Abstract: A coupling arrangement for mounting a drill jig in selected position on a Hardinge-type fixture. An arm carries a drill bushing, through which the drill passes into a workpiece held by a Hardinge fixture. Adjustment of the arm relative to the fixture is provided by the use of gauging blocks which enable the arm to be preset. The coupling arrangement assures proper movement and location of the bushing relative to the fixture.

Abstract: An open loop control device and method are provided for stepping motors. By energizing a motor so that the rotor motion is the result of a revolving field which is of piecewise constant speed and uniform field strength, the rotor can be brought to a stop at any desired position. Such position can be the same as or different from the conventional full-increment or half-increment detent positions of the motor. This control method and device guarantee that there is no oscillation when the rotor reaches its final position. The field windings are energized in sequential manner and such that the resultant field takes into account the magnetic characteristics of the motor. The revolving field can be initially adapted to produce, in one case, an angular velocity of half the desired speed for purposes of accelerating the rotor. After one-half of a resonant period has elapsed, the rotor is accelerated to the desired speed. At this time, the speed of the field is doubled and the rotor fully synchronized therewith.

Abstract: A DC current level detector is provided for monitoring the heater current of a pitot tube. The detector includes a toroidal core defining a bore through which can be passed a line carrying the current to be detected whereby an amount of flux is generated in the core according to the current to be detected. A reference circuit is provided to generate in the core a reference amount of flux against which the first flux is compared in an algebraic combination. An oscillator circuit is inductively coupled to the core to saturate the core in opposite directions. The algebraic difference between the fluxes is employed to generate a signal to operate a relay. The relay is included in a circuit in which are connected a power source and an indicator such as an alarm lamp. The core is of toroidal shape and a casing is provided which houses the core along with the associated circuits and which is provided with an opening corresponding with the bore of the core.

Abstract: A double acting Diesel cycle hot gas engine comprising a plurality of engine cylinders, each having a free piston unit adapted to perform work, providing a continuous flow of compressed air to an energy consumption source and to a storage tank connected therewith. The free piston unit includes an air compression piston and a power piston, spaced apart from each other and adapted to move together within each respective engine cylinder through a connecting rod extended therebetween in response to the movement of a working medium under a substantially constant pressure acting against one side of the power piston and to the pressure and expansive power generated by the burning gases of an air fuel mixture acting on the opposite side of said power piston. Cycle control means are provided to release the potential energy accumulated within the working medium which is initially used to drive the power piston to compress the air fuel mixture and thus, initiating the operative cycle of the engine.

Abstract: An improvement in micro-calipers including a main beam, a mount slidably mounted on the main beam, a dial gage carried by the mount, a rack bar mounted on the main beam which has a toothed marginal portion, a pinion mounted on the dial gage which engages with the rack bar, a disc mounted on the gage which has a plurality of electrically conducting and concentrically disposed projections, an electrically conducting pointer coupled to the pinion and rotatable over the projections, a first lead in sliding electrical contact with the pointer, and a second lead in electrical contact with the projections. The leads are attached to first and second contacts of a calculator result-key or the like, so that a predetermined longitudinal displacement of the mount with respect to the main beam from a first position to a second position results in a predetermined number of interruptions in conductivity between the leads.

Abstract: An automatic counter which can scan either micro or macro sized objects in a field and provide both a visual display of the scanned objects as well as a digital count or measurement of the objects. A video camera is focused onto the sample and produces a video output signal which is processed and ultimately displayed on a video display together with an appropriate flag signal on each object identified. An aperture generator generates an electronic aperture signal whereby a particular area can be selected as to both size and shape and the selected area is displayed on the monitor screen of the video display. A compensation circuit provides additional counts to compensate for those cases where the entire area of a sample is not counted. An absolute area circuit provides a silhouette around each identified object and can provide an absolute measurement of the area within the silhouettes as well as a measurement of the total area of the selected aperture.

Abstract: A greenhouse is provided with a humidifying apparatus which is located at the top of the greenhouse and includes elements for controllably humidifying the greenhouse and to circulate air therein while displacing heat downwardly from the top section of the greenhouse. The humidifying apparatus includes a misting valve connected in series with a solenoid valve, there being further provided a control which actuates the solenoid valve selectively dependent upon the percentage of humidity in the greenhouse. A pair of fans are provided on opposite sides of the misting valve, these fans facing downwardly to propel air downwardly in the greenhouse both for the purpose of air circulation and for the purpose of cycling heat downwardly since it tends to collect in the top of the greenhouse.

Abstract: A steel heating boiler for liquid or gaseous fuels, with a water-bearing housing, between the front and rear walls of which is arranged in a liquid-tight manner a cylindrical installation unit consisting of combustion chamber and fuel-gas flues. The steel heating boiler which is intended for the operation of hot-water heating systems is distinguished by the fact that the installation unit, whose combustion chamber and fuel-gas flues are provided with a corrosion-resistant lining known per se, has on the inside end closure members included in the lining, whose outside diameter is larger than the outside diameter of the installation unit, the outer peripheral edges of the end closure members being connected to the opening edges of the front and rear walls in a liquid-tight way and at least the inside diameter of the burner-side end closure member being made smaller than the inside diameter of the installation unit.

Abstract: For reconstituting a seat back formed of a metal frame and a back member, there is provided a cover which includes inner and outer cover members laminated together. The inner member is formed of foam or sponge and is one-sided with pockets in the upper corners thereof to be draped over the frame. The inner member is covered by a vinyl outer cover member which has recesses cut therein to faciliate closing the same around the frame.

Abstract: A label is provided for a bottle in the form of a heat shrinkable sleeve made of oriented polyethylene. The label is made as a laminate having inner and outer layers. The outer layer has a coefficient of friction of less than about 0.15. The inner layer has a coefficient of friction of greater than about 0.4. The inner layer includes ethylene vinyl acetate. The layers are about 0.001 inches. The layers are connected by an adhesive, which is about 0.00005 inches thick. A plurality of sleeves can be formed from a planar strip wherein first halves of the sleeves are formed adjacent each other along half of the strip and complementary halves of the sleeves are formed adjacent each other along the other half of the strip, whereafter the strip is folded in half to bring the first halves into alignment with the complementary halves and the thusly constituted portions of the sleeves are heat sealed or welded together.

Abstract: The use of a mini-aggregate iron ore concentrate uniformly dispersed in an inorganic cement matrix produces a structural product superior in many respects to ordinary concrete. Structural improvement is achieved, especially with respect to higher compressive and tensile strengths, and a significant increase in bond strength to steel reinforcement members is attained. Substantially the same strength can be obtained at all slumps.

Abstract: A mortar or cement composition is provided which is adapted for being mixed with water and thereafter set. The composition comprises cement mixed with iron oxide in a ratio of about 1:4. At least one admixture is added from a group consisting of functional water-reducer admixtures, thickener admixtures and defoamer admixtures. The functional water reducer admixture is used to increase the density of the mortar or cement without substantially retarding the setting thereof and without entraining substantial amounts of air. The defoamer admixture is added to reduce air content of the mortar or concrete and to increase the density thereof. The thickener is adapted to inhibit bleeding of water from the mortar or cement. The method of the invention involves making a mortar or cement composition which comprises adding to cement and iron oxide at least one admixture selected from the group consisting of functional water-reducer, thickener, and defoamer admixtures.

Abstract: A multi-part assembly of a honing disc base and a blade carrying cover to permit rotational contact of blade edges and honing surface for correct angle sharpening of the blade cutting edge of rotary type shavers.

Abstract: A method and apparatus for automatically identifying paper currency, stocks, stamps, and the like, by optically examining and viewing regions on the currency. The graphic pattern scanned is stored as signal information and then compared with signals representing predetermined standard information on the pattern of the currency. An identification is obtained upon the concurrence of a predetermined amount of the two information signals being compared. The system can accommodate lateral shifts of the currency and skew angles of arrival of the currency, and still provides a suitable identification. In the case of lateral shifts, it can either compensate for the shift or provide comparisons with a plurality of standard information signs, each for a different lateral displacement.

Abstract: Processes are disclosed for forming containers having the complete outer surfaces decorated and the bottom surface reinforced as well. In one embodiment a banderole is placed in a deep-drawing mold and length of drawable foil having a bottom blank secured thereto is fed to the mold. In a second embodiment the bottom blank is placed in the mold, together with the banderole prior to the feeding of the drawable foil. Pleating of the peripheral edge of the bottom blank prevents covering of the suction openings in the deep-drawing mold.

Abstract: For convenience in handling, etc., use is made of a concrete or similarly fabricated member which, although actually a single rectangular block-like member, has a surface line impression effectively simulating a selected arrangement of plural individual pavers or bricks, thereby giving the desirable impression that the construction is formed by said individual bricks, rather than by the fewer number of construction blocks. In accordance with the present invention, the line-forming means, which simulates the individual bricks, is retracted from its position impressed into the concrete mass or mixture through slots in a press-plate having wiping surfaces which removes any adhering concrete therefrom, and thus the shaping contour of said line-forming means is properly preserved for succeeding brick-simulating service. The term "brick" as used herein is intended to broadly encompass regular as well as irregular shapes, such as stones.

Abstract: A high frequency push-pull amplifier which includes an improved output circuit to eliminate spurious emissions, typically low frequency parametric oscillations. The output circuit includes a low pass filter with an inductive input so as to avoid a series resonance to any harmonic of the desired output signal of the amplifier. A resistive termination is provided to any of the in phase signal components between the push-pull amplifier and the low pass filter. Also, to inhibit any tendency towards parametric oscillations, the variation in output capacitance with respect to collector voltage of the transistors is minimized by placing a capacitor in parallel with the collector capacitance, which is several times the collector to emitter capacitance of the transistors at their normal collector voltage.