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RESISTANCE COILS, PLASTIC CASE, ACCURATE 500 to 10000Ω (0407)
Non-inductively wound resistance coils of double silk covered constantan wire, mounted in moulded plastic round case. A pair of 4mm socket terminals at the top provide its connection in the circuit. Value clearly marked on each coil. Accuracy ?O.2% rated 1 W.
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RESISTANCE COILS (0408)
A range of resistance units based on a high stability metal film element (PCB). They offer improved accuracy and robustness, and are economical than traditional resistance coils. Accuracy ?1%
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RESISTANCE COILS, TRANSPARENT PLASTIC CASE (0409)
Non-inductively wound with double silk covered constantan coils on plastic shaft enclosed in a transparent plastic tube with a connection terminal at each end. values clearly marked on each coil. Accuracy ?0.2%. Rated 1W.
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RESISTORS, SLIDING CONTACT (RHEOSTAT), OPEN TYPE, SINGLE TUBE (0410)
For use as series resistors or potentiometers. Comprises of eureka wire wound on a porcelain tube, supported at both ends on moulded plastic legs. Open type slide wire type with a variety of resistance and current carrying capacity. Copper-nickel alloy wire is oxidized to provide the desired insulation. Phosphorus bronze contact provided on metal chrome plated slider-rod to give rapid and smooth adjustment. Three 4mm socket terminals are provided - one at each end of the wound resistance wire and third one on one of the supporting legs and connected to the slider arrangement, enabling the use of rheostat as variable resistor or potential divider. Designed for continuous use without overheating. Total resistance in 0 and current carrying capacities are marked on each rheostat. Pipe Diameter 43mm.
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RESISTORS, SLIDING CONTACT (RHEOSTATI, OPEN TYPE, SINGLE TUBE (0411)
With bigger tube diameter. On grooved asbestos pipe with cast metal legs. All ranges available as in Physics 0411
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RESISTORS, SLIDING CONTACT (RHEOSTAT), OPEN TYPE, DOUBLE TUBE (0412)
With slider arrangement sliding between two tubes parallel to each other, diameter of each tube about 43mm. Supported at both ends on legs
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RESISTORS, SLIDING CONTACT (RHEOSTAT), OPEN TYPE, DOUBLE TUBE (0413)
With slider arrangement sliding between two tubes parallel to each other, diameter of each tube about 56mm. Supported at both ends on legs
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RESISTORS, SLIDING CONTACT (RHEOSTATI, OPEN TYPE, VITREOUS ENAMELED TUBE (0414)
Rheostats of excellent quality. Wound with heavily oxidized resistance wire on vitreous enameled steel tube. The winding is locked into place with ceramic cement. The tube is carried upon robust enameled die-cast end supports with heavy duty sliding contact consisting of multi leaf phosphor bronze strips, nickel plated for corrosion resistance. 4mm socket terminals are fitted, allowing for use as a variable resistor or potential divider.
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RESISTORS, SLIDING CONTACT (RHEOSTAT), WITH PERFORATED COVER (0415)
Heavy pattern. sturdy design. protected by perforated cover and designed to provide extra safety to the user. Other important design changes include spring loaded sliding contacts of solid brass in place of phosphor bronze strip contacts. Wound with heavily oxidized resistance wire on an insulated tube. Fitted with three 4mm socket terminals allowing for use as a variable resistor or potentiometer with a single slide operation. Resistance and current rating clearly marked on the slider. Resistance ? 1.0% of the nominal value. Permits continuous use for longer periods without overheating. Pipe diameter available is about 56mm
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WHEATSTONE BRIDGE, FOUR GAPS (0416)
For determination of unknown resistances or comparison of resistances. This substantial FOUR-GAP bridge has broad, heavily plated brass strips mounted on a base. Terminals with 4mm sockets are provided to reduce unwanted resistance to a minimum and the gaps are closed by removable plated brass strips, which are held in position by the terminals. The 24SWG bare constantan wire is stretched along the top of a meter scale graduated in millimeters and figured every centimeter. The ends of the wire are securely clamped to the terminating strips to reduce end errors to the negligible level. Wire easily replaceable if damaged or broken. Supplied WITH JOCKEY.
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WHEATSTONE BRIDGE, TWO GAPS (0417)
Comprising 24SWG bare constantan wire stretched along a meter scale, subdivided in centimeters and millimeters, clamped to stout plated brass terminating plates designed to ensure that the connections are made exactly at the ends of the scale. A heavy plated brass strip with 4mm socket terminals is fastened along the back of the baseboard and provides a TWO-GAP system for normal Wheatstone bridge work. Supplied WITH JOCKEY
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POTENTIOMETER (0418)
Useful as a potential divider for various electrical experiments such as in null point detection, works on the principle of variation of resistance of a conductor with length. Comprising a 24SWG bare constantan wire stretched along a meter rule, sub-divided in centimeters and millimeters and clamped to stout plated brass end plates. The clamping system is designed to make good electrical contact with the wire at the exact ends of the scale thus leaving virtually no margin for 'end errors'. The terminating strips are provided with heavy-duty 4mm socket terminals and the complete assembly is mounted on a long baseboard. Supplied WITH JOCKEY
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PENCIL JOCKEY (0419)
For Wheatstone bridge and potentiometer work, with insulated handle, plated brass contact, and a plated brass terminal with 4mm Socket. Dveralilength about 120mm approx.
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MANGANIN WIRE, BARE (0420)
n alloy of manganese, nickel and copper, having a low temperature coefficient. This wire is particularly suited for resistance coils etc., or any application where accuracy of resistance value is the important factor and electrical loading is low. Double Rayon covered is also available this category.
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EUREKA/CONSTANTAN WIRE, BARE (0421)
A copper nickel alloy of low temperature co-efficient suitable for resistance coils etc. Double Rayon covered is also available in this category.
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