Abstract: A game of chance includes a game board with a plurality of sections thereon, wherein the sections are labeled with various indicia, or combinations thereof, and odds pertaining thereto. A chance indicator device for simultaneously selecting one such indicia and a game command. The device includes two sections rotatably joined together, wherein one section is friction fit about a shaft so that it cannot rotate relative thereto, and the other section is rotatably mounted to the shaft. Both sections are identically shaped so that they may be interchangeably mounted on the shaft either by themselves or in combination, one section containing indicia on its faces and the other section containing game commands on its faces. The device is spun on the game board so as to select the indicia and/or game commands.

Abstract: A trailer with loading and unloading capability. The trailer has side members, but is open at the rear, so that it may be backed into a position with the load between the side members. There are beams along each side member which can be lowered to receive crossbars passed under the load. Means are provided for lifting the beams and the load, supported by the crossbars, into a hauling position. The trailer has columns rising from the side members and brace members interconnecting the columns, which make the trailer strong even though it is open at the rear.

Abstract: A potentiometer and switch assembly wherein the potentiometer resistance is deposited on a circuit board. The control member of the assembly comprises a shaft having a rotor mounted thereon, attached to which is a wiper for contacting the resistance. The switch mechanism includes a cam shaft adapted to be engaged by the rotor whenever the control shaft is pushed. The cam shaft is positioned to the side of the rotor and is rotated through a predetermined angle each time the control shaft is pushed. Camming surfaces on the cam shaft contact one member of the switch contact pair to alternately cause that contact pair member to open and close the switch. The cam shaft may be arranged to contact a second switch contact pair which opens and closes oppositely to the first switch contact pair so that a three-way switching function may be effectuated.

Abstract: An improved electrode for electrically heating a subterranean formation includes a plurality of electrically conductive rod-like members that extend outwardly from a central well bore to provide increased area for conducting electrical current from a source into said subterranean formation. The improved electrode apparatus is adapted to be lowered into a well bore which has been drilled into the subterranean formation and, thereafter, the plurality of rod-like members are driven outwardly from the central well bore. Guide means are provided to direct the rod-like members outwardly into the subterranean formation as a central member is forced downwardly.

Abstract: Explosive compositions, sensitive to a number six blasting cap, comprise a liquid, highly combustible fuel and supported air entrapment material in an amount such that from about one to about 95 volume percent of the total explosive mixture is air.