Abstract: A locking and release mechanism for use in connection with retractable drop lights is disclosed including a spring loaded reel mounted for rotational movement so that a conductor for the drop light can be reeled and unreeled therefrom. The mechanism includes a ratchet rotatable with the reel, a pawl pivotably mounted adjacent to the ratchet so that the pawl can be rotated between positions engaging the ratchet and disengaging the ratchet, thus permitting the spring loaded reel to rewind the conductor, a solenoid for pivoting the pawl between those two positions, and a switch located in proximity to the drop light itself for connection to the solenoid through the conductor so that the solenoid can be selectively activated from that switch location.

Abstract: A coupling assembly for centrifuges is described comprising a rotatable part and a fixed part, a plurality of tubular conduits provided in the fixed part and a corresponding multiplicity of feed and/or discharge passages in the rotatable part, each communicating at one end with one of the tubular conduits and at the other end with the interior of the centrifuging device. The passages are defined in the lateral portion of respective cup-like elements arranged along the axis of the fixed part in fluid-tight connection with each other and with the fixed part.

Abstract: Methods for utilizing the heat content of a heated carrier agent are disclosed including indirectly contacting the carrier agent with a working fluid which boils at a temperature lower than water, in order to vaporize the working fluid, producing mechanical energy by expanding the working fluid to a number of reduced pressures, including the condensation pressure of the working fluid corresponding to atmospheric temperature conditions at the time, and a reduced pressure intermediate between the initial elevated pressure of the working fluid and that condensation pressure, separating the working fluid into separate streams corresponding to the working fluid at each of these reduced pressures, condensing the working fluid stream at the lowest pressure by indirectly contacting it with the atmospheric air, condensing the working fluid at the condensation pressure by indirectly contacting it with a liquid heat carrier, and repressurizing both of those working fluid streams for recycle.

Abstract: A process is disclosed for removing urea from blood wash fluids or blood fluids in which the fluids are treated with an organic solid containing at least one proton-containing secondary substituent group which masks and activates the aldehyde group and the fluids and the solid organic compound are separated.

Abstract: A tool for recontouring metal such as dents in the body of an automobile, for use in conjunction with an electrical welding apparatus, including a shaft on which a weight reciprocates, the weight being permitted to selectively collide with structure provided by the shaft to impart a force to the shaft along the longitudinal axis thereof, a portion of the shaft being electrically conductive and electrically connected to the electrical welding apparatus, the electrically conductive portion of the shaft for contacting the metal surface to be straightened, activation of the electrical welding apparatus welding the electrically conductive portion of the shaft to the surface to be straightened so that the forces transferred to the shaft by the weight can act upon the surface to be straightened.

Abstract: Disclosed herein are a method and apparatus for opening molds by automatically unlocking a pair of locking mechanisms which cooperate to lock a pair of mold sections together. There are also disclosed herein a method and apparatus for handling a removed mold section and an article ejected from another mold section.

Abstract: There is described a new and improved method of fracturing an underground stratigraphic formation penetrated by a well bore including the steps of pumping a stream of liquified gas into the formation to cause the fracturing thereof and then introducing proppants directly into the stream of liquified gas for injection of the proppants into the fractures. Prior to introducing the proppants into the liquid gas stream, they are cooled and pressurized to the storage temperature and pressure of the liquified gas.

Abstract: A device for the transfer of one or more substances between a gas and a liquid, the gas being introduced into the liquid in the form of bubbles from which the said substances are transferred to the liquid whereupon the excess gas is removed together with any substances transferred from the liquid to the gas. Characteristic for the device is a narrow annular gap (10), arranged vertically, for the liquid, a gas inlet (20), arranged in close connection to this gap (10), this gas inlet being adapted so that it introduces the gas uniformly distributed along the whole periphery of the gap (10), and means (34,36) for the removal of the excess gas.The device is intended in particular to be used as a so-called oxygenator when the said liquid is blood and the said gas is oxygen or an oxygen mixture. Carbon dioxide from the blood will then be removed together with the excess gas.

Abstract: A circuit arrangement for tuning into one of a number of radioelectric signals receivable on a signal receiver set is provided in accordance with the teachings of the present invention. The circuit arrangement consists of a controllable oscillator, whose frequency is determined by a control loop, in accordance with a binary number N. The binary number N is supplied by a processing unit on the basis of coded input data. Within the control loop, frequency division occurs so that a first signal is obtained from the controllable oscillator which is dependent at least on the number N. This first signal is then compared with a second reference frequency signal, to obtain a third signal for required tuning. A memory with a number of storage locations for storing data relative to signals tuned in digital form is also provided.

Abstract: A hanging rack includes a support member and at least one hanger which is removably attached to the support member. The support member is provided with an internal receptacle having a receiving station adapted to releasably receive a plug attached to the hanger. The receptacle also includes a locking station which communicates with the receiving station such that the plug can be moved from the receiving station to the locking station, where it is releasably locked in place.

Abstract: Apparatus for separating a liquid, such as whole blood, into fractions having different densities includes a separation chamber and a transfer device, such as a continuous piece of flexible tubing, for supplying the liquid to the separation chamber and discharging the liquid fractions therefrom. The separation chamber and the transfer device are conjointly rotated about a first axis which passes through a stationary end of the transfer device, while being simultaneously and conjointly rotated about a second axis which is coincident with a medial longitudinal axis of the rotating end of the transfer device so as to prevent the transfer device from twisting as a result of its rotation about the first axis.

Abstract: A tool transfer assembly for automatic milling machines perform rapid but stable replacement of a tool on a spindle head under direct control by a cam groove formed in an axially turnable and vertically movable shaft operationally related to holding jaws for tool holders while effectively utilizing power derived from two pneumatic power sources, thereby avoiding dissipation of the power conventionally caused by dividing it during transmission.

Abstract: A fusing machine utilizes a fusing electrode assembly and a ground electrode assembly suspended from the fusing electrode assembly. The fusing electrode assembly includes a lower fusing electrode shaft and an upper fusing electrode shaft. The lower fusing electrode shaft has an open end adapted to receive the upper fusing electrode shaft and a compression spring interposed between the shafts. An adjustable stop is threaded onto the upper fusing electrode shaft to limit the downward movement of the upper fusing electrode shaft. The lower fusing electrode shaft is keyed to a fusing electrode holder formed from a plurality of keyed members. The ground electrode assembly includes an adjusting mechanism, whereby the position of a ground electrode carried by the ground electrode assembly can be adjusted relative to a fusing electrode carried by the fusing electrode assembly. The fusing electrode assembly and the ground electrode assembly are mounted to a frame which is adjustably attached to a supporting structure.