Abstract: In a track laying vehicle (10) a track tensioning apparatus wherein a track engaging idler (20) wheel is mounted to a cross member (82) for adjustment to tension the track by a piston (68) and cylinder (62). The cross member (82) is in turn adjustably (106) mounted to opposing sides (26,27) of the vehicle track frame. Acting in conjunction with the track tensioning apparatus an accumulator (130,146) is provided and is in fluid communication with the piston (68) and cylinder (62). The accumulator (130,146) exerts a backpressure upon the fluid so that the idler (20) may recoil in response to excessive tension or shock upon the track.

Abstract: A board for sliding on snow is provided and has nose, intermediate and tail portions. The nose and tail portions have a thickness that will not deform under the weight of a user. The intermediate portion has a thickness that it will elastically bend under the weight of a user. The board is shaped into an inverted arch and has a side plate mounted on each of the side edges to extend longitudinally thereof. Step-decks for the user's stance are located on the respective connections between the nose and intermediate portions and between the intermediate and tail portions with the step-decks being inclined downwardly toward the intermediate portion. The tail portion has at least one pin tail configuration and includes a fin-box embedded at the bottom of said pin tail. The fin-box includes a fin which is detachably mounted therewithin such that the fin will be released when a force is applied thereto that is stronger than a predetermined level.

Abstract: A circuit for computing a signal representing the pitch attitude of an aircraft utilizes angle of attack based information and the output of a gyroscope to produce a calculated pitch signal which has a long term component dependent upon the angle of attack based information and a short term component dependent upon the gyroscope output signal. The calculated pitch signal may be used to pitch stabilize a head up display in the aircraft and in this event is modified with a correction signal derived from the pitch signal and the output of a head up display mounted accelerometer. Alternatively, the pitch signal may be combined with a signal representing the difference between the output of the display mounted accelerometer and the output of an angle of attack vane mounted accelerometer to provide a pitch stabilization signal which is free of turn and shear errors.

Abstract: A transparency viewing system employs an illuminated viewer adapted to be used with an overlay device and/or film retaining clips. Brackets are provided to define longitudinal open channels at opposite edges of the illuminated viewing surface. The overlay device is of a size to span the viewing surface such that the marginal edges thereof, which have a configuration similar to that of the open channels, may be inserted into the open channels so that the overlay device is held against the viewing surface. Each retaining clip includes a mounting portion having a configuration similar to that of the channels and may be adjustably positioned along the channels so that its operating portion is biased against the viewing surface to hold transparencies placed between the clip and the viewing surface in position.

Abstract: A framework structure defined by a first plurality of tetrahedral elements laterally juxtaposed in a first array and a second plurality of tetrahedral elements laterally juxtaposed in a second array, with the projecting apices of the first array received in the spaces between the projections of the second array and the projecting apices of the second array received in the spaces between the projections of the first array. In the illustrated embodiment, the bases of the tetrahedral elements of the first array define a common plane and the bases of the tetrahedral elements of the second array define a common plane extending parallel to the plane of the first array bases. The tetrahedral elements in the illustrated embodiment are formed of edge elements and corner connectors. The corner connectors are secured in interconnected association and, in the illustrated embodiment, the corner connectors are secured by connecting plates.

Abstract: A catalyst, a method of preparing a catalyst and method of polymerizing olefins with the catalyst in which the catalyst is prepared by reacting a support with a Group IIA organometallic compound essentially free of aluminum alkyls and reacting this product with water or a hydrocarbyl alcohol, then reacting this product with, for example, titanium tetrachloride, followed if necessary by removing unreacted ingredients and finally activating by contacting with a cocatalyst in the absence of oxygen and moisture.

Abstract: A digital data recorder has a microprocessor control which directs data to the read/write transducer and actuates the tape drive. The recorder accepts data in serial digital form and has an analog-to-digital converter-multiplexer which receives analog data and adapts it for digital recording. Data is read from the tape through an output connector to one of several retrieving devices. An identifying input to the microprocessor from the retrieving device provides for control of the read transducer and the tape drive to direct the appropriate data to the retrieving device.

Abstract: A wick applicator for herbicide which includes first and second horizontally elongated conduits. The first conduit is elevated above the second conduit and a plurality of wicks extend between the conduits and are in fluid communication with the interior of each. Herbicide is provided to the interior of the first conduit while a vacuum is applied to the interior of the second conduit to withdraw herbicide therefrom which is directed thereto by the wicks. A pump is utilized for the purpose and the same recirculates the herbicide back to the first conduit to conserve on herbicide use and to provide a fine degree of control over the flow rate of herbicide through the wicks.

Abstract: A method of making a heat exchanger of the type used in vehicle radiators and having a core of spaced welded, as contrasted to lock-seam, tubes and interconnecting fins connected to spaced liquid tanks.

Abstract: A heat recovery unit is adapted for installing in a cookery cupboard or the like space in a dwelling. Within a casing (3) the unit has a lamella heat exchanger (1), which is arranged on one corner edge and has two of its defining surfaces provided with openings for passages facing upwards and two downwards. The heat exchanger has its end walls (8) oriented in vertical planes. It is adapted for heating supply air (9, 10) through heat take-up from exhaust air (11, 12). Four vertical wall portions (13, 16) form a cross above the heat exchanger, thus providing four chambers for the ingoing and outgoing air flows (9-12). By means of portions airtightly sealed against the casing (3) and wall portions (13-17) the heat exchanger is divided into two portions, each having a cross-stream course between supply air (9, 10) and exhaust air (11, 12), with its passages for supply air and exhaust air arranged in series with the corresponding passages of the other portion.

Abstract: A brake system (10) providing a self-bleeding and self-cleaning operation as a function of selective positioning of the transmission control (16) of the vehicle. The brake (12,13), in the illustrated embodiment, is a spring-applied, hydraulically released brake permitting the piston (24) to force hydraulic fluid and accumulated air from an upper portion (34) of the brake pressure chamber (23) outwardly through a bleed line (33) in which a flow restrictor (35) and a check valve (36) are provided. A brake fluid inlet supply line (14) communicates with a lower portion (22) of the pressure chamber (23) so as to permit flushing of debris from the lower portion (22) of the pressure chamber (23) concurrently with the self-bleeding operation.

Abstract: A marine fender structure including a plurality of rollers rotatably mounted on a pair of flexible elongated supports. Horizontal spacers are provided at vertically spaced intervals along these supports to maintain the supports in horizontally spaced relationship whereby the rollers may freely roll along the side of the marine structure for facilitated functioning thereof in serving as fenders. Retaining structure is provided for retaining the rollers and spacer elements in association with the support elements in groups of a pair of rollers and one of the spacer elements at vertically spaced positions along the fender structure. In the illustrated embodiment, the spacer elements define rungs permitting the fender structure to further serve as a ladder.

Abstract: A portable abrading cabinet device is provided for use in a recycling abrasive blasting system. The cabinet device includes a cup-shaped housing affording an inner blasting chamber. The forward open end of the housing has a peripheral resilient seal to provide airtight engagement with the surface to be abraded. The housing has an inlet aperture for the barrel of a sand blasting gun which delivers rapidly moving abrasive material to the surface to be worked. A funnel-shaped exhaust means in the housing terminates in a fitting which detachably receives a conduit connected to accommodate an external source of vacuum so that spent abrasive and debris may be removed from the inner blasting chamber of the cabinet housing. A transparent window member in the housing permits an operator to observe the abrading operation, the window member being partially shielded by a pair of deflectors which redirect ricocheting abrasive and debris within the cabinet housing.

Abstract: An aseptic packaging machine includes a chain conveyor conveying cartons along a path in an aseptic chamber including an advance leg and a return leg each along the machine. Ultra-violet germicidal lamps extend over at least a major portion of the advance leg. Aseptic liquid is fed into the cartons by a filling device comprised of, in turn, an expansion chamber, a non-return inlet valve, a reciprocatory bellows and a non-return valve. After filling, the cartons are top-sealed. The only non-aseptic matter deliberately introduced into the chamber is the cartons. The chamber is cleaned internally by cleaning fluid from spray nozzles. The carton entry to and exit from the chamber have aseptic air curtains.

Abstract: A floor cleaner motor mount wherein the motor is resiliently pivoted to provide the desired disposition of the belt in a cog drive belt extending between the motor and a rotatable brush of the cleaner located in a nozzle portion of the cleaner. The pivot axis is disposed so as to permit the axis of the motor shaft to be angularly adjusted relative to the axis of the brush. The pivot may be provided at one end of the motor housing. In the illustrated embodiment, the motor is adjustably positioned by a leaf spring acting against a base portion of the nozzle housing intermediate the pivot and drive connection.

Abstract: There is described a level-indicating device provided with a mounting the device in a wall of a bunker, tank or other container, a system for drive motor mounted to be freely rotatable about the axis thereof, an oscillating transmission unit connected to the drive motor, with an output shaft and a vane mounted on said shaft, whereby the drive motor is provided with switching means to generate a signal and to cut the motor off when the vane meets a resistance. Sealing means are provided for the sealing between the rotatable vane shaft and the mounting. The transmission unit is so designed as to cause a swinging motion of the vane due to the drive motor rotation, while the sealing means comprise a completely closed flexible sealing member which is positively connected on the one side to the vane shaft and on the other side to the mounting.

Abstract: A catalyst and method in which the catalyst is used in association with an aluminum cocatalyst in the polymerization and copolymerization of 1-olefins. The catalyst is prepared by reacting certain organic silicon compounds with silica, alumina or the like having surface hydroxyl groups, or a mixture thereof, in which the silicon compound reacts with these surface hydroxyl groups, followed by reacting the product of this with an organomagnesium compound and further reacting this product with an alcohol or reacting the product with an alcohol and then with an organomagnesium compound and then with a halide or alkoxide of titanium, vanadium, zirconium or mixtures of these.

Abstract: A skin washer having a conveyor belt which carries a skin from a loading station to and through a washing station with back-up members for the conveyor belt at the washing station. A plurality of driven brush rollers, located to deflect the conveyor belt between the back-up members, cause a partial wrap of a skin carried by the conveyor belt around the brush rollers for good cleaning action by the brush rollers. The skin washer includes a reversible drive for a first of the brush rollers whereby the first brush roller rotates in a skin-advancing direction as a skin is conveyed into the washing station and thereafter is caused to rotate in a direction opposite to that of skin travel for exerting a retarding force on the trailing portion of the skin.