Abstract: A power unit combining a generator and a condenser for an adsorption heat exchange system including apparatus comprising a plurality of coaxially substantially vertical chambers in which desorption and condensation take place simultaneously in opposite walls of the chamber. Means may be provided to convey the refrigerant solution pair from one chamber to the next.

Abstract: A finger ring comprises first and second separate ring members, each of which has a hole into which the finger can be inserted, and is composed of a central inscribed circular main hole region whose diameter is substantially equal to the smaller diameter of the joint of the finger to be inserted into the ring member and a pair of segmental supplementary hole region extending from said central circular main hole region, and a pair of permanent magnets for connecting the first and second ring members fitted around the finger so that their relative movement along the finger is prevented when the first ring member is rotated through a prescribed angle.

Abstract: Drum apparatus for the treatment of hides, leathers and the like include a substantially cylindrical member having an inner interior defining surface and a plurality of substantially radially extending paddles situated within the interior. The paddles have respective lengths less than the length of the cylindrical member and together extend over substantially the entire length of the cylindrical member. The paddles form at least two groups, the paddles of each group being substantially situated in a common diametric plane, each diametric plane being both angularly and longitudinally offset relative to the diametric planes of the remaining groups of paddles.

Abstract: Increased knob pull resistance in a cylinder lock is obtained by providing the knob sleeve with an inner lug which engages in a bayonet slot in the key-actuated rollback cam sleeve so as to transmit knob pull to the cam sleeve and through such sleeve and its out-turned rollback cam to the fixed hub. Preferably, the resulting increased pull resistance is combined with that provided by forming the knob sleeve with a small stud which rides in a groove in the hub to transmit pull directly from the knob sleeve to the hub.

Abstract: A lock with pins mobile in translation and/or in rotation about their longitudinal axes, wherein the pins are housed into cylindrical passages of a rotatable cylinder and are brought by a key in positions such that cut-outs of these pins are in alignment with a passage annular path formed in a blocking fixed crown of the lock, for allowing the rotation of the cylinder and the opening of the lock.

Abstract: A key-removable core for a lock chamber of figure-8 cross section has a short cylindrical key plug housing fitting the lower lobe of the chamber and a pin tumbler housing containing a series of pin tumbler barrels, two of which are in an extension beyond the key plug housing. A key plug is contained in such housing and a control sleeve aligned with such housing beneath the extension and having pin tumbler bores aligned with said two barrels. Side faces on the pin tumbler housing and spaced from the chamber side wall provide clearance on one side for a retaining lug on the control sleeve retractable into such clearance from core-retaining engagement behind a shoulder in the chamber, and clearance on the other side for a stop lug. An operating key aligns tumblers in all barrels for shear movement at an operating shear line at the outer surface of the key plug.

Abstract: A cylinder lock is provided with means for preventing a cylinder from being extracted to improve safety against breakage of lock. The preventing means comprises a mouth member which is fixed to the cylinder at an entrance of a keyhole but capable of being broken off from the cylinder and becoming rotatable with respect to the cylinder while being undetachable. Preferably the mouth member has a hardness greater than that of the cylinder.

Abstract: An arrangement for producing double conical springs from heated rod-shaped material, in which one side of a conical-shaped spring is formed with a cylindrical end corresponding to the largest winding diameter. The end is then shaped to a conical form. After being transferred from a spring winding station to an end roll-in unit, the spring is clamped, and a shaping member is inserted radially into the spring, and moved against a stop. With the aid of a roll-in head, the cylindrical spring end is conically formed. After the shaping member is radially removed from the spring, the latter is released and transported to a hardening process.

Abstract: An indirect extrusion press including a press frame body of the Rahmen structure. The press frame body is formed of a press platen and a main cylinder frame, which are rigidly connected together. Movably disposed between the press platen and main cylinder frame is a container adapted to retain a billet therein. A die stem fixedly extends toward the container from the platen while a pressing stem slidably extends toward the container from the main cylinder frame. Hydraulic cylinders are provided with the platen to shift the container back and forth along the longitudinal center line of the press. Hydraulic coupling cylinders are also provided with a crosshead from which the pressing stem extends and the pistons of both cylinders are connected to their respective container holders. The relative position of the container and pressing stem is maintained constant during an extrusion stroke so that the container-shifting force is added to an extrusion force.

Abstract: A wheel to wheel strut camber correcting tool including a heavy rigid frame channel body with wheel bolt openings to facilitate wheel bolt mounting of the channel body on a strut wheel mounting disk, and a reversible direction screw drive assembly mounted on the top of the channel body. The reversible direction screw drive assembly has a pivotal mount in parallel spaced mounting flanges for a rotationally fixed drive screw hub housing member rotationally mounting a drive nut. The drive nut is drivingly threaded to an elongated non-rotational bolt member having a strut attachment head constructed for being removably clamped to a strut.

Abstract: Disclosed is a tool for use in a high speed progressive die which includes a spring loaded retaining member and cooperating recess surface to first position and hold the progression carried partially formed piece part prior to a forming operation which severely works the metal tending to warp, distort and lock same within the tool.

Abstract: A tube bender construction for manual operation in bending a tube. The tube bender includes a mandrel defining a bending groove into which the tube is urged by a forming member mounted to the mandrel to swing about a bending axis of the bending groove. The tube to be bent is held against longitudinal movement during the bending operation by a tube holding member. Movement of the forming member about the bending axis is effected by manipulation of a pair of handles. The tube holding member is selectively retained in a retracted position spaced from the tube-retaining disposition by cooperating movement limiting structure on the tube holding member and structure in fixed association with the mandrel.

Abstract: An automatic calibrator is provided in combination with a wheel aligner used in determining the toe angle and camber angle of a wheel. A target is connected to the wheel aligner to move therewith. When the wheel aligner is at a predetermined angle, the target is used to provide a signal indicating that the wheel aligner is at the predetermined angle. A transducer output signal is then checked to determine if the transducer output signal accurately corresponds to the predetermined angle.

Abstract: An ultrasonic measuring sensor for the fixing station of a non-mechanical printing or copying device has an electroacoustical transducer for both transmitting and receiving ultrasonic oscillation, and a reflector spaced a distance from the transducer for reflecting the oscillation transmitted by the transducer back to the transducer. The measuring path between the transducer and the reflector is surrounded by a fine mesh net having a mesh size which is significantly smaller than the wavelength of the ultrasonic oscillation. The mesh of the net is selected so as to permit the vapor concentration inside of the net to follow the changes in the average concentration at the fixing station with sufficient rapidity while shielding the measuring path against brief and topically limited concentration fluctuations.

Abstract: A device for monitoring the concentration of an air-vapor mixture in the fixing station of a non-mechanical printing or copying device has an ultrasonic transducer for generating and receiving an ultrasonic signal in the fixing station, the transit time of the ultrasonic signal between transmission and reception indicating the air-vapor mixture concentration in the station. The transit times are subdivided into at least three ranges of which the mean range or mean ranges identify a desired concentration. An evaluator circuit post-connected to the ultrasonic transducer forms signals corresponding to the ranges, the signals being entered in one of at least three status memories in accordance with their significance. The status memory which is filled first emits an output signal for triggering a corresponding reaction such as increasing the vapor density in the station, and cancels the contents of all of the status memories.

Abstract: A device for monitoring the concentration of an air-vapor mixture in the fixing station of a non-mechanical printing or copying device has an ultrasonic transducer for generating and receiving an ultrasonic signal in the fixing station, the transit time of the ultrasonic signal between transmission and reception indicating the air-vapor mixture concentration in the station. The transit times are subdivided into at least three ranges of which the mean range or mean ranges identify a desired concentration. An evaluator circuit post-connected to the ultrasonic transducer forms signals corresponding to the ranges, the signals being entered in one of at least three status memories in accordance with their significance. The status memory which is filled first emits an output signal for triggering a corresponding reaction such as increasing the vapor density in the station, and cancels the contents of all of the status memories.

Abstract: In a knock detecting apparatus for an internal combustion engine, a comparator receives at one input a knock detection signal from a knock sensor and at the other input a knock discrimination level signal produced by a knock discrimination level generator in accordance with the knock detection signal of the knock sensor. A mask circuit inhibits the passage of the comparison output signal of the comparator during a period in which a number of noises are generated from the internal combustion engine and at the same time interrupts the operation of the knock discrimination level generator.

Abstract: A knocking sensing apparatus for sensing a knocking taking place in an internal combustion engine. The apparatus includes a diaphragm adapted to operate in response to the pressure of cooling water circulated in the engine, magnetism generating device, magnetic circuit including the diaphragm, and a magnetic flux detecting device adapted to detect in a manner like alternating current the change in the magnetic flux in the magnetic circuit caused by the operation of the diaphragm.

Abstract: An engine subject to knock induced vibrations of at least two characteristic knock frequencies and noise vibrations processes the output of a vibration sensor in, for example, a square law device to generate a product component only when vibrations occur simultaneously at both characteristic knock frequencies. The amplitude of the product component is proportional to the product of the amplitudes of the two characteristic knock frequency components for an improved signal to noise ratio; and the frequency of the product component is equal to the difference of the characteristic knock frequencies. A band pass filter passes the product component to further signal processing apparatus including a comparator which generates a knock signal when the amplitude exceeds a reference. The knock signal may be used in a closed loop system to control knock in the engine.

Abstract: A device for the electropneumatical testing of the air permeability wherein each cigarette is subjected to at least one test consisting of applying pneumatic pressure to one end of the cigarette and determining the resistance or the pressure drop at the input to the cigarette. The measured pneumatic pressure is transformed into electric measurement signals which are compared with electric reference or threshold signals. According to the invention, the electric measurement signals are compared with the electric reference signals which are shaped as saw-tooth signals and are generated in synchronism with the cigarette tests, that is with the measurement signals. The ascending portions of the saw-tooth reference signals have a rate of increasing magnitude which corresponds approximately to the rate of increase of the electric measurement signals.

Abstract: A method and device for leak testing vessels such as fuel cells or tanks which are large enough for a person to move around within holding a small hand held ball or balloon type device which is provided with a large aperture. In leak testing a vessel, the aperture portion of the device is pressed against the inside wall of the vessel with sufficient pressure to form an airtight seal between the inside of the device and the wall. While maintaining the airtight seal, the device is moved over the full inside surface of the cell. If there is a hole in the cell, the device which is very compliant will tend to collapse as it passes over the hole due to a resilient pressure drop created by the hole allowing the air to escape from the device to the atmosphere.

Abstract: A signal analyzer for detecting engine defects includes sensors (11-17) for detecting engine operating parameters such as engine speed, engine exhaust manifold pressure, engine intake manifold vacuum, blowby gas pressure in the engine crankcase, and oil pressure. Electrical signals representing the frequency and magnitude of the engine operating parameters are used to produce a frequency domain spectrum signal characteristic of the engine being tested. The frequency domain spectrum signal being tested is compared to a frequency domain spectrum signal from a normal engine thereby determining at what frequencies differences between the two signals exist, such differences being indicative of engine defects.

Abstract: A method is disclosed for using a tension gauge for comparing the tension required to move a frictional element relative to the nose of a wearer of a pair of eyeglasses when the frictional element is first disposed between and in frictional contact with a first nose pad of the eyeglasses and a first side of the wearer's nose to the tension required to subsequently move the frictional element relative the wearer's nose when the frictional element is disposed between and in frictional contact with a second nose pad of the eyeglasses and a second side of the wearer's nose. The gauge includes an elongated housing which defines a bore extending along the longitudinal length of the housing, a rod slidably cooperating with the bore and a first end of the rod disposed within the housing. A spring is disposed between the first end of the rod and the housing to bias the rod to a retractable position within the housing.

Abstract: A balancing machine is used to measure the unbalance of a rotor by obtaining a first reading representative of the vector sum of the unbalance of the rotor and an amount comprising the product of the mass of the rotor and its eccentricity relative to the axis of the balancing machine. A second reading is obtained after shifting the rotor 180.degree. relative to the balancing machine while maintaining the same eccentricity, and the second reading is then subtracted from the first to obtain a final reading representative of the true unbalance of the rotor without influence of its eccentricity relative to the balancing machine. The final reading is used to effect a true balance of the rotor, and an arrangement is provided to accomplish such balance.

Abstract: In an anti-skid braking system, an improved sensor responsive to forces aciated with decleration of the vehicle road wheel. The sensor comprises a housing driven at a speed related to road wheel speed; an annular inertia mass is connected to the rotary housing via a multi-convolution hair spring wound to bias the inertia mass against the direction of housing rotation. Deceleration of the housing causes the inertia mass to angularly advance relative to the housing. A cam-follower mechanism translates the angular advance into linear motion of an output stem member located on the housing rotational axis. Stem member movement can be used to effect pulse control of the anti-skid braking system.

Abstract: A capacitive pressure transducer utilizing a plate of electrically conductive semi-conductor material sandwiched between a pair of plates of inorganic electrically insulating material and electrostatically bonded thereto. A pair of concentric circular recesses are etched in the plates in such a way as to form cavities on opposing sides of the conductive plate and to define a diaphragm area on that plate. Apertures are drilled through the insulating plates to expose the cavities to the pressures to be measured. The surfaces of the insulating plates in the cavities have deposited on them electrically conductive surfaces which form capacitors with the diaphragm area on the conductive plate. A stress relief area is provided on the high pressure side surrounding the diaphragm area. In that stress relief area, the conductive plate is unrestrained by the adjacent insulating plate.

Abstract: A narrow generator plate (10) is immersed parallel to the direction of flow in a fluid stream (14) for generating Karman vortices. The generator plate (10) has a shedding section wherein an aperture (26) intersects side surfaces (22) of the generator plate (10) to form leading aperture edges (28) which serve as shedding corners (32). The aperture (26) further intersects a trailing edge (18) of the generator plate (10).

Abstract: The apparatus herein relates to an ultrasonic measuring device having a quadrupole circuit unit. Two ultrasonic converter circuits are alternately and complementary operable as transmitter and receiver circuits and have terminals on opposite sides of the quadrupole circuit unit. The quadrupole circuit unit has a transmission signal generator on the input side thereof and a receiver amplifier on the output side thereof. This kind have a zero point displacement which becomes noticeable by the fact that during a measurement in static liquid the measured signal has different values depending on the direction. As only one transmission signal generator and only one receiver amplifier are used, these values cannot be eliminated as is possible in the case of known constructions with two transmitters.

Abstract: A mechanical flowmeter is provided for measuring the flow of hydraulic fluid in a system in which the flowmeter is connected. The flowmeter contains a spring biased piston which is responsive to the rate of flow through an annular space surrounding the piston as it moves in a tapered bore. A toroidal armature of ferrous (magnetic) material is mounted on a rod extending from the piston for movement therewith. Movement of the armature and the piston rod within a hollow guide is tracked by a permanent magnet of toroidal shape which is mounted surrounding the guide in sliding relationship. A sight glass surrounding the guide and magnet is calibrated with a scale for converting the position of the magnet to an indication of flow rate. For fluid flow in the reverse direction, the piston is moved out of the tapered bore, thus permitting free flow in the reverse direction with minimal energy loss.

Abstract: A force transducer for producing an output signal in proportion to the magnitude of an input force wherein an equal and opposite force is produced by a flexure assembly comprised of a compound leaf-spring flexure having opposed outer sections, anchored in and cantilevered from a fixed and a movable base respectively, which gradually decrease in cross-sectional area to a thin middle section wherein the movable base is constrained to linear displacement from a null or neutral position by having the force applied along a line normal to and passing through the center of the thin middle section and transmitted to the movable base through a rigid connection. A modified form of flexure assembly is disclosed comprised of parallel compound flexures each having a thin middle section and opposed outer sections which are anchored in and cantilevered from a fixed common base and a movable common base.

Abstract: This invention pertains to unidirectional vibration apparatus using resilient shock absorber mounting means to change multidirectional vibration into unidirectional vibration forces. Three embodiments pertain to the use of pressurized air for driving an eccentric weight at a desired speed. One embodiment employs a turbine which is carried between and by resilient disk members secured to mounting rings. A roller is driven by pressurized air and the vibrating apparatus is carried within and by a resilient ring. A ball vibrator also uses a resilient ring as a shock absorber.

Abstract: An arrangement for adjusting the pedals of a motor vehicle in relation to the seat of the driver, in which a movable carriage carries the pedals and terminal members of associated actuating mechanisms coupled to each. The carriage can be positioned by an adjusting spindle, and a threaded sleeve is provided for each pedal and is movably mounted on the carriage. The carriage and the threaded sleeve are uniformly displaceable by a common drive. A threaded rod passes through each threaded sleeve associated with it, and is connected at one end to linkage leading to the pedals. The threaded rods are substantially stationary in axial direction thereof. They are all rotated uniformly for adjusting the threaded sleeves so that linkages associated with the pedals remain in position when the carriage is displaced. Driving elements are connected to the other ends of the threaded rods and are driven in the same manner as the adjusting spindle.

Abstract: A mechanism for screw drive and syringe plunger engagement and disengagement for a syringe infusion pump, wherein a split-nut pair are moveable into and out of engagement with a lead screw by means of rotary cam control, the rotary cam being keyed with a crank disk that is coupled to a crank arm, which operates as the syringe plunger mover. The crank arm is rotatable into and out of engagement with the syringe plunger, such rotation also causing the split-nut pair to move into and out of engagement with the lead screw. Index and cam means are carried by the crank arm to aid in proper alignment with the syringe plunger, and a sensor is provided for monitoring proper engagement of the crank arm with the plunger.

Abstract: An adjustable steering column includes both tilting and telescoping movement. For telescoping, the steering column and to a telescope latch device which selectively engages one of a series of telescope detents. The tilt adjustment includes a slide component pivotally connected to the steering column and movable with respect to fixed vehicle structure, there being a series of detents in an edge of the slide component. Two or more separate and individually movable latches are provided on a pivotal actuating rod adjacent to the detents of the slide component. The spacing between adjacent latches is different from that between adjacent detents, so that only one latch is engaged in a detent at any one time. All latches are retracted by pivotal retracting movement of the actuating rod, and when the tilt is adjusted, a different latch engages in a detent before the just-disengaged latch reaches the next detent in the direction of movement.

Abstract: The arrangement is especially intended for mining equipment for driving a winning machine 20 along a face conveyor 11, on which the machine rides. The conveyor sections carry corresponding rack sections 30 having formations 40 each comprising two laterally spaced teeth 40a,40b, defining a channel 41 therebetween. The pinion has a disc-shaped body 43 having apertures 45 loosely mounting bands 44 of the type provided in a round-link chain. The bands engage with the teeth and the loose-mounting allows slight vertical and horizontal articulation of the bands. This reduces wear, especially at the joints between rack sections.

Abstract: A portable hand control device for operating the brake and accelerator foot pedals of a motor vehicle is disclosed. The device comprises a pair of collapsible control rods, each swivelingly connected at one end to a respective foot pedal clamp and at the other end to an elongate handle adapted to be held in either hand of the user. The handle and control rods are free of any operative connection to the motor vehicle apart from the foot pedal clamps.

Abstract: A multi-position ratchet mechanism for holding a surgical retractor blade which permits a retractor blade to be rotated into the wound and retracted at the same time to duplicate the natural "toe-in" method of retraction achieved with the hand. The ratchet mechanism includes a ratchet holder to which is pivotably attached a ratchet pivot housing. The retractor blade is mounted in an opening projecting through ratchet pivot housing and held in position by a retractor pawl attached to the ratchet pivot housing. The ratchet pivot housing also has a curved ratchet which depends into a cooperating slot in the ratchet holder and engages a pivot pawl rotatably mounted and spring biased into the ratchet slot. The holder includes a transverse slot which slides onto an oval ring which is mounted about the incision site.

Abstract: An improved differential mechanism of the holdout ring type is disclosed, characterized in that the annular holdout rings are mounted concentrically between the driven clutch members and the associated side gears, respectively, and the springs biasing the driven clutch members toward engagement with the driving spider member arranged therebetween includes a pair of compression springs mounted concentrically between the holdout rings and the side gears, each spring reacting at opposite ends between the associated side gear and annular spring retainer member, respectively. Furthermore, the driven clutch members are each provided with only one set of uniform teeth which cooperate both with driving teeth on the spider member and overrunning clutch-disengaging teeth on the center cam member. Consequently, a compact durable positive differential mechanism is provided that is of relatively simple, inexpensive construction requiring a minimum number of parts.

Abstract: An improved infinitely variable speed epicyclic drive mechanism having planet discs which are supported by a carrier and revolve on a track determined by a pair of sun discs and matching non-rotating peripheral annular members. In one embodiment, the planet discs are each rotatable in an arm or fork in turn rotatable in the carrier and means is provided to reduce centrifugally induced axial forces occuring between the planet discs and the surrounding annular members. In a further embodiment the sun discs are torque sensitively loaded towards each other for frictionally engaging the planet discs by helical gears in an epicyclic gear train to which the mechanism is coupled.

Abstract: A method for making a metal stamping die suitable for use in forming sheet metal reflectors for photographic use. The structure of the metal stamping die is made in the manner of the method to compensate for spring-back characteristics of a material used to form a reflector by first constructing a test die which has a predetermined shape related to the desired reflector shape. A comparison is then made between a test workpiece made with the test die and the desired reflector shape to determine the die shape that produces a corresponding portion of the reflector shape. Finally, another die is constructed by shaping it in accordance with the comparison to obtain a final die shape that will acceptably produce the desired reflector shape.

Abstract: A handle is provided for use with an Allen wrench by means of which leverage and grip on the wrench is improved and protection is provided in the event that the wrench should break during use. The handle is comprised of an elongated shank portion having an axial passage therein to receive the long end of the wrench. A head is provided at the end of the shank portion and formed with a recess perpendicular to and open to the shank passage to receive the short end of the wrench. A spring-loaded pivoted finger providing a toggle action is mounted in the head to hold the end of the wrench within the handle during operation thereof.

Abstract: An accessory for use with a screw driver and screw to prevent the screw driver from accidentally sliding off the screw head. The accessory is a sleeve having a bore to accept freely the screw driver bit and screw therein to permit rotation of the screw driver and screw relative to the bore. A releasable securing structure is mounted on the sleeve so as to engage the surface to receive the screw when an inner end of the sleeve is adjacent the surface, so as to releasably secure the sleeve to the surface. One embodiment of the releasable securing structure includes suction cups mounted adjacent the inner end of the sleeve and positioned so that there is a clearance between the end of the sleeve and the cups to permit the cups to be deformed elastically from an inactive condition prior to attachment to the surface.

Abstract: An electronic musical instrument which can be manufactured at low cost using a system of generating frequency information corresponding to the note of each key as a frequency number on a non-real time basis. The electronic musical instrument is provided with a frequency number memory for storing the frequency number corresponding to the note of each key and delivering the frequency number corresponding to key information from a key assignor, means for executing an operation in units of the delivered frequency number a plurality of times and transferring the operation result to a buffer memory upon each execution of the operation, and a memory for storing the results of the operation executed the plurality of times.

Abstract: A percussion generator for an electronic musical instrument, such as an electronic organ, wherein the percussion generator is responsive to a time division multiplexed serial data stream produced by scanning the keys of the keyboard. A control pulse is produced each time that a new key on the keyboard is depressed, and this pulse, which has a duration equal to or greater than a plurality of scans of the keyboard, is employed to produce a burst of keydown pulses in the data stream. The percussion generator is responsive to the serial data stream and each of the aforementioned control pulses to produce keydown pulses in the appropriate time slots of the data stream in a plurality of successive sequences thereof and then terminate the keydown pulses even though the associated keys remain depressed.

Abstract: An electronic musical instrument includes an upper, lower and pedal key boards and a solo keyboard, key switches and associated circuits for producing key codes of the depressed keys, and musical tone signal generators which generate musical tone signals in accordnace with the key codes. A priority selection circuit is provided for selecting a single key code from among a plurality of concurrent key codes with respect to plural keyboards in accordance with a predetermined order of priority, and a musical signal is generated by a predetermined generating system for producing a musical tone signal generator in accordance with the selected key code. Thus, a special intermanual coupler effect is realized.

Abstract: To drop objects from a container or receptacle mounted at an aircraft there is beneficially employed a pressure head. For this purpose the object mounted internally of the container upon guide rails is impinged at its front end by the flight-pressure head of the aircraft, so that it is ejected from the tail end of the container. For rapidly realizing the necessary safety distance between the aircraft and the dropped object at the tail end of the container there is deflected a flow onto the departing object, so that a pressure pulse is applied to the object and it is accelerated. The invention is particularly suitable for accurately laying a multiplicity of objects at surface-like or areal targets i.e. upon a given terrain. Its use is contemplated for both civilian applications, such as dropping life saving and supporting equipment and so forth, and military applications, such as for dropping bombs, mines and other ordinance. The apparatus is extremely simple and functionally reliable.

Abstract: A pipe-shaped protective cover for a gun barrel mounted over at least a portion of the outer periphery of the gun barrel. The protective cover includes a first-insulating layer joined to the outer surface of the gun barrel; a second heat-conducting layer mounted on said first layer; and at least one additional heat-insulating layer followed by at least one additional heat conducting layer which are mounted in that order on the second aforementioned layer. The invention envisages a firm mounting of the protective cover on the gun barrel without the formation of intermediate air gaps between the cover and the gun barrel.

Abstract: A lightweight ammunition magazine capable of storing a plurality of "tiers" of ammunition within a semi-monocoque shell without the use of separation partitions between the tiers includes a top and a bottom panel separated by a plurality of partitions to form a plurality of ammunition storage and guiding channels between the top and bottom panels. An endless chain ladder is disposed within the storage and guiding channels for transporting the stored ammunition within the storage and guiding channels to a magazine exit port. The endless chain ladder is configured for holding at least two tiers of ammunition rounds between the top and bottom panels with a longitudinal axis of each ammunition round being approximately perpendicular to the top and bottom panels.

Abstract: The hatch of a military vehicle is hermetically fitted with a crewman's shelter formed of flexible material for receiving the upper portion of a crewman's body, including his head, shoulders and arms. The head-receiving portion has a vision plate and is connected to the crewman's head for rotation of the vision plate with his head. The shelter has gloved sleeves for receiving the crewman's arms and the entire shelter is collapsible inside the hatch when the hatch door is closed.

Abstract: A stroke cushioning apparatus for a hydraulic cylinder provided at rod side stroke end and/or head side stroke end. The rod side stroke end cushioning apparatus comprises a sleeve mounted on a piston rod and a cushion ring mounted on the inner face of a housing defining a passage which accommodates the sleeve when a piston assembly is moved to its rod side stroke end. The cushion ring is allowed to move slightly in an axial direction. When the piston assembly is moved towards its rod side stroke end and the sleeve enters into the passage, flow of fluid is restricted between the cushion ring and the sleeve thus effecting a cushioning action to the piston assembly.The head side stroke end cushioning apparatus comprises a plunger mounted to the piston rod and wall of a passage formed at the head end of the cylinder. The plunger is mounted to the piston rod by means of a plurality of balls with allowing slight movements of the plunger both axially and radially.