Abstract: A heat exchanger is provided having first and second fluid chambers for passing primary and secondary fluids. The chambers are spaced apart and have heat pipes extending from inside one chamber to inside the other chamber. A third chamber is provided for passing a purge fluid, and the heat pipe portion between the first and second chambers lies within the third chamber.

Abstract: An air condenser for condensing vapors where freezing or solidification of the condensate is likely to occur. Finned tube bundles are used, which are arranged so as to form a primary condensation zone and a secondary condensation zone. The tube bundles are placed at a slope and are struck by an air stream coming from below. The innermost tubes are directly struck by the cooling airstream and make up the first condensation zone. The outermost tubes receive air which has been preheated since it has flowed through the first condensation zone. These outermost tubes make up the second condensation zone. Thus vapors which are not condensed immediately are condensed in the second condensation zone. The apparatus is a compact, self-contained and efficient unit which is cheaper than the prior art devices both as to initial cost and upkeep cost.

Abstract: A thermostat adapted for controlling heating and cooling apparatuses has a temperature control point adjustment means connected to a changeover switch means whereby upon the adjustment of the temperature control point adjustment means in a first range to select a cooling control point, the changeover switch means only connects the thermostat to the cooling apparatus and when the temperature control point adjustment means is in the heating range, the changeover switch means only connects the thermostat to the heating apparatus. The limited range of temperature selection in the first and second range is an energy conservation feature of the thermostat.

Abstract: A recuperator structure for recovering heat values from a hot gas stream comprising exhaust gases from a combustion burner supplied with combustion air for burning a fuel in which a heat exchanger is used for exchanging heat between the hot exhaust gases and the combustion air for preheating the combustion air and including a variable temperature control for selectively restricting the volumetric flow of either the air or the exhaust gases or both through the heat exchanger in order to control the temperature in the heat exchanger.One of the features of this invention is to provide a recuperator structure for recovering heat values by extracting heat in a heat exchanger from the hot exhaust gases from a combustion burner and using this heat in the exchanger to preheat the combustion air to the burner and including means for controlling the temperature in the heat exchanger by controlling the volumetric flow of either the combustion air or the exhaust gases or both through the heat exchanger.

Abstract: A sprinkler arrangement comprises a sprinkler head connected via a first valve to one end of a length of connection pipework adapted for attachment to a main pipework system containing fire extinguishant. A second valve is arranged at the other end of the connection pipework and comprises an inert plug which is maintained in a valve closed position by a strut which contacts the first valve. On opening of the first valve, for example when a predetermined temperature is reached, the strut is caused to move and thereby permit movement of the inert plugs to allow a flow of extinguishant into and through the connection pipework to the sprinkler head when the arrangement is attached to the main pipework system.

Abstract: An improved inflammable liquid safety tank comprising a double walled tank body with the tank walls being interconnected by support plates. An intermediate container is formed by the inner wall structure of the tank and is adapted to hold inflammable liquid. A pressurized gas bottle is threadably mounted to a sleeve secured to and extending into the intermediate container. The pressurized gas bottle is selectively connected to the intermediate container to pressurize liquid held in the intermediate container. The pressurized gas bottle also communicates with the tank to pressurize a foam, nonflammable fluid, or cleaning agent placed in the chamber or outer compartment defined by the outer wall structure of the intermediate container and the inner wall structure of the tank body so that the foam, fluid or agent will be expelled from the tank if the tank wall is accidentally punctured. The outer compartment is preferably pressurized at a lower pressure than the intermediate container.

Abstract: A gardening tool with a long handle, having a small flat planar portion disposed at approximately right angles to the handle and connected to the handle by a semi-circular rectangular rod portion. A straight portion is formed, extending from the partial circular portion, to attach to the long handle. The small flat portion has a taper both in depth and in width to a free cutting edge. A notch is formed in the middle of the free cutting edge. Carbide tips can be provided on the free cutting edge for increased wear resistance. The garden tool can be used for cultivating or furrowing a row to a depth of five to six inches for seed planting. When pulled through the earth, the partial circular portion easily rolls the dirt away so that there is no jam up of soil in the rod support portion. The rod member is formed from spring steel to provide for a strong, resilient tool member. The length of the flat planar portion is relatively small being of only slighter greater length than width.

Abstract: This invention relates to a cultivating shank assembly in which a mounting frame is comprised of a mounting frame portion and a tool shank support portion pivoted thereon. The mounting frame portion and the tool support portion are formed of plates which are held together by suitable transversely extending plates which support the mounting frame on a cultivating tool bar and mount the tool shank respectively. A compression spring for the mounting assembly is connected between the tool shank portion and the mounting frame portion of the mounting frame and is guided between inner and outer cylindrical spring retainers which are pivoted respectively on the tool shank support portion and the mounting frame portion to prevent the compression spring from buckling and to guide the same such that the compressive force will always be applied along the extent of the spring.

Abstract: A raise boring system is provided for boring raise holes wherein the finished raise holes have portions of different diameters. The system includes a raise head with a central drive stem defining an axis of rotation. Primary cutter means are positioned on the raise head for disintegrating the earth formations out to a first radial distance from said axis of rotation. Expanding secondary cutter means are positioned on the raise head for selectively disintegrating earth formations from said first radial distance out to additional and greater radial distances from said axis of rotation. The expanding secondary cutter means may be selectively located in a first position either beneath or in the same plane as the primary cutter means during boring at said first radial distance from said axis of rotation and selectively located in additional positions for boring at greater radial distances from said axis of rotation.

Abstract: A self-drilling dowel consists of a tubular-shaped member with a drilling head at one end. The drilling head is formed of a plurality of teeth each having a tip. The tip of the teeth are all disposed in a single plane inclined at an angle to the axis of the tubular-shaped member. A line perpendicular to the plane containing the tips of the teeth and intersecting the axis of the tubular-shaped member is disposed to the axis at an angle in the range of 4.degree. to 9.degree.. The teeth are formed by a cutter with its center located at an offset position from the axis of the tubular-shaped member. The feed line of the cutter extending through its center can be parallel to the axis of the tubular-shaped member or it can be set angularly to the axis of the tubular-shaped member in the range of 4.degree. to 9.degree. or 81.degree. to 86.degree. depending on whether the cutter is moved generally in the axial direction or transversely to the axial direction of the tubular-shaped member.

Abstract: A weight-measuring and display device includes a rigid structural housing for supporting a load positioned thereon and a strain-sensing and weight-displaying circuit located within the structural housing. The rigid structural housing includes a top plate on which the user stands or the load is placed, a bottom plate and three deflection beams horizontally arranged between the top and bottom plates. Mounted to the top of each deflection beam is a strain gauge and mounted to the bottom of each deflection beam is another strain gauge. The group of three top mounted strain gauges accounts for the resistance in one arm of a wheatstone bridge and the group of three bottom mounted strain gauges accounts for the resistance in a second, adjacent arm of the wheatstone bridge. In addition to the wheatstone bridge, the strain-sensing and weight-displaying circuit further includes an amplifier portion, an analog to digital converter, a BCD to seven-segment decoder and three, seven-segment LED readouts.

Abstract: The invention concerns a vehicle of the type comprising a mobile carrier, a pedestal mounted thereon for rotation about a vertical axis, and a swivel joint connected between the pedestal and the carrier and through which energy is transmitted. The swivel joint comprises a stationary sleeve mounted on the carrier along the vertical axis and a rotary sleeve mounted coaxially around the exterior of the stationary sleeve. The stationary sleeve includes a plurality of passages extending parallel to the axis for transmitting pressurized fluid. The rotary sleeve includes a plurality of fluid ports. The stationary sleeve includes an annular channel, for each passage, communicating the fluid port with the passage during rotation of the pedestal. An upper gear box is mounted at an upper end of the rotary sleeve for rotation therewith, and a lower gear box is mounted at a lower end of the stationary sleeve.

Abstract: A motor grader is provided with an electrical control circuit for automatically effecting engagement, speed, and direction control of an auxiliary hydrostatic front wheel drive system to augment the primary engine-driven rear wheel drive system.

Abstract: A toy stethoscope having a resilient sound collector at one end thereof. The sound collector is soft and pliable so as to prevent injury to a person in the event the person is struck by the sound collector. The sound collector further comprises a damper formed from a soft sponge or foam material that prevents unpleasant pressure and/or injury to the ear drums in the event a loud sound is introduced into the sound collector due to someone yelling or blowing directly into the collector or the like.

Abstract: A speaker system employs: a baffle board in front of a cabinet made of wood, with a woofer mounted on the baffle board; and a sub-baffle board having a medium-range speaker and a tweeter mounted thereon. The sub-baffle board comprises a metal board and a damping plate such as a rubber plate laminated on the metal plate.

Abstract: Loudspeaker equipment is disclosed of a type comprising a speaker and a speaker enclosure, the enclosure having intercommunicating front and rear compartments, the front compartment being of larger volume than the rear compartment, and the compartments being defined by walls formed of sheet material and being substantially imperforate, except for a speaker opening in one wall thereof.

Abstract: The invention relates to active acoustic absorber devices for absorbing the sounds which are emitted by a emitter source and which propagate therefrom, along a pipe. An absorber according to the invention comprises an acoustic tripole which is composed of two auxiliary acoustic sources which constitute a dipole and of a third auxiliary source which constitutes a unipole, these three sources being located in the same acoustic chamber, which chamber is disposed outside the pipe, opens therein through three orifices aligned parallel to the longitudinal axis of the pipe and comprises a transverse plane of symmetry perpendicular to the axis of the pipe.

Abstract: A muffler for an internal combustion engine includes a cylindrical casing having end plates closing the interior thereof. At least one baffle extending perpendicularly to the central axis of the casing is provided for dividing the interior of the casing into a front chamber and a tuning chamber. A tuning tube extending through the baffle places the front chamber into flow communication with the tuning chamber, and at least one exhaust gas inlet pipe extends into the front chamber through one of the end plates in coaxial relationship with the tuning tube. At least one exhaust gas outlet pipe is provided through the one end plate in parallel relationship with the inlet pipe. Furthermore, one or more openings are provided in the baffle in coaxial relation to the exhaust gas outlet pipe.

Abstract: Prefabricated element arranged on a single wall of a room for forming a double sound insulating and sound absorbing wall. The prefabricated element provides efficient sound insulation of the room and a total sound absorption of sound waves whose frequency is centered at one of the natural frequencies of the room. The element comprises a frame supporting a flexible panel by means of elastic sealing means, the flexible panel being maintained at a predetermined distance from the single wall due to the thickness of said frame whereby the resonant frequency of the double wall becomes equal to a natural resonant frequency of the room corresponding to sound waves propagating perpendicularly to the single wall. In addition, the prefabricated element may also comprise an additional element placed in the middle of the panel which permits equalization of the natural resonant frequency of the assembly comprising the flexible panel and the additional element to the low natural frequency of the room.

Abstract: A vest adapted to be worn by a workman operating at perilous heights. The vest has straps between the lining and the outer fabric. The straps have crossed sections in the back of the garment and vertical sections in the front panels. The lower ends of the front and rear section are secured to a body embracing belt which is sewed to the fabric along the belt line. The upper end of each crossed section extends from one side of the vest to the other and has its upper end formed into a hooking loop with the upper end of the vertical section at that side of the vest, the loop projecting through an opening formed in the associated shoulder portion of the garment for connection to one end of flexible line which is adapted at its other end to be secured to structure at an elevation higher than where the workman is operating.

Abstract: A rope ladder in which a pair of bolted-together wedge collars and a wedge heart act upon a pair of ropes at each side of each step, to wedge themselves to the rope so that they and their step are locked firmly in place, relative to the rope.

Abstract: A ladder with elongated side rails each with a web with two broad surfaces, and rungs supported by and extending between the webs of the side rails at spaced locations, has rung brackets molded into and embracing the webs, each of the rung brackets having a rung receiving boss and a base part on one broad surface of the web and a pad part on the other broad surface, and tying members, integral with the base and pad parts, connecting the parts and extending into the web. In making the ladder, holes are formed in the webs at the rung locations and the rung brackets are molded in place in and through those holes.

Abstract: A supermarket counter construction in which an upper surface of the counter is provided with an elongated slot. A cooperating cart includes a slideably mounted vertical side wall which when lowered for unloading the contents of the cart enters the slot which confines subsequent movement of the cart to a straight line parallel to the principal axis of the counter, and constrains the cart adjacent the edge of the counter so as to facilitate re-loading of the contents after checking and bagging.

Abstract: An elevator system including an elevator car having an entranceway, a door having one or more door panels mounted for movement to open and close the entranceway, a door operator for the door, and mounting hardware for mounting the door operator on top of the elevator car. The mounting hardware provides horizontal and vertical adjustment of the door operator, with all adjustments being easily made from the top of the car. When the elevator car has a two-speed door, the high and low speed hanger tracks are horizontally spaced from one another, and they are mounted outside of the vertical projection of the door operator frame. The door hanger plates for both the high and low speed door panels are disposed between the hanger roller tracks. The spacing between the high and low speed roller tracks enables the hanger plates and door panels to be placed in position, or to be removed, from the top of the car.

Abstract: A snubber apparatus having a pair of elements telescopically interconnected for relative movement with respect to each other through a ball nut or lead screw device, a braking surface on one of the elements, an inertia mass driven by the other of the elements, a support for the brake shoe and a lever coupled to the inertia mass and pivotally coupled to the support for urging the shoe against the braking surface.

Abstract: In a rotor for vehicle brakes, for example, discs for disc brakes and drums for shoe-drum brakes, the braking member is carried from one side of a driving component for connection to a wheel or shaft. The outer face of the member remote from the driving component comprises a braking surface which can be engaged by at least one friction member. The braking member comprises an annulus, and the driving component a cast mounting which is formed with a discontinuous abutment face with which the braking member is in direct intimate contact over a substantial area. Clamping members additional to and separate from the annulus and the mounting are provided for clamping the annulus against the abutment face to maintain the intimate contact between them.

Abstract: The invention comprises an adjustable damping mechanism for such as pan and tilt heads comprising two or more mateable surfaces operating with lubrication wherein the pressure of one surface on the other is variable and combines solidity when stationary, drag proportional to velocity in movement up to whip pan velocity after which the drag remains substantially constant.

Abstract: A torque converter and multi-disc lock-up clutch has a pair of clutch discs splined to the input shell of the torque converter, a friction disc splined to the clutch piston intermediate the clutch discs and a friction pad secured to the clutch piston. The clutch piston is drivingly connected with the turbine of the torque converter. The clutch is controlled by fluid under pressure delivered to the torque converter such that during disengagement, the fluid passes between the clutch discs and the friction disc prior to entering the torque converter.

Abstract: A positive parking brake for a vehicle with a transmission output shaft having a pair of gears rotatable thereon. A hub is fixed to the shaft between the gears and a clutch sleeve is axially slidably splined to the hub periphery whereby the sleeve and hub may be selectively coupled to the clutch teeth or either gear. A sleeve shifter fork has an opening therethrough whereby a braking pawl may be operated by a cam and spring device so as to extend through the fork opening to engage brake teeth on the sleeve periphery and brake the vehicle.

Abstract: A drive transmitting device is disclosed which may be preset and will subsequently become locked if sudden or gradual rotation forces are applied, the device comprising a first member at least part of which is inside a second member, a rotation of one of the members in either direction about an axis of rotation causing a rotation of the other member about the axis. There are rollers around the axis which co-operate with wedging surfaces in the device to prevent a rotation of the said one of the members from its preset position about the axis as a result of a rotation of the said other of the members in either direction about the axis, the rollers being arranged in respective pairs around the axis, the number of such pairs being more than two. The forces required to restrain rotation are shared substantially equally between respective rollers of the pairs.

Abstract: The invention relates to automobile friction clutch driven plates, and in particular to driven plates having idling vibration dampers and load vibration dampers. The friction clutch driven plate includes two concentric hub members. On one hub member is mounted a friction facing carrier capable of limited restrained angular movement about the hub axis relative to the hub members. The friction facing carrier and the other hub member have spring seatings, being hub member seatings and carrier seatings, so that springs acting between the seatings oppose relative rotational movement between the hub members. The construction of the driven plate is made compact and simplified by having the hub member seatings and carrier seatings in a common radial plane.

Abstract: A coin box and vault includes a housing defining a chamber for receiving a lockable coin box. The coin box includes inner and outer relatively rotatable cylindrical housings having coin receiving openings in the sides thereof with a locking assembly for locking the housing in a position of non-alignment of the opening, a latching bracket and unlocking device is provided in the chamber for cooperatively engaging the locking assembly for unlocking the box for preventing relative rotation of the inner housing with respect to the outer housing and simultaneously locking the box assembly within the chamber.

Abstract: For separating green bricks arranged in a compact array of abutting rows, a separating device is operable to engage the leading row of the compact array and to hold the individual row between the separating device and a base as the remainder of the array is moved away, whereby the engaged individual rows are sequentially separated at spaced distances on the base.

Abstract: In this assembly of conveyor elements each element is corrugated to comprise a regular series of alternating hollow portions and projecting portions to constitute bucket-like elements having each at one end a bellows structure and at the other end a plain end wall preferably higher in the center of the hollow portions than near the projecting portion; a transverse lip may be formed integrally on one side of the projecting portion, and the bottom of each element is secured to a link of a longitudinally non-extensive drive member, for instance a chain, the assembly of elements being adapted to undergo a certain deformation not only in directions at right angles to the longitudinal direction but also in any other direction. Two adjacent assemblies of elements may be imbricated with each other along their edges formed with plain end walls for clearing possible obstacles engaged therebetween.

Abstract: A conveyor on which a casting mould consisting of closely juxtaposed mould parts is advanced stepwise, comprises a section formed by an endless flexible belt. Extending along the side edges of this belt are reciprocating coupling parts which during at least part of their forward stroke are firmly clamped to the edge portions of the belt, from which they are released during their return stroke. In this way elastic extensions and retractions of the flexible belt are excluded.

Abstract: A merchandise container including a box-like base having an opening in its top wall. A box-like insert within the base projects through the opening above the base top wall, the top wall of the insert having an opening for accommodating an article of merchandise. A double walled shell has a liner within it, the liner projecting below the bottom edge of the shell and fitting snugly around the portion of the insert projecting above the base. A core is located between all the double walls of the shell to maintain a spacing between them. The container is formed of no more than five pieces of folded and glued paperboard, namely, the pieces forming the base, the insert, the shell, the liner, and the core. The insert includes a platform upon which the merchandise rests, and locking means for preventing removal of the insert from the base. Both ends of the shell may be open, the upper end being closed by the top wall of the liner.

Abstract: A lens case for storing and transporting a photographic lens in a substantially environmentally sealed condition, the case including a tubular body portion bonded to an open end-encompassing base. Positioned interiorly of and disposed in spaced relation from the body is a tubular liner covered by a felt-like padding material. A foamed, resilient secondary shock-absorbing liner is usually provided interiorly of the liner and covering the bottom. The exterior of the body portion and its mated end are covered with leather or the like. A cover member is configured similar to the bottom portion and is also interiorly padded and exteriorly covered. Strap-type hinge means, including a belt loop, connects the body to the cover. Strap-type latch means is affixed to the top and adapted for latching to the body. Carrying strap attachment loops are also provided on the sides of the body.

Abstract: A package exhibiting high strength for containment during storage and shipping and stability thereof in humidity variations. This package comprises a multi-cell container prepared from a partially corrugated first material having peaks and flutes, a polymeric film encompassing the outermost peripheral surface of said container and a cover for said container and which cover is prepared from at least a partially corrugated second material having peaks and flutes.

Abstract: A rectangular plastic box for storing video cassettes which includes an unobtrusive hook portion by which the box may be hung on a horizontal member received through a recess in the box. The box also includes a handle portion along its edge opposite the hook which can be stored in a recess from the outer surface of the box, and can be swung out and manually engaged to facilitate carrying the box, or hanging it on or removing it from a horizontal member.

Abstract: A wound roll of a strip of fibrous material having a first end portion forming an innermost plurality of superimposed contiguous layers and a second end portion forming an outermost plurality of superimposed contiguous layers, a plurality of punctures defined in each of the end portions, each puncture being characterized by a burr projected therefrom into interlocked relation with a puncture defined in an adjacent layer, whereby the end portions of the strip are secured together in the roll.

Abstract: A sheet gift wrap package is comprised of two identical nests of folds positioned in a transparent plastic bag in back-to-back relationship. Each fold is comprised of at least two sheets of decorative gift wrap, the sheets being arranged in each fold so that a portion of each sheet is visible in the nests.

Abstract: An improved disk memory dust shield having an exterior surface similar to the surface of the disk module housing which mates with it, thereby allowing a plurality of dust shields to be nestingly stacked with each other. This permits all the dust shields not currently in use because their disk modules are mounted in drives, to be compactly stored.

Abstract: A grain scalping and cleaning apparatus for removing impurities in grain according to size is disclosed. The apparatus includes multiple grain movement paddles moving relative to appropriate screens. An endless chain drives the grain movement paddles. Both large and small impurities are separated from the grain through the use of the screens and paddles with the aid of gravity. A method for removing impurities in grain is also disclosed.

Abstract: A bathroom wall fixture has a mirror whose lower edge is secured in a pair of like supports each having a seat engaging and supporting the mirror. These supports each have an upper part and a lower part and together form the seat for the mirror and are formed with respective holding formations between which a horizontally extending bar may be clamped by screws vertically engageable between the upper and lower parts of these supports. Accessories such as shelves or the like can be fitted over the bar and positioned anywhere therealong, and this bar can project to either side of the supports for use as a towel rack.

Abstract: A display unit has rolling panels entirely supported from the bottom and lacks a top frame. Each display panel is carried by wheels on a track which is adjustable to any front and back position with respect to the base of the stand. The top of each display panel carries a light-weight scissors whose sole function is to hold the panel vertical and which rolls in an upper track so that whatever position the bottom track is placed in, the upper scissors can accommodate to and hold the panel vertical.

Abstract: A paint brush merchandising display including a module having two vertical side walls, a back wall, and a forwardly and downwardly inclined bottom wall which extends beyond the front edges of the side walls. The side walls accommodate between them the handles of a stack of paint brushes, the wider bristle part of each paint brush being forwardly of the side walls. Strips of resilient material, such as foamed plastic, project into the space between the side walls to frictionally grip the paint brush handles. The module carries either a bottom bracket for mounting it on a shelf, or hook-like elements on its back wall for engagement over horizontal support bars. The support bars support the module so that it inclines downwardly and rearwardly. The support bars may be mounted on a pegboard.

Abstract: A seal assembly for bottles or flasks includes a neck member having a generally elongated hollow configuration adapted to non-rotatably fit about the exterior of a bottle or flask. A generally hollow cylindrical intermediate member has a portion which fits within the neck member and cooperates therewith to prevent relative rotation therebetween. The intermediate member has on the interior thereof a device to cooperate with the neck of the bottle or flask to prevent relative longitudinal movement therebetween. The intermediate member has at the upper end thereof a dispensing opening adapted to align and cooperate with the opening in the neck of the bottle or flask. A stopper member has a closed upper end and an open lower end and threads onto the exterior of the intermediate member such that the closed upper end of the stopper member blocks the dispensing opening of the intermediate member.

Abstract: A closure system is provided for a threaded container. A threaded closure cap has an annular skirt which engages a resilient gasket that is stretched over the bottle neck. The resilient gasket overlies a cap support flange which extends from the neck. Downward axial movement of the cap with respect to the container provides a vertical compressive force against the resilient gasket by the cap skirt. A heat shrinkable outer member surrounds the closure cap and provides a tamperproof seal with respect to the container.

Abstract: A milk bottle has an antitamper cap having a plug adapted to fit into the mouth of the bottle. The neck of the bottle is tapered toward the mouth and the cap has means for restraining the top of the neck to keep the mouth in good sealing contact with the plug when the cap is screwed on.

Abstract: The end walls of the container are hinged to the opposite vertical edges of one side wall. The roof is hinged to a longitudinal listel rigid with said one side wall, inwardly protruding from the longitudinal upper edge of the latter at 90.degree., and is disengageably coupled with a similar listel on the longitudinal upper edge of the other side wall. Both side walls have their longitudinal lower edges hinged to the base wall of the container, the said one side wall being hinged at a level lower than that of the hinges of the other side wall. The container is collapsable to a reduced volume by first folding the end walls onto the inner face of said one side wall, subsequently downwardly folding the roof onto the folded end walls, then downwardly folding onto the base wall said one side wall with its carried end walls and roof, and downwardly folding the other side wall onto the said one side wall.