Abstract: A thermal printer has a plurality of electrodes arranged in a column for applying heat to a resistive ribbon to transfer material from the resistive ribbon to a recording medium. When the electrode is to be energized in the present cycle but was not energized in the previous cycle or either of the contiguous electrodes is not to be energized in the present cycle, additional power is applied to the electrode during a first portion of the present cycle to increase the total power applied to the electrode. This improves the print quality through enhancing the left leading edge and/or either vertical edge of the character. During a second portion of the cycle, power is applied for the same period of time to all of the electrodes, which are to be activated, during the particular cycle.

Abstract: A robot arm has a tool connected thereto through a coupling apparatus including an inner assembly attached to the robot arm and an outer assembly attached to the tool. When the inner assembly has its outer surface mating with an inner surface of the outer assembly, a piston in the inner assembly is pneumatically moved to lock the inner and outer assemblies to each other. The piston movement causes radial movement of balls, which are mounted in a retainer of the inner assembly, away from the piston so that the balls will be retained beneath a cam locking ring of the outer assembly whereby the inner and outer assemblies remain locked when the pneumatic pressure is removed. The outer surface of the outer assembly has a mounting plate for attachment to the tool to be connected to the robot arm.

Abstract: A pulled dethatching unit includes a frame having a tow bar extending forwardly for attachment to a draw bar of a pulling vehicle. The rear end of the frame has an arm pivotally attached to each side with each arm having a wheel rotatably mounted thereon. The two wheels and the tow bar cooperate so that tines, which are mounted in two rows on the frame for independent movement, do not carry any of the weight of the unit so that the bottom tip of each of the tines is slightly spaced from the ground in its rest position. Each of the tines in each of the rows is offset from each of the tines in the other row. Forward motion of the dethatching unit causes the bottom tip of each of the tines to deflect rearwardly and downwardly as it comes in contact with grass. In their deflected positions, the bottom tips of the tines contact the thatched layer to tear it loose from the soil and alternately flip the thatched layer to fall on the ground.

Abstract: An actual pressure of a fluid having an ambient pressure as part thereof is sensed by a sensor. When the actual pressure decreases below a predetermined pressure, a signal is produced. If desired, the sensor may cause production of the signal when the actual pressure of the fluid exceeds a predetermined pressure.

Abstract: A thermal printer (10) has a thermal transfer medium (28) fed past a thermal printhead (21) at a substantially constant velocity by a feed roll (82) engaging the thermal transfer medium just prior to the printhead to maintain a portion of the thermal transfer medium between the printhead and the feed roll relatively stiff. The feed roll is mounted on a cartridge (30) having the thermal transfer medium supplied therefrom. A drag brake (70) is disposed in the feed path of the thermal transfer medium prior to the feed roll to cause a substantially constant premetering tension to be applied to the thermal transfer medium irrespective of the coefficient of friction between the drag brake and the thermal transfer medium. A carrier (14), which supports the printhead and a feed roll driver (90), is driven separately from the feed roll driver so that various ratios between the velocities of the thermal transfer medium and the carrier are obtained to produce various print qualities.

Abstract: A J-clip is inserted by a tool into a hole in a portion of an element in a single plane or a hole at the intersection of two substantially perpendicular portions of an element so that portions of the clip are on opposite sides of the portion of the element having the hole. The tool has a hook disposed in a hole in the single plane portion when the clip is to be inserted into the hole and guide surfaces engaging the single plane portion cooperating with the hook to orient the tool relative to the single plane portion. The tool has a pair of locater fingers for disposition within the hole at the intersection of the two substantially perpendicular portions of the element when a clip is to be inserted therein and toes engaging the intersection of the two substantially perpendicular portions of the element cooperating with the locater fingers to orient the tool relative to the two substantially perpendicular portions of the element.

Abstract: A gravity spreader includes a hopper having openings in its bottom through which material flows when a shutter is not in a closed position with the position of the shutter determining the rate of flow of material. A fluted roller allows the material to flow from the hopper to the ground only when the hopper is moving in a forward direction. The fluted roller does not rotate when the hopper is stopped or when the hopper moves in a reverse direction so that the material does not flow to the ground irrespective of the open position of the shutter.

Abstract: A hay bale handling apparatus has a screw spear, which is rotatably supported by a frame, advanced into a round hay bale by a hydraulic motor, which is mounted on the frame, rotating the spear as a vehicle, which may be a tractor, for example, having a front loader, a backhoe, or a farm loader attached thereto, for example, supporting the frame is advanced. The frame has a bearing rack supported thereon with spaced picks of relatively short length engaging portions of the bale to provide stability to the bale when the screw spear has been advanced into the center of the bale. Three screw spears of the same length may be employed instead of the single screw spear with the spears being rotated in the same direction through a sprocket and chain arrangement with one of the sprockets attached to an output shaft of the hydraulic motor. This arrangement also may use the bearing rack.

Abstract: A cart includes a support body having two separate portions. Each of the separate portions has a bottom wall with a side wall extending upwardly from one side thereof and a flange extending downwardly from the other side thereof. The flanges of the two separate portions abut each other and are held in this position by tabs on one of the flanges being disposed within slots in the other flange. A front end wall is fixed to the two separate portions. A rear end wall is removably connected to the two separate portions. The side wall of each of the two separate portions has an axle support plate attached thereto and supporting an axle for a wheel. A torque tube extends between the two plates to prevent twisting and add rigidity to the assembled cart. A tow bar, which is connected to a vehicle for towing or pulling the cart, is attached to the bottom walls of the two separate portions and has a longitudinal slot therein to receive the abutting flanges.

Abstract: A hand held and hand operated device is capable of pumping or siphoning a liquid. The device includes a pair of telescoping hollow tubes having a single longitudinal axis with a seal therebetween that is maintained when one of the tubes is reciprocated relative to the other. Each of the tubes has a conical valve seat at its distal end with each conical valve seat having the same selected angle to the single longitudinal axis of the tubes. Each seat has a separate stainless steel ball to seal on the seat whenever the longitudinal axis of the tubes is at a greater angle to the horizontal than the selected angle of each conical seat to the longitudinal axis. In this position, reciprocation of the tubes causes pumping of the liquid through alternatively removing each of the balls from its seat due to pressure differentials created by changing the volume within the tubes between the balls.

Abstract: A fishing lure of the spinner bait type has a substantially rigid arm having a hook adjacent one end thereof with a lead weight on the substantially rigid arm adjacent its connection to the hook. The substantially rigid arm has a loop formed adjacent its other end to enable a fishing line to be attached thereto. One end of a non-rigid arm is connected to the other end of the substantially rigid arm with the arms diverging from each other and in the same vertical plane when the fishing lure is pulled through the water. The other end of the non-rigid arm has a spinner blade rotatably connected thereto. The non-rigid arm is movable relative to the substantially rigid arm to prevent rotation of the fishing lure when it is pulled through the water due to a torque produced by the spinner blade.

Abstract: A sensing frame is positioned so that a basketball will pass through a rectangular shaped opening in the sensing frame when a free throw shooter shoots the basketball towards a goal. The sensing frame has a beam of light directed across it above the top of the desired path of the basketball for the basketball to enter the goal and a second beam of light directed across it below the desired path of the basketball to enter the goal. If either of these beams of light is broken, different alarm signals indicate to the shooter whether the path of the basketball is high or low. The sensing frame is adjustable both vertically and about a horizontal axis to enable the desired positioning of the sensing frame relative to the shooter.

Abstract: A strip of material is advanced a first selected distance along a feed path past a cutter. Then, the free end of the strip of material is gripped by a gripper and pulled a second selected distance so that the strip of material is disposed across a path of a reciprocating frame. The frame is advanced so that a retainer holds the portion of the strip of material to be cut at the time that it is cut by the cutter. The ends of the cut segment, which is held by the retainer, are folded by two pairs of folding pins supported by the frame to form a folded loop. The folded loop is advanced to a sewing machine, when a sewing machine operator activates a switch, to position the folded loop on a sewing plate with the frame being retracted after the folded loop is clamped to the sewing plate and prior to sewing. The movements of the frame and the gripper are controlled from a single driven cam shaft having three cams thereon with one having a plurality of cam profiles.

Abstract: A cut segment of a strip of material is clamped intermediate its ends, prior to being cut, by two separate clamping elements. In one embodiment, one of the clamping elements is cammed towards the other clamping element as the clamping elements are moved to position the cut segment at a position for attachment to other material by a sewing machine, for example. This forms a loop or slack portion between the clamped portions of the cut segment so that attachment of the free ends of the cut segment produces a large loop when each end of the cut segment is attached to the other material. In another embodiment, one of the ends of the cut segment may be folded to form an overlapped portion for attachment to the other material so that a double thickness of the cut segment is attached to the other material. This embodiment still has one of the separate clamping elements movable towards the other to form a loop or slack portion between the clamped portions of the cut segment.

Abstract: A substantially flat plate is positioned on a rim, which has a large central opening and no lug holes, to enable a tire to be mounted thereon or dismounted therefrom by a tire changer requiring a rim to have lug holes around the central opening to hold the rim. The flat plate has its length selected so that its opposite ends rest on an annular portion of the rim. The opposite ends of the flat plate have substantially the same curve as the annular portion of the rim on which they rest. The flat plate has a central circular opening to receive a threaded shaft of the tire changer supporting the rim. A hollow tube extends downwardly from the bottom surface of the flat plate adjacent the central opening for disposition over a positioning pin of the tire changer on which the rim is supported.