Abstract: A foldable snow compactor has a center pan with a pair of operatively positioned wings extending from the ends thereof. The wings are mounted for pivotal movement about axes fixed in relation to the center pan. Single hydraulic piston-cylinder units are employed to pivot the wings through arcs of approximately 180.degree. between their operative extended positions and inoperative positions located rearwardly of the center pan and substantially entirely within the width dimension thereof.

Abstract: Connection means for connecting two components such as conveyor channel sections or guide sections includes an elongate connector. The connector is insertible into laterally-open recesses formed in coupling elements attached to the two components. The laterally-open recesses define an elongate aperture which is slightly longer than the connector so that the connector is received within the aperture with a predetermined amount of axial play. A retaining device prevents axial movement of the connector within the aperture by filling up the space available for said predetermined amount of axial play. The retaining device comprises a C-shaped resilient member and a wedge-shaped member. The resilient member is made of corrosion-resistant, resiliently-deformable plastics material, and the wedge-shaped member is made of metal. The wedge-shaped member can be driven into the resilient member to expand the resilient member against the walls of said space, thereby fixing the retaining device in position.

Abstract: A socket adapted to receive an integrated circuit having a body with outer opposed walls, having upper edges and a plurality of substantially flat contacts biased to a closed position within the socket body. The leads of the integrated circuit to be tested engage the contacts. The contacts extend over the upper edge of the walls and are then turned downwardly to form a neck portion of reduced width compared to the width of the contact disposed within the socket 40.

Abstract: A MacPherson strut type suspension including a shock absorber operatively disposed between vehicle wheels and a vehicle body of a motor vehicle, the shock absorber having a piston rod; a coil spring disposed in association with the shock absorber to elastically support the vehicle body; a core member secured to an end of the piston rod of the shock absorber; an insulator rubber securely connected between the core member and the vehicle body; and a stop device for restricting the movement of the core member in the axial direction of the piston rod of the shock absorber when the axial movement of the piston rod exceeds a predetermined distance, thereby effectively damping high and low frequency vibrations applied to the suspension while prolonging the life of the insulator rubber.

Abstract: A coil for use in a coreless motor comprises a flat disc shaped portion in which a coil wire extends between two peripheral points which are spaced 180.degree., coil turns of the coil being successively displaced in a peripheral direction, and a cylindrical portion in which the wire is disposed to interconnect portions thereof at the peripheral edge.The coil is manufactured by a winding machine having a winding head including a first disc and a freely rotatable second disc. The second disc has a diameter slightly larger than that of the first disc and acts as a guide. Each turn of the coil is wound across the upper surface of the winding head and about the same for about 180.degree.. Adjacent turns are successively displaced a little in the peripheral direction. After winding, the coil is shaped into a cup shaped configuration.

Abstract: In accordance with the present invention, there is provided an improved instrument panel for an automotive vehicle which comprises a one-piece, elongated sheet material structure adapted to extend between front pillars of the vehicle. The sheet material structure has a panel portion which forms a passenger's head impinging zone.According to the present invention, the sheet material structure is further provided with a weakened panel portion at a location other than the panel portion forming the passenger's head impinging zone. The weakened panel portion is adapted to promote the absorption and dissipation of impact energy by weakened part of the sheet material structure permitting controlled deformation and breakage.

Abstract: A printing process employing a water-based foamable ink composition comprising the following steps:(a) foaming the ink composition,(b) applying a coating of the foamed ink composition to the surface of a gravure cylinder which has an array of open cells spaced on the surface thereof,(c) doctoring the surface of the cylinder to convert said coating into discrete thin membranes spanning said cells, and(d) transferring the membranes to a web surface, either directly, or indirectly via one or more intermediate transfer rolls.

Abstract: A tunnel drive shield has a front shield and a rear shield. The front shield is a knife shield, and the rear shield has a hood and a plurality of elongate members. The hood is connected to the front shield so as to be movable in all directions. Between the hood and the front shield (or the support frame for the knives of the front shield) is provided means for holding the two shields at a given angular setting. The connection between the two shields enables them to be angled relatively to each other to a limited extent in all directions, so that the original length of the entire drive shield is shortened, and the ability of the shield to negotiate curves is increased.

Abstract: An electrolyte anion exchange sensor having a first diffusion membrane is spaced apart from an anion exchange membrane to form a cathodic cell. A second diffusion membrane is spaced apart from the anion exchange to form an anodic cell. CO.sub.2 flows through the first membrane and is ionized. The bicarbonate ions flow through the anion exchange membrane into the anodic compartment and reacts to form CO.sub.2. The current change in the electrolyte path corresponds to the amount of CO.sub.2.

Abstract: An apparatus for manipulating a workpiece or the like comprising a pair of inger assemblies mounted on a common support. The finger assemblies have belts with contact surfaces arranged in a confronting relationship. A first operating mechanism is provided for moving the finger assemblies along a first axis towards each other to grip a workpiece between the belt contact surfaces. A second operating mechanism is provided for rotating the belts about the first axis in order to impart a corresponding rotation to the workpiece gripped therebetween. A third operating mechanism is provided for moving the belts in either the same or opposite directions in order to impart either translational movement to the workpiece along a second axis perpendicular to the first axis or rotational movement to the workpiece about the second axis.

Abstract: A hacksaw with an improved mechanism for adjusting the tension on the blade. The mechanism includes a lever for vertically moving a rod to pivot a rocker arm to place tension on the rocker arm-held blade. The rod has a manually rotatable cross-member provided at its lower end. The rocker arm has a transversely extending seating groove provided on the lower surface of its rear portion to receive the cross-member and to retain it therein against rotational movement. The cross-member is rotatable by the user to provide a positive and replicable blade-tensioning means which is free from infinite adjustment-caused creep.

Abstract: A control system for a fume hood, wherein limit switches sense the position of the sash, and pressure and light sensors monitor pressure changes in the fume hood and ambient light. A low volume fan continously draws air through the fume hood. When the sash is opened the high volume fan is actuated. Air flow is monitored as the sash position is changed; and an alarm system is actuated when an unsafe condition exists.

Abstract: An apparatus to allow a prospective customer of articles of clothing to try on one or more articles of clothing without actually putting the articles of clothing on his or her person. This is accomplished by means of an electronically produced full figure image which is composed of the customer's head and a model's body, the model's body attired in articles of clothing to be presented. The composite image is viewed by the customer on a television screen and this gives the effect of the customer being attired in the articles of clothing presented.

Abstract: A clutch position selector valve for use with a transmission for an industrial vehicle. The selector valve selectively establishes communication between a fluid pressure source and a forward clutch chamber or a reverse clutch chamber. The selector valve comprises a valve body having an inlet port communicating with the pressure fluid source, a forward clutch port communicating with the forward clutch chamber, a reverse clutch port communicating with the reverse clutch port and a drain port communicating with a fluid reservoir, and a valve element selectively establishing communication between the inlet port and the forward or reverse clutch ports. The valve element is removably and reversibly disposed within the interior of the valve body and cooperates with a selector lever to shift the element between the forward and reverse positions. This reversible feature permits the operating lever to be located on either side of a steering column for convenience of operation.

Abstract: A fixing bridge for attachment to the goaf side of a channel section on a scraper-chain conveyor, is provided with connectors for the attachment of anchoring devices. A first connector is provided adjacent to one end of the fixing bridge, and a second connector is provided adjacent to the other end of the fixing bridge. The second connector is vertically off-set with respect to the first connector.

Abstract: A mine roof support unit has a roof bar supported on a floor sill by hydraulic props. The floor sill is constituted by a face-side floor sill part and a goaf-side floor sill part. The two floor sill parts are telescopically interconnected. Each of the floor sill parts supports a pair of hydraulic props. Hydraulic rams are provided for moving each of floor sill parts relative to the other floor sill part in the direction of roof support unit advance.

Abstract: An oxygen analyzer which measures the level of dissolved oxygen in a liquid stream. The measuring process embodies chronoamperoemetry of pulsed potential voltammetry. The signal from the electrode is real time averaged. The analyzer does not require temperature, salinity or pressure compensation circuitry and does not have to be calibrated repeatedly.

Abstract: A pattern utilized to prepare a diffraction grating, or an element of a semiconductor device, for example a silicon island, or a device isolation pattern or a semiconductor element, such as a MOS FET, is formed by the steps of forming an oxidizable region of a predetermined pattern on a substrate and oxidizing the oxidizable region for forming an oxide region pattern in at least a portion of the sidewalls of the oxidizable region. The resulting pattern, which is extremely fine and formed at a low cost, has a sufficiently large height with respect to its width. Furthermore the pattern can be formed at a relatively low temperature.

Abstract: Apparatus for controlling the position of a mineral winning machine, such as a plough, movable along a guide at the mineral face side of a scraper-chain conveyor employs a connector bracket at the goaf side of the conveyor to which a floor-engaging skid plate is pivotably linked. A beam extends from a roof support and is also pivotably connected to the skid plate remote from the conveyor. A pair of piston and cylinder units are pivotably connected at their upper ends to the bracket. One of the units is pivotably connected to the skid plate and the other is pivotably connected to the beam. By operating the units together the skid plate can be held against the floor over part or all of its lower face while the conveyor goaf side is raised or lowered accordingly.

Abstract: A non-expansible linkage bracelet and method of manufacture thereof, wherein the bracelet includes: a set of laterally adjacent top links having channel-shaped sections with .Iadd.width dimensions defined by .Iaddend.parallel side members .Iadd.which are .Iaddend.joined by top members, .[.one side member.]. .Iadd.the channel-shaped sections .Iaddend.of each top link .Iadd.being separated by an intermediate decorative section, and each top link .Iaddend.having at least one bendable locking lug protruding .[.therefrom.]. .Iadd.exclusively from one side thereof, each of said decorative sections having at least one recess on the said one side located laterally within said width dimensions, and at least one projection on the side opposite to said one side extending laterally beyond said width dimension .Iaddend.