Abstract: A metric gauge including a planar body having formed therein a plurality of varying sized sockets suitable for measuring wrench size, screw size, and nut size. A scale with offset index shoulder is also provided to measure bolt and screw length.Each of the sockets is hexagonally or otherwise formed at the planar body to receive a bolt head or nut therein to precisely measure wrench size. A seat or shoulder for the bolt head or nut is formed below the planar surface at each socket to rest the bolt head or the nut thereon when sizing.Each of the sockets is downwardly formed to a hollow cylindrical configuration of a varying diameters for bolt diameter measuring purposes. Each socket terminates downwardly in a cylindrical bottom of known outside diameter to receive thereon a nut for gauging the nut diameter. The scale edge of the planar surface is impressed with a plurality of graduations which may be in millimeters or inches which extend from the index shoulder.

Abstract: Apparatus for determining pellet length and end squareness which includes a base supporting a pair of linear variable differential transformers (LVDT) between which a pellet is placed for measuring end squareness. The LVDT's are perpendicularity detectors and each includes appropriate windings contained in a housing and an armature axially slidable therein. The armature is mounted on a shaft having extensions on opposite ends thereof. A swivel plate is attached to one end, while the other end is supported in a framework for the inspection apparatus, the arrangement being such that the housing containing the windings moves axially relative to the stationary armature. When a pellet is placed in position, each detector is advanced toward the pellet until its swivel plate contacts the pellet ends. If the pellet ends are not square, the swivel plates cock at an angle, thereby displacing the windings with respect to the armature.

Abstract: The precision measuring apparatus comprises a portal mounted to translate on a platform and comprising two uprights supporting a first cross-piece along which runs a carriage bearing a measuring head. The weight of the carriage is unloaded through resilient means on to a second cross-piece disposed parallel to and below the first cross-piece. The second cross-piece is a part of a second portal having two columns translating on the platform together with the first portal. The columns of the second portal are disposed inside the uprights of the first portal, which uprights are hollow, and are moved by the upwriters by means of opposed pairs of compression springs disposed between each column and the corresponding upright.

Abstract: A probe for use in measuring machines comprises a stylus holder tiltably supported on three first seats arranged about an axis and on one side of an intermediate member. The intermediate member is tiltably supported at its other side on three second seats provided on a housing on the same pitch circle as the first seats but intermediate between the first seats. The stylus holder is therefore supported with the stability inherent in a three-point support but is tiltable about any two adjacent ones of six seats thereby improving the sensitivity of the probes.

Abstract: A precision tool is disclosed herein for locating the center of a workpiece having a shaft detachable coupled to the spindle or chuck of a drill press. Downwardly depending from the shaft is a housing enclosing either an electro-mechanical pendulum or an optical device having a bubble target. A holder is provided for the workpiece so that the workpiece may be positioned until the target lies along the central longitudinal axis of the pendulum or the optical axis whereby the workpiece is centered with respect to the spindle or chuck of the drill press.

Abstract: An apparatus and a method of providing runout compensation for wobble present in the measurements made of the orientation of a rotary body relative to at least a pair of planes, and including at least a pair of sensors for providing measurements angularly related to each other and with the sensors coupled to the body for providing signals representative of the measurements of the rotary body relative to at least the pair of planes at a particular angular relationship. The body is rotated through a plurality of positions for providing signals representative of the measurement of the body relative to the pair of planes at the different positions. A first output signal is produced and is representative of the orientation of the body relative to one of the planes in accordance with the measurements at the different positions in the one plane and with the measurements in the one plane used to provide a runout compensation for wobble present in the measurements.

Abstract: The invention disclosed relates to a device for locating celestial bodies by reference to Right Ascension and Declination, and the device is intended to locate using either, R. A. with Declination, or Azimuth with Altitude, or both. However, the use of R. A. and Declination is its primary asset due to the accuracy of its use. The device includes a support platform with orientation indicators, and a pivotal inclined platform is positioned a right ascension-azimuth dial and a right ascension indicator-declination scale piece, both joined about a common axis for rotation. The right ascension indicator-declination scale piece has a support arm disposed thereon for support of a telescope which serves as a viewing means for the celestial body which is located. The device is simply configurated, extremely accurate, and highly effective for use by astronomers generally.

Abstract: A wrist mounted hair drying apparatus for blowing heated air to the palm of the hand wherein it could be directed to the hair of the user in concentrated form. The apparatus includes a motor driven blower mounted by a strap on the wrist of the user. The outlet of the blower includes a flexible hose terminating in an oval-shaped ring mounted over the fingers of the user and having a plurality of air openings along one surface thereof adjacent to the palm for concentrating air from the blower in the palm of the hand of the user. Alternatively, a ring can mount a flexible hose having one or more ducts on the finger of the user, the hose being connected to the blower outlet.

Abstract: A ski boot having an ankle cuff which is movable relative to a lower shell about a transverse axis which is provided at approximately ankle height on the ski boot. A bar-like device is secured to and extends between the lower shell and the ankle cuff. A tensioning lever is provided to control the position of the bar-like device to regulate the extent of the relative movement between the ankle cuff and the lower shell.

Abstract: A compact, lightweight snow thrower having a power driven impeller rotating about a horizontal, transverse axis to throw snow upwardly and forwrdly through a chute which is substantially coextensive in width with the axial length of the impeller. A plurality of laterally spaced upright vanes are disposed in and pivotally connected to the upper end of the chute for the purpose of directing the discharge of snow. The vanes are pivotally connected to a control bar whereby movement of the control bar effects simultaneous lateral tilting of the vanes. The vanes include a centrally positioned set which are parallel to one another and a pair of vanes at each of the laterally opposite sidewalls of the chute which are disposed at upwardly converging angles to one another so as to compress the column of discharged snow. One of the sidewalls of the discharge chute is also inclined laterally inwardly in an upward direction.

Abstract: A compact, lightweight snow thrower having a power driven impeller rotating about a horizontal, transverse axis to throw snow upwardly and forwardly through a chute which is substantially coextensive in width with the axial length of the impeller. A plurality of laterally spaced upright vanes are disposed in and pivotally connected to the upper end of the chute for the purpose of directing the discharge of snow. The chute includes a front wall portion which serves as a support for the discharge directing vanes and as a strike-off wall preventing jamming of the discharge chute when the snow thrower encounters deep snow. Snow thrown by the impeller against the front wall portion tends to fall down because of its vertical disposition.

Abstract: A compact, lightweight snow thrower having a power driven impeller rotating about a horizontal, transverse axis to throw snow upwardly and forwardly through a chute which is substantially coextensive in width with the axial length of the impeller. A plurality of laterally spaced upright vanes are disposed in and pivotally connected to the upper end of the chute for the purpose of directing the discharge of snow. A vane adjusting mechanism includes a transverse, laterally shiftable vane adjusting bar which is connected to the vanes through pairs of laterally spaced fingers extending forwardly from the control bar on opposite lateral sides of the vanes. Lateral shifting movement of the bar effects simultaneous lateral tilting of the vanes. The vane adjusting bar includes a pair of rearwardly extending stud parts which extend through slots in the rear wall part of the transverse recess in the rear wall of the discharge chute in which the bar is disposed.

Abstract: A hole filling machine comprising a driven vehicle having a frame with a substantially horizontal rotatable blade assembly adjustably suspended therefrom. The assembly includes a circular housing with a central opening having a driven, rotatable, hollow vertical shaft disposed axially thereof. A plurality of arcuate blades extend outwardly from the shaft toward the periphery of the housing. A safety switch is operatively connected to both the drive for the vehicle and the shaft.

Abstract: Building construction from modules of inverted U shape a full story high with a span of 10 to 30 feet and a depth of 2 to 6 feet. The modules may be monolithic such as of reenforced concrete or plastic foam, or may be of light weight hollow metal construction, assembled together with partitions and end panels. Cast modules can be cast between thin previously formed sheets held by framework to form casting mold, the sheets becoming surfaces of the module.

Abstract: In a paper supplying devide in a coin wrapping apparatus, different kinds of paper, each wound into a roll, are supported respectively on a corresponding number of paper supporting members mounted on paper carrying body. According to the kind of coins selected for wrapping in the coin wrapping apparatus, the paper carrying body is rotated to a position where a suitable kind of paper is supplied to a coin wrapping mechanism of the coin wrapping apparatus and cut into a predetermined length by a single cutting blade, which can be retracted from the path of the movement of the paper carrying body.

Abstract: A method and apparatus for preparing a casing loaded with a plurality of articles such as small-sized electronic parts for use in the electronic industries, which ensures that the stored parts will be positively and stably aligned in the casing without the possibility of any play or disorientation from their regular positioning within the casing. The casing is provided with a single piece resilient element which is inserted into the casing, the resilient element being designed to resiliently expand against the inner wall surface of the casing to frictionally engage therewith. Thereafter, a plurality of parts are inserted one after another into the casing so that they become stacked in a serially aligned manner inside the casing against the resilient force of the resilient element, thus preparing a casing loaded with a plurality of parts therein stacked in a serially end-to-end resting state.

Abstract: A machine which drops flat articles such as flattened cartons into a case. The articles are delivered to a basket having a floor which can be opened. The basket is mounted for up and down movement. The case is mounted below the basket with its top open and can be held in position by vacuum cup means. When the stack has been formed, the flow of articles is halted and the basket can be lowered into close proximity to the open top of the case. The basket floor is opened to drop the stack into the case. If desired, two stack sections can be formed and dropped into a single case one after the other. When the stack has been dropped into the case, the basket is raised to free the basket from the case. The vacuum is released, and the case is then advanced laterally out of alignment with the basket. The case can then be raised by a lift table to a convenient height for inspection and, following inspection, can be discharged.

Abstract: An agricultural crop harvester's feeding and gathering units are driven by a power source on the harvester through a sheave assembly journaled on a countershaft mounted towards the rear of the feeding unit. Power is then transmitted by a variable ratio V-belt drive to a speed reducing and direction reversing planetary gear unit mounted forwardly on the feeding unit and finally to the gathering and feeding mechanisms by drives of conventional design. In the variable ratio V-belt drive, the effective diameter of a split sheave output portion of the countershaft sheave assembly is selectively adjusted hydraulically while, in inverse response, the effective diameter of a spring loaded variable driven split sheave, integral with the planetary gear unit, adjusts automatically. In addition, the driven sheave is provided with a coaxial cam arrangement responsive to changes in torque transmitted so that its effective diameter also adjusts automatically to provide appropriate belt tension.

Abstract: A locking mechanism for the height adjusting suspension system of side delivery rake is disclosed. A support trunnion bearing for the rotatable axially-adjustable height control rod of a rake has at least one crown thereon to cooperatively engage a mating washer which is biased into contact therewith by a compression suspension spring to thereby impede relative rotational movement between the rod and the bearing.

Abstract: Servicing apparatus is provided for servicing a multiplicity of spinning assemblies arranged side by side in open end spinning frame. The apparatus includes a plurality of part instruments for performing separate servicing operations at respective ones of the spinning assemblies, such as part instruments for cleaning, piecing up operations, and spindle bobbin exchanges. Since these part instruments are geometrically wider in the travel direction thereof than are the individual spinning assemblies, the invention involves a geometric arrangement of the various parts within the part instrument so as to accommodate simultaneous servicing of adjacent spinning assemblies by two different part instruments, without the part instruments blocking one another.

Abstract: Process and apparatus for transferring heat between an advancing filamentary yarn and a fluid in which the yarn is passed through a vortex in the fluid substantially along or parallel to the longitudinal axis of the vortex.

Abstract: An electronic timepiece comprising an oscillating circuit for producing a standard time signal, a dividing circuit for dividing the output signal of said oscillating circuit and a driving circuit. The output signal of said driving circuit is controlled by a controlling circuit cooperative with the dividing circuit for changing the division of the standard time signal.

Abstract: The combination of a burner and a gas turbine in which the burner is divided into a combustion zone and a dilution zone. Means are provided to vary the fuel-to-air ratio within the combustion zone by diverting air directly to the dilution zone to produce exhaust gases for driving the turbine which have a relatively low content of nitrogen oxides, carbon monoxide and unburned hydrocarbons.

Abstract: An internal-combustion spark-ignition V-8 piston engine has a main exhaust gas reaction chamber positioned between the two banks of cylinders. Each cylinder has a main combustion chamber and an auxiliary combustion chamber connected by a torch nozzle restriction. Valved intake passages supply lean mixture to the main combustion chambers and rich mixture to the auxiliary combustion chambers. A spark plug is associated with each auxiliary combustion chamber. Valved exhaust passages supply hot exhaust gases to auxiliary exhaust gas reaction chambers, each of which projects through an insulated wall of the main exhaust gas reaction chamber, and discharges into it.

Abstract: An engine having an even number of cylinders is caused to produce two differently composed exhaust gases, one rich in air and the other in unburned fuel and CO, from the two groups of cylinders each consisting of half the number of cylinders being fired in succession, which exhaust gases are fed separately to a thermal reactor and allowed to gradually mix with each other for mild and slow reaction therein.

Abstract: A reciprocating motor comprises a reciprocating device composed of a vertical cylinder having a bottom opened to a water supply pipe provided with a valve and a piston having valve means which is opened to allow a downward movement of the piston by gravity and closed to allow an upward movement of the piston by water pressure, a pumping device composed of at least a pair of piled annular tanks provided with valves to allow selective communication between the tanks or between the cylinder and the tank, means provided with valves to allow selective communication between either tank and a pressure source and relay switch means for operating the valves in sequence.

Abstract: An accumulator for a hydraulic control system of frictional engagement mechanisms comprises a housing with a stepped bore, a first stepped piston reciprocable within the bore to form a back pressure chamber communicated with a source of line pressure, a second piston reciprocable within the first piston in a predetermind stroke to form an accumulation chamber communicated with the line pressure source, and a spring for biasing the second piston toward the accumulation chamber. In the initial stage, only the second piston is retracted against biasing force of the spring to modulate the line pressure acting on the frictional engagement mechanisms and is engaged at its retracted stroke end with the first piston. Subsequently, the first piston is retracted together with the second piston against the biasing force and the pressure in the back pressure chamber to further modulate the line pressure.

Abstract: A heat engine employs counterrotating rotors disposed in different cavities of a stator. The engine provides a heat recuperator which removes heat from working medium confined in a rotating constant volume chamber in one cavity and utilizes that heat to heat working medium confined in a rotating constant volume chamber in another cavity. Each rotor carries partitions forming separate chambers in its cavity and each cavity has a blocking means which permits the partitions to pass but prevents working medium from making a complete orbit in the cavity whereby the working medium is caused to flow from one cavity to another through ducts disposed near the blocking means.

Abstract: A single rotary fluid unit can act either as a compressor or as an expander. Each unit has a casing enclosing two rotors moved in synchronism. The rotors sealingly engage and coact with each other and the casing walls to form chambers providing the necessary intake and exhaust functions. Two units can be connected together to operate in a mirror-like or reverse fashion whereby one unit is a compressor and the other unit is an expander. The thus formed compressor-expander units or apparatus can be connected to additional apparatus to form a Stirling cycle engine or an air cycle refrigeration apparatus.

Abstract: An exhaust braking valve is provided for use on an internal combustion engine having an exhaust manifold and a turbocharger associated therewith. The braking valve comprises a hollow section having an inlet communicating with the discharge side of the exhaust manifold and an outlet communicating with the intake for the turbine section of the turbocharger. Disposed within the hollow section is an adjustable member having a flow passage formed therein which, when the member is in a selected first position of adjustment, interconnects the inlet and outlet and effects unrestricted gas flow through the valve. When the adjustable member is in a selected second position of adjustment, a segment thereof assumes a gas flow blocking relation with respect to the inlet and outlet of the hollow section.

Abstract: A system for the effective utilization of low-grade heat sources such as solar energy, with a system including a molecular sieve material such as zeolite and a gaseous fluid adapted to be absorbed by the material which is in a closed container and circuit which includes a condenser and a gas expansion cooler member. When the container is heated, a gas is given off from the molecular sieve material, cooled in a condenser, and thereafter expanded for cooling purposes. In one embodiment, the cooled gas is received in a further container having absorbent material and subsequently, upon cooling of the first container, the gaseous fluid may be returned thereto via again a condenser and gas expansion cooler member to provide further cooling. In another embodiment, the molecular sieve material is formed by sintering same to form a pressure resistanr divider across the container.

Abstract: A system using a number of flash chambers for converting the heat energy of geothermal brine to useful work. The system uses steam from flashed brine to vaporize a portion of distilled water or distillate in one or more heat exchangers to produce steam to drive a turbine which, in turn, operates a generator or the like to produce useful work. Before the distillate reaches the heat exchanger, it is preheated as it flows through a series of flash chambers in countercurrent relationship to the flow of geothermal brine therethrough. The brine flashes in each flash chamber and the flashed vapor mixes with the distillate flowing through the flash chamber to pre-heat the distillate. The heat energy of the unvaporized part of the distillate in the heat exchanger can form additional steam which is also supplied to the turbine. The heat content of the unflashed part of the distillate can be used in several ways to heat a working fluid in a closed loop containing a second turbine.

Abstract: The heat and flu gases which are ordinarily expelled through an emission stack of a conventional furnace are instead channeled through a heat exchanger to produce steam for power generation and are subsequently directed through a gas scrubber apparatus to remove all contaminates from the flu gas prior to expelling the gases into the atmosphere.

Abstract: A device for positioning a pipeline intended to rest on the bottom of the sea or of a body of water. In order to present a resistance to the drifting of the pipeline by the action of cross-currents, the pipeline is provided with a plurality of support members suitably distributed along the pipeline and extending in a direction generally parallel to the vertical plane containing the longitudinal axis of the pipeline. The support members project below the pipeline towards the bottom and are deformable in the vertical plane by the reaction of the bottom on the support members, but are transversely rigid.

Abstract: Apparatus and process for cooling unfrozen foodstuff to a desired low temperature below its freezing point, in which a supply of inert gas is used to provide a controlled atmosphere in the freezing chamber; and this controls vapor pressure, dry bulb temperature, wet bulb temperature, and the chemical composition of the atmosphere. A mechanical or refrigerant fluid system supplies the refrigerant effect for lowering the foodstuff's sensible range above freezing, latent heat of fusion, and sensible range below freezing, to the desired temperature sub-freezing sensible heat range.

Abstract: Heat is transferred from a cold heat source to a hot heat sink by an absorption type heat pump wherein the working fluid and the absorbent liquid are capable of forming a solution having a lower critical solution temperature t.sub.c. The working fluid at a low pressure extracts heat from the cold source and is reabsorbed in the absorbent liquid to form a solution which, at a higher pressure, is heated above t.sub.c to separate the working fluid from the solution. The heat requirement for this separation is less than that for distillation in prior heat pumps.

Abstract: Apparatus responsive to leaks occurring in a heat exchanger between a first tubular passageway which transports a heat transfer fluid at a relatively low pressure and a surrounding concentrically second tubular passageway which transports a refrigerant at a relatively higher pressure and including a sensor positioned to respond to the occurrence of a leak permitting the refrigerant to pass into the first passageway, a relay which is actuated by the sensor upon detection of a leak, and a plurality of valves which may be selectively actuated to interrupt the flow of either or both fluids through the heat exchanger.

Abstract: A bracket assembly is provided for securing an auxiliary cooling system to a main automobile cooling system. The bracket assembly provides two one piece wire rods having their ends attached one to the other to form a closed loop. The loops are elongated with two parallel arms interconnected by curved ends. The loops are mounted parallel one to the other on an automobile cooling unit. An auxiliary cooling unit is mounted to the brackets by bolt assemblies which are engaged through the loops formed by the rods. The auxiliary cooling system may be positioned relative to the main cooling system by sliding the unit along the longitudinal length of the loops. The auxiliary system is fixed in a desired position by engaging the bolt assembly to clamp the auxiliary cooling system to the bracket assembly.

Abstract: A cold storage apparatus in which a gas in a cold storage chamber is fed to a cold water spraying cyclone to make low temperature, moisture rich gas and this gas is fed to a water droplet removing cyclone to remove water droplets and then the resultant low temperature moisture rich gas is allowed to circulate through the cold storage chamber.This cold storage apparatus enables constant low temperature moisture rich cold storage at an optional temperature, and in which apparatus a stable storage of vegetables, fruits, meats and so on can be attained without producing frost and causing drying thereof.OBJECT OF THE INVENTIONAn object of the present invention is to provide a cold storage apparatus for allowing cold storage at a low temperature in a moisture rich condition absolutely without causing freezing.Another object of the present invention is to provide a cold storage apparatus wherein perishables such as vegetables, fruits, meats and the like can be preserved for a long period at a temperature from 0.5.

Abstract: A heat pump split system type air conditioner having an indoor and outdoor section, the outdoor section being compartmentalized to provide an insulated compartment containing the motor-compressor and fan motor so that heat from the fan motor and motor-compressor can be partially recovered and added to the circulating system refrigerant to increase the heating capacity of the heat pump.

Abstract: A chiller for edible food products of the type employing hygroscopic liquid refrigerant is disclosed. The chiller includes an enclosure having an entrance and an exit. A conveyor transports edible food products within the enclosure from the entrance to the exit thereof. The conveyor defines a plurality of angled flights or runs which extend within the enclosure in spaced, parallel relationship to each other and transport the product generally vertically and horizontally along each of the flights within the enclosure in a serpentine fashion. A liquid refrigerant supply including a distribution pan is supported above the enclosure for directing liquid refrigerant downwardly over the edible food products carried by the conveyor. The liquid refrigerant contacts or intersects several of the flights in a cascading manner thereby contacting a plurality of the food products which are vertically spaced and carried on different flights of the conveyor.

Abstract: A solid adsorption air conditioning apparatus and process using water or ammonia refrigerant in a generator-condenser-evaporator-adsorber cycle wherein the refrigerant is adsorbed on a solid adsorbent coated on the interior of a combination adsorber-generator module and then generated from said adsorbent, the adsorber-generator modules alternately performing each of these functions. The apparatus and process may be used for cooling and heating functions by simple adjustment of dampers. The apparatus and process provides an air conditioning apparatus which may utilize solar heat for a substantial portion of its energy input requirements and does not require any liquid pumping.

Abstract: A refrigerator having a cooled induction motor, the housing interior of which is completely filled with a cooling medium, and having a cooler for the re-cooling of the cooling medium in the housing interior by means of another medium separate from the cooling medium of the motor, in which insulating cooling oil is contained as cooling medium in the housing interior of the induction motor.

Abstract: Studs are threaded into the end walls of the bearing cups of a universal joint cross and may be adjusted into contact with the outer ends of the trunnions to take up axial end play between the bearings cups and the trunnions while avoiding axial pressure between the cups and the trunnions.

Abstract: A device for facilitating knitting of cable stitch patterns having an elongated, bluntly pointed straight shank and a continuation of the shank formed in a loop of more than 360.degree., with a portion of the loop curving back into closely spaced proximity to the shank, the spacing being less than the thickness of the yarn being used. An end portion of the loop has a curvature exceeding the curvature of the adjacent portion of the loop so as to diverge from the latter.

Abstract: A circular knitting machine has a needle selection system which can be set up to provide selection under electronic control, or to provide for manual selection. The selection system has a plurality of slidable selection cams which are controlled by an electro-magnetic system to act on rocking selector jacks, the electro-magnetic system being operated by an electronic control program. For manual selection, the electro-magnetic system serves to hold all of the selection cams in an excluded position and selection is obtained by manually insertable cams which act on the selector jacks.

Abstract: To permit, selectively, positive feed or demand feed of yarn or thread to a utilization position of a textile machine, a rotating drum has a storage winding place thereon. A thread guide element is located laterally next to but below lower edge structure of the thread supply drum to permit drawing-off of yarn on the positive feed condition and preventing reverse winding of thread or yarn on the drum; additionally, a pull-off element is located either fixed, or rotatably about the axis of rotation of the drum in a plane which includes the axis of rotation of the drum below the bottom edge structure so that the thread or yarn can be selectively guided in a path inclined downwardly inclined exteriorally through the thread guide element 19 over the edge of the thread supply drum on in a different thread path over the pull-off element and then through the thread guide element.

Abstract: A set of handcuffs having two wings connected by means of a hinge wherein the hinge sections are formed directly on the wing section walls and the handcuff locking mechanism operates as a hinge pin to hold the wing sections together and as a locking device. Each wing section comprises an arcuate bow portion and a shackle portion which pivots about a pivot pin holding the two sections together and which allows the shackle portion to swing through an arc of 360.degree.. A detent or pawl, cam operated and spring and pin biased, engages and disengages teeth formed on the shackle to alternately hold the shackle in place and allow it to swing open.

Abstract: In a padlock having a ball-locked shackle and a removable key-operated cylinder:A cam retaining means consisting of a serrated pin in combination with a coiled spring;A shackle retaining means comprising a tapped shackle end and a threaded flanged member in conjunction with a ball and cam detent.

Abstract: A flush-mountable, key-controlled, handle-operated door lock is provided with an automatic self-locking linkage for permitting the handle to move once, but only once, out of a nested position after a key control has been operated to "cock" the linkage. Once the linkage has been cocked, the handle can be moved one time out of and returned to its nested position, whereafter the linkage operates to retain the handle in its nested position until the key control is again operated to cock the linkage. The automatic latching linkage includes a housing assembly, a pair of cams, and a pair of springs. A feature of the automatic latching linkage is that its several components can be assembled easily on an existing, in-service lock to provide the existing lock with a one-trip automatic locking capability. The latching linkage components are assembled by installing the components one at a time in an essentially stacked arrangement, one atop the other.