Abstract: An educational toy comprised of a kit of parts, and including blocks having slots in their faces, and resilient strips to fit into the slots and adapted to be retained in the slots by bending of the strips.

Abstract: A collapsible fishing net apparatus having a telescoping and collapsible rim assembly, a collapsible handle assembly, a yoke assembly receiving said rim assembly and said handle assembly and netting attached to said rim assembly.

Abstract: The assembly includes a sidewall and bead plate ring mounted on a lower bladder hub plate in a press to extend generally radially therefrom for engaging the lower half of a retread matrix which is centered thereby, and a matrix register and centering ring is provided for attachment to the lower press platen after being moved into centering engagement with the lower matrix half whereby the matrix half can be removed from engagement with the said centering ring and then be replaced in centered relationship to the press by engagement with the centering ring.

Abstract: An industrial cleaning machine that has a driven propeller means extending from a housing assembly for stirring liquid in the tank and an output shaft connected to the propeller means and carried by the housing assembly, the tank having an ear portion on a side thereof for receiving the propeller means. An apertured top plate extends over and forms a cover enclosure for this ear portion and the propeller means and housing assembly, which is of substantially L-shape, are supported on such cover enclosure. The apparatus has a seal assembly including a first seal ring having a flat side edge face thereon extending normal to the axis of the output shaft operatively positioned on the output shaft and a second seal ring having a flat side edge face thereon positioned adjacent to and engaging the first ring side edge face, tubular cover and compression means operatively engage the output shaft and seal rings to force the adjacent seal faces together to form a liquid and lubricant seal for the housing.

Abstract: An anchor assembly includes an elongate base means that has a tie-down member for operatively engaging the back end of the base means to attach it to a support, a brace member operatively engages the base means and extends upwardly thereof so that a flexible stress member can operatively engage and extend between a back end of the base means, an upper end of the brace member and the front end of the base means so that a second stress cable or chain to be anchored can engage the first stress member intermediate the upper end of the brace means and the front portion of the base means to extend therefrom to engage the work object.

Abstract: A rotation displaying device for displaying the rotating speed of an engine, especially, that of an agricultural machine such as a combine harvester, in colors classified by the low speed, standard speed and high speed. The device comprises a rotary shaft rotating at a speed proportional to the rotating speed of the engine, and a color pattern plate urged in one direction by the centrifugal force produced by the rotation of the rotary shaft. The color pattern plate is provided on its surface with a pattern of three different colors, and the color pattern changing with the successive displacement of the color pattern plate is viewed through a single central displaying opening of a display plate to display the low speed, standard speed and high speed of the engine.

Abstract: A metal batch preheating method comprises positioning an elongate mass of metal scrap on a conveyor in a tunnel furnace for heating such furnace having longitudinally spaced transversely extending zones of greater and lesser heat, the conveyor being loaded with metal for the length of the tunnel furnace except for the last heat zones therein. The metal is thereafter moved through a plurality of "advance and heat" movements in the furnace during the batch heating cycle so that the metal is exposed to both greater intensity and lesser intensity heat zones as it is preheated after which the metal is discharged for use or further processing.

Abstract: A bow drawing indicator for attachment to a bow and including a switch device having a spring operating arm extending therefrom for movement in one direction to successively contact and close two different circuit contacts, a flexible member connecting said arm to said bowstring to move said operating arm to circuit closing positions with drawing movement of said bowstring, a pair of indicator lights, and power circuits connecting individually to the lights to actuate one light on partial tensioning of said bowstring and to actuate the second light on continued drawing of said bowstring.

Abstract: The combination of an electrical outlet box with an under plate wherein the outlet box has end walls and side walls and the under plate is a molded plastic insulator panel having a center tubular portion sized for telescopic engagement with the outlet box, the center portion being a continuous wall defining an open center area in the plate, and the plate having a continuous peripheral portion for engaging a building surface when the outlet box is positioned in a hole in such surface, and the center portion insulating terminal portions of an associated outlet receptacle.

Abstract: A flame retardant synthetic rubber composition for use as a flooring material including a high bound styrene resin polymer and known flooring compounding ingredients. A hot emulsion SBR polymer, antimony oxide, a chlorinated paraffin hydrocarbon and hydrated alumina are present and the composition also includes a high flash point naphthenic oil.

Abstract: A ski attachment for a motor bike or the like for use to replace a front wheel of a vehicle having a pair of parallel front support arms that normally operatively position a wheel at the their lower ends. The attachment includes a support sleeve adapted to be positioned and supported by the support arms at their lower ends, a pair of skis, and reenforcing members secured to and extending between the support sleeve and skis to form a unit therefrom.

Abstract: This invention is directed toward making hollow racquet ball balls. This is accomplished by molding a mass of vulcanizable elastic material to hollow semi-spherical form and heating the bulk of the material substantially fully to vulcanize it while simultaneously cooling a portion around the full edge so it is only partially vulcanized at the edge area thereof. Then two of such semi-spherical forms have the edges thereof abutted under some pressure to force the uncured edges together, and heat is then applied to the uncured edges of each half to fully vulcanize them and bind them together to form a unitary seamless ball thereform.Apparatus for forming the balls includes mold means defining a hollow semi-spherical cavity with a cooling chamber being provided at the open edge of the cavity that defines an edge of the formed hollow half sphere whereby a cooling medium can be circulated at the edge to prevent vulcanization thereof while the remaining part of the hollow half sphere is heated and vulcanized.

Abstract: Apparatus for conducting secondary tests for security validation are presented. In one embodiment of the invention a light source, either infrared or visible, is cast upon two neighboring areas of a paper purported to be a valid instrument, these areas being of different light reflective characteristics. Photo cells are maintained in close juxtaposition to each of these two areas and the light reflected therefrom or passed therethrough is sensed by the photo cells. Comparator circuits are interconnected with the photo cells and, in part, determine the validity of the instrument on the basis of the comparison of the intensity of light reflected by each of the two areas. In another embodiment of the invention, a reference reflective surface is provided in juxtaposition to one of the photo cells to test those instruments not having neighboring areas of different light reflective characteristics.

Abstract: An insert sleeve for use in the firing system of a muzzle loading gun wherein the insert sleeve has a bore operably connecting the atmosphere to the bore of the gun barrel and having a conventional firing member operatively associated with the outer end of such insert sleeve. A nipple formed from a heat resisting metal is positioned in the sleeve at the inner end thereof and has a smaller diameter center portion than any other portion of the bore of the sleeve to form the limiting size connector opening from the firing means to the muzzle loader bore of the gun barrel.

Abstract: A W-N gear which has a surface strength at least nearly maximized for a given addendum and minimum pressure angle is realized by selecting a mean radius for the convex and concave circular arcs of the tooth profile in an appropriate range. Also, a dual=line mesh W-N gear of the character described which has a requisite face width minimized is obtained by selecting a mean arc radius which lies in the range referred to above and enables the addendum and dedendum points of meshing contact to appear at equal angle intervals.

Abstract: An arrangement for assisting access to a high rise building in the event of fire within the building in which chains are secured to a movable frame so that when the apparatus is in an extended position, the chains hang well away from the face of the building, and a cabin can engage the chains which can be held stabilized by downward tension, and the cabin being self-climbing, can provide the said access to the building.

Abstract: A lightweight, segmented, easily assembled aircraft having a hollow fuselage tube, upon which the cockpit, wing, empennage, landing gear, engine, and shell segments are supported and secured, is presented. The wing construction aerodynamically extends the effective wingspan of the aircraft and stabilizes flight by including an aileron slot, which rams positive pressured air from the lower surface of the wing over the upper surface of the wing to laminarize the turbulent air near the ailerons, and including an end plate, which is toed-in and canted towards the upper surface. A fore shell segment separates from and moves fowardly of a fixed, aft shell segment along a track apparatus, secured to the hollow fuselage tube, to permit access to the cockpit of the aircraft.

Abstract: A rotary distributor arm comprising improved distribution nozzles and flow control accomplished by a gradual taper of the arm itself is defined which ensures a uniform flow distribution across the full radius of the distributing medium so that uniformity and optimum economy and efficiency are achieved with respect to the trickling filter itself because a uniform fluid flow is distributed across the entire top surface thereof.

Abstract: The trans-clutch torque converter of the invention includes a pair of parallel input and output shafts having pairs of interengaging input and output gears on the shafts together with pairs of idler or transfer gears positioned on the shafts between the other pairs of gears thereon and with hydraulic pressure fluid galleries being formed in the housing chamber and with the speed output of the converter being determined by the interengagement and relationship between the gears on the input and output shafts, the improvement comprising using special herringbone gears and side pressure vanes slidably positioned in the housing to move axially thereof for maintaining pressure engagement between the sides of the gears on the input and output shafts after wear thereof, and wherein the gears each have a recess formed in one side face thereof connecting to a hub opening to transmit pressure liquid to the support shaft and a pressure relief orifice therein to aid in controlling the gear interengagement and speed contro

Abstract: Apparatus for supporting different nets for various sporting purposes including interengaging tubular rods which are arranged to interconnect and have ground engaging portions suitable to be useful for the several functions. The frame of the net support structure includes a pair of spaced apart, vertically extending posts; each of the posts is divided into a pair of telescoping sections. An upper horizontally extending multi-section member extends and connects the upper end of the vertical posts. A U-shaped clip is provided to engage the frame support with resilient holding pressure for supporting a net on the frame.