Abstract: The structure is composed of a plurality of feet, each consisting of a section of square tubing which has at the base height adjustment means connected to a ground rest plate. Each foot bears on its top four crosspieces obtained by pressing from a sheet metal; the head of the crosspieces is shaped to cover an area of one fourth of the section of the foot tubing. The head edges are turned over to form hooking means for connection to the foot, while screw means are provided for achieving engagement among the crosspieces converging on a same foot and the foot itself. Each cross-piece is again covered by a U-like moulding of plastics which forms the rest plane for modular panels.

Abstract: Stair apparatus and method of manufacture, wherein the stair apparatus has concrete tread pads and landings which are poured and set during manufacture so that pouring and setting of the concrete does not have to be done in the field, thereby saving much labor and time. The method includes a unique step of clamping the step elements between the stringer elements so that the step elements are firmly held in proper position during welding thereof to the stringer elements. The landings are supported in a novel manner in a stairwell, and the stair assemblies are supported between the landings.

Abstract: A sealed double glazing unit includes a mounting system, disposed in at least one corner of the inner and outer panes, for mounting of the unit to a supporting member. The mounting system includes a torus extending between the panes coaxially with the pane apertures in the corner and having the end surfaces thereof secured to facing surfaces of the panes about the pane apertures, a sleeve extending through the hole of the torus and having its end portions disposed at least partially within respective ones of the pane apertures, and sealant securing the outer surface of the sleeve to the inner surface of the torus and preferably the pane apertures as well. A method of making the unit is also disclosed.

Abstract: The expansion joint for the runner is formed with two cut-out areas and cuts in the vertical web to permit the horizontal web, enlarged bulb and remaining web by the cut-out areas to bend outward to absorb expansion of the runner when subjected to fire.

Abstract: The invention discloses a building element and system useful in the construction of silos and other compartmentalized structures; the system comprising a first upright elongated plate 1 having a flange 3 along each of two longitudinal edges at approximately 45 degrees from the plate, the included angle between the flanges being approximately ninety degrees; wall panels 4 having a flange adjacent each of two opposing parallel edges adapted to be sandwiched between one flange of a first upstanding elongated plate and an opposing flat surface on a second upright elongated plate; two or more upstanding plates serving to define a column support.

Abstract: A wall system includes a plurality of wall sections secured to one another or to fixed building structure through a peripheral framework of profile elements each having a web bounded by pairs of large and small flanges respectively defining deep and shallow grooves. The shallow grooves serve to engage and retain the edges of panels which are held against the large flanges while rigid splines are insertable within opposed deep grooves of adjacent profile element-equipped panels to interlock the plurality of wall sections. By employing various width splines, alternate spacing between wall sections is achievable and various supplemental members such as shelf brackets or trim elements may be installed over the exposed portions of the splines.

Abstract: A cyclorama utilizing floor and ceiling coves of concavo-convex shape having side flanges receiving fasteners for assembly of the coves along a studio floor and ceiling. Recessed side marginal areas of the coves receive cementious material to provide an uninterrupted surface which conceals the joint area between abutting coves. The floor cove includes a lower edge of increased thickness to accommodate a fillet. Floor and ceiling corner coves are each curved along two axes for installation at the intersection of cyclorama wall components. The corner coves include converging side flanges for attachment to the side flanges of the floor and ceiling coves.

Abstract: A covering for an expansion joint is formed of a plurality of monolithic steel elements that are arranged to be self-cleaning and so as not to be subject to binding. The joint has an overall T-shape and is bilaterally symmetric. The joint includes two L-shaped portions each attached to a structural element for movement therewith. The joint cover has a steel plate on one leg of each L-shaped portion bordering the expansion gap. A spacer plate is also fixed to the leg of the L-shaped portion and forms a sealant-receiving channel with the leg and the plate. An expansion gap spanner plate slidably rests on top of the plate and a cover plate is fixed at one end to the spacer plate and slidingly engages the spanner plate to keep it in the desired position and orientation during movement of the joint.

Abstract: In a removable bridge profile for floor joints of parquet floors with different vertical position of the joint edges, consisting of an L-shaped base profile with a threaded drive channel projecting into the joint, at least one covering wing adjoining a center portion covering the joint and drive or Parker or sheet metal screws, at the lower side of the center portion two webs engaging over the upright portion of the threaded drive channel are attached.

Abstract: A watertight fastener for mounting a peripherally grooved prefabricated bathtub surround panel on a wall. The fastener includes a rigid support and a resilient seal. The support has a mounting portion adapted to be secured to the wall, and a surround-receiving portion adapted to enter the peripheral groove of the surround panel and defining adjacent the free end thereof an aperture extending at least partially therethrough. The seal has an elongate body portion and a sealing portion. The body portion is adopted to enter the peripheral groove of the surround panel with the surround-receiving portion, has a serrated front surface, and defines a transversely-extending plug resiliently retained by the aperture. The sealing portion is adapted to extend intermediate the surround and an adjacent surface to form a watertight seal therebetween.

Abstract: The disclosure describes an apparatus for laying tiles or the like on a surface. The apparatus holds the tile over a surface portion which is covered with an adhesive material and on which the tile is intended to be laid, and allows it to contact the adhesive. A vibration is produced so that when the tile is in contact with the surface portion covered with the adhesive material, it becomes embedded therein thereby being fixed on the surface portion. Thereafter, the tile is released. The apparatus advantageously replaces the common practice of laying tiles by hand.

Abstract: A container is provided in the form of a cup-like container body with a round mouth closed by a lid which becomes removably replaceable upon tearing away of a circumferentially extending tear strip which initially surrounds the mouth rim of the container body as a radially outer, integral part of the lid flange. As the lid is differential pressure-thermoformed, its radially outer region is formed into a generally inverted U-shaped structure which near the juncture of the base and radially outer leg of the inverted U, is provided, within the channel, with an inverted V-shaped notch of substantially diminished wall thickness to provide a line of weakness which preferably extends nearly fully around the circumference of the lid, but for at an angularly short tear-starting site.

Abstract: Successive bags of material which are interconnected in a continuous web along the tops thereof by an integral tubular portion of the web, and which are individually open to the tubular portion but sealed from each other by seams extending along the adjacent sides thereof, are filled by an elongated filling pipe along which a tubular portion of the web is drawn. The underside of the pipe is provided with two spaced ports through which material is delivered into the successive bags, and in order to prevent material from accumulating above the adjacent seam portions of contiguous bags, these ports are alternately opened and closed in such timed relation with the feeding movement of the bags that each port is open when only one bag is passing thereunder and is closed when one of the seams is thereunder.

Abstract: A three sided envelope opening and extraction apparatus and method are disclosed. The envelopes pass from a supply hopper to three envelope slicing devices which open three sides of the envelope and thereafter, the envelopes are disposed into a transport system for conveyance to the opening apparatus with the unopened edge positioned generally downwardly. The opening apparatus includes opposed elongate folder blades which close upon the side panels of the envelope approximately one third of the distance above the unopened edge thereof to clamp the envelope therebetween. An opposed pair of elongate grasping members including suction cups engage the opposed panels of the envelope above the folder blades and pull the opposed panels downwardly and tautly against the folder blades to provide a deformed and permanent crease in the envelope panels along the folder blade edges whereupon the folder blades and grasping members release the envelope panels and are withdrawn away from the envelope panels.

Abstract: A marker supported in the ground allows a reel-type grass mower to cut grass around the marker without requiring the removal of the marker. The marker has a flexible elastomeric element coupled between a substantially rigid shaft and a substantially rigid stake and for urging the shaft into axial alignment with the stake and for allowing a reel-type grass mower to bend the rigid shaft over at the elastomeric element to a position with a sign member substantially flat with the ground.

Abstract: A mowing machine having a cutting path laterally positionable with respect to the path on which the mowing machine travels. A cutting deck is suspended beneath a tractor or other vehicle, on lateral tracks permitting a range of lateral movement across the longitudinal centerline of the tractor. Displacing the cutting deck from the normal position centered on the centerline displaces the cutting path to one side of the tractor, permitting mowing beneath obstacles or along other areas inaccessible to the mowing machine.

Abstract: A safety blade for rotary grass trimmers for cutting grass and weeds while avoiding the hazards of blade thrusting and of any loose debris being thrown by the spinning blade. The blade has a plurality of cutting vanes each with a rounded outside radial edge of varying radius which serves as a bumper as the blade spins. Each vane has upwardly beveled cutting edges which along with the rounded outside radial edge serves to nudge away, rather than lift and throw, any loose debris encountered by the spinning blade.

Abstract: A retaining sling for fruit tree shaker pads is provided with circularly channels within or between the exterior walls of the sling. The sling also has input and output ports which communicate with fluid circulating channels to course liquid throughout the sling for cooling purposes. The liquid movement can be accomplished through gravitational, convectional, or mechanical pump means. The liquid can be cooled by a radiator, by coils in an ice chest, or by refrigeration.

Abstract: A variable force tree shaker is disclosed including a rotatable housing supporting a weight fixed to the housing and a movable weight, with the movable weight being capable of being moved between a balanced position and a plurality of unbalanced positions while the housing is rotating at a shaking speed. Hydraulic fluid is controllably directed into the housing between the fixed and movable weights to move the movable weight while the housing is rotating.

Abstract: A belt type spindle drive apparatus for textile machines of the type having a plurality of simultaneously driven aligned spindles arranged in at least one row. An endless belt extends in driving engagement along the spindles and is driven by a plurality of belt driving devices. In one embodiment, the belt driving devices have drive rollers offset from the spindle rows and coaxial overlapping input and output rollers that guide the belt to and from the drive roller between adjacent spindles. The paths of the belt entering and leaving the drive devices are offset. When an uneven number of devices is used, a pair of canted auxiliary rollers are used to make the number of belt path offsets even. To accommodate the offset of the guide rollers, one or the other guide rollers can be canted toward the drive roller or the drive roller can be canted. Alternatively, adjacent drive devices can have the same offset relationship and the belt path can be inclined from one drive device to the other.

Abstract: To piece with a spinning device having a pneumatic twisting unit, a yarn end is back-fed from an output side, through the twisting unit, to drawing equipment, and then inserted laterally into a pair of drawing unit output rollers, from where it is drawn off through the twisting unit in the form of a continuous yarn with a rove being incorporated into it. During the back-feeding of the yarn end to the twisting unit input side, the yarn end is conveyed to a grasping device located at the side of the drawing equipment. The grasping device pulls the yarn end for subsequent insertion into the pair of output rollers past such rollers until such end is alongside the drawing equipment. A yarn presenting device is provided to convey to the grasping device the yarn end leaving the twisting unit input side.

Abstract: In an open-end spinning device with a spinning rotor a compressed air conduit is provided for directing an air current upon the inner surface of the spinning rotor. This compressed air conduit is connected through a stop valve to a source of compressed air. The compressed air conduit is provided with a pressure control device which can be pre-set to at least two pressure levels. The pressure control device has parallel conduits of which one conduit is provided with a pressure reduction device for the low pressure.During the preparation of the piecing operation, compressed air, at high pressure, is fed into the spinning rotor to clean said spinning rotor. Subsequently, but before the start of fiber feeding into the spinning rotor, the compressed air is reduced to a lower pressure value and is finally switched off before the yarn is fed back into the spinning rotor.The invention includes the process for restarting the open-end spinning device.

Abstract: A prickle chain wherein each link has two side portions which are joined at one end by a curved bridge portion, the side portions terminating in respective outwardly projecting ends which cross each other and extend in opposite directions, the projections being the "prickles" of the chain. Each link is formed by engaging opposite ends of a straight rod in respective brackets which are pivoted by hydraulic piston/cylinder assemblies firstly to form the rod to a "U" shape, and then cause the ends to cross each other and project outwardly in opposite directions.

Abstract: An offset sidebar chain for use in a machine including pairs of offset sidebars having heights perpendicular to the direction of chain travel, when the chain is in use, at least one pair of offset sidebars of the chain having an extended height, and each including a first portion having opposite ends, a forward end adapted to be connected by a chain pin to a preceding pair of sidebars, and a rearward end adapted to be connected by another chain pin to a trailing pair of sidebars and the pair of extended height sidebars including an extended height portion having structure for supporting a tool.

Abstract: A method for operating a palladium oxide containing catalytic combustor useful, e.g., for powering a gas turbine. The method involves maintaining control of the temperature within the combustor in such a manner as to insure the presence of palladium oxide. By maintaining the temperature below about 800.degree. C. decomposition of palladium oxide into metallic palladium is avoided and high catalytic activity is retained. Regeneration of catalyst following inactivation resulting from an over-temperature is accomplished by using a heat soak in the temperature range of about 530.degree. C.-650.degree. C.

Abstract: The invention relates to a method of operating a gas turbine unit comprising a combustion chamber, a high pressure turbine driven by gas from the combustion chamber, and a low pressure turbine driven by gas from the high pressure turbine, means for controlling the gas supply from the high pressure turbine to the low pressure turbine, and a low pressure compressor driven by the low pressure turbine, and a high pressure compressor connected in series with the low pressure compressor and driven by the high pressure turbine for supplying pressurized air to the combustion chamber, the useful power of the gas turbine unit being adjustable by controlling the gas condition upstream of the low pressure turbine by the control means. Substantially all the air delivered to the combustion chamber from the compressors, is utilized for the combustion in the combustion chamber.

Abstract: A steam injection system for use in a gas turbine engine having a turbine coupled to an air compressor for providing air to the turbine combustor. Steam generated by a boiler or the like is treated by removing moisture and particulates from the steam supply and steam is then injected by a line into the combustion chamber. A control unit is arranged to sequence a series of valves so as to purge the line each time an injection cycle is started or ended. The valves can also be sequenced during an emergency shut down to prevent steam from flowing back through the compressor.

Abstract: Method and apparatus for controlling the output emissions of a gas turbine engine provides an emissions combustor wherein the gas is burned locally and then thoroughly mixed with cooler unburned portions while propagating the resulting a very hot flame front is propagated over the whole gas stream flow. The emissions combustor serves to reduce the carbon monoxide content of the output. NOX can be eliminated by steam injection into the engine main combustor in combination with the emissions combustor. Combustion efficiency, which is reduced through the steam injection in the main combustor is recovered through the use of the emissions combustor. The emissions combustor can be placed at numerous locations, either as part of a main combustor staging, downstream of a high pressure turbine, or in a supplementary burner after a power turbine.

Abstract: An engine utilizes a powdered biomass fuel that is ignited to heat water which is spray injected into a turbine section. The heated water converts into steam turning the turbine blades through its expansion. A combustion chamber is separate from a steam expansion chamber with heat being directed through communicating passageways.

Abstract: A technique for producing thrust by generating a hybrid plume plasma exhaust is disclosed. A plasma flow is generated and introduced into a nozzle which features one or more inlets positioned to direct a flow of neutral gas about the interior of the nozzle. When such a neutral gas flow is combined with the plasma flow within the nozzle, a hybrid plume is constructed including a flow of hot plasma along the center of the nozzle surrounded by a generally annular flow of neutral gas, with an annular transition region between the pure plasma and the neutral gas. The temperature of the outer gas layer is below that of the pure plasma and generally separates the pure plasma from the interior surfaces of the nozzle. The neutral gas flow both insulates the nozzle walls from the high temperatures of the plasma flow and adds to the mass flow rate of the hybrid exhaust. The rate of flow of neutral gas into the interior of the nozzle may be selectively adjusted to control the thrust and specific impulse of the device.

Abstract: An inlet air demoisturizing system utilizes a plurality of screens between the inlet of a cryogenic engine and a heat exchanger therefor. In a first embodiment, a curtain of liquid air flows on the forward side of the screen to pre-cool the gaseous intake air below the freezing point of water. In a second embodiment, a mist of liquid air is used to pre-cool the air prior to arrival at the screen. The screen traps ice crystals precipitated from the air. In each embodiment, a second sprayer washes the screen with a curtain of liquid water to remove the ice crystals therefrom. Collector troughs collect the liquid air and suspended ice crystals for removal from the engine inlet.

Abstract: A hydraulic master cylinder assembly of the type including a reservoir in which a diaphragm is disposed to divide the reservoir chamber into a hydraulic fluid chamber outside of the diaphragm and in communication with the pressure chamber of the master cylinder and a gas chamber within the diaphragm. The diaphragm is generally tubular with an open end and a closed end, and in a cross section transverse to the central axis of the diaphragm, includes a plurality of radially extending arms arranged about the central axis of the diaphragm and each including a pair of side walls defining therebetween a portion of the volume of the gas chamber. The diaphragm is movable between an expanded condition in which it assumes a substantially circular configuration in cross section and a collapsed condition in which each of the pairs of side walls of the arms are collapsed with respect to each other to reduce the volume of the chamber.

Abstract: A fabricated master cylinder having a reservoir part and in interlocked cylinder part defining a cylinder bore and which a slidable piston is supported. The reservoir part that extends into the cylinder bore defines a shoulder that cooperates with a recuperation valve for forming an actuating stop for holding the makeup fluid recuperation valve in an opened position when the piston is at its at rest position.

Abstract: An exhaust gas driven turbocharger is provided with a single pneumatic actuator which controls both a pivoting vane which varies the flow area or aspect ratio of the exhaust gas inlet passage to the turbine, and also controls the wastegate valve. A linkage mechanism including a preloaded spring and a bellcrank lever actuates levers controlling the wastegate valve and the pivoting vane.

Abstract: Combustion apparatus for a gas turbine engine comprises a burner which is so configured and located within a combustion chamber so as to urge fuel and air mixture ejected therefrom into a fuel rich toroidal vortex in an upstream first combustion zone of the combustion chamber. Unburnt fuel from the first combustion zone is mixed with additional air in a second fuel weak combustion zone downstream of the first zone. Adjustment of the air to fuel ratios in the two combustion zones results in the reduction of smoke and oxides of nitrogen reduction.

Abstract: The invention relates to a three function heat pump system which provides space heating, space cooling and hot water production. The system permits hot water production all year long without operation of the system in the heating or cooling modes. The system also provides a check valve arrangement which allows passage of a refrigerant through the receiver in all three modes without reversing the flow of the refrigerant through the receiver. The valving arrangement also prevents migration of the refrigerant from the liquid receiver to a thermal storage tank during the hot water production mode. In addition, the valve arrangement allows the refrigerant to pass through throttle or expansion valves when the liquid is passing from the liquid receiver to the thermal storage tank and outdoor air coil, while bypassing the expansion valves when the refrigerant passes from the outdoor air coil and the thermal storage tank to the liquid receiver inlet.

Abstract: A foodstuffs thawing detector device (1) comprised of a water-filled container (2) in which detection or marker means (5, 8 or 10) is maintained in a stable position by the freezing of the water in the said container (2), where the said detection means will reach a position other than the said stable position when the water in the container melts. A preferred embodiment consists in a container (2) having an interior cavity defined by frusto-pyramidal formations (3) oriented in opposed directions and joined at their smaller bases in line with a central transverse plane (4); preferably, the said formations shall have a square base, and even a truncated arrangement (6) or the like, and detection means comprised of a ball member (5 or 8) having a high specific weight, maintained on the said central transverse plane (4) by the freezing of the water.

Abstract: A refrigeration appliance includes a plurality of side panels and a base panel, one of the side panels containing within the inner and outer walls thereof a complete mechanical refrigeration unit. The side panels and the base panel are provided with integral interlocking means in the edges thereof so that the panels may be manufactured at one location and shipped in knockdown form to another location where the side panels may be readily assembled on the base panel by unskilled personnel without the use of tools or separate fastening means by simple engagement of the interlocking means in the panel edges. A lid or closure panel may then be secured to one of the side panels to provide a completely enclosed refrigerated compartment.

Abstract: A compressor drive system that includes a thermostat producing a signal indicating the measured air temperature, a modulation control circuit connected to the thermostat to produce a motor drive signal from the temperature signal and which is output to a motor drive switching bridge circuit. The motor drive switching bridge circuit is connected to a rectifier that converts single phase alternating current to direct current. The switching bridge uses the motor drive signal from the modulation control circuit and the rectifier output to produce multiphase power including a speed control signal imposed on the power for regulating speed. A motor connected to drive a compressor is included. The motor is powered by the motor drive switching bridge circuit multiphase power output. The speed of the motor is controlled as a function of the temperature signal.

Abstract: A refrigeration cycle or an air conditioner including a refrigeration cycle is subjected to feedback control based on modern control theory. An apparatus controlling a controlled object, that is, the refrigeration cycle of the air conditioner including the refrigeration cycle, is formed as an optimal regulator. A controlled input to the controlled object includes a capacity of a compressor or a degree of opening of an expansion valve. A control output from the controlled object includes a temperature of air at a point downstream of the evaporator or a superheat of refrigerant. Feedback gains are predetermined by use of dynamic models constructed for respective steady operation states of the controlled object.

Abstract: A convector tray including a one-piece, homogeneous in situ molded tray body of polymeric/copolymeric material, the tray body including a bottom wall and a peripheral edge defining a condensation chamber which opens upwardly when the convector tray is installed in generally surrounding relationship to a pipe conducting a heat exchange medium thereto for like condensate creating elements, a bottom wall including an upper and outer lower surfaces, a wall projecting above said inner upper surface and having an end remote therefrom closed by a removable wall portion which when removed defines an opening, a discharge spout for discharging condensate deposited/collected in the tray body, and the material of the tray body being constructed and arranged from material having a strength and thickness to permit severance along and through the peripheral edge and into the opening to thereby create an access slot through which a heat exchange medium conducting pipe is adapted to pass for insertion into the opening.

Abstract: Warp knit fabrics, especially sewn-knitted fabrics, are produced by a method and apparatus whch results in single and multiple layer sloping fabrics having oblique and diagonal endless filling threads with respect to the boundary of the fabrics. Spaced-apart chain conveyors transport a plurality of filling-thread sections, each of which contains a plurality of endless filling threads, to a stitch-forming site. The plurality of filling-thread sections are held between and transported by the conveyors by a plurality of hooks in the conveyors. Filling thread sections are laid onto the hooks by at least one filling laying device having a guide means for laying the filling thread sections onto the hooks.

Abstract: In a heat treatment apparatus for bobbins of yarn having a plurality of heat treatment baths arranged between a spinning machine and a winding machine, the bobbins from the spinning machine are carried into the heat treatment baths by a conveyor line with pegs, the heat treatment is performed in the baths with the bobbins mounted on the pegs, and the heat-treated bobbins are automatically delivered from the baths onto another conveyor line with pegs installed on the winding machine side.

Abstract: By using a relay of which contact is opened or closed in response to a signal from instruction and control unit, an electric power is supplied to a load unit through the contact of the relay. The relay is such that a power switch is turned on to excite a coil for closing the contact thereof. When a reserved operation is performed, the relay is turned off in response to the signal from the instruction and control unit at the time at which a reserved time and the contents of the reserved operation have been set. When the time to start the reserved operation comes, the relay is turned on again in response to the signal from the instruction and control unit to start a supply of electric power to the load unit. Power is not applied to the load unit during the waiting period until the reserved operation starts. Thus, the malfunction of the load unit due to the deterioration of the semiconductor switching elements is prevented, and a safer washing machine can be obtained.

Abstract: A process and an apparatus for the continuous and controlled application of liquor on an absorptive, compressible material web such as textile webs, warp yarn layers or vleeces. One or more liquors are applied in amounts being comprised between the values of water retention capacity and saturation. The liquor containing web is passed through an equalizing device wherein the web is drawn through an equalizing nip or slit whose thickness is adjustable and smaller than the thickness of the incoming, liquor containing material web. The equalizing may be effected in the nip of two rollers. The liquor concentration in the web before and after the equalizing is statistically the same.

Abstract: A flow-intensifier for use in an upright automatic clothes washing machine includes a weight disposed intermediate the washer agitator and the washer drum, non-extendible elongate connectors operatively connected at one end to the agitator for movement therewith and at the other end to the weight for movement therewith, and a redirecting guide traversed by the connector and operatively connected to the drum for movement therewith so that reciprocal relative rotation of the agitator and the drum causes a corresponding reciprocal vertical movement of the weight.

Abstract: A locking device for an outboard motor which both seals the turnbolts securing the motor to a boat transom to prevent removal of the motor and which inhibits trimming of the motor from an inoperative position to prevent the motor from being used to facilitate theft of the boat. For a preferred embodiment, a hollow tube of a hard, noncorrodible material such as hardened stainless steel is fitted over the turnbolt heads, a cylindrical lock is fitted in the open end of the tube to prevent removal thereof and a cable, preferable an armored cable is fixed to the tube near the closed end thereof and is adapted to fit around the motor to prevent trimming of the motor with the free end thereof passing through aligned openings in the tube and lock near the open end of the tube so that, when the lock is operated, it engages the cable to prevent removal of the lock from the tube and to secure the cable.

Abstract: A locking mechanism for a modular communication socket in which device with locking mechanism is inserted into socket, and a sliding bolt is positioned posterior to retention shoulder of socket preventing the removal of device from socket, and therefore making socket unusable while device remains in socket, said device also allowing for the unlocking and removal of device from socket so that the communication socket may again be used.

Abstract: An improved bending machine with three rollers which may be driven at different speeds and/or with differing torques. A control system receives signals indicative of the position and speed of rotation of one or more of the rollers. The control system is connected to a mechanism for adjusting the position, rotational speed and torque of at least one roller so that commands can be given to vary these parameters. Thus, the machine can be readily and accurately adjusted to produce bends of differing dimension in a strip workpiece.

Abstract: The hammering is carried out by a device having a tubular outer housing (5) which is placed against a face of the tube plate around a flush end of the tube to be hammered. A tool comprising a nozzle for projecting particles is mounted for axial movement in the outer housing (5). The control device has at least one piezoelectric sensor (20) in contact with the wall of the outer housing (5) and apparatus for measuring (23, 24) the electrical signal generated in the sensor (20). The nozzle for projecting particles is introduced into the outer housing (5) at the height of the sensors (20) after each tube hammering operation. The electrical voltage of the signals produced by the sensors is measured.