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2223 - Fusion Splicer for Optical Fibre Northern Telecom, Canada, Canada (c. 1997) Used to permanently join optical fibres by fusing them together while maintaining accurate alignment. |
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unknown, probably a lens from a lantern slide projector |
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W.G. Pye & Co Ltd, ENGLAND, England (1948) Telemicroscope focusses about 100 mm from objective, forming an inverted image with a field of view about 10 mm across. A graticule reading 0-100 is visible through the Ramsden eyepiece. A group of eight of these was purchased in 1948 for £ 7/... |
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2226 - Microscope with 25 mm Square Graticule unknown, The Equipment Register shows it as '2978 Standing microscope with stand, H.B. Selby' |
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Pathe Freres, France Twin bi-convex lens assembly in plated brass tube. 75 mm focal length. |
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Pathe Freres, Paris, France Twin bi-convex lens assembly in plated brass tube. |
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J.H. Dallmeyer, LONDON, England Two lenses in a plated brass tube |
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2230 - Projector Lens 2 1/2 Inch M.F.H., France Two lens assembly in plated brass tube |
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2231 - Spectrometer Slit Assembly unknown, An adjustable slit probably originally part of a spectrometer. |
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unknown, |
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Hilger, England (1948) Multiple reflections between carefully aligned partial reflectors result in narrow wavelength pass-bands when the mirror separation is an integer multiple of half-wavelengths. In this version of the Fabry Perot interferometer, called an 'etalon',... |
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2234 - Spectrometer Slit Assembly unknown, A simple slit assembly from an inexpensive student spectrometer. |
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2235 - Telescope Tube and Eyepiece unknown, A telescope with rack focussing and two mounting points. Missing its objective. Probably originally part of a spectrometer. |
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2236 - Projector Lens 25 inch FL M.F.H., France A lantern slide projector lens of 25 inch focal length, with two lenses at the ends of a plated brass tube. |
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2241 - Microscope Objective Lens (16 mm) R & J Beck Ltd, England A microscope objective lens from a well-known maker. |
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unknown, Tinplate cylindrical body with soldered seams. Screw-in stopper, brass tubular spout. Airhole in stopper to allow smooth flow and perhpas control. Possible used for topping up a spirit burner or boiler. |
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C.I., Japan (circa 1950 (?)) Child's toy kaleidoscope. cardboard tube with three mirrored glass strips set at 600 to each other. When viewed from the end, multiple reflections produce a multicoloured symmetric pattern. Three short cylinders are supplied that fit over the end... |
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2238 - Diffraction Grating 15,000 lpi unknown, A small glass plate carrying a one-inch square replica diffraction grating. |
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Kleinschmidt, A tuning fork with vanes at the ends of the tynes that form a slit that opens and closes at the nominated frequency. Looking at a vibrating or rotating object through the slit gives a stroboscopic view that makes the object appear stationary when... |
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unknown, Box containing microscope parts 1) eyepieces X5, X10, X12.5 2) objective marked 100/1.25 160/0.17 3) slides 4) substage mirror, one side planar 5) lamps (2) 220V, 15W, 2-pin bayonet 6) silica gel dessicant |
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2244 - Goldring Needle Checker Goldring, Japan Small microscope (X40) used to check the condition of the sapphire or diamond stylus on the pickup of a player for vinyl records. |
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2245 - Morse key type "F" (Bathtub) ECLIPSE RADIO Pty Ltd MELBOURNE AUSTRALIA, Australia (World War 2) Morse code key with a moulded bakelite body shaped like a bathtub. Used on aircraft inWW2. |
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W.G. Pye & Co. Ltd, England Four heavy brass blocks with terminals, at corners of a bakelite base. Plugs allow adjacent blocks to be connected. no diagonal connections are available. |
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unknown, Two DPDT blade switches on a bakelite base with 12 connection terminals. |
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2249 - Young's Modulus Apparatus unknown, This jig is used to determine the Young's modulus of a wire by the method of G.F.C. Searle described in Worsnop and Flint, 'Advanced Practical Physics for Students'. The stretching of a wire sample hanging from the ceiling under increasing load is... |
|
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2249 - Young's Modulus Apparatus unknown, Used to determine the Young's Modulus of elasticity of a wire by the method of G.F.C. Searle described in Worsnop and Flint, Advanced Practical Physics for Students', p85, whereby the stretching of a wire hanging from the ceiling under increasing... |
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Paulin Instruments, Sweden Aneroid barometer where the measurement is made by manually adjusting the force of a spring to balance the force of the atmosphere on a bellows. This avoids any problems with friction. The black knob is turned until the needle in the little window... |
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EMI, England This photomultiplier tube has a large end window. A scintillation crystal is placed on this window, and the photmultiplier detects the flashes of light when atomic particles pass through the crystal. These flashes convert to electrons, which are... |
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Radiotron, Australia High Voltage diode, low current. Devised in a hurry WWII using parts of another type valve (possibly 6SN7). |
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2251 - Electric Solenoid Counter Sodeco, Switzerland This 4 digit counter reads from zero to 9999. It is stepped by a 110 Volt solenoid at a maximum rate of ten counts per second. The counter can be reset by the toggle on the front of the counter. |
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2250 - Box of Mercury Switches Unk, Mercury in glass switch. Single pole. Tilt to make contact. |
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2252 - Weston Reference Cell Type F Muirhead, England This is a Weston Standard Cell, Voltage 1.01921 Volts. |
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2253 - Weston Standard Cell Type 5-550-A Muirhead, England This is a Weston Standard Cell, Voltage 1.01859 Volts at date of manufacture. |
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2254 - Aneroid Barometer Parts Unknown, |
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G H Zeal, England Mercury in glass, 1C divisions. |
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G H Z eal, England Mercury-in-glass, borosilicate glass. |
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2257 - Enclosed Hg Thermometer -10C to 110C, 1C Unk, Mercury in glass thermometer, enclosed in a metal jacket. |
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2258 - Full Immersion Mercury Thermometer 0C to 110C, .01C Townson & Mercer (distributors), Japan Mercury in glass thermometer. |
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2259 - Mercury Thermometer 50C - 100C, .01C Unknown, Mercury in glass Thermometer |
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2260 - Alcohol Thermometer -200C to 30C, 0.1C Zeal, England Alcohol in glass thermometer. |
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2261 - Mercury Thermometer 0C to 360C, 0.2C G H Zeal, England Mercury in glass thermometer. |
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2262 - Mercury Thermometer 0C to 360C, 2C Apex, Japan Mercury in glass thermometer. |
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R Field & Son, Birmingham, England (after 1855) Single lens microscopes were widely used in the nineteenth century, especially in the field, even by scientists of the caliber of Robert Brown and Charles Darwin. A brass column supports a lens, a moveable support for a specimen on a spike or on a... |
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Steven Painter, Australia A sine bar is used in engineering metrology in the accurate measurement and laying out of angles. The bar has precision ground cylinders at each end and a precision straight section parallel to the line between their centres. It can serve as the... |
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2313 - Thermal Circuit Breaker Belling & Lee Ltd, |
|
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2263 - Setpoint Mercury Thermometer 0C to 100C, 1C B Braun, Germany |
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2264 - Setpoint Mercury Thermometer 0C to 100C, 1C Frowi, Germany |
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2265 - Setpoint Mercury Thermometer 0C to 50C, 0.5C JUMO-MS, Germany |
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2266 - Wall Thermometer 0C to 110C, 1C Normalglas?, Standard wall thermometer, mounted on timber. |
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2267 - Valve Computer Module, Double Triode IBM?, Special Quality double triode E92CC and components mounted in a plug-in frame. Function unknown. |
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2268 - Valve Computer Module, Power Pentode IBM?, Special Quality power pentode valve 6AQ5 and components mounted on plug-in frame. Function unknown. |
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2269 - Valve Computer Module, Thyratron IBM?, Special quality thyratron valve 2727 and components, mounted on plug-in frame. Function unknown. |
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2270 - Valve Computer Module, Pentode IBM?, Special Quality pentode valve E91H and components, mounted on a plug-in frame. Function unknown. |
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2271 - Valve Computer Module, Double Triode IBM?, Special Quality valve E92CC and components, mounted on a plug-in frame. Function unknown. |
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2272 - Valve Computer Module, Double Triode IBM?, Special quality double triode E92CC and components, mounted on plug-in frame. Function unknown. |
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2273 - Resistor Precision High R Welwyn, England This precision resistor has been spirally cut to two percent tolerance. |
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IRC Australia, Australia 200kOhms helically cut resistor. |
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2275 - Small Incandescent Bulb 12 Volt GEC, England Bulb 12 Volt 2.2 Watts, Edison Screw base, Tungsten filament. |
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2276 - Small Instrument Lamp and Base Eveready, China This bulb has a lens in the top to focus the light on small objects such as the interior of the eye. It operates on 1.2 Volts and has a small Edison Screw base. |
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GE, Two parallel rods are sealed in glass, filled with Neon. A discharge occurs between the rods. |
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2278 - Ferrite Balun Transformer Core Unknown, The piece of Ferrite has two parallel holes. Insulated wire is looped through these holes around the central pillar. This was used in Black and White TV receiver tuners, to convert a balanced 300 Ohm twin line to an unbalanced 75 Ohm Coaxial cable.... |
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Weston Electrical Instruments Corp., Usa This unit contains a heating element and thermo junction for a thermo ammeter. The current rating of the unit is 20 Amps. Thermo ammeters were commonly used as they had a wide frequency range of use, from DC to radio frequencies. They have a slow... |
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Westinghouse, Usa This is a small Selenium full-wave rectifier 5 mA rating, mounted on paxolin, on wooden standoffs and four brass terminals. It was used with a DC d'Arsonval meter in lab experiments. |
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2281 - Thermal Time Delay Relay Unknown, Harp element of thin wire between two ceramic spools, is heated by an external power supply. The wires stretch gradually and allow an attached contact to complete a second circuit after a set time delay. |
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Vickers, England This unit has a stack of steel plates with a thin layer of Selenium. Used as a half-wave rectifier. |
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Unknown, This unit is a full-wave rectifier. It consists of copper discs witha thin layer of cuprous Oxide. Each disc thus forms a Schottky junction. This an example of the earliest type of solid-state rectifier. |
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2284 - Germanium Transistor OC36 Mullard, This is a PNP Junction Germanium power transistor in a T03 metal package. It is an example of the first solid-state power transistors, operating at low voltages and high current. It was advisable not to operate the unit above about 90C case... |
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2285 - Germanium Transistor ASZ17 Mullard, Holland PNP Germanium power transistor in TO3 metal case. This is an example of early solid-state power amplifier devices. This device was easy to destroy if the case temperature was allowed to rise above about 90C. |
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2286 - Vehicle Alternator Diode Philips, This is a PN Silicon half-wave power rectifier. It was designed to be pressed into a heatsink, with the case splines ensuring a good contact. Six of these diodes are used in a three-phase vehicle alternator to produce DC to charge the vehicle... |
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2287 - Germanium Stud Diode GU1A100SB Unknown, This is an example of a large stud diode using Germanium. It has a maximum forward voltage drop of 0.5 Volt. Silicon diodes replaced Germanium as they could operate at a higher temperature. |
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Unknown, This diode has a Copper case, with a three-hole base mount. The composition of the junction pellet is unknown. |
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2289 - HV Selenium Rectifier Stack IT&T, Usa The glass tube contains approximately 150 discs with plated brass end-caps, designed to be mounted in a tool clip holder. It is a half-wave rectifier, of unknown voltage rating, but low current, with positive polarity marked with red paint at one... |
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Aerovox, This item is in two parts. First there is the capacitor consisting of flat metal leaves with interlarded solid dielectric (most likely Mica), clamped together in a metal shroud. The value is likely less than 100 picoFarad, the usual being 100... |
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Unknown, A rod (most likely carbon composition) is sealed in a glass tube, with plated metal ends and solid wire leads for soldering into circuit. |
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Unknown, This item is a flat-wound resistor wound on paxolin board with a metal contact slider. The item may be used as either a potentiometer or rheostat. |
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