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:
May. 04, 1982
Filed:
Jul. 18, 1979
Applicant:
Inventor:
Dennis R O'Connor, Rochdale, GB;
Assignee:
Chloride, Incorporated, Tampa, FL (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01T / ;
U.S. Cl.
CPC ...
250384 ; 250385 ;
Abstract
This invention is a smoke detector for giving a warning that a fire is imminent. The detector has an ionization chamber with a central electrode which is covered by insulation except at a restricted area closely spaced from a measuring electrode, a second electrode being constituted by a perforated wall of the ionization chamber. The detector is very sensitive to the presence of smoke, because of the concentration of the electric field in the area between the measuring electrode and the exposed part of the first electrode.