Abstract: A pin hole type star globe of a planetarium is provided with star identifying means for intermittently interrupting light projected through a pin hole of the star globe to form a star image on a viewing screen, thereby causing a perceptible, identifying blinking of said star image. The star identifying means includes an occluding arm which may be caused to swing back and forth into and out of interference with reference to the projected light; such swinging being caused by electrical, radio frequency means, controlled by step operating switching means.

Abstract: One or both opposite side portions of an edge of a workpiece of sheet material are peened to smoothness by two coacting peening tools in the form of collars oppositely acting upon said side portions through coaction with a rotary hammer resiliently carried within a housing. The two collars are slidably and rotatively carried on a stem rigidly depending from the housing and are held on the stem by an adjustable nut at the bottom of the stem. A first one of said collars is vibratorily actuated through direct action of said hammer to peen one of said side edge portions of the workpiece while the other of said collars is actuated indirectly to support and/or peen the other of said side edge portions through vibratory reaction of the hammer to its direct actuation of the first collar, which reaction is effective through said housing and its said stem.

Abstract: A pulley arrangement is operable by a person located adjacent to a table to lower a food holding container into a refrigerated well in the table and to raise said container with respect to said well sufficiently to render the contents of the container readily accessible to said person.

Abstract: A single punch head is slidable along a multi-faced, rotatable, horizontal bar having different arrays of detents on its several faces; a spring-pressed ball coacting successively with the detents on any selected face of the bar to position the head for punching holes spaced correspondingly to the detent spacing on the selected face. The ball also serves to hold the bar somewhat yieldably in any of the plural face positions to which the bar may be turned.

Abstract: A relatively rigid linch pin having a portion of serpentine shape extending loosely through a transverse bore in a bolt, serves to oppose sliding of a collar or the like from the bolt; the serpentine character of said portion of the linch pin permitting easy sliding of said pin into said bore while opposing dislodgment of the linch pin from the bolt.

Abstract: An inverted, manually operable, cylindrical, inverted-cup-shaped valve element is turnable axially back and forth between an open position in which an aperture in said element's side wall registers with a fluid passage of a fixed central core of the valve and an opening in the housing of the valve to permit fluid to flow therethrough and a closed position in which a non-apertured portion of said element's side wall registers with the valve's said fluid passage and said opening to close said passage against flow of fluid therethrough. An operating knob is provided for manually turning said valve element, and means are provided for limiting the turning of said valve element to considerably less than a full turn.

Abstract: A drive shaft for turning wheels of a vehicle or for operating other devices requiring rotary driving motion, has a pair of diametrically opposed compressors non-rotatively mounted upon it and also a dual channeled turbine mounted upon it with a rotor of the turbine keyed to the drive shaft to cause said shaft to turn with said rotor; separate duct means being provided between the two compressors and diametrically opposite points of the turbine's two channels for conducting ignited gas from the compressors to the turbine to drive said rotor and the drive shaft. Each compressor includes a piston, gas intake and exhaust valves, and means for igniting compressed gas in the compressor to charge the ignited gas into the turbine.