Abstract: A transparent display case comprising upper and lower panels, and four side panels, where the upper and lower panels are grooved to receive edges of the side panels, and four rod-like members extend between the upper and lower panels at the vertical edges of the side panels and hold the edges of the side panels in the grooves.

Abstract: A toy projectile launcher having a barrel and having front and rear ends formed of a tubular resilient material defining a bore and having the rear of the barrel sealed with a plug member. A projectile having a diameter at least as large as the bore of the barrel is inserted in the front end of the bore and is launched by striking the barrel intermediate the ends thereof to compress air in the barrel, producing launching of the projectile.

Abstract: A martial arts weapon having a multiplicity of blades and striking surfaces and further providing a trap for grasping a stabbing blade of an opponent.

Abstract: A boresighting instrument which comprises a muzzle end adapter having a frustro conical outer periphery adapted to be inserted into the muzzle end of a barrel threadably receiving a central shaft, a sleeve is coaxially coupled to the muzzle end adapter and extends to a radially extending member, the central shaft extends to the radially extending plate and has coupled thereto an expandable member comprising a plurality of rigid finger members equiangularly disposed about the axis of the central shaft and secured together by an elastomeric material, the fingers of the expandable member have frustro conical inner edges, an expander member is secured to the central shaft and has a frustro conical surface adapted to engage the inner edges of the fingers whereby when the central shaft is rotated in one direction on the threaded connection with the muzzle end adapter, the expander member forces the fingers radially outwardly into engagement with the inner periphery of the barrel.

Abstract: A display case with shelves for supporting transparent display and dispensing bins, and the display case defines unclosed windows in the front thereof. The bins are supported on the shelves with the front walls thereof forming a closure for the open window and presenting the merchandise in the bins. The bins are generally of L-shape in side elevation having a tall forward hopper portion and a rear dispensing tray portion. The bins may be individually removed for refilling and returned to the display case. The display case and the bins are formed to provide an attractive display of the merchandise.

Abstract: A compact projection lens for a cathode ray tube comprises from the image end, a first group of positive power which corrects aperture dependent aberrations, a second positive group and a third group which corrects for field curvature and distortion. A mirror is inserted between the first and second groups to fold the optical axis.

Abstract: A catadioptric lens where the primary and secondary lenses are fixed in relation to the image plane and focusing of the lens is accomplished by movement of a refractive lens group positioned subsequent to the mirror system in relation to the object end of the lens.

Abstract: A fluid operated pintle assembly for rotatively supporting a reel where the pintle is carried on a piston within a cylinder and the piston is spring biased to a reel engaging position and retracted under fluid pressure only when a blocking mechanism is retracted. The blocking mechanism comprises a fluid actuated piston cylinder assembly having a stop member which may be received in a cavity in the pintle piston to permit retraction of the piston or inserted between the piston and the bottom of the cylinder to prevent retraction of the piston.

Abstract: An ignition system for a furnace or boiler where a predetermined number of firing pulses are generated between timing intervals to allow purging of the combustion chamber. If combustion occurs, the firing pulses are terminated. If combustion does not occur, after the predetermined number of firing pulses, the combustion chamber is purged and the system shut down.

Abstract: A zoom lens which will continuous close focus to a magnification of 1:4, comprising three groups where the third group from the object end is stationary, the second group moves axially to vary the equivalent focal length, and the first group moves axially in predetermined relation to the second group to compensate for the variation in focal length, and is also independently movable axially to focus the lens.

Abstract: A video game including a player operated device for controlling the velocity and direction of movement of a game object. The game player may generate a pulse train having a pulse repetition rate proportional to the desired velocity of the game object. A numerical value of the pulse rate as a function of a clock signal is established, and the numerical value is utilized to change the address of the game object in a video memory so that in successive frames of a video display the game object moves across the display screen.

Abstract: A zoom lens having a large zoom ratio and capable of close focusing comprising a first positive grouping movable axially for focusing, a second negative grouping, and a third positive grouping movable simultaneously with the second grouping, but in opposite directions to vary the equivalent focal length of the lens. The third grouping may have sub-groupings movable at different rates in the same direction.

Abstract: A match will sustain burning for a limited period of time comprising a splint having a combustible head and a cut-out extending defining spaced apart arms extending from adjacent the head to below any burn sustaining coating on the match.

Abstract: A container and dispenser for granular or powdered material in which the container has an upper aperture and dispensing orifices are defined by a flexible member which permits the orifices to be expanded with resulting contraction to break loose clogged material from the orifices.

Abstract: A flush bolt mechanism adapted to be mounted at the vertical edge of the inactive door of a pair of hinged doors. Means are provided to prevent damage to the mechanism due to misalignment of the bolt and the strike plate. All translational motion of the mechanism substantially takes place along a single axis except for the motion of activation.

Abstract: A door closing coordinator for a pair of oppositely hinged doors where closure of the inactive door withdraws a stopping member from a holding lever for the active door and permits the active door to close after the inactive door. An override mechanism is provided to permit the active door to close first if a predetermined force is applied thereto to avoid damage to the active door.

Abstract: A coupling used between headers of adjacent collectors in an array of solar collectors of the liquid heat-exchange type to balance the flow of heat exchange fluid through the absorber of each collector. The coupling is formed with an internal baffle in which an orifice of predetermined area is defined dependent on its position in the array.The coupling may also be used to vent entrapped air from the headers and to drain liquid from them.

Abstract: A fluid operated pintle assembly for rotatively supporting a reel where clearance is provided between the walls of a pintle carrying piston and its cylinder and an annular diaphragm extends across the piston and cylinder in sealing engagement and extends down into the clearance.

Abstract: A microwave frequency transmitter which operates at low source voltages and which obtains a microwave frequency carrier through frequency multiplication of relatively low frequencies. The transmitter further includes transistor amplifiers which operate from an unregulated, decreasing source voltage, but are base current regulated to provide an essentially constant power output regardless of decreasing source voltage with operational time.

Abstract: A rack for supportively mounting a solar collector to a mounting surface to set the angle of tilt with respect to the sun. One end of the rack is adapted to provide predominant support of the collector, while the other end is height adjustable to provide the proper angle and to accept tension and/or compression due to wind leading.