oil drip tray to hold resistance standards
Date: 1880-1910
Inventory Number: 0303
Classification: Resistance Standard
Dimensions:tray: 5.4 × 55.9 × 45 cm (2 1/8 × 22 × 17 11/16 in.)
Accessories: nine resistance standards and one bridge (0302a-i)
Description:
An oil drip tray to hold resistance standards used in electrical testing applications. Device is a rectangular brass tray with a removable grating inside, made of a row of brass rods. The outside is painted black and has a stopcock for draining fluids. Paint on the exterior of the tray is scuffed and scratched.
The tray is accompanied by nine resistance standards and a bridge. It is unmarked and unsigned, though the resistance standards were made by Otto Wolff, and the bridge has a metal label from Harvard Engineering School.