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:
Jun. 28, 1977
Filed:
Nov. 07, 1974
William R Wray, West Roxbury, MA (US);
Polaroid Corporation, Cambridge, MA (US);
Abstract
A sound recording and reproducing system comprising a motion picture camera in which there is a synchronization system for recording segments of sound from a signal produced by a microphone associated with the camera as analog samples alternatively read into each of two analog shift registers in increments of samples corresponding to one frame time of the taking picture cycle. Means are provided for recording each such approximately timed sample sequence onto the film adjacent the frame being photographed during pulldown of the film in the camera. For playback, a projector is provided which comprises two analog shift registers each alternatively used for taking the samples recorded on the film for each frame for storage during pulldown, and then to transmit the stored samples through a filter to a loud-speaker for reproduction at a continuous rate during projection of the photographic images recorded on the film.