Abstract: A jack hold down apparatus is provided for threadably engaging an elongate, projecting externally threaded post member and advancing and retracting therealong for respectively engaging and disengaging an edge part of an automotive jack for holding the same in, and releasing the same from, engagement with a given surface. The apparatus comprises a first component comprising a jack-engaging member including a body having a through opening for receiving the post member therethrough and defining an axis, a radially projecting lip portion for engaging an edge part of the jack, and an axially projecting connecting portion for receiving a second component. The second component comprises a manually graspable knob having a through opening coxially alignabel with the through opening of the first component and a cooperating connecting portion alignable with the first component connecting portion for assembly therewith in a generally radial direction, so as to be non-removable therefrom in the axial direction.

Abstract: An ink-furnishing apparatus for continuously supplying ink to an ink cylinder from an ink rail even during high speed operation of the ink cylinder. An ink transfer surface of the ink rail has a first solid substance which is superior to a cast iron constituting the ink rail in terms of separation of ink therefrom. A peripheral surface of the ink cylinder has a second solid substance which is superior to the first solid substance in terms of adhesion of the ink thereon. While said first solid substance has a surface which makes a larger contact angle with a surface of the ink than a contact angle made between the surface of the ink and the surface of cast iron constituting said ink rail, said second solid substance has a surface which makes a smaller contact angle with the surface of the ink than said larger contact angle.

Abstract: The invention provides a mine conveyor, for use in hazardous atmospheres, comprising an endless conveying belt; an electric motor; and a torque transmission arrangement located between the electric motor and the endless conveying belt, the torque transmission arrangement incorporating a modulated wet clutch and a torque converter, with a drive drivable by transmission gearing and adapted to make driving relationship with the endless conveying belt; and a control system for controlling the torque transmission arrangement, the system comprising an electro-hydraulic control circuit incorporaitng an intrinsically safe (as herein defined) unit to monitor and control the conveyor, at least one microprocessor incorporated in the intrinsically safe unit, the microprocessor incorporating a memory whereby a ramp starting mode, a running mode, and a stop mode required for the conveyor are preprogrammable into the microprocessor, and at least one transducer included in the electro-hydraulic control circuit to monitor at

Abstract: A device (10B) for fixation of a skull (20) to adjacent bones (21) of the spine has one generally circular bight (13B) in a curved plane starting generally perpendicular to the plane of two straight spaced complanar portions (11B) and curving away therefrom, and another bight (12B) of generally V-shape with its apex (14B) extending towards the substantially circular bight (13B) so that the apex (14B) of the V-shaped bight can be accommodated between the adjacent spinous processes (16D, 16E) closest to the skull (20) against which the generally circular bight (13B) lies.

Abstract: A protective boot is suited to protect from foreign matter the intermediate mechanism of a tool having jaws and handles which are operatively interconnected by the intermediate mechanism.

Abstract: An improved fastener provides axially extending teeth on a narrow shoulder adjacent the fastener head. The teeth bite into sheet material, and are particularly useful in biting into the surface of a thin sheet which is fastened to a thicker sheet material. The teeth extend from a shoulder formed on a medial collar between the head and a threaded shank. The narrow shoulder has a larger diameter than the end of the threaded shank to which the shoulder is joined. The teeth can be formed by cold-flow of the material of the shoulder so that the teeth axially extend from the outer peripheral edge of the shoulder in order to bite into the thin sheet metal proximate the annular periphery of the aperture in which the threaded shank is engaged. Preferably, the teeth axially overlap the threading of the shank which extends entirely to its junction with the shoulder, and the teeth are fabricated after the shank thread in order to enable such overlap by the teeth.