Decade Condenser Box / Indudctance BoxSound

MAGNETISM

ZES 328. Horse Shoe Magnets :

Made of steel, half red and half blue ( for N and S ) spray painted, with keeper.

Type

 Length Width Thickness

(a)

 50 mm 12 mm 5 mm

(b)

 75 mm 12 mm 5 mm
(c) 100 mm 12 mm 6 mm

ZES 329. Bar Magnets, Alnico :

Made of cobalt steel , in pairs, half red and half blue ( for N and S ) spray painted, very strong, with keepers.

Type

 Length Width Thickness

(a)

 50 mm 12 mm 8 mm

(b)

 75 mm 12 mm 8 mm
(c) 100 mm 12 mm 8 mm
(d) 150 mm 12 mm 8 mm

ZES 330. Cylinderical Magnets, Alnico :

Made of cobalt steel, 10 mm dia, in pairs, half red and half blue (for N and S) spray painted, very strong, with keepers.

Type

(a)

(b)

(c)

(d)
Size 50 mm 75 mm 100 mm 150 mm

ZES 331. U Shape Magnets, AlInco :

Made of cobalt steel, 12 x 6 mm dia, in pairs, half red and half blue ( for N and S ) spray painted, very strong with keeper.
Type (a) (b) (c)
Size 50 mm 75 mm 100 mm

ZES 332. Load Stone :

Magnetic Iron Ore. Selected pieces.

ZES 333. Bar Magnet, Ceramic :

Ceramic magnets for good magnetic strength, half red and half blue ( for N and S ) spray painted. Dimensions : 50 x 10 x 5 mm.

ZES 334. Ring Magnet, Ceramic :

An annular magnet with face poles ( i.e. polarised along its cylindrical axis).

Dimension : 12.5 x 30 x 6.5 mm. Internal diameter x external diameter x thickness.

ZES 335. Magnadur Magnets :

50 x 10 x 5 mm as used in a Westminster Electromagnetic Kit.

ZES 336. Stirrup :

Of brass wire for suspension of magnets in electrostatic experiments.

Dimensions : Length 50 mm approx., Height 45 mm approx.

ZES 337. Ball Ended Magnets :

Chrome steel with true poles length 20 cms.

ZES 338. Sprinkler :

For iron and steel filings.

ZES 339. Iron Filings :

For indicating lines of force. Pack of 500 gms.

ZES 340. Iron Rods, Soft :

Size 150 x 10 mm length x diameter.

ZES 341. Steel Rod :

Size 150 x 10 mm length x diameter.

ZES 342. Soft Iron Plate

Size 75 x 25 mm length x breadth.

ZES 343. Materials Set For Magnetism and Electricity :

Comprises 11 pieces of magnetic and nonmagnetic materials each
100 32 mm ; thickness, metals 0.9mm, nonmetals 1.6 mm approximately. Materials provided are aluminium, brass, cardboard, copper, lead, GUN metal, perspex, polythene, steel, wood and zinc.

ZES 344. Magnetic Needle, Brass Bearing :

A carbon steel needle with brass cup bearing.

Type (a) (b) (c) (d)
Size 50 mm 62 mm 75 mm 100 mm

ZES 345. Magnetic Needle, Jewel Bearing :

A carbon steel needle with jewel bearing.

Type (a) (b) (c)
Size 50 mm 75 mm 100 mm

ZES 346. Needle Stand :

For magnetic needle with plastic base 72 mm dia and 6 mm dia aluminium pillar supporting a steel needle pivot. Over all height of stand 100 mm approx.

ZES 347. Plotting Compass :

In metal case, with card dial, dia 20 mm.

ZES 348. Plotting Compass :

For plotting equipotential lines ; 20 mm diameter with jewelled bearing, and brass pointer at right.

ZES 349. Plotting Compass Both Side Glass :

With needle pivoted between top and bottom glass plates, without dial, dia 20 mm.

ZES 350. Pocket Compass :

In plastic screw cover case 55 mm dia, card marked with points of the compass & degrees.

ZES 351. Compass :

43 mm diameter, graduated in degrees and with compass points marked. In plastic case with hinged cover and ring for lineyard. A locking mechanism protects the needle during transport.

ZES 352. Educational Compass :

Card marked with points of compass and degrees ; 175mm overall diameter, 110mm needle in case.

ZES 353. Dip Needle, Simple Pattern :

Comprising a circular scale, 75 mm dia. 0-90 . four times, supported on a rectangular base. The needle is carefully balanced on steel pivots working in brass bearings.

Size of base 100 x 60 mm.
Overall Height 100 mm Approx.

ZES 354. Dip Circle :

An accurately balanced magnetic needle, strongly magnetised is fitted with hardened steel pivot working in jewels cup bearings. The needle can be easily removed for reversal. The inclination scale is of chrome brass graduated in degrees 0-90 four times. The case is made of nonmegnetic cast alloy, duco painted, has easily removable plate glass window and rotates fully on a heavy brass base, its rotation being measured by a brass chrome dial reading 0-360 . It is fitted with levelling screw and sprit level.

ZES 355. Mariners Compass :

With aluminium bowl gimbals and mounted in wood box, side 125 mm, with sliding lid. Diameter of card 75 mm.

ZES 356. Deflection Magnetometer :

Comprising a stout bakelite box, 100 mm dia, with aluminium dial graduated in degrees 0-90 four times, anti parallax mirror slot and replaceable steel pivot. The short magnetic needle has a jewel bearing and a light aluminium pointer designed for precise reading and maximum damping.One metre long single piece wooden nicely polished base with embedded two half metre scale reading from the centre of compass box ( Magnetometer) i.e. zero at centre of both the scales. Complete with compass box and levelling screw.

ZES 357. Spare Compass for Above

ZES 358. Vibration Box :

To compare the magnetic moments of magnets and to determine moment of intertia etc. Consisting of a polished wooden box fitted with sliding glass door. The top of the case is slotted and carries a glass tube fitted with torsion head to support by means of silk fibre, a brass stirrup to carry magnets etc. The base of box is fitted with a mirror strip, with a longitudinal index line. Internal dimensions of box 160 x 66 x 66 mm approx. Length of tube 140 mm approx. Size of stirrup 50 mm long x 45 mm high approx. Complete with one each 50 and 100 mm bar magnets, and one each 50 and 100 mm brass bars.

ZES 359. Magnetising and Demagnetising Solenoid :

A helical coil 310 mm long of DCC copper wire mounted on a wooden board, number of turns marked with 1 metre connecting cable, fuses, push switch compass and soft iron rod 350 x 10 mm, internal dia of coil 25 mm for use on 230 V main supply.

ZES 360. Electric Bell :

With detachable plastic cover, dome gong. For use on 3 to 12 V a.c. / d.c Supplies.

ZES 361. Tangent Galvanometer :

A bakelite ring or bobbin is of 6 " (165 mm) diameter with 3 windings of 2, 50 and 500 turns. The magnetometer is supported on a brass tube fitted on an ebonite plate which is free to revolve in the base of the instruments. The magnetometer and the ring can both be rotated independently of the base which is with levelling screws.

Compass box consists of a bakelite case with metal 100 mm dia dial graduated in degrees and anti parallax mirror. Cobalt steel magnet and aluminium pointer are mounted on special synthetic sapphire. The needle moves on special pivot. The above combination makes the needle practically frictionless.

ZES 362. Demonstration Induction Coils or Induced Current Apparatus :

Two coils wound on separate bobbins, one having many turns of fine wire and the other with few turns of heavy wire. Demonstrate that induced potentials are produced either by movement of a permanent electromagnet or by a change of current in one coil, fitted with insulated 4 mm socket terminals and supplied with a soft iron core, outer coil is 12.5 cm. Long and 5 cm dia.

ZES 363. Induction Coil

The primaries are wound with thicker copper enamelled covered wire on letherite pipe in two layers. The secondary coils are divided into two parts and are given heavy insulation, each layer is wound in the cover of butter paper and after completing the winding the entire is dipped into hot wax, so that each layer is sealed against moisture effect.

The coils are housed in a teakwood base, voltage tested condensers are fitted inside the wooden polished base. Handles to get the spark are on it the make and break points are of silver. One point is adjustable to get any cycle. On off reversing switch commutator, working on 6-12 V d.c. Spark in Air :

Type (a) (b) (c) (d) (e)
Size 10 mm 25  mm 50 mm 75 mm 100 mm

ZES 364. Dissectible Induction Coil :

Most suitable for demonstration. Secondary coil and capacitor can be easily separated out. With arrangements for disconnecting and capacitor, while in operation. All connection clearly visible spark length 25mm.

ZES 365. Barlow Wheel :

A star shaped copper disc 90 mm dia, rotatable vertically on pair of adjustable centres and dipping into small mercury trough between the vertical limbs of a small horse shoe magnet on a wooden base 150 x 100 mm, disc adjustable vertically on a metal pillar 75 mm high which is connected to one of the two terminals mounted on the base. The other terminal is connected to the mercury trough. It operates on 4 V. Supplied without mercury.

ZES 366. Magnetic Field Table :

A wooden tables support a aluminium ring wound with three coils of 18 s.w.g enamelled copper wire of 5, 10 and 20 turns respectively, connected to bakelite 4 mm socket terminals at one edge of the board.

Dimensions :

Table 400 x 275 x 90 mm height.

Outside diameter of coil former 160 mm.
Overall height of apparatus 170 mm.

ZES 367. Helical Coil :

For projection of the magnetic field characteristics of a helical coil. Coil of 10 turn on a plexiglas panel with two 4 mm connecting sockets, working current 5A approx.

ZES 368. Circular Coil :

For projection of the magnetic field characteristics of a circular coil 15 cm diameter approx. On a plexiglas panel with two connecting sockets 4mm.

ZES 369. Earth Inductor :

All non magnetic metal. Auto Spring release through 180 . The aluminium ring with brass collars and wire wound is fitted in a aluminium frame and is controlled by the spring. The sudden deflection can be had by pressing a knob through 180. Duco finish 500 turns.

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Decade Condenser Box / Indudctance Box Sound