Demonstration Dynamo   (EE - 679)

This model uses the same basic assembly as the motor, but is mounted on a base plate 230 x 90mm approx., which also carries a hand drive pulley 120mm dia. coupled to the smaller dynamo pulley by a rubber belt to give a step-up ratio. Electrical output is via a pair of 4mm sockets and a light emitting diode is provided as simple output indicator. The model may also be used as a motor on a 6-8V D.C. supply.

Bicycle Dynamo Assembly   (EE - 680)

For showing slow A.C. on an oscilloscope or meter or foi demonstrating the use of a dynamo, mounted on a base and provided with gears driven by a hand crank for rotation. Two 4mm socket terminals are provided for the dynamo output, connected in parallel with an M.E.S. lamp holder and 2.5V bulb.

Carbon Arc Lamp   (EE - 681)

Mounted on wooden base to explain working of arc lamp, operates on 12 volts A.C./D.C.

Molecular Movement tube   (EE - 682)

Straight tube filled with glass beads and mercury under high vacuum. When heated by spirit lamp the glass beads travels randomly inside the tube and hence generate the idea of ' Brownian motion of molecules.

Friction Vacuum Tube   (EE - 683)

Straight tube filled with Neon gas. Friction is produced over the tube by rubbing a silk cloth, the bright red colour light can be seen in dark ambient.

Roentgen X-Ray tube   (EE - 684)

Consists of cathode ray tube. Cathode rays from cathode are allowed to fall on a high density, high atomic weight material say, Tungsten. Under reflection the cathode rays are converted into x-rays. Works on 10 cm spark gap induction coil. The x-rays produced are soft x-ray but must be prohibited for over exposure.

Comprises a glass sphere with concave disc electrode generating cathode rays and focus on a tungsten target placed at 45° angle, at the inner end of arm exactly opposite.

Fluorescent X-Ray Screen   (EE - 685)

The screens are framed and covered by a protecting glass plates, suitable for the observation of emission of x-ray from the source.

Size(cms) a) 10x10 b) 10x12 c) 12x15 d) 15x25

X-Ray Tube model in wooden case   (EE - 686)

Consists of wooden case.

Complete X-Ray Unit   (EE - 687)

Combined unit with built in x-ray stand, x-ray screen holder, induction coil, working on 12V DC, 6 Amps with X-Ray tube & screen.

Reflected Cathode Rays Tube   (EE - 688)

One cathode disc at lowest side in front of upper side convex anode which acts as reflector and the cathode disc coated with fluorescent materials is biased so as to receive the ions from anode then the cathode shall glow under the impact. When the current is reversed the glow becomes very bright showing the direct impact of cathode.

Spectrum Tubes   (EE - 689)

These tubes are straight and available in two sizes 20cm & 26cm in length. The electrodes are placed in either side of the tube and connected with fine capillary tube in between. Available with (a) Helium, (b) Neon, (c) Ar, (d) Hydrogen, (e) Oxygen, (f) Nitrogen, (g) Iodine Vapours, (h) Alcohol vapours, (i) Carbon dioxide (j) Carbon Monoxide (k) Chlorine (1) Deuterium (m) Krypton (n) Sulphur (o) Xenon (p) Bromine etc. filled. Suitable for the observation of the typical spectrum of the gas filled in side the tube.

Spectrum tube on stand with power supply   (EE - 689/1)

Spectrum tube on stand without power supply   (EE - 689/2)

Positive Tube   (EE - 690)

With perforated anode, showing vividly various properties of positive rays.

Magnetic Effect Deflection   (EE - 691)

Running cathode rays are visible to naked eye by glowing path on fluorescent screen. The deflection of the cathode rays under magnetic field may be demonstrated easily by moving magnet across the same.