Abstract: A display rack for video tape containers and other similar articles includes a support rack which is fixed to a support surface. A plurality of bracket members are connected to the support rack utilizing a combination of two opposing channels and two projections. The projections fit into the channels to join the bracket members to the support rack. Friction engaging elements are located on both the support member and the bracket members allowing for sliding of the bracket members along the support member but locking of the position of the bracket members on the support member by the frictional engagement of the frictional elements. The bracket members include opposing side flanges connected by a web with the flanges attaching to a back plate at an angle of, for instance, 45.degree. for optimum display of the articles supported by the display rack.

Abstract: A construction toy utilizes a plurality of tubular elements which are connectable to each other or are connectable to one or more hollow members. Each of the tubular elements has a first skirt on one end and a second skirt on its opposite end which are of the same size and are utilized to attach the elements to the hollow members. Further, attaching to one of the skirts on one of the ends is a smaller skirt which allows the smaller skirt to be attached to one of the skirts on a further of the tubular elements so as to connect two tubular elements together. The tubular elements have a plurality of convolutions which allow them to be expanded or contracted so as to lengthen or foreshorten the tubular elements as well as allowing the tubular elements to bend during the construction of structures with the components of the invention.

Abstract: An apparatus for processing radiation sensitive film, particularly dental x-ray film, has a housing with tanks located thereon capable of holding developer, fixer and wash. An arcuate shaped track is located on the housing in association with the tanks. A gear serving as a track follower moves across the track. A film holder is operatively attached to the gear at a point off center from the center of rotation of the gear. As the gear moves across the track, the film holder is moved in a pathway whereby it is immersed in the developer, in the wash and in the fixer tanks.

Abstract: A moving toy has a plurality of rotating elements located along opposite sides of its body. A motor is connected to these elements via a gear train so as to rotate the elements on the body. A plurality of sets of movable members each are capable of independently being connected to either the rotating elements or to both the rotating elements and the body. Each of the sets of the movable members when connected to the rotating elements are capable of moving the body in a unique manner which differs from the method of movement of any of the other of the sets of the members. The members can include eccentric rolling members, single walking members or compound walking members.

Abstract: A teaching toy has a housing with a viewing screen located in the housing. Positioned behind the viewing screen is an indicia carrier located on rollers. A plurality of indicia is located on the surface of the indicia carrier. By rolling the indicia carrier on the rollers, different portions of the indicia located on the indicia carrier are viewable through the viewing screen. Associated with the indicia carrier and located in front of it between it and the screen are a series of cover members which can temporarily cover a part of the indicia which is exposed through the screen. Operator actuators are connected to the cover members so as to allow the cover members to sequentially move from a position wherein they cover the indicia to a position where they no longer cover the indicia. By sequentially utilizing the actuator members, a child utilizing the toy partially uncovers the indicia, allowing the child to guess what the total indicia will be.

Abstract: An apparatus for use in oxygen therapy can be constructed so as to include a gas holder appearing more or less as a pendant which includes a variable volume internal chamber and so as to use a line for continuously delivering oxygen to the holder and a conduit for conveying gas between a person using the apparatus and the holder. During use on exhalation the initially exhaled gas will flow through cannula carried by the conduit and the conduit into the holder so as to expand the variable volume chamber. When it is filled the remaining expired gas will be vented to the ambient. As the holder is filled the expired gas within it will be mixed with a limited amount of oxygen and thereafter during exhalation the oxygen supply will displace the expired gas in the conduit so that it flows outwardly from the cannula to be picked up by the expired air being vented to the ambient.

Abstract: For use in combination with a pin-tumbler lock cylinder of the type having a key plug nested within a control cylinder which in turn is nested within a main body cylinder and including a plurality of bores extending through the key plug, the control cylinder and the main body cylinder with a pin-tumbler located in each of the bores, a measuring device for determining the pin-tumbler size for preparing a control key includes a body having a cylinder mating face and a probe which extends from the cylinder mating face. The cylinder mating face is mated against the outside of the main body cylinder with the probe positioned within the bore. When the interface between the driver pin and the control pin is located at the shear line between the control cylinder and the main body cylinder, the length of the probe which is accepted within the bore is an indication of the cut necessary for preparing a control key for the lock.

Abstract: A toy vehicle is supported on one end by at least one wheel and on the other end by a fly wheel which is capable of being energized by pulling a gear rack across a pinion which is connected to the fly wheel. On one of the side surfaces of the fly wheel, a material is located which, when contacted by a flint, is capable of emitting sparks. A flint holding member is positioned adjacent to the fly wheel with a flint located on the flint holding member so as to contact the material on the side of the fly wheel. In conjunction with rotation of the fly wheel, sparks are emitted from contact of the flint with the material. Thus, as the car is propelled across a support surface by the fly wheel a trail of sparks are given off.

Abstract: An oscillator includes two transistors or like devices having their emitters connected to a common of a power source. The two transistors or like devices are interconnected with the base of the first connected to the collector of the second and the base of the second connected to the collector of the first. An inductance is placed across the base-collector connectors and a circuit through the oscillator is completed via a lead to one of the base-collector connectors.

Abstract: A seat structure capable of being manipulated between a normal seat or chair position and a bed position can be formed so that the seat bottom and the seat back are used along with a base of the seat structure as parts of a five-bar linkage system. A structure is provided on the base and on the seat bottom for controlling the movement of the seat bottom and the other parts connected to it in this linkage system as the seat bottom is moved between the seat and bed configurations. Interlocks are provided between the base and the seat bottom for preventing up or down movement of the back of the seat and the seat back when the seat structure is in the seat configuration.

Abstract: An operable wall system which is especially desirable for use with large and/or heavy wall panels can be constructed so that each panel in the system is supported from a track structure by two separate trolleys. The track structure includes a terminal section having two parallel end sections joined to the main portion of the track structure through a junction. This junction is provided with cams which cooperate with differently oriented flange wheels on successive trolleys so that the panels can be moved between a position in which they are aligned with one another beneath the main portion of the track structure and a position in which they are suspended from the end sections and are located in side by side relationship.

Abstract: A container can be detachably secured to a holder carried by a belt through the use of coacting structures on the container and the holder which serve to prevent movement of the container away from the holder until an appropriate portion of the holder is manipulated so as to release the container. This combination of a holder and container can be effectively utilized to hold valuables during athletic pursuits or other underwater activities.

Abstract: Sericitic clays can be treated so as to produce silica gel and an adsorbent, absorbent product capable of being utilized in many different applications. In treating such clays to produce such products, finely ground clay particles are digested with an alkali so as to produce an alkali silicate solution which is separated from the remaining inorganic material. The latter is digested with an acid so as to remove alumina values. The particles remaining should then be washed and dried prior to being used as an adsorbent, absorbent material. The alkali silicate solution is preferably subjected to electrolysis to bleach contaminants within the solution and then treated with an acid so as to gel the silicate. After the gel is formed, the gel and the solution are neutralized. The gel is then separated and dried.

Abstract: A washing machine outlet box of the type capable of fitting within a wall and attaching to wall studs within this wall is improved by incorporating during the manufacture of said washing machine outlet box a disc as an integral part of the bottom wall, with the disc located over the future drain opening. The disc is attached to the bottom wall by a breakable or severable ring. After installation of the washing machine outlet box to an appropriate drain pipe, the disc serves as a plug for pressure testing of the drain pipe and further serves as a dam to prevent introduction of foreign material into the drain pipe during construction stages of the wall and the like. Upon completion of pressure testing and after completion of construction, a tab attaching to the disc is lifted upwardly so as to sever the ring attaching the disc to the wall to free the disc to form the drain opening in the bottom wall of the washing machine outlet box.

Abstract: An electrical solder pot has a base with a hollow interior. A housing member also having a hollow interior attaches to the top of the base. The housing member further includes an opening at its top. A threaded socket is fitted in the base so as to accept a heating element which is oriented vertically within the hollow interior of the combined base and housing member. The heating element includes a threaded connector positioned near the opening in the top of the housing and accepts a threaded solder container. The solder container attaches to the top of the heating element and is positioned above the opening in the housing. The heating element includes an internal thermal conducting member located within a tube with an appropriate socket connector on the tube so as to connect to the socket in the base. A monolithic burnt ceramic heater is positioned within a cavity in the thermal conducting member.

Abstract: A dental pantograph capable of measuring mandibulary movement includes right and left side housings have orthogonally located X, Y and Z scales. The housing further includes X, Y and Z scale transducers for reading reference marks on the respective scales. The scales are slidable with respect to the transducers. The housings are located adjacent to engagement members with one of the housing or the engagement member associated with the mandible and the other associated with the maxilla. The scales extend between the housing and the engagement member and move with respect to the transducers in the housing by movement between the housing and the engagement member. The transducers produce electrical output signals which are fed to an appropriate signal processor, such as a microprocessor, for producing a readout indicating the mandibulary movement.