摘要:
A disc-like reflector, in addition to preventing excessive cooking of the food in a region immediately adjacent the probe housing, functions as a spring to hold the handle and reflector assembly together. The assembly remains tightly together despite different coefficients of thermal expansion of the various component parts.
摘要:
An electric motor driven bypass type vacuum cleaner apparatus, particularly adapted for wet/dry debris collection includes an open top debris collection tank having opposed integrally formed cup-shaped feet for supporting said apparatus in a stable position on a support surface. The tank includes a recess in a sidewall and a bottom wall for receiving a conduit member which may be interchangeably used as a connector for connecting a flexible vacuum hose to the tank and as a blower discharge nozzle. A flexible vacuum pickup hose is connected to the conduit member generally at the bottom side of the debris collection tank and, in a stored position on the apparatus, is trained through a recess in the bottom wall of the tank and over the top of a motor housing and shroud assembly to a connection point in one of the support feet adjacent the conduit member. The vacuum hose, when stored, is retained in a recess in the shroud which also serves as a carrying handle for the apparatus. The vacuum impeller drive motor is mounted in a housing assembly including separable tank cover, motor base and motor housing members. The motor base and tank cover form a discharge volute chamber for the vacuum impeller. Motor cooling air inlet and discharge passages are formed by and between the motor housing member and the shroud.
摘要:
A work piece holding mechanism which provides multi position part holding capability to automatically sequentially hold and present a work pieces in multiple orientations for work thereon. The work piece holding mechanism includes two rotatable clamp means for clamping the work piece therebetween. Rotation of at least one of the rotary clamps is driven by a rotary drive mechanism, preferably a rotary air cylinder. The rotary air cylinder is provided with at least one fixed rotational stop. In addition, the rotary air cylinder may be provided with one or more actuatable intermediate stops. Rotation of the work piece can be accomplished by driving the rotary air cylinder to a predetermined position against either a fixed stop or an actuatable stop. Each of such stop positions results in a different orientation of the work piece and thus a different work plane on which the robot can operate. Loading of the work piece into the holding mechanism can be performed automatically by the robot with the robot controller also commanding the opposing clamps of the work holder to engage the work piece. Similarly, removal of the work piece from the holding mechanism can be automatically performed with the robot and robot controller.
摘要:
A variable dwell cycloidal indexing device for converting a uniform rotational motion into intermittent rotational motion with greater than one predetermined dwell point. The device includes an input shaft having an axis of rotation with a stub shaft extending eccentrically from a distal end of the input shaft. A planetary gear is rotatably mounted on the stub shaft. There is an internal gear rotatably supported on the input shaft and mounted coaxially therewith with the planetary gear intermeshing with said internal gear. A crank pin projects from the planetary gear at a position eccentric to the axis of rotation of the planetary gear. The motion of the crank pin during rotation of the input shaft is defined by allowing the crank pin to oscillate in a slide slot at a fixed location, or by attaching the crank pin to a pivoting link which is, in turn, attached to a fixed point. In either case, rotation of the planetary gear about its own axis is limited. The number of dwell points is determined by the gear ratio between the internal gear and the planetary gear.
摘要:
Apparatus for providing a variable angular velocity coupling between an input shaft (52, 78) and an output shaft (71, 138) includes a fixed frame (72, 74, 76); a first hearing (80) for mounting the input shaft for rotation relative to the fixed frame; a second bearing (140) for mounting the output shaft for rotation relative to the fixed frame; a pair of conjugate cams (48, 50; 82, 84) mounted to the fixed frame, concentric with the input shaft: a first cam follower (54, 60; 114, 118) pivotably supported (64, 66; 90, 92, 98, 100, 102, 104) by the input shaft for engaging a first of the cams; a second cam follower (56, 58; 116, 120) pivotably supported by the input shaft for engaging a second of the cams; a first link (68, 122) extended between the first and second cam followers to cause the followers to move in tandem in response to rotation of the input shaft relative to the cams: an radially extended output arm (70, 136) supported by the output shaft; and a second link (72, 74; 132, 134) extended between at least one of the cam followers and the output arm to rotate the output shaft in response to rotation of the input shaft, the cams having profiles (50; 148, 150, 152) to cause a relative angular displacement between the input and output shafts, thereby creating a sinusoidally varying angular velocity of the output shaft over a portion of each revolution in response to a constant angular velocity of the input shaft.
摘要:
A mask neutral network for processing that allows an external source of control to continuously direct state transition of the neural network toward selected states and away from other states. The network, through externally controlled masking, can focus attention on selected attributes of observed data, solutions or results. The masking is appliciable across three major categories of networks in that it facilitates augmented recall, directed learning and constrained optimization.
摘要:
A method and apparatus for converting radiant energy levels to digital data wherein an image sensor is provided having at least one row of sensor elements each including a light sensitive capacitor and an access switch and which changes state produces a corresponding binary output signal when a predetermined charge threshold is exceeded by the capacitor whose charge is a function of intensity and period of an illumination. The row of elements is first calibrated by illuminating same with a reference light source and sensing at a first frequency (F) such that approximately one half of the elements change state and counting the digital output signals corresponding to the changes of state to obtain a first number (B). Thereafter, the row is illuminated with an unknown light source which has a lower radiant energy level than that of the reference light source and senses at a frequency F/2. The digital output signals corresponding to the changes of state are counted to obtain a second number (A). The numbers A and B are compared to produce a digital "1" signal when A>B and a digital "0" when A
摘要:
A microwave oven is provided with a cooking cavity and an access door. The oven has a food temperature control system for monitoring the internal temperature of food being heated in the oven, and turning off the microwave power at the completion of a heating cycle, or for holding a predetermined temperature for a timed cycle. A temperature-sensing probe is adapted to be inserted into the food. The probe is equipped with a flexible electric cable that is joined to one wall of the cooking cavity for connecting the probe in a control circuit for the microwave generator. This flexible cable is provided with a plurality of diameter-increasing protrusions so, in the event the cable extends outwardly of the cooking cavity, the oven door may not be closed.
摘要:
A method for making a shadow mask array is taught. Producing a plurality of shadow mask sections; inspecting the plurality of shadow mask sections to determine which shadow mask sections are acceptable as meeting predetermined criteria; positioning a predetermined number of the acceptable mask sections into predetermined locations relative to one another to form a mask section array thereby distributing any error in individual mask sections across the mask section array; and attaching the individual mask sections of the mask section array to a support structure. The support structure allows for expansion and/or contraction of the individual mask sections of the mask section array while maintaining relative positioning of the individual shadow mask section in the shadow mask array. The support structure further allows for compliance of the shadow mask array in a direction normal to the plane of the shadow mask array thereby allowing for a substantially planar interface between the shadow mask array and a substrate to be coated.
摘要:
A method for determining if a robot gripper assembly (preferably servo controlled) has acquired a work piece wherein the robot gripper assembly includes at least two opposing fingers comprising the steps of commanding the robot gripper assembly to close the two opposing fingers to a predetermined position to acquire the work piece, the predetermined position being less than or different than the expected work piece dimension; quantifying the movement of the two opposing fingers when the closing step has been completed; comparing the actual position to the predetermined position to determine a position error; and recognizing that a work piece has been acquired by the two opposing fingers if the position error is not zero indicating that the interference of the work piece between the two opposing fingers has prevented the two opposing fingers from achieving the predetermined position.