Popular Science Apparatus Workshop Private Limited

This air pump is suitable for a number of

classroom demonstrations, single barrel

made from steel pipe fitted on wooden

base. The aluminum plate is provided

with a stop cock, air inlet screw and a

connection for rubber pressure tubing.

A high class telescope for school students for all around purpose. It is light and easy to manipulate and has a high magnifying power. Overall length of astronomical telescope is 85 cm, fitted with high class achromatic objective of dia. 45 mm, focal length 22 “. Its high magnifying power provides extremely sharp images. The telescope is provided with an extra erector tube which can be screwed into the main tube after removing the eyepiece and this astronomical telescope is used as a terrestrial telescopes. Complete with velvet lined case. 1258 (a) superior quality with high class achromatic objective 1258 (b) regular quality

The magnifier i fitted with a precision lens of 150mm diameter and with an optical glass lens of 3x. It has maximum possible power for a lens of its size, consistent with gives fatigue- free, stereo view equipped with round fluorescence tube (22Watt ) which has shadow -less illumination. It is fitted o a universal stand fully adjustable vertically and horizontally, works on 220VA.C

For showing that electrostatic charges is always on the outer surface. The conical shaped silk net is

attached to a ring mounted on an insulating stand and may be turned inside out by means of attached

strings.

An insulating stand on tripod base, hammers tone finish, three different shapes of medium size

conductors are provided in the set :

A) Conical shaped conductors: shows that the distribution of static charge on a conductor depends

upon the curvature of the surface.

B) Hollow sphere shaped conductor: show that charge resides on the outside of the conductor.

c) Cylindrical shaped conductor: shows that electrostatic charge is only on the outer surface of the conductor.

These wi res are used for

connections in various electrical

and electronics experiments.

Supplied in 100gmpacking only.

SWG No. -20, 22 & 24.

To overcome the difficulties experienced in mechanical stop a clock, PSAW has introduced quartz controlled 3 ½ digit stop clock. The start/stop operation is by means of a mini toggle switch and reset by a push button. Reset is possible only in stop mode to avoid accidental resetting while the clock is running
Specifications :

Range :                        999 sec.

Resolution :                0. 1 sec.

Accuracy :                  0. 1% (quartz controlled)

Display :                      12. 5 mm bright seven   segment display

Working voltage : 230 volts a. C. +-10%

Reset : by push button

Least count : 1 second

For the rapid examination of spectral composition of white light, metal tube with draw out focusing and an adjustable slit fitted with achromatic objective glass and 3 element prism. Complete in wooden box.

They include all principles of geometrical solids and figures discussed in elementary mathematics and physics are included. 16 different solids are made of smoothly finished hardwood, medium sized, approximate size of each figure is 5 cm. All are supplied in a sliding box.

For comparing the densities of liquids by measuring the

heights of two columns of liquid produced by applying

suction to the short center limb. Comprising three limbed

glass tube mounted on polished wooden stand with meter

scale 45 cm. Long with '0' at the bottom. The scale is

divided in centimeters and millimeters. Supplied w/o

rubber tube and pinch cock.

this coil, specially designed for school use is suitable for vacuum tubes and audiometers etc. It is wound with insulated copper wire, has tungsten contacts and on/off reversing switch as communicator. Voltage tested condenser are fitted inside the teak polish wooden box. The top of the wooden box is provided with sun mica and relevant data engraved on the sun mica. Terminals are provided for H. T. Output and L. T. Input of the coil. Up to 50 mm spark is obtained with 4 to 6 volt D. C. Input and spark from 50 to 100 mm can be obtained by 6 to 12 volt D. C. Input.

(Research model half shade for 400 mm tube) Sensitive rotating half shade device.

Circular scale 0-3600 combined with sugar

scale - 0 to 300 s to + 1300 s Vernier least

count 0.050. Aluminum casted rigid body.

Arrangement for 35 W sodium lamp light

source, input 220/230 V AC. Borosil glass

tube 100mm&200mmcup type.

To demonstrate the pressure of the atmosphere. Two concave aluminum cups having diameter either 62 mm. Or 75 mm. Are provided with handle and stop cock.

In metal frame and bake lite handle, chrome plated.

A         50mm            20cm                 2.25x

B          50mm            10cm                 3.5x

C          60mm            10cm                 3.5x

D          60mm            15cm                 2.5x

E           60mm            20cm                 2.25x

F           75mm            15cm                 2.5x

G           75mm            10cm                 3.5x

H           75mm             20cm                2.25x

I            100mm           15cm                 2.5x

J           100mm           20cm                  2.25x

Made from an alloy of magnet, nickel and copper, with a low temp. Coefficient. This wire is particularly suitable for the construction of resistance coils etc. Or any application where accuracy of ohmic value is the important factor and electrical loading is low. Supplied in 100gm packing only.

S. No. SWG No.Dia.

(In mm)

1) 200.71

2) 220.56

3) 240.45

4) 260.40

Chromium plated with cylindrical weight with long hook.

Cat no.              Capacity

1              10gm each weight, set of 12

2              20gm each weight set of 12

3              50gm each weight set of 12

4              100gm each weight set of 12

Based model developed by Hilger & watts ( London ).

A quality collection of minerals, in wooden box, 375x300x40mm, with partitioned tray containing 50 specimens may be removed from bags for detailed examination. Each specimen is labeled also on the box lid provides the geological name. But in wooden glass show case. 450x300x40mm

It consists of one voltmeter of 10 V, one millimeter of 25 mA. Two 4mm socket terminals are provided for the connection of unknown resistance & another two terminals for D.C. supply. As on/of switch and a potentiometer of 25 ohms, 3 W is also provided. The whole system is enclosed in a superior quality plastic box. Supplied without resistance coil and D.C. supply.

1 ½ meter long for PSAW he -Ne laser high quality precision bench suitable for more advanced work. This all metallic double rod bench 1 ½ meter long is supplied either with brass rods or with stainless steel rods. Durable heavy metallic feets are provided with third supporting rod. Consist of three sliders, one.

Two pith balls are suspended by a silk thread from an insulating stand approx. 15 cm high.

A ventilated lamp house having an open front with extended sides finned externally for heat dissipation and vertical internal grooves to accommodate a slit plate and cylindrical lens. It has a light source comprising of a 12 volts lamp in a holder with one meter of twin flex having banana plugs. Complete with metal slit plate having single and triple slits and whitened on one side and other side matt black.

This is a good general purpose laboratory instrument. It employs an achromatic objective of 25 mm aperture and 17. 5 cm focal length. The telescope is mounted on a sturdy stand with ½”steel C. P. Rod, focus by smooth rack and pinion, 10 x rams den eyepieces are used. Supplied with scale and scale holder. The sensitive focusing adjustment and wide range of working distance make this telescope a useful laboratory instrument.

The cone bearings are of selected

material and the upper and lower

parts of the arms are turned and

ground in one operation giving the

most accurate alignment. Clamps

for telescope and prism table are

designed so that no strain cones

on the cone bearings from

clamping, thus avoiding any

disturbance

Rheostat of excellent quality. They are wound with heavily oxidized resistance wire upon a vitreous enameled steel tube. The winding is locked into place with ceramic cement. The tube is carried upon robust enameled die-cast end stands. 4mm socket terminals are fitted, allowing for rheostat or potentiometer connection.

25 x 25 cm in size, used for producing static charge.

Rust proof set of five including hanger sensitiveness2%to 3%.

Cat.             No. Capacity

1)                10 x 5 gm.

2)                20 x 5 gm.

3)                 50 x 5 gm.

4)                 100 x 5 gm.

5)                  250 x 5 gm.

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.

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

Copper cylindrical body with conical top and short neck for bung. Fitted with steam outlet tube riffled for rubber tubing.

A. Cap. 1 liter

B. Cap. 2 liter

C. Cap. 3 liter

Cylindrical body with conical top and short neck for bung. Fitted with steam outlet tube riffled for rubber tubing.

A. Cap. 1 liter

B. Cap. 2 liter

C. Cap. 3 liter

This hygrometer-thermometer indicates the

indoor humidity and the indoor & outdoor

temperature. It features a LCD display with

digital alarm clock, minimum - maximum

temperature memory read, wall mount or

folding stand option, 9.8 foot outdoor

weather-proof sensor wire and 1AAbattery.

The traveling microscope consists of a cast iron base with machined vee - top surface and is fitted with 3 leveling screws, one being fixed. The microscope can travel horizontally 22 cm and vertically 15 cm with the help of slides. The slow motion knobs are provided for taking accurate readings. Vernier readings 0. 01 mm or 0. 02 mm. The microscope tube consists of an eyepiece 10 x with 15 mm or 75 mm objective, for holding objects horizontal stage, made of milky cenolite sheet provided on the base.

It comprises of a spring mounted steel vibrator arm which carries a contact connected in series with a solenoid. The free end of the vibrator carries a marking point which strikes the paper tape through a disc of carbon paper, thus making the tapes once for each oscillation. It works on 12 volt, 500 MA A. C. Power supply. The complete instrument is mounted upon a polished wooden base and 4 mm socket terminals are provided for electrical connection. Complete with one dozen round carbon papers and roll of paper strip.

The PSAW vertical reading microscope consists of a microscope with rack focusing adjustable vertical column. The stereotyped design of the vertical column moving through 15 cm by rack & pinion is now replaced by a superior quality vertical pillar carrying the scale with the entire 15 cm vertical lift by smooth rack & opinion, moving inside a heavy vertical column carrying the brass vernier. Vernier spring is loaded for precise apposition to the scale. A guide slot & key ensure up &down movement in the same plane. The stainless steel scale & vernier is machine divided to accuracy within 0. 01% or better. The horizontal microscope tube is mounted on the vertical column, and is adjustable by smooth rack & pinion, through twin knobs on both sides. The microscope moves on the machined inter ground guides

Microscope: Mounted on a traveling carriage fitted with 10 x rams den eye piece, cross line graticule, achromatic object 75 mm working distance, focusing by rack &pinion.

Scale : Graduated in half millimeters on inlaid strip of nickel silver, vernier attached, microscope traverse, 16.5 cm.

Base : Heavy cast iron, top nicely machined, traveling carriage slides on the top, which can be clamped in any position. Fine motion screw for finer adjustment.
Complete with case.
Motion : Special design measure object in X as well as in Z direction.

made from soft wood, smoothly operating graduation up to 50 cm, provided with aluminum channel for smooth movement of the jaw.

For demonstrating wave motion. Helical coil of

flat section tampered steel wire. Coil dia 7.5cm

length closed 10cm fully extended 3mt.

It consists of 18 aluminum discs

supporting a series of iron nickel

rods. On revolving the handle the

motion is transmitted successively

from one rod to the next, appearing

as a wave traveling to the top and

back. The movement of the waves

can be observed. All metal parts are

fitted on a superior quality polished

wooden board.

A. 3” x 2” x½“

B. 4” x 2.5” x 1”

Searle's pattern. Spirit level mounted in two rectangular cast iron frame with one end resting on point of micrometer screw, fitted in one frame, the second end of spirit level pivoted in the second frame. The micrometer is provided with 10mm on either side of the zero and vernier reading 0. 01mm. Complete with ceiling bracket having two self centering chucks and tension weight. The apparatus is black stove enameled finish in case.