Physics Instruments

Same as above but with brass block of 12 mm thick mounted on a heavy bakelite base provided with all brass terminals.

Cat. No.	Size
1)	1 way
2)	2 way
3)	3 way

Thick brass of 10.5 mm fitted on heavy bakelite base provided with all brass terminals and screws.

Cat. No.	Size
1)	1 way
2)	2 way
3)	3 way

With brass blocks of 9 mm rectangular with all brass terminals and screws.

Cat. No.	Size
1)	1 way
2)	2 way
3)	3 way

Used in experiments on hyteresis. The thick brass sheet contact arms and the joining strips are fitted on bakelite base. Operation of the contact arm is done with a bakelite handle. The terminals are provided on the sides of the square base. Max current 5 amp. Supplied without mercury.

The four segments of gun metal are mounted ohn a bakelite base. The multi brush sweeping contacts move over either segment with a handle. Brass terminals are provided for the four segments and on the contact block.

6 way circular, with extra heavy blocks.

The brass block is mounted on thick bakelite plate. The plug and lugs are throughly interlaped for perfect locking. Terminals are provided on each segment with extra heavy blocks.

Two brass strip (nickel plated) and four terminals mounted on a bakelite plate of high insulation

Contact Resistance	: 2 milli ohm approx.
Maximum Current	: 5 Amps

Brass strip (nickel plated) with insulated knob and terminals mounted on a bakelite plate of high insulation.

Contact Resistance	: 2 milli ohm approx.
Maximum Current	: 5 Amps

Machine moulded on wooden base with brass terminals. This is a 5 Amp double pole double throw knife switch wired to reverse the current when the handle is thrown from one side to the other.

Spare translucent perspex scale graduated in 25-0-25 cm and 0-50 is provided.

Spare auto bulb 6 V, 20 W which is used in lamp & scale of cat. No. 1107 &1107A.

Suitable for use with reflecting galvanometer with rack and pinion arrangement workable on 220 volts A.C./D.C. Complete with scale and its attachment plug and cord.

The lamp house is of cast aluminum, machine turned and finished in a pleasing duco paint. The lamp house is fitted with 6 volts 20 watt bulb through built in transformer works on a 220 volts A.C. Mains. A translucent perspex scale graduated in 25-0-25 cm and 0-50 cm is used in this unit. Complete on a heavy cast iron stand with adjustable brackets for lamp house which is divided into 25 cm 0-50 cm is used in this unit. Complete on a heavy cast iron stand with adjustable brackets for lamp house and scale with cord and pin plug.

It is based on ‘GRIFFEN’ pattern which is highly suitable for reflecting ‘PSAW’ ballistic galvanometers. It consist of a heavy steel cabinet made from S.W.G. 20 sheet of size 6” x 4” x 3 ½ with printed aluminum panel on the top. In this steel cabinet, a step down transformer of 6 volts, 3.5 Amps is enclosed, which is suitable for the lamp house. The lamp house is made from aluminum - silver alloys, machined and finished in a pleasing duco paint. It is fitted with a special 6 volts 20 watt bul which is connected to the transformer with a special male - female detachable plug. The lamp house is fitted with rack and pinion arrangement for focussing. A double convex lens made from imported glass of 18 mm dia. of 4” focal length is used in it for better results. The lamp house can slide up and down along the vertical rod fixed on a detachable box. The inclination of the lamp can be adjusted in vertical plane. Bright light through the convex lens falls on the concave mirror of the ‘PSAW’ ballistic perspex scale fitted in a special bracket above the lamp house which is divided into 25-0-25 cm and 0 to 50 cm.