Abstract: A method for coupling radiation in an infrared detector of the kind which uses quantum wells that are comprised of thin layers of, e.g., gallium arsenide (GaAs) surrounded by aluminum gallium arsenide (AlGaAs). The invention is characterized in that a two-dimensional crossed grating (6), a so-called 2-D grating, is constructed on the top of the detector mesa of the detector on the side opposite the surface through which incident light (5) enters the detector. The grating (6) is caused to spread the incident light in different directions. According to one preferred embodiment, the detector also includes a cladding layer (14) which, together with the crossed grating, forms a wave guide.

Abstract: A holder for holding a plurality of position sensors, such as ultrasonic position sensors, in a ganged array for pivotal movement about a vertical pivot axis passing through the holder. The holder includes a pair of housings carried on a rotatable shaft, each housing carrying six sensors in two groups of three. Each group is angularly offset from the other group. The sensors within a group are angularly offset from each other by angles that are multiples of the beam angle of the sensor beams.

Abstract: An axially compact rotational sensor adaptable to a drive axle for determining the rotational speed of the differential case which is the average speed of the wheels associated therewith. In a second embodiment dual rotational sensors are incorporated in the drive axle for determining the rotational speed of the differential and one axle shaft permitting calculation of the speed of both axle shafts.

Abstract: A chocolate coating for frozen desserts or the like containing no tropical oils but including a mixture of first and second oils having a different degree of hydrogenation and different melting temperatures and other compatible ingredients.

Abstract: A fluorescing coating which fluoresces when illuminated with light within the ultraviolet wavelength range. The coating is intended primarily for road markings of different kinds and includes material (4;5) with pigment for emitting color when illuminated with light within the visible wavelength range and material which fluoresces when illuminated with light within the ultraviolet wavelength range. The coating further includes a binder (3). The invention is characterized in that the material which fluoresces when illuminated with light within the ultraviolet wavelength range consists of glass spheres (2) or glass pieces produced from a glass mass which has been doped with a dope additive such as to cause the glass in the glass spheres or glass pieces to fluoresce when illuminated with ultraviolet light.

Abstract: A treatment apparatus including a probe to be inserted into openings and cavities of the body, a control apparatus having a battery which is chargeable by the public power network. A control current circuit includes an intermittent current impulse circuit which causes the heating unit of the probe to emit heat in form of intermittent heat impulses of adjustable magnitude. The apparatus finds application in the therapeutic treatment of diseases in the walls (tissue) of cavities of the body such as, e.g., hemorrhoides, and prostate conditions.

Abstract: A door that includes one or more electrical devices, such as an outlet receptacle, an illuminated house number sign, or an illuminated display panel. The electrical devices are powered from an external source of power that is conducted through a pair of pivotable conductors extending between the door and the adjacent door frame. One end of the pivotable conductors is electrically connected with a source of electrical power, and the other end of the respective pivotable conductors is electrically connected with the electrical devices carried by the door, to avoid external extension cords and to avoid the need to conduct electricity through the door hinges.

Abstract: An expanding gate valve having replaceable valve seats that are capable of longer operating life than conventional valve seats. The valve seats of the present invention have sealing faces that are case hardened to a hardness of about Rockwell 60 C and are devoid of resilient sealing rings in the sealing faces. Additionally, the seats are of floating construction, and are adapted to move both axially and to tilt relative to the seat recesses that are provided in the valve body. Finally, a resilient biasing arrangement is provided at the rear portion of the seat to bias it outwardly relative to the seat recesses to insure substantially complete surface engagement between the sealing face of the seat ring and the face of the respective gate surface.

Abstract: An extrusion blow molding machine including an extruder and an extrusion die head, the extruder and extrusion die head carried on a carriage member. The carriage member is movable linearly along an extruder support frame of generally rectangular configuration, the extruder support frame extending laterally outwardly beyond a supporting mold clamp support frame that is adapted to support a movable blow mold. The carriage is shiftable in a horizontal direction so that the extrusion head can be selectively positioned above the blow mold when in an operating position, and can be shifted laterally outwardly in one direction to be positioned beyond the mold clamp support frame when in an inoperative position, to provide convenient access to the extrusion head from below for purposes of maintenance, cleaning, and the like.

Abstract: An improved pivot pin which allows individual pin connection of each hammer in the rotor of a shredder is disclosed. The pivot pin includes male and female pin members which interengage in a tight fit so as to function as a single pin when fitted together. A bore extends through both of the male and female pin members, with the bore through the female pin member being threaded. A securing device such as a socket head capscrew passes through the male pin member from the outer to the inner end portion thereof and is threadedly received in the female pin member.

Abstract: A medical catheter, for example, for drainage of a bodily fluid such as urine, includes a biodegradable portion which place in a body cavity, and thereby resists infection or the formation of encrustation or blockages normally associated with indwelling catheters.

Abstract: An expansion hose for power steering plants of motor vehicles. The hose includes an outer pressure hose (2) connected to an inlet side end member (1) and to an outlet side end member (3). An inner flexible hollow body (5) is arranged coaxially with pressure hose 2, and which at the inlet side is connected to a nipple plug (4) of the inlet side end member (1) and at the outlet side extends freely into the outlet side end member (3) in its outlet channel (6) with a radial clearance. The nipple plug (4) includes in addition to the axial passage (9) located at the center axial passages (10) at a radial distance outwardly therefrom and distributed circumferentially, and which lead into the annular space (8) between the outer pressure hose (2) and the inner flexible hollow body (5).

Abstract: Trimming apparatus for trimming the top flash, neck flash, handle opening flash, and bottom flash from a blow molded plastic bottle. The handle opening flash is removed by a punch and anvil to act against the handle opening flash and push it laterally away from the handle for separation from the bottle. The top and neck flash, and the bottom flash, are each removed by respective gripper devices that grip respective portions of the flash and pull the flash linearly away from the bottle to effect separation of the flash from the bottle. The handle opening flash removing device remains in position within the handle opening to thereby serve to hold the bottle against vertical upward movement as the top and bottom flash are being removed. Upper and lower grippers having a pair of gripper jaws are provided to pull the flash in an axial direction from the top and bottom of a bottle, and to avoid the need for precise positioning of the bottle relative to a flash cutter.

Abstract: A rotary internal combustion engine including a plurality of toroidal cylinders and toroidal pistons that are slidably carried within the cylinders. Combustion of an air-fuel mixture within the respective cylinders provides a series of circumferential power strokes for more efficient operation. The pistons and cylinders are carried by a pair of side-by-side, coaxial drive rotors, the output power pulses of which are transmitted through a drive clutch and planetary gear assembly to an engine output drive shaft. The drive clutch and planetary gear assembly includes four overrunning clutches and a planetary gear train to smoothly transmit the successive intermittent engine power strokes to the output drive shaft.

Abstract: Extruder barrel temperature control apparatus in the form of a plurality of axially spaced tubular shells positioned in end-to-end relationship on the outer surface of a tubular extruder barrel. Each of the shells includes individual resistance heater elements embedded in the shell wall for providing heat to maintain a desired shell temperature. Each shell includes two groups of outwardly extending cooling fins, each group axially spaced from the other, and each group of fins has an associated air blower positioned below the fins and supported by an outer casing surrounding the extruder barrel. The outer casing includes an internal shroud to confine the cooling air flow so it is directed over and along the cooling fins. The heating elements and the blower motors are connected with a suitable control system for providing and maintaining a desired temperature level at the barrel inner surface. Six such shells defining six respective heating and cooling zones are disclosed.

Abstract: An injection molding machine clamping system in which a stepped bar is provided between the movable and stationary platens, and blocking apparatus is carried by one of the platens to block movement of the stepped bar upon the happening of certain conditions. The stepped bar is slidably carried in a bushing in the other mold platen, the bushing preferably being made from an ultra-high molecular weight polyethylene material to reduce wear, to eliminate the need for lubricants, and also to reduce the intermittent clicking noise that results when the notched bar is moved axially through a bore.

Abstract: A transistor in which the emitter terminal is coupled to ground through a filter capacitor. The filter capacitor has a capacitance of from about 0.2 .mu.f to about 22 .mu.f and can be connected either by itself or in parallel with a resistor, depending upon the circuit in which it is used. The incorporation of a filter capacitor of such a capacitance level provides greatly improved gain and less distortion of the input signal, to permit a high output to be achieved in fewer amplifier stages and with less current draw and heating than in conventional transistor amplifier stage circuits. Additionally, the transistor can be provided in a unitary structure by incorporating the filter capacitor directly on the transistor chip, and can also be provided by incorporating the transistor and a resistor within the casing of a filter capacitor.

Abstract: A novel mobility enhancement device such as a crutch instructed in one piece from tubular metal, such as titanium, suitably bent to form a forearm and hand support assembly by which the weight of the user is applied directly down onto a vertical shaft. A pair of these novel crutches formed in right hand and left hand fashion enable a person with severely limited use of both legs to be independently mobile and confident of the strength and stability of the crutches.