| 摘要 |
1,013,693. Control of motors. WILMAR CASTLE CO. June 12, 1962 [Sept. 21, 1961], No. 22600/62. Heading H2J. [Also in Divisions E2 and F2] The door of a steam sterilizer is operated by a reversible electric motor 46, the opening and closing cycles being started by a manual switch 95. A pressure switch 124 prevents the door from being opened if the pressure inside the sterilizer exceeds a predetermined safe level, and the opening cycle is stopped by a limit switch 102 controlled by the operating mechanism (see Divisions E2 and F2). When the switch 95 is moved to "close" the motor circuit is completed through switches 104, 106 and the door is rotated from its fully open position to an ajar position on its seating. Hook clamps are then moved to engage the door and force it against its seating, these hooks carrying a switch 111 which is closed only if the hooks are properly engaged with the door. The switch 104 is opened when the door reaches the ajar position, so that if the hooks are properly engaged the motor circuit remains unbroken until the door is fully clamped, when a limit switch 106 opens. This switch also closes the circuit through the controls 108 (not described) which regulate the sterilizing operations. The closing door may be arrested in the ajar position by opening a manually controlled switch 109. A circuit breaker 122 opens if the motor stalls as the result of an obstruction in the path of the door or the hooks. |
