Abstract: The present invention is an improved serpentine heat exchanger. Two metal sheets are crimped together, sealed at their abutting edges. The sheets have matching depressions which from a serpentine air passageway. Within the passageway are elongated ribs and column like dimples which serve as obstruction to the air flow, directing fluid flow over under-utilized portions of the passageway and generating turbulent fluid flow near heat transfer surfaces.

Abstract: A fitting consisting of a cap having a tube projecting radially or along the longitudinal axis of the injector, for connecting the injector supply tube, the cap being fitted in idle and fluidtight manner, via the interposition of an O-ring, on to a union on the injector; and a pair of coaxially-mating half rings fitted in axially integral manner partly on the cap and partly on the union, and held together by a retainer ring snapped externally on to the same.

Abstract: The present invention discloses a method of compensating for a restricted intake in a two stage furnace. The furnace includes low and high pressure switches for determining if sufficient air is present to support low and high combustion. When the furnace operates at high combustion, the state of the high pressure switch is monitored to determine if the high pressure switch has changed state for a predetermined amount of time such as 15 seconds. The inducer fan is switched to low when insufficient air for high combustion has been indicated for such a predetermined time. If the state of the low pressure switch indicates that insufficient air is available for low combustion, then the inducer is turned on high.

Abstract: The present invention relates to an arrangement for a door intended, in conjunction with the closing of same, to prevent injury by crushing between the door leaf (4) and the case (2). The arrangement (1) comprises a body component (5) with a plane surface (7) intended to be mounted against the door leaf (4). A longitudinal locking component (6) is pivotally mounted in the body component (5). A spring (9) acts between the aforementioned body and locking components (5, 6), which have devices which define a relative angular position. This means essentially that the direction of longitudinal extension of the locking component (6) forms a normal to the plane surface (7) of the body component (5). The spring (9) forces the components (5, 6) to adopt the aforementioned angular position.

Abstract: An air-cooled internal combustion engine includes a crankcase, a crankshaft disposed within the crankcase and extending externally thereof, and a cylinder extending from the crankcase and having a piston mounted for reciprocation therein and connected to the crankshaft. A cylinder head is connected to the cylinder and includes an overhead camshaft disposed therein, with the camshaft extending externally of the cylinder head. A drive pulley is mounted to the crankshaft externally of the crankcase, and a cam pulley is mounted to the camshaft externally of the cylinder head. A drive belt positively engages the drive pulley and the cam pulley for transmitting rotary motion therebetween. The cam pulley includes integral fan blades for directing air axially toward the cylinder head upon rotation of the cam pulley. The cylinder head includes an intake valve, an exhaust valve, and an air passageway extending therethrough substantially parallel to the camshaft.

Abstract: In a magnetic recording medium, three sorts or more of magnetic patterns being different in the coercive force are combined corresponding to information, and the magnetic pattern with high coercive force is previously magnetized in required direction and the magnetization direction provides a part of the information. In this constitution, the codes for discriminating truth or falsehood of the card cannot be easily deciphered by a magnetic viewer on the market thereby the security can be improved.

Abstract: A heat exchanger for an air heating and cooling apparatus includes a plurality of exteriorly-finless hollow refrigerant-carrying stainless steel spirally wound coils being of flattened oval shape in cross-section and a plurality of angularly-spaced criss-cross grid-forming structures for supporting the coils in spaced-apart relation and aligned in columns and rows in a stack thereof for permitting passage of external air flow across and between the coils. The spirally wound coils are supported by the grid structures to have an annular-shaped configuration defining an open interior in the coil stack core.

Abstract: The coating device features a first applicator which, to begin with, forces coating substance applied on the shell of a web roll (1), in a press gap formed between said roll and a press roll (2), into the web (W), thereby impregnating it. This makes it possible to apply with maximum uniformity and without web breaks and wrinkles, immediately successively, a second coating layer during the still wet condition of the first layer where, naturally, again a web guide roll (3) is provided.

Abstract: An apparatus for grinding and precooking grain includes a housing that contains grinding disks, a hopper for input of the grain, a worm screw, and an output tube for the flour, wherein the housing defines a hermetic chamber inside which the vapor produced by friction while grinding is accumulated. A tube is provided from the hermetic chamber to capture the vapors and lead them to the tube through which the grain enters in order to precook it. The grinding disks have an alternating disposition of channels and reliefs in order to capture the vapor and lead it to the center of the disk through which the grain enters and return it to the input tube communicating with the hopper through the worm screw.

Abstract: A wrap for a flower pot comprises a sheet of material formed into the shape of a flower pot and having a pair of matching rings trapping the material between them at a location which, in use, will be adjacent to the upper margins of a flower pot. There is also disclosed a method of forming a flower pot wrap in which a first ring is placed on a mandrel having the shape of a flower pot, a sheet of material is placed over the mandrel and a second ring is moved over the sheet about the mandrel to engage the first ring and trap the sheet between the two rings.

Abstract: A process for the manufacture of a fuel manifold designed to supply fuel to a number of fuel injectors includes forming the end of each of a number of cup shaped fittings into a rod having an axial hole, forming on an elongated semifinished metal part a series of seats for the aforementioned rods, inserting the rods inside the seats an permanently deforming the rods against the respective seats for securing the fittings to the semifinished metal part.

Abstract: A safety brake system for a walk behind lawn mower in which provision is made for alternative orientations of the engine relative to the mower deck and operator's position while utilizing the same components for the safety brake system. Only the interconnection of the components is changed for the alternative engine orientations. In one configuration, a control lever connected intermediate an operator actuated bowden cable and the brake disengagement device is pivoted between the attachment points of the control lever to the bowden cable and the disengagement device such that a reverseal of direction of pull is effected. In the other configuration, the point of attachment of the control lever to the disengagement device is on the same side of the pivot point of attachment to the bowden cable such that no reversal of direction of pull occurs.

Abstract: In a field effect transistor, nonalloyed ohmic source-drain contacts (7, 8) are made possible, as the channel layer (3) is coated with lanthanide-arsenide which serves as contact-mediating layer and is covered with a very thin, conducting, monocrystalline, epitactic gallium-arsenide layer (10) on which nickel (11) is vaporized, an alloying step being dispensed with.

Abstract: An apparatus for forming a high quality film at high speed includes a wafer susceptor provided wiht a vacuum exhaust system, a stock gas supply system, and a heating mechanism for directly heating the susceptor. A ceramic filter means is disposed in opposite juxtaposed face to face position relative to the wafer susceptor for blowing stock gas in a uniform manner against a wafer. Means for activating the stock gas is provided to thereby increase the probability of adsorption of the stock gas on the wafer surface.

Abstract: A mounting apparatus for the sonic transducer of a directional Doppler fish-finder includes an elongate tubular control arm and a clamp assembly for attaching the control arm to the side of a boat so as to extend along and pivot about a generally vertical axis. The upper end of the control arm includes a pivotally mounted control lever, and the lower end includes a pivotally mounted transducer mounting plate to which the transducer is attachable. The control lever and the mounting plate are interconnected by a pair of cables extending through the tubular control arm, whereby pivotal movement of the control lever causes pivotal movement of the mounting plate about a generally horizontal axis. Pivotal movement of the mounting plate about both the vertical and horizontal axes enables a fisherman to direct the sonic signal of the transducer in a locus of directions representing semispherical coverage of the water about the boat.

Abstract: A barbell including a spring handle mounted on the bar of said barbell whereby the user may force the handle outwardly against the urging of said spring. The barbell includes a bar, one or more weighted discs mounted on the bar and a safety lock for preventing the discs from sliding off the bar. A locking ring is secured to the bar adjacent the discs. One end of a spring is secured to the locking ring. The other end of the spring is secured to a handle. The handle is axially moveable against the urging of the spring for compressing the spring. A detent is also provided on the bar to define an end position of the handle.

Abstract: A commercially advantageous process for producing m- or p-aminobenzylamine is provided, which is characterized by subjecting m- or p-nitrobenzaldehyde and ammonia to catalytic reduction in the presence of a reducing catalyst in an organic solvent; in the reduction, when nitrobenzaldehyde and ammonia are in advance made a mixed solution in an organic solvent, and this solution is added in divided manner, the yield being further improved.

Abstract: An arrangement for a snap lock includes a first component having a projecting part that is capable of being introduced into a corresponding cavity in a second component. An indentation in the projecting part is oriented transverse to the direction of introduction into the cavity. A snap device, e.g., a piece of profile strip made of flexible material such as plastic or rubber, is introduced into an undercut groove in the wall of the cavity, wherein a portion of the strip corresponding to the indentation extends into the cavity, thereby producing a snap locking function between the components when introduced one into the other. The components are preferably formed of pieces cut to identical lengths from two extruded profile strips made of rigid material, such as plastic or light metal.

Abstract: A compression release mechanism for an internal combustion engine wherein a rotatable pin positioned axially parallel to the camshaft is rotatably received in the camshaft lobes, and has an auxiliary cam surface mounted at an axial end thereof. The auxiliary cam surface is adapted to extend above the outboard camshaft lobe to engage one of the valve lifters to thereby activate a compression release valve when the rotatable pin is rotated to a first position in response to low engine speed. The pin is rotated to a second position in response to high engine speed whereby the auxiliary cam surface is adapted so as not to engage the valve lifter. The pin is rotated by means of a centrifugally activated flyweight in response to engine speed.