Abstract: A door security device which is mounted in the floor or other flat surface in the arc of passage of a door which can be operated solely by one's foot. The door security device includes a housing with a flange plate which is mounted in the opening of the floor surface. A stop member is provided within the housing which assumes two alternate positions, a lowered position and a raised position. In the lowered position, the door is free to move through its arc of passage without obstruction by the door security device. By pressing down on the principal surface of the stop member, a latching mechanism is actuated which allows the stop member to be spring biased into the open position. In the open position the stop member obstructs the motion of the door through its arc of passage so that the door can be opened only a limited distance.

Abstract: A top air nozzle for blowing water off a washed moving vehicle in a car wash comprises a unit nozzle housing of molded plastic material having an arcuate top wall, laterally diverging side walls, a pair of laterally spaced mount blocks, an upright rear wall, an upper front wall portion inclined downwardly and outwardly of the rear wall and terminating in a lower front wall portion inclined downwardly and inwardly toward the rear wall. The walls and wall portions defined an air chamber of laterally increasing width from its top with the rear wall, lower front wall portion and side walls defining a laterally elongated throated air outlet. A plurality of spaced threaded insert fasteners arranged in a circle are molded, interlocked and enclosed within one of the upper front wall portion and rear wall. A plurality of spaced fasteners are arranged in a row, are molded, interlocked and enclosed within each mount block.

Abstract: A microprocessor-based electronic timekeeping apparatus or stopwatch for measuring multiple intervals of time, such as the elapsed times of a race horse covering successive distances of a race course, is disclosed. This hand-holdable, self-contained stopwatch has four multiple-digit display fields for simultaneously displaying up to four measured intervals of time preferably in minutes, seconds and fractions of a second. In a first mode of operation, the stopwatch is used to measure and display four overlapping intervals of time having a common starting time and different stopping times. In a second mode of operation, the stopwatch is used to measure multiple intervals of time which have an operator-determined untimed period between successive intervals. The stopwatch includes additional display fields for indicating the mode of operation and the specific intervals of time being displayed.

Abstract: A tow truck of the wheel-lift type is provided. In a first embodiment, a telescopic boom is supported by parallelogram linkage which is actuated by a hydraulic motor which is slightly inclined to the horizontal, the inner end of the boom, in its travel position being above and somewhat forwardly of the ring gear housing of the rear axle of the tow truck. The parallelogram linkage supports the boom through a boom support structure which permits it to be swung in a substantially horizontal plane, about substantially vertical pinions. The grid, which engages the wheels, includes a movable member which engages a wheel and raises it relative to the boom and grid, without movement of the boom. In a second embodiment, a substantially vertical post supports a parallelogram linkage which in turn supports a substantially horizontal extensible boom having a wheel grid at its outer end.

Abstract: A trencher machine digging boom assembly having a mounting arrangement for the digging boom wherein the boom includes a boom attaching weldment that is pivotally mounted to a boom pivot casting. The boom pivot casting is rigidly mounted to a trencher frame with a drive motor being mounted to one end of the boom pivot casting and a planetary gearbox being mounted at its opposite end. The planetary gearbox and associated drive components for the digging chain may be disconnected to permit easy and convenient removal of the digging boom for replacing its pivot bearings. Further, the torque reactions of the drive train are maintained within the boom pivot casting and are not transferred to the lift components associated with the digging boom.

Abstract: A skateboard comprises a single oversized centrally-located wheel in addition to conventional pairs of front and rear wheels. The wheels are arranged so that the board will ride on no more than three wheels at a time, with either the front or rear pair being elevated above the supporting ground surface, depending upon the rider's longitudinal weight distribution on the skateboard relative to the center wheel. An optional foot-operated friction brake is engageable with the center wheel.

Abstract: An aerosol dispenser has a housing adapted to hold an aerosol under pressure relative to a pressure outside of the housing. The housing has an interior chamber surrounded by interior walls and an opening to the outside. A stopper assembly is disposed within the housing and shaped to substantially conform to the shape of the housing. The stopper assembly is movable from a first position, in which the stopper assembly is substantially in contact with the interior walls of the housing so as to seal off any means of egress for the aerosol, from the interior chamber to the outside of the housing, to a second position, in which the stopper assembly is substantially out of contact with the interior walls so that at least one means of egress for the aerosol is established., At least one means of egress is traceable from the interior chamber to the opening to the outside.

Abstract: Apparatus for removing structural concrete comprises an elongated hood having an inner generally non-accessible zone, an outer zone accessible for performing maintenance functions and an elongated slot between the zones. A reciprocal feed carriage is guidably mounted within the hood in the inner zone and mounts a seal support housing within the outer zone. Portions of the housing extend through the slot into the inner zone and are pivotally mounted upon the carriage. A rotating shaft and seal assembly is mounted upon the seal support housing in the outer zone, including a body having a water inlet adapted for connection to a source of water under pressure. An elongated tubular shaft and nozzle assembly is axially connected to the rotatable seal and shaft assembly and extends from the seal support housing through the slot into the inner zone of the hood, through the carriage and into the bottom of the hood for directing water under pressure against the structural concrete.

Abstract: An accumulating pallet chain-dog conveyor has spring-biased roller assemblies attached to the pallet underside for frictionally engaging dogs and spacers which are connected to an endless chain. The roller assemblies include rotatable rollers having a plurality of flats for engaging the surfaces of the dogs and spacers. In operation, the pallets are propelled by the dogs which are engaged by the spring-biased rollers. The conveyor includes a pallet stop which halts the forward movement of the pallet at a predetermined position. When the forward movement of the pallet is stopped, the opposed rollers rotate the distance of one flat whereby the dog passes between the rollers in sliding, frictional engagement therewith. Thus, the pallet stops and the endless chain with its attached dogs and spacers continues to move. After the dog passes from between the opposed rollers, the rollers slidingly, frictionally engage a spacer which also passes between the rollers.

Abstract: A removable closure sheet for a recessed utility shelf within a vehicle dash board is rectangular in shape and oversize in height relative to the shelf and includes spaced thumb and finger openings to facilitate manipulation of the sheet to a transversely arcuate shape for assembly into and removal from the shelf.

Abstract: A relatively hard sand cake, containing a metal casting cavity, is formed in a flask comprising cope and drag frame sections by filling and compacting sand in the drag against the drag half of a cavity-forming pattern, then arranging the drag with the cavity opening upwards, applying the cope upon the drag and filling and compacting sand in the cope against the cope half of the cavity-forming pattern. The sand-filled cope is lifted from the drag for removal of the pattern and is re-applied to form the casting cavity in the sand cake. Next, selected wall corner joints of both the cope and the drag frames are separated and opened to laterally expand the walls of the frames away from the sand cake surfaces. This releases the sand cake from the cope and drag so that it may be removed from the flask for later casting molten metal in its casting cavity. At least two of the corners of each of the cope and drag frames include a separate corner piece against which the adjacent ends of the frame walls are abutted.

Abstract: A foldable umbrella-like cover for covering the open top of a golf club bag and golf clubs extending out of the bag, includes a vertically elongated tube that is centrally positioned within the bag, along with the golf clubs, and is releasably clamped to the wall of the bag. A vertically slidable, elongated rod extends into the tube. A ring-like collar is attached to the lower end of the rod, and the upper end of the rod is provided with a manual grip for sliding the rod into and out of the tube. A number of umbrella ribs are connected, at their inner ends, to the collar so that such inner ends may be moved, with the collar, for retracting the ribs into the tube, for closing the umbrella, or alternatively, extending the ribs outwardly of the tube for opening the umbrella. A flexible cloth-like umbrella cover is secured to the ribs and moves into and out of the tube with the ribs.

Abstract: Through bolt connection for unilaterally accessible locations. The through bolt has a cylindrical head disposed eccentrically to the centerline of the bolt by a measure e, and a sleeve disposed likewise eccentrically to the sleeve centerline by a distance e. The bolt is received in the sleeve and together they are thrust into the through hole in the parts to be fastened. Head and sleeve are of the same diameter, so that they can be inserted together head-first in the through hole in one single position relative to each other. After the bolt head is located outside the through holes, the bolt is rotated through an angle of 180.degree. to the other side so that now, owing to the eccentricity, the head catches over the edge of the through hole and its bearing surface is in contact with the surface on the inaccessible side. In this position, a nut with washer may be screwed on and tightened with the sleeve performing the function of a locating pin.

Abstract: A common relief valve circuit for controlling or monitoring two or more pumps. The circuit includes two fixed displacement pumps with the pumps being connected to at least two valve bodies or sections that supply fluid to hydraulic cylinders for operating earth-working buckets or the like. A main relief valve is connected to the inlet of a first valve section, and a check valve is connected in a parallel cavity line in the first valve section. The check valve remains closed under conditions where a valve spool in the first valve section is shifted but a valve spool in the second valve section is not shifted or when a valve spool in the second valve section is shifted and a valve spool in the first valve section is not shifted.

Abstract: An automotive roof spoiler having retractable lamps particularly suitable for trucks, vans, campers and other vehicles used for both on-road and off-road purposes. The automotive roof spoiler includes lamps which are rotatably mounted within the roof spoiler about axes generally parallel to the longitudinal axis of the spoiler and a motor, preferably located within the roof spoiler, which rotates the lamps from an upright position with the lenses of the lamps facing forwardly above the roof spoiler for off-road use to a retracted position within the body portion of the spoiler for on-road use.

Abstract: An induction heating coil for heat-treating a metallic tube by producing compressive residual stress in the outer surface of the metallic tube. The induction heating coil is adapted to be spaced from and surround the metallic tube and comprises a plurality of donut-shaped hollow electric conductor members for inductively heating the metallic tube and a plurality of donut-shaped hollow water tubes including a large number of nozzles for spouting cooling water toward the metallic tube so as to form a uniform water film thereon with the nozzles being inclined with respect to the longitudinal direction of the metallic tube.

Abstract: Disclosed herein is a combustion chamber for internal combustion engines using a volatile fuel of low certain number such as gasoline, alcohol or the like. The fuel is directly injected into communicating main and subsidiary combustion chambers which are formed side by side in the top wall of a piston and in which swirls are formed. The fuel is supplied into the main and subsidiary combustion chambers in atomized form to facilitate its volatilization, and partly deposited in the form a film which is easily volatilized by hot compressed air and wall heat in the respective combustion chambers. A spark plug is provided in the main and subsidiary combustion chambers to accelerate ignition of the atomized fuel supplied thereto.

Abstract: A pallet system formed of a unitary, plastic molded, grid-like base made of intersecting, spaced apart, longitudinal and transverse strips, whose upper edges define a carrying surface. The lower edges of at least some of the longitudinal strips are generally coplanar to form a skid-like base support surface that may be positioned upon a conveyor. The lower edges of the remaining strips are recessed relative to the plane of the support surface. A unitary, plastic molded nest, having integral upper formations shaped to receive corresponding portions of supported articles, is rested upon the base and overlaps some of the openings in the grid-like base. Integral projections on the nest extend into their adjacent overlapped openings and engage the sides of adjacent strips for accurately positioning the nest relative to the base.

Abstract: A frame assembly for mounting a sunroof panel in the roof of a vehicle includes top and bottom portions respectively disposed above and below the roof and which are secured together with the roof tightly sandwiched therebetween. The bottom frame portion includes a lateral channel-like extension for supporting a weatherstrip which engages and supports the sunroof panel. The top and bottom frame portions include a first set of opposing flanges between which the vehicle's roof is tightly sandwiched and a second set of opposing flanges between which a portion of the weatherstrip is trapped, thereby mounting the weatherstrip on the frame and creating a positive seal around the entire perimeter of the frame which prevents moisture from entering the vehicle between the weatherstrip and the frame. The frame portions are drawn together against the roof by screws extending through the bottom frame portion into a continuous rib in the top frame portion which is received within a channel in the bottom frame portion.