Abstract: A vapor phase system for soldering of a workpiece. A vessel for containing an electronic liquid which is heated to generate a zone of saturated vapor. A first inclined throat communicates with the vessel and a solder pot is located within the vessel. The solder pot including a reservoir for containing molten solder, a second throat aligned with the first throat and communicating at one end with molten solder contained in the reservoir means and communicating at the other end with the saturated vapor, molten solder contained in the reservoir means is pumped through the second throat and is captured by the reservoir and a conveyor carries work product through the first throat, through the saturated vapor and into the second throat whereby the work product will become immersed in the molten solder contained within the second throat.

Abstract: A vapor processing system has a vessel for containing a processing vapor into which work product is conveyed for processing. A thermocouple probe generates a signal representative of the actual temperature at one of at least a plurality of spaced locations within the vessel. The probe has a shaft portion and a free end portion defining an angle with the shaft portion and is adapted to be rotatively displaced about the shaft portion to locate the tip of the probe at a selected location around its displacement circle.

Abstract: A system for the continuous production soldering of circuit boards and other products in which the product is heated by an independently controlled vapor phase system, and solder applied by a separately controlled application system operative to direct one or more controlled and defined streams of solder onto the product. A vessel is provided for containing a heated saturated inert vapor into which the product is introduced prior to solder application. One or more nozzles are disposed within the vessel for directing one or more streams of molten solder to the heated product. The heating and soldering operations are separately controllable and are each substantially independent of the control of the other.

Abstract: A system for the continuous production soldering of circuit boards and other products in which the product is heated by an independently controlled vapor phase system, and solder applied by a separately controlled application system operative to direct one or more controlled and defined streams of solder onto the product. A vessel is provided for containing a heated saturated inert vapor into which the product is introduced prior to solder application. One or more nozzles are disposed within the vessel for directing one or more streams of molten solder to the heated product. The heating and soldering operations are separately controllable and are each substantially independent of the control of the other.

Abstract: A solder leveling system for use in vapor phase soldering of printed wiring boards. A transport system operating in a near-horizontal mode moves the board to be solder coated through a vapor zone in a chamber having a solder pot which has a throat in line with the plane of the transport system. The near-horizontal movement through the vapor and into and out of the solder pot prevents solder sag and permits control of the thickness of solder deposited on the opposing board surfaces. Leveling nozzles are positioned in a vapor-filled chamber astride the transport system between the solder pot and the chamber throat. Perpendicular nozzle offset distance from the board and nozzle angle are adjustable. Preferably one nozzle projects a stream normal to the board, with the other nozzle projecting a grazing stream for clearing through holes. A nozzle flow rate corresponding to a predetermined energy threshold provides reliable hole clearing.

Abstract: A motor driven cam and spring impact tool having a buffer spring for absorbing energy when all of the energy cannot be transmitted out of the working tool into the workpiece. A hammer is carried in the housing and reciprocated by an annular cam and roller assembly. A working tool is aligned with the hammer for transmitting energy from the hammer to the workpiece. A tool guide is carried in the housing and has an axial passage for the working tool. The tool guide has an anvil on the end next to the hammer for receiving blows should the upper end of the working tool be within the axial passage. The tool guide is supported in the housing by an annular buffer ring of spring steel. The buffer is arcuate, allowing it to buckle a selected amount to absorb energy.

Abstract: The sensing mechanism of the present invention includes a probe electrically connected to a mine roof bolting apparatus and adapted to be embedded within a mine roof to sense any shifting of the apparatus during an operative cycle. The probe is linked to a 360.degree. rotational toggle switch mechanism which controls an alarm means. The probe is pivotably mounted within the roof bolting apparatus and consequently, any effective movement of the apparatus along any direction within a horizontal plane pivotably displaces the probe and actuates the switch mechanism, energizing the alarm. In this manner, personnel are apprised of conditions warranting corrective measures in order to re-position the bolting apparatus or the apparatus may be automatically halted so as to prevent damage from being imparted thereto.

Abstract: A loading gate for a mine roof bolter apparatus forms a protective canopy for mine working personnel when opened, and when closed, it seals an opening in the bolter containing manual controls and roof bolt storage cartridges. Access to the stored cartridges and controls by the personnel can only be made when the gate is open. The gate is operated by an over-center toggle joint driven by a hydraulic cylinder. As a fail-safe feature, once the gate has been fully opened, the over-center toggle joint maintains the gate open even upon failure of the hydraulic cylinder.

Abstract: A mining machine is provided which incorporates a detachable cab construction. The mining machine includes a clamping mechanism including a pair of a clamping hook assemblies for releasably clamping the cab body, and a lift cylinder for raising and lowering the cab body. In operation, the cab is detached from the mining machine in a safe area and the mining machine trammed into a mining position. The cab is equipped with remote controls so that operation of the mining machine can be controlled from the cab while the latter is located in a safe area. A safety interlock system prevents operation of local machine-mounted controls until the cab is re-mounted on the mining machine.

Abstract: A motor driven cam and spring impact tool with an improved mounting for the cam. The impact tool includes a driving shaft for rotation relative to the housing. A hammer is positioned in the housing for axial movement with respect to the housing. An annular cam with cam rollers translates the rotational motion of the driving shaft to reciprocating motion of the hammer. A spring urges the hammer in one direction to cause an impact upon each reciprocation. A collar, driven by the shaft, is connected to the cam or selectively to the rollers for rotating one with respect to the other. The non rotating member is attached to the hammer to cause reciprocation. A pair of pins are connected between the cam and selectively the collar or hammer, and spaced apart 180.degree. to allow the cam to tip about the axes of the pins. This equalizes the load imposed by the rollers upon the cam.