Abstract: A fold roller is disclosed for use in paper folding machines, to rip sheets of paper advanced for folding which roller includes a metal core with a resilient sleeve bonded thereto, the surface of the sleeve having ribs with flat faces separated by helical grooves thereon from one end to the other, providing for paper folding with reduced side slip and expelling debris picked up from the surface of the sheets of paper while maintaining constant grip.

Abstract: Flexible mud flap brackets are provided for use on trucks, tractors or trailers which are mounted to extend out from the frame, in back of the wheels and include an outer end portion that can be deformed and returned to normal position without damage to the bracket or the mud flap.

Abstract: Tanks for mixing apparatus are described in which one or more chemical materials are to be incorporated in a carrier liquid, which may be a solvent, such as water, and which is quantitatively predominant, some of the chemical materials being incompatible if brought together directly, or in a wrong sequence, or which are difficult to combine, the materials preferably being combined in the desired proportions in a cascaded arrangement of liquid filled chambers, the respective materials in the desired proportions preferably being supplied from separate sources of materials by pumps, the delivery of the carrier liquid being to a first mixing chamber in the tank to which a first chemical material is supplied, additional and successive mixing chambers being provided, if desired, the tanks being constructed of synthetic plastic material molded to provide a body to receive partition walls for attachment to the body, and a cover preferably transparent and molded to receive the partition walls, the cover preferably hav

Abstract: Fastenings for storage racks having upright columns or posts connected in pairs with diagonal bracing are disclosed and which include gussets or locking plates for locked engagement with vertical portions of the posts and with horizontal crossbeams to connect pairs of connected posts at selected levels.

Abstract: Game apparatus is disclosed having a top wall with openings for the insertion of pins by two players as called for by indicia on a rotatable signal disc below the top wall but which indicia is visible through openings in the top wall, the pins may fall through the top wall and signal disc as determined by programmed openings in the disc and preferably pass through a counter for delivery by a chute to a return opening for each player, the signal disc being propelled by a spring motor during a predetermined time interval.

Abstract: A heat resistant fabric is provided, preferably woven, and with an optional aluminized backing, the fabric being made from yarns having a core of flame and high heat resistant non-melting heat stabilized polyacrylonitrile fibers covered by a layer of aramid fibers or other heat resisting fibers with or without blending with other fibers, the covering layer providing a cushion to provide increased abrasion resistance of the core while also providing a heat resistant covering for the core.

Abstract: A drive mechanism is disclosed for photographic film and paper processing machines employing a plurality of processing tanks in succession and with roller transports therein for the film and paper, as well as for other components of film processing machines including area measuring apparatus and driers for the film and paper, which drive mechanism eliminates the necessity for careful alignment of the transverse drive shafts for the respective components, the transverse drive shafts for each of the components preferably being loosely pivotally mounted in the frame of the component at one end and loosely carried in the frame of the component at the other end, with provisions associated with the main frame of the machine for retention of the transverse drive shafts, a drive gear mounted on each transverse drive shaft meshing with a worm gear mounted on a longitudinal drive shaft which is supported by the machine frame at spaced locations along its length.

Abstract: Laminated insulation is provided that is of increased efficiency without any great increase in the total thickness of insulation used which has an internal reflector which reflects back both hot and cold air from the internal reflector. The structure includes a plurality of plastic skins with air bubbles trapped therebetween which structure is laminated to other types of insulation and may have internal provisions to increase its strength.

Abstract: Decorative fabrics and methods of making the same are disclosed the fabrics, depending upon their constituents serving a wide range of uses, including wall coverings, floor coverings, upholstery fabrics and fabrics useful for other purposes. The fabrics have an exposed decorative face, preferably composed of parallel longitudinal yarns, which are brought together onto a supporting web and then passed through a needle loom so that fibers from the face extend through and are exposed on the back. Various provisions may be made to achieve the integrity of the decorative fabric including the application onto the back of the supporting web of a bonding coating, or application by an adhesive of a backing of paper or other type web, and additionally, if desired, of a felt or other backing including a resilient or sound absorbing backing.

Abstract: Mixing apparatus is described in which a plurality of chemical materials are to be incorporated in a carrier liquid, which may be a solvent, such as water, and which is quantitatively predominant, some of the chemical materials being incompatible if brought together directly, or in a wrong sequence, or which are difficult to combine, the materials being combined in the desired proportions in a series arrangement of liquid filled rotary motor driven pumps, the respective materials in the desired proportions preferably being supplied from separate sources of materials by reciprocating pumps, the delivery of the carrier liquid being to a first rotary motor driven pump to which a first chemical material is supplied, the first rotary motor driven pump having a fluid connection between its intake and delivery portions for repeated circulation and agitation of the liquid for mixing, with a tap for fluid input of the carrier liquid and first chemical material and a tap for fluid delivery connected to a fluid connecti

Abstract: An adjustable expansible chamber pump for liquids is disclosed, which is resistant to corrosion and which preferably utilizes a compressible bellows of synthetic plastic material, which is compact, which has improved expansible chamber actuating mechanism comprising an adjustable eccentric driving member to vary the stroke to adjust the quantity of liquid delivered, the adjustment of the eccentric being easily accomplished and the setting being visible and approaching linearity and adapted for delivery of small quantities of a specific component, the pump being readily employed with similar pumps for simultaneous or staggered pumping of a plurality of liquids for mixing and which can utilize a single driving motor.

Abstract: Apparatus for processing photographic materials is disclosed and more specifically equipment for turnaround during processing of an elongated web of photographic material at the midportion of a processing operation, the web being guided in part by inner and outer rollers with endless belts for guiding the web in an arcuate path.

Abstract: A solar heating system is described which includes solar heat collectors mounted on the roof or side of a building facing toward the sun with air in contact therewith for heating, which air is circulated through ducts in a heat storage unit, the air flow being controlled by a differential thermostat which provides heated air to the storage unit so long as the temperature of the air in the heat collectors is a few degress above that of the storage unit. The heat storage unit has ducts therein communicating with the interior of a building but separate from the ducts attached to the collectors for transferring stored heat from the storage unit to air to be circulated within the building. The air circulation within the building is controlled by a thermostat attached to a blower and to a source of auxiliary heat when the temperature in the storage unit is below a predetermined level. The storage unit may have a pipe loop passing therethrough for pre-heating the water for a domestic hot water heater.

Abstract: Apparatus for extracting tubes from the tube sheets of a heat exchanger is provided which is particularly suitable for the removal of tubes of small internal diameter and which includes a tube pulling dart having a tapered threaded end for engagement within the tube and a sleeve secured thereto for automatic attachment of a power operated pulling mechanism. The threads on the dart preferably have a right triangular cross section with vertical faces for applying the load from the threads onto the tube to be extracted. In another embodiment the attachment is manual.

Abstract: An electric motor driven bilge pump particularly for marine use is described having an outer housing of molded synthetic plastic having inlet openings for the liquid to be pumped with a bottom closure plate detachably secured thereto and a motor housing of molded synthetic plastic carried in the outer housing and containing an electric motor with a vertical shaft extending below the motor housing and having an impeller thereon, a pump housing or chamber of molded synthetic plastic carried on the lower end of the motor housing and supported and positioned in the outer housing, the outer housing having a space therein for a float operated motor controlling switch carried on the pump chamber, the motor housing having packing members for preventing leakage from the pump chamber to the motor chamber with provisions for cooling the pump bearings.

Abstract: A valve for the control of corrosive fluids is disclosed which includes a spring returned valve spool in a valve housing, the valve being manually movable by actuation of an exteriorly accessible handle, the valve spool being connected to and movable with a pipe for dispensing, the handle being removably carried on the valve housing, the valve housing having separable portions for access to the interior, the valve spool having a central passageway communicating with the dispensing pipe and having spaced packings movable in a bore, the spool in one position having one packing positioned to permit access of fluid to the central passageway while the other packing prevents access of fluid therebeyond and protects other components associated with the valve spool.Provisions are also made for locking the spool valve to prevent unintended fluid delivery.

Abstract: Equipment is provided for processing of photographic film and paper using roller transport systems which transport the photographic film and paper through a succession of processing tanks with liquids therein for processing and in which the respective liquids are agitated simultaneously with the operation of the transport systems by agitators within the tanks.

Abstract: Trolling apparatus with controlled reel rotation is described which includes a large diameter reel rotatably mounted on a base with a drag assembly in contact therewith, and a handle for rotation mounted directly to the perimeter of the reel, with line from the reel passing over a pulley and through a bracket for bait attachment. The controlled rotation of the reel for winding and unwinding of the line is attained by direct manual manipulation, and by engaging and disengaging a dog assembly which may be manually or automatically actuated and which provides a drag on the reels' rotation.

Abstract: Unloading apparatus for vacuum electric furnaces having a hostile environment is disclosed in which a compartment is provided to which work pieces are delivered from such a vacuum electric furnace, transferred from the furnace by movable supporting and transferrng arms which are normally in the hostile environment onto an elevator platform at a central location and then elevated for transfer to other equipment, all under vacuum. The movable arms are first raised and then turned by hudraulic actuators and the elevator platform is also positioned by a hydraulic actuator. The elevator platform and its enclosure are normally screened from radiant heat by a door which is swung from a vertical position for shielding to a horizontal position to permit access of the movable arms and the work pieces thereon to the elevator platform.

Abstract: A work support for vacuum electric furnaces is provided for furnaces in which work pieces to be processed are placed inside a vacuum electric furnace chamber which is evacuated with a mechanical pump and then backfilled with a partial pressure of gas containing nitrogen, such as nitrogen or ammonia, or a hydrocarbon such as methane, or mixtures thereof. The work pieces to be processed are electrically connected to the negative (cathode) terminal of a D.C. power supply, and insulated from the chamber wall which is connected to positive terminal of the D.C. power supply and to ground for safety. The power supply is energized and a portion of the gas is ionized. The work pieces are heated to temperatures of approximately 650.degree. to 1100.degree. F. for ion-nitriding or to temperatures of approximately 1650.degree. to 1900.degree. F. for ion carburizing. The heating is effected at least in part by the ion activity but auxiliary heating elements may be used if desired.