Accession No

4628

Brief Description

Hall Effect Device, model BH700, by Bell Inc. and Bell Hall-Pak, U.S.A., c. 1950 - 1962

Origin

U.S.A.; Ohio; Columbus

Maker

Bell Inc. Bell Hall-Pak

Class

electrical; demonstration

Earliest Date

1950

Latest Date

1963

Inscription Date

Material

plastic (perspex); metal (copper, other); paper (cardboard

Dimensions

circuit board length 77mm; width 104mm; Perspex box width 180mm; depth 30mm

Special Collection

Provenance

Donated on 25/07/1997.

Inscription

on circuit board,
“[fw---------BELL]INC.”
“COLUMBUS, OHIO”

Description Notes

Model BH700. The Hall effect is the generation of a voltage across opposite edges of an electrical conductor carrying current and placed in a magnetic field. It is a semi conductor device. The object consists of an introduction and instructions booklet “the hall effect and its applications”, a leaftlet “BELL HALL-PAK” “Hall Effect Devices” which gives a schematic representation, mechanical specifications and a list of products available, the circuit board, two magnets, and a tube containing the hall voltage output leads - red and neutral, and a model no card. There is a card envelope that fits over the perspex box.

Condition Good; complete.

References

Events