Abstract: A tool head is separably attached to the end of a hollow well drilling string for cutting operations within a well and for detachment of the cutting head from the string without removing the string from the well. The head is attached by a ball clutch structure having a pressure responsive release mechanism responsive to an actuating pressure on the release mechanism to release the cuttiong head and the release mechanism from the string, the release mechanism having an upwardly open passage and a downward flow permitting check valve for passing cutting fluid from the string through the passage to the cutting head. Release is effected by dropping a sealing member down the drill string to close the passage and by an increase in fluid pressure above the sealing member and the release mechanism.

Abstract: A device for use by weightlifters for supporting a substantial weight, specifically a barbell, across the shoulders of an individual wherein the majority of the weight is transferred to the individual's hips and legs to avoid any strain on the back. The supporting device comprises a waist or hip belt, tubular support members extending generally vertically from pivotable mounting points at either side of the belt and shaped to curve around the user's back, a transverse channel cradle member with upwardly open U-shaped cross section extending between the upper ends of the support members to form an adjustably shaped frame. The tubular members are adjustable to vary their length and the distance between their lower ends to fit the user.

Abstract: A construction of book or game board with an open and a closed configuration, made of individual leaves in which the leaves have substantial thickness and in which the outline shape of any individual leaf is defined in essentially two dimensions. The two dimensional shape or size of the leaves varies from one leaf to another so that the closed book is in the form of a distinct three-dimensional sculpture with a recognizable shape. The leaves may be foldably connected so that in the open configuration of the structure, the leaves are capable of lying in a single plane.

Abstract: A combined collapsible beach table, dolly and sled structure having a flat smooth table-top surface slidable over a sandy beach when the table is inverted and having recessed wheels with rolling surfaces projecting only slightly from the sliding surface to rollably support the inverted structure on a hard smooth surface. A pair of folding dual-leg members are extended to support the structure as a table and to retain loads thereon when the structure is inverted and used as a sled or dolly. The dual-leg members are folded against the table top to form a compact storable structure. A detachable pulling handle is storable in the compact folded structure.

Abstract: A heat-intercepting shield or shroud in the form of a garment, blanket or belt having on at least one surface thereof one or more pockets to receive replaceable packets of refreezable material which absorb large quantities of heat as the material melts. Each pocket has two coextensive fabric layers stitched together to form opposite pocket walls. Over the entire pocket area and next to the one wall are coextensive layers of non-breathable continuous reflective material and of insulating material. These materials are flexible and are stitched next to that one pocket wall in seams at the edge of the pocket so that both heat reflection and retardation of heat flow by the insulation occurs over the entire pocket area. Between the layer of insulation and the other pocket wall is a space for a heat absorbing packet or packets of frozen gel. The side of the shield or shroud with the packet or packets is placed toward the object to be cooled or protected from external radiant, conductive or convective heat.

Abstract: A clasp for the cords of a bola tie comprising two mating shell halves and a manually operable spring biased clamp disposed between the shell halves to provide an enclosed clasp which is releasable and which provides improved external appearance and mechanical function. The inner surfaces of the clasp which engage the tie ends are smooth non-abrading convex portions of toroidal-like surfaces and clasp the tie ends around an extensive part of the periphery of the cord and along extended portions of the cord. Although firmly clasping the cord ends the clasp may be forced along the cord ends without manually releasing the clamp.

Abstract: A device, suitable for household use, for the purpose of crushing ordinary aluminum beverage cans between a movable and a stationary compression plate. The movable compression plate moves generally parallel to a can's axis, initially engaging the can at an edge thereof to apply crushing force along one side of the can and tending to overcome the can's structural integrity. The movable plate rotates slightly as it moves through a compression stroke. At the end of the stroke the two compression plates are parallel to one another and spaced apart sufficiently to (1) make the crushed can as compact as possible and (2) to minimize the possibility of injury which might result from, for example, closing the plates on human fingers when a can is not in place. The operating portions of the device are mounted to a back plate which is sufficiently long to provide leverage to allow the device to be operated without being mounted to a surface such as a wall.

Abstract: Individual electrically heated mats, self-regulated by use of an electrical element whose resistance varies proportionately with its temperature, used for covering walking areas to prevent accumulation of snow and ice. Each mat is provided with male and female electrical connections on the ends of short power cords to permit any number of mats to be chained together in electrical parallel and to be used to cover, for example, a flight of stairs by positioning one mat on each stair.

Abstract: A simple, lightweight, easily assemblable, disassemblable and transportable frame and motive means which can be attached to a wheelchair to enable a user having a lower body disability to safely move to and from a standing position without assistance from another person. The device provides braces against horizontal movement of the user's knees and hips when standing to allow the individual's skeletal structure to support the majority of the individual's body weight. The device utilizes a manually operated worm gear mechanism to provide a mechanical advantage in lifting and security against undesirable reverse movement of the lifting means when under load.

Abstract: A game apparatus and related methods of play, comprising a playing board marked with a grid pattern, checker-like pieces to be moved upon the surface of the playing board and using varied markings upon the faces of the pieces and a deck of numbered cards. The methods of play are directed toward the encouragement of the use of arithmetic skills. To begin play, players possess numbers by randomly selecting the number cards, the players then choose an arithmetic function of addition, substraction, multiplication or division which are applied to the randomly selected numbers to determine the direction and quantity of movement of pieces on the playing board and to modify the score of each player.

Abstract: An improved climbing anchor utilizing multiple cam elements in which each cam element is independently spring biased by a flat spiral spring located within a recess in the cam element and acting between the pivot mounting and the cam element. The construction provides a more compact camming head assembly, a stronger climbing anchor, more positive action of the spring biasing means and an improved visual appearance.

Abstract: A bicycle frame made essentially entirely of an integrally bonded composite structure throughout its main structural tubular members and at the joints securing these tubular members to each other. The tubular members, which have round and aero cross sections, and the joints are laid up using layers and strips of high strength resin-impregnated unidirectional carbon fiber fabric. A non-compressible filler material is added at the joints to support the carbon fiber fabric so that its outer surfaces are all non-concave wherever possible.

Abstract: A climbing device having an anchoring head on the end of a flexible main cable for insertion into a crevice in a rock wall. The head has multiple spring-biased cams which are wedged by a camming action into engagement with the walls of the crevice by pulling on the cable. For placement, the cams are actuated against the spring bias by an elongated flexible sleevelike structure coaxially supported and slidable on the cable. The sleeve structure has at one end a first plate connected by small flexible wire-like members to the cams for operating the cams against their spring bias.

Abstract: An improved construction of sandal type footwear wherein adjustment of a continuous foot retention strap within the sole of the sandal is attained by incorporating a porous, disintegrable or partial adhesive barrier which allows assembly of the sandal without permanently fixing the strap into position, and an adhesive which allows readherence of the straps after they have been adjusted so as to prevent undesirable slippage of the straps through the sole assembly.