Abstract: A semiautomatic hand gun which may be fired in a double action manner or a single action manner is disclosed. The gun includes a combined system having single and double action control bars located at opposite sides of the frame.

Abstract: A process for opening folded proof sheets, particularly for their positioning on the conveyor plate of a thread stitching machine, involves moving a stack of the proof sheets along devices which separate the individual sheets until they reach the point where they are all opened. The separating devices comprise blown air suction plates which cause the free outer corner of the adjacent sheet to be drawn up by the suction effect of air jets and thus separated from the rest of the stack. The portion of the sheet which was separated is then guided away from the next blown air suction plate to permit the next proof sheet to be opened.

Abstract: A key operated dead bolt lock includes one or a pair of standard threaded mortise cylinders. The lock further includes set screws, inaccessible from either side of a door in which the lock is installed, which prevent rotation of the cylinders. The cylinders hold cylinder collars in place to prevent access to the bolt from the side.

Abstract: A furnace charging device with a fixed feed channel is positioned in the center of the furnace head. A distribution spout is pivotably supported under the fixed feed channel and has a control rod attached to the spout. A driving means is provided so that the control rod which consist of two telescopic elements may be lengthened or shortened and at the same time may be rotated along with the spout as one assembly around the vertical axis of the furnace.

Abstract: A construction and method of manufacture of a feed belt are presented wherein the belt is an endless body of elastomeric material reinforced with a fabric sleeve and having a toothed inner surface and a non-toothed outer surface, the inner and outer surfaces being treated so that the outer surface has a significantly higher coefficient of friction than the inner surface.

Abstract: The manipulation of components of a fluid transmission system, particularly portions of a conduit through which heated gas is delivered to a blast furnace is facilitated by the use of a self-propelled vehicle having mounted thereon a component support mechanism. The vehicle and component support mechanism cooperate to define a pair of displaced vertical pivotal axes whereby the component support mechanism can be readily maneuvered into engagement with the conduit portion to be manipulated. The apparatus is further characterized by a lifting arm assembly which enables the component support mechanism to be raised and lowered without changing the orientation of a supported conduit portion.The present invention relates to a device for handling the various components of an installation for the injection of pre-heated air into a shaft furnace. The invention likewise relates to a multi-purpose self-propelling carriage equipped with a device of this kind.

Abstract: A control mechanism for raising, swinging and lowering the pick-up arm of a record player comprising a disc having an arcuately shaped depression in the periphery thereof. The contacts of an electrical contact sensor switch are located in the disc peripheral depression and bridging of these contacts will cause generation of a first command signal for the control mechanism. Devices for generating second and possibly third command signals are associated with the disc which may be rotatably mounted.

Abstract: A hydraulic circuit for borehole telemetry apparatus is presented wherein a mud pulse valve is operated by hydraulic pressure applied to differential areas of an actuating piston. The system includes a hydraulic pump, a filter in the line between the pump and the piston to be actuated, an accumulator upstream of the filter, a regulating and relief valve downstream of the filter, and solenoid actuated valves to control delivery of hydraulic fluid to the piston. The system also includes a pressure compensating bellows to compensate for changes in pressure in the drilling mud.

Abstract: A laminated bus bar comprises a pair of elongated flat conductors separated by a layer of insulating material which is provided with longitudinally spaced cut-outs. Capacitors which are comprised of a flat wafer of solid dielectric material are positioned in each of the cut-outs in the layer of insulating material and the capacitor plates are electrically and mechanically connected to the conductors.

Abstract: A mounting assembly and shock absorber are presented for mounting and shock absorption for the transmitter and sensor elements of a mud pulse telemetry system. The shock absorbing apparatus for the mud pulse transmitter is entirely located at one end of the assembly above the transmitter, and the shock absorber apparatus for the sensor package is located at the other end of the assembly below the sensor package, whereby all of the elements can be incorporated in a one piece drill collar.

Abstract: Method for locally galvanizing a ferrous metal article, preferably a strip or a sheet.The article is coated on the surface to be protected from the galvanization by an aqueous suspension of cement and is thereafter dried, heated to a temperature above the melting point of the zinc and moved through a bath of molten zinc. It undergoes finally a cleaning step to remove the masking cement material and possibly a final rinsing.Articles thus obtained may be one side galvanized steel strips to be used in the automobile industry.

Abstract: Radiation shielding concrete is prepared using a lead alloy which will not oxidize in the presence of water. The alloy is incorporated in the cement used to prepare the concrete in powdered and granular forms. A boron containing material may also be added to the cement.

Abstract: A device for thread stitching layers to form a book wherein the stitching apparatus comprises a conveying mechanism for transporting a plurality of open layers in spaced relation to each other, the conveying device transporting the layers with respect to at least one spiral sewing needle which is rotationally driven, the point of the spiral needle penetrating into the layer backs and exiting the layer backs to stitch the layers together in sequence.

Abstract: Textured sheet material is produced by a process which includes two printing steps and two separate applications of plastisol in the form of discontinuous layers. The plastisol layers are applied over respective of the printed patterns and the first layer of plastisol is gelled, but not fused, prior to the second printing step which provides an image thereon. The process enables production of a relief pattern having "valleys" of two different depths.

Abstract: A tactile snap-action element for use in keyboards, the element comprising an arcuately shaped invertible dome defining a first contour and a dome actuating protrusion defining a second contour, the protrusion being integral with the dome and being non-invertible. The element is operated by an actuation force which acts directly or indirectly through the non-inverting protrusion to invert the first contour and to provide tactile feedback. The keyboard includes a plurality of keys, each key comprising an element, a conductive circuit associated with the first contour and moveable with the inversion of the first contour to electrically contact a second conductive circuit associated with the element.

Abstract: An apparatus and process for introducing and distributing a charge within a shaft furnace, the shaft furnace charging apparatus comprising an elongated charge distribution chute, the angle of which being adjustable in relation to the vertical axis of the furnace to allow for distribution of charge to desired areas within the furnace. The charge distribution chute includes a first end for accepting the charge and a second end for distributing the charge within the furnace. The first end of the chute is suspended from a supporting fork which is rotatable about its axis to provide for pivoting of the chute about a first axis when the support fork is rotated. The chute is suspended from the support fork to provide for pivoting of the chute about a second axis which is preferably perpendicular to the first axis. The direction of the chute within the furnace may be adjusted to provide for distribution of the charge to the desired area of the furnace.

Abstract: The non-invasive testing of soft body tissue is accomplished with the use of a beam of ultrasonic energy which may be focused at varying depths in a patient. The energy content of the ultrasound beam is varied as a function of depth of focus to thereby employ the minimum energy required for proper resolution at the chosen examination depth. Signals commensurate with echoes received by a transducer having an array of coaxial annular electrodes thereon are combined in a manner which results in a good signal-to-noise ratio and minimum attenuation thereby improving the quality of the information derived from the examination procedure.

Abstract: Pulverized coal is ignited, to furnish energy for warm-up or low load operation of a coal burning furnace, by a technique which does not require the combustion of significant quantities of liquid or gaseous fuels. The direct ignition of pulverized coal in accordance with the present invention contemplates the delivery of a dense phase coal/air stream to an ignition zone where it receives ignition energy and the thus ignited mixture is thereafter contained in a recirculation region until the flame becomes self-sustaining.

Abstract: A method for disposal of sodium containing waste material comprising combustion sodium containing waste material and a silica bearing material in an incinerator having interior walls lined with a refractory material which tends to react with metallic sodium and deteriorate. The sodium containing waste material comprises sodium salt and/or bases and by providing reaction conditions whereby the metallic sodium tends to react with silica to provide a combustion product including a sodium silicate compound, the combustion is carried out in manner to reduce deterioration of refractory materials by reaction with metallic sodium. Also disclosed is a method for the simultaneous disposal of sodium containing waste material and rice hulls which contain silica and provide a portion of the combustion energy.