Projection engineering (Jan-Dec 1931)

SEPTEMBER, 1931 Page 29 IN SOUND EQUIPMENT Brand New — Late Models Engineers considering replacement of present amplifying equipment or installation of new equipment for public address systems, centralized radio, etc., will find the necessary components available in this special sale. Amplifiers, loud speakers, transformers, M.G.-sets, rectifiers, etc., offered, will find ready application for laboratory, testing or experimental purposes and can be purchased at considerable savings. Only the finest quality component parts are used in this equipment. l'/2 KW. A.C. to D.C. Motor-Generator Set (1) 1% KW. A.C. to D.C. M.G. set with 110-220 volt, singlephase GO cycle A.C. motor and 125 volt D.C. generator. Suitable for any purpose where A.C. supply is not suitable for power use, i.e.; variable supply motor control, replacement or stand by use for projector drive motors. OUR PRICE $80 oo l'/2 KVA. D.C. to A.C. Motor-Generator Set (1) iy2 KVA. D.C. to A.C. M.G. set (G.E. model 12-A-79) with 3 h.p. 110 volt D.C. motor and lYa KVA., 110 volt, single phase, 00 cycle A.C. generator. OUR PRICE $150"^ MOTOR-GENERATORS Four Unit Motor-Generator Set 1—115 Volt D.C. Motor 1 — 250 Volt D.C. Generator 1 — 15 Volt D.C. Generator 1—500-1000 Volt D.C. Generator DESCRIPTION 1 — D.C. GENERATOR Shunt-wound Speed 1800 Amps. 1.6 KW. 4 Volts 250 1 — D.C. GENERATOR Amp. 67 Sept. Exc. at 250 Speed 1800 volts Shunt-wound KW. Cont. 50 15 volts 1 — D.C. MOTOR Shunt-wound Volts 250 Open continuous Horsepower 5 Amp. 19 Speed 1750 Closed Horsepower Continuous 140 1 — 220 V. 3 ph. 60 cy. motor, A.C. 1 — 250 Volt D.C. Generator 1—15 Volt D.C. Generator 1 — 500-1000 Volt D.C. Generator DESCRIPTION 1 — 55D.C. GENERATOR Shunt-wound 4A 1 Amp. at 500 v. Amp. 1 Volts 1000 Speed 1800 Ajnp. 1 KW. it 1000 v. 1 — INDUCTION MOTOR Volts 220 3 ph. — 60 ey. Amp. 10.1 Speed 1750 1 — GENERATOR Shunt-wound Amp. 67 Volts 15 Speed 1800 1 KW. 1 — D.C. GENERATOR Shunt-wound Volts 230 .4 KW. Amp. 1.6 Speed 1800 1 — D.C. GENERATOR Amp. 1 Volts 1000 Speed 1800 1 KW. Cont. Shunt-wound These units were designed for power supply to main amplifier equipment described on opposite page. It is also suitable for broadcasting stations, centralized radio and public address systems and other equipment where voltage supplied is needed. The 1000 volt generator has 2—500 volt con OUR <£«• g? if\ OO ncctions in series giving total of 1000 volts. PRICE Jb^%3 OUR PRICE Rectifier for Battery Charging (1) 12 Amjero Tungar or Rectigon Recti tier. TUNGAR RECTIFIER Consists of transformer, two Tungar Bulbs, ammeter and line switch, mounted in sheet iron case. RECTIGON RECTIFIER Same as above with charg $/jfl.00 ing rate control knob. fc^v TRANSFORMERS SINGLE-PHASE TRANS OUR FORMER 2KVA. PRICE (1) Transformer, 115/230 to 230/115 volts. 50-60 cycles, 2 $0.00 KVA., single-phase. *^ SINGLE-PHASE TRANSFORMER 1 KVA. °UR PRICE (1) Transformer, 115/230 to 230/115 volts, 50-60 cycles, 1 $E.OO KVA., single-phase. l'/2 KVA. AMERTRAN 1% KVA. 220 volts. 60 cycles, OUR 4 wire, American Trans PRICE former Co. Secondary tap tt m A OO ped at Vz and .866 holt. * A Jb' Starter for l</2 KVA. DC. to A.C. M.G. Set our PRICE 1 Starting; switch, 3 Horse $£» 00 power, 115 volts, D.C. j' BATTERY CHARGERS A.C. Motor Generator Set for Battery Charging Vs KW. Battery Charging M. G. set with 110 volt, single phase, 60 cycles. A.C. Motor. DESCBIPTION A.C. Motor D. C. Generator Speed 1725 18 volt Cycles 60 Amp. 27-8 KW. .5 Phase 1 Speed 1725 Temperature-rise 50% Temperature-rise 50% Time rating continuous Time rating continuous D.C. Motor Generator Set for Battery Charging Vz KW. Battery Charging M. G. set with 110 volt, D.C. motor. DESCRIPTION D.C. Motor Volt IS Speed 1725 Amp. 27.3 KW. .5 Shunt-wound Speed 1725 Temperature-rise 50% Shunt-wound Time rating continuous Temperature-rise 50% D C. Generator Time rating continuous I . '^V 1 These generators are suitable for charging batteries in theatres, broadcasting stations, laboratory, lamp and tube life testing. Also for replacement of present worn out equipment. OUR PRICE $SO .00 Starting Switch for D.C. Generator Set (1) Starting switch, 1 Horsepower, 115 volts, D.C. Motor PRICE OUR 00 $7 Battery Charging Switch (1) 4 pole, double-throw eharg _°,E5j, ing switch. PRICE Trumbull electric Cat. No. «trft OO 70421. *© Selective Switching Panel for A.C. to D.C. Motor-Generator Set our (1) Selective switching panel TMlIOF (W. E. & M. style 95-C-636 for two A.C. to D.C. M-G $XA-00 sets. $30 Fuse Panels for (M.G.)' 'A" and "B 1 Low voltage fuse panel. 1 High voltage fuse panel. OUR PRICE $30.oo Starter for l'/2 KW. AC. to D.C. Motor Generator Set price (1) Starting switch 3 h.p., sin OUR gle-phase, 6© cycle, 110/220 «#■» 00 volts. 3" Control Panel for D.C. to A.C. Motor Generator Set prYoe (1) Control panel (GE-CR2909-Y1) $10-00 CORPORATION Building, NEW YORK CITY, N, Y. GUARANTEE: All equipment is guaranteed to be brand new and in original factory crates.