Abstract: The safety cradle is adapted to releasably secure an outboard motor for storage and transport and is particularly adapted for mounting in the cargo portion of an open or paneled truck. The cradle includes an upright transverse pivot brace securable at one end thereof to a support structure such as the truck sidewall, with a pair of pivot points at its opposite free end, and an elongated support arm having a motor supporting portion. The arm is pivotally secured to the brace at the pivot points and is rotatable between a forward secured position and a rearward release position. A bracket is also provided which is securable to the flat bed of the truck in front of the pivot brace at a location to engage the free end of the pivot arm. The bracket includes a base and an upright bearing a transverse lock bar and a transverse C-shaped member below the lock bar. The C-shaped member is adapted to engage the drive shaft housing of an outboard motor.

Abstract: A mechanical bowstring release device automatically biased to the locked position having a hollow, preferably generally cylindrical housing having a central space along the length thereof and a bowstring retainer bar pivotably secured to the housing in the space. A string-retaining end of the bar extends into an opening in the front end of the housing. The bar also includes an opposite coupling end. The bar is pivotable between a bowstring-drawing locked position and a bowstring-releasing unlocked position. An elongated lever arm extends longitudinally of and is pivoted in the housing space, the rear portion thereof extending rearwardly of the housing, the front end thereof being adjacent and generally rearward of the retainer coupling end. One or more couplers connect the front end of the lever arm and the coupling end of the bar. A biasing spring automatically urges the front end of the arm into a position which locks the bar.

Abstract: An improved filter screen device is provided which comprises an elongated, tubular housing, a hollow elongated perforated tubular member releasably secured in the hollow central interior of the housing and a flexible sock-type filter screen releasably disposed over the outer surface of the tubular member in the housing. The housing includes an open upstream end which is closed by the tubular member and a closed opposite downstream end. An inlet is disposed at an acute angle to the length of the housing and intersects the housing interior between its upstream and downstream ends. A first outlet is disposed at the downstream end along about the longitudinal axis of the housing so as to communicate with the interior of the hollow tubular member. A second outlet is also disposed in the downstream end of the housing at an angle to the first outlet and communicates with a space between the filter screen and the housing.

Abstract: The assembly includes an archery bow with an arrow shelf and sidewall defining an arrow window and an arrow rest disposed in and behind the window and supporting an arrow in the window for shooting from the bow. The rest has a mounting bracket which includes a mounting arm rigidly secured at a plurality of points to the bow sidewall on the side opposite the window. The arm extends horizontally rearwardly to a point behind the bow. The arm's rear end bears a groove in which a transverse crossbar is slideably received. The crossbar has a long slot in it and a scale around the slot. A screw clamps the arm and bar together through the groove and slot. The screw can, if desired, be geared to the slot, so that rotation of the screw moves the crossbar transversely. The bar bears a rotatable post behind the window.

Abstract: The fuze comprises a fuze body having a readily crushable nose cone and a thermal initiator, a thermally ignitable flash detonator and a main charge of booster explosive disposed in sequence in the body. The thermal initiator includes a cup having a closed front end and an open rear end closed by a non-metallic, thermally destructive closure. A readily thermally ignitable, incendiary, exothermic chemical material is disposed in the cup, and the cup is fixed in the nose. Rearward of the cup a rotor ball is disposed in the fuze, which rotor ball contains the detonator. A C-spring connects the rotor ball to the fuze body and maintains the rotor ball in an orientation such that the detonator in the rotor ball is out of alignment with the initiator except when the fuze is spinning beyond the gun barrel as when it is connected to a fired projectile. The detonator includes a cup having a closed thermal barrier alignable with the rear end of the initiator cup, and a thermally destructive closure on the opposite end.

Abstract: The improved method of the present invention comprises making selected polyesters by condensation polymerization of polycarboxylic acids with a plurality of diols, the diols being in a eutectic mixture having a melting point below that of the individual diols in the mixture. Thus, the eutectic mixture is charged in the liquid state with a sufficient amount of the acid and reacted under condensation conditions to form an ester and to polymerize the ester to the desired extent. A substantial saving in the amount of labor necessary to prepare the polyester is provided by the present method. The diols are preferably selected from the group consisting of neopentyl glycol, trimethyl pentanediol, cyclohexane dimethanol, and 1,6 hexanediol. Usually two diols are employed to form the eutectic mixture. They are normally waxy solids at ambient temperature, but are liquid when mixed in the proper proportions to provide the eutectic.

Abstract: An improved rechargeable lead-hydrogen electrochemical cell is provided which comprises a cell stack secured to a retainer and disposed within a pressure vessel containing hydrogen gas. The stack includes a positive electrode comprising lead oxide, a pair of gas-porous negative electrodes containing a catalyst, a pair of separators and a pair of gas screens. The stack components are saturated with sulfuric acid electrolyte. Each of the negative electrodes has a separator disposed on one side thereof and a gas screen disposed on the opposite side thereof. The pressure vessel contains a gas inlet, and electrical leads connect to, respectively, the positive and negative electrodes and exit the pressure vessel. In the charged form, the cell reactants exist as lead oxide and hydrogen gas. When the cell is discharged, the lead oxide is reduced to lead sulfate and the hydrogen gas is oxidized at a catalytic surface to hydrogen ion.

Abstract: An improved archery bowstring release aid is provided which has a preferably flexible, self-supporting resilient ledge generally perpendicular to the length of the release aid and having an opening for an arrow shaft, the opening being bordered by a pair of bowstring-engaging portions. A rear wrist-engaging support member, which can be in the form of a strap, rope or glove and a self-supporting intermediate portion interconnecting the ledge and rear support complete the release aid. The release aid is adapted to be positioned on the medial side of the archer's draw hand, with the bowstring-engaging portions of the ledge facing the archer's palm and temporarily supported by the curved archer's fingers. It may also include a transverse brace member across the intermediate portion. Upon reaching full draw, the archer relaxes his or her fingers and the release aid, particularly the ledge, and usually the intermediate portion, flexes to release the drawn bowstring to fire the arrow forward from the bowstring.

Abstract: An improved liquid filtration system is provided which comprises, in combination, a tank or other vessel having a central cavity and a liquid inlet tube and liquid outlet tube spaced apart. A porous, rigid, self-supporting removable filter is placed in the tank between the liquid inlet and liquid outlet and forms part of the system. The filter comprises a plurality of modules, each module comprising a self-supporting body of granules cemented together by set organic resin such as epoxy resin and disposed in a frame of, for example, fiberglass-reinforced nylon. Preferably, the modules are steeple shaped, placed in a circle or wheel configuration and removably secured to a cross plate fixed to the walls inside the tank. The upstream portion of the filter body in each module preferably contains a layer of fine aggregate while the downstream portion of the filter body preferably contains a layer of larger aggregate.

Abstract: An improved reversible quick exhaust valve is provided which comprises, in combination, a valve housing and a flexible resilient valve member disposed in the housing. The housing has a hollow interior and defines and entry port and first and second exit ports. A valve support is positioned in the interior to define with the housing a narrow passageway between the inlet port and the first exit port. The valve member is in the form of a flexible plate having a depending wall. The plate is disposed over one end of the valve support and the depending wall extends into the passageway. The plate blocks passage of liquid from the inlet port to the second exit port. The depending wall flexes during passage of the liquid from the inlet port into the housing and through the passageway to permit the liquid to pass out of the housing through the first exit port.

Abstract: An improved self-feeding cable stripper is provided which has a base, preferably divided into two parts clampable together about a cable opening extending up through the base. The stripper also includes a cylinder bearing external threads, the cylinder being secured to the top of the base and also having a central cable-receiving opening extending therethrough and aligned with the base opening. A fitting bearing internal threads is threadably secured over the cylinder, the threads being arranged such that when the fitting approximates the base, the threads disengage so that the fitting turns freely on the cylinder. A cutter is mounted in the fitting and extends into a central cable-receiving opening in the fitting, which opening is aligned with the cylinder opening. The cutter has an adjustable blade for cutting sheathing of a cable, clamped in the base and extending up through all of the openings, when the fitting is screwed down on the cylinder.

Abstract: An improved hermetically sealed heat resistant connector and cable assembly is provided which comprises an elongated heat resistant connector body having a central passageway extending throughout the length thereof, a sheathed cable containing a plurality of spaced leads slidably disposed in one end of the passageway with the leads projecting from the cable in the passageway, and a dielectric element in the form of a disc having openings extending therethrough within which the leads are disposed, the element being held in the connector body passageway against the cable. A heat resistant connector plug is slidably disposed in the opposite end of the passageway. The plug has a spaced parallel number of hollow pins extending along the length thereof and aligned with the openings of the dielectric element, the pins receiving the leads as they emerge from the dielectric element. The pins are crimped around the leads for proper connective purposes.

Abstract: An improved liquid filtration system is provided which comprises, in combination, a tank or other vessel having a central cavity and a liquid inlet tube and liquid outlet tube spaced apart. A porous self-supporting filter is arched over the liquid outlet tube and forms part of the system. The filter comprises granules cemented together by organic resin. For example, fine aggregate stone particles are cemented together by an epoxy resin so that the filter is both porous and strong. Preferably, the upstream portion of the filter contains a first layer of fine aggregate while the downstream portion of the filter contains a layer of larger aggregate. The system also includes a connector releasably securing the filter over the outlet tube. The filter is relatively small, occupies only a small portion of the bottom of the tank, can be removed for cleaning and replacement and is light in weight. Preferably, the filter has an upstream cover portion of a porous metal plate material in domed configuration.

Abstract: The method comprises covalently binding an immuno-reactive to a selected macromolecular carrier and then contacting the resulting hapten-carrier conjugate at a selected concentration in a liquid phase with a selected solid phase until a desired amount of the hapten-carrier conjugate is adsorbed to the surface of the solid phase. Unbound hapten-carrier conjugate is then separated from the solid phase, and the solid phase containing the bound hapten-carrier conjugate is recovered for use in quantitative immunoassays and the like. The solid phase can be, for example, surfaces of a test tube or microtiter well or the like. The method is simple and inexpensive and permits hapten assays of improved sensitivity.

Abstract: An improved archery bow assembly is provided which includes an archery bow having an arrow shelf and sidewall defining an arrow window, an archery arrow and an improved arrow rest disposed in and behind the window and supporting the arrow in the window for shooting. The rest includes a bracket, and first and second arrow supports connected to the bracket and supporting the bottom and at least one side of the arrow. The bracket has an arm releasably locked to the sidewall through an elongated slot, which arm extends horizontally rearwardly of the bow and is interconnected to a rear connector plate. A horizontal transversely extending cross arm passes through and is clamped in the connector below the rearwardly extending arm. The cross arm bears in a slot thereof the first arrow support in the form of an upwardly and forwardly extending flexible blade, preferably having a small raised flange at the outer margin of its forward end. The cross arm is rotatable to set the angle of the blade.

Abstract: An improved mechanical bowstring release device has a hollow, preferably generally cylindrical housing having a central space defined by a pair of spaced flanges and a retainer bar pivotably secured to the housing in the space, one end of the bar projecting from the housing when the bar is pivoted into a bowstring-drawing locked position, the bar also being pivotable to a bowstring-releasing unlocked position. A link extends longitudinally of and is pivoted in the housing space and the rear portion thereof defines a V-shaped rearwardly facing receptacle into which is inserted the pointed front portion of a trigger arm. The arm is pivotably secured in the housing space and is rearwardly and laterally of the housing. Couplers connect the front end of the link and the coupling end of the bar. A spring urges the front end of the arm into a position which locks the bar.

Abstract: An improved hydroponic growing system comprises, in combination, an elongated preferably rectangular hollow trough having substantially closed sidewalls and bottom and an open top defining a central space. The trough defines a pair of spaced tracks extending the length thereof in the space and an elongated flexible strip is slideably disposed in the tracks. The strip contains a plurality of spaced apertures extending vertically therethrough along the length thereof and in each aperture is disposed a plant growing cup having a hollow body defining a central space, an open top, a porous bottom and substantially closed or perforated sidewalls. The sidewalls bear outwardly extending peripheral supports so that the body of the cup extends down into the trough space and the cup is releasably held in position by the support bearing on the upper face of the strip.

Abstract: An improved archery arm guard is provided to prevent bowstring slap when shooting an archery bow. The arm guard features an elongated, preferably transversely curved, smoothly surfaced self-supporting body defining a number of internal preferably transvese passageways through which freely extend bads, straps, cords or the like, to releasably secure the arm guard in place on an archer's arm. The bands preferably are stretchable and include free ends bearing releasable securing devices such as snap buttons, Velcro strips or the like. Preferably, the body of the arm guard is curved down at the rear end to prevent inadvertent hooking of the bowstring under the arm guard during shooting of the bow. Moreover, the body is preferably curved up at the front end thereof to prevent its binding against the archer's wrist in use.

Abstract: An improved method of making a silver chloride and copper chloride-containing electrode comprises forming a minimum melting point mixture of about 47% by weight of silver chloride and about 53% by weight of cuprous chloride and melting this mixture e.g. at about 255.degree. C., cooling the resulting eutectic, as by casting the same, to form solid pieces, and then grinding the eutectic to a powder of e.g. about 100 mesh. This powdered eutectic is then uniformly mixed with a predetermined desired amount of additional particulate cuprous chloride and the resulting mixture is heated in a mold to above the melting point of the eutectic therein to cause the eutectic to melt and bind the particles of cuprous chloride together. Normally the eutectic is in a concentration of about 10% by weight and the additional particulate cuprous chloride is in a concentration of about 90% by weight of this mixture.