Abstract: A self-ventilating infra-red ray heater having cooperating housing, endplate and internal reflector structure which results in standardized construction of parts which may be included in single or multiple element heaters. The invention seeks maximum utilization of inexpensive sheet metal components to obtain heaters of low manufacturing cost especially suitable for use in portable heaters which may be oriented to direct heat in any direction. In the aforenamed structure, an internal reflector is received in an arcade-type housing to form a space or jacket enclosing except for openings in opposite ends of the crown of the housing for communication of the space with the atmosphere. Preferably the end plates are formed with flanges which overhang the openings with clearance to protect against entry of unwanted materials into the space.

Abstract: An air brake system designed primarily for a plurality of trailer axles in which a service reservoir is provided for each axle and a multiple valve module is connected with the reservoirs to assure a supply of parking brake air from any one of the reservoirs in response to various emergency conditions, such as severance of either of the tractor service or supply lines, or depletion of air in one reservoir.

Abstract: Disclosed is an apparatus for controlling the caliper of a web, such as a continuous paper sheet issuing from a nip of a plural-roll device, such as a calender. One or more rolls of the device is subjected to a multiplicity of air jets issuing substantially at constant flow rates but at temperatures which may vary as desired from nozzles spaced lengthwise of the roll.

Abstract: A tractor-trailer air-pressure brake system which includes a tractor protection control valve, a parking valve, and a trailer fill valve of special design provided for the purpose of achieving a desired non-confusing pattern of control positions whereby safety and convenience of brake operation is enhanced.

Abstract: Disclosed is apparatus and a system thereof for reclaiming heat through the transfer of heat from normally waste hot gases to a liquid medium, usually water, and redistributing the heat by way of the liquid medium to spatially distant heat exchangers. The heat exchangers employed for initial heat reclamation are of a design uniquely adapted to avoid plugging under freezing conditions.

Abstract: Disclosed herein a web-treating system equipped with web-threading apparatus having as principal structure, pulleys in endwise coaxial relation with web-conveying rolls, an endless drive cable extending over the pulleys, and a web-tail gripping device with transversely elongate elements thereof supported in the web path by the drive cable. Such elements and the pulleys are especially constructed to engage in an interlock condition as the elements traverse portions of the web path around the rolls so as to prevent the elements from centrifugally swinging away from the web path.

Abstract: Described herein is a valve sub-assembly which, e.g., functions as a portion of a modulating valve preferably subjected to operating pressures of less than two atmospheres. This sub-assembly is especially designed to reduce hysteresis in the response of the valve to signal media. Hysteresis reduction is achieved through a departure from conventional sealing mechanism designs which achieves a reduction in the friction involved in the operation of conventional modulating valves.

Abstract: Disclosed is a solenoid valve which is useful essentially as a control device for pressure-actuated equipment which responds proportionally to an electric signal transmitted to the valve in accordance with the strength thereof. The valve functions in perhaps its most important utilization to maintain a static pressure which may be varied in accordance with the strength of the current supplied to the solenoid of the valve. The valve is constructed for operation by which an output pressure is modulated, according to the current strength of the solenoid, between two supply pressures admitted to separate portions of the valve. One supply pressure is lesser and the other is greater than generally contemplated output pressure.

Abstract: Disclosed is a pressure-sensing transducer in which a transducing unit comprising a semiconductor-type strain element is confined within a housing defining a generally funnel-shaped chamber. The unit is supported within the housing in spaced relationship with the surface of the chamber by an electrically non-conductive cup-shaped member of relatively rigid material, and a resilient electrically non-conductive ring which is yieldably deformed by sealing engagement of outer peripheral surface portions of the ring with the chamber and the inner cup surface of the member, and the inner periphery of the ring with the outer circular surface of the unit. A viscous flow-resistant, electrically non-conductive liquid occupies any open space in the chamber for communicating pressure from a pressure source through the small end of the chamber to the element within the unit.

Abstract: Disclosed is a screw extruder having an upstream feed section in which the bore and screw is of substantially larger diameter than that in a downstream melting section. The two screws are structurally separable and may be operably independent of each other. The extruder is constructed for removal of the smaller screw outwardly through the downstream end of the extruder. Various arrangements for driving the two screws are disclosed herein.

Abstract: Disclosed is apparatus for simultaneously subjecting the inside and outside surfaces of a procession of containers to a gaseous treatment, such as the hardening by heating of a previously applied liquid coating. The containers each provide a closed end and another open end by which it rests on a conveyor which carries a procession of the cans through a treatment region. Structure is provided for the creation of a difference in air pressure as applied to different portions of the open ends of the containers to induce air currents interiorly of thereof.

Abstract: Disclosed herein is a trailer brake control system comprising a trailer-mounted servo-motor type booster in direct operating connection, e.g., by hydraulic lines, with the trailer wheel brakes, an electrical transducer and signal amplification apparatus mounted on the towing vehicle, and a solenoid synchronizing valve for controlling the booster operably positioned between the signal amplification apparatus and the booster for translating electrical signals of varying magnitude into correspondingly varying brake action. The system enables the operator of a tow vehicle and trailer combination to operate the trailer brakes with power-applied effort which is proportional to manual pedal effort applied to the braking system of the tow vehicle, or optionally, to operate the trailer brakes independently of the tow vehicle brakes to any extent desired through manual control of the signal amplification apparatus.

Abstract: Disclosed is an air horn comprising a housing and at least two amplifying trumpets attached thereto. Air may be fed from a single source into two sound-generating chambers with which the trumpets are connected by separate passageways to diaphragm-restricted openings of the chambers.

Abstract: Disclosed is a touch-sensitive apparatus adapted for mounting on the edges of mass transit vehicle doors. The apparatus provides an elongate flexible housing of which a proximal end portion is rigidly supported by a door edge, and a distal end portion may warp in response to manual pressure to operate a switch and switch actuating assembly enclosed within a longitudinal passageway of the distal portion which controls an electrical circuit for door-opening mechanism. The assembly includes a switch supported in one end of the passageway and a taut cable or other flexible member supported lengthwise of the passageway centrally through spaced support blocks.

Abstract: Disclosed below is a valve constructed with an electrical circuit extending through separable flow-control elements of the valve whereby the circuit may be opened by actual parting of the separable elements. For specific uses, the valve is characterized by structure permitting instant opening to full flow, high flow capacity, self-opening action, and latching mechanism for locking it in closed position.

Abstract: Disclosed herein is apparatus (1) for suspending hot sticky pellets discharged from a pelletizer into a swirling bath of liquid, (2) for transportation of the resulting slurry to a liquid and pellet separator in a manner which avoids agglomeration of the pellets, and (3) for recycling the liquid through the foregoing steps.

Abstract: Disclosed is a positive-pressure air brake system for a highway tractor and trailer combination in which the conventional mode of tractor-to-trailer control line connection is avoided and supplanted by a sub-system in which the trailer control line pressures are developed from the tractor supply line rather than its control line through a valve assembly which responds to tractor control line pressures in relay fashion to dispense brake-operating pressures to the control line of the trailer. This valve assembly is further disclosed as having mechanism for sensing differences in the pressures of the tractor and the trailer control lines, e.g., a difference resulting from the rupture of the trailer control line, to close off the air supply to the trailer and thus bring about emergency application of the trailer brakes without any material loss of pressure in either the supply or control lines of the tractor brake system.

Abstract: Apparatus and method for applying extremely thin coatings of liquid materials entering the apparatus at a viscosity in the range of up to 10,000 centipoises absolute viscosity through a combination of factors involving the use of at least four rolls of desired physical characteristics and roll speeds to continuously extract a relatively thick film from a pool of the liquid, reduce it to an ultra thin coating free of discontinuities, and unite the thin coating with a web.

Abstract: Apparatus for treating webs, such as found in pulp dryers, consisting essentially of elongate housings aligned transversely of a web path and having dispensing apertures for air or other fluid and feed openings arranged with respect to the apertures to direct the air perpendicularly toward the web path. Disclosed also are housings having duct means for returning the air dispensed by the housing to an air circulation system.