Patent GB-380829-A (GB)
Title: An improved electricity meter
IPC: G01R11/56
Filed: 1931-06-15
Abstract: 380,829. Supply meters. LANDIS ET GYR SOC. ANON., 1, Hofstrasse, Zug, Switzerland. June 15, 1931, No. 17287. Convention date, June 17, 1930. Addition to 275,628, [Class 37, Electricity, Measuring &c.]. [Class 37.] In a sliding tariff electricity meter as described in the parent Specification wherein the change over of tariff is effected by trip pin adjustable on a disc driven by the indicating mechanism against the action of a spring and co-operating with a fixed stop, the trip pin 65 is formed integrally with the disc 67 and co-operates with an adjustable stop 69. As shown in Fig. 1, the change over may be effected electromagnetically and effects change over of the gears driving the kilowatt-hour counter 20 of the meter through a change over gear 17, driven from the meter armature, mounted on an arm 79 pivoted at 78 which forms the armature of a magnet 76 energized on the closure of contacts 77 by the rotation of a toothed, spring returned disc 67 provided with a peripheral projection or trip pin 65 and notch 66 and driven from the meter armature by gears 74, 75. An abutment or fixed stop 69 on a graduated adjustable disc 71 engages the projection 65 and may be adjusted to the required position as indicated by the datum mark 10. During consumption of energy the disc 67 is rotated until, after the consumption of a predetermined amount of energy, the projection 65 opens the contacts 77 and changes over the gear 17 to a different ratio for driving the kilowatt-hour counter 24. In this position the gear 75 rotates idly in the notch 66 of the disc 67, which may be reset, by an official by tilting the shaft 73 of the gear 75 to disengage it from.the disc 67. The Specification as open to inspection under Sect. 91 (3) (a) describes a device, Figs. 1 (Cancelled) and 2 (Cancelled), similar to that described in the parent Specification. In this device the kilowatt-hour counting train 24 is driven through gearing 25 by a gear 17 on a shaft 14 alternatively through gears 15, 21, 19, 23 or through the gear 16. The shaft 14 is pivotally mounted in a bearing member 1 and is driven through gears 12, 9, shaft 3, gear 4 and worm 7 from the meter disc 6. A lever 13 mounted-on a rockable shaft 51 is secured to the shaft 14. The shaft 3 also drives a gear 8 which, through gearing 10, a pinion 11 on a pivoted shaft 38 and gear 40, drives a spring-returned toothed disc 39 having discs 44, 44a on either side and a pin 45 passing therethrough. An arm 27 mounted in the shaft 51 is secured to the shaft 38 for engaging or disengaging the gears 40, 39, and one arm of a two-armed lever 56,freely mounted on the shaft 51 engages a detent 52 on a spring- controlled arm 54 pivoted on the bracket 26 of the device and engageable by the pin 45 on the gear disc 39. The lever 56 is controlled by a spring 55 and is pivotally connected to a rod 58 associated with a press button 59 in the casing 60. A stop' 50 on the lever 27 is engageable by one arm of the lever 56. On the gear 39 the outer disc 44 is graduated in kilowatt-hours chargeable at the higher rate and the disc'39 is provided with a marking 47 and a notch 43 engaging a fixed stop 42. In Figs. 1 (Cancelled) and 2 (Cancelled), the predetermined amount of energy at the higher rate has been consumed and the counter 24 is now recording at the normal rate. On pressure of the button 59, the lever 56 is moved to the left in Fig. 2 (Cancelled) against the spring 55 and is held in this position by the detent 52 on the lever 54. The arm 27 drops by its own weight and engages the gears 40, 39, also turning the shaft 51 and engaging the gears 17, 16. The meter now drives the counter at a higher speed and also rotates the gear 39 until, after the consumption of the predetermined amount of energy as indicated on the disc 44, the pin 45 moves the arm 54 and releases the lever 56 which is returned by the spring 55 and lifts the lever 27 and gear 40 away from the gear 39, also rotating the shaft 51 and engaging the lower velocity ratio gears 17, 15. The disc 39 now returns: under spring pressure. This subject-matter does not appear in the Specification as accepted.