8mm Forum: Elmo synchronizer schematic found

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Topic: Elmo synchronizer schematic found

Robert Oakley
Film Handler

Posts: 46
From: Binghamton, NY
Registered: Dec 2003

posted January 30, 2010 07:09 PM

I found a patent on freepatentsonline.com for an Elmo "PULSE SYNCHRONIZING SYSTEM FOR MOTION PICTURE APPARATUSES" This patent seems to describe the Elmo R-1 Synchronizer which I'm looking for. If anyone can identify the device by this patent please let me know.

Thanks guys

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Steve Klare
Film Guy

Posts: 7016
From: Long Island, NY, USA
Registered: Jun 2003

posted January 30, 2010 07:48 PM

I can't say 100% for sure if it is or not, but what a nice, simple little circuit!

If the schematics had component values it would be easy to build one.

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All I ask is a wide screen and a projector to light her by...

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Martin Jones
Phenomenal Film Handler

Posts: 1269
From: Thetford , Norfolk,England
Registered: May 2008

posted January 31, 2010 03:27 AM

This seems to describe the principles rather than a specific product. There have been many devices using this principle; in the UK the Craven Syncrodeck in both it's mechanical and electronic versions were well known, controlling the projector speed from pulses on reel to reel magnetic tape, and the Cresta models for both reel to reel and cassette tape.

Martin

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Retired TV Service Engineer
Ongoing interest in Telecine....

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