Abstract: A satellite antenna particularly adapted for use on a recreational vehicle such as a house trailer or mobile home, having a roof surface, the antenna including a base plate mounted on the vehicle roof surface, a support plate rotatably secured to the base plate and rotatable about a generally vertical axis for at least about 360 degrees, a parabolic satellite signal reflector having a focal axis, the reflector being pivotally secured to the support member, a variable length member, such as a screw type cylinder for selectively pivoting the parabolic reflector relative to the support member, and a feed arm pivotally secured to one end to the parabolic reflector, a signal receiving feed horn mounted on the other end of the feed arm, the feed arm being pivotal to a position wherein the feed horn is coincident with the focus apex of the reflector and to a rest position in which the feed horn is retained within the confines of the reflector interior surface and linkage means to automatically pivot the feed arm to

Abstract: A heat exchanger for exchanging the heat between separate fluids has a plurality of heat exchange tubes. These tubes are alternatively divisible into a primary plurality and into an alternative plurality of mutually exclusive subsets. Each one of the primary subsets shares in common with any one of the alternative subsets, one of the tubes. The heat exchanger also has first and second tube sheets each having a plurality of tube holes. Each of the heat exchange tubes are mounted between the first and second tube sheets. Each end of each tube is sealed into a corresponding one of the tube holes. The first and second tube sheets each have a plurality of internal, isolated passageways. Each of these passageways in the first and second tube sheets communicate with the surfaces of the tubes in a different associated one of the primary and alternative subsets, respectively.

Abstract: The feeder house of a self-propelled combine harvester carries a front-mounted gatherer which delivers crop material to a forward inlet of the feeder house which is pivotally supported by the combine separator body, and delivers crop material to an inlet of the separator. A pair of side-by-side, contra-rotating auger conveyors deliver crop material directly to the separator rotor in a relatively concentrated high-speed stream. Convergence and concentration of the harvested crop material begun by a grain platform auger is continued by a pair of transverse beaters, each including helical conveying elements, arranged in tandem ahead of and partially above the dual auger conveyors. A forward beater close to the feeder house inlet receives material directly from the platform auger and conveys it rearwardly over a floor somewhat elevated with respect to the auger conveyors and transfers it to a second beater above the forward end of the dual augers which directs it downwards into the auger conveyors.

Abstract: A motor and a propeller for a canoe are mounted to be manually positioned either within a box over an opening through the bottom of the canoe or, for operation, below both the box and the hull of the canoe. The motor is connected to the box by a usual control shaft, the control shaft extending upwardly through a supporting member and a cover of the box. Resilient grommets about the shaft and polyethylene foam insulation of the supporting member dampen noise and vibration. The supporting member moves either upwardly or downwardly with the motor and in a downward position closes the bottom of the box to prevent eddy currents within the box.

Abstract: In a rotary separator, cylindrical threshing, frusto-conical separating, and centrifugal fan sections are arranged coaxially and in tandem. A fixed grate including threshing and separating portions surrounds and generally conforms to a rotor profile. A frusto-conical collector housing encloses the forward part of the separator and feeds threshed and separated grain to a grain cleaning unit, the screen elements of which, along with the collector housing, rotate concentricaly with the grate while at the same time reciprocating axially. A stationary cylindrical housing surrounds the cleaner unit and clean grain and tailings pass centrifugally from the cleaner screens to separate annular channels, to be swept around the inside of the housing by paddles moving with the cleaner elements to tangential discharge points near the top of the separator for transfer to clean grain and tailings return augers respectively.

Abstract: The rotor of an axial flow rotary separator carries a series of circumferentially spaced threshing bars which move in a threshing relationship with a cylindrical threshing grate as the rotor rotates and are characterized in having upstream and downstream portions, respectively providing greater and lesser grate clearances, the greater clearance of the upstream portion facilitating the entry of material into the threshing section of the separator.

Abstract: The rotor of an axial flow rotary combine separator includes contiguous upstream threshing and downstream separating portions in each of which circumferentially spaced axially extending processing bars (threshing and separating respectively) are mounted. Between adjacent processing bars are mounted axially extending mover bars whose configuration differs substantially from that of the processing bars and whose primary function is to maintain uniform axial indexing of crop material through the separator as the rotor rotates and the material is processed.

Abstract: A combine has a feeding system, for conveying crop material from a harvesting unit to the infeed rotor of a longitudinal axial flow rotary crop processing unit, including a feeder house employing a pair of augers, mounted side by side in an enclosed housing, and contrarotating at a relatively high speed. The augers are cantilevered from a bulkhead at the inlet end of the feeder house and do not make contact with the housing. The housing cross section does not conform to the cylindrical surfaces swept by the augers and there is also space between the augers themselves so that heterogeneous material can be conveyed within the housing on all sides of the augers. Housing shape and clearances are designed so that there is a minimum of dead space in the housing and, with some assistance from fixed strippers, mounted inside the housing parallel to the axes of the augers, material is conveyed generally linearly at a speed nearly equal to the equivalent axial speed of the auger flighting.