| 摘要 |
885,889. Excessive current prevention. MIDLAND ELECTRIC MANUFACTURING CO. Ltd. March 21, 1960 [March 26, 1959], No. 10511/59. Class 38(4). [Also in Group XXXVII] Two thermal switches have their heating coils r connected in series with each other and with the normally closed contacts h, k of one switch in a supply circuit for lamps v. Excess current first closes contacts h, k of the second switch to operate a signal device u such as a lamp and, if continued, then opens the first contacts to break the supply circuit. Each switch may be somewhat similar to that disclosed in Specification 760,970 (Group XXXVI). |
