Ammeter

Physics

Accession Number: 2015.ph.652

Instrument Name: Ammeter

Description:

Rectangular black plastic box with a raised glass display. There are two black plastic dials on the face; one is marked with a +. Below the glass display, there is a small glass electrical diode. Underneath the glass of the display, there is a paper sheet with a measurement scale reading “0”, “.2”, “.4”, “.6”, “.8”, and “1”. Below the display it reading from top to bottom: “DIRECT CURRENT”, “MILLIAMPERES”, “SIMPSON ELECTRIC COMPANY”, “CHICAGO, ILL., U. S. A.”. In tiny type, at the bottom reading from left to right, it reads “MODEL NO. 9”, “PAT. NO. 2,051,399”, and “SERIAL NO. 1042”. A black leather strap is connected by metal screws at the top of the box.

Alternative Name: Ampmeter, galvanometer

Primary Materials: Plastic, glass, metal, leather

Markings:

“5071B” is scratched into the plastic face at the top of the display.

Dimensions (cm): Height = 8, Width = 13.5, Length = 20

Function:

This is a device for detecting and measuring electrical current.

Condition:

Good. There are minor surface scratches and some leather decay but nothing significant.

Manufacturer: Simpson Electrical Company

Historical Notes:

1) RadioMuseum.org. DC Meters Model 9 series. Last accessed February 3, 2015. http://www.radiomuseum.org/r/simpson_dc_meters_model_9_series.html.

  • Donated to UTSIC
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