Abstract: A specially designed first adaptor or connector is permanently attached to a blood source secured from a donor and kept at a hospital blood bank. This first connector is color-coded and has the type blood in the source imprinted thereon. Further, it includes a blood carrying projection of given dimensions. A second connector, in turn, is permanently secured to a blood infusion line or tube leading from a potential recipient or patient's vein. This second connector is also color-coded and provided with an imprint of the patient's type blood. Further, the connector includes a blood receiving bore of given dimensions, the color coding, printing of the blood type and the given dimensions for the second connector being determined by the blood type of the patient.

Abstract: The shoe sole can either be external or constitute an inner sole to be received within the shoe. It includes a supporting pad having a plurality of circular recesses formed in its underside. A like plurality of identical individual enclosures of resilient material cover the recesses. Each enclosure comprises a series of annular walls successively axially spaced from the recess associated with the enclosure and having successively decreasing diameters, the walls being in partially nested relationship and connected together by a thinner portion of material. The arrangement is such that the enclosure or air chamber will collapse in a telescoping manner wholly within the recess of the pad when walking pressure is applied to the enclosure. Air can escape from each of the enclosures through specially designed openings. The repetitive compression and expansion of the enclosures with each step results in a shock absorbing and cushioning action by the sole.

Abstract: The sling-shot apparatus includes a handle with lateral arms to which an elastic cord is attached to form a sling. A projectile holding member is connected to this sling and also, a guide structure provided for guiding the movement of the projectile holding member along a rectilinear path when the elastic cord is stretched and released. Sighting members can be provided on the guide structure so that much greater accuracy is possible with the sling-shot.

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 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 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: An optical encoder for providing an electrical signal having a frequency corresponding to the revolutions per minute of a motor shaft comprises a mounting member for securement to the motor, a shutter element for securement to the motor shaft and a top cover secured to the mounting member to sandwich the shutter therebetween. A photo cell is provided on the cover and a lamp housing providing a light source on the mounting member for shining light through the shutter to the photo cell. Rotation of the shutter then modulates the light beam to provide the desired signal. The lamp housing itself incorporates a built-in reflector with light bulb and is so designed as to be replaceable with respect to the mounting member so that heretofore provided lenses and the like are no longer necessary and the mounting arrangement is such that alignment accuracy with the photo cell is assured.