Abstract: A projection system, such as a slide film or motion picture projection system, includes a light source, a reflector, a film gate or aperture, and a screen. The reflector is formed from a deep-dish ellipse reflector by cutting the ellipse into at least three reflector sectors and then outwardly radially deforming the outer edges, the deformation occurring within a certain critical range. The deformed outer edges are then clamped by circular clamping means.

Abstract: A system for the inspection of the internal nature of a material utilizes an exciting ultrasonic field which is directed at a focal point to be inspected and heats that focal point. An ultrasonic sensing beam is directed through the material and through the heated focal point and is received by a transducer. A differential measurement of a propagation parameter of the sensing beam is accomplished by comparing a burst of its ultrasonic waves through the focal point without the heating effect of the exciting field, with an identical burst of the same duration, amplitude and frequency, but immediately after the heating effect has been accomplished by the exciting field. This system may be used to determine tissue characteristics, internal blood flow, and for other medical diagnostic functions.

Abstract: An impulse heat sealing machine for forming a liquid leakproof seal joining flexible thermoplastic resin films includes a platen which compresses the films under pressure, an etched foil heater carried by the platen and protected by a non-sticking sheet, and timers which determine the timing for the platen to compress the films, impulse heat seal the films, cool the joined films under pressure, and release the platen pressure.

Abstract: A transducer provides simultaneous indications of watts and vars when connected to a power line. For a single phase power line the transducer utilizes an internal power supply and, in addition, one current transformer, one voltage transformer, one modulator and suitable electronic switches, filters and voltage to current amplifiers.

Abstract: A silencer device for an industrial burner is adapted to be positioned over the air intake orifice of the burner tube of the industrial burner and provides two separate air intake paths. One of the air paths is through a central outer port and then between a cylindrical noise suppressing core member, having a perforated conical face on one end backed by a noise absorbent material, and the inner perforated wall of a toroid-shaped member. The other air path is through circumferential openings at the rear end of the silencer device.

Abstract: An apparatus is provided, in which a vegetable is rotated whereas a blade is reciprocated under pressure on the vegetable, to form a tape-like flesh which is used for various kinds of dishes.

Abstract: In a blow molding machine a tubular parison is extruded around a blow pin, a two-part mold is closed and the parison is expanded by air pressure against the internal wall of the mold. Each mold half at its top neck carries a sealing member comprising a first insert, which is a shear insert, in the form of an approximately flat one-half ring to sever the parison against the blow pin; a second insert, which is a seal insert, in the form of a flat approximately one-half ring, to seal the parison against the blow pin; and a base member, in the form of an approximately one-half ring, having an inverted shelf to locate and support the shear and seal inserts.

Abstract: A current-to-current isolator is utilized in a monitoring system between a signal transmitter and a control room instrument. The isolator has a master oscillator, including a first transformer, a slave oscillator, a current transformer and a rectifying circuit, so that the current signal at its input is closely reproduced at its output. The isolator is powered by the signal current from the transmitter and does not require an external power source.

Abstract: An annunciator or similar system includes a plurality of field terminal blocks whose terminals are connected to the field wiring, the field terminal blocks removably fitting within handle terminal blocks. The handle terminal blocks are fixed to module circuit boards which removably fit in an elongated channel member and have along one of their edges a set of contact areas which make contact with terminals fixed on the bottom wall of the channel member. The terminals of the field terminal block are angled relative to the bottom of the block and are parallel to one another.

Abstract: Method and apparatus for transferring formed articles such as confectionery, bread or the like from a feed conveyor through a displaceable transfer conveyor onto a receiving conveyor, trays or boxes without tumbling, deforming or injuring the formed articles, the transfer conveyor being moved substantially downwardly at a velocity greater than the falling speed by gravity of the articles thereon, and then swung substantially laterally at a velocity sufficient to avoid contacts with the falling articles, and finally returned to its original position.

Abstract: The video local oscillator signal is mixed with a signal from a fixed frequency oscillator to produce a difference frequency signal, which is frequency divided and gated to a counter during a predetermined time period in such a manner that the final count of the counter contains the channel number, which is digitally displayed.

Abstract: A teaching machine adapted to take account of the student's ability and progress operates with programmed cards and includes three stacking means, controlled conveyor means, display means and a student input means, such as a keyboard.

Abstract: A frequency band selection switch and variable resistor assembly for one channel of a television tuner in which tuning is performed by varying a tuning voltage. A tuning shaft is connected to the slider of the variable resistor through a harmonic drive reduction gear assembly. A tuning scale is connected to the slider through a bored tuning scale shaft through which the tuning shaft coaxially extends. A bored switch shaft through which both the tuning and tuning scale shafts coaxially extend carries a movable contact of the band selection switch and a frequency band indicator. An assembly support member has a graduated dial associated with both the tuning scale and the frequency band indicator in a unitary manner.

Abstract: A dry cell consists of a metal cylindrical rigid container, an insulative sleeve of synthetic plastic resin, a sleeve of a zinc electrode, a separator sleeve and an internal cake consisting of a depolarizer and an electrolyte. The cake extends upward beyond the edge of the anode and the separator, at its top, contacts the plastic sleeve.

Abstract: A guide roller is traversed substantially in parallel to the axis of an uprightly supported bobbin at a speed slow enough not to form appreciable twilled angles of a wound yarn. The yarn continuously extruded from a spinning apparatus at a speed higher than 2000 m/min is introduced substantially in parallel to the axis of the bobbin and changes its direction to right angles with respect to the axis of the bobbin while travelling through the guide roller. The guide roller traverses with shorter traverse strokes as the diameter of the wound yarn becomes larger.

Abstract: An apparatus for forming and cutting thermoplastic sheets comprises a heater platen and base plate assembly with a toggle leverage assembly which brings the base plate assembly into and out of a closed relation with the heater platen with a sheet of thermoplastic material therebetween. The base plate assembly has a strip of elastic material mounted thereon, one or more mold (forming) sections, cutting blades defining the peripheral outline of the mold sections and a seal-off plate slidably mounted on the base plate assembly and resting on the elastic strips.

Abstract: A machine for the continuous overlay printing (color-on-color decorating) of cylindrical cans provides for the laying down of base coats on the can prior to the ink lay downs as well as a top coat after the inks are set in a sequence of operations which are performed at a plurality of operating stations arranged in a vertically aligned circle. The cans are conveyed to the machine and are held on mandrels which are arranged in a circle on a rotatable vertical index table and the cans are rotated about their individual axes and rotated by the table to the operating stations in discrete indexed steps.

Abstract: An electronic wattmeter (transducer) to measure the average power to a load or on an electric power line includes a current transformer, a voltage transformer and a power transformer, the primary coil of each transformer being connected to the power line. The secondary coil of the current transformer is connected to a modulator so that changes in current vary the duty cycle, i.e., zero crossings, of a duty cycle modulator-oscillator. The modulator and the secondary of the voltage transformer are connected to an electronic switch whose switchings are controlled by the zero crossings of the oscllator's pulses whose output is a pulse train in which the pulses vary in width dependent upon current and vary in amplitude dependent upon voltage. The switch is connected to a filter whose output is a d.c. voltage which is proportional to the average electric power on the line.

Abstract: An isolated two-wire transmitter includes a regulated d.c. power supply having an astable multivibrator which generates isolated power supplies and input terminals which are connected to a first operational amplifier to thereby control a transistor in order to produce a current proportional to the input voltage. That proportional current controls the output of a current transformer, which chops that current at a rate determined by the multivibrator. The a.c. current from the current transformer is rectified and controls a second operational amplifier and a Darlington circuit to thereby produce an isolated current proportional to the input voltage.

Abstract: Multiple images of a common scene are formed by exposure of photographic film primarily to separated zones of the actinic electromagnetic spectrum. The several film images are illuminated individually with lights of selected chromaticities. The chromaticity of the light illuminating at least one of the images is widely separated from the chromaticity associated with the corresponding exposing spectral zone for that image. The illuminated images are displayed in registration for evaluation.