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RESONANCE JAR (0602)
Made of glass, mounted on circular base. Size approx 30x7.5cm [height x diameter).
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RESONANCE APPARATUS, ON STAND (0603)
For determination of wavelength and velocity of sound in air through the study of resonating air columns. Comprises a graduated glass tube, mounted on retort stand with suitable clamp and boss, and is connected to a water reservoir through flexible rubber tubing. Reservoir also mounted on the support rod through retort clamp and allows the adjustment of water level in the glass tube. Complete apparatus mounted on a base.
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GLASS TUBE (0604)
Spare for Resonance Apparatus, about 84cm long and 2.5cm diameter.
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SONOMETER, SIMPLE PATTERN (0605)
For verifying the laws of vibrating strings. Comprising a wooden baseboard about 70x9cm supported on feet at its four corners. One end of the base has two 50N spring balances with hooks and the other end has two corresponding wrest pins for mounting wires and adjusting their tension. Also provided are three bridges one large, to span both wires, and two small, for the individual wires, to control the length of string undergoing vibration. Supplied with two steel wires each of 30SWG x 1m long and one wrest pin key.
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SONOMETER, BOX TYPE, WITH SPRING BALANCE (0606)
Similar to Sonometer Simple but with spring balance attached to each or the two wires for measuring wire tension and with 0-60cm scale mounted along each edge, in place of 1m scale
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SONOMETER, SIMPLE PATTERN, IMPROVED (0607)
Similar to SONOMETER SIMPE PATTERN in basic constructional features and functionality, but has simple thumb screw geared mechanism in place of wrest-pins, that provides more reliable, robust, fail-safe arrangement for adjusting wire tension, and provides for easy changing of wires
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SONOMETER, BOX TYPE (0608)
Comprising a hollow wooden resonance box about 114cm length, 12.5cm width and 10cm height, with two meter graduated in millimeter, mounted on top on either side along the length. One each of brass and steel wires of different diameter attached to fixed bridge on one end of the box and tensioned by wrest pins at the other end. A pulley mounted at the end supports third wire over it with masses suspended to the wire end. Includes two short and two long bridges for adjusting length of vibrating strings, and additional wires one each of steel and brass of 22 SWG, length about 1.5m
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SONOMETER, THREE WIRE PATTERN, GEARED (0609)
A hollow wooden sounding box, about 1160x 120x 115mm (length x width x height) provided with 0-100cm scale at its top, with two wires stretched over fixed bridges, one at each end of the box. One wire passes over a horizontally mounted pulley and has a spring balance for directly reading the tension applied. The second wire is fixed at one end and attached to wrest pin for tension control and provides complete length of vibration. The third wire passes over a vertically pulley and for suspending masses through it for tensioning the wire. The wires supplied are of steel and are carefully selected to possess the exact determined density and radius uniformly throughout the length to avoid the need of repeated measurements. The wire tension mechanism is based on robust and mechanically sound thumb screw & gear system, which is accurate, more reliable and makes changing wires quick and easy. Complete with three moveable bridges, wrest-pin key and a set of four wires, length 1 m, diameters 0.70, 0.40 and 0.40mm. Supplied without masses.
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SONOMETER WIRES SET (0610)
Set of six wires, 3 each of brass and steel of length 1. 5m, and cross-section 22, 24 and 26SWG, with looped ends, ready for use.
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SLOTTED MASSES SET (0611)
For use with sonometers, cast iron, finished in synthetic hammer tone.
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VIBRATION GENERATOR (0612)
Provides Mechanical Oscillations when given input signals from oscillator or AF oscillator. A specially designed coil system enables the unit to be operated at its maximum rating for a prolonged period without any damage due to overheating. The frequency response encompasses the whole of the audio spectrum and beyond. Electrical input via a pair of 4mm shielded sockets and oscillating mechanical output is available through a shaft at the top. A locking arrangement provides safety to the apparatus during storage or transportation by blocking the motion of shaft.
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TUNING FORKS, SET OF 8, STEEL (0613)
Best quality, plain shanks, with frequency clearly marked. Set consisting one each of diatonic scale frequencies (Hz) C1-(256), D-(288), E-(32O), F(341.3), G-(384), A-(426.6), B-(480), C2-(512). Complete set of 8 tuning forks, supplied in a case.
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TUNING FORKS, STEEL (0614)
Plain shanks, best quality, chrome plated / blued steel. Available in frequencies (Hz) C1-(256), D-(288), E-(32O), F(341.3), G-(384), A-(426.6), B-(480), C2-(512).
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TUNING FORKS, SET OF 8, ALUMINIUM (0615)
Made of aluminium, anodized, best quality, set of 8 tuning forks with frequencies same as in TUNING FORKS, SET OF 8, STEEL i.e. frequencies (Hz) C1-(256), D-(288), E-(32O), F(341.3), G-(384), A-(426.6), B-(480), C2-(512).
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TUNING FORK, SET OF 13 (0616)
Best quality plain shanks, with chromatic scale frequencies from C1(256Hz) to C2(512Hz). Complete set of THIRTEEN Tuning Forks supplied in a polished wooden case.
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