Abstract: A refrigeration system utilizing cooled spillover air from a refrigerated display case 10, the spillover air being recovered and removed from the ambient space through openings 9. The recovered spillover air is conducted through conduit 29 in heat exchange relation to a subcooler 33, lowering the temperature of refrigerant passing to the display case evaporator 19, the still cool spillover air then being used in a space air conditioning system 30.

Abstract: A process for the production and purification of human interferon derived from leukocyte of lymphoblastoid cell origin characterized by a sequence of steps involving chromatography of a solution of crude interferon on porous glass, utilizing three new classes of eluants for recovering the interferon bound to the porous glass, followed by cation exchange chromatography and finally chromatography on a hydrophobic sorbent material which process produces a final purified interferon in its natural form containing those protein components which are normally labile to low pH treatment along with those components which are pH stable. In one aspect, the improved method of purification also includes the optional molecular filtration of the crude interferon prior to initiating the purification process. In yet another embodiment, a new process for producingThe invention described herein was made, in part, in the course of work under grant No. NOI-HB-2920 awarded by the National Heart, Lung And Blood Institute.

Abstract: An improved support (48) for mounting a crescent shaped squeegee assembly (46) on the body (18) of a self propelled walk behind floor scrubbing machine (10) of the type which deposits cleaning fluid on a hard surfaced floor, scrubs the floor, and then squeegees and vacuums the dirty cleaning fluid from the floor. The squeegee supporting means (48) includes first and second intermediate members (84, 98) and first, second, and third pivot means (68, 70, 72). The first pivot means (68) secures the first intermediate member (84) to the body (18) for swinging movement about a generally vertically extending axis (Z). The second pivot means (70) secures a forward portion of a downwardly and rearwardly extending arm (90) to the first intermediate member for swinging movement about a generally transversely extending axis (Y). The second intermediate member is secured to a rear portion of the arm, the securing means including an attitude adjusting member (102).

Abstract: A device for generating and radiating ultrasonic sound waves for the control of pests such as rodents, insects and the like comprising a housing having at least two surface portions, an electrically operated sound generator carried by the housing associated with one of the housing surface portions for providing output sound waves directed outwardly from the one surface portion of the housing and in an ultrasonic frequency range normally inaudible to humans and intolerable by pests such as rodents, insects and the like, and a pair of spaced-apart prongs of electrically conducting material extending from the other of the housing surface portions and connected electrically to the sound generator and adapted for insertion manually into the socket of a standard electrical outlet receptacle commonly found in buildings and the like for supplying electricity to the sound generator and simultaneously supporting and holding the device.

Abstract: In a device for preventing overload of a vehicle winch, including a line drum, a motor and a planetary gearing between the line drum and the motor, there is a sensor comprising a planet carrier of the planetary gearing. When the winch is overloaded the planet carrier is rotated to a limited extent against the action of a spring force to actuate a switch forming part of the device which interrupts further operation of the winch.

Abstract: An office accessory system for use on both horizontal and vertical surfaces and in both conventional and open-plan environments. Accessories are provided, each being self-supporting on a horizontal surface, one of them being self-supporting on a horizontal surface in either a horizontal or a vertical orientation. The accessories have recesses for receiving support hooks engageable with the arm of a cantilever support. The cantilever support has an attaching bracket which is selectively engageable with the side channels found on a wide variety of open plan wall panels for mounting the accessories thereon in a vertical orientation.

Abstract: A torsion type exercise device including three sections hinged to each other in a manner which allows the device to be folded up so that the three sections rest in a position adjacent to each other and to be folded out to allow the said three sections to form a platform upon which exercises can be performed. One of the sections has a handle fastened to it to facilitate transporting the device in the folded condition. One of the sections has fastened to it a strap or device which can be used to fasten an individual's legs or other body parts to the platform during the performance of "sit-ups" or other exercises requiring or facilitated by the fastening of an individual's legs or other body parts to the platform. One of the sections contains an adjustable torsion spring mechanism connected to pulleys, cables, and handles fashioned in a manner to offer an adjustable resistance to an individual's muscular movements as he pulls on the handles.

Abstract: A swimming pool construction incorporating solar heating means to heat the pool water to a desired level. The pool includes a surrounding safety fence supported by a plurality of fence supports which are hollow and which include internal passageways. The pool water is passed through the pool support passageways whereupon it absorbs heat from the sidewalls of the fence supports, the surfaces of which have been heated by solar radiation. The fence supports can be made of plastic or other materials, but preferably are dark for improved absorptivity. The pool water can be passed serially through each of the fence supports and suitable thermostat control means can be provided to limit the water temperature increase.

Abstract: A shielding arrangement for a coating thickness device utilizing the radiation backscatter technique. An isotope housing is provided having an aperture through which radiation can pass. A removable cover shield is attached to the housing to cover the aperture when the device is not in use. Means are provided to remotely remove the cover shield from the housing and expose the aperture. A secondary shield carried by the device is provided to swing into and out of covering relationship to the aperture to block radiation passage through the aperture between measurements. The secondary shield is operatively connected with the operating handle of the device to coordinate movement of the secondary shield with the position of the isotope housing. A tertiary shield, which can be of transparent plastic material, is provided between the measuring zone of the device and the operator to provide additional shielding during the times the secondary shield is not in covering relationship with the aperture.

Abstract: An alternating current speed control of the type associated with an alternating current motor whose output speed is essentially constant, the motor speed control being capable of varying the output speed of the motor from two times normal output to zero. The rotor of the electric motor is mounted on a cylindrical gear case which is in turn supported by the output shaft of a differential gearing mechanism disposed within the gear case. Controller means are provided to brake a regulating gear within the differential gear assembly to vary the output speed of the electric motor.

Abstract: A rail to tie fastening including an elastic clip (12) a clip holder (15) and a locking element (6). The locking element (6) being interposed between the foot of the rail (11) and the clip holder (15) and, between the foot of the rail (11) and the clip (12) and is forced by the clip (12) against the foot (11). The locking element (6) is so shaped that any movement of the locking element (6) parallel to the rail (11), induced by longitudinal movement of the rail (11), results in the locking element (6) wedging between the clip holder (15) and the foot of the rail (11) so increasing lateral pressure on the rail to prevent further longitudinal rail movement.

Abstract: A method and apparatus for controlling the temperature of a space. The actual heat load for a space under the conditions prevailing at a time is determined based upon information available to a temperature sensor. The average heating/cooling percentage rate for relatively short duty cycles is adjusted based on this information whereby the actual heating/cooling load during this duty cycle interval may be approximately matched. The percentage rate may be overridden in the event an abnormal temperature situation exists. The method and apparatus of this invention has particular application when utilized with radiant heaters.

Abstract: An overload control for a mechanical press wherein excess hydraulic pressure generated by the mechanical overload of the press is applied to a transducer which develops an electrical signal which in turn is applied to a circuit which is responsive to the magnitude of the electrical signal and to the time increment during which the magnitude of the electrical signal is developed and applied to the circuit. The circuit includes a timing and reference portion comprising a voltage divider network and an RC network, and the circuit also includes a differential amplifier responsive to a difference in magnitude between the transducer signal and a signal from the timing and reference portion. As a result, when the instantaneous signal from the transducer increases suddenly due to an actual overload on the press, the circuit responds and operates a relay to cause stoppage of the press.

Abstract: Apparatus using radiation techniques for measuring coating thickness on continuously moving strip material as it travels along a predetermined path and without altering that path. A shuttle carrying a measuring probe having a radioactive isotope source and a detection device is provided in the path of the strip for reciprocation along a preselected segment of the path. The shuttle and the probe are releasably engaged with the strip and carried thereby for synchronous movement therewith in the direction of travel of the strip during a measurement cycle, and are disengaged from the strip when no measurement is being made, the movement of the shuttle then being controlled by an independent drive mechanism. The shuttle includes a strip guide plate which is tiltable about an axis substantially parallel to the longitudinal axis of the strip in order to orient the surface having the coating so it can be properly presented to the measuring probe.

Abstract: A rotary saw cutoff device for use on an automatic screw machine without the need to sacrifice a working station to accommodate the device, and which is narrower than a standard cutoff tool to reduce the waste loss due to cutoff. The working area of the cutoff device presents a slender profile to permit the device to be movable into and out of the working area of the automatic screw machine without interfering with the other parts of the machine. The saw blade is positioned at the outer edge of a frame in which it is rotatably supported, and it is driven through a gear train by an hydraulic motor. A driven gear is drivingly connected to the saw blade and is supported in bearings, one of which is positioned in a recess formed in one face of the gear.

Abstract: A method for disinfecting and/or sterilizing small objects such as medical and dental instruments and the like wherein the object to be disinfected and/or sterilized is contacted with a liquid, such as an aqueous solution of sodium dodecyl sulfate and carbamide, which is substantially transparent to ultraviolet radiation and has some bactericidal activity itself, at a temperature in the range from about 0.degree. C. to about 100.degree. C. and preferably at about 25.degree. C., and the object while contacted by the liquid is exposed simultaneously to ultrasonic radiation having a frequency in the range from about 8 kilohertz to about 300 kilohertz, preferably from 15 kilohertz to 60 kilohertz, with an energy density of application from about 10 watts/liter to about 5 watts/milliliter, and to ultraviolet radiation having a wavelength in the range from about 1500 .ANG. to about 4000 .ANG., preferably at about 2537 .ANG..

Abstract: The present invention is an explosively separable link provided in a strap assembly for automatic disengagement of two connected link members upon the occurrence of a predetermined event. The link assembly includes a first link member substantially in the form of a yoke having a pair of oppositely disposed coaxial apertures, one in each arm of the yoke. A second link member is provided and comprises a housing positioned between the arms of the yoke and includes a pair of opposed outwardly extending pins, each of which is cooperably received in one of the apertures in the yoke arm to permit relative rotation between the link members about the axis of the apertures. The housing in the second link includes a cylindrical bore coaxial with the axis of the apertures. Slidably positioned in the cylindrical bore are a pair of oppositely disposed piston members which are in substantially gas-tight relationship with the cylinder wall.