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Die-cast zinc-clad switchfuse "Radette" model, sin

Electricity Supply

1950-1970

Hartmann and Braun voltmeter no.10222 scaled 0-650V

Electricity Supply

1890

Micromanipulator, 1950-1956

Microscopes

1950-1959 (estimated)

Shunt 150amps, no 8284

Electricity Supply

Ultraviolet spectroscope marked 'R & J . BECK . LT

Optics

1918-1960

Regloscope type W930A serial no. 358 by British Wa

Time Measurement

1970-1989 (estimated)

1500 amp shunt for ammeter no.7405

Electricity Supply

SEI Exposure Photometer, made in England, in leath

Optics

1960-1969

Image splitting eyepiece by Vickers, in wooden cas

Microscopes

1960-1969

Large Thyratron type 4079 GA Airblast cooled triod

Electricity Supply

Set of 5 metal balls with stand and cake of wax to

Heat

1880

Ironclad switchfuse by Bill Switchgear, single pol

Electricity Supply

1920-1950

Ironclad switchfuse "Invicta" model, by Bill Swit

Electricity Supply

1950-1970

Timeswitch to control a meter which charged daytim

Electricity Supply

1903

Nalder Bros. & Thompson Ltd. "Ohmer" insulation te

Electricity Supply

Spark chamber section, a particle detector used with Nimrod, 1964-1978

Nuclear Physics

1964-1978

Germanium diode type GP5C, mounted on an aluminium

Electricity Supply

1953

one shunt for ammeter no.7405 c.1898, not marked w

Electricity Supply

Moving iron ammeter, 100 amps, for d.c. measurements

Electricity Supply

1927

'Pathological set' of twelve objective lenses

Optics

c. 1920-1939

'Battery Manager Ultra', a battery charger designed for recharging alkaline (primary) batteries but also for zinc chloride (primary) batteries and Nickel-Cadmium, Alkaline and Nickel Metal Hydride rechargeable types, with plug-in power unit, in original packaging marked Innovations International Ltd., Richmond, Surrey, supplied by Maplin Electronics Ltd, date 1999-2000.

'Battery Manager Ultra', a battery charger designe

Electricity and Magnetism

1999-2000

Nikon Microflex Model AFM automatic microphotographic attachment for a microscope, comprising M-35S dark box (camera body) serial no. 88697 for 35mm film; Lieca type mount, 35mm projection lens, shutter unit, ocular viewfinder and standard eyepiece adapter all assembled into one unit; in a fitted leatherette case; plus electronic control box and connecting cable.

Nikon AFM microscope camera, c.1975

Microscopes

1970-1979

Wind MIDI (musical instrument digital interface) controller, type WX5, made by Yamaha Corporation, Electronic Musical Instrument Division, 1999, complete with soft case, power supply, strap, instruction manual, and output connector.

Electronic clarinet

Acoustics

1999

Autobalance precision bridge type B331 Mk II, serial no. 125P, for measuring capacitance and conductance to 0.01%, working frequency 1 kHz, made by Wayne Kerr between about 1966 and 1979.

Autobalance precision bridge type B331 Mk II, seri

Electricity and Magnetism

1966-1979

Scientific stereoscope for use on desk or bench top by Carl Zeiss Jena, Nr. 5284, and 14 (plus one duplicate) out of a set of 20 stereographs, post-1908

Scientific stereoscope for use on desk or bench to

Optics

1908-1914 (estimated)

Objective mirror assembly for a reflecting microscope comprising large aspheric aluminised speculum metal primary mirror made by I. H. Ford on C. R. Burch's mirror figuring machine at Bristol (Inv. No. 1986-113), plus a small aluminised spherical mirror, made from part of a ball bearing, in a kinematically designed mount allowing backlash-free adjustment of the primary mirror in the x and y directions and the secondary mirror in the z direction, made between about 1954 and 1964. Also an engineering drawing of the assembly.

Objective mirror assembly for a reflecting microsc

Microscopes

1954-1964

4 MeV electron linear accelerator built by D.W. Fry et al, c. 1948. Ancillary - equipment: IONISATION GAUGE CONTROL UNIT model 3. Made in England by Edwards High Vacuum Ltd., Crawley, Sussex.

4 MeV electron linear accelerator built by D.W. Fr

Nuclear Physics

1947

Counter for low-level alpha radiation used at the British Museum Department of Scientific Research for measuring the radiation level of surrounding soil when calculating thermoluminescence dates of samples, estimated date 1970-1979, comprising counter unit probably by the Littlemore Scientific Engineering Co., plus a Brandenberg model 2475R photomultiplier power supply mounted in one housing, and a photomultiplier tube unit.

Counter for low-level alpha radiation used at the

X-rays

1970-1979 (estimated)

Automatic precision resistance A.C. double bridge type A6 with six decade swiches, made by Automatic Systems Laboratories [ASL], Leighton Buzzard, Beds., c.1980.

Automatic precision resistance A.C. double bridge

Electricity and Magnetism

1980-1984

Baltospot 140 x-ray machine by Balteau, Liège, Belgium, c.1964, comprising head unit, base and pillar, and control and timer unit, plus associated items (interconnecting boxes and wiring (incomplete), two illuminated warning signs, and purpose-built rotatable support for base an pillar)

Baltospot 140 x-ray machine by Balteau

X-rays

1959-1969

Mef Universal Camera Microscope made in Vienna by Reichert with two boxes of accessories, probable date 1960-1969.

Mef Universal Camera Microscope made in Vienna

Microscopes

1960-1969

Digital voltmeter type LM 1010.2 serial no. 84261, by Solartron Laboratory Instruments Ltd., Chessington, England, uncased for rack mounting, 5-digit readout, five ranges, 0.15V to 1500V and check range, estimated date 1961-1975

Digital voltmeter type LM 1010.2 serial no. 84261,

Electricity Supply

1961-1975 (estimated)

Control unit for a Mark 1 scanning tunneling microscope by WA Technology, such as Inv. No. 1989-576, with preamplifier and monitor boxes and various cables, dating from 1985 to 1994.

Control unit for a Mark 1 scanning tunneling micro

Microscopes

1985-1994

Rado DiaStar 'Ceramica' quartz electronic wristwatch type no. 21348172, serial no. 2893578, case and bracelet in black scratch-proof ceramic, sapphire crystal, water resistant to 30 metres, in presentation case

Rado DiaStar 'Ceramica' quartz electronic wristwat

Time Measurement

1998

Wheatstone Rheostat bearing label stating it to be "No. 1 original rheostat(1843)"

Wheatstone No. 1 original rheostat, 1843

Electricity and Magnetism

1843

Metallux metallographic (i.e. metallurgical) microscope by Leitz, Wetzlar, Germany, for use with top illumination of opaque specimens only, c. 1956, fitted with lamp housing for filament lamp, mechanical stage, quintuple revolving nosepiece with five Leitz objective lenses (5/0.9, 10/0.18, 20/0.35, 50/0.85 & 100/0/95), and binocular tube with Ernst Leitz Periplan 10X eyepieces for spectacle wearers; plus 6 V 5 A rated (6 A max.) transformer and fitted wooden case containing Normkam 6.5 cm by 9 cm camera attachment with focussing screen, viewing hood and cable release; two (ordinary) Periplan 10X eyepieces, four 78 mm square metal object slides, two ground glass, two blue glass and two green glass filters to fit the lamp housings (many accessories missing from the case)

Metallux metallographic (i.e. metallurgical) micro

Microscopes

c. 1956

Fifteen metal samples (ten elements, three alloys) each in a pill box all contained in a fitted mahogany case, for flame tests for spectroscopic examination.

Fifteen metal samples (ten elements, three alloys)

Optics

1875-1924 (estimated)

'Pathological set' of twelve objective lenses and brass control knob, each lens with a known defect, in fitted box, with separate telescope, all by Cooke, Troughton & Simms Ltd, for demonstrating the effects of imperfect lenses, probably c. 1920-1939. Also three home-made 'artificial stars' consisting of ball bearings mounted on rods on a wooden base. (One lens cracked.)

objective lenses and control knob

Optics

c. 1920-1939

two 1500 amp shunts for ammeter no.7405 c.1898

Electricity Supply

Precision ratio comparison bridge type VLF51A, by Rosemount Engineering Company Limited, Bognor Regis, Sussex, England, c.1980, with terminal unit model CSU A1.

Precision ratio comparison bridge type VLF51A, by

Electricity and Magnetism

1976-1985

'Elite' epidiascope with transformer unit and with lenses and carriers for lantern slides and 35mm slides, 1950-59.

'Elite' epidiascope with transformer unit and with

Optics

1950-1959

Swatch Skin Watch quartz electronic wristwatch

Time Measurement

1998

Environmental chamber by Laboratory Thermal Equipment Ltd., Greenfield, near Oldham, Manchester, England, serial no. 33585 (a thermally insulated, humidity conditioned chamber with trays for samples, glazed inner door and heavy outer door), mounted on a metal frame base, with a 'Xactline' two-channel temperature recorder for Pt/PtRh thermocouples type 7052/1 serial no 2179FB by Pye Ether Ltd., Stevenage, Hertfordshire, England, on top (possibly modified), 1971-1980.

Environmental chamber by Laboratory Thermal Equipm

X-rays

1971-1980

Pin, metal, Chinese

Pin

Asian Medicine

Mains-driven synchronous electric clock in bakelite case, not self-starting, made in England by the General Electric Co. Ltd., trade marked 'SEC Electric', 200/250 volts 50 Hz, English patent 2634/31, estimated date 1931-1939

Mains-driven synchronous electric clock in bakelit

Time Measurement

1931-1939

Sampling oscilloscope model 185A serial no. 120-00774 by Hewlett Packard, Palo Alto, California, with two captive probes, c. 1960, with two input channels each 10 - 200 mV/cm and timebase 10 - 100 millimicroseconds/cm plus X1 and X10 magnifier.

Sampling oscilloscope model 185A serial no. 120-00

Electricity and Magnetism

1955-1964 (estimated)

Vickers M55 microscope Serial No. M550241 Regd. No. 900267 Patent Nos. 936184, 904280 & 911827, by Vickers Instruments Ltd, intended primarily for incident light use with metallurgical specimens using either an eyepiece or zoom projection on to an integral screen, with integral xenon lamp illuminator unit, mounted on special desk incorporating the power supply unit, with accessories in desk drawers.

Vickers M55 microscope Serial No. M550241 Regd. No

Microscopes

1965-1974

Wristwatch with quartz crystal controlled movement and digital light emitting diode display, serial no. 95077, made by Solidev Ltd., New York, USA, unused, in original case and box, c.1971

Solidev quartz-controlled wristwatch with LED display, c. 1971

Time Measurement

c. 1971

Digital voltmeter type LM 902-2 serial no. 65286 by Solartron Laboratory Instruments Ltd., Surrey, England, 4-digit readout, five range, 0.1V to 1000V at 0.1% accuracy plus two ranges, 100V and 1000V at 0.5% accuracy, plus check setting (against internal standard cell), estimated date 1961-1975

Digital voltmeter type LM 902-2 serial no. 65286 b

Electricity Supply

1961-1975 (estimated)