Abstract: A windmill vane for use with a windmill having a vertical shaft. The vane comprises an open, rigid, planar, preferably semi-elliptical frame and a flexible sail on the frame. The frame can also be chevron shaped or semi-rectangular in shape. One end of the frame is affixed to the shaft, ad the other end is aligned therewith horizontally and radially outwardly from the shaft. The planar frame is oriented with a central portion leading the ends thereof relative to the instantaneous direction of movement of the frame around the shaft. The central portion of the frame is inclined at a 45.degree. angle upwardly from the frame ends relative to such instantaneous direction of movement. The sail is light weight, resilient, and preferably carried by a loose sleeve around the frame. The design of the vane ensures that the sail is full when moving with the wind and streams directly behind the frame when moving across and against the wind.

Abstract: A chain saw attachment for a portable chain saw. The chain saw attachment comprises a cutter head journalled on the cutter axle and having four planing knives, two mounting arms removably securable to the chain saw bar, a chain sprocket engaging and being rotated by the saw chain, a driving sprocket rotated in response to rotation of the chain sprocket, a driven sprocket fixedly attached to the cutter head, and a planer chain engaged by the driving and driven sprockets so as to transmit power from the saw motor to the cutter head. The planing knives are arranged conventionally on the cutter head. The mounting arms the ends of the cutter axle so as to hold the cutter axle and cutter head perpendicularly to the saw bar. A planing guide is provided for use with the planer attachment.

Abstract: A balanced door operating mechanism comprising a floor sheave, a door sheave, an arm extending between the wheels, and a cable rotatably coupling the wheels. The floor sheave is fastened substantially adjacent a side jamb of the door frame between the threshold and the door, and is oriented with the axis of rotation thereof parallel to the axis of rotation of the door. The door sheave is fastened to the door coplanar with the floor sheave so that the axis of rotation of the door sheave is inset medially from and oriented parallel to the axis of the floor sheave. The substantially rigid arm is pivotably mounted at a proximal end on the floor sheave, and at a distal end on the door sheave, and carries at least part of the weight of the door. The cable frictionally engages peripheral grooves in the floor sheave and the door sheave, and extends between peripheral points of the sheaves which are closer to one face of the door than to the other. A coil type spring biases the door toward a normally closed position.

Abstract: The present invention is a torso building exercise machine including the following elements: (a) a stationary base; (b) a horizontally disposed rotatable turntable mounted generally centrally of the base, the turntable having a single degree of freedom about its vertical axis; (c) at least one tank-like compartment for holding an adjustable amount of liquid located near the periphery of the turntable; and (d) an upright stationary stanchion mounted on the base, the stanchion carrying an array of horizontal handholds at various vertical levels and selectively grippable by a person while performing various torso twisting exercises on the turntable.

Abstract: The combination of (a) a multi-hole short golf course, playable with conventional golf clubs, with the length of the holes from tee to green varying from about 60 yards to about 195 yards and with a cup on each green having a diameter of about 8 to 10 inches; and (b) an oversize hollow inflated golf ball with which the short golf course is played. The golf ball comprises: a durable spherical plastic ball having an inflated diameter of 3.0 to 4.0 inches, a wall thickness of 0.170 to 0.220 inch, a weight of 90 to 100 grams, and an air pressurization of 8 to 10 pounds per square inch. The ball has 8 to 10 dimples per square inch in its exterior surface, each of the dimples having a depth of 0.018 to 0.022 inch and a diameter of 0.250 to 0.310 inch. The ball wall is constructed of vinyl polymer, or vinyl copolymer, containing a plasticizer. The ball wall has a hardness of about Shore A 70 Durometer. The ball has an aperture for receiving air under pressure.

Abstract: A chain saw attachment for mounting on a portable power-driven chain saw having a saw bar and an endless saw chain disposed for movement around the saw bar, the chain saw attachment consisting of: (a) a cutting head assembly including a first wheel having a central axial aperture and slots in the perimeter of the wheel for receiving four cutting knives; a second wheel having a central axial aperture and slots in the perimeter of the wheel for receiving four cutting knives; a drive sprocket positioned between the two wheels, the drive sprocket being adapted to receive and be driven by the chain; eight cutting knives, the cutting knives being individually positioned in the slots in the perimeters of the first and second wheels and held in the slots by set screws; and three bolts for holding closely together in a unitary assembly the first and second wheels and the drive sprocket; (b) an axle extending through the central axial apertures of the first and second wheels, the ends of the axle extending normally out

Abstract: A method of forming a structural column wherein a plurality of formed inner and outer column layer halves are integrally constructed from flat sheets of wooden laminate simultaneously bonded together and molded into a triangularly shaped wave pattern.

Abstract: A display sign assembly for temporary vehicular traffic control and the like, having a triangular base member with three triangular side panels each articularly joined as by relatively large snap rings to a respective side of the base member and each preferably bearing a different symbol or message display, the assembly being arrangeable with the side panels on either side of the base member in essentially fixed pyramid-like configurations for selected symbol or message display or in a stacked parallel manner with respect to the base member for ease of transport and storage.

Abstract: The reproduction of one or more target colors on photographic media directly by use of a light source and a selected group of color filters, such as for preparation of a multi-color pre-press color proof, each of the target colors being reproduced by:(a) illuminating the target color with the given light source or equivalent thereof and determining the proportion of the three primary colors which constitute said target color by comparing the target color to a color reference data base comprising a plurality of colors constituted of said primary colors under illumination by a like light source whereby to select from said data base a reference color most similar to the target color and thereby identify a group of one or more color filter elements usable to reproduce the reference color;(b) determining the exposure time of each color filter element required substantially to reproduce the reference color and thus the target color on the color sensitive photographic material when developed;(c) exposing undeveloped

Abstract: Support and discharge apparatus (10) includes a pair of forward legs (20) which are pinned to the forward edge portion of a rectangularly-shaped table (14) and a pair of rear legs (22) pinned to the rear end portion of the table. Legs (20) and (22) are in turn supported by fluid cylinders (24) and (26) which are pivotally connected to the lower end portions of the legs. When cylinders (24) and (26) are retracted, table (14) is supported in horizontal position. Table (14) is tilted forwardly by extending forward cylinders (24) and maintaining rear cylinders (26) retracted. Alternatively, table (14) is tilted rearwardly by extending rear cylinders (26) and maintaining forward cylinders (24) retracted. When rear cylinders (26) are in retracted positions, rear legs (22) are retained against rotation by spaced apart studs (122) which press against the edges of the legs (22).

Abstract: Front and rear shields are telescopically joined together. The front shield carries a power driven rotary cutterhead means. Thrust rams are provided between the two shields for pushing the forward shield forwardly relative to the rear shield while the cutterhead means is being operated to mine the tunnel face, and also to pull the rear shield forwardly relative to the front shield. The rear shield includes a gripper assembly for reacting thrust and torque and a plurality of auxiliary thrust rams which extend rearwardly from the rear shield to react against forward end portions of a tunnel lining which is erected under cover of a tail section of the rear shield. A pair of side placed torque cylinders are interconnected between frame portions of the two shields and serve to transmit counter-rotational torque from the cutterhead support of the front shield back to the rear shield.

Abstract: A frustoconical reflector and socket assembly for halide and like lights especially adapted for promoting growth of plants in a greenhouse environment and the like, the light reflecting surface of the reflector cone being at an angle from about 76.degree. to about 64.degree. and preferably about 68.degree. with respect to the center axis of the cone, and preferably being adjustable as by means of selective interconnection of holes along one radial edge of the cone and selected holes along the other radial edge thereof, and with adjustable counterweight means being provided generally opposite the radially cut edges of the cone to counterbalance the weight of the overlapping segment of the cone for any given selected cone angle.

Abstract: A joist hanger (10) includes a U-shaped seat portion (16) composed of a flat seat base (18) and a pair of seat sidewalls (20) extending upwardly in spaced parallel relationship therefrom to thereby receive the end portion of an I-beam joist (12). Elongate, substantially straight retaining prongs (30) extend downwardly and nominally inwardly from sidewalls (20) to terminate at a pointed tip (52) spaced slightly above joist lower chord (32). Prongs (30) deflect out of the way of lower chord (32) as joist (12) is lowered into seat portion (16) and then resume their nominal diagonal orientation once lower chord (32) has passed by, to overlap chord (32) and thus prevent upward movement of joist (12).

Abstract: A color reference data base and method of making same by preparing colored swatches on photographic media corresponding to a plurality of color points located in the data base working area and placing each such colored swatch at its respective point within the working area, such colored swatches being prepared by selecting a set of up to three colored filters the color constituents of which, when located in the working area, determine a filter triangle such that the color point of the colored swatch or the complement thereof lies within or on the filtered triangle, determining the saturation time for each colored filter for the particular photographic media being used, computing the filter percentage needed for each colored filter, multiplying the saturation time for each colored filter by its respective filter percentage to determine its exposure time, exposing the photographic media through each colored filter for its respective exposure time, and developing the exposed photographic media.

Abstract: A switchable magnetic chuck has a magnet assembly slidably arranged in a casing to magnetize and demagnetize a top plate disposed in an open side of the casing. The top plate is provided with main pole members and auxiliary pole members which are arranged alternatively in the sliding direction of the magnet assembly, separated respectively by a non-magnetic separator disposed between them. To smoothen the change-over operation, enhance magnetic force under the magnetized condition and reduce residual attraction under the demagnetized condition, each main pole member is formed on the side facing the magnet assembly with an extension extending between the auxiliary pole member adjacent thereto and the magnet assembly.

Abstract: Multi-wire group splicing in multi-wire telephone or like distribution systems, utilizing an at least three-sided distribution module (DM), the distribution module (DM) comprising an array of bridging slots (128, 130, 132, 134) in each of its sides (120, 122, 124, 126), and an array of disc type connectors (210 or 230 or 232) for interconnection of the respective prongs (502) of conventional prong type bridging modules (BM or 500) engaging the sides of the distribution module. By use of the distribution module (DM), additional or substitute multi-wire groups can be connected into the distribution system without interruption of service, and field fabrication of splices need involve only the "building" of prong type bridging modules (BM) at the ends of wire group sections of the system, with interconnection of the sections being simply by plugging of the prong type bridging modules (BM) into the distribution module (DM).

Abstract: The coupler portion of a connector assembly for interconnecting vertical columns and horizontal beams includes a rectangularly shaped hollow block member having a vertical row of slots formed along the height of each of its sidewalls. The block member is connectable to the top or bottom of a vertical column or between two abutting vertical columns by a joiner insert composed of a flat flange section and a transverse stud section extending normally outwardly from one side of the flange to engage within a central hole provided in the end wall of the hollow block member. The joiner insert also includes a plug section extending normally outwardly from the flange section in a direction opposite the stud section to engage within a socket formed in the end portion of each column. The connector assembly also includes a T-shaped bracket engageable within a vertical slot formed in each end portion of the horizontal beams.

Abstract: An apparatus is described which is capable of producing an image of a smelt bed of inorganic chemicals collected at the bottom of a kraft pulp recovery boiler. The image produced is free of interferences of fume particles and gaseous radiation which have obscured prior attempts to view hot surfaces under such environmental conditions. The apparatus includes an industrial closed circuit video camera fitted with an infrared imaging detector or vidicon tube. An objective lens obtains the image. An optical filter interposed between the lens and the vidicon is a key element of the invention and is selected to reject radiation less than about a micrometer to avoid fume interference. The filter is further selected to reject all but limited ranges of radiation to avoid gaseous species overlying the smelt bed which are strongly emitting and absorbing. As an example, a spectral filter centered at 1.68 micrometers with a band width of 0.07 micrometer is suitable for imaging a kraft recovery smelt bed.