Abstract: Chaser for cutting threads on a work piece, the chaser having thread cutting formations with crests and roots, one flank of each of said formations being relieved at a first angle from the region of the crest toward the root and being relieved at a greater angle in the region adjacent the root of the formation. The chasers may be provided in sets with odd numbered chasers being mirror images of the even numbered chasers.

Abstract: A coin-controlled atomizer dispensing system is actuated entirely by compressed air or gas. At the conclusion of an operating cycle a cylinder is charged with liquid to be dispensed. The next operating cycle is initiated by inserting a coin which momentarily opens an air valve. A charge of compressed air and a charge of liquid are simultaneously fed to an atomizer nozzle until the charge of liquid in the cylinder has been completely dispensed whereupon the compressed air is cut off and the cycle is terminated by re-charging the cylinder with the next charge of liquid to be dispensed.

Abstract: Coal is transported through a hot carbonizing furnace chamber successfully on two endless traveling chain grates, the first of which is higher than the second and the second being run at a slower speed than the first so as to form a thicker bed than the coal on the first grate. Air is fed through the coal on the first grate in sub-stoichiometric amounts at low velocity so as to drive off the volatiles while air and steam are fed to the coal in the second grate in amounts sufficient to burn the coal. Gaseous by-products are exhausted from the furnace chamber and ashes are discharged through a conventional take-off.

Abstract: A disposable, individually packaged, self-contained topical application swab is disclosed. Liquid is initially stored in the swab and then caused to saturate the absorbent end of the swab immediately prior to application, thus eliminating spills and waste. The swab includes an absorbent material such as cotton, gauze, sponge, or the like attached to one end of a hollow plastic tube of small diameter which is sealed on the same end of the tube and which is sealed on the opposite end by a rubber cap. The unit is then inserted into a thin plastic tube of the same diameter as the absorbent material used on the swab to assure correct positioning of the swab. This exterior tube is sealed on one end by a plug containing a fixed lance. The other end of the exterior tube is sealed by the rubber cap on the swab when the swab is inserted into the tube. The entire unit may then be sterilized and strip packaged.

Abstract: A seam board pack consists of an elongate flat base, useable as a pounding board, having a central groove running lengthwise in its top. A plurality of upstanding flat seam boards are interchangably positioned in the slot. The seam boards have edges of various contours corresponding to the contours of the seams to be ironed flat.

Abstract: A lamp unit comprising a box-like body which is provided with one or more apertures covered with a sheet of material transparent to visible light and which houses a light source. In accordance with the invention the side (10) of the sheet (6) or sheets facing inwardly of the body (1) is, or are, covered totally or partially with a layer of a substance which fluoresces when irradiated with ultraviolet light, and the light source (7) is arranged to transmit ultraviolet light. In accordance with one preferred embodiment of the invention the sheet (6), or sheets, is, or are, made of a material which is transparent to visible light but impermeable to ultraviolet radiation.

Abstract: A valve such as penstock with a gate (13) which slides across an opening in a frame (10, 11, 12). On at least one side of the gate (13) is a two-part sealing strip consisting of resilient layer (22) and a superimposed bearing portion (23). Attached to or integral with bearing portion (23) is a thickened part (24) which limits the maximum compression of the resilient layer (22) when the valve is closed.

Abstract: A blade (9) for a paddle intended for paddling a canoe or corresponding water-craft, which paddle comprises a paddle shaft and a blade arranged on at least one end of the paddle shaft and intended to be inserted fully or partially into the water with the main-extension plane of the blade located substantially transversally to the longitudinal axis of the canoe or like watercraft during a so-called paddle stroke for forward propulsion of the canoe, where the one side (12") of the blade, which is intended to face forwards relative to the intended direction of travel, the front face (12") of the blade, is curved.

Abstract: A window for buildings, particularly dwelling houses and office buildings, comprising a frame and two or more glass window-panes, of which the window-pane located nearest a room has an electrically conductive layer applied to the side thereof remote from the room. In accordance with the invention there is provided a control circuit (8) for connection to a voltage source located in the frame (2) of the window (1). Also provided is a thermistor (14) which is in contact with the side of the window-pane (3) remote from the room and which is connected to the aforementioned control circuit (8) and arranged to produce or to influence an electric signal corresponding to the temperature of the window pane (3). The control circuit (8) is arranged to control the supply of current to the electrically conductive layer so that the window-pane (3) can be brought to a given temperature set by a potentiometer (16) connected to the control circuit (8).

Abstract: A thin-walled large diameter spiral plastic tube with interlocking helical seams made from a strip of polyethylene material. The strip of plastic has a thin configuration with edge constructions providing a bead formation along one edge and a groove formation along the opposite edge, which can enable an interlocked helical seam, in the spiral tube. The strip is fed into a special spiral pipe making machine for plastics which winds and interlocks the edges of the strip. Such tubing is used for ducts and pipes and, filled with expanded polystyrene beads can be used very advantageously as flotation devices. The plastic used in the strips is polyethylene, including medium and high density polyethylenes with high molecular weight (HMW).

Abstract: An extractor for an increment borer, which consists of a tubular body having internally a cylindric portion, which at its forward end 3 transforms to a conic portion 6, and which borer on its outer surface is provided with bore threads. The extractor 2 comprises a cylindric tube, the outer diameter of which corresponds to the inner diameter of the increment borer 1, and the inner diameter of which corresponds to the smallest diameter of the increment borer 1 at the forward end 3 thereof. An indent 11, preferably a V-shaped indent, or a slit is located in the wall of the forward end 9 of the extractor 2, so that said forward end 9 is deformed plastically when this end is pressed against the said conic portion 6 of the increment borer 1.

Abstract: A method for determining a mutual position between two objects, comprising transmitting a microwave signal from the first object towards the second object, causing the second object to receive the transmittal signal and re-transmit a signal, which is caused to be received by the first object. According to the invention the first object includes a transmitter/receiver unit (S/M-unit), which transmits the aforesaid signal (f.sub.o) from a transmitter antenna. The second object (T) is caused to re-transmit the aforesaid signal modulated with a signal (f.sub.m), the first object being caused to receive the transmitted signal through at least two antennae (M.sub.1, M.sub.2) placed symmetrically on a respective side of the transmitter antenna (S) and in an antenna plane common with the transmitter antenna (S). The angle (.theta.

Abstract: A fire resistant wall construction incorporating a phase conversion material the phase conversion of which takes place at a temperature below the temperature at which wood, paper etc. is liable to ignite. The phase conversion material includes a mass (2) produced from a mixture of water-glass in liquid phase and water and a binder such as cement or the like, the phase conversion material having a water content of such magnitude that the endothermic reaction taking place during the phase conversion process is essentially constituted by the vaporization of the water present.

Abstract: A method is described for indexing a polyform block in which a metal field shaping block is cast to both the cutting tray of a hot wire cutting system and the treatment tray of a radiation therapy treatment machine. The cast metal field shaping block is automatically correctly oriented for treatment. A cooling tray for cooling the casting is also described.

Abstract: A device for use in securing cargo in a stationary position on the bed of a truck or similar vehicle is disclosed. The device includes a movable partition having spring biased locking pins on the outer ends thereof which may be releasably secured in any of a series of holes spaced at intervals along a railing attached to either side of the length of the truck bed. Upon operation of a handle mechanism located in the central upper portion of the partition, the locking pins may be unlocked, allowing the partition to be moved on caster wheels mounted for movement along the interior length of the railings until the desired position is reached at which point the handle is released, causing the pins to lock into the adjacent openings in the railing.

Abstract: An invalid lift and transfer device has two rigid cantilever frames, a first of which is caster supported for rolling along the ground and a second of which is supported on the first frame for vertical movement, which movement is actuated by a jack engaged therebetween. A patient sling is suspended between opposite sides of the second frame. The frames, in aggregate, define between them a space which at a rear end is open laterally and vertically sufficiently to accept a wheelchair, bed, toilet or other patient support and which at the forward end is open up to a height sufficient to permit the leg and foot supports of the wheelchair, with the patient's legs and feet thereon, to project therethrough forwardly of the frames.

Abstract: A pneumatic spring counterbalance extensible link including a closed end cylinder with an end connector a piston and rod assembly within the cylinder and maintained therein by the crimped over end portion of the cylinder retaining a rod bushing and rod to cylinder seal. The cylinder is pressurized prior to assembly of the complete piston and rod into the cylinder. The piston assembly includes orifice by-pass arrangements either in the piston periphery or in a piston ring, and the piston may include a fail-safe provision in the event the orifice is clogged. A crimping die assembly is used in assembling and completing final assembly of the counterbalance components while simultaneously maintaining the link in a pressurized environment, utilizing sealed arrangement between the crimping dies to maintain pressurization of the interior of the dies and the counterbalance components prior to assembly of the components.

Abstract: A method, composition and containerized product for use in preventing the disease of mastitis in dairy cows and other animals. The invention employs a homogeneous disinfectant composition in the form of an aerosol spray which applies disinfectant to the teat while at the same time chilling the teat, particularly at the lower end where the teat sphincter muscle is located. Use of the present disinfectant composition, which contains an aerosol propellant such as dimethyl ether, results in chilling temperatures of about 25.degree. to 35.degree. F. being attained on the exterior surface and orifice end of the teat. By such treatment, the teat sphincter is caused to contract and close the teat orifice, thus reducing the incidence of infection.

Abstract: An extensible loading bridge for aircraft having an inboard end connected to a terminal and an outboard end adapted for connection to a parked aircraft. A heat exchanger on the outboard end supplies warm or cold air to the aircraft. Hot or cold liquid is supplied to the outboard heat exchanger from a source at the terminal end of the bridge and extensible flexible supply and return lines convey the hot or cold glycol to or from the outboard heat exchanger. A means is provided for maintaining the supply and return lines under tension and to take up and give slack to the lines when the bridge is retracted or extended.

Abstract: An extensible loading bridge for aircraft having an inboard end connected to a terminal and an outboard end adapted for connection to a parked aircraft. A heat exchanger on the outboard end supplies warm or cold air to the aircraft. Hot or cold liquid is supplied to the outboard heat exchanger from a source at the terminal end of the bridge and extensible supply and return lines convey the hot or cold glycol to or from the outboard heat exchanger.