Browse Items (3473 total)

2 glass disks (1 large, 1 small) with darkened stripes to create a slit effect, able to rotate on metal handle with turning handle and pulley cable spindle. On wooden protective slip. Gives interrupted patterns of light

Black metal apparatus; two individual scales measuring 'knots' and 'MPH'; scales look like glass thermometers - right hand dial 0-150 and left hand dial 150- 550 mph; converts pressure into speed; serial no 81; ref no 6C/85

Small bulb with a frosted window; a "sapphire" window, in a cardboard box.

3 cables for a Hewlett Packard computer; interfacing cable to connect computers to other devices

Clear plastic box with black metal trim. Inside can be seen the workings including two mirrors. On side there is three controls, one with a single unit scale from 0 to 10; fine to coarse. Three sockets, labelled as A.C. Mains, Ext. Recorder, D.B.…

a total immersion glass thermometer non linear scale -200 to +25deg C. In blue card tube. Top end may be broken. No. 24233

three large bulbs with liquid mercury and alcohol are mounted vertically with brass latches against a wooden board and white card. No scale.

one of six telephones. Binatone MP400 DTMF push button telephone, can be wall mounted. 10 memory and redial facility. Early example of mass produced telephone using solid state circuitry; first generation of push button digital phones

Hand held brass microscope, part of a set of miniature optical instruments. Focal length of approx. 1.5" (38mm). Has a clamp so can be mounted to a stand.

Brass stand with 3 feet, possibly for a telescope.