Abstract: A halter for horses wherein the halter includes a headstall composed of a strap encircling the forward portion of the neck at the head, the strap being provided with a conventional buckle or other separable securing device, and the encircling strap of the headstall also having, operatively coupled in parallel with the conventional buckle, a separable fastener which is disengageable under the influence of a predetermined amount of force tending to separate the encircling strap portions.

Abstract: A tool for molding damp sand or other capillarily held insoluble granular material is disclosed. The tool is capable of forming a channel in a mound of material or removing a block of material from the mound. The disclosed mold of the preferred embodiment has flexible walls which can be moved back and forth to prevent adhesion of the granular materials to the walls of the mold and to facilitate easy removal of the mold.

Abstract: The invention disclosed by this application relates to a device for producing, preserving and displaying a bubble which comprises a casing which is at least partially transparent, a bubble forming conduit mounted within the casing and having an inlet and a bubble forming outlet, means for applying a bubble forming film to the outlet, and pressurizing means for increasing the pressure within the conduit to a point greater than the pressure within the casing, so that a bubble forms on the conduit outlet.

Abstract: A doll and an eye assembly, intended for use in a doll, wherein the assembly comprises a combined representational eyeball and eyelid movable mounted relative to a carrier or retainer, and weighted, in such a way as to tend to occupy a first positional relationship with the carrier or retainer (such as "open") in one attitude of the assembly to the horizontal but to occupy a second positional relationship with said carrier or retainer (such as "closed") in a different attitude of the assembly to the horizontal. The assembly also includes a fluid pressure actuable control operable to displace the combined eyeball and eyelid from said first "open" positional relationship to said second "closed" positional relationship.

Abstract: A changeable display includes a sheet containing a number of joined frames, each having a display on opposite sides. The sheet is wound on a pair of take-up rollers having parallel axes separated by one frame. A separate idler roller for each take-up roller is arranged so a nip is formed between each idler roller and its associated take-up roller. A motor-clutch arrangement selectively drives one of the take-up roller to transfer the sheet between the take-up rollers. Each idler roller is urged toward the periphery of the wound material on its associated take-up roller while the sheet is being transferred between the take-up rollers to maintain a constant separation nip between each idler roller and the periphery of the sheet on each take-up roller. A housing for the sheet, rollers and motor-clutch pair of includes a pair of windows on opposite sides of the sheet.

Abstract: A game comprising an air tube transportation system energized by a unique air pump system. The air pump system includes an air pump manifolded into a plurality of tubes wherein each of the tubes is selectively connected to the air pump through individual valves which control the direction and force of the air flowing through the tubes.

Abstract: A ducted fan engine for model aircraft which is powered by a conventional model piston engine. The engine is mounted in a hollow portion of an inner core body and drives a multibladed fan. Two sets of stationary vanes are attached to the core body and a cylindrical shroud, fitted over the assembly, is attached to the outer ends of the vanes.

Abstract: A writing instrument comprising a ballpoint pen assembly, a holder for the assembly having two substantially flat surfaces in opposed parallel relation, the thickness of the holder ranging from about 1 to about 4 mm, the ballpoint pen assembly being accommodated in an elongated channel in the holder with a writing tip projecting outwardly therefrom, the flat surfaces having a width at least about ten times the thickness of the holder. The flat surfaces have indicia or the like thereon applied by imprinting one side only of an elongate web, folding thereof to envelop the holder and die-cutting into a desired configuration.

Abstract: A mounting device for use in mounting a dental cast of a patient's maxillary teeth in a dental articulator including a removable yoke like bracket for mounting a face bow on the articulator.

Abstract: An encapsulated adhesive is disclosed for use in fastening denture plates as well as a method for fastening denture plates by use of the encapsulated adhesive. A capsule which dissolves upon contact with the human skin contains a predetermined quantity of solid adhesive. When denture plates are to be fastened in the mouth of a wearer, a capsule containing the adhesive, preferably a capsule which has been softened in a moisturizing container, is placed between the denture plate and mouth after the plate has been loosely seated in its approximate final position in the oral cavity. When pressure is applied to the dental plate and the capsule is compressed, liquefaction of the capsule causes the adhesive to spread between the denture plate and supporting tissue of the wearer.

Abstract: A flying toy of the boomerang type having two airfoil arms extending horizontally from a center portion. Each arm carries at its outer end a horizontally disposed, annular-shaped stabilizer having a horizontally disposed outer periphery whose diameter is approximately twice the horizontal width of the arm at the juncture of the arm and the stabilizer, and having an inner periphery which is disposed in the same horizontal plane as the outer periphery, and which defines a center opening through the stabilizer. The stabilizer has a convex top annular surface and a concave bottom annular surface extending between the inner and outer peripheries. During flight, the stabilizers serve simultaneously as airfoils, airfoil arm stabilizers, and a gyroscope for the flying toy.

Abstract: A unitary molded plastic bee frame including a molded plastic honeycomb foundation, and wherein integral ears are formed on and project laterally from opposing upper ends of the frame bars, with the ears having thin top and end walls, a thickened midrib extending endwise thereof, and a thickened lower wall projecting through the end frame bars acting as a brace and reinforcement for the ears. An angled brace projecting between the lower and upper ear walls additionally strengthens the ears so they will support the frames in a super to prevent detachment thereof and dislodgement of the frames. The lower ends of the frame end bars are reduced in width by notching to enable vertical alternate stacking in cartons to increase the number of frames per carton and decrease the weight thereof.

Abstract: A surgical bone operation instrument that has a straight tube-shaped shaft and arrangement coaxially in relationship to the longitudinal axis of the instrument to form a continuous channel from one end of the instrument to the other including the end parts, which serves for the guidance of materials utilized in the operation of the instrument, and a driving assembly being of a bell-type electrical motor with the stator enclosed within the bell-shaped rotor, the latter having windings of lacquered wire embedded in a plastic material, the windings further being wound to form a hollow cylinder of relatively thin wall thickness to form a part of the bell-shaped rotor, the mechanical structure of the rotor being furthermore reinforced by glass fibers.

Abstract: A surface decking or mat-like sheet material is provided having a lower surface with generally flat portions adapted to lie on a floor, ground or other generally flat surface, and an upper surface having a plurality of parallel spaced unidirectional recessed passageways separated by upwardly extending portions having spaced parallel unidirectional sides which also form the sides of said passageways, said recessed passageways having bottom portions extending between said parallel sides, the exterior sides of said bottom portions constituting said generally flat portions of said flat surface, said bottom portions containing a plurality of spaced openings extending through said lower surface, and said upper surface between said passageways containing a plurality of spaced openings having upwardly extending rims which act as bearing surfaces for animals, persons, or objects in contact therewith.

Abstract: A rectangular farrowing crate is provided with an elongated hollow feed tube arranged with its open upper end adjacent the rearward end of the crate and its lower end in communication with a feed trough situated adjacent the forward end of the crate whereby feed deposited in the upper end of the feed tube will move by gravity to the feed trough. A plurality of crates may be arranged inside a hog farrowing building in side-by-side relationship with their respective forward ends in substantial abutting relation to one of the sidewalls of the building with an aisle way extending through the building transverse to the crates and along the rearward ends of thereof.

Abstract: The insert is held in place by surrounding plastic filling material and improves resistance to abrasion. Bonding to the filling material is improved by impregnation of the insert with a wetting agent or filling material. The insert may be made by extruding a porcelain paste into the desired crossection segments. Porosity of the fired material is obtained by mixing a volatile binder, such as polyethelene glycol, with the ceramic powder. Acid treatment is also disclosed for providing the desired porosity.

Abstract: A twist-lock pin for improving the retention and resistance characteristics of plastic dental restorative materials and a wrench for providing positive control over the pin during insertion into the opening in the tooth. The pin is partially screwed counter-clockwise into a left-hand threaded metal cylinder, the wrench body. After two revolutions, the pin bottoms out against a flat ended, right-hand limiting screw which is inserted clockwise from the opposite end of the wrench body and which is limited by two lands, one a flat area in the wall of the wrench body and the other at the end of the wrench body. After the wrench has been utilized to insert the pin into the tooth structure, it is removed by relieving the pressure on the pin and unscrewing the wrench from the pin.

Abstract: A modular toy is provided in the configuration of a building, such as a doll house, formed of a plurality of modular units, each representing, for example, a room or a group of rooms. The modular units are constructed to permit them to be stacked one above the other and/or retained in side-by-side assembly so as to define, when so assembled, a simulated building. In one form, the modular units are molded of plastic with one or more walls thereof shaped to retain objects in place such as furniture, fixtures and appliances. In another form, the modular units are molded in a flat box-like configuration defining five walls of the room which are joined together by molded hinge-like portions permitting the flat molding to be folded into the configuration of the room shell which may also define the walls for the packaging of the unit.

Abstract: A marker sleeve assembly (1) comprising a plurality of marker sleeves (2, 3, 4, 5, 15 or 16) each joined to a longitudinal connecting member (6 or 6'). The connecting member is formed integrally with the marker sleeves and is attached to the outer wall of each sleeve in the assembly. The marker sleeves are detachably joined to the connecting member so that an individual marker sleeve can be removed from the connecting member for application to an article.

Abstract: The invention is a saddle lock-up for flexible printing plates utilizing a plurality of radially and axially moveable sleeves contained within an inverted wedge-shaped opening.