowing the subscriber at the telephone instrument to go 'on-hook'. Subsequent removal of the basic instrument handset from the hook-switch, or of a related extension telephone going 'off-hook', will cause the resistive load to be removed.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Advertisement
Advertisement
Advertisement
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully