Electro-medical instruments and their management : and illustrated price list of electro-medical apparatus / by Schall & Son.
- Schall & Son.
- Date:
- 1911
Licence: In copyright
Credit: Electro-medical instruments and their management : and illustrated price list of electro-medical apparatus / by Schall & Son. Source: Wellcome Collection.
222/252 page 206
![ament ie\erser, volt and ammeter, double-pole and single-pole switch variable resistance for the spark coil, switch and variable resistance for the motor of the mercury interrupter ; signal lamp, fuses, and terminals. The pegs of the rheostat are protected by glass plate discs, and the ter- minals are insulated, to prevent unpleasant shocks by handling the switch- boards in darkness. Size : 16 in. wide, 23 in. high. The switchboards can also be arranged on tables of enamelled steel, as shown on Fig. 2675A. No. 267S. No. 2677. Large Switchboard, provided with : a variable Series'Rheostat, for instantaneous or tele exposures ; and a variable Shunt Rheostat, to vary the voltage from the main gradually from 40 up to about 140 volts, for time exposures, examination on the screen, or for therapeutic purposes ; [Copy of an unsolicited testimonial.] Sydney, Jan. 28th, 1911. The switchboard (No. 2678) is a dream, the finest piece of work I have ever Dr. Harris. seen.](https://iiif.wellcomecollection.org/image/b28063491_0222.jp2/full/800%2C/0/default.jpg)
