Abstract: A film positioning system for dental X-ray and digital radiography procedures including a number of film or digital sensor carriers (bite wing, anterior, etc) each including a film or sensor holder on one end and an extending attachment rod, and an X-ray tube aiming device including an attachment rod holder, the attachment rod and the attachment rod holder keyed to correctly align the film holder with respect to an X-ray cone or tube. One example includes a non-equilateral pentagon shaped rod holder receptacle and a non-equilateral pentagon shaped attachment rod.

Abstract: An adjustable tension fastener which consists of a rigid loop-hook having a rigid loop member and a rigid hook member and a flexible cord connected to the rigid loop member by a pull-through knot for defining a tension portion and a reserve portion of the cord. A binder is used for selectively adjusting the length and tension of the tension portion and securing the rigid loop-hook to a portion of the flexible cord.

Abstract: An electronic multiple game device includes a body member having a main well and battery and circuit housing wells. A game board separably includes a bottom substrate having imprinted interdigitaling branched first and second contacts, an indexed paper program panel overlying the substrate and adapted to be conductively marked at selected areas to provide bridge conductors which, when pressed, complete a circuit between the contacts, a game representing paper panel overlying the program panel and an erasable pencil markable transparent flexible plastic panel overlying the game panel. A transistorized switch circuit which can be preassembled or assembled by the user includes the LED in its output and its input is connected between the contacts, the circuit including a punched PC board or peg board with the circuit component leads engaging proper peg board apertures and locked and interconnected by cup shaped brass plugs engaging the lead occupied apertures.