GB247145A - Improvements in or relating to electric elevator systems - Google Patents

Abstract

247,145. Waygood-Otis, Ltd., (Assignees of Lindquist, D. L., Dunn, E. L., and Larson, D. C.). Feb. 3, 1925, [Convention date]. Electrically - released switches; e l e c t r o magnetic switches. - Relates to switches for use in a push-button lift system. The retaining magnet for the push bottons 652 .. of a lift control comprises a rectangular coil 67, Fig. 3, arranged in iron channels 648, 649 and secured to an insulating base 650. The switches 652 .. 658 for the even floors are pivoted on a shaft 660 and their armatures 661 extend over the channel 649. The switches for the other floors also are mounted on the shaft 660, but their armatures extend over the channel 648. The button 665, Fig. 7, and contact lever 673 are pivoted on a pin 672 extending across an aperture in the armature 661. The lever 673 extends through a slot in the button, and is engaged by a spring 675. The upward movement of the armature is limited by the engagement of its pronged end 667 with the stop 670. When the button is pressed, the armature 661 and lever 673 are moved down together until the lever engages the stationary contact 677. The armature then moves alone until its outer end engages a flange of the channel 649, which forms one pole of a magnet and so retains the switch in closed position. When the coil 67 is de-enexgized, the spring 675 forces up the armature which on coming into contact with the projection 676 on the lever 673 opens the switch. The floor stop switches are mounted on the stop and signal panel 937. The frame 936 supports magnetic cores 939, 940, the former being for the closing coil 296 and the latter for the reset coil 310. The coils are retained in position by a plate 942 on which is mounted a pin 944 forming a pivot for the armature 946, which is extended upwardly to form an operating arm in which is slidably mounted the movable contact 304. The contact block 962 is mounted in a holder 961 adjustably mounted on the panel 937. A pivoted latching member 966 preferably of non-magnetic material is biased bv weights to turn counterclockwise. A projestion 972 on the member 966 co-operates with a lug 973 on the arm 974 of the armature 946 to hold the contacts in closed position. The armature 975 for the lower magnet is pivoted on a pin 964 between the arms of the member 966, and is formed with a lug 976 which carries an adjustable abutment screw 977. The weighted lower end 978 of the armature tends to maintain the armature in unattracted position with the screw 977 abutting against a projection 980 on the frame. A lug 981 on the member 966 is in the path of the weight 978 and is struck as the armature is attracted. The floor signal switches are similar in construction to the floor stop switches, but the arms of the latching member are extended below the weight 978 and carry a movable. contact similar to the contact 304, Fig. 27. A lug on one of the arms is engaged by the weight.