Abstract: A lamp assembly is disclosed as adapted for use as a supplemental high mounted stop lamp for motor vehicles. A lamp body has a paraboloidal reflector for producing parallel rays of light from a source mounted therein. For reducing the axial dimension of the lamp body to a minimum, a generally planar lens is mounted at its open front end, with the lens having a multiplicity of prism elements formed on its outer surface for internally reflecting the parallel rays in a direction at a considerable angle to the axis of the reflector. Additional embodiments are disclosed for imparting both lateral and vertical divergence to the light beam emitted, and for producing two vertically overlapping light beams.

Abstract: A combustion safety device for the counter-action against oxygen deficiency in a gas heater which is provided with a main burner of the surface combustion type and with an oxygen-deficiency detecting burner of a Bunsen type, in which a primary-air hole of the oxygen deficiency detecting burner is made to communicate with the primary-air supply chamber or distributing chamber of the main burner.

Abstract: The invention provides an adjustable wagon for supporting a range of sizes of barbeques, the wagon includes a base and first and second end structures for attachment to the base at selected locations to extend upwardly in parallel from the base. The end structures can be spaced selected distances from one another according to the size of barbeque to be supported, and they include supports for receiving the barbeque between the end structures so that the barbeque becomes a structural element of the total assembly.

Abstract: A housing supporting a signal-controlled, power operating unit for a damper is mounted internally within a duct by a tubular supporting sleeve in an angularly and axially adjusted position projecting from an open end of the duct. A shield fixed to the external end of the sleeve backs an annular sealing flange engaged by the damper element, which is enclosed by a flow deflecting hood slidably assembled on the shield.

Abstract: A tester can determine a metabolic characteristic of a microorganism suspended in a medium. The tester has a reagent supply, a probe, a dispenser and a controller. The reagent supply contains a quantity of at least one test reagent. The probe is sized to be inserted into the medium and for providing a reaction signal signifying the temperature of a fluid at the probe means. The dispenser is coupled between the reagent supply and the probe for delivering at the latter from the former a controllable amount of test reagent. The controller is coupled to the probe and to the dispenser for controlling the amount of test reagent dispensed by the dispenser and recording the variation of the reaction signal after delivery of the test reagent.

Abstract: A magnetic separation device suitable for removing magnetic bead-coated cells from a system comprising a base, a plurality of magnets mounted on the base such that a sample chamber is created for holding sample containers which are to be placed in close proximity to the magnets, and a means for adjusting the position of the magnets with respect to the sample container. A blood sample containing magnetic bead-coated cells is passed through tubing which is mounted in close proximity to the magnets. The magnetic bead-coated cells are attracted by the magnets and retained in the tubing while the nonmagnetic cells pass through the tubing.

Abstract: Disclosed is a heating system having a combustion air blower, a fuel valve for providing fuel to a burner, and an exhaust stack for exhausting combustion products. Also disclosed is flow sensor apparatus operatively associated with the stack for providing control signals to a furnace control, the control signals being related to flow conditions in the stack.

Abstract: A heating appliance which burns solid fuel has a bottom feed to a furnace vessel, conveniently by means of an auger. The furnace vessel is arranged to be driven in rotation which assists keeping a uniformly distributed fire in the furnace vessel, and makes possible the discharge of ash overflowing from the top of the vessel through an airlock system. Preferably, a water jacket surrounds the furnace vessel and a poker is moved in the furnace vessel as it rotates. Combustion air can be blown or sucked in by a fan. The heating appliance can be a domestic cooker, also heating water for central heating.

Abstract: A device for disengaging the friction clutch of a motor vehicle wherein a sleeve is movable along a tubular guide under the action of two arms of an actuating fork and wherein the sleeve has two platforms disposed diametrically opposite each other and serving to receive motion from the respective arms so that a bearing on the sleeve can engage the prongs of the diaphragm spring in the clutch. The sleeve is formed with an internal surface an annular section of which flares toward one axial end of the sleeve so as to allow the sleeve to rock in a plane including the axis of the sleeve and halving the platforms.

Abstract: Folding camp stove/oven apparatus includes a first housing portion, a second housing portion, a leg portion and leg retaining portion. The first housing portion includes a quadrangular bottom section and two pivotally connected sidewall sections extending upwardly from opposite bottom section with an intermediate divider section edges. The second housing portion includes a quadrangular top section and two pivotally connected endwall sections extending downwardly from opposite edges of the top section with U-shaped sections extending therefrom. Single flange sections that extend frome edges of the top section bear against the endwall sections. A smoke pipe opening is located in the top section. First and second openings with cover members are located in two of the sidewall or endwall sections. The leg portion includes a pair of leg assemblies, each including two right angle leg members spaced to engage adjacent lower corners of the apparatus with spaced parallel connector members joining same.

Abstract: The apparatus for continuously monitoring the microbial growth in oilfield water systems comprises a pipe (1) which is made of transparent material and which is sealed at both ends with screw-on caps (2) and is provided in each case with an inlet and outlet line (3, 4), and a plurality of steel sleeves which are held within the pipe at its upper edge by a bar (5) in the longitudinal direction of the pipe and at its lower edge by a rail with a U-shaped cross-section (6), the lower U-shaped rail being provided with recesses for receiving the steel sleeves and the upper bar being kept at a distance from the lower U-shaped rail by bolts (7).

Abstract: An improved solar apparatus for heating above 100.degree. C. is disclosed. Said apparatus comprises a solar collector means for heating a heat transferring gas, ducting means extending from said solar collector means for permitting moving of said gas past a heat storage medium whereby heat in said gas will be transferred to said heat storage medium by directly contacting said heat storage medium, flow control means provided in said ducting whereby to permit said gas to flow to said heat storage medium when said solar collector means is radiated by the sun, and to permit said gas to pass through said heat storage medium for recovery of heat therefrom when said solar collector means is not radiated by the sun.

Abstract: The braking and steering brake system of the present invention comprises two master cylinders, operable singly or jointly via brake pedals, with the master cylinders having a primary and a secondary piston each operating in a bore. The primary pressure chambers formed by the pistons are connected to the rear wheel brakes of a vehicle. The secondary pressure chambers are interconnected via a pressure fluid line in any state of operation. The primary pressure chambers via a valve arrangement and pressure medium line are interconnected in both the release position and in the braking position. The brakes of the non-steering-braked front axle are connected to the pressure fluid line. In a steering brake position, through a compression spring, one of the two valve arrangements closes so that only the steered-braked brake is supplied with pressure medium.

Abstract: A driving control device in a crawler type tractor comprises a lever capable of being operated in the forward or reverse (backward) direction and capable of being operated in the right or left direction when the lever is operated so as to move to the end of the forward or reverse direction, and a speed-stage command device capable of generating and transmitting commands for speed stages for the forward and the reverse directions. When a first sensor detects the lever operation in the forward or reverse direction; the transmission speed stages can be selected in accordance with the first sensor output and the output of the speedstage command device, and the operation amount of the lever in the right or left direction is detected by a second sensor so that steering clutches of the tractor can be controlled in accordance with the output of the second sensor.

Abstract: The invention relates to a process and an apparatus for the simultaneous application of a multiplicity of liquid samples to an object stage (2), more especially of sera to an object stage overgrown with cell cultures. In this connection, according to the invention the liquid samples are pressed with the aid of a multipipette (3) through a funnel plate (4), which rests immovably on the object stage (2) and which has a multiplicity of funnel-shaped containers (5) disposed side by side in a plane. The funnel plate (4) is then preferably left on the object stage (2) overgrown with cell cultures, until such time as incubation of the applied serum has taken place. By means of the process according to the invention, running of the sera is avoided and handling in a simple and reliable manner for the purposes of the laboratory investigation is guaranteed.

Abstract: The pressure responsive, pilot actuated, modulating valve comprises a main valve assembly which defines with the housing a first chamber and controls flow of fluid from an inlet port to an outlet port. A pressure responsive piston is provided which defines with the housing a second chamber. A vent passageway is provided in the piston for communicating the second chamber with the outlet port. A pilot valve assembly is provided to control flow through the vent passageway. A means is provided for selectively actuating the pilot valve assembly. A discharge orifice is comprised in the main valve assembly for communicating the vent passageway with the outlet port. A vent valve assembly is disposed to control flow of fluid between the first chamber and the discharge orifice.

Abstract: The solenoid valve actuates a pilot valve body which cooperates with a stationary seat surface. The pilot valve body actuates a main valve body of an on-off valve having a piston with a calibrated leakage. The cylindrical chamber on one side of the piston communicates with the inflow side of the on-off valve when the solenoid valve is opened via the pilot valve body, and the cylinder chamber on the other side of the piston communicates directly with a discharge. That side of the piston which is near the main valve body is isolated from the flow path of the on-off valve. The possibility of leakage is reduced considerably for a very reduced constructional outlay, electricity consumption is low and the loss of valve-time cross-section associated with an opening instruction is reduced.

Abstract: A camp stove including a metallic framework defining a primary fire chamber straddled by first and second auxiliary fire chambers; a metallic grate supported by the framework above the primary fire chamber; a first metallic grill supported by the framework and slidable thereon between one position above the first auxiliary fire chamber and another position over and directly adjacent to the grate; and a second metallic grill supported by the framework above the second auxiliary fire chamber.

Abstract: A trip throttle valve with a manual exerciser and combination of a hydraulic piston and a biasing force bearing sleeve is provided in place of a piston. The piston is not directly connected to a valve stem and the sleeve is threadably engaged with the valve stem so as to cause relative axial movement between the sleeve and the valve stem when the stem is rotated through the manual exerciser. The hydraulic portion of the valve is provided with a by-pass passage so that the piston is made axially movable toward the sleeve under the pressure which occurs when the by-pass passage for the hydraulic liquid is blocked but the piston is arrested at a certain axial position where the by-pass passage is still blocked and the axial movement of the sleeve is restricted against the piston.

Abstract: A miniaturized multilamp photoflash array includes a printed circuit board with a common circuit extending along one edge and a plurality of contact pads along an opposite edge and a plurality of flashlamps mounted in a direction normal to the edges of the circuit board.