Products

For providing momentary contact in electrical circuits which are normally open. Can also be used in morse code applications.

Consists of a bakelite base with two 4mm socket binding post terminals. Circuit is closed with plated spring hard brass strip with insulated knob. Silver contacts.

Robust with clamping screw.

For demonstrating the attraction and repulsion of electric charges.

Consists of a an insulated brass pillar and hook on a base. Supplied with two colored pith balls with strings attached.

For experiments in detection of electric charge and determination of polarity.

Consists of an Erlenmeyer flask 250mL, and a plated rod with a knob of diameter 16mm ( 2/3in) passing through a rubber stopper. A pair of aluminium leaves are suspended from the rod.

More sensitive instrument as leaf deflection is unaffected by air currents or by charges residing on the case. Reacts only to charges which are intentionally brought near or put on them.

Comprised of a box made of aluminium with two transparent glass windows to shut out air currents and a plated metal support rod entering from the top through a polyethylene insulator. Two leaves of thin aluminium foil are suspended from the support rod. Supplied with three pairs of aluminium leaves.

For making temporary one wire electrical connections in low voltage electrical circuits.

Made of brass. With a hole for mounting.

For qualitative and quantitative study of the electrolytic decomposition of electrolytes such as water, hydrochloric acid etc.

Consists of two vertical 50mL, gas-collecting, graduated glass tubes with stopcocks at top and joined by a bridging tube to a reservoir and fitted with a pair of platinum electrodes at the lower ends of the glass tubes. A lead wire connecting the platinum electrode passes through the glass tube for external connections, so that only the platinum electrode comes in contact with the electrolyte. Packed in a styrofoam case. Mounted on a cast iron stand designed for safe clamping. Requires a 6V battery or low voltage D.C. power supply for operation.

To produce high voltage alternating current or pulses of high voltage current from a low voltage direct current source. Suitable for use with gas-filled discharge tubes, vacuum tubes, eudiometers and for general laboratory work.

Comprised of two coils fully enclosed in a polished wooden case with binding posts. Includes adjustable vibrator system, primary current polarity reversal and off-on switch, a condenser enclosed in the box and special alloy contacts. Spark gap at the discharge points can be adjusted by sliding rods back and forth. Requires 6-12 volt power source such as a battery.

Knife switch mounted on a bakelite base.