AMBALA, Haryana, India
Our product range comtains a wide range of LEES DISC APPARATUS, Friction Board, Melting Point Apparatus, Linear Expansion Apparatus and Youngs Modulus Apparatus
LEE’S DISC APPARATUS For measuring thermal conductivities of poor conductors, 3 cylindrical blocks of aluminium 50 mm diameter 12.5 mm thick, with radial holes for thermometers, are clamped in a wooden frame by a screw, with 2.5 W, 6 V heating element and a set of 3 bad conductor discs.
SIMPLE AND FRICTION BOARD Inclined wood plane, 600 x 75 mm, hinged to base at one end carries a pulley at the other. A movable block enables variation of inclination of plane, a friction slide of size 100 x 65 mm which is reversible and has one side cut away for half of its area. Complete with metal roller 75 x 25 mm dia, with pan but without masses.
Consist of an aluminium block which accepts three capillary tubes and thermometer. The block is heated by two heating elements which are provided with a built in energy regulator, for uniform and shadowless illumination a lamp is provided. works on 220 V 50 Hz.
LINEAR EXPANSION APPARATUS The brass tube is 50 cms x 2.5 cm C.P. With inlet and outlet tubes for steam and opening for thermometer and reading to 1º x 110º.C. The binding posts are provided on the supports for connecting a bell, buzzer of galvanometer for indicating the exact point of contact of the screw. Provided with three rods of brass, Iron and aluminium without bell and battery.
YOUNG’S MODULUS APPARATUS The Instrument consisting of two frames connected by a link. which also carries a spirit level. A micrometer head reading to 0.01 mm is provided to re-adjust the spirit level. With two self centering wire pin chucks, a ceiling bracket also with two pin chucks, a counterpoise weight and supply of suitable wires and slotted masses.
ELECTROSTATIC KIT The kit comprises of one electroscope, one packet of metal leaves, 4 metalised spheres, 1 reel of nylon thread, and two polythene plates 75 x 75 mm, one electrophorus plate with insulating handle, 1 proof plane, two aluminium cans, one cellulose acetate strip, 1 polythene strip, and one stirrup for suspending strips, one flannel rubber, one wire hook and instructions.
A heavy cast iron base with 4 uprights, on one end of which is fitted a hand nut the other drilled with holes to carry a cast iron rod of 75 x 6 mm size bearing against narrow flats, with 10 cast iron breaking rods.
Experiment to show that the ball passes through to the ring when cold but will not pass through after being heated. Comprising a brass ball 25 mm dia, a brass ring mounted on a rod with a handle, a chain is provided to hold the ball with the ring. 171.1 Mounted on a tripod base.
WAVE MOTION APPARATUS For demonstrating longitudinal and transverse motion, consisting of 18 eccentric Aluminium discs supporting a series of metal rods. Transverse waves are obtained by straight rods and longitudinal waves by bent rods.
ORESTED’S APPARATUS Showing the action of electric current on a magnet. Magnetic needle 75 mm long with brass bearing supported by pivot mounted on a base and surrounded by a copper rod strip rectangle with two terminals.
CONDUCTIVITY APPARATUS Four metal strips of copper, brass, aluminium, iron having small grooves at outer ends for holding phosphorous and screwed on a wooden ring of outer dia 125 mm out side dia, strips meeting in the centre.
BARLOW WHEEL Disc made of copper, star shaped, adjustable for height, rotates vertically between the limbs of a horse shoe magnet when electric current is passed to the wheel through a mercury trough in the base, supplied with terminals, but without mercury.
ELECTRICAL VIBRATOR Comprises a steel rod clamped near one end through two 4 mm terminals. Which passes through a small solenoid and between the poles of a magnet. Adjustable contact points fitted through a second pair of terminals make alternating connection with an adjustable contact on the rod. The rod has a small hole at one end for the attachment of thread which passes over a bench mounting pulley and supports a scale pan. For 2 V a.c. Supplied with pulley, clamp, and scale pan.
MELDE’S APPARATUS To demonstrate the effect of vibrations in a stretched cord and to investigate relation between frequency, tension and density. Comprising an adjustable length of thin steel rod mounted in a pair of socket terminals near one end and passing through an a.c. energising coil and a permanent magnet. The other end of the wire has a small boss with clamping screw for attaching a cord. Two adjustable contacts are also fixed on either side of the armature connected to terminal sockets to provide a quick change-over switch in capacitor chargedischarge experiments etc.
THERMISTOR CHARACTERISTICS APPARATUS Study of thermistor as temperature measuring transducer electrically heated oven up-to 90ºC Thermistor (NTC) mounted in metallic tubing and protected from corrosion. Study of non-linear (exponential) characteristics Unbalance Bridge circuit with 1st degree linearization Differential gain amplifier 3.5 digit DPM as temperature scale Glass thermometer for reference Detailed instruction manual.
CHARLE’S LAW APPARATUS a bulb and tap at the upper end of one limb and other limb open. From the bottom of the ‘U’ is an outlet tube which passes through a bung and terminates in a tap. The stem below the bulb is graduated 3 x 0.1 ml, an inlet tube with Mohr clip also passes through the bung. The glass water jacket encloses the U tube. All glass parts made of borosilicate glass required only 20 ml mercury. Without mercury
DIODE CHARACTERISTICS APPARATUS Fitted with diode valve in the front panel. Workable on 220 V with stabilised power supply. Two meters are provided to read voltage and current.Output:HT: 0-250 volts at 25 mA continuously variable L.T: 6.3 volts a.c.
HOPE’S APPARATUS made of iron sheet cylinder mounted on a base having 2 tubulatures for thermometers, with a gallery for placing mixture of ice and salt. The respective temperatures of water at the top and bottom of the inner cylindrical vessel are measured over a period as the water cools. Complete with bungs and thermometers.
TORSION APPARATUS Consisting of two metallic brackets are held together with connected rods. A heavy metallic pulley mounted on one bracket & is fitted with a three jaw chuck to hold one end of the test rod, the other end being held in other chuck fixed to the other bracket. Two graduated scales are mounted on the connecting rod & two pointers can be clamped in any desired position on the test rod, with one brass & one steel test rod but without masses.
NEWTON’S RING APPARATUS To measure the wavelength of the light by the reflected system, frame 60 x 58 x 50 mm high with a glass plate mounted at an angle of 45° to reflect light downwards on a plano-convex lens of one metre focal length, resting on a glass plate 38 x 38 x 3 mm. Complete with lens.
Two glass tubes 220 mm long, one is closed at the top and other one is open and connected by 1 Meter pressure rubber tubing. Both the tubes are mounted on the brackets which can be locked in any portion on the metal supporting rods. Stand carries a graduated scale 0 to 100 cm.Mercury required for this 3 apparatus is approx.30 cm.Supplied without mercury.
EXPANSION OF LIQUIDS APPARATUS with 5 graduated on panel scales in mm. Complete with metal trough for the uniform and simultaneously heating of the 5 glass bulbs. To show different liquids have different thermal expansions. The frame has clamps to secure it to the trough and two cross members, the lower cross member having holes and upper tubules to locate the bulb tubes in bungs complete with 35 mm dia bulbs and 15 cms scales etc.