Wattmeter

Physics

Accession Number: 2015.ph.644

Instrument Name: Wattmeter

Description:

Black square metal box with with glass window display for viewing watts and nameplate with three screws on each side of the device’s face. There are two small metal knobs near the bottom of the left side of the device and above the bottom knob is a circular protrusion. There are three metal knobs with plastic coating on the left side of the device that are designed to input the voltage with circular protrusion above each. There is a leather handle at the top of the device. On the bottom of the device there are four rubber feet and a ventilation grill.

Primary Materials:

Bakelight, Metal, Leather, Glass, Plastic, Rubber

Markings:

FACE:
Glass window “PAT. AUG. 5.’90, JUNE 26.’92., JAN. 31.’93., JULY 10.’94, AUG. 12.’13., JULY 31.’17.”, “WATTS”, “MAX. VOLTS 200 AND 100 MAX. AMPS. 7.5″, “RES. FOR 150 V 11505 RES. FOR 75 V 5752.5″, “MODEL 432 NO. 4574″
Name plate “WESTON”, “ADJUST”, “MODEL 432 No 4574″, “FOR ZERO”, “WESTON ELECTRICAL INSTRUMENT CORP.”, “NEWARK, N.J., U.S.A.”
Etched under the name plate “1081″

RIGHT SIDE: Written in white ink “II E”. Engraved on the protrusion “±”

LEFT SIDE: Protrusions top to bottom “50″, “75″, “±”

BACK: Screw cap “W”

Dimensions (cm): Length= 6.5 cm Width= 9 cm Height= 6 cm

Function:

Measures elecrical power of a circuit in volts. This portable device was meant to be calibrated by hand.

Condition: Good

Associated Instruments: N/A

Manufacturer: Weston

Date of Manufacture: 1950′s

Provenance:

University of Toronto Physics Department

Donated to UTSIC: Yes