Showing papers on "Paddle published in 1982"

Bit guidance device and method

Abstract: The invention disclosed herein provides a mechanism and method for positive drill bit guidance during well drilling operations. The guidance device includes a control arm or paddle which, due to hydraulic pressure, pivots to steer the drill bit towards its target area. As the paddle applies pressure to the wall of the well, the drill bit is then turned from the contacted area of the well wall in the desired direction.

Collapsible paddle boat

Abstract: A paddle boat comprising a plurality of floats, collapsible driving and propelling apparatus, folding steering apparatus, the driving and propelling apparatus and steering apparatus adapted for mounting onto the floats during use of the paddle boat, particularly wherein the driving and propelling apparatus includes a paddle adapted to remain in a substantially vertical orientation during movement of the boat. Preferably, the driving and propelling apparatus comprises a stationary base element foldably mounted onto the main frame and defining a first rotation axis, a crank shaft defining at least one arm and an axle portion rotatably mounted onto the stationary base for rotation about the first rotation axis, a stationary extension element foldably mounted onto the base element and defining a second rotation axis parallel to and spaced from the first rotation axis, a paddle mounted upon each of the arms, at least one rod rotatably mounted onto the extension element and arranged for rotation about the second rotation axis through a restricted arc, and a member slideable relative to each rod and fixedly mounted onto each of the arms, whereby rotation of the arms about the first rotation axis causes the member to move slideably with relation to the rod and cause its rotation about the second rotation axis, the paddle being adapted for movement along the length of the rod as it rotates through the restricted arc such that the paddle remains in a substantially vertical orientation throughout its movement.

Video game controller

Abstract: A player-operated control unit for a video game providing both a joystick control function and a paddle type control function. A combined joystick/paddle control assembly (25) has radially extending arms (69-72) each associated to a different joystick control switch (34-37) mounted on a substrate (27) in a housing (28, 29). The assembly also includes a rotatable potentiometer having a shaft extending through the top of the housing on which a control knob (86) is mounted. The assembly (25) is pivotally mounted on a support post (88) located on the inside bottom surface of the housing, and rotational motion of the assembly (25) is confined by the interlocking action of a pair of ribs (79) formed in the housing and slotted feet (76, 77) extending laterally of the bottom of the assembly. A pair of game status switches (31, 33) and an fire/ serve switch (32) are mounted on a substrate (27) and are operated respectively by a status switch operating assembly (22, 23) and a spring loaded fire/serve button (24).

Paddle wheel feeder with normal force optimization and blade control

Abstract: A paddle wheel feeder includes a paddle wheel having a foam hub with at least three blades molded therein. The paddle wheel is mounted to be rotatably driven by a shaft having a Geneva mechanism attached thereto which causes the paddle wheel to stop just before one of the blades contacts the top sheet in a stack and then accelerate to drive the sheet forward. For normal force optimization, internal springs are located inside each paddle of the wheel is one embodiment and a thick bladed foam paddle wheel is utilized in another embodiment with each blade having a coating of high friction material.

Paddle retard feeder

Abstract: A friction retard feeder adapted to feed sheets from a stack into a paper path located in a horizontal plane includes a tray which holds a stack of sheets at an angle of between 15° and 20° with respect to the paper path. A paddle wheel having a plurality of blades is positioned a predetermined distance in front of sheets stacked in the tray so that as the paddle wheel is rotated the blades in a first position strike the top sheet in the stack in a plane parallel to the top of the stack and separates it from the remaining sheets in the stack. Continued rotation of the paddle wheel causes the blades to deflect downward in front of the stack and thereby inhibit movement of sheets other than the top sheet from the stack. The tray also includes a high friction surfaced pad that cooperates with the paddle wheel in order to enhance the feeding of sheets near the bottom of the tray.

Device for driving paddle ship

Abstract: PURPOSE:To improve the total thermal efficiency of an internal combustion engine by recovering a part of exhaust gas energy as a motive power. CONSTITUTION:The motive power of an internal combustion engine 1 rotates and drives paddle wheel 8 through its driving shaft systems 2 through 7. On the other hand, exhaust gas generated by the internal combustion engine 1 is led to an exhaust gas boiler via an exhaust gas conduit pipe 10, and generates steam by the heat retained. Then, the exhaust gas is discharged to the atmosphere through a chimney 12. Steam generated in an exhaust gas boiler 11 operates a steam engine 14, and generated energy is transmitted to a crank mechanism 15 through a driving shaft 14a to rotate and drive the paddle wheel 8 by means of paddle wheel driving shaft 16. Steam discharged from the steam engine is discharged into the chimney 12 to promote the drafting effect of the chimney.

A Biomechanical Analysis of the Effects of Two Paddle Types On Performance in North American Canoe Racing

Abstract: Five highly skilled canoe racers performed three trials each at race pace using a conventional straight canoe paddle and a modified paddle with the blade angled 15 degrees forward from the shaft. The use of the straight paddle resulted in a mean velocity of 290 cm/sec whereas the angled paddle resulted in a significantly faster mean velocity of 306 cm/sec (p<.05). There were no differences in the temporal sequences of the boat velocities. There were no significant differences in the time the paddles were in the air between strokes. It was also determined that the angled paddle had less absolute movement in the water than the straight paddle during the period of greatest boat acceleration. No significant differences were found in paddling technique through absolute measurement and temporal sequence of horizontal displacement of either hand relative to its corresponding shoulder, either shoulder relative to the spine, or the spine relative to the boat.

Concrete mixer delivery vehicle

Abstract: A vehicle of the type adapted to contain a load of concrete mixture to be driven by the buyer himself to the desired destination where he wants to pour concrete. This concrete mixer delivery vehicle is characterized by its effortless unloading and by its paddle assembly that produces such unloading without having to tilt the tank to empty it. The tank is fixedly mounted and includes a loading opening at the top and an unloading door in the lowest portion of one end wall. The paddle assembly is readily removable through the loading top opening and includes rows of blades with radially outermost blades arranged to wipe against all of the inner bottom surface of the tank and angularly set to axially move the concrete mixture and unload it through the unloading door in the end wall.

Variable geometry paddle propulsion system - has single drive to central wheel linked to paddle mountings by gear trains

Abstract: The paddles are symmetrical and can be set in either direction. They are mounted on rotating supports and describe one revolution for every revolution of the main wheel. Two or more paddles are mounted on the main wheel and are linked to a central drive wheel by gear trains. A single belt drive drives the central wheel. The paddle drive operates in water or air, with parallel drives powered by a single linking shaft. The drag factor of the return stroke is minimised and the power factor is greater than for fixed wheels of the same size.

Cutter for slot wedges

Abstract: Slot wedges are cut from lengths of wedge stock having a generally U-shaped transverse cross-section by air-operated shearing means triggered when an end of the wedge stock contacts a paddle mounted with a paddle-operated electrical switch on a slide assembly movable longitudinally along the path of feed of wedge stock past the shearing means. The shearing means comprises a movable blade having an external symmetrical U-shaped cutting edge cooperating with a fixed blade having an internal symmetrical U-shaped cutting edge with a rounded end and straight, parallel sides. A guide dial with multiple selectable apertures is used to center the wedge stock on the shearing means. The guide dial is aided by an upward protrusion which projects between the legs of the wedge stock cross-section to keep the wedge stock perpendicular to the cutting plane. The movable blade is constantly urged against the fixed blade by a spring-loaded ball bearing, and is actuated by an air cylinder piston having a flat surface transverse to the direction of blade movement so that the blade is permitted to move laterally as wear takes place. The paddle pre-stresses the paddle-operated switch so that only a very slight movement of the wedge stock is needed to trigger the shearing means. The slidable switch and paddle assembly carries with it an overhanging shield which prevents the cut wedges from flying upwardly regardless of their size.

Production of polyacetal polymer

Abstract: PURPOSE:To produce the titled fine-particle size polymer efficiently at high conversions, by feeding trioxane and ethylene oxide or 1,3-dioxolane to a specified reaction apparatus and reacting them under specified conditions CONSTITUTION:A reaction apparatus comprises two shafts 2 and 2' disposed within cylindrical cases 1 and 1' provided with a jacket 4 Each of these shafts has a paddle 3 or 3' having a cross-section of an arcuated pseudotriangle Said two shafts are disposed such that one paddle rotates while the apexes of the paddle are always in contact with the inside of the case or with another paddle, with a slight clearance therebetween Next, from the inlet 5 of this reaction apparatus, a material mixture containing trioxane and ethylene oxide or 1,3- dioxolane is fed by the shafts 2 and 2' rotating in the same direction By this rotation, the reaction mixture is transferred and polymerized and at the same time the formed polymer is finely divided From the discharge port 6, a polymer of 81-94% rate of conversion and <=2% weight loss when heated in vacuum at 222 degC for 50min, is discharged

An Electrohydraulic System for a Programmable Wave Generator

Abstract: The paper describes the features, control, and performance of a 130 kW electrohydraulic wave-making system installed in a 4m deep x 2.2m wide x 50m long wave tank which is being used for offshore structure dynamics research. The system is expected to induce at the tank's working section waves of required size, shape, frequency, and spectra, via computer-control of a large three-stage electrohydraulic servovalve which controls the actuator driving a large pivoted paddle. The paper refers to the overall requirements of the facility and the overall wave-making system strategy. It provides some detail of the loaded electrohydraulic drive and its control, presenting a dynamic model of the paddle and drive system derived via bond graphs. It gives results of a digital simulation of the model operating in open-loop mode and refers to closed-loop simulation results, and to closed-loop experimental results obtained under local signal generator control.

Canoe paddle with glass fibre reinforced handle and blades - to save wt. compared with timber paddles

Abstract: A paddle is made with a handle of resin impregnated glass fibres preferentially oriented along the handle, the handle being fitted with a composite blade of resin impregnated glass fibre cloth or mat enclosing a core of cellular material. Double bladed paddles for canoeing may be made by splicing two such single-ended paddles together, using a combination of resin and overwound glass fibre tape. Pref. the blade profile cores are of polyurethane enclosed between tailor cut panels of glass fabric. Lighter than corresponding paddles with a timber shaft and blades, e.g. 800g instead of about 1400g for a timber paddle of similar stiffness.

Paddle and table ball game and method of playing

Abstract: A paddle and ball game, having some similarities to "Ping Pong", including a relatively small playing area surface (50) with a rigid divider (14, 103) located at its mid-line serving as a rebounding "net". The table top (17, 101) can be supported at different vertical levels, providing for example three levels of play - a standing level (Fig. 8A); an intermediate, seated, chair level (Figs. 5 & 8B); and a floor level (Fig. 8C) for play while seated on the floor. Hand-held paddles (20, 22) are used to propel a plastic ball (24) from side-to-side by the players.

Method and appliance for mixing liquids

Abstract: The invention proposes both a method for mixing viscous, particularly highly viscous liquids, and a mobile container for implementing such a method. The invention works with a reversible mixing paddle, which can be made to oscillate, preferably actuated by compressed air, about a pivot situated outside the paddle.

Barge-mounted energy conversion appts. - converts water flow kinetic energy into electrical energy using paddle wheels

Abstract: The appts. converts the energy of the flow of water into potential energy by pumping it, e.g. for irrigation, or into electrical energy, using direct or indirect conversion systems. It carries several large paddle wheels in rows. The vessel has an open deck allowing the transverse mounting of a number of rotating wheels on axles and drums. These are turned by the flowing water via turbine buckets and side plates. The wheels carry large gear rings for the transmission of the energy of their rotation and tyres allowing the ship to be moved on land and in shallow water. The ship is anchored by the bow so that it cannot move in the direction of the flow of water.