Browse Items (3473 total)

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.

black metal with rectangular base curving round at top. 2 lenses visible.

A large metal optical bench with maker embossed in large letters on the metal. Groove style.

Arnold's compensated escapement - demonstration of his patent No. 1328. A brass escapement on a wooden base

In glass case with black painted wood. Perfect order. Case key in bottom. Another key with square hole and ivory disc handle unlikely to belong with this item.

min/max thermometer, U shaped glass tube with limit pins set above the mercury. Plastic case. A red plastic magnet holder is hung on the bottom for use in setting the limit pins; possibly modern for maintaining air control

ser No. 20779. A mercury 60mm immersion thermometer housed in a cardboard tube

Inlaid body on 3 small round brass feet (front one missing). 19 plates C1 to G3 (highest). Sounds good. Circular brass disc ' Univ. Abdn. Nat. Phil. '

2 terminals on a wooden base with a Morse code like tapper coming out of one.

a metal pedestal on a circular base with three mounting holes. The pedestal has a clamped attachment with an adjustable horizontal arm moved by a knurled thumbwheel. Specialised laboratory equipment