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280 - Radar Modulator tube (triode) VT98A England This valve was used in Chain Home Low (CHL) Radar in England which provided up to 20 minutes early warning of approaching enemy aircraft. The RAF could thus conserve fuel by not having planes flying around the clock to spot... |
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292 - Filter Spectrophotometer EEL International Ltd. (Evans Electroselenium Ltd), England A cast - alloy case supports a tungsten lamp, interference filter, sample holder, photo cell, galvanometer and case cover. Light from the source tungsten lamp passes through the interference filter and samples to the photo cell, then the... |
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293 - Flame photometer, EEL 100 EEL (Evans Electroselenium Ltd), |
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294 - Fortin Mercury Barometer Griffin, London 2195 , England A wooden wall plaque supports a brass outer casing which protects the glass barometer tube and wood and leather cistern. A brass screw provides the means to raise or lower the level of mercury in the cistern to a fiducial point in the form of an... |
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297 - Discharge Tube, Hydrogen OSRAM, A capillary tube connects two larger tubes with electrodes. On has a large bulb. The system contains Hydrogen. |
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298 - Discharge Tube, hydrogen OSRAM, England A capillary connects two tubes with electrodes. One has a large reservoir bulb attached |
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Mullard, |
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E.A., |
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Eimac, |
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308 - Power diode valve X-ray tube Coolidge, |
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Western Electric, |
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311 - Resistance, Carbon Stack Cambridge Instrument Co. , England The unit comprises a stack of carbon discs under pressure. As the top thumbscrew is tightened, the resistance of the stack decreases. The stack is used to control the current in a circuit eg the field winding of an electric generator. |
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Hewlett-Packard , Usa This is a scientific pocket calculator, with red LED readout. It uses Reverse Polish Notation (RPN) for calculating. |
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Hewlett-Packard, Usa This is an early portable electronic progammable scientific calculator, with red LED readouts. |
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Bleeck Radio Batteries Ltd / Brisbane Queensland / Patent No. 21917, Australia (1925) Marked W.A.Bleeck (Inventor) Managing Director, Bleeck House, Burnett In, Brisbane. Black rubber "deluxe model"; two cells; graphite/Zn electrodes, separated by porous earthenware pot. Designed to give reliable power source for radios and... |
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A mockup of an early Marconi experimental transmitter put together out of Physics Museum collection items in celebration of Marconi's work. |
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320 - Kelvin Vertical Electrostatic Voltmeter Kelvin, Bottomley and Baird, Glasgow and London, No. 21109, Scotland Housed in rectangular brass case painted black, with glass front, rigidly fixed to wooden base with 3 levelling screws. Aluminium pointer includes 3 weights - 28, 84, 333 mg. Comes with mahogany carry case with brass fittings. "Manufacturer's... |
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345 - Wheatstone Bridge resistance Box Otto Wolff, Berlin No.5455, Germany The top is in thick ebonite and the brass blocks are lozenge-shaped and undercut. Provided with resistance coils of thick wire for preventing heating when using strong currents. Twin semi-cylindrical contact surfaces are connected by insertion of a... |
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Two Glass square-section vessels with a circular openings on top. Base of vessels 9.5*9.5, height 16, total height 20. F2/4 embossed in base of one. Ceramic pots 7cm diameters. Invented by French scientist Georges Leclanche (1839-1882) in 1866,... |
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A.E.Dean, London, No. 93371, England The ammeter was made by A.E.Dean of London and is estimated to be used in the early part of this century for medical purposes. The ammeter is enclosed by a 15cm diameter case of brass which is approximately 7cm in depth and has a glass face. The... |
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359 - Ford Ignition Induction Coil Usa (circa 1920?) The coil is concealed by a wooden housing. An interrupter mechanism is situated at one end with a disc connecting to either a contact on a brass plate or the core of the coil. The core is made of a bundle of iron wires. The induction coil is a... |
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The Australian General Electric Company / Sydney & Melbourne / Type G.C / No. 77080 /, Australia Black enamel cast iron wall mount moving iron ammeter, 30 amp full scale. In the cut-away diagram below we can see the two iron pieces, one fixed to the body of the ammeter and the other to the needle spindle. The current that passes through the... |
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368 - Standard variable Inductor Type AA M.W. Sulllivan Ltd,London. No. 42, England (circa 1910) Apparatus consists of two coils of wire, one fixed, one rotatable, mounted in series with a common vertical axis. The coils are mounted in a mahogany box, with an ebonite half circle gauge, graduated from 0 to 180 degrees to indicate the position of... |
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370 - Campbell Adjustable Mutual Inductance Robert W. Paul, London, N,, England (circa 1910) This Adjustable Campbell Mutual Inductometer is splendidly housed in a solid mahogany box with a one-piece timber lid. The top contains seven brass terminals, two rotary range switches and a semi-circular scale. "Total 10 000 microhenries" is... |
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315 - Radio, 8-transistor, 2-band Matsushita Electric Industrial Co. Ltd. , |
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317 - Oscilloscope, Astor, Model TV-1 Electronic Industries Imports Pty Ltd, |
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318 - Oscilloscope, Philips, GM 5655 Philips, |
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321 - Celestial Globe, 18 inch W & A K Johnston Limited, Edinburgh and London, England Stand and meridian ring made of brass, wooden horizon ring and paper scale. Representation of stars and constellations as they would appear on a sphere (Celestial sphere) of infinite radius with the Earth at the centre. Given a particular time and... |
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England Black japanned Aluminium case with rubber rimmed eyepiece at back and open slot at front where a black drum houses the clockwork automatic averaging attachment. The left half of the sextant carries the bubble and its collimating system, which... |
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324 - Horizontal Seismometer, model 8700C Teledyne Industries, Texas, USA. Geotech division, Garland , s.n. 190 , Usa (circa 1960) A seismometer is a device that transforms the seismic energy of the earth into an electrical signal. This particular version measures the amount of translational motion the earth has undergone. Generally, for an overall picture of each movement one... |
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Geotech/A Teledyne Company/Garland, Texas/Model 5240B/Serial 1463/Assembly 90-0524-20, Usa (circa 1970) Part of a seismograph station which was assembled by the Lamont-Doherty Geological Observatory of Columbia University in 1972 for use in the Geology Department of The University of Queensland. The phototube amplifier consists of a Kinemetrics Model... |
| Discharge Tube with Focus Cathode, Anode and Anticathode. | |
| Discharge Tube, with Cathode, Anode and Anticathode, the latter two being connected by a coiled wire. | |
| Discharge tube, with focus cathode, angled anode and auxiliary discharge electrode to adjust pressure. 35mm diameter collimating sidearm with different glass at end. | |
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Machlett, |
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333 - X-ray tube, rotating anode Coolidge/G.E. , Usa |
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Apps, 433 Strand, London, England |
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337 - Sightalight Meter Model 703 Weston Elect. Inst. Corp. , |
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338 - Coincidence Optical Rangefinder (Entfernungsmesser 14 nr 500S) Carl Zeiss, Jena, Germany Metal cylinder of about 10 cm in diameter stands on a tripod. Objective lens with rotating cover at each end and eyepiece at centre. Thumbwheel adjustment at right side. This instrument was used to determine the distance to an object with the use of... |
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339 - Balance, Direct Reading, Type H10T Mettler, Zurich, Switzerland The unit is housed in a die cast metal case, with sliding side windows providing access to the measuring pan suspended from above. Above and behind this chamber is housed the balance mechanism. The digital readout and dials used to operate the... |
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341 - Optical Pyrometer Model No. 8622 Leeds and Northrup Co. /Philadelphia USA/ Serial No.724733 , Usa Grey metallic control box containing galvanometer, standard cell, four dry cells, resistors, two slidewires and knobs; connected to a scope by black cable; scope consists of lenses, switch, filament, lamp and a means for focusing. Current from the... |
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Cahn Division, Ventrol Instruments Corporation No. 24789 , Usa (circa 1965) |
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Oertling, |
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RABONE & SONS MAKERS BIRMm, England Brass, marked at one inch intervals, and at 1 ft and 2 ft. First inch divided into eighths. Stamped shield with lion and NSW at one end, another larger one at other end together with GR/V/SM/16. ER/II/IS between 20 and 21 inches. On reverse, 111... |
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Max Kohl AG, Chemnitz, Germany Pressure cylinder as used by max Kohl for Oersted's piezometer. |
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349 - Altimeter, Aneroid, Model FA 181 Wallace and Tiernan, Belleville, NJ, USA. s/n GG06822, Usa (circa 1940) Housed in a cylindrical metal case painted green, with hinged lid, and shoulder strap affixed on opposite sides of the base. The base contains the altimeter, which is simply an aneroid barometer. This is sealed behind a glass face to prevent... |
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Bellingham and Stanley Ltd., London/No. 529502, England An iron tripod stand supporting two arms, holding a collimator and telescope, and a turntable marked with a 360o scale. The collimator consists of a lens toward the turntable and at the outer end a slit whose size is regulated by means of a screw.... |
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Ellisco, Usa 1940's Mercury Sphygmomanometer in black lacquered case. A black rubber bulb is attached via approx 50cm black rubber tubing to a 12.5cm inflatable cuff, which is attached by approx 80cm tubing to a chrome-plated U-tube manometer with a scale from 0... |
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353 - Sighting Compass Type 06 unknown, UK, s/n 18774D, England Hollow wooden handle with screw on bottom supporting brass bowl. Glass face. Moveable prism with marker for sighting . Mother of pearl magnetic disc mounted on type of universal joint immersed in discoloured liquid in center of bowl. Disc marked... |
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354 - Tuning Fork Stroboscope(s) Ragg, Sheffield, England , England The stroboscope is essentially a more complicated variation of the tuning fork. At the top of the instrument, there are two steel plates (or diaphrams); each with a slit at the centre and overlapping, which are clamped at the end of the two prongs,... |
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G. Gaiffe, Paris, France This induction coil was used to stimulate muscle tissue, in the belief that it improved health and strength. The unit was powered by an electric battery. The flow of electricity in the primary winding of the coil was interrupted by a mechanical... |
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Leeds & Northrup Company/ Philadelphia USA /, Usa Instrument consists of three main parts: the illuminometer proper, a controller, and a reference standard. All are stored in a black case, dimensions of which are 42x25x18 cm. Also included in the case are various accessories, including three... |
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363 - Display of typical valves in use 1920 - 1940 Various, These radio receiving and transmitting valves were made between 1920 and 1940. The Crystal diode was probably 1920s. |
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Aristo-Werke. Dennert and Pape KG, |
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W. G. Pye & Co. Cambridge , England The box contains 4 resistors 3, 3, 3, 1 Ohms. There are four terminals and three shorting plugs to create various resultant resistances. |
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Robt. W. Paul London N. , England |
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436 - Thermal mV meter, patt. Y Cambridge & Paul Instrument Co. Ltd, England , England |
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437 - Air Condenser, Laboratory Standard H. W. Sullivan Ltd, London, England Condenser with semi-circular metal plates rotated by shaft in to and out of fixed stator plates. Capacity is proportional to the angle of the rotor shaft. The worm screw allows fine variation of capacity. The capacity is read off on a semi... |
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365 - Portable Airflow Testing Set Airflow Developments Ltd England. No. 4586 , England Portable airflow kit, includes manometer (small air flow anemometer), pitot tube, thermometer, adjustable metal ruler scale for varying inclinations of pressure tube,, adjustable leveling screws, g-clamp hole in back of case though g-clamp is... |
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367 - Visible Absorption Spectrophotometer SP600 Series 2 Unicam Instruments Ltd, S.V. No. 408-S-10. No. 49985, England The spectrometer is housed in a metal case finished with a blue enamel paint (measuring roughly 40 x 50 cm at the base and around 20 cm high). A standard white incandescent bulb serves as a light source which may be passed through a few coloured... |
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J. Bruce & Sons, Liverpool, England |
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Bleeck Radio Batteries Ltd, Brisbane, Australia Missing porous pot |
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372 - Radiation monitor Type N596 EKCO Electronics Ltd, England |
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