Patent GB-358895-A (GB)
Abstract: 358,895. Electric selective signalling systems. SIEMENS BROS. & CO., Ltd., Caxton House, Tothill Street, and BROOME, J. H., 64, Heathwood Gardens, Charlton, both in London. May 28, 1930, No. 22293/31. Divided on 357,616, [Group XIX]. [Class 40 (i).] The sections, one for each denomination, of an electrically controlled indicator for use with totalizators, score boards and the like, normally display a blank surface, sections showing blank faces being operatively moved to display a zero digit when the section of a higher denomination is operated. The control arrangements are described as applied to the indicator of Specification 357,616, [Group XIX], three sections only being shown. UC, TC, HC are respectively, the units, tens, and hundreds indicator control switches adapted to line up with the corresponding denominational counter switches cu, ct, ch operated as in Specification 339,591, [Class 106 (i), Calculating &c.], thereby operating the clutch magnets IU, IT, IH to advance the corresponding indicator sections. Contacts iu1, iu2; it1, it2; ihl, ih2 are intermittently operated (once per revolution) by the clutch driving member contacts iu1, it1 .. being closed while iu2, it2, .. are open and vice versa. Contacts iu3, it3, ih3 are closed each time the respective section of the indicator is operated to display a fresh digit. Operation. When betting commences the wipers cu, ct, ch; ucl, tc1, hc1 being at normal, the clutch driving members are started and rotate continuously, and, in the units section, a relay U is energized when contacts iu1 close, over wiper cu, contact a1, wiper uc1, and contact iu1, locking up over contacts u1. Contacts u2 break the circuit of the indicator clutch magnet IU the blank face of the indicator corresponding to the normal position of the switch UC remaining displayed. Should three units, say, be now registered on switch cu, corresponding to its fourth contact, the circuit of relay U, which locked also over contacts iu2, u2 will be broken when the contacts iu2 are interrupted, whereupon contacts u2 will close the circuit of magnet IU. The driven member of the indicator (units section) will be clutched to the driving member advancing the indicating band to alter the display from blank to zero, 1, 2, .. The contacts iu3, being closed at each advance of the indicator section energize the driving magnet UC which advances the wipers uc1, uc2, uc3 step by step with the indication displayed. When the wiper uc1 reaches its fifth contact, the relay U is again energized over wipers cu, uc1 and contacts iu1, locking as before over contacts u1, and u2, iu2. The clutch driving magnet IU is de-energized, the indicator coming to rest to display the digit three. When the indicator control switch moved from normal, the relay A was energized over key RK, wiper and bank uc2, and locked up over contacts a2. Contacts a1 are operated, and thus ensure that the units indicator section cannot again come to rest showing a blank face, but will, if the wiper cut is on the first contact, line up therewith, that is the wiper uc1 will come to rest on its second contact to display a zero. The higher denominational indicator sections are similarly operated, but, should a hundreds bet, say, be registered before one of a lower denomination, the hundreds control switch HC in moving off normal energizes a relay C over wiper hc2 ; which locks up over contacts c2, and, at contacts c3, energizes a relay B which locks up over contacts b2, and in turn similarly operates relay A. Contacts a1, b1, c1 are thus operated and cause the corresponding indicator sections to be stepped to their second contacts to display zero, the hundreds section being stepped further according to the bets registered thereon. Resetting. The reset key RK is opened, deenergizing relays A, B, C, and the counter switches cu, ct, ch, .. restored to normal, whereupon the indicator control switches line up therewith, coming to rest on their first contacts to display the blank faces, as the contacts a1, b1, c1 again mark these contacts. The wipers uc3, tc3, hc3 connected in a circuit ON common to all indicators show at a central office when the switches are off-normal. In the case of a score indicator the wipers and banks cu, ct, ch would be replaced by appropriate keys.