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    Pattern catching in a photoelectric pattern contour tracing system
    1.
    发明授权
    Pattern catching in a photoelectric pattern contour tracing system 失效
    在电光模式轮廓追踪系统中的图案捕捉

    公开(公告)号：US3566129A

    公开(公告)日：1971-02-23

    申请号：US3566129D

    申请日：1969-04-28

    Applicant: STEWART WARNER CORP

    Inventor： BARDWELL FRANCIS G ,  MAZUR RICHARD A

    IPC: B23Q35/14 ,  G01N21/30 ,  G05B1/00

    CPC classification number: B23Q35/14

    Abstract: A pattern contour-tracing system which is capable of intercepting and locking on the pattern contour from a position removed from the contour without the use of a leadin contour. The pattern contour-sensing head is pointed so as to travel in a line toward the contour with the sensing head steering means locked out until the sensing means detects that the sensing is within a predetermined distance of the contour. The steering means is then unlocked so that the sensing head can be automatically steered by the servo means to make a smooth transition into the path defined by the pattern contour. A photosensitive tracing system is disclosed which is operable to lead into and trace the pattern contour whether the contour is defined by a line or an edge.

    Scanning head arrangement having servo motor armature secured to shaft on which photocell is carried
    3.
    发明授权
    Scanning head arrangement having servo motor armature secured to shaft on which photocell is carried 失效
    具有伺服电动机的扫描头装置安全保存在光电子载体上的轴

    公开(公告)号：US3704373A

    公开(公告)日：1972-11-28

    申请号：US3704373D

    申请日：1971-09-30

    Applicant: STEWART WARNER CORP

    Inventor： BARDWELL FRANCIS G ,  DOBRAUZ JOHN W ,  SOBCHAK FRANK L

    IPC: B23Q35/128 ,  B23Q35/40 ,  G06K11/02 ,  G05B19/36

    CPC classification number: B23Q35/128 ,  B23Q35/40 ,  G06K11/02

    Abstract: The following specification describes a tracing scanning head having a photocell for sensing the presence of a pattern. The cell is supported on one shaft of a pair of coaxial shafts for movement transverse to the shaft axes. A pinion carried by the other shaft engages a rack carried by the one shaft for moving the photocell in response to rotation of the other shaft to compensate for the kerf or tool cutting width. A servo motor armature is fixed to the one shaft and rotates the one shaft and photocell to maintain the photocell angularly aligned with the line. A pair of easily readable knobs are provided at the upper end of the shafts to permit the offset to be easily determined. A preamplifier is carried by the one shaft to amplify low level photocell signals before they are transmitted over slip rings and brushes, and a neon bulb shielded by a metal ring casting lights the drawing pattern. A transparent shield depending from the casting protects the photocell lens. A pair of lamps cast indicia on the paper to enable the direction of scanning head travel to be easily ascertained.

    Abstract translation: 以下说明书描述了具有用于感测图案的存在的光电管的跟踪扫描头。 电池支撑在一对同轴轴的一个轴上，用于横向于轴的轴线运动。 由另一轴携带的小齿轮接合由一个轴携带的齿条，用于响应于另一轴的旋转而移动光电池，以补偿切口或刀具切割宽度。 伺服电动机电枢固定在一个轴上，并使一个轴和光电池旋转，以保持光电管与线路成角度对准。 在轴的上端设置有一对容易读取的旋钮，以允许偏移容易地确定。 前置放大器由单轴承载​​，以便在通过滑环和刷子传输之前放大低电平光电信号，并且由金属环铸造屏蔽的氖灯照亮绘图图案。 透明屏蔽由铸件保护，保护光电池透镜。 一对灯在纸上投射标记，以便能够容易地确定扫描头行程的方向。

    PATTERN CONTOUR TRACING APPARATUS
    8.
    发明专利
    PATTERN CONTOUR TRACING APPARATUS 未知

    公开(公告)号：CA977438A

    公开(公告)日：1975-11-04

    申请号：CA166215

    申请日：1973-03-15

    Applicant: STEWART WARNER CORP

    Inventor： BARDWELL FRANCIS G

    IPC: G01B11/00 ,  B23Q35/128 ,  G01D5/26 ,  G05D3/00

    Abstract: Line or pattern edge contour tracing apparatus incorporating a triangularly shaped pair of photocells receiving either direct or pulsating light from the line or edge to be traced. The triangularly shaped photocell pair carried by a sensing head are arranged in overlapping positions across the line or edge to be traced and across the direction of sensing head movement to enable the entire area of each cell to be used in sensing line displacement or orientation. Providing successive pairs of triangularly shaped photocells arranged across the line or direction of travel and in circuits for combining their outputs provides resultant signals indicative of the deviation of the sensing head from the line or edge being traced with the output of the cells selected and combined dependent on whether an edge or line is traced and the tracing speed for controlling servo motors to drive the sensing head along the line or edge. In addition the output of selected cells are controlled to ensure the sensing head properly orients to the line when tracing at slow speed.

    LINE OR PATTERN FOLLOWING SYSTEM HAVING AN ANNULAR ARRAY OF PHOTOSENSITIVE DEVICES
    9.
    发明专利
    LINE OR PATTERN FOLLOWING SYSTEM HAVING AN ANNULAR ARRAY OF PHOTOSENSITIVE DEVICES 未知

    公开(公告)号：CA1227260A

    公开(公告)日：1987-09-22

    申请号：CA306769

    申请日：1978-07-04

    Applicant: STEWART WARNER CORP

    Inventor： BARDWELL FRANCIS G

    IPC: G05D3/00 ,  B23Q35/128 ,  G06K11/02

    Abstract: This disclosure deals with a line or pattern following system for use with a machine including first and second motors for moving a device in first and second generally perpendicular directions. The system includes an array of light sensitive elements arranged at angularly juxtaposed positions, the array being positioned adjacent said line or pattern. An image of the line or pattern falls on the array and makes an angle .theta. with reference point on the array. The system further includes means for sequentially scanning the outputs of the elements, and angle means responsive to said outputs and to said reference point for generating first and second signals. The first signal is a function of sin .theta. and is connected to control energization of the first motor, and the second signal is a function of cos .theta. and is connected to control energization of the second motor. The two motors, thus energized, produce relative motion of the array and the line or pattern, and move the array to follow the line or pattern.

    10.
    发明专利
    未知

    公开(公告)号：DE2829251A1

    公开(公告)日：1979-01-25

    申请号：DE2829251

    申请日：1978-07-04

    Applicant: STEWART WARNER CORP

    Inventor： BARDWELL FRANCIS G

    IPC: G05D3/00 ,  B23Q35/128 ,  G06K11/02

    Abstract: This disclosure deals with a line or pattern following system for use with a machine including first and second motors for moving a device in first and second generally perpendicular directions. The system includes an array of light sensitive elements arranged at angularly juxtaposed positions, the array being positioned adjacent said line or pattern. An image of the line or pattern falls on the array and makes an angle .theta. with reference point on the array. The system further includes means for sequentially scanning the outputs of the elements, and angle means responsive to said outputs and to said reference point for generating first and second signals. The first signal is a function of sin .theta. and is connected to control energization of the first motor, and the second signal is a function of cos .theta. and is connected to control energization of the second motor. The two motors, thus energized, produce relative motion of the array and the line or pattern, and move the array to follow the line or pattern.

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