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CV-2 Right Hand: For Use with Retiring Cam

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For Use with  a Retiring Cam
 
The CV-2, Electrical/Mechanical Contact Switch, is intended for the use with Counter-Balanced, Vertical Sliding, Bi-Parting Freight Doors.  It is wired in series with all of the other door switches in the hoistway and the electrical control circuit of the elevator so as to produce an overall electrical safety loop.  In addition to this circuit closing system there is a mechanical latch which locks the bottom door in the closed or up position.  Because the bottom door is latch locked in the up position it will support the upper door should the door connecting chain break.  The CV-2 interlock has two contacts, one for the door and one for the retiring cam.  The retiring cam is a safety feature to insure that the retiring cam has been picked prior to the car moving.
 
*The interlocks are made for Right-hand or Left-hand mounting. The hand is determined by standing inside the elevator looking out. The side the lock is to be mounted (Left or Right) is the hand to be ordered.
 
Description 
These locks are mounted to the door frame inside the hoistway through holes in the casting. The casting or housing includes the contact making assembly, shafts and cam. At the top of the housing is a roller arm shaft with an adjustable roller arm. A conduit connection hole in the bottom of the housing is for wiring to the contact terminals. A cold roll steel cover with gasket is provided for the housing.
 
Operation  
When the elevator stops at the landing the cam on the elevator, stationary or retiring, strikes the interlock roller arm opening the lock. The lower hoistway door then slides vertically downward and the locking bar mounted on the door mechanically opens the contacts. When the door is closed the locking bar closes the contacts.

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