Battery Eliminator

National Company Incorporated, Manufacturer

Circa 1920
See full details

Details


Maker and Role
National Company Incorporated, Manufacturer
Production Date
Circa 1920
Description
A National battery eliminator, type B7180. Black metal, rectangular in shape with angled surfaces below top surface for control panel. Control panel contains 5 dials and 4 semi-circular switches. Ventilation holes in each side. Power cord extends from centre-back of eliminator.
Components of eliminator include: transformer sealed in compound to make it silent, a type 80 rectifier valve, smoothing condensers sealed in compound, voltage divider with a resistance of 11,000 ohms and adjustable tappings for 22 ~ 45, 67 + or -, 90 + or -, and 180 or less volts. These are adjusted on the front control panel.
Media/Materials
Processed Material/Metal
Signature/Marks and Type
National / Type B 7180 / 230 Volts 50-60 Cycles / Manufactured by / National Co. Inc., Malden, Mass, U.S.A. / The National B is licensed / Under R.C.A. patents Maker's Plate
Accession No
1978.338
Credit Line
National Company Incorporated. Circa 1920. Battery Eliminator, 1978.338. The Museum of Transport and Technology (MOTAT).
Disclaimer

The development of MOTAT's online platform is a continual process. Records are updated regularly, with new information and images. There may be mistakes or omissions in the information provided and we welcome input from the public.

 Do you know something about this object? Contact us or comment below.


Be the first to comment.