GB227813A - Maximum demand indicator and signalling device for electricity meters - Google Patents

Abstract

227,813. Landis et Gyr Soc. Anon. Jan. 14, 1924, [Convention date]. Addition to 206,505. Special quantities, registering.-A meter having adjustable means for actuating a signal from the time when a predetermined consumption is exceeded until the end of the recording period, as dedescribed in the parent Specification, is constructionally modified as shown. On the spindle 4 is rigidly mounted a three-armed hub 5, one arm 6 serving to drive, the maximum pointer 2. Resting on the hub 5 is a loosely-mounted cam-disc 7, which is clamped between the arm 6 and an arm 8 by a screw 10 passing through a slot 11 in the disc. A bell-crank lever 13, 14 is provided with a roller 15 engaging the cam edge of the disc 7 and having a projecting spindle 13 which normally lifts a blade spring 7<1>. When the predetermined maximum consumption is exceeded, the cam 7 causes the bell-crank lever to ,close a contact 17 actuating the signal, the spindle 18 being pushed beyond the edge of the blade spring 7<1>, which thereupon drops and locks the lever in its contact-closing position. On the return of the cam-disc 7 to the zero position at the end of a recording period, a projection 9 on the arm 8 lifts the spring 7<1> and allows the roller 15 to pass under it and engage the cam 7, the contact 17 then being opened.