Continuously variable voltage transformer, comprises a toroidal wound transformer with a continuously variable output voltage 0-260 volts a.c., Input 230 volts a.c. In stout metal protected case, mounted on a metal base with two output terminals, with mains input cable.

For measurement of small quantities of electrical charge. the moving coil is suspended by a phosphor bronze strip, which carries an optically true concave mirror. The coil can be raised, lowered or set to zero by an adjusting knurled knob at top. A knob at back is provided for clampingand releasing the coil. With levelling screws. Resistance Period 

4 mm pin, spring insert, screwed on plastic body
 

12 V, 34 Amphr, car type, each cell provided with external lead connection bar so that each cell can be tapped separately .
 

For charging batteries. In metallic case with ammeter, switch for 6V/12V charging, with output fuse and indicator lamp. Complete with battery terminals and main cable. Operates on 230 Volts 50 Hz.

Housed in superior finished steel cabinets having 4 mm socket terminals, on/off switch, indicator light. double wound transformer & full wave bridge rectifiers, Input : 230 volts A.C. Output : 2,4,6,8,10 and 12 V D.C.

For measuring density of electrolyte in leadacid cells. A hydrometer float is contained in a glass body which is provided with a rubber bulb and a nozzle.
 

Interconnection leads, for BNC plug to 4 mm plug, fitted with strain relief sleeves, 1 metre long.
 

Plugs directly to BNC input socket, with two standard 4 mm socket terminals,

Multistrand copper wire , PVC insulated, colour brown, blue and yellow/green 

With transparent glass body, quick blow type, 20mm long.

Rectangular plastic box with cover to hold 1.5 Volt dry cell, with sockets for output.

Improved design, stackable, rectangular plastic moulding to hold upto four dry cells beneath it, enables use of one, two, three or four cells.
 

Double enamelled, SWG 48, on reel of 50 g net.