Abstract: A temperature sensor for an engine such as an automotive engine, which sensor comprises in combination an electric heat sensitive device such as preferably a thermistor, a contact board and a housing. One of the surfaces of the magnet magnetically attaches the sensor to the engine. The magnet has an aperture for housing the heat sensitive device which is retained within the aperture by a heat-conductive material. The contact board connects the leads of the heat sensitive device with leads of a cable which may be connected to an indicating device. The housing of the sensor, made of an electrically insulating material, partially encloses the magnet, thereby leaving open a surface for magnetic attachment to a ferromagnetic part of the engine, the temperature of which is to be determined.

Abstract: A process for the separation and isolation of AHF, fibronectin and von Willebrand's ristocetin cofactor from blood plasma by adding a sulfated mucopolysaccharide to blood plasma to a concentration of from about 0.05 to about 0.4 mg/ml of plasma, cooling the plasma to 0.degree. C.-15.degree. C., centrifuging the plasma to isolate a precipitate which forms and then removing the AHF-rich supernatant liquid from the precipitate.The precipitate is washed in a slightly basic solution of dilute salts and then dissolved in a buffered solution of chaotrophic salts of the Hofmeister series having an ionic strength from 0.01-1. Fibronectin is separated by chromotographic means from the dissolved precipitate which contains fibronectin and fibrinogen.The dissolved precipitate may also be applied to a glass or plastic column containing a 4% agarose gel (E. G. Sepharose 4B or Biogel A-15m) in a 0.25 molar solution sodium phosphate titrated to pH 7.0 with any base, preferably TRIS.

Abstract: A leg stretching exercising device comprises a platform having an upwardly extending backrest at one end thereof, at least one handle opposite the backrest and extending outwardly from the platform. A bar including telescoping inner and outer end portions extends outwardly from the platform at each end substantially in alignment with the backrest and perpendicular to the handle. The telescoping members are longitudinally adjustable and include means for fixing the length of said members. A pulley member is connected to the end of each inner telescoping member and includes a rope-like member having a stirrup at one end for locking one's foot and a handle at the other end. In operation, an individual adjusts the telescoping members to the proper length and sits on the platform against the backrest gripping the pulley handles which are pulled together stretching one's legs which are placed in the stirrups. The handle is gripped if an individual is stretching only one leg with the pulley.

Abstract: A temperature sensor for measuring the temperature of a part of an automobile, which sensor comprises in combination a clip and an electric heat-sensitive device, such as preferably a thermistor. The clip, which attaches the sensor to the automobile part, includes a first and a second jaw. These jaws are movable between a first and a second position. In the first position, the jaws are remote from each other, whereas in the second position they are positioned close to each other. In the first jaw, there is provided a recess adjacent to the second jaw. A heat-sensitive device is retained within this recess by a heat-conductive material. The automobile part, the temperature of which is to be determined, is enclosed between the jaws when the clip is in its second position.

Abstract: A vacuum evaporator/sublimator flask apparatus comprises an elastomer cap and a cylindrical glass body. The glass body is a straight-sided cylinder, preferably made of borosilicate glass tubing of sufficient wall thickness to prevent implosion when subject to high vacuum, open at one end and sealed at the other. The elastomer cap is preferably fabricated of clear elastomer in a one-piece molded arrangement which includes an upper neck portion, an outwardly extending sloping intermediate portion terminating in outer downwardly extending walls having an inwardly extending flange at the end thereof to engage the glass body. The neck portion has a tubular opening and a molded-in-place insert at the base of the neck to serve as a stop for rigid tubing that is inserted to permit connection to a vacuum system. The upper portion of the neck includes an inwardly extending portion which engages a vacuum insert.

Abstract: An electrical terminal board comprises a plurality of modules having contacts which clamp the individual modules to adjacent modules as well as position them with respect to one another. The modules are secured together preferably by a dovetail arrangement wherein a dovetail slot on each side of the contacts mates with a corresponding protrusion on the individual molded plastic modules. Each module comprises a base having a wall extending upwardly from one surface thereof at substantially the mid-point of the base with the wall having dovetail protrusions extending outwardly on each side thereof at an intermediate point. The contacts may include a variety of configurations such as a tubular or flat structure having a mating dovetail protrusion on the module wall securing the adjacent modules together. The module spacing may be varied merely by employing contacts of different widths.

Abstract: A dowel post for securing dental and medical prostheses is provided having improved retention when cemented in a parallel-sided blind hole, and which reduces build-up of hydrostatic pressure ahead of the post as it is inserted. The dowel post comprises a head on which said prosthesis is formed or mounted and a shaft extending downwardly therefrom having a channel formed therealong providing a flow path for the cement. The channel is formed by one or more and preferably four or five helical concave flutes wound about the axis of the post at a pitch angle to the axis of 70.degree. or less and preferably at about 45.degree..

Abstract: An X-ray generator has at least a first and a second cathode filament for emitting electrons, one end of the first filament being connected to one end of the second filament, the connection point forming a terminal. Still two further terminals are located at the ends of the serial connection of the two filaments. Two of the three terminals are connected via a diode in each connection line to the first pole of a d-c source, while the third terminal is coupled to the second pole of the d-c source. Both diodes are oppositely poled. The polarity of the d-c voltage supplied by the d-c source can be changed, for example, by a remote reversing switch. The polarity of the d-c source determines which and how many filaments are energized to provide focal spots of different size. Since two supply lines are sufficient in a high-voltage cable for feeding the first and second filaments, a third line in the cable can be used for the supply of a third heating filament.

Abstract: The radiation emitting apparatus contains a radiation source which projects a beam of radiation along a central axis onto a surface to be irradiated. There are provided a first and a second light-beam localizer for emitting a first and a second plane light fan, respectively, towards the surface to be irradiated. The second light fan intersects the first light fan in an intersecting line which coincides with the central axis of the emitted radiation. A scale may be projected towards the surface along with one of the light fans. In a preferred embodiment the radiation source is an electron accelerator and the surface is the skin of a patient to be treated.

Abstract: A machine with a central strut, which strut has a center portion first and second end portion, two pairs of flexible bows, each pair comprised of two bows under flexed stress and having first and second ends. The bows are flexed in an arc such that said first and second ends of the bows extend at 90.degree. angles to each other. The first end of each the bows in a pair are fastened to each other in overlapping longitudinal relationship to form a handle for said machine, and the second end of each of said bows are rotatably secured to an end portion of the strut in a manner to prevent lateral or longitudinal movement.The machine converts forces applied in a direction perpendicularly to a plane to a force acting perpendicularly to the same plane but in a direction opposite that of the first force applied. The first force may be applied in the first direction of a single point, or a pair of points, in equal or differing magnitudes.

Abstract: A system for detecting railroad cars in a moving train. The cars are assumed to be of the type having two wheel trucks, each with at least two axles arranged adjacent to each other such that the maximum distance between the axles of a single truck is less than the center distance between facing axles of two trucks of a single car. The system includes a device for measuring the distance between successive axles as a train of cars moves in one direction along a track, a device for comparing each measured distance with the maximum axle distance for a truck, and a device for determining whether the axle spacing of a first truck equals the axle spacing of a second truck after the maximum axle distance for a truck has been exceeded. In this way, an individual car is detected upon identification of two identical truck assemblies which are separated by an axle spacing that is greater than the maximum permissible axle distance in a truck.

Abstract: There is disclosed a head loading carriage assembly for a data storage device such as a "floppy" disk device, the carriage assembly including a base and being movable in a radial direction relative to the recording medium. Pivoted with respect to this base are two arms: a head support arm carrying at least one magnetic head and an auxiliary load arm which is movable in respect to the head support arm between a first and a second load position. The magnetic head is in contact with the recording medium in both of these load positions; however, it is operative only in the first load position. A first spring urges the auxiliary load arm into the first load position towards the head support arm, so as to engage the magnetic head attached to this arm with the recording medium. A second spring, forming a residual leaf spring, is arranged between the head support arm and the auxiliary load arm.

Abstract: In magnetic recording devices, such as floppy disk drives, operational difficulties in the faithful reproduction of recorded data include peak shifting. The invention overcomes these difficulties by introducing a read back compensation circuit comprising a frequency equalizer which favorably amplifies a certain harmonic of the original read signal. In a recording device using a modified frequency modulation encoding scheme (MFM), for instance, this harmonic would be the second harmonic. In order to minimize the effect of circuit paramater variations the frequency equalizer may be split between two circuits, specifically between the read filter network and the read differentiating network. First switching means connected to the filter network and second switching means connected to the differentiating network are arranged as to change the damping factor and the frequency of the filter and differentiating network.

Abstract: A firearm training device comprises a combat target mounted at one end of a frame, an adjustabe inclined slide and a slingshot mechanism mounted within the frame. When the device is activated, a heavy ball is rolled down the slide. If the user hits the target with wax bullets before the ball reaches the end of the slide, it releases a trigger mechanism which blocks the further progress of the ball down the slide. If the ball reaches the bottom of the slide, prior to the bullet striking the target, the ball activates a trigger mechanism which releases the slingshot mechanism propelling a projectile such as a rubber ball at the trainee with sufficient force to effectively punish him. The device thus gives added impetus to the trainee's efforts to fire quickly and accurately.

Abstract: A process for the separation and isolation of AHF and fibronectin from blood plasma by adding a sulfated mucopolysaccharide to blood plasma to a concentration of 0.15-0.25 mg/ml of plasma, cooling the plasma to 0.degree. C.-15.degree. C. centrifuging the plasma to isolate a precipitate which forms and then removing the AHF-rich supernatant liquid from the precipitate.The precipitate is washed in a slightly basic solution of dilute salts and then dissolved in a buffered solution of chaotrophic salts of the Hofmeister series having an ionic strength from 0.01-1. Fibronectin is then separated, by chromotographic means, from the dissolved precipitate, which contains fibronectin and fibrinogen.In a preferred embodiment, 0.20 mg of sodium heparin per milliliter of human plasma is employed with the heparinized plasma solution cooled for 3 hours at a temperature of 2.degree. C.-4.degree. C.

Abstract: A thin, flexible covering material which provides a heat and vapor barrier for walls or ceilings comprises a first layer of vinyl or cloth on which a decorative design may be printed, a second layer of paper or cloth, a third layer of metal foil, and a fourth layer of paper or cloth, the layers being laminated together to form the covering material. Alternative embodiments include applications as floor coverings, rug underlays, wall sections, or window blinds. Optional layers of polymeric foam or wall board may be incorporated into the covering material for some applications.

Abstract: Two sail structures are disclosed for use in propelling a movable body, such as a ski, skate, iceboat or the like, over a solid surface. One sail structure uses the lateen configuration and includes a triangular shaped sail with an upper spar and lower boom for holding the sail in an open, triangular form; as well as a mast, connectable to the spar and boom, for supporting the sail in a lateen configuration. The other sail structure includes a vertical mast and a horizontal boom connected in a "cross. " A first right-triangular sail is connected at its three corners to the forward end of the boom, the top of the mast and the coupling point of the mast and boom. A second right-triangular sail has its edges connected along the mast and boom, between the coupling point and the top of the mast and between the coupling point and the rearwad end of the boom.

Abstract: A porosimeter comprises a tube of non-magnetic material connected at one end to a sample chamber capable, like the tube, of withstanding high internal pressures, means to exhaust the sample chamber and tube, means to fill the chamber and tube with mercury, means to deliver to the tube under adjustable pressure a fluid of density different from that of mercury, a float of magnetic material and of intermediate density disposed in the tube, and a differential transformer in which the float acts as a core to indicate the position of the float.

Abstract: The rotational speed and torque mechanical transducer comprises an outer rotor connected to the motor through a power input shaft; a transverse shaft rotatably mounted at the interior of the outer rotor, and presenting an inner rotor secured thereon; a second shaft rotatably mounted in the inner rotor at right angles with respect to the axis of said inner rotor, and carrying secured thereon a central rotor; an intermediate rotor rotatably mounted around the axis of the inner rotor, and connected through a gear transmission with the shaft of the central rotor, and through another gear transmission with a main output shaft, while the shaft of the inner rotor is connected through a gear transmission with an auxiliary output shaft.

Abstract: A solar collector system comprises one or more slate absorber panels each including a series of heat collecting slate members arranged in a shingle-like closed assembly over which water is designed to flow for heating by solar energy. The system includes a trickle pipe mounted at one end of the sloped assembly so that water flows therefrom onto a copper plate having a baffle at one end and then onto the first of a series of slate members where the water is heated by the sun and finally flows into a collecting trough at the other end which also includes an outlet for the water. The assembly including the slate members is mounted within an aluminum jacket having a base and upwardly extending side portions to the ends of which closure members are mounted. Copper side channels of a particular configuration are mounted along both sides of each panel in a manner to provide improved sealing, particularly where a number of panels are to be ganged together.