Browse Items (3400 total)

2 standard cells in blue-grey cylindrical case with 4 black screw terminals. ' No. 77550 Standard Cell / WESTON / TYPE 1149 '

' 1000 OHMS / 0.1 AMPS '

Plate ctd. No 79.764 / STANDARD RESISTANCE / TYPE 1659 1 OHM / 3 AMPS / (ABSOLUTE). Standard resistor in cylindrical metal case.

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

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.

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

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.

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

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.

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