Abstract: The temperature of a serviced area or zone is cost efficiently maintained within a prescribed range by establishing a prescribed fan cycle period, during which period the fan is both operative and non-operative at variable intervals. The temperature of the serviced area is monitored and averaged for each given cycle. The fan run time is then determined by a CPU for the succeeding cycle dependent upon the difference between the average measured temperature and a prescribed balance temperature.

Abstract: A linking mechanism for irrigation/aspiration machines which includes a coupling member having a plug that is inserted into an opening in a receptacle on the face of the I/A machine. The plug projection is sealed in air tight relation to the wall surrounding the opening and an auxiliary prong(s) prevent rotation of the plug as well as lock the plug in the receptacle. The receptacle includes an arming switch activated responsive to proper seating of the plug in the receptacle to arm the peristaltic pump that is subsequently operated by a foot switch to generate a vacuum in the aspirant line.

Abstract: A transducer formed of one or more electrode arrays is positioned in confronting relation and parallel to the plane of rotation of one or more rotating members. A plurality of phase modulated, two-phase, square wave drive signals of the same amplitude and frequency are applied to each electrode. The signals are combined at a central node or electrode to form, as a result of the signal, the superposition of the algebraic sum of all drive signal pairs. Samples of the resultant signal taken at the same frequency and of a duration of less than one-half the duration of the drive signal period provide a multi-step, synchronously detected signal. The detected signal is a multi-step approximation to a sine wave, the phase angle thereof relative to a timing point being proportional to the angular position of the rotating member.

Abstract: A three channel, binary coding technique, especially adapted for identifying intermittently, erratically, or continuously moving objects along a linear path (conveyor track, roadway, or the like). Three parallel channels of coded information are each provided with some type of photoelectric, electronic, or mechanical indicating means or indicia representative of one of two logic states, which logic states on each channel change during each successive segment or interval thereon. A change in the timing channel indicates to a sensing means that a new binary bit of intelligence is to be transmitted. The order in which the coding channels change during the succeeding segment then indicate whether the binary bit being generated is a ONE, a ZERO, or in the alternative whether the reading is erroneous or invalid.

Abstract: A transducer formed of one or more electrode arrays is positioned in confronting relation and parallel to the plane of rotation of one or more rotating members. A plurality of phase modulated, two-phase, square wave drive signals of the same amplitude and frequency are applied to each electrode. The signals are combined at a central node or electrode to form, as a result of the signal, the superposition of the algebraic sum of all drive signal pairs. Samples of the resultant signal taken at the same frequency and of a duration of less than one-half the duration of the drive signal period provide a multi-step, synchronously detected signal. The detected signal is a multi-step approximation to a sine wave, the phase angle thereof relative to a timing point being proportional to the angular position of the rotating member.

Abstract: A multi-step process for making an oil and vinegar salad dressing wherein the ingredients are blended and incorporated into each other by means of a carefully controlled application of heating, cooling and resting steps with agitation. The resulting product demonstrates increased shelf stability and a significantly improved flavor.

Abstract: A prefabricated fireplace structure is convertible to function as an open fireplace or an enclosed, solid fuel burning stove. An outer fireproof cabinet for installation in existing building framing or new construction, receives a selected compatible firebox in the form of a log-burning fireplace or a substantially enclosed wood/coal-burning stove. The selected firebox includes a damper and an exhaust outlet therein, which exhaust outlet is connected to a flue pipe in the outer cabinet. A unique connecting device secures the selected firebox in the cabinet and further includes a means for sealing the connection of the exhaust outlet to the flue pipe inlet.

Abstract: An assembly including a clasp member having a pair of opposing upper and lower gripping jaws which receive selected portions of sheets therein; and a wedge member for insertion between the inner surface of said gripping jaws along with the bedsheets for locking the sheets between the clasp member and the wedge member. The preferred wedge has a triangular cross-section and being of a size somewhat smaller than the space between the opposed gripping jaws, to provide some clearance when the wedge is inserted between the gripping jaws. When tension is applied to the sheets the wedge member is caused to rotate and wedge the edges thereof against the inner surfaces of the gripping jaws to more tightly grip and retain the sheets in position.

Abstract: A blade setting tool for wood jointer/planer machines includes a jig member which is attached to the horizontal worktable of the machine and which supports a pair of vertically displaceable knife stops which are positioned in the path of rotation of the knife blades. The underside of a portion of the jig is utilized as a gauging surface for balancing the blades. The blade stops are pulled up and out of the path of blade rotation after a blade is balanced, thus permitting subsequent blades to rotate into place for balancing.

Abstract: A water guard for removably installing along the floor track of sliding patio-type doors includes a panel member depending vertically upwardly from the door track a distance of approximately three inches. The panel member is attached to the indoor side of the sliding door track and is supported thereon by way of a resilient, inverted U-shaped clamping mechanism. The water guard is selectively installed in the door track during periods of inclement weather conditions to prevent flow of water underneath the door and into the room.

Abstract: The container or casing of a storage battery for automobiles and the like is so constructed as to be universally compatible for use with various types of securing mechanisms. Positive and negative terminals are provided on both the top and on one of the side walls. The battery may be secured by a peripheral frame which engages the periphery of the top wall, a central bail which overlies the medial portion of the top wall, or lower opposed clips which engage and clamp onto ledges on opposed side walls or opposed end walls. The top wall and bottom wall are so constructed as to nest to the adjacent housing in a stack when stored or displayed, and a space between adjacent housings allows visual inspection of a color coded handle. In addition, a unique vent cover construction elevates the wells surrounding the vent openings to maximize the vertical dimension of the plates therebeneath.

Abstract: A coal-tar emulsion seal coat is applied atop, spread, and pressed into an asphalt pavement by a continuous rolling technique whereby liquid sealant is carried by and released from a delivery tank extending between the sides of a frame onto the asphalt surface. A first and second set of rollers extending between the frame sides spread and smooth an even pattern of sealant, then a third, smaller, lighter roller provides a finishing and touch-up operation.

Abstract: Personnel and their garments are grounded through a uniquely designed, common body/garment strap which includes:an elastic closed loop fabric member having an elastic tab extending therefrom;conductive yarns in both the closed loop member and its extension;the elastic extension or tab electrically connected to the garment; andthe closed loop member connected to ground.Thus, both the garment and operator are grounded, while the elastic conductive tab allows freedom of movement of the garment with respect to the operator's body.

Abstract: The side edges and return end of an endless belt conveyor are sealed to prevent particulate material deposited thereon from leaking off the sides and being lost, or worse, from working its way beneath the belt, onto the slide pan, and into the pulleys and end rollers. The front or discharge end in a preferred embodiment is also provided with an air seal to prevent occurrence of the same problems there. The top of the conveyor is covered with a hood.

Abstract: An improved, ventilated roof construction for flat roof installations substantially decreases damage caused by roof leaks that allow water to settle into the roofing substratum and insulation. A grid or perforated plate is supported in spaced arrangement above the underlying roofing support deck and immediately beneath the exterior roofing surface to define an air passageway or air duct therein. The grid allows evaporation of moisture from the insulation layer therethrough as air circulates thereunder. A plurality of conduits leading from the grid to the exterior roofing surface provide means for vacuuming accumulated water from the interior roofing structure to avoid damage thereto, or to pump water into the interior roofing structure to extinguish fires.

Abstract: A lip extends along the free side of the base of a protractor for suspending the protractor upside down from a guide cord. A freely hanging weight or "plumb bob" is suspended from the center point between the protractor base lines. When the plumb bob points to a predetermined angle on the protractor scale, the guide cord will be laid out along the same desired angle from the horizontal.

Abstract: A tree stand having a platform and a folding seat member includes a platform supporting frame and brace which engage the tree on which the stand is mounted. The brace and an undergirding pivotally mounted strut include a plurality of unique, triangularly shaped spikes which pierce the bark of the tree. The triangular spikes have flat upper and lower surfaces which join and form a sharp point for piercing the tree. The upper surface enters the tree perpendicularly thereto and the lower surface at an angle acute to the upper surface. When weight is placed on the forward portion of the load bearing platform, the acute angle of the lower surface of the spike is caused to cut deeper into the tree and thus improve stability of the stand.