Abstract: This device employs an elastic, thin walled tubular member which can be a finger receiving and enclosing portion of a rubber glove or a rubber finger cot. The tubular member has a closed end for engaging the wearer's fingertip and an open end through which extends a flexible tube having a beveled end secured to the inner side of the closed end of the tubular member. The tube extends through a palmar portion of the glove or along the palm of the wearer of the cot, where an external portion of the tube is exposed for insertion of a biopsy needle. The tube has an axial passage through which a biopsy needle can be guided to pierce the closed end of the tubular member and a site inside a body cavity being palpated by the wearer, while the needle pierces the site to remove a sample of tissue to be examined after the needle is withdrawn from the tube.

Abstract: This cannula assembly for injecting medicinal fluid into an animal's teat has a first tapered cannula formed with a circumferential bead at its wider end. A flexible jacket encloses the cannula and has another bead detachably engaging the bead on the cannula. A tapered second cannula extends forwardly from the jacket. This cannula is shorter than the first cannula. A flexible cap has an internal bead which detachably engages a corresponding bead at the sider end of the second cannula. This assembly provides the user with a choice of cannulas of two different sizes in treating a teat. In another form of the invention, a second flexible jacket has a bead which detachably engages a bead on the second cannula. A third cannula extends forwardly from the second jacket. The flexible cap detachably engages a bead on the third cannula, so that the user has a choice of cannulas of three different lengths in treating a teat.

Abstract: This graphic character matrix display assembly has a support providing a nonreflecting background for a multiplicity of display units arranged for cooperatively displaying the character. Each of the display units comprises a flat display disk having opposite sides. An electromagnet rotates the disk between display position and reversed position. A light source projects a light beam at each disk when the disk is in the display position. The light beam also projects an outline of the disk by backlighting. A tab on each disk projects laterally in the plane of the disk to block the light beam when the disk is in reversed position. The light source may be a single incandescent lamp, plurality of lamps, a light pipe, light emitting diodes or a fiber optic light conduit.

Abstract: This invention involves connectors for vertical end rectangular grids having spaced pairs of vertical end rails joined to horizontal rods extending between the end rails with vertical spaced rails between the end rails. Each connector includes a rigid, flat plate formed with two or more horizontally spaced symmetrical notches. Each notch has a passage extending inwardly from an end edge of the plate. The passage terminates at two inner opposed concave lobes each of of which slidably engages a respective vertical end rail. The passages permit the plate to move beyond the horizontal rods when the plate is moved along the end rails. A third inner lobe between the two opposing lobes allows the plate to pass free projecting ends of plates can have two, three, four or more notches to hold vertical grids in free standing, upright angular arrays. Stop blocks can be placed below the connectors to hold them in desired positions on the rails supported by the horizontal rods projecting through the rails.

Abstract: This invention concerns a magnetic switch assembly used for switching input and output signals between coaxial transmission lines connected to a body having a closed cavity in which terminals of the lines are exposed. One or more conductive contact members, which are the only moving parts in the cavity, bridge one or more pairs of line terminals in closed circuit portion. The contact members are moved magnetically from open to closed position, and are latched or held failsafe by stationary permanent magnets or pulsed electromagnets. The contact members are moved to open position by pulsed electromagnets or rotatable permanent magnets. The contact members comprise magnetized strips, magnetic strips, or nonmagnetic strips carrying magnets or magnetic members. The assembly can be arranged for single or multiple pole, single or multiple throw switching.

Abstract: In this process a conductive first layer composed of finely divided metal and finely divided ceramic material in an organic carrier is applied to a surface of an unsintered ceramic body. The conductive layer forms terminations when the body, and the conductive layer are cofired to sinter and form a unitary, integral, monolithic structure. A second conductive metal layer may be applied to the first layer prior to cofiring to improve attachment capabilities of the component. Leads may be attached to the conductive terminations if desired.

Abstract: This improved heat dissipator for mounting a semiconductor unit is made of sheet metal laminated with eutectic metal coatings. The dissipator has a planar base, narrow platelike wings, springy tabs for engaging ends of the unit, and rigid laterally angled legs. The legs bond to laterally extending metal legs of the semiconductor unit.

Abstract: This dripless automatic syringe for dispensing fluids has a barrel for containing the fluid, a nozzle for discharging the fluid, and a housing to which the barrel is attached. A piston rod in the housing carries a rigid sealed piston head in the barrel for pushing out the fluid. Behind the piston head a normally unflexed elastic disc in the housing. The disc flexes when the piston rod moves forwardly under a driving force. The disc unflexes to retract the piston rod and piston head slightly when the driving force stops to create a suction which draws fluid back into the nozzle and thereby prevents dripping. The disc has an integral nipple which frictionally grips the rod to hold it in place, when the driving force ceases. The nipple permits axial rearward movement of the piston rod by an externally applied force for filling the barrel with fluid.

Abstract: A syringe for dispensing a liquid as an atomized spray has a cylindrical barrel, a plunger movable axially in the barrel, a tubular nozzle at one end of the barrel, and a short fixed stem in the nozzle. A cup shaped nozzle tip has internal first spaced lands to frictionally engage the stem and define axially extending passages therebetween. A centrally apertured end wall of the nozzle tip has circumferentially spaced second lands to serve as abutments for the end of the stem. Troughs in the end wall between the second lands define further passages with the end of the stem for turbulently passing the liquid out of the aperture as an atomized spray.

Abstract: This miniature omnidirectional impact switch has a generally cylindrical electrically conductive mass held by coil spring bias in abutment with a conductive header wall at one end of a cylindrical housing. The mass has a blind bore in one end. The mass is held axially tilted by contact between a free end of a wire conductor and an end wall of the bore. A closed circuit is defined between a second conductor contacting the header wall and the first conductor, via the mass and header wall. The switch is responsive to an impact applied to the other end of the housing or to a side thereof within 200 microseconds after impact to open the closed circuit by separating the mass from the header wall and the end of the first conductor against the spring bias. A movement of the mass of 0.001 of an inch is sufficient to open the closed circuit.

Abstract: This matrix system and method for displaying graphic characters has a vertical panel with openings arranged in a rectangular array. At each opening is a display disk rotatable 180.degree. in a path between a non-reflective upright forward facing first position, and a light reflective upright forward facing second position. Each disk is turned on a horizontal axis and can be stopped in horizontal position midway in the path of disk rotation by an electromagnetically extensible and retractable stop member. The disks are turned by interaction between an electromagnetically energized magnetic core, and a permanent magnet rotatable with the disk. Lamps behind the disk can project back light through the openings when the disks are in midway positions to display graphic characters. Retraction of the stop members allows selected disks to turn to an upright light reflective position, to display graphic characters by ambient reflected light, while remaining disks provide a light blocking non-reflective background.

Abstract: This instrument for use in tuning and testing radio frequency circuits, comprises an elongated dielectric rod long enough to be grasped by hand, and having a miniature electronic component at one end secured by an adhesive layer and a length of shrink-wrapped plastic tubing. Two closely spaced stiff leads project from the component for application to closely spaced test points of a radio frequency circuit under test. The component can comprise a miniature test circuit, interconnected miniature electronic parts of any type, a miniature capacitor alone, or a capacitor in circuit with other electronic circuit parts.

Abstract: This microwave transfer device is a hollow body having an internal cavity and lateral input and output openings communicating with the cavity. A post in the cavity divides it into passages extending between input and output openings for passing microwave signals therebetween. Axially reciprocatable shorting pins are supported on the body and are selectively insertable in the passages to close off the passages, and retractable from the passages to open the same. By proper selective insertion and retraction of the pins, microwave signals applied at the input openings can be combined, divided, or switched, respectively, to the output openings.

Abstract: This ice cube maker is an ice cube molding cup or container with closed sides and bottom, and open top closed by a hinged cover on which is a flat, flexible handle. The cover is secured in place by quickly engageable and disengageable catch members. Lateral quick attachment and detachment members permit a multiplicity of cups to be arranged in a planar array. Cups of different sizes and shapes may be laterally attached in the planar array. The cups may have internal partitions defining chambers to make more than one ice cube in each cup.

Abstract: A miniature digital computer circuit capable of operating in substantially instantaneous real time for determining values of combined varying quantities. The circuit has inputs for two variable digital pulse trains. A decoder and shift register compress bit groups to minimize sizes and operating times of associated digital pulse readout memories, multipliers and adders. The circuit adds to combined functions of the varying quantities the sum of significant terms from a differential expansion of the function, to obtain readouts representing changes in the functions.