Abstract: An early age abacus type teaching device comprising a rod having movable counters thereon with corresponding sequentially spaced numerals therealong whereby the numerals are utilized to represent the calculation of the preceding manipulated counters and the rod is equipped at each end thereof with a device to support and hold the same upon a horizontally or vertically disposed surface.

Abstract: This invention relates to a dual fuel engine cylinder with primary interest focused upon an injector valve for an alternate fuel in which the body of the valve is disposed into said cylinder through the head thereof and may be removed therefrom as for servicing without disturbing the remaining operation of the cylinder.

Abstract: A golf ball retrieving device to withdraw a golf ball from a water hole providing an extensible reach and an expandable cage to receive a golf ball for recovery by the operator, the cage having inwardly angled end forming pockets to receive and securely hold a ball and having a self holding member for operating the expansion and retraction of the cage.

Abstract: A single layer protective cover of a flexible synthetic leather-like material resistant to automotive chemicals and having a smooth cushioning non-slipping non-scratching inward or under surface of a length and width to cover an automotive fender adequately for its protection against scratches while a technician is working under the raised hood of the automobile and flexible means having terminal hooks to secure said cover.

Abstract: This device relates to a pneumatic control system and more particularly to an annular slit restrictor in connection therewith and a method for precisely centering an annular plug within an accurately formed annular hole in a flow control body in a shrink fit operation to cause the plug and hole to be co-axial.

Abstract: This invention relates to an improvement in an evacuating apparatus attached to an air cleaner such as of an internal combustion engine as in connection with a farm tractor or an industrial engine operating in a dust laden environment where the contaminants drawn into the air cleaner are evacuated by the apparatus herein. The improvement consists in having a more positive evacuation of air transported contaminants in particulate form and evacuated with said contaminants are airborne particles of moisture carried with said contaminants. Comprising the apparatus of the invention is a small sized motor driving an impeller having vanes sweeping through a trough in the direction of exhaust, there being no return passage to the air cleaner.

Abstract: An automated robotic quick change force controlled arbor device particularly to apply a sanding disk to surface finish metal and an automatic replacement of the disk.

Abstract: A reuseable self securing plastic holding device for mounting onto a smooth clean polished surface and having a particular physical arrangement which absorbs and dissipates the sheer forces exerted thereupon by a held object.

Abstract: Relates to the regulated control of a surface treating work wheel such as for deburring, finishing or polishing a surface wherein a predetermined rate of speed and pressure of said wheel upon a surface is maintained for uniform results.

Abstract: A device disposed within a monitoring well in a fuel filling station environmental area to collect for withdrawal from said well fuel leakage from reservoir or storage tanks present in the area.

Abstract: A suspended sign hanger die cut from a blank with appropriate creased lines to be folded into a device having walls of narrow width and a pair of spaced pegs projecting outwardly of each wall onto which are mounted poster type signs extending beyond the length of each side of said device with a mutual yielding of their interengaging extended portions to respectively define substantially concave outward surfaces.

Abstract: A hand operated grenade launcher having a multiple round detachable magazine positioned to overlie the launcher barrel and to cooperatively deposit a cartridge in firing position, the launcher having a gas operated delay blow back action which automatically ejects a fired cartridge and actuates the deposit of a live cartridge in firing position in connection with the magazine.

Abstract: An apparatus to mix printing inks consisting of a mixing container having a single power source for rotating the container and the mixing blade therein with an automatic safety power shut off upon detachment of the mixing blade and a guard member about the rotating container.

Abstract: A lumbar region yielding support device adapted to be adjustably body positioned to be body worn or adjustably positioned attached to a seating structure.

Abstract: A door latching assembly in which the latch operator has a unique camming member which retracts the latch member upon operation of the latching handle member, the cam action is one of rotation having a rolling contact with a spring loaded sliding fork member whereas the rolling cam and its contact point on the sliding fork after very appreciable usage shows no indication of wear.

Abstract: The invention is directed to reducing unburned hydrocarbons during engine idling. During idling, one cylinder bank of an engine is alternately deactived by fuel cut-off structure with another cylinder bank. Therefore, one bank works twice as hard and consequently produces much lower emissions. A timer alternates between the cylinder banks anywhere from fifteen seconds to four minutes.

Abstract: An erection of triangular spaced ground implemented metal rods embodying a plurality of tiers of vertically spaced ring members removably engaging said rods to secure the same in forming a stable structure.

Abstract: An arithmetic teaching device consisting of a rod having hand movable spaced collars slidable thereon and having sequentially spaced numbers therealong corresponding to the collars whereby the numbers indicate visually the arithmetic calculation of preceeding manipulated numbers.