Abstract: A rock drilling bit for a pneumatic percussion hammer has a bit head and an anvil extending up from the bit head and slidable in the bit drive sub of the hammer. So the bit will be rotated with the hammer without unduly stressing the anvil, the upper part of the bit head is of non-round cross-section and slidable in a socket of corresponding cross-section in the bit drive sub. If the anvil is not integral with the bit head, but is screwed into it, the lower part of the anvil is of matching non-round cross-section so torque applied by the rotating hammer is applied equally to anvil and bit head.

Abstract: An aeration and filtration pump for aquariums, including a housing formed with openings through which the aerated and filtered air can return to the aquarium tank, and an impeller enclosure member positioned within the housing. The impeller enclosure member includes an intermediate portion and an upper portion formed with spaced openings, with a screw impeller being positioned within said intermediate region of said enclosure member for impelling water upwardly within said member. Air impeller means are mounted above the screw imepller and force air drawn into said housing downwardly form aerating the water impelled upwardly by the screw impeller. Water is admitted to the bottom of the unit, and filter material is positioned between the converter member and the housing, with the aerated water passing through the filter material and the openings in the housing wall for return to the tank.

Abstract: A wall unit having a vapor-proof evacuatable envelope and a supporting core in the envelope. Wall shells form the outer sides of the element, and screw means extend through and rigidly interconnect the wall shells and thus the element, the screw means having flanges which can be adjusted toward or away from each other to adjust the pressure applied to the wall element by the screw means. Horizontal and vertical reinforcement means are pre-stressed and cast in the outer wall shell.

Abstract: A hollow-chamber composite structural element is capable of carrying high load and is prestressed in the direction of its length and against the direction of loading. The element comprises two outer structural shells connected with each other, with supporting elements arranged between them. A stressing spindle is arranged within the structural element parallel to the outer structural shells and coinciding with the intended main direction of loading of the structural element. The spindle bears axially spaced threaded sleeves which are fastened in non-rotating manner in the structural element and have flange-like transverse supports which are operatively connected at their free edges with said outer structural shells.

Abstract: This invention provides a heat-sealing thermoplastic adhesive of a thermoplastic polymer which is resistant to washing and dry-cleaning, which contains from about 0.05 to about 5% by weight, based on the weight of said polymer, of at least one hydrophobic silicone compound.The invention further provides a process for heat-sealing a substrate which has been at least partly hydrophobized with a silicone compound, which comprises the steps of coating with a heat-sealing thermoplastic adhesive of a thermoplastic polymer which is resistant to washing and dry-cleaning and which contains from about 0.5 to about 5% by weight, based on the weight of said polymer, of at least one hydrophobic silicone compound, sintering, fixing and heat-sealing.The adhesives according to the invention are useful for the bonding of substrates which have been hydrophobically finished with silicone compounds, such as raincoat fabrics.

Abstract: A power branching transmission, having two parallel output shafts, each of which carries a rotationally rigidly connected ouptput drive pinion, the output drive pinions being axially offset with respect to one another and each meshing with a respective rotatable ring gear and with a respective central gear wheel disposed in the respective ring gear, a pair of driving pinions rotationally rigidly disposed on parallel drive shafts and each meshing with a respective one of the ring gears and a respective one of the central gear wheels, each of the ring gears and each of the central gear wheels having at least one coaxial race with at least one supporting roller disposed between the races and bracing the respective ring gear and associated central wheel with respect to one another. No housing is required, tooth forces of the ring gears and central gears being accommodated by the supporting rollers and not transmitted to the radial bearings of the input end output shafts.

Abstract: An exterior rear vision mirror for a vehicle is rotated about its axis, within its housing, by an electric motor, and is restrained from significant vibration by a flexible drive from the motor to the center of the mirror, and by stabilizer ring coaxial with the mirror and pressing against it to maintain it in the desired plane. In wet conditions, rain drops are thrown centrifugally from the mirror, keeping it clear. In dry conditions, the mirror may be cleaned of dust by water directed from a nozzle onto the central part of the rotating mirror.

Abstract: A target formed from a material comprising a mixture of polyethylene and talc. The inclusion of talc improves the properties of the target at temperatures ranging from in excess of 60.degree. C down to minus 20.degree. C or below.

Abstract: A shower device having a water injecting portion consisted of a nozzle plate having a plurality of nozzles thereon and a cover having water jet holes of the same number positioned respectively to correspond to said nozzles at a given distance. Said nozzles and water jet holes are all tapered to have a smaller diameter towards the outlet side of the device. Between the cover and the nozzle plate, an air chamber is formed by means of which air is sucked in by the gushing water, and jetted out in a state of minute foam mixed with water. When the water jet strikes against one's body, the minute foam ruptures in succession generating minute pulsations and supersonic waves thereby to provide a massage and hot spring bath effect. The shower device is simple, easy to fabricate, and handy to use and disassemble for cleaning.

Abstract: Extruder and twin roller calendering plant for producing films or sheets of synthetic plastics or rubber material comprising a pair of calendering rollers mounted in a calender frame and an extruder nozzle head directed into the gap between the pair of calendering rollers, the calender frame being pivotally mounted such that it can be pivoted away from the extruder nozzle head to allow ready access to the extruder nozzle head. The calender frame may be pivotally mounted on the nozzle head and a counter balance weight and/or the drive motor for rollers can be mounted on an opposite side of the pivot to the rollers thereby to counter balance the weight of the rollers.

Abstract: An aqueous coating composition free from phenolic resin containing a binder dilutable with water by neutralization with a base is disclosed. The coating composition is particularly useful for electro-dip-lacquering.

Abstract: A polarimeter comprises a polariser and an analyser between which is disposed a sample whose optical activity is to be determined. Light passes through the polariser, sample and analyser to a light detector responsive to the intensity of the light transmitted by the analyser. The polariser has a fixed orientation and the analyser is rotated by a motor which is driven in synchronism with digital clock pulses. The phase of the output signal from the light detector is compared with the phase of a digital signal derived from the clock pulses to determine the optical activity of the sample.

Abstract: Apparatus for discharging bulk material into a pneumatic conveyor conduit has two chambers, one disposed above the other, the upper chamber having an inlet orifice controllable by a pivotal closure flap and the lower chamber communicating with an outlet orifice from the upper chamber, also controllable by a pivotal closure flap. The flaps are balanced as by counterweights so as to leave their respective orifices virtually completely open in the absence of outside force acting on the flaps, and pressure nozzles are disposed adjacent the flaps in their fully open position, to assist movement towards their closed positions as required. A level sensing means is arranged in the lower chamber to sense when material therein drops to a predetermined level, for re-filling of the chamber from the upper chamber.

Abstract: A mutation of the cultivar Camino Pink. All characteristics of Camino Coral are similar to the present cultivar except the ray floret color, which for Camino Coral is greyed-red, as contrasted with the lavender pink of Camino Pink.

Abstract: An African Violet known by the cultivar name Alabama and particularly characterized by its flower color, which is predominantly white, with blue-purple centers and edges, wavy and frilled flower edges; vigorous growth habit, and by its flower production, with up to 10 individual flowers being carried on each flower stem.

Abstract: An African Violet known by the cultivar name Arizona, characterized by dark green leaves and strong upright peduncles each of which carries 10-12 individual flowers; generally red-purple flower color, with a tendency toward lighter streaking in the petals extending generally radially in the petal from the center of the flower, with the flowers being non-dropping, and having a prolific flowering characteristic which provides a full and tight bouquet above the foliage.

Abstract: The new anthurium cultivar Senior II is characterized by its fiery red, generally heart-shaped spathe which have a wavy surface and a slight indentation along an edge thereof. Straight and wiry petioles position the spathe slightly above the leaves, which are medium to dark green. The new cultivar has an early blooming habit, a slightly spreading growth habit, and can be asexually reproduced only by tissue culture.

Abstract: The new anthurium cultivar Senior I is characterized by its fast and compact growth habit; orange-red, generally heart shaped spathe having a grooved or ridged surface and a slight indentation along one side thereof; early blooming habit; straight and strong petioles, light to medium green leaves which provide an attractive contrast with the orange-red spathe and white-yellow spadix; propagation by side shoots or tissue culture, and by its suitability for pot production.

Abstract: A wall unit comprising oppositely disposed panels defining a cavity between them, the cavity containing insulating means and being filled with dry air or other dry gas, for example nitrogen, the cavity being connected to a volume compensation device for the air or gas.

Abstract: A chrysanthemum plant known by the cultivar name Quills and particularly characterized as to uniqueness by the combined characteristics of flat capitulum form; spooned daisy capitulum type; white ray floret color, devoid of pink discoloration; diameter across face of capitulum ranging from 65 to 100 mm. at maturity; uniform seven week photoperiodic flowering response to short days; medium plant height when grown as a pinched spray pot; semi-upright branching pattern, and minimum pollen production.