Abstract: A tickler file containing index cards arranged by date and containing data slips filed under the index cards in accordance with the date on the index cards. In order to permit ready access to the data slips in the tickler file by subject matter, rather than by date, the data slips are wider than the index cards and data slips and index cards are stored in a wide sidewise slanted file tray, so that all rest on the bottom and settle against the lower side wall of the file tray. Indicia relating to subject matter is applied to the edge of the data slips which project beyond the index cards. Said indicia can readily be scanned for particular subject matter by riffling the projecting side edges of the data slips.

Abstract: The application discloses an explosive-cartridge powered hammer or impact tool, which is especially adapted for use in foundries for trimming or finishing castings by knocking off runners, feeder heads and flash, but which can also be used for other operations, such as riveting. The hammer is provided with means to soften recoil.

Abstract: The subject of the invention is an alloy of magnetostrictive and piezomagnetic properties suitable for the production of cores of ultrasonic transducers. The alloy according to the invention contains, besides iron, 5 to 15% Al, 0.5 to 10% Co and up to 3% of other additives.

Abstract: A door for opening and closing the discharge opening of a hopper is carried y a support suspended from an oblique lateral wall of the hopper by two links pivoted to the support at one end and pivoted to the support at the other end of the links. An actuating and locking mechanism for the door is connected to the support. The support has a generally triangular shape and the two pivotal connections between the links and the support are in the vicinity of two of the corners of the triangle. The door is located in the vicinity of the third corner of the triangle.

Abstract: Disclosed herein is an improved electronic control system for the autoclaving sequence of a kidney dialysis machine, during which water is circulated at high temperature and pressure to clean and sterilize the machine. The circuit ensures that the machine will be autoclaved for a minimum period of time, such as 20 minutes, measured only while the temperature is above a minimum, such as 120.degree. centigrade. The circuit will remember the time of autoclaving previous to a power interruption, and will continue to time the autoclaving function only when the temperature has again exceeded the set minimum. Once an autoclaving sequence is initiated, the circuit prevents normal use of the machine until the sequence is completed. During the autoclave timing sequence, the kidney by-pass solenoid is energized and de-energized on a 50% duty cycle to make sure all flow paths in the machine are cleaned and sterilized.

Abstract: The noisy amplified signal from a photoelectric device is passed through an electronic low-pass filter before having its direct current component read on a meter. The cut-off frequency of the low-pass filter is adjusted in known manner by rotation of a control knob, so as to suitably match the cut-off frequency to the noisiness of the signal with a view towards speeding up the stabilization of the meter reading. To overcome the sluggishness of the system, the same control knob is briefly pushed, thereby overriding the low pass control. The method of using the system to speed up meter reading is described.

Abstract: The invention relates to a voltage regulator for alternating current using a saturable core inductor as a control element for the voltage at the output of the regulator. Each half wave of the output voltage of the regulator is compared with a reference voltage by way of an unfiltered full wave rectifier. An unbalanced bridge having a temperature variable resistor such as an incandescent lamp, in one arm thereof is positioned to receive the pulses produced by the rectifier. At the instant that the pulse wave at the output of the bridge exceeds the reference voltage, the current through the control winding of the saturable core reactor is suddenly blocked. The blockage continues until the pulse becomes less than the reference voltage. This blockage so reacts on an auto-transformer in series with the supplied alternating current as to cause the output alternating current voltage to be reduced. The blockage or interruption causes the change in alternating current voltage to take place very quickly.

Abstract: Two gases are fed to a mixing valve having two outlets, and the proportions of the two gases, at each of the said outlets, is varied inversely in accordance with the position of a moveable portion of the mixing valve. If the back pressure at the two outlets is equal, and if the supply pressure of the two gases is equal, the proportioning of the two gases will be accurately determined by the adjustment of the valve. Thus, in an automatically controlled system requiring the presence of gases in time-variable proportions, proper proportioning can be achieved by the use of a mechanical valve, without the necessity of a gas testing analyzer and a feedback system for controlling an ordinary mixture proportioning valve.

Abstract: There is disclosed herein a method for blow molding a bottle, for instance, from a tube of thermoplastic material. The method includes filling such a container, if desired, with a fluid prior to sealing of the bottle. The bottle has at least one orifice which may be sealed with an integral membrane and a further protective cap is integrally molded with the bottle. Apparatus is also disclosed for molding, filling and sealing such bottles in one operation from a tube a thermoplastic material which has relatively movable mold parts.

Abstract: An improved nephelometer for immunochemical complex assay measures forward light scatter in samples. The angle of forward scatter, about 30.degree., is small enough to result in a large amount of forward scatter from the immunochemical complex particles which are to be assayed, whose size is of the order of the wave length of the light used in the optical system. Forward scattering from smaller particles, such as from molecules of buffer, antibody and serum, is constant during the course of a test, and is compensated for by the use of subtraction circuits which are readily and semiautomatically adjusted to subtract proper values, in accordance with the readings taken on standard or "blank" samples of buffer, antibody and serum. Forward scattering from large particles, such as dust, is variable, and results in fluctuating signals, which are electrically processed to ignore the spurious peaks. The results of a test are displayed on a digital read out meter.