Communications: electrical – Systems – Periodic or flashing
Patent
1995-04-21
1996-10-29
Mullen, Thomas
Communications: electrical
Systems
Periodic or flashing
340628, 340693, 315241P, 315241R, 315241S, G08B 500
Patent
active
055700772
ABSTRACT:
A drive circuit for use with an ambient condition detector limits heat dissipation and associated temperature rises in the presence of varying RMS values of an applied AC signal. The drive circuit includes a voltage doubler with a current regulator located between first and second storage elements. In the presence of a sensed ambient condition, which exceeds a predetermined threshold the regulator is enabled permitting one of the storage elements to be charged to a voltage on the order of twice the peak value of the applied AC voltage. A digital timer is used to trigger a flashable visual indicator from the stored DC voltage. The regulator provides a substantially constant DC voltage to the visual indicator in the presence of a varying AC line voltage.
REFERENCES:
patent: 3822393 (1974-07-01), Karpol
patent: 4283657 (1981-08-01), Gordon et al.
patent: 4459005 (1984-07-01), Harvey
patent: 4754416 (1988-06-01), Adams et al.
patent: 4763114 (1988-08-01), Cota
patent: 4900990 (1990-02-01), Sikora
patent: 4952906 (1990-08-01), Buyak et al.
patent: 5016038 (1991-05-01), Kobayashi et al.
patent: 5019805 (1991-05-01), Curl et al.
patent: 5128591 (1992-07-01), Bocan
patent: 5177461 (1993-01-01), Budzyna et al.
patent: 5250977 (1993-10-01), Tanaka
patent: 5293242 (1994-03-01), Mamiya
patent: 5400008 (1995-03-01), Toohey
Frynetics Inc./Ventek, Inc., Visual Alert Product Brochure--4 pages.
Maple Chase, Firex Smoke Alarms Catalog Insert--1 page.
Whelen Engineering Company, SD/VSA Product Information Brochure--2 pages.
Canterbury, Elektro, 10:776 (1904)--1 page.
BRK Brands, Inc.
Lee Benjamin C.
Mullen Thomas
LandOfFree
Ambient condition detector with high intensity strobe light does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Ambient condition detector with high intensity strobe light, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ambient condition detector with high intensity strobe light will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1788649