Abstract: An arc chute arrangement for arc quenching in electrical switching device, said arrangement comprising a plurality of deion plates, each said deion plates further comprising a pair of plates having an ablative material sandwiched therebetween; a lining means for holding said deion plates; wherein said deion plates having a chamfered profile at one corner to generate high magnetic field that drive the arc inside arc chute and said chamfered profile arranged alternatively thereby substantially lengthening the arc.

Abstract: The invention relates to an improved double break contact system for use in moulded case circuit breakers. The system comprises shaft means (8), fixed contact means (1 and 2) and moving contact means (3) mounted on shaft means (8), spring means (4) operatively mounted on the shaft means (8), holder means (5) securing said spring means (4) wherein holder means being rotatably mounted on the shaft means in a manner that rotation of the shaft means in operation rotates said holder means.

Abstract: According to one embodiment of the present invention, a contact actuating mechanism is provided with a rotary contact to make and break electrical contacts. An operating knob is connected an operating lever and to a connecting link through a U-shaped pin. The operating lever is engaged with a lock lever. The connecting link is also coupled to the rotary contact through a pivot so that the operating knob is moved to displace the connecting link to move the rotary contact to make and break with electrical contacts.

Abstract: Seal for tubular heat exchanger comprising groove with an inner edge; tongue of the diaphragm having front face extending in the radial direction and inner edge parallel to the axis of the channel; the face extending beyond the radial width of the groove in inward direction and overlapping the face of the shoulder of the channel in which the groove being provided. The tongue of the diaphragm being thus kept away from entering the groove; the diaphragm having flexibility to permit deflection of the tongue, the tongue of the diaphragm being loaded from outer side by the internal compression ring, the said internal compression ring being loaded in turn by the threaded push bolts/rods being fitted in the threaded holes on periphery of the threaded lock ring. This load is ultimately transferred to the joint between the gasket and face to achieve leak-proof joint.

Abstract: Sealing arrangement for an internal tubesheet for tubular heat exchangers comprising, a gasket fitted between a shoulder and a tubesheet, the gasket being made of spiral wound construction but without any metallic rings and without any locating groove in the adjoining components. On the outer side of the tubesheet, a channel box is provided with its inner face resting on a shoulder provided on an outer diameter of the tubesheet while the outer face of the channel box is reduced in diameter and arranged to align with the centerline of the push bolts, the outer face of the channel box resting against and attached to an annular ring and the push bolts being provided in threaded holes that reach up to the outer face of an internal flange. The push bolts, when tightened, load the annular ring, which in turn loads the gasketed joint through the channel box and the tubesheet.

Abstract: Threaded channel closure for tubular heat exchanger comprising channel header wherein the gasket is provided at the shoulder of the channel, tongue of the diaphragm is provided to apply pressure on the gasket to achieve the sealed joint, outer compression ring provided at back side of the diaphragm and being loaded by push bolts, provided at the periphery of threaded lock ring, outer compression ring being supported by channel cover, which is kept in position by threaded lock ring, characterized in that, the channel header being provided with plurality of radial holes on its periphery, approximately at the centerline of the width of the outer compression ring in its assembled condition; the outer compression ring being provided with plurality of radial through holes matching the set of holes in number as well as angular position.

Abstract: The present invention provides a system for improving the accuracy of the measurement of the osteoporosis condition of the human body parts especially bones using more than three parameters, viz., the broadband ultrasonic attenuation (BUA) quantity, the velocity of ultrasound (SOS) in the bone, the broadband ultrasonic back scattering (BUB) intensity, and the Width of received maximum (WORM) values are calculated from received ultrasound signals. The accuracy of each measured diagnostic parameter is improved by measuring the tissue thickness and the squish amount in the coupling pad instead of assuming constant thickness for the tissue. The several operating modes of the device are controlled and the frequency and the timing of the emitted ultrasounds signals are adjusted by using a field programmable gate array. The error generated in the measurement of the bone mineral density due to the variation in the anatomy and the size of the foot, is removed by using a removable footpad.

Abstract: A novel unipolar design of Secondary Isolating Contacts for Circuit Breakers which provides flexibility to build schematic logistics by exploiting programmability of the design and which is flexible for subsequent addition or deletion or replacement of SICs with minimum efforts.