The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jan. 10, 1978
Filed:
Nov. 16, 1976
William J Malinowski, Pembroke, MA (US);
Chloride Incorporated, Tampa, FL (US);
Abstract
A smoke detector operating on the reflected light principle, utilizing a pulsing light source and means requiring several consecutive pulses of light reflected from smoke to actuate an alarm. During normal standby operation, the light pulses at a predetermined slow rate. When smoke is present, the first pulse of light reflected from the smoke causes the pulse rate to increase for a predetermined number of pulses or for a predetermined short time, so that the number of reflected pulses required to actuate the alarm are received in a shorter time. The time to alarm is thereby shortened without increasing the current drain of the device and without shortening the life of the pulsing light source.