Accession No

2598

Brief Description

direct reading moving coil pointer mil-ammeter, by Weston Electrical Instrument Company, U.S.A., 1897

Origin

Newark; New Jersey; U.S.A

Maker

Weston Electrical Instrument Company

Class

electrical

Earliest Date

1897

Latest Date

1897

Inscription Date

9-3-1897

Material

wood (two types); metal (brass, white metal (two types)); paper; glass; hide (leather); cloth (felt); plastic (ivorine)

Dimensions

length 168mm; breadth 151mm; height 72mm box length 200mm; breadth 174mm; height 101mm

Special Collection

Provenance

Donated by Imperial College, London, England, 1980.

Inscription

‘WESTON ELECTRICAL INSTRUMENT CO.
NEWARK, N.J., U.S.A.
PATENTED NOV. 6TH. 1888.
NO.
3179’ (white metal plaque on top of instrument)
‘WESTON’S
DIRECT-READING
MIL-AM-METER.’ (dial)
‘PATENTED
NOVEMBER 6. 1888.
NO. 392386 AND NO. 392387.
MAY 14. 1889. NO. 403311.
APRIL 29. 1890.
NO. 426992 AND NO. 427022.
JUNE 10. 1890.
NO. 19895 AND NO. 19896’ (white metal plaque on front of instrument)
‘MA17’ (painted on base and main instrument)

Description Notes

Portable pivoted coil pointer DC ammeter. Etched brass case on wooden base; two brass terminals, one marked ‘+’. Glazed window showing mirror and white dial; hand-printed scale divided 0 - 1500, numbered by 100, subdivided to 10.
In wooden carrying case with leather handle; specification certificate on inside of sliding lid, signed and dated ‘March 9th 1897’.

Condition good (leather handle of box broken); complete.

References

Events