Abstract: A method of making a core yarn in which a pair of flattened slubbings or fiber-fleece strips are passed through a stretching arrangement comprising a plurality of pairs of rollers, the slubbing being engaged in the nips of the rollers, with the core thread being fed to each of the slubbing strips in the nip of the last roller pair. According to the invention, the two slubbing strips are passed directly adjacent one another (either in contact or with a small spacing) through the nip of the last roller pair and immediately downstream thereof, the combination of strips and the respective core threads are spun together.

Abstract: A mechanical spring-powered hand-held digital stopwatch having a gear-operated decade counter display assembly, a spring-powered windup mechanism adapted to reset the counter during winding by means of a unidirectionally activated ratchet assembly, and a cam adjustable timing escapement mechanism, the escapement mechanism including an escapement gear actuating a balance through a limited pivotal angle, the angle of pivoting being governed by cam means interposed between a pair of arms carried by the balance.

Abstract: A chain shackle has a pin thereon for mounting the shackle on a hanger. The pin extends across the ears of the shackle and is permanently connected thereby by flaring a pair of fingers at one end of the pin into enlarged pockets formed in the bore of the ear through which the pin passes.

Abstract: A wet oxidation apparatus comprising a reactor vessel, means for continuously introducing combustible material, water, and oxygen containing gas, into the reactor; the heat of combustion in the reactor being sufficient to evaporate the water supplied to said reactor, means controlling the quantity of water fed to the reactor, thereby maintaining the liquid level in the reactor, and a gas and water vapor outlet for the reactor; gas and water vapor discharging from the reactor being passed through a turbine or similar device to produce mechanical power. The air supplied to the reactor is controlled to be insufficient to oxidize all of the fuel supplied to the reactor, or alternately, the reactor is operated in a way to enrich the gas and water vapor stream discharging from the reactor with organic matter, said enriched stream being subjected to vapor phase oxidation creating a superheated stream improving the efficiency of the power producing cycle.

Abstract: An electronic control for a multi-engine gas turbine installation includes two channels each containing a low wins gate with a signal error input and an acceleration limit input, the output of the low wins gate being applied via a high wins gate to an electronic integrator the output of which is compared with a speed signal to provide fuel control for speed governing. For balancing the two channels a difference amplifier provides an output containing information related to the output of one or other low wins gate and the difference between the values of a given parameter of each engine. This acts to control this difference both during steady running and acceleration.

Abstract: Airflow exiting a centrifugal compressor is diffused in multiple shaped passages tangential to the compressor impeller dumped into a plenum to reduce its Mach number and then directed through deswirl vanes to the entrance of a combustor. Deswirl at reduced Mach number significantly reduces pressure losses resulting in reduced complexity and manufacturing cost for the diffuser deswirl system.

Abstract: Apparatus for supplying fuel to the combustion chamber of a gas turbine engine is disclosed. Techniques for increasing combustion efficiency and for decreasing the percentage of noxious emissions in the effluent from the chamber are developed. Axially extending tubes are used extensively in the disclosed embodiments of the invention for premixing gaseous or vaporized fuel with air in the supply means upstream of the combustion chamber. In addition to operation on natural gas and vaporized liquid fuels, the embodiments shown are adaptable to efficiently burn gasified coal fuels having heating values as low as 80 BTU per standard cubic foot (BTU/scf).

Abstract: An engine exhaust gas purification system comprises an E.G.R. passage for the recirculation of engine exhaust gases from an exhaust system of an engine back into an intake system downstream of an engine throttle valve. A first E.G.R. control valve is provided in the E.G.R. passage and operatively connected to the throttle valve to control E.G.R. flow through the E.G.R. passage. A second E.G.R. control valve is provided in the E.G.R. passage upstream of the first E.G.R. control valve to control E.G.R. flow toward the first E.G.R. control valve. A valve controller is provided for the second E.G.R. control valve and operative in response to the variation in the pressure in the E.G.R. passage between the first and second E.G.R. control valves to control the second E.G.R. control valve so that the pressure is maintained substantially constant.

Abstract: A control system for adjusting the amount of a secondary air to be fed into the exhaust system, comprising a secondary air control valve (ACV) for controlling the amount of the secondary air from an air pump, vacuum switching valves (VSV) alternately effecting an operative vacuum on the ACV, and a vacuum control valve (VCV) which is connected to the VSV via a first vacuum reservoir tank and to the intake vacuum area via a second vacuum reservoir tank.

Abstract: An air-fuel mixture containing a relatively large amount of recirculated exhaust gases is smoothly and rapidly burned by producing squish turbulence and igniting the mixture with a plurality of spark plugs.

Abstract: A damper door is swingably disposed in an exhaust system downstream of an afterburning device to open or close the exhaust tube or pipe in response to movement of a throttle valve of an air-fuel mixture supply means such as a carburetor.

Abstract: A method and apparatus are disclosed for mechanically steering vehicles such as crawler tractors and the like or skid steer tractors, which include a pair of independently operable power sources. The apparatus includes a pair of independent first linkage systems interconnected between a single operator control lever and each respective power source to achieve equivalent power outputs from the sources upon movement of the lever. A pair of independent second linkage systems are interconnected between respective links in the first linkage system and respective throttling means. In the method, each throttling means may be operated independently of the other to achieve unequal power outputs from the two sources by virtue of the independent first and second linkage systems.

Abstract: An improved pressure sensitive valving arrangement is provided for a power steering unit for a lift truck, and in particular for a battery powered lift truck. To the conventional implement valve is added an accumulator charging means which includes an additional valve, herein called a "blocking or control valve", which additional valve is downstream from the implement valve and which additional valve, when actuated, blocks the flow of fluid through the implement valve to thereby build up pressure for charging an accumulator. The blocking valve includes a blocking spool which operates against a pressure-actuated pilot plunger such that when the pressure in the accumulator reaches or exceeds a predetermined amount, the pilot plunger shifts the blocking spool to permit the fluid to again flow through the implement valve.

Abstract: A hydraulic fluid supply system for providing pressurized fluid to fluid actuated components on a refuse collection vehicle, generally including a fluid tank, a pump operatively connected to the crankshaft of the refuse vehicle engine for continuous operation and having an inlet communicating with the tank, a diversion valve having an inlet communicating with the outlet of the pump and having an outlet selectively communicating with the tank and the fluid actuated components on the refuse collection vehicle, means for increasing the idle speed of the engine to a predetermined actuation idle speed when the diversion valve outlet is communicating with the fluid actuated components, and means for preventing the engine from exceeding a predetermined override speed when the outlet of the diversion valve is communicating with the fluid actuated components thereby preventing damage to the pump if an operator accidentally depresses the accelerator pedal in the vehicle.

Abstract: A hot-gas engine in which the supply of fuel to the burner device is controlled by means of a control signal which is derived from a differential pressure signal which represents the volume flow of combustion air and which is corrected for variations in temperature and pressure of the ambient air.

Abstract: An exhaust energy extraction system for a multi-cylinder engine, comprising n axial flow turbine arranged to convert time-spaced exhaust pressure pulses into turbine rotor rotation. Output flow from the axial flow turbine is directed through a diffuser that converts velocity pressure to static pressure; a second radial flow turbine is operated by the steady state flow produced by the diffuser. Any tendency of the diffuser to exert an adverse back pressure on the axial flow turbine is counteracted by a pressure-responsive vent valve that establishes a ceiling on the diffuser pressure.

Abstract: A gravity engine converts one form of energy into another by using the expansion of a fluid medium to propel each of a plurality of bodies upwardly within one of a pair of adjacent vertical passageways. The expansion of a gas, such as steam supplied from a boiler heated by a solar panel, in a chamber and controlled by valves provides the force to propel the bodies against the force of gravity upwardly to the top of the first passageway. A guide directs the bodies from the top of the first passageway to the top of a second passageway wherein the bodies are stacked so that their combined weight acts upon a pocketed drive wheel at the bottom of the second passageway. The drive wheel is coupled to means such as an electrical generator to convert at least a portion of the potential energy of the stacked bodies into another form of energy. The pocketed wheel may also drive a pump used to return condensate water from the engine case to the boiler. The pocketed wheel carries the bodies, e.g.

Abstract: An installation and a method for the production of energy which utilize a source of heat or natural thermic differences are described. A first container contains a fluid in the liquid state and is capable of transmitting the heat to the fluid, a second container being used for holding the fluid after completion of the thermodynamic cycle and after it has returned to the liquid state, the second container being at a temperature lower than the temperature which prevails in the first container. Conduit means for connecting the first and second container are provided. The fluid has a low boiling point and is capable of undergoing a change from the liquid to gaseous state. A turbine or equivalent device is provided to utilize the kinetic energy of the fluid and transform this energy into mechanical energy; the fluid is converted from the liquid to the gaseous state upon entry into this device and returns to the liquid state in the interior of the second container.

Abstract: A thermal power plant of the type in which excess energy produced by the plant during off-peak load periods is used to produce compressed air which is then accumulated in a storage tank. The compressed air is withdrawn from storage during peak load periods and delivered to a hot air turbine for generation of additional energy. A heat exchanger is incorporated in he compressed air line leading from the storage tank to the hot air turbine and steam is supplied to the heat exchanger for heating the compressed air prior to delivery to the hot air turbine. Heating steam can be produced by electrically heating water in a storage tank or it can be constituted by bleeder steam taken from an auxiliary steam turbine facility, or it can be taken from a steam storage tank.

Abstract: Aquatic sports zones are reclaimed or made by bounding non-shore areas of the zone with a plurality of end-to-end connected water impervious flotation boom sections, anchoring the formed boom in the bound zone, and attaching the ends of the boom to pier bulkheads, and providing the boom with a ballasted skirt having a length greater than the maximum normally anticipated water depth at the point of attachment of the skirt to the boom. Where desired, water purification means may be included in the bound zone.

Abstract: The swell of a body of water is abated by dissipation of its hydraulic energy in response to variations of water head under the crest and under the trough of the waves. For this purpose, an enclosure is toto submerged in this body of water. It has on the one hand orifices designed to allow only a one-way flow of water upon exertion of a differential pressure of given sign, and on the other hand restricted or throttled passages designed to produce duct losses upon traverse thereof by water.

Abstract: A bail type expansion anchor for mine roofs and the like including a threaded bolt, and expander cone nut, and an expansible shell assembled together, with the shell formed from an integral blank of sheet metal having a pair of initially flat rectangular leaves bent to semi-cylindrical configuration with side edges thereof in abutment with each other to define a complete cylinder and having a bail strap of U-shaped configuration extending upwardly from the leaves and along side the cone nut. The bolt is threaded through the cone nut with the cone nut extending between the leaves of the shell, and the bail portion of the shell includes a circular top portion having a pop-out center having an interrupted circular periphery of slightly larger diameter than the bolt aligned with the bolt and connected to the remainder of the bail by frangible uncut attachment sections, designed to be broken out from the bail upon predetermined rotation of the bolt and form an aperture for passage of the bolt therethrough.

Abstract: A method for lining chambers and galleries, especially mining and tunnelling galleries, employs resilient steel supporting frames which consist of a number of box-like section segments capable of being slid one into another and which thus, at least in the zone of overlap, constitute a closed tube. The ends of the overlapping segments are widened or compressed, as the case may be, and then inserted one into another. Each overlapping outer section segment is then mechanically compressed in the region of the overlap until ears of the so compressed segment grip behind flanges of the overlapped inner section segment. A self-locking wedge system providing means of restraint or braking is inserted between each two overlapping outer and inner section segments, and a leading tie and a deformation tie are fitted at the overlap region to the respective ends of the overlapping outer and inner section segments.

Abstract: The invention relates to a hollow auger and to a method for producing piles cast in the ground. The method is characterized in that one uses an auger provided with a removable cutting head and which is able to slide in a sealed manner in the blade support tube of the auger and in that the injection of concrete, taking place through a central passageway provided in the cutting head, is undertaken in two successive stages, a first stage in which concrete is injected into the support tube by progressively raising the cutting head to a predetermined level, namely zero level in the latter and a second stage in which the auger is raised from the drill-hole by exerting a constant pressure on the cutting head and by injecting concrete in order to maintain this head at the predetermined level. The invention has application in the manufacture of piles cast from concrete.

Abstract: A machine for laying continuous concrete pipe in an open trench. The machine has interior and exterior pipe forming molds about which fresh concrete is poured. Reciprocating flexible diaphragms compact concrete poured in the trench adjacent the trench bottom to prevent the formation of voids without causing vibrations. The exterior mold has surfaces in continuous contact with side walls of the trench to thereby guide the mold aong and center them with respect to the trench. The interior mold includes a plurality of arcuate forms which remain in place after the pipe has been formed until the concrete has hardened. The forms are spread apart so that the finished pipe is slightly oblong in a horizontal plane.

Abstract: A subsea riser system for conducting petroleum or other fluid from the ocean floor to a floating loading and storage terminal or other facility at the water surface. The bottom end of the riser is connected to a subsea base by a hydraulic connector, and the lower portion of the riser is supported in tension between the subsea base and a submerged tension leg platform. The portion of the riser between the submerged platform and the floating terminal is flexible to accommodate relative movement between the platform and terminal, this flexibility accomplished by means of a series of pipe swivel joints spaced along the riser.

Abstract: A marine structure having a conductor adapted to receive a flow of fluid from a subsea pipeline. Said structure includes means to facilitate engagement of the fluid conductor with the pipeline, by means of a provisional conductor. The latter is pivotally connected into the structure during the building stages in a manner to permit adjustment thereof after the structure has been submerged at a working site.

Abstract: Pipes which are to be inserted vertically into the sea bed for the extraction of fluids therefrom, such as liquids and gases, are connected together in groups, with each pipe group being constructed on shore and then supported horizontally by the water while it is being moved to a platform site. The pipes are then flooded to turn the pipe package to a vertical position and the package is then connected with a platform by being engaged in a receiving groove in the platform edge. The pipe packages are then driven vertically into the sea bed and can then be fixedly connected to the platform and suitable connections made thereto for the flow of fluids upwardly in the sea bed through the pipe packages to the platform.

Abstract: An absorption refrigeration system having a primary condenser-generator unit powered by solar energy, or any other suitable relatively low temperature energy source. A secondary condenser-generator unit is operatively connected to the primary unit. The secondary unit is powered by a refrigerant circuit arranged to move the heat of condensation developed in the secondary condenser into the secondary generator. The secondary condenser-generator unit is used to either augment or supplement the primary combination.

Abstract: An absorption refrigeration system utilizes a solar collector in the heat input circuit.

Abstract: Liquid ammonia at a temperature of approximately -28.degree. F has its temperature raised to a level more suitable for transporting it, e.g. 40.degree. F, by passing it in heat exchange relation with higher temperature ammonia vapor which results from passing a liquid, such as water, from a waste heat source, in heat exchange relation with the ammonia, the vapor then condensing and the condensate returning to the heat exchange relation with the water, controls being provided to avoid inadvertent freezing of the water.

Abstract: A system for transferring a volatile liquid such as a fuel into a tank, from a storage facility. A nozzle sealably and removably engages the tank to pass a flow of liquid to the tank, and to return vapors therefrom to the storage facility. The fuel passing to the nozzle is chilled in accordance with the pressure in the storage facility, whereby to maintain a vacuum in the storage facility and therefore at the nozzle tank interface.

Abstract: A system for filling vehicle tanks with low pressure liquid carbon dioxide. A holding chamber is supplied with high pressure liquid CO.sub.2 from a storage vessel system, and the pressure of liquid CO.sub.2 is reduced to about 60 psig or below to create CO.sub.2 vapor and CO.sub.2 snow and form a low-temperature coolant reservoir in the holding chamber. CO.sub.2 vapor from the chamber is compressed and returned to the storage vessel system. Liquid CO.sub.2 from the storage vessel system can be supplied simultaneously to several vehicle tanks at below about 125 psig, and vapor created as a result thereof is condensed by melting CO.sub.2 snow in the holding chamber. Standby cooling of vehicle compartments is provided by vaporizing liquid CO.sub.2 from a vehicle tank in a heat exchanger for vaporization therein, expanding the vapor to cool it and then passing the expanded vapor through a second heat exchanger.

Abstract: Loose particulate material to be frozen is supplied to a rising current of refrigerating fluid such as cold air. The velocity of the refrigerating fluid is such that the particulate material to be frozen is supported dynamically, or substantially suspended, by the refrigerating fluid so that the particulate material to be frozen settles slowly through the rising refrigerating fluid, or is slowly transported by such refrigerating fluid either upward or translationally. The refrigerating fluid may carry the material to be frozen through successive freezing chambers through which the refrigerating fluid rises. Such chambers may be vertical or may be inclined upwardly.

Abstract: A movable ice receptacle for use in a refrigeration apparatus having a refrigerated cabinet defining a space within which the receptacle is normally disposed and which is selectively closed by a movable closure. The receptacle is mounted for selective disposition in a rearward ice storage position and a forward ice access position. The mounting of the receptacle is such that, when the closure is moved to an open position, the receptacle is correspondingly repositioned forwardly from the storage position to the access position. The receptacle may be gravity biased toward the forward ice access position and urged against the bias thereof by structure associated both with the closure and the receptacle to move the receptacle to the rearward storage position as an incident of the closure being disposed in the space-closing position. The mounting structure may be arranged to swingably mount the receptacle for movement in an arc. The storage position may be at a level above the level of the access position.

Abstract: An integrated controls assembly for controlling fluid flow between first and second heat exchangers and a compressor in a heat pump, air conditioner, or like system. The integrated controls assembly includes an accumulator in the form of a tank communicating by conduits with the discharge outlet and the suction inlet of the compressor. The conduit leading from the discharge outlet includes a coiled section contained within the accumulator and leading to a reversing valve assembly, also contained within the accumulator. The reversing valve selectively directs the gas flow from the discharge outlet to one or the other of a pair of conduits leading to the heat exchangers and simultaneously directs the flow from the other heat exchanger to the interior of the accumulator and therefrom to the suction inlet of the compressor. Shifting of the reversing valve will reverse the flow of refrigerant through the heat exchangers.

Abstract: An HVAC system for a building of the type that has an interior zone and a perimeter zone includes an economizer type air conditioning unit for the interior zone and a multi-source heat pump for the perimeter zone. The interior zone economizer type air-conditioning unit has a waste heat recovery coil disposed at the exhaust air dampers and connected in a closed liquid circulating loop for recovering heat from the exhausted air. The multi-source heat pump functions as an air-to-air heat pump during a cooling mode of operation during which heat is withdrawn from the air to be conditioned by standard indoor evaporator coils, said heat being rejected to the outside air by a standard outdoor condenser coil. The heat pump operates as liquid-to-air heat pump during the heating mode of operation during which heat is extracted by a chiller from the closed liquid circulating loop and is discharged to the conditioned air through the indoor coils which act as condensers during the heating mode of operation.

Abstract: An air-conditioning apparatus, of the room air-conditioning type which can be easily installed at any desired location in a room, as in a window therein, comprising a cabinet structure, a cabinet insulation structure and a partition board dividing the interior of the cabinet into an interior compartment and an exterior compartment. The insulation structure consists of right side, left side, top and bottom insulation boards. The insulation structure and the partition board are all made of plastic insulation material, such as polystyrene resin foam. Each insulation board has a plurality of projections and grooves corresponding with each other and with portions of the refrigeration components, such as the condenser and the evaporator, so that these components are fixedly interposed therebetween, when assembled.

Abstract: A working fluid such as a liquifiable gas is rotated in a rotor having a thermodynamic compressor, a condenser chamber and an evaporation chamber. The high pressure zone in the condenser chamber is separated from the low pressure zone of the evaporator by a column of liquid. In several embodiments, a fore-pump is actuated by the thermodynamic compressor in order to vary the thermodynamic operating points of the device.

Abstract: A flat knitting machine based on a flat Vee-bed arrangement has four opposed needle beds comprising front and back main needle beds and front and back auxiliary needle beds located above the main beds. A carriage traversible the length of the beds includes a cam assembly for imparting knitting and loop transferring motions to the needles in all the beds. By selective co-operation of the several beds flat and tubular knitted fabrics of any known design can be produced.

Abstract: A pattern mechanism for a flat knitting machine, has pattern sinkers lowered into and raised from the needle bed by pattern levers, or pattern sinkers movable in the direction of needle movement, the pattern levers, or the pattern sinkers movable in the needle direction having feet in staggered formation. At each passage of a selection point on a cam means, the pattern levers are lowered to the needle bed and held in, half in, or fully out in accordance with the particular pattern by strip-like control members, or the pattern sinkers movable in the needle direction are controlled by lifting members. The control members are on levers in the cam means movable by respective eccentrics, or cams, or by the pattern lever feet between two of the feet located successively in the direction of movement of the cam means and are retained in selected positions by electromagnetically controlled levers.

Abstract: A new method of selecting knitting needles of a straight knitting machine by scanning a program carrier; producing sampling pulses; taking electric signals obtained as a result of said scanning; storing in a temporary storage a preset number of digital electric signals; reading out, in a cyclic manner, said preset number of digital electric signals in response to carriage movement; and selecting needles according to contents of said preset number of digital electric signals to be cyclically read out, is provided. An improved straight knitting machine to put the new method into practice is also provided. With this new method and the improved straight knitting machine, it has become possible to simplify a recording of the profile indicating the unit pattern and to knit a pattern having a desired profile and size.

Abstract: A method for manufacturing panty hose or like fabrics including two leg portions and a panty portion integral therewith, the leg portions being knitted as tubular portions by continuous rotary motion of a needle cylinder or needle cylinders of a circular knitting machine and the panty portion being knitted by reciprocatory motion. Knitting of the panty portion included inactivation of a number of needles, knitting a first part of constant width formed by partial courses defining selvedge edges at their ends, knitting a central part by firstly narrowing and widening like a heel and then newly narrowing and widening, and knitting a second part of constant width formed by partial courses defining selvedge edges at their ends. The fabric is then cut to define the waist opening and the two parts of constant width are sewn together along the corresponding selvedge edges.

Abstract: A warp knit fabric which is stretchable in the direction of the wales by virtue of elastomer yarn forming the wales is made ravel resistant when cut in a transverse direction, by having a plurality of ends of elastomer yarn form each wale, with each yarn end having alternating knitted and laid in portions, each for a succession of stitches, the knitting and laying in of one yarn end being out of phase with the knitting and laying in of another yarn end. The wales are interconnected by inelastic yarn to form the fabric.

Abstract: A method of, and apparatus for, flexibilizing or softening leather or like materials wherein opposite marginal regions or lines of at least one area section of the piece of material to be worked and extending at least partially over such piece of material are moved periodically in relation to each other. This relative movement comprises or consists of a movement component directed parallel to the plane of said piece of material. This can be achieved by means of at least two tools moved appropriately in relation to each other and acting on the material by imposing an alternating deformation thereon comprising a movement component parallel to the plane of the piece of material.

Abstract: The invention comprises a machine for the continuous processing of leather hides using a table board which is fed lengthways through at least one pair of processing tools lying parallel and opposite to each other. The leather hide to be processed is placed with its middle part around the front edge of a table board. The machine includes means for displacing with respect to the table board, the unprocessed middle strip of hide on the front edge of the table board, to permit it to be processed.

Abstract: A press comprises two cooperating endless belts each trained over a support and tensioning roller. The end supports of the support roller for the lower belt rest on a hydraulically actuated piston which enables this support roller to be displaced towards the other support roller. Two pairs of like bracing members hold the end supports of the support rollers, the bracing members of each pair having one end pivoted to a respective hydraulic cylinder for the pistons and the end supports of the other support roller being detachably fixed to the other bracing member ends. Each pair of bracing members defines a guide for the displacement of the end supports of the support roller for the lower belt. One of the end supports of each support roller is pivotally mounted for pivoting the support rollers in a plane defined by the axes of the support rollers.

Abstract: A lockset of the type having a bolt reciprocal from and to a door edge by an operating mechanism including a crank hub and locks at opposite door faces has tubular torque blades between the locks and crank hub for transmitting rotative motion from the locks to the crank hub and ultimately to the bolt for the bolt reciprocations. Both of the torque blades have tubular inner ends of D-shaped cross section with one extending axially a major part of a crank hub D-shaped cross section axial opening and telescoping the other within the crank hub. Outer enlarged tubular ends of the torque blades are telescoped by ends of lock plugs of the respective locks and have partially circumferentially extending slots formed therein receiving radial tongues of washer-like members positioned circumferentially over the lock plug ends. Thus, the torque blade inner ends are single position, rotative drive connected to the crank hub and outer ends thereof are lost motion drive connected to the locks.

Abstract: A combination lock which employs a plurality of dials and respective sleeve eans for each dial has a pivotally mounted bolt member related to the sleeve means so that the bolt member may be pivoted to respective "on combination" and "off combination" positions. A latch member cooperable with the bolt member is mounted for sliding movement in a direction which is perpendicular to the longitudinal axis of the shaft upon which the dials and their respective sleeve means are mounted. Cooperable means are provided by the bolt member and the latch member to block movement of the latch member toward release position when the lock is "off combination". The latch member is provided with means to allow by-passing the bolt member and movement of the latch member to release position when the lock is "on combination". The combination lock is particularly suited for briefcases or the like.

Abstract: Combination lock for the control of the retraction of a lock latch comprising a multiplicity of notched members each displaceable as a function of a numeral or number in the combination, in order that, upon display of the right combination, the notches are aligned with a device for retracting the latch, characterized in that said device comprises means such that, by acting on a same member for instance a button, in a first phase the rake can be moved towards engagement with the notches then aligned, and in a second phase the driving of the latch in a retraction movement can be ensured.