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:
Dec. 20, 1977
Filed:
Aug. 02, 1976
Richard C Kee, Chestnut Hill, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
An electronic flash accessory is provided for a camera of the type having a flash socket assembly adapted for receipt of a conventional multiple flash bulb array together with circuitry for sampling the terminals of the flash socket which are adapted to connect to the last flash bulb scheduled to be fired in the array and for providing a signal which operates to inhibit camera operation when the sampled impedance of the last flash bulb scheduled to be fired is substantially different from the impedance of an unfired non-defunct flash bulb. The electronic flash accessory includes circuitry responsive to a predetermined event relative to the readying of the flash accessory in expectation of the commencement of a photographic exposure cycle involving an artificially illuminated subject for simulating the impedance of an unfired non-defunct flash bulb in order to enable the camera to automatically perform a photographic exposure cycle upon actuation by the camera operator.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile