G - Physics – 04 – F
Patent
G - Physics
04
F
328/188, 342/19,
G04F 1/00 (2006.01) H03K 17/292 (2006.01) H05B 37/02 (2006.01)
Patent
CA 1209228
- 1 - TITLE An Electrical Timing Control Switch. ABSTRACT An electrical timing circuit for controlling the activation and deactivation of an electrical load by setting a predetermined time period for which the load will be on and for providing one or more short warning periods wherein the load is deactivated prior to the expiration of the predetermined time period. The in- vention may be used as a switch for a light whereby the light may be actuated to remain on for an hour, but just prior to the expiration of hour period the light will momentarily go off for one or more warning periods prior to the light being turned completely off so that the switch may be reaetuated to start another timing period. Momentary switches (12) control a set-reset circuit (16) which sends a signal to a NAND gate (18). A timing circuit (20) is responsive to the momentary switches (12) to provide a plurality of time spaced-signals. A first gate means (22) responds to the timing circuit (20) to provide an input to the summing gate (18) to effectively turn the load off, but only for short warning periods. A second gate means (24) is responsive to both the first - 2 - gate means (22) and the timing circuit (20) to provide an input to the set-reset circuit (16) to effectively turn the load off at the end of the predetermined period.
437679
Hochstein Peter A.
Shih Kelvin
Hochstein Peter A.
Shih Kelvin
Smart & Biggar
LandOfFree
Electric timing control switch does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Electric timing control switch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Electric timing control switch will most certainly appreciate the feedback.
Profile ID: LFCA-PAI-O-1339246