Abstract: An improved instrument for preparing quality control solutions of liquid and gas for use in calibrating blood gas analyzers includes a gas inlet providing gas to a humidifier, a diffusion tube, flexible tubing connecting the gas from the humidifier to the diffusion tube and a temperature controlled environment for the diffusion tube. These standard components are arranged in a unique combination permitting the tubing connecting the outlet of the humidifier to the diffusion tube and the diffusion tube itself to both be replaced or individually replaced without disturbing the other components of the instrument. For this purpose, a metal heat block is used as the temperature controlled environment and is provided with an open top for receiving the diffusion tube. The humidifier and connecting tubing are exterior of the heat block so that the referred to replacement of the tubing can readily be carried out.

Abstract: The viewfinder of a conventional 35-mm. camera has a horizontal portion masked off by an appropriate insert so that the scene viewed has a length to width ratio greater than 2.0 to 1 and preferably about 3 to 1. This wide field of view corresponds to wide screen pictures such as cinemascope. Pictures are taken using the masked viewfinder and during printing of the film, the film gate in an enlarger is correspondingly masked or provided with an aperture of the same ratio as that of the unmasked portion in the viewfinder. Printing paper is provided with a proportional ratio so that the entire printing paper is used in printing the picture from the film. Pictures can thus be returned to the photographer which are of a substantially larger length to width ratio than conventional pictures, all to the end that elongated bodies such as ships or trains can be readily photographed holding the camera in a horizontal position, or, alternatively, tall buildings can be accommodated by holding the camera in a rotated 90.

Abstract: A total of thirteen identically appearing coins is provided in lieu of the usual twelve coins. Eleven of these thirteen coins are made identical in weight to result in eleven identical coins and two remaining coins. One of the remaining coins is heavier than any one of the eleven identical coins and the other of the remaining coins is lighter. These two remaining coins are undistinguishable from the eleven identical coins without some sort of the aid to the human senses. Such an aid is provided to enable separation of the two remaining coins from the eleven identical coins when they are all mixed up at the start of the game. One of the two remaining coins can then be added to the eleven coins to make up the necessary twelve coins to work the puzzle. The player does not know whether a lighter or heavier coin has been added and thus a new and challenging game is presented each time.

Abstract: The collating stacker comprises a hopper mounted for oscillation between first and second positions at right angles to each other. Individual microfiche are fed into the top of the hopper so that the microfiche can be received and stacked in the hopper to form a first set when the hopper is in the first position and a second set after the hopper has been rotated to its second position at right angles to the first position. By this arrangement, the first and second sets can be easily manually separated as they are removed from the hopper.

Abstract: The multi-purpose plumbing tool is designed specifically for use with copper tubing to enable cutting and preparation of cut ends and associated fittings for soldering on a job site. Basically, the tool includes a frame supporting a motor driven high speed circular pipe saw. A handle and pipe vise structure in turn is pivoted as a unnit to the frame in such a manner that a pipe gripped in the vise can be swung downwardly and forwardly into engagement with the circular saw blade and thereby cut. The same motor driving the saw blade is utilized to drive rotary wire brushes for cleaning the outside of cut ends of the pipe and the inside of fittings. Appropriate deburring and reaming operations are also performed by these rotating structures. Finally, flux applicator heads are provided to treat the cleaned pipe end surfaces and inside the fittings with appropriate flux paste preparatory to soldering, these flux applicator heads being held on the frame and supplied by paste from a cartridge carried in the frame.

Abstract: A device in the form of a collar has opposite end openings for receiving the neck end openings of two bottles such as ketchup bottles to hold them in axial alignment. With this arrangement, one bottle can have its ingredients transferred by gravity to the other bottle by standing the one bottle upside down on top of the second bottle. The collar device holds the bottle necks in proper alignment, so that the transfer of ingredients can take place.

Abstract: The entrance ends of a plurality of optical fibers are arranged in a circular array and each provided with light emitting material in the form of phosphor responsive to impingement of an electron beam. The circular array of the fiber optic entrance ends is scanned by an electron beam so that the light emitters are successively triggered, the time for light to travel the difference between successive light paths defined by the optical fibers corresponding to the time of scan from one light emitting phosphor to the next adjacent light emitting phosphor so that individual pulses of light exit from the ends of said fibers substantially simultaneously.

Abstract: The mounting member portion carrying the light source in an optical encoder assembly is properly centered on a motor casing with respect to the motor shaft by a centering fixture in the form of a disc-shaped element. This disc-shaped element has a central bore of diameter corresponding to the diameter of the motor shaft and an annular peripheral downwardly depending lip at a precise radial distance from the geometrical center of its bore. This radial distance corresponds precisely to the radial distance between the geometrical center of the mounting member and its circular periphery such that the disc-shaped element can overlie the mounting member with its lip engaged about the circular periphery of the mounting member and its central bore receiving the motor shaft. The geometry is such that the mounting member is necessarily held in a precise concentric relationship with respect to the motor shaft by means of the centering fixture in the form of the disc-shaped element.

Abstract: A compact welding wire feed device is provided capable of being mounted directly on a welding head carriage. The device comprises a ball bearing having an inside race with tangential entrance and exit guides to the race adjacent to opposite axial ends of the bearing. A hub member has an outside diameter less than the inside diameter of the race so that the hub member can be coaxially received in the race and a welding wire passed through the entrance guide and wrapped around the hub and out the exit guide. By now side-loading or expanding the hub against the inside of the race and driving the hub rotationally, the welding wire is continuously fed out the exit guide. The coaxial relationship of the hub and race provides for a very compact structure thereby permitting mounting of the wire feed directly on a welding head carriage adjacent to a weld head or even permitting the feed wire itself to be used as an electrode in a MIG welding system.

Abstract: A V-shaped element has a central bore at its vertex of diameter corresponding to the diameter of the motor shaft upon which an optical encoder assembly is to be mounted. The arms of the V-shape extend radially at 90.degree. to each other from the center of the bore at the vertex and terminate in engaging stops at precise equal radial distances from the center of the bore at the vertex. This radial distance corresponds precisely to the radius of the outside diameter of the circular periphery of the mounting member portion of the encoder assembly carrying the light source for the optical encoder. Exact concentric centering of the mounting member carrying the light source is maintained by the V-shaped element by engagement of the ends of the arms with the circular periphery of the mounting member while the motor shaft is received in the central bore so that the mounting member can be rigidly secured to the motor.

Abstract: The gear reduction system is of the differential type utilizing two ring gears with teeth on their inner circumference and first and second eccentric wheels having external teeth engaging the teeth on the ring gears as they roll about the inner circumference. The first and second wheels have their eccentricities mounted in an offest relationship so as to provide dynamic balancing during operation. By making the number of teeth on one of the eccentric wheels different from the number of teeth on the other, adding the second ring gear and providing appropriate pin carrier means coupled in a given arrangement, a very high gear reduction can be achieved in a single packaging. This gear reduction is equivalent to that heretofore only obtainable by ganging together separate reduction gear systems of this type.

Abstract: The gear reduction system is of the differential type utilizing two ring gears with teeth on their inner circumference and first and second eccentric wheels having external teeth engaging the teeth on the ring gears as they roll about the inner circumference. The first and second wheels have their eccentricities mounted in an offset relationship so as to provide dynamic balancing during operation. By making the number of teeth on one of the eccentric wheels different from the number of teeth on the other, adding the second ring gear and providing appropriate pin carrier means coupled in a given arrangement, a very high gear reduction can be achieved in a single packaging. This gear reduction is equivalent to that heretofore only obtainable by ganging together separate reduction gear systems of this type.