Crown Industrial 213 Michelle Court So. San Francisco, CA 94080 Tel: (650) 952-5150 Fax: (650) 873-1495 E-mail: autodor@crown-industrial.com Web site: http://www.crown-industrial.com Number 1276 is for hard use, heavy traffic. The #1275 Aut-o-doR (single sliding) and #1276 (bi-parting) operators were designed for use on top of the gate opening...offering gate security. They are ruggedly built and capable of producing years of trouble-free service in high traffic areas in either indoor or outdoor installation. The operator includes a driving chain, take-up bracket and drive unit all mounted to the overhead superstructure. In the event of a power failure, the operator is equipped with an emergency release located on the gate chain bracket. The motor and limit switch are pre-wired into junction box mounted on the base plate. The sliding gates are operated by a continuous horizontal loop of roller chain mounted to the superstructure above the gate opening, and driven by the sprocket connected to the driving unit. For bi-parting gates, the method of operation is similar. One gate is operated by the bottom roller chain and the other gate is driven by the top chain. Manual operation of the gates is permitted by a disconnecting device attached to the gate. The driving unit consists of an instantly reversible motor with build-in speed reducer, built-in magnetic brake, safety friction disc clutch, limit switch, and reversing starter with overload and underload protection, all mounted on a heavy steel based protected by a weather resistant cover.
1276/1275 Specifications The Electric Gate Operator shall be manufactured by Crown Industrial Operators 213 Michelle Ct., So. San Francisco, CA 94080 Phone (650)952-5150. Operator shall be built into a compact unit mounted on a heavy steel base. Each unit shall consist of a right angle gearhead reversing motor, magnetic brake, safety disc clutch, NEMA rated starter with silver to silver contacts,and a chain driven, NEMA rated, geared type automatic limit switch. The gearhead motor and magnetic unibrake shall be assembled as one unit with one stage of reduction. The geared motor shall be of all cast iron construction. Worm shaft shall be rolled from solid blanks of high alloy 8620 steel. Worms receive polishing treatment to maximize efficiency. Seal contact area is super finished. Output shafts of "stressproof" 1045 alloy, minimum 100,000 psi yield, shall be mounted on heavy duty tapered roller bearings. Double lip oil seals on the output shaft shall operate on super finished shaft areas to assure oil retention and contaminant exclusion. The magnetic brake with its easily adjustable feature shall be assembled to the motor to make a compact and efficient unit. The automatic limit switch, stops the doors in the fully open or closed position, shall be the precision built gear type which is to be operated with a chain drive from the counter shaft with a minimum ultimate strength of 6100 lbs. attached with heavy brackets to the door. A simple releasing feature shall be supplied in case of power failure. The chain shall be driven from a heavy duty dependable safety friction disc clutch on the gearhead motor's counter shaft. This safety clutch shall protect equipment in case the door comes in contact with an obstruction. The door speed shall be 45 FPM. Currect can be 115V, 230V/single phase or 280V, 230V, 460V/3 phase. 3 phase recommended. The operator shall be protected by a weather cover. Guarantee: There shall be a warrranty of 1 year after installation. THE WARRANTY DOES NOT LIMIT THE NUMBER OF GATE CYCLES PER HOUR. | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||