Physics Instruments

High grade laminations are used to avoid losses. The box is made from a thick metallic sheet. An anchor make piano type switch is provided for on/off operation and a 1.6 m, 3 core flying lead is provided for main connection and output is via a special anchor make 3 pin socket is provided to avoid shock due to the leakage of the current. This transformer is an auto leak type, giving a startin voltage 440 V which automatically reduces when the lamp has struck.

Cat. No.	Type
1)	35 W
2)	55 W

The bos is rectangular in shape and provided with slits on four sides equally spaced to enable four experiments to be performed simultaneously using one light source. Each slit is provided with a cover so that it can be closed when not required. Bulb holders of finest quality are fitted inwooden box with special cord.

Cat. No.	Type
1)	Wooden box for 35 W S.V lamp
2)	Wooden box for 55 W S.V lamp

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These items are used to determine the frequency of A.C. mains by sonometer method. This apparatus consists of a suitable electromagnet with step down transformer of fixed voltage 6 V & 8 V and has a current capacity 2 A. When this attachment is supported over a sonometer and connected to a source of alternating current, The wire vibrates continuously. By adjusting the tension and the bridge position maximum resonance can be obtained. Supplied without sonometer and without stand for holding the electromagnet.

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Manufactured from 50 mm diameter iron rod & this type of slotted weight is very much accurate than the above type. Cap. 500 x 5 m. Powder coated.

For use with above types of sonometer cat no. 1238, manufactured from 50 mm diameter Iron rod & this type of slotted weight is very much accurate than above cat no. 1238 B cap. 500 x 5 gm. Powder coated.

For use with above type of sonometer, capacity 500 x 5 m, iron, black painted.

For use with above types of sonometer, cat no. 1238 – 1238 A capacity 500 x 5 gm., iron, black painted

Other specifications are same as above, only brass parts are replaced with aluminum parts.

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Other specifications ate same as that of Cat. No. 1238, only brass parts are replaced with aluminum parts.

Comprising a teak wood with meter scales one meter long subdivided in millimeters. One each brass and steel wires of S.W.G. 26 and 24 respectively, attached to a fixed bridge and tensioned by fine adjustment pegs : two moveable bridges, pulley and fixed screw to enable a third wire to be fixed for tensioning by weights. Wooden resonance box is made from superior quality teak wood and all metal parts are of brass alloy.

Comprising a wood resonance box 1140 x 100 x 85mm ( length x width x height ) with meter scales one meter long sub divided in millimeter. One each brass and steel wires of S.W.G 26 and 24 respectively, attached to a fixed bridge and tensioned by fine adjustment pegs: two moveable bridges, pulley and fixed screw to enable a third wire to be fixed for tensioning by weights Wooden resonance box is made from, superior quality wood and all metal parts are of brass alloy

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Extra large size with a circular aluminum disc of about 12 cm diameter divided into 100 equal parts. Vertical scale is of brass with reading 40-0-40 mm.

It comprises of a circular metal table 50 mm diameter with three accurately positioned black painted steel legs and ordinary steel screw thread working in a long adjustable brass bearing. A circular scale is carried on the thread and a vertical scale on the table, enabling the user to take accurate micrometer type readings.
1) 1/100
2) 1/200

Same as cat. No. 13 but screw and legs are made from rust proof stainless steel.
1) 1/100
2) 1/200

It consists of a small metal frame, supported by three legs fixed at the corners of an equilateral triangle. A screw of fine pitch passes through the center of the metal frame. The screw forms the fourth leg. The main scale (or pitch scale) is marked in a metal strip fixed at right angles to the frame. This scale is marked in millimeters with zero mark at the center (10-0-10 mm). A circular scale is fixed to the screw head. It carries a circular scale divided in 100 equal parts (In some cases it is divided into 50 equal parts). The edge of strip is used also as a reference line fro taking the circular scale reading. The disc & scales are brass lacquered & legs are made of steel black painted.
1) 1/100
2) 1/200