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. 08, 1980
Filed:
Oct. 28, 1977
Richard Wick, Munich, DE;
Eduard Wagensonner, Aschheim, DE;
AGFA-Gevaert, A.G., Leverkusen, DE;
Abstract
The film is provided with an audio track comprised of recorded sections alternating with unrecorded sections. An adjustable mixer having first and second inputs is connected to the input of the sound-reproducing unit. A first signal-transmission path extends from the output of the audio head for the audio track to the first input of the mixer. A second signal-transmission path extends to the second input of the mixer and transmits a second audio signal thereto. A control head located upstream of the audio head senses the presence or absence of recorded information on the audio track and controls the operation of an attenuator connected in the second signal-transmission path. The control head is connected to the attenuator via a time-delay circuit which introduces a time delay corresponding to the distance between the two heads. The second audio signal is derived from a second audio track on the film, which bears recorded audio information along its entire length, or is derived from an uninterruptedly operated magnetic-tape playback machine or phonograph. During reproduction of the audio information on the recorded sections of the main audio track, the transmission of the second audio signal to the mixer is automatically attenuated.