Abstract: A building unit of generally diamond shape which includes flange members along its edges, the flange members adapted to interlock with those of an adjacent unit to construct a building structure for example a dome structure. The units are simple to manufacture and assemble to provide inexpensive domes and other structures.

Abstract: A wall structure and a method for producing the wall structure. The wall ucture is comprised of substantially standardized building elements which, one preferred embodiment, interlocks with adjacent elements along both the top and bottom and the vertical side surfaces. The surfaces of the building elements forming the interior and exterior surfaces of the finished wall are preferably reinforced along one such surface thereof. During the formation of the wall structure, horizontally and vertically aligned grooves are provided in the completed wall to facilitate the location at which severing should occur as well as to facilitate the severing of the reinforcing members to permit selected sections of the wall to be simply, readily and inexpensively removed. In one embodiment, the reinforcing members may be steel plates while in another alternative embodiment, the reinforcing members may be comprised of horizontally and vertically oriented elongated reinforcing rods.

Abstract: An anchoring system for use in anchoring structures such as mobile homes to the ground by use of elongated flexible belts. The belt is wound so as to be firmly clamped by its own tension.

Abstract: A horizontal array of first elongated electrodes are embedded in a foundation wall above the footing level. A second elongated electrode is embedded in the footing directly below the center line of the first array, and extends diagonally downward in the footing. A rectifier circuit, having an AC input permanently connected to the AC mains, has a positive output terminal connected in parallel to all of the first electrodes and a negative output terminal connected to the second electrode. With such arrangement, the DC current path established when an upward capillary flow of soil moisture reaches the level of the first electrodes is effective to provide a hydrofuge barrier to the capillary flow.

Abstract: A coated glass glazing system is presented including a transparent glass substrate having one surface coated with a radiation absorptive film which is overcoated with a radiation reflective film by a technique which renders the radiation reflective film radiation absorptive at the surface contacting the radiating absorptive film. The coated glass system is used as glazing for storm windows which are adapted to be reversible so that the radiation reflective surface may be exposed to the outside of the dwelling during the warm seasons to prevent excessive solar radiation from entering a dwelling and reversed during cold seasons to absorb solar radiation and utilize it to aid in keeping the dwelling interior warm.

Abstract: A computer cable shroud assembly consisting of peripheral members having a cavity for receiving interlocking strips. The interlocking strips are cut out to accommodate the passage of individual cables. The computer cable shroud assembly can be assembled in the field and can be used with existing cables without having to sever or otherwise disturb the cables. A computer shroud assembly with knock-out ports can be used when it is necessary to permit and control the flow of cooling air from the under floor plenum to the above floor area.

Abstract: The disclosure is of a wall tie for tying together spaced panel units on opposite sides of a wall, the wall tie comprising two elongated extremities to engage in guide grooves in the respective panel units, the said extremities being interconnected by web portions having serrated edges and adapted to fit into complementary recesses in insulating elements and so maintain these elements in position inside the wall against both vertical and horizontal displacement.

Abstract: A molding clip having a clamping portion with barbs for gripping and anchoring to a panel and having a molding retaining portion with barbs for anchoring a molding wherein the retaining portion is adapted to be deflected to a large degree by the molding to establish anchoring thereof in one application and to a much lesser degree to establish the anchoring in another application of the same molding.

Abstract: A method and apparatus for fastening an object, such as a board to which another object may be fastened, to a clay tile roof utilizes rod threaded at both ends with a wing expansion nut on one end that is passed through a hole drilled in the tile and supporting wood at a wing point where the tile rests on the wood. A rubber washer backed by a metal washer and nut seals the hole in the clay tile and secures the rod in an upright position. A washer and second nut at the other end of the rod then secures the object to the roof with the object spanning the ridge points of two or more tiles. A third nut locks the second nut on the rod, and allows the rod to be turned like a bolt to drive the excess rod into the roof. To facilitate installation, the rod is preferrably threaded from end to end.

Abstract: A machine for sealing food containers is disclosed which includes a horizontal base and support means attached to the base for supporting a container to be sealed. A ring is attached to the support means which ring has a first indentation forming a concentric circle with the ring and on the surface of the ring. A second indentation lies within the first indentation. A first horizontally extending arm is pivotally linked to the base for allowing vertical movement of the arm. A vertically extending arm is attached to such first horizontal arm and extends downward and is centered within the ring. A disk is attached at its center to the vertical arm. Such disk has a diameter greater than the inside diameter of the ring but less than the outside diameter of the ring. A vertical sleeve encircles the vertically extending arm and is rotatable about such vertical extending arm. A second horizontal arm is attached to the vertical sleeve and is also rotatable about the vertical arm.

Abstract: A needle attached to a valve construction is employed to cut a core from the wall of a tennis ball. A bore in the needle tip receives the core and carries it into the interior of the ball as the needle is inserted until an orifice in the side of the needle is within the ball. Gas is released from an aerosol container into a chamber within the valve construction and then into the ball through the needle orifice. A piston is disposed in the chamber and a helical spring exerts a bias force on the piston normally urging the piston toward the needle and permitting gas flow to the needle. When the pressure within the ball reaches a preselected level the piston moves away from the needle and activates a valve which shuts off the flow of gas. An indicator button external to the valve housing moves with the piston to indicate that the preselected pressure has been reached. The needle is then withdrawn from the ball leaving the core to reseal the hole.

Abstract: A method of sealing containers is disclosed in which a glass jar having a small upwardly convex bead on its rim is filled and sealed using a metal foil membrane with a heat seal resin on its undersurface and a plastic snap cap having a material thickness over the bead on the jar of at least twice the height of the bead. The foil membrane is induction heated while high unit pressure is applied against the top of the snap cap to impress the bead on the jar and foil membrane into the plastic of the cap to form the foil membrane over the convex surface on the bead and seal the membrane to the jar.

Abstract: Apparatus for wrapping an article with stretch film. The article is first advanced against a vertical web of film to partially enfold the film longitudinally about the article and to advance the article to a longitudinal folding station where a tail of the film is folded up against the bottom of the article and at which film wings laterally project from the article. The partially wrapped article is then advanced to a stretch and lateral fold station at which the film wings are clamped by clamping jaws which are moved laterally away from the article whereby to stretch the film. The article is then lifted and the clamping jaws are advanced toward each other and beneath the bottom of the article whereby to fold the wings at least partially against the article while maintaining stretching tension on the film. Thereafter, the article is advanced through a plow to complete the wrapping of the wings against the article.

Abstract: An adjustable rope halter for horses and a kit for assembling the halter. The halter is formed from a single length of rope shaped to form a headstall having a headband loop releasably engageable with a clasp. A noseband is defined by upper and lower nose loops and a lower jaw loop is engaged with a halter ring on the lower nose loop. The clasp is engageable with the headband for mounting the halter on a horse's head when the noseband is engaged with the horse's nose and the headband is passed around the back of the horse's head.

Abstract: A fully automatic self-propelled self-guiding lawn mower in which guidance of the lawn mower is based on the principal of a magnet following a passive ribbon or wire of ferromagnetic material. The lawn mower includes two drive wheels located on opposite sides of the vehicle. Each drive wheel is connected to a drive shaft on the vehicle through a separate solenoid controlled clutch and each drive wheel is equipped with a separate electromagnet controlled brake. The drive shaft is turned at a constant rate of speed by a battery powered electric motor. The guidance system for controlling the movement and direction of the lawn mower includes a rotably mounted bar magnet horizontally aligned with the longitudinal axis of the vehicle and fixedly coupled to an electrical contact wiper arm that traverses an arcuate array of radially extending electrical contacts.

Abstract: A tobacco harvester consisting of a mobile machine having a frame on wheels and which at the forward end supports rotary overlapping cutters adjacent the ground for cutting tobacco plants which are then deposited in a trough-like conveyor system consisting of a central conveyor and slanted side conveyors which are driven at a faster speed than the central conveyor to eliminate injury to the plants. The machine, cutters and conveyors are hydraulic driven from separate hydraulic motors actuated by a gasoline engine. The cut tobacco plants are carried rearwardly by the conveyor and manually hung individually on a lath which is located in a supporting shuttle assembly of bowed construction and then pushed rearwardly which brings forward another lath ready to be loaded with newly cut tobacco plants. Because of the bowed construction of the shuttle the laths pass without injuring the tobacco leaves.

Abstract: Device for regulating the height of the cutter platform of a combine harvester by its automatic return to an adjustable, predetermined height after lowering by a jack includes a rod which slides freely downwards causing an abutment surface to compress a spring which reacts through a double arm lever to reset a distributor valve, causing the jack to raise the platform.

Abstract: An apparatus for twisting together a first and second yarn has a frame extending in a longitudinal direction and carrying a row of upright spindles each having and rotatable about an upright spindle axis. A holder is carried on the frame above each spindle and in turn carries a pair of yarn supplies one which may be the first yarn and one the second, or both the first. When the holder carries both first and second yarn supplies the spindle is operated as a takeup spool and is provided with a traveling-ring arrangement, with the two yarns being pulled off the respective supplies and twisted together. When the holder carries only two supplies of the first yarn the supply of the second yarn can be carried on the spindle, and a separate takeup spool can be provided above the spindle and below the holder. This takeup spool is driven to take up the two yarns and the first yarn is fed from the holder down and then up through the hollow spindle to be twisted with the second yarn that is simultaneously being spun.

Abstract: A composite filament yarn made by plying untexturized cellulose acetate yarn with polyamide or polyester yarn is made more coherent by false-twist texturizing it. The increased coherence prevents bunching of the acetate yarn during knitting and so the associated shade variation is avoided. The acetate yarn is spun-dyed and the polyamide or polyester yarn is package-dyed after pre-texturizing. The acetate and synthetic yarns may be dyed to matching shades.

Abstract: An electronic timepiece including a global time display that is adapted to display local time when the timepiece is in a local time mode and is adapted to be automatically indexed to display a time at a different time zone when the timepiece is in a global display mode is provided. A plurality of numerical display digits are provided for displaying time information and a plurality of visual indication display segments are disposed about the numerical display digits for selectively indicating a predetermined time zone corresponding to the time displayed by the numerical display digits. The mode select circuitry is provided for effecting a display of local time by the display digits and a local time zone by the visual indication display segments when the selection circuitry is disposed in a global time mode.

Abstract: A wristwatch having a sound-emitting device or alarm therein includes a watch case, a cover glass and a case back. The sound-emitting device is mounted in the watch case from the back side in a mounting opening formed in the watch case. The watch case is formed with a sound-emitting aperture on the top surface over at least a portion of the mounting opening of smaller size than the mounting opening.

Abstract: A detachable link is disclosed having identical overlapping members secured together by a cylindrical pin. Lengths of chain can be joined quickly, and, when necessary, to be detached or separated from one another, quickly. One place where such detachable links find particular application is in a ship's anchor cable wherein the detachable links are used to join together shots or sections of chain.

Abstract: A combustor assembly for a gas turbine engine includes a tubular, multi-layered porous metal wall with pores therethrough for distribution of compressor discharge air into a combustion chamber and wherein a rigid combustor support ring is connected to one end of the wall to receive an inlet diffuser member including an ovate inlet and a circular outlet connected to the support ring for axially directing primary air flow into the combustion chamber; and the diffuser member including a flow divider on one outer surface thereof including means for fixedly securing the inlet diffuser member with respect to a wall of a gas turbine engine and wherein coacting means are provided between the inlet diffuser member and the rigid combustor support ring of the combustor to radially connect it in place at one end thereof and wherein further coacting means are provided between the inner engine wall and a portion of the porous sleeve for axially indexing of the combustor assembly.

Abstract: The heat exchanger elements, arranged in a ring around a compressor, gas bine and combustion chamber that have a common axis of symmetry, are supported on a framework having elastic inserts for compensating for or accommodating to thermal stresses and are so connected to an inner and an outer casing portion that free spaces for each of the heat exchanging media (hot exhaust gas and compressed air) are provided inside the unit communicating with the heat exchanger elements. Ducts for the hot gases are surrounded by cooler gases provided in these free spaces to reduce thermal stresses. The casing portions themselves provide some of the duct walls, so that a compact and sturdy unit is provided.

Abstract: In a combustor carburetor device having a secondary swirler which axially introduces airflow between the venturi and a splashplate, a cylindrical sleeve is inserted between the venturi and the splashplate to axially extend the air outer flow path. The cavity defined by the axial extension and the splashplate is then purged by a source of air such that the combination prevents the flow of fuel from the venturi to the surface of the splashplate to thereby reduce emissions during engine idle operation. At the downstream end of the cylindrical sleeve is attached a frustoconical portion which allows controlled dispersion of the fuel/air mixture for resultant improved ignition characteristics.

Abstract: The secondary air supply system of an internal combustion engine is provided with two reed valves through which atmospheric air is induced to the exhaust system of the engine. The two reed valves are selectively maintained operable under low and high engine speed operating conditions, respectively.

Abstract: A siphon motor comprising the combination of siphon means and generating means for generating electrical energy from a water source located below the generating means and a water discharge at a lower level than the water source. Water rises by siphonic action upward from the water source to a sealed working region maintained under partial vacuum, and descends to the water discharge. The working region contains the generating means. The system has particular utility as a source of power generation in remote locations having a water table within about 30 feet of the ground.

Abstract: Torque converter with a stator whose blades are selectively set at open and closed position to tailor converter operation for optimized vehicle performance and fuel economy. Turbine discharge pressure is routed to impeller side of stator control piston to move stator blades to low angle position for improved engine economy during vehicle coast down operation. Low angle stator is also used for economical anti-creep idle and for higher stall speeds and acceleration when needed. For economical cruising and other operation, the stator blades are set at their high angle or open position.

Abstract: A torque converter having an impeller incorporating blades having a negative outlet tip angle in the range of 20.degree. to 30.degree. to reduce the torque absorption capacity of the impeller at engine idle. The stator blades are set at a check angle in the range of 51.degree. to 53.degree. and have a sharp nose displaced circumferentially from the entrance flow of the stator thereby inducing fluid turbulence at the stator inlet during converter stall.

Abstract: A control system for a hydrostatic transmission is disclosed of the type including an engine driven fluid pump and a fluid motor. The control system includes a main control operable in response to an electrical command signal to vary the displacement of the pump, and a command signal generator for generating the command signal. The anti-stall control includes means for comparing electrical signals representative of engine speed and a reference speed, and generating an electrical anti-stall signal representative of the maximum percentage of commanded pump displacement which is permissible without causing the engine to drop below the reference speed. The anti-stall control includes means for electrically multiplying the anti-stall signal and the command signal, downstream of the shaping and rate limiting circuits. The invention provides a simple, inexpensive anti-stall control which can be adjusted to have the maximum possible gain (responsiveness) without inducing circuit instability.

Abstract: A method and apparatus for releasing for use, air that has been absorbed under pressure in sea water or in any other large free body of water. An elongated conduit, or equivalent means, is vertically disposed so that air released from its upper end is collected by an open-bottom container serving as a reservoir. The interface of the collected air and the submersion level of water within the reservoir is substantially below the free water surface level. A small amount of gas is introduced at the lower end of the conduit so as to rise upwardly through the conduit, thereby carrying water behind it, and to initiate a continuous process in which the rising water is under decreasing pressure, at times increasing temperature, thereby releasing more air, which in turn carries more water behind it, and so on. Air from the reservoir can be used as an energy source.

Abstract: A vehicle having a prime mover, a hydrostatic transmission transmitting power from the prime mover to ground engaging members on said vehicle, a power take-off arranged to be driven by said prime mover and clutch means for selectively engaging the power take-off with the prime mover. The vehicle also includes regulator means operable upon the transmission to maintain the power consumption of the transmission below a predetermined level, and compensating means operable upon the regulator means upon engagement of the clutch means to reduce the predetermined level of power consumption of the transmission.

Abstract: The invention consists of a differential temperature engine in which the return stroke is achieved independently of the contraction of the vapor which induced the initial movement of the moving member. The engine consists of a relatively cold and a relatively warm chamber which are sealed from the outside environment, and contain a low boiling point fluid. One end of a cylinder communicates with the vapors in the relatively warm chamber while the opposing end of the cylinder communicates with the vapors in the relatively cold chamber. When there is no communication between the cold and warm chambers a vapor pressure differential upon the opposing ends of a piston within the cylinder causes the piston to move towards the cold chamber. The return stroke of the piston is induced by equalization of the pressures upon the two opposing ends of the piston.

Abstract: The invention comes within the field of heat engines which operate by means of a fluid which flows in a closed circuit. A device characterized by the fact that the engine is placed in a sealed chamber and that its output shaft is coupled to a transmission shaft which does not undergo any bending stress, having a seal where the transmission shaft passes through the chamber, the seal being permanently in contact with a lubricant during operation and when the engine is stopped. The invention applies in particular to isolated low or medium power engine installations which require only slight supervision.

Abstract: In a cryogenic apparatus wherein the refrigerator has a reciprocable displacer which must be coordinated with fluid control means, such as a rotary valve, to control the inlet and exhausting of high and low pressure fluid, respectively, to produce cooling, an improvement is disclosed comprising including means for providing proper coordination between displacer movement and fluid control means regardless of the direction in which the motor drive shaft is rotated.

Abstract: An improved method and apparatus for air conditioning, using a refrigeration system, are disclosed. The disclosed method and apparatus provide for a refrigeration type air conditioning system to be equipped with a regeneratable desiccant for contacting moist feed air prior to passing the feed air across evaporator coils of the system. The desiccant removes a substantial portion of moisture from the feed air, thereby improving the efficiency of the air conditioning system. The desiccant material is regenerated by utilizing waste heat that is removed from the condenser of the air conditioning system.

Abstract: A positive displacement compressor, such as a helical screw rotary compressor without capacity control element, is coupled in a refrigeration loop main line between the evaporator and an oil separator and upstream of the condensor. To unload the screw compressor at low evaporator load, any refrigerant discharging from the compressor is bypassed by a line connecting the suction and discharge sides of the screw compressor, and main line connection from the evaporator to the screw compressor is shut off such that the driven, unloaded screw compressor pulls oil from the separator through a restrictor and oil injection port and some refrigerant vapor which passes to the evaporator side through the screw compressor bypass line. As the evaporator pressure increases, the evaporator is connected through a restrictor within the main line to the screw compressor suction.

Abstract: A spacer bar and spacer for prepackaged food freezers of the multiple flat plate type which enables the spacing between the plates to be quickly changed to accommodate different thickness food packages. The spacer bar has a plurality of pairs of parallel sides, each pair being spaced a different predetermined amount whereby, by selectively rotating each spacer bar, the spacing between adjacent plates can be quickly changed. A spacer plate is further provided for adjusting the position of the stack of plates relative to the loading and discharge openings to accommodate changes in the overall height of the stack of plates caused by the different plate spacings.

Abstract: A filter-drier for a heat pump system is installed in flow lines in which the flow of refrigerant is reversed when the system changes from the heating to the cooling mode. Two side-by-side filter-drier units, joined to the flow line by a pair of Y-connectors, are so installed with check valves at the inlet and outlet of each, to filter the refrigerant flowing in one direction through a low pressure filter-drier unit for the heating mode and to filter the high pressure refrigerant flowing in the other direction through the other unit, a more porous filter-drier, for the cooling mode. The outlet check valves permit refrigerant flow through only one filter, and the inlet check valves prevent entrainment, into the flow out of that filter, of contaminants previously trapped in the other filter.

Abstract: A universal joint for interconnecting two rotatable shafts comprises a first fork assembly, first and second fork half members, each having a first end with a cylindrical hub portion and an opposite wider end having bounding side wall flanges which are adapted to engage over a hub nut which is engageable over one of the shafts, the half portions being assembled around the hub nut and the shaft and being clamped thereto and a similar assembly of third and fourth fork members which are connectable to the other shaft in a similar manner and which also includes a cross link which has a first set of diametrically opposite rotational pins rotatably supported with respect to cylindrical hub portions of the first and second fork half members, and a second set of rotation axis pins rotatably supported in respective cylindrical hub portions of the third and fourth fork half members, and wherein the construction includes half forks which are advantageously made of U-shape cross section and comprise thin stamped metal sh

Abstract: A novel resilient torque-limiting coupling adapted to accommodate axial- and angular-shaft misalignment (e.g., between a driving shaft and a driven shaft), as well as offering a torque-limiting capability in a very simple construction.

Abstract: There is disclosed a method of manufacturing patterned knitted fabrics on a double cylinder knitting machine, in which the pattern jacks associated with needles in the lower needle cylinder having already picked up a yarn at any of the feeds but one thereof are brought into a position in which they can no longer be selected to bring the associated needles to knit in the same knitting course. Same occurs for the jacks associated with the needles knitting in the upper needle cylinder. All these jacks are then brought into a position capable of being raised on the jack raising cam associated with the remaining feed, but only those jacks are raised which are associated with needles knitting in the upper needle cylinder. The machine has a number of jack selecting devices which is by one unit smaller than the number of yarn feeds, and cams for causing the jacks to move as above described.

Abstract: Needles in knitting machines are selected for pattern purposes by a lever system operated by a pattern drum mounted on a carriage passable to and fro over the needle bed. The lever system incorporates locking-sinkers provided with contact feet in staggered relationship so that different force requirements apply to different ones of the rocking sinkers. The present invention provides an additional foot on the end of each rocking sinker and a cam element on the carriage to engage the said additional feet of the rocking sinkers selected by the pattern drum fully to depress the selected rocking sinkers whereby to ensure actuation of the selected needles.

Abstract: A method and apparatus for drawing and knitting yarn on a circular knitting machine which includes a needle cylinder, a sinker ring fixedly mounted on the cylinder and having a plurality of equally spaced, radially extending sinker grooves. Each groove contains a sinker having a step on its bottom surface adjacent the cylinder end of the sinker. The ring includes a well adjacent the needle cylinder and a shelf between the well and the sinker grooves. A cam occurs on the ring for sequentially moving the sinkers, one after the other, radially toward and radially away from the cylinder so that the bottom surfaces and steps on the sinkers engage the bottom surface and shelf of the sinker groove when the sinkers are moved radially inward to lower the needle cylinder end of each sinker and to raise the needle cylinder end of the sinker when the sinkers are moved radially outward. A guide is on the cam for engaging the sinker and guiding the sinker downwardly to engage the sinker step in the sinker ring well.

Abstract: A washing machine suitable for washing a washable dust mat comprises means for supplying a main wash liquid to each mat in turn from a tank, means for collecting at least the used main wash liquid and returning it to the tank, an overflow from the tank, means for employing the overflow of liquid from the tank in a pre-washing operation for each mat, and means for rinsing the washed mat. A single supply of water is thereby recirculated to provide the main wash liquid and also provides the pre-wash liquid.

Abstract: A press for squeezing out batch material, especially laundry, with an elastic pressure member which can be charged with a pressure medium, in a housing, and a conveyor belt for conveying the batch material from a loading station to a pressing station below the said pressure member, and to a discharge station after the squeezing is disclosed.

Abstract: In a certain form of key-operated padlock of generally curved contour with a flat bottom there is accessible from the bottom of the padlock body a generally rectangular crevice outlining the cavity in the body block which flushly receives the retainer block and cylinder. In the present invention the padlock body and the enclosed retainer block have mating and cooperating eccentrically shaped ribs and grooves which are effective in preventing unauthorized attempts at a tool insertion in the crevice surrounding the exposed end portion of the block sufficient to separate portions of the block and the enclosing padlock body, or to break out wall portions of the latter. Additionally, unauthorized disengagement of the retainer block from the padlock body is prevented by a pair of hardened pins which extend from the padlock body into the retainer block and are rotatably mounted in the latter.

Abstract: A single piece self-supporting shoe of generally oblong shape for use in a conduit bender. The shoe has oppositely disposed arcuately shaped outwardly facing grooves on opposite side portions and is capable of bending either thin or thick wall conduit of varying sizes, all with the same shoe by employing different radii in the opposed grooves of the shoe.BACKGROUND OF THE INVENTIONPreviously shoes for conduit benders for bending thin wall tubing or conduit and intermediate and rigid conduit depended for their operation upon either an internal pivot point support or upon internal access permitting the application of a sizable force therein such as is often produced by a hydraulic ram to drive the shoe. These internal structures of such shoes were integral with their function and tended to limit their design.

Abstract: A locking device for a bicycle or a corresponding lockable unit, which comprises a locking member swingable from a releasing position through a wheel of the lockable unit to a locking position and vice versa. A catch is provided to receive the free end of the locking member and a cylinder lock is attached to the other end of the locking member; and, in order to move the free end of the locking member into the catch and to remove it therefrom, the locking member has to be turned around a longitudinal axis. The swinging movement of the locking member between its locking and releasing positions is dependent on the turning position of the locking member so that the swinging movement can be carried out only when the locking member is in a certain turning position.

Abstract: A cylinder lock comprising a cylinder housing, a cylinder turnable therein, and in the cylinder, a plurality of locking discs turnable by the key of the lock. The locking discs are arranged in separated relation from each other by immovable intermediate walls in the cylinder. Thus, each locking disc has its own firmly fixed turning space.