Electrical transmission or interconnection systems – Switching systems – Condition responsive
Patent
1988-01-27
1989-05-16
Shoop, Jr., William M.
Electrical transmission or interconnection systems
Switching systems
Condition responsive
307117, 340562, 361181, H01H 3500, G08B 1326
Patent
active
048312797
ABSTRACT:
A capacitive detecting circuit for detecting transient capacitive changes such as that of a person moving into proximity of a sensing element. A sensing element is coupled to a threshold level controlled amplifier supplied with relatively high frequency signals from an oscillator through a high input impedance. A detector circuit is coupled to the amplifier output to detect D.C. variations in the level control loop caused by transient capacitive changes and provide a control output signal representative of such change.
REFERENCES:
patent: 3549909 (1970-12-01), Adelson et al.
patent: 3641410 (1972-02-01), Vogelsberg
patent: 3651391 (1972-03-01), Vogelsberg
patent: 3666988 (1972-05-01), Bellis
patent: 3899713 (1975-08-01), Barkan et al.
patent: 3919596 (1975-11-01), Bellis
patent: 3927336 (1975-12-01), Carlson et al.
patent: 3965465 (1976-06-01), Alexander
patent: 3984757 (1976-10-01), Gott et al.
patent: 4016453 (1977-04-01), Moennig
patent: 4031408 (1977-06-01), Holz
patent: 4101805 (1978-07-01), Stone
patent: 4119864 (1978-10-01), Petrizio
patent: 4152629 (1979-05-01), Raupp
patent: 4159473 (1979-06-01), Senk
patent: 4210822 (1980-07-01), Wern
patent: 4211959 (1980-07-01), Deavenport et al.
patent: 4213061 (1980-07-01), Conner
patent: 4246533 (1981-01-01), Chiang
patent: 4264831 (1981-04-01), Wern
patent: 4289972 (1981-09-01), Wern
patent: 4289980 (1981-09-01), McLaughlin
patent: 4308443 (1981-12-01), Tucker et al.
patent: 4323829 (1982-04-01), Witney et al.
patent: 4360737 (1982-11-01), Leopold
patent: 4414541 (1983-11-01), Ho
patent: 4636774 (1987-01-01), Galvin et al.
patent: 4760490 (1988-07-01), Murao
Logan Sharon D.
Nartron Corporation
Shoop Jr. William M.
LandOfFree
Capacity responsive control circuit does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Capacity responsive control circuit, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Capacity responsive control circuit will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2325114