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United States Patent | 3,900,251 |
Doyle , et al. | August 19, 1975 |
The invention is directed to a synchronizer for a sound and motion picture recording system utilizing separate sound and motion picture apparatus. In a sound motion picture system, the synchronizer operates to generate a driving voltage for the sound recorder motor, which is representative of the phase difference between synchronizing (sync) signals derived from the motion picture camera and reference signals which are derived from the sound recorder. A phase locked system is provided which matches the sync and reference signals and thereby synchronizes or matches the sound recorder to the sync signals.
Inventors: | Doyle; Robert O. (Cambridge, MA), Kirsch; Jordan (Cambridge, MA), Thomis; Wendl (Fort Lee, NJ) |
Assignee: |
Super 8 Sound, Inc.
(Cambridge,
MA)
|
Appl. No.: | 05/456,035 |
Filed: | March 29, 1974 |
Current U.S. Class: | 352/12 ; 352/19; 352/22; 352/31 |
Current International Class: | G03B 31/00 (20060101); G03B 31/04 (20060101); G03b 031/00 () |
Field of Search: | 352/12,19,20,22,31 |
3583796 | June 1971 | Colodner |
3722987 | March 1973 | Cap |