Browse Items (3473 total)

a general purpose mercury glass total immersion thermometer scale 0 to 200deg C. In clear plastic case, cat No.10046

a circular brass cased milliammeter mounted on a circular wooden back plate fitted by heavy brass clamps to a black painted pedestal on a circular wooden base. The scale is 5-0-5 milliamps. A rotary switch marked 1-10-0 aligns with a pointer on the…

Bellows camera with rectiligne lens and perspective adjustment slides. With 7 holders for their plates .

On top in white ' TYPE 4190A / MICROHENRYS No. 128,618 ' . 2 chrome terminals on top. In wooden box.

Wooden box with grey metal top and 6 adjustable plugs . Company logo on top, ' TYPE 2004 / NON-INDUCTIVE RATIO BOX / Ohms at 20 C. No. 82.034 ' Plugs: 900 Ohms x2, 90 Ohms x2, 10 Ohms x2.

Wooden box with 4 steel terminals (at corners) with large iron central terminal. ' TYPE 4309A ' Patent dated 22/05/1930.

Complete with integral lamp, transformer and scale for general purpose use. Sensitivity: 510 mm / microampere; scale from 5 - 0 - 5 in steps of 0.1. In solid wooden box with company logo on the front. Can be used for measuring voltages.

4 terminal standard resistance in blue-grey metal box with brown insulating top.

Near bottom right ' SWITCH PAT. No. 616684 ' Grey metal top with ebonite (?) knobs. Wooden sides. Patent dated 24/02/1949 "Improvements in electrical fuses for use with switches" by Long & Crawford Ltd.

2 cells in cylindrical container; wooden top. Thermometer hole in centre.