Film-Tech Forum ARCHIVE: Cinemeccanica part # required

This is topic Cinemeccanica part # required in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

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Posted by Rick Long (Member # 213) on 01-26-2003, 08:10 PM:

I am looking for the part number of the electric dowser solenoid for a Victoria 8 projector. This is the one that lifts the #115 safety dowser assembly (momentary pulse, 110-volt).

Thanks for any help.

Posted by John Walsh (Member # 168) on 01-26-2003, 08:48 PM:

I think it's 525 - Solenoid assembly. Look at the V8 manual in the manual download section - page 24 Fig.19.

Posted by Gordon McLeod (Member # 33) on 01-26-2003, 10:44 PM:

Wolk used to have an essany replacement that would fit right in

Posted by Rick Long (Member # 213) on 01-26-2003, 11:48 PM:

Thank you, John. Must of missed that one, first time around.

Posted by Mark Gulbrandsen (Member # 72) on 01-27-2003, 08:48 AM:

Rick, Why not just bolt a Kelmar C/O right in place of it. Call them and discuss it with Tom. I bet it would work well. We've been installing them in DP-70's with great results...
Mark @ Claco
www.clacoequipment.com

Posted by Gordon McLeod (Member # 33) on 01-27-2003, 11:36 AM:

The problem with the Kelmar is they use a straight rod to lift the dowser plate on the cinemcainca vic8 the cable acually curves down around the shutter to the changeover plate

Posted by John Walsh (Member # 168) on 01-27-2003, 05:11 PM:

"Must of missed that one, first time around."

At first, I did too. I've worked on several V8's and I've never seen one with that shutter used actually used as the c/o - just used for fire-safety. I would think that the c/o would look kinda poor, because there's a delay while the outgoing shutter drops, since it's only gravity-pulled.

The V8 "zipper" style c/o shutter was the fastest one I've ever seen. WHAMM! Almost too fast; screws loosen on it. I also liked the microswitches they put in the "zipper" style solenoid - has come in very handy.

Posted by Mark Gulbrandsen (Member # 72) on 01-27-2003, 07:33 PM:

Gord, The Kelmar can be easily modified for cable drive!!!
Mark

Posted by Gordon McLeod (Member # 33) on 01-27-2003, 08:48 PM:

Why reinvent the wheel when the original one is faster than anything on the planet

Posted by Mark Gulbrandsen (Member # 72) on 01-27-2003, 09:22 PM:

He'd be likely to have alot less trouble in the long run.....
Mark

Posted by Rick Long (Member # 213) on 01-27-2003, 11:26 PM:

Okay, this is not intended for change-over operation. This solenoid is part of a kit put out by Cinemeccanica about 20 years ago for Vic 8's operated with a platter and remote-start automation. Formerly the problem was how to lift the safety dowser automatically.

It consists of two solenoids, one larger, which lifts (actually pushes the lever down from the non-operating side) the safety dowser. The other activates the "de-latch" mechanism that the upper-feed loop-guard is attached to.

This projector is also equipped with the Cinemecannica lever-type change-over unit (lever-type).

The manager here beleives (and he is quite right) that a longer useful bulb life can be achieved if the bulb is left on during operating hours. This theatre runs noon - midnight, with intermissions of under half an hour.

The problem is that on a Vic 8, the shutter is between the safety dowser and the change-over blade. If he leaves the lamp on during intermission, he eventually pays for a rather expensive service call (5 hours travel just to get there, an hours work and another 5 hours return) just for me to replace the now badly-warped shutter. The safety dowser, in other words, protects the shutter.

In several of his other auditoriums he operates this way and it seems to work fine for him. In this particular auditorium i tried to use a ceramic capacitor to prevent the emf pulses from this coil pulsing the CPA-10 automation. The cap, wired across the start switch eventually succumed to the collapsing pulse from this coil and shorted, turning the coil into a black motlen mess.

Posted by Gordon McLeod (Member # 33) on 01-28-2003, 09:21 AM:

Put a small resistor in serries with the cap to make a better snubbing circuit