Showing papers on "Paddle published in 1989"

Apparatus and process for positioning wafers in receiving devices

Abstract: An apparatus is provided for loading and/or unloading wafers from a holding cassette to a quartz boat without scraping the wafer on the slots contained in the quartz boat; the apparatus comprising a robot and a paddle. The improvement resides in the main feature of wafer sensor means disposed on the surface of the paddle, the wafer sensor means being connected to a microprocessor which converts and digitizes an analog signal from the wafer sensor means, the analog signal indicating the position of a wafer disposed on the surface of the paddle. Further included is an arrangement for signaling the robot to compensate for the particular position of the wafer on the paddle by adjusting the position of the paddle with respect to the quartz boat. Another feature lies in the fact that sensing notches are disposed along the front, right-side and left-side edges of said paddle, each of the sensing notches having a sensor device and associated emitter means disposed on opposite sides of the sensing notches in such a manner as to permit detection of the position of the slots in the quartz boat stacking rods lying adjacent to respective sensing notches.

Wave powered apparatus for generating electric power

Abstract: A wave powered generator incorporating a plurality of paddle and hydraulic cylinder units. Each paddle and hydraulic cylinder unit has a paddle in the path of waves and is pivotally supported to reciprocate and operate a hydraulic pump. Each hydraulic pump discharges into an accumulator that in turn delivers fluid to an electric generator station. The accumulator automatically accommodates variations in flow rate from the hydraulic cylinder. There are provisions for accommodating variations in the height and velocity of waves, of changes in the period of the waves, and of changes in the level of the sea.

Mammography compression paddle

Abstract: The present invention provides a mammographic compression technique which permits the paddle to be aligned in any angular view with the cutout portion of the paddle positioned over the implant to reduce the amount of compression of the implant thereby lessening the blockage of the breast tissue. The invention comprises a compression paddle formed of x-ray transmissive material having sidewalls extending normally from a planar bottom surrounding the periphery which lays outside of the cutout portion.

Paddle handle latch

Abstract: A paddle handle latch includes a frame which defines a recess, and a peripheral handle which is mounted for pivotal movement in the recess A retainer is mounted to the frame to define a channel having a latching axis and this retainer is shaped to receive a striker moving along the latching axis and to retain the striker against movement transverse to the latching axis A catch is pivotably mounted in the retainer to move between an open position and a closed position A linkage interconnects the paddle handle and the catch such that the paddle handle operates to move the catch between the open and closed positions

Rotary machine with non-positive displacement usable as a pump, compressor, propulsor, generator or drive turbine

Abstract: A rotary machine, having non-positive, displacement, which can be used as a pump, compressor, generator or drive turbine wherein the rotor is form by a particular combination of paddles and blades which improves fluid flow through the rotary machine. The paddle and blade configuration of the rotor utilizes the Archimedes screw principal to enhance the fluid flow characteristics and resist cavitation in the rotor chamber.

Paddle mixer for asphalt pavers

Abstract: A revolving paddle mixer for re-mixing a hot asphalt mix deposited in the hopper of a road paving machine The mixer takes the form of a plurality of paddles angularly positioned relative to each other and mounted on a revolving shaft adjacent to the conveyor for transporting the asphalt mix material to the rotating auger The resultant re-mixture is more uniform and dense so that a smooth pavement is laid on the roadway

Foot-operated boat paddle propulsion system

Abstract: A boat-mounted pedal-driven paddle system for maneuvering a lightweight fishing boat. When employed for movement, a paddle is vertically oriented with its blade parallel to the keel of the boat and removably mounted upon the transom by a manually adjustable C-clamp. A pair of cooperating foot pedals are permanently, pivotally mounted upon a crossbar which transverses the width of the boat and is connected between the boat sides. The foot pedals are operatively linked to the paddle system via a pair of flexible cables guided upon a multiplicity of cooperative pulleys and connected to the pedals via a pivotal cable guide donut. Paddle movement involves three basic motions. First, the paddle is rotatable a limited degree about its longitudinal axis, and the position to which it axially rotates determines blade operative pitch during propulsion. Second, the paddle swings in an arc of roughly 180 degrees, which arc lies in a plane generally parallel with and spaced apart from the boat transom to propel the boat in a direction predetermined by the previously established blade pitch. Third, in response, for example, to underwater obstacles, the paddle may be deflected in an arc occupying a plane generally perpendicular to the transom, and generally coplanar with the longitudinal axis of the boat. The paddle may thus assume a generally horizontal, inclined position well above the surface of the water and be suspended in an out-of-the way position for travel or storage.

Effects of cardiac configuration, paddle placement and paddle size on defibrillation current distribution: a finite-element model

Abstract: The present rationale for clinical defibrillation is empirically based, and the technique is the same for different paddle locations and anatomical configurations. Using a two-dimensional finite element model, we studied the effects of such variations on the distribution of myocardial current during defibrillation, and developed a method to quantitatively assess the potential for a defibrillating shock to cause myocardial damage. We used this method to compare five paddle placements, two paddle sizes and three variations of thoracic anatomy. Anatomical variations did not affect current distributions during electrical defibrillation, whereas paddle position had a marked effect. Paddle positions close to the heart with interposed bony structures between the heart and electrode produced focal regions of much higher than average myocardial current magnitudes. Myocytes in the highest current intensity regions dissipated 49 times the energy dissipated by cells exposed to threshold current magnitudes, potentially causing focal myocardial damage. An alternative paddle position was identified which significantly improved the myocardial current distribution. Maximum energy dissipation was only 4·8 times threshold energy, while defibrillation efficiency was reduced by <7 per cent, minimising the risk of myocardial damage. These results suggest that paddle position plays a dominant role in determining myocardial current distributions and defibrillation-induced damage.

Paddle-wheel type flow meter

Abstract: In a paddle-wheel type flow meter: a paddle wheel has its paddle tips exposed to a fluid being measured; a light source emits a light to one of a pair of optical-fiber cables which are oppositely disposed from each other through a paddle-wheel housing so as to provide a transmission path of the light across the housing, the transmission path being intermittently blocked off with the paddle tips of the paddle wheel as the paddle wheel is rotatably driven by thge fluid to produce an optical-pulse train directly proportional to the rotational speed of the paddle wheel; the optical-pulse train is translated into an electrical-pulse train through an optical receiver or photoelectric converter connected to the other of the pair of the optical-fiber cables; and the electrical-pulse train is supplied to a suitable digital instrument to determine a flow rate of the fluid, because the flow rate is substantially proportional to a frequency of the electrical-pulse train corresponding to the rotational speed of the paddle wheel.

Adjustable agitator assembly

Abstract: An adjustable agitator assembly having a hexagonal shaft to which is attached a hexagonal hub. A mounting block is attached to the hub at the desired locations. The mounting block has a receptacle to receive the splined shaft of a paddle. The splines allow the orientation of the paddle to be changed to many different discrete positions while at the same time preventing the paddle shaft from slipping. Seals are used to prevent penetration of the contacts between the various parts of the assembly by the media which is stirred.

Oar for racing shells and method of making same

Abstract: A resin and transfer molding technique is used to fabricate, in a unitary fashion, a synthetic oar that has as a core, polyurethane and a longitudinal rigid rectangular spline preferably sitka spruce which transverses orthogonally and extends along the longitudinal axis of the shaft of the oar, the shaft handle therefore and opposite paddle end being unitarily molded according to the resin transfer molding technique. Prior to such molding a green oar substructure is made of the shaft and handle on the one hand, and the paddle on the other hand where a multi-layer wrap of synthetic material is formed over the spline in relation to the shaft and in the paddle mold in relation to the paddle and the cavities are cores thereof filled with green polyurethane. The two components so formed, being the green paddle, and the green shaft, are merged together and further wraps of synthetic material overlaid. The enwrapped overlayed green oar is placed in the resin transfer mold wherein a thermo-setting resin is inserted, the mold elevated to a curing temperature, and the complete oar fabricated. On cooling it is removed and the outside surface finished as required.

Food stirrer for microwave oven

Abstract: A stirrer for use in a microwave oven with a turntable, has a stirring paddle 16 supported in a cooking utensil 10 by central bearings and a shaft 15 from which an arm 17 extends to engage a side of the oven. When the utensil is releasably secured onto the turntable 12, then rotated, the contents are stirred against the face of the paddle which is held stationary by the arm bearing against the oven wall. Clips 14 can hold the utensil 10 on the turntable. The stirrer may be a paddle (30, Fig. 3) supported on an eccentric shaft coupled to a drive wheel (32) that bears against the inner surface of utensil 10 so that rotation of the utensil rotates the paddle.

Emergency paddle kit

Abstract: An emergency paddle kit for sailboards is disclosed. The kit comprises at least one shaft which has a paddle blade attached to one end, which shaft is releasably attached to the boom of a sailboard. When the sail of the sailboard is not used to propel the sailboard through the water, the shaft may be released from the boom and the paddle may be used to propel the sailboard through the water. The emergency kit may further comprise a second shaft which has a second paddle blade attached to one end, which second shaft is also releasably attached to the boom of the sailboard. The first and second shafts may be connected together to form a kayak-type paddle which may then be utilized to propel the sailboard through the water. The emergency kit may further comprise a number of attachments, such as shaft extensions and a paddle handle which may be attached to the shaft and/or to each other.

Rocker type propulsion mechanism for a boat

Abstract: A rocker type propulsion mechanism for a boat includes a rocker arm pivotally provided on the boat, a lever arm being laterally connected to the rocker arm for rockably actuating the rocker arm, a paddle being pivoted on an other end of the rocker arm, and a blocking device being provided beside the paddle for limiting a rotation of the paddle. A rotation of the rocker arm causes the paddle to make a relative movement with water in order to propel the boat.

Mixers with interengaging paddles

Abstract: With reference to Figure 1, a continuous mixer 1 comprises a housing 2 formed with intersecting cylindrical chambers 3 and 4, and a pair of substantially parallel shafts 5 and 6, mounted for rotation within the housing. Paddle members 10 and 11 are mounted on the shafts 5 and 6 so that when the shafts are rotated, each in the same direction, the peripheral parts of the paddle members on one shaft are wiped by the cooperating parts of the paddle members on the other shaft, and vice versa . As shown in Figures 4 a and 4 b , the end faces of each paddle member are formed with lobes, the number of lobes at one end face of the member being different to that at the opposite end face. The arrangement results in continuous distribution, re­orientation and dispersal of material flowing through the mixer.

Exercise machine safety switch

Abstract: An exercise machine has an electrical safety switch which switch includes a base with a switch actuator attached thereto. A paddle is rotatably attached to the base for movement toward and away from the actuator. The paddle has an upper element and a lower element to form a void therebetween. The lower element as an aperture through which the actuator passes when the paddle is depressed. Placement of an enabling card in the void obstructs the aperture and enables operation of the actuator between "on" and "off" positions by depression of the paddle. Removal of the enabling card prevents accidental actuation of the machine.

Paddle wheel distributor system for printed products

Abstract: To provide for gentle braking by braking fingers (12) located in axial slots between paddle wheel vanes or blades (9, 10) of paddle wheels (8), the fingers have an outer contour which is shaped and dimensioned, at least in the inlet region of gaps (11) for the printed product forming an intersection angle (α) defined by the axial projection between the contour of the braking fingers and the adjacent inner surface (91) of a vane or blade to continuously increase during rotation of the paddle wheel vanes or disks, to thereby define effective gaps of continuously decreasing width during rotation of the paddle wheel vanes. Preferably, the position of the fingers is adjustable along a predetermined direction (X) by an electrical closed loop positioning system (13 -20, 43), receiving input signals (44, 45) representative of thickness of products and machine speed and, preferably, also emergency control signals (48) to control the position of the fingers with respect to the vanes or blades. Emergency control signals cause withdrawal of the blades to a maximum effective gap position, for example upon tearing of supply belts; increased braking by the fingers, with a narrowed gap, at different axial positions can be used to overcome skew of incoming or delivered products.

Through-flow type stirring paddle

Abstract: A stirring paddle is the foremost functional component of a stirring and mixing device. The utility model discloses a through-flow type stirring paddle which is characterized in that through-flow holes are arranged on a traditional stirring paddle. The utility model used on the stirring and mixing device can overcome the defects effectively that the traditional stirring paddle has low efficiency, and high energy consumption; when the utility model is used for stirring the system media of liquor-liquor or liquor-solid with non-uniform density, insufficient medium stratification in varying degrees exist. Compared with the traditional stirring paddle under the identical working condition, the through-flow type stirring paddle can increase the efficiency by more than 35% and reduce the energy consumption by more than 20%.

Material ejecting paddle

Abstract: Removable paddles are disclosed for use on a grain auger to assist material flow when changing direction of flow from parallel to the auger's longitudinal axis to a flow path at right angles to the longitudinal axis of the auger. The device provides a mounting attachment at the base of the paddle unit using bolts through the auger tubing. The base of the paddle unit extends nearly perpendicular to the paddle-shaped member oriented lengthwise with the auger's longitudinal axis. Auger rotation thereby positively ejects transported material on contact with each revolution of the auger. Each paddle exhibits an "L" shaped cross section and the area, shape and angular orientation of the paddle blade is determined by the material requirements upon the auger tubing. Methods of paddle unit manufacture are also disclosed.

Knock out paddle shaft for mixing machines

Abstract: A removable three-piece paddle shaft assembly (30) for use in a mixing machine such as a mortar mixer (11) is disclosed. Three-piece paddle shaft assembly (30) includes paddle shaft drive spindle (31), main paddle shaft (32), and a paddle shaft supporting spindle (33). Main paddle shaft (32) is coaxially coupled at its ends to paddle shaft drive spindle (32) and the paddle shaft supporting spindle (33) using a pair of removable coaxial couplers (35). Removable coaxial couplers (35), here each consist of a spline type connection and a cooperating coupling nut (38). Coupling nuts (38) are provided with radially extending hammer protuberances to facilitate rotation of the coupling nuts using only a hammer. Complete removal and reinstallation of main paddle shaft (32) can be accomplished without disassembly of cylindrical mixing drum (12) or double-action bearings (15) and (16).

Heat control device for space navigation body

Abstract: PURPOSE:To perform efficient temperature control by providing a thermal shield member freely adjustable for motion in a space navigation body and opposite to a radiation surface for heat control on the surrounding wall of the space navigation body, and a drive control means for controlling the motion of the aforesaid member to regulate the area of the radiation surface. CONSTITUTION:The radiation surface 11 of a satellite body 10 is shielded with the opposing panel surface of a solar battery paddle 12 folded and housed until, for example, arrival at a stationary orbit for the maximum operation of installed equipment. In addition, a portion exposed from the panel surface of the solar battery paddle 12 is shielded with a thermal shield member 13, and heat dissipation therefrom is restricted. Also, when the satellite body 10 reaches the stationary orbit, the solar battery paddle 12 is expanded, and the thermal shield member 13 is turned under control via a drive mechanism 14 and a control part 15, the radiation surface 11 is exposed to space. According to the aforesaid construction, the radiation surface 11 efficiently dissipates the generated heat of the installed equipment into space, and controls internal temperature to a desired level.

Simulated basketball game

Abstract: A simulated basketball game includes a play surface having baskets at its opposite ends and defining a plurality of ball shooting-position openings each of which overlies a ball propelling paddle. The ball propelling paddles are selectively interconnected so that each player controls a plurality of paddles through a single player controlled fluid pressure cylinder in an offensive mode of play. Each player also controls a defensive player-figure which requires relatively precise timed actuation in order to block an opponent's shot.

Apparatus and method for utilising wind energy as a wind paddle pump

Abstract: The essential feature of the invention is to be seen in using the flow energy over a large area and in diverting it with as high an efficiency as possible into a lifting motion for conveying liquids. This is achieved by means of a streamlined paddle (1) which is fastened on a mast (2) in a centrically rotatable manner (3 and 4), the mast being constructed as a transmission lever and large forces thus being capable of acting on the hydraulic system connected. By means of the resulting pressure, the liquids can be conveyed or pumped to a geodetic height and used as an energy store. If a number of wind paddle pumps is grouped together as a wind park, a relatively large reservoir can certainly be supplied, from which water power stations, water works etc. can be served. Since, however, even one unit can be operated economically, the acceptance by consumers is expected to be high. The method with the associated apparatuses can also be applied to flow utilisation in the sea and in water courses.

Paddle suspension device

Abstract: This invention relates to a device for suspending a double-ended paddle which is used to propel a small water craft. The device can be readily disassembled and stored and has particular application to kayaks. In the preferred embodiment of the invention the paddle is supported by an elastic member attached at its midpoint. The elastic member depends from a freely swinging overhead boom which projects from a mast mounted to the water craft in front of the paddler. The paddle location and paddle lifting force can be adjusted.

Dual-purpose variable paddle pump

Abstract: The utility model discloses a dual-purpose variable paddle pump. The exicrcles of two stators of the pump is provided with a bush. A flow distribution plate is arranged between the two stators. The two rotors are respectively arranged at both sides of the flow distribution plate. A stroking mechanism can effectively push the two stators to rotate, and consequently, quantitative governing is realized, the abnormality caused by the bolting of blades is avoided, and stable and good working condition is established by rubbing pairs. The utility model has the advantages of stable flow quantity, less noise, high reliability, balanced the radial force of a spindle, etc. As a consequence, the pump is a novel variable pump and an energy-saving pump, having good performance and applicable in various hydraulic systems.

Canoe paddle assembly

Abstract: The present invention provides a paddle assembly particularly designed for attachment to a canoe. The paddle assembly comprises a plurality of paddle members at opposite ends of the assembly, a central crank with sideways extending drive shafts to the paddle members, a pair of spaced apart gunwale clamps through which the drive shafts are rotatably fitted and an adjustable cinch strap between the gunwale clamps for wrapping beneath the canoe and cinching the gunwale clamps down onto the canoe to secure the paddle assembly in position.

Depositing device with a paddle wheel for folded articles

Abstract: of EP0340434In a known fan delivery consisting of a plurality of paddle wheel discs which are spaced axially from one another, there are fixedly arranged in the interspaces braking tongues which partially narrow the gap formed by every two neighbouring paddles for the purpose of receiving a folded article and thereby brake the folded article. The braking takes place very abruptly. An adjustment facility for the braking tongue is not disclosed. The braking tongue has an outer contour which in axial projection forms an angle of intersection with the inner side of a paddle which passes by in rotation, at least in the inlet region of a folded article, this angle continuously increasing upon further rotation. Thus, on its path in the paddle wheel, the folded article is continuously slowed down to a residual speed. Moreover, the braking tongue can be displaced as a function of the thickness of the article and the machine speed. Folding apparatus for printing machines.

A solid fuel container and dispensing apparatus.

Abstract: A fuel container and dispensing apparatus comprises a refillable container 10, a rotatable paddle 30 having a plurality of blades 31 and a funnel 20,21 for feeding fuel to the paddle element, whereby rotation of the paddle 30 causes a quantity of fuel to be dispensed between two blades of the paddle The funnel 20,21 has two protrusions 22,23 which co-operate with the blades 31 of the paddle 30

Flow rate detector

Abstract: PURPOSE:To detect a flow rate with high accuracy and to further arbitrarily regulate a flow rate measuring range, by displacing the core of a differential transformer type transducer according to the revolution of a paddle. CONSTITUTION:A flow rate detecting paddle 6 is provided so as to protrude in a fluid flow passage. For example, a coil 5 is provided to the outside of the shield tube 1a provided on the wall of the flow passage so as to protrude outwardly therefrom and a core 2a is provided in the tube 1a to constitute a differential transformer. the paddle 6 and the core 2a are connected, for example, by a mean such as a cam so that the core 2a can move in the tube 1a corresponding to the revolution of the paddle 6. By this constitution, the core 2a moves as the paddle 6 revolves corresponding to the flow speed of a fluid and stops at a position well-balanced with the force of a spring 3. Therefore, the signal corresponding to the stop position of the core 2a is outputted from the coil 5 of the differential transformer to be inputted to an indicator or controller and the appropriate operation corresponding to the flow rate of the fluid can be performed.