Patent GB-278707-A (GB)
Title: Apparatus for registering the time integral for a quantity varying with the time
IPC: G01F15/075
Filed: 1927-10-03
Abstract: 278,707. Telefonaktiebolaget L. M. Ericsson, (Assignees of Jacobsson, F. M.). Oct. 9, 1926, [Convention date]. Integrating. -In integrating apparatus for meters wherein valves are registered according to the number of time intervals during which the values in question have been reached or exceeded, a switching device driven by the meter directly or indirectly and restored to an initial position under the control of a clockwork is adapted to actuate a number of counting-devices, the number actuated depending upon the limiting values of the time-integral of the quantity. In one form, as shown in Fig. 3, a kilo-watt-hour meter 20 is provided with a contact device and a rotating part of the meter is adapted to operate said contact device to send impulses to an electromagnet 8 the armature 10 of which carries a pawl 9 to transmit the impulses to a ratchet wheel 1 constituting one member of the switching device. The wheel 1 is controlled by a spring 5 and is normally held by means of a pin 6 against a fixed stop 7. A retaining pawl 12 is provided to hold the wheel 1 in operated position and a spring controlled lever 14, operated by the armature of an electromagnet 13 controlled by a clockwork 21, is adapted to release the pawls 9, 12 to permit the wheel to return to normal position. The wheel 1 carries a spring controlled pawl 15, Fig. 4, which after a predetermined number of impulses is adapted to actuate the toothed wheel 16 of one or more counters 3 arranged an a stationary plate 2, depending on the value of the quantity during the period. The ratchet wheel may be replaced by a rotating arm of the meter which arm is adapted to actuate the counter successively. In a modification, Figs. 5 and 7, the impulses are transmitted to a ratchet wheel 35 by means of a pawl 37 pivoted to the armature of an electromagnet 36; the ratchet wheel 35 is mounted on a shaft 34 having a pulley 32 over which passes an endless chain 31 carrying a carriage 25 guided on rods 23, 24 and provided with an arm 22 having a screw engaging the slot of a shaft 26. The arm 22 co-operates with the actuating arms 47 of the counters 3 and is rocked to effect their actuation by means of an arm 43 on the shaft 26 engaging a spring controlled member 46 once during each revolution of the pulley 32. Release of the carriage 25 to a position determined by an adjustable stop 42 is effected by an electromagnet the armature of which rocks a member 39 to withdraw the pawl 37 and retaining pawl 38. In another modification, Fig. 8, the counters are electromagnetically operated each counter being provided with a swinging contact 49 which normally engages a contact 51 of a pair of contacts 50, 51. The impulse electromagnet 57 actuates a ratchet wheel 61 provided with a cam disc 58 and a heart cam 64. To the heart cam is attached one end of a spring 66 which after one revolution is suddenly turned to complete a revolution by means of the spring 66 and a spring controlled arm 65. During this latter movement the cam disc 58 momentarily closes contacts 59, 60 so as to complete the circuit of one or other of the counter electromagnets 48 to actuate the counter spindle 55. As shown in Fig. 8, the first counter has been actuated and the armature 54 by engaging a proiection on an arm 53 attached to the contact 49 has moved that contact into engagement with contact 50 to close the circuit of the second counter. Restoration of the parts to normal position is effected by a solenoid 67 and spring- controlled rod 68 to which is pivoted a number of one-way pawls 69 and a lever 70 co-operating with the arms 53, operating pawl 62, and retaining pawl 63 respectively The Specification as open to inspection under Sect. 91 (3) (a) comprises also a form wherein the counters are actuated according to the maximum value attained during the time intervals, the arms 47 are elongated as shown in Fig. 9 (Cancelled), and the shaft 26 with the arms 22 are rocked by an arm 43 connected by pin and slot means to the members 39 controlled by the restoring magnet as described above. This subject-matter does not appear in the Specification as accepted.