new / RotoRelay • works like #4 \ a motor •
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ELECTRONIC RELAY IJMsBiilMgWefflimBiiMISBllliraj^
Electronic Relay Model #4 is the most important advance in the design of highly sensitive electronic relays for the control of relatively large amounts of power. Every conceivable relay improvement is embodied in this new instrument. I t is designed with the new RotoRelay which employs a mercury-to-mercury contact in a completely sealed steel chamber. RotoRelay employs a sealed mercury switch tube which is tilted to the open-circuit or closed-circuit position by a highly efficient magnetic circuit. There is no sliding plunger within the mercury tube. This means you get positive action . . . no danger of sticking or breaking! The d.c. power input for reliable operation of RotoRelay with a 35-amp mercury tube is less than one watt, compared with four watts for a mercury plunger relay. Also you achieve direct current in the control circuit. You can use unlimited lead wires to your control, making it independent of capacitance changes. The control circuit operates with micro currents. The Electronic Relay Model #4 is in a corrosion resistant case convenient for permanent installation or bench use with a 15 amp line cord and power receptacle. For complete information, write for Bulletin TABLE OF RELAY CHARACTERISTICS — M o d e l # 4 Load Current Control Voltage Control Current Catalogue No.
35 amps. 115 volt AC 7 volts DC open circuit 2 microamps DC closed circuit 24875
The EMILEGCo GREINER Co. ®
Price
115.
2 0 - 2 6 N. M O O R E STREET .
Dept. 2 2 1
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New York 1 3 , New York
For further information, circle number 3 A on Readers' Service Card, page 103 A VOL. 3 0 , N O . 1 1 , NOVEMBER 1 9 5 8
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