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Ruth B Marantette

William F Marantette

William E Marantette

The system effects positioning of an art work at precise given X and Y rectangular coordinate points. This art work may correspond to drill hole positions in a printed circuit board. By recording in memory the exact rectangular coordinate points on the art work and the necessary servo signals to effect exact centering at the coordinate points, accurate circuit board drilling can be carried out. A circular hole is provided in the art work and an image of this hole projected to a screen having horizontal and vertical cross hairs defining X and Y axes respectively. The art work is precisely positioned at a given pair of rectangular coordinates when the intersection of the cross hairs corresponds exactly with the exact center of the image of the circular hole. Exact centering is achieved by causing first and second light responsive photo cells to oscillate along the X and Y axes directions respectively, the centers of oscillation of the cells corresponding to the intersection point of the cross hairs. If the projected image of the hole is off center, a cell or cells will be exposed to light longer on one side of its center position than on the other. Stated differently, the projected image will only be centered when the scanning cells are exposed to light for equal time intervals on either side of their center of oscillation positions. The difference in such time intervals is used to generate a corrective signal for operating the servos to effect precise center positioning.

Two axis centering system with oscillating photocells

The water powered motor includes a casing housing a rotor shaft. First and second water bearings of conical shape support opposite end portions of the shaft for high speed rotation. The central portion of the shaft has turbine wheels subject to high velocity water flow through the casing. The same high water pressure for driving the turbine also provides water to the water bearings to 'float' the rotor shaft so that very high speeds can be attained with minimum friction. The preferred application for the motor is that of a high speed drill for drilling printed circuit boards. However, it may be miniaturized for use as a dentist's drill.

Water powered high speed motor

Movements of a table are optically recorded on film by mechanically gearing movement of the table to rotate a drum provided with a peripheral row of slots positioned above the film. A light is directed through the slots onto the film as the film is moved and the drum rotated thereby exposing the film to bars of light images which are skewed in accordance with the relative rate of rotation of the drum and speed of movement of the film. Playback is accomplished by developing the film and then passing light through the clear film between the new opaque exposed bars of light images on the film and slots in the drum to suitable photo-cells. During playback the film may be moved at a constant speed and the drum will remain in synchronism with the film and in view of its direct gearing to the table, the table will follow movements determined by the pattern on the film. The photo-cells provide signals in response to any tendency of the drum to move out of synchronism with the bars of light images on the film to bring the drum and thus the table movements into synchronism with the recorded program.

Analog data recording and playback system for path control

The system includes a spindle for holding a high speed drill, the spindle being provided with longitudinal slots permitting its exterior side walls to be biased inwardly and grip the drill. Eccentric weights surround the spindle in such a manner that upon rotation of the spindle at a high speed, the weights are thrown radially outwardly to contract the side walls of the spindle by centrifugal force, thereby gripping the drill shank, the gripping force increasing with the speed of rotation of the spindle. For larger drills, a special collar is provided on the drill shank for engaging flats provided on the spindle to result in a positive locking of the drill shank for rotation with the spindle.

High speed drill system

A system for providing exact centering of an art work target at a given point to thereby provide exact positioning of a printed circuit board to be drilled, by way of example, combines visual as well as automatic electronic means for effecting the centering. The art work target in the form of an annular opaque pad with a clear center is projected onto a rear projection screen on which there are provided X and Y orthogonal axes the intersection point of which defines the exact point for centering of the art work target. Elongated photo cells are positioned quadrilaterally about the intersection point on the orthogonal axes, part of each of the photo cells lying in the opaque area of the target and the remaining portions lying in the clear center portion of the target. Shadows cast by these photo cells are visible on the rear projection screen so that a viewer can observe precisely what the photo cells 'see.' When the target image is precisely centered at the intersection point of the orthogonal axes, all of the signals from the photo cells will be equal. By utilizing difference signals between opposite photo cells aligned with X axis to drive an X servo motor and difference signals between the photo cells aligned on the Y axis to drive a Y servo motor, a table supporting the art work can be automatically moved in the X and Y directions to effect the desired precise centering automatically.

Projection scope and positioning system

A frame structure supports a work surface above which there is provided an elongated head number supporting a series of drills. A torque tube having an axis parallel to and spaced from a line passing through the series of drills is mounted to the frame structure for rotation about its axis. The drill head member is coupled to the torque tube such that rotation of the torque tube initially swings the head member in an arc and thereafter urges the head member through a lost motion coupling arrangement against a pair of spaced parallel guide rails, secured to the frame structure normal to the work surface so that the remaining travel of the drill head is rectilinear. The stiffness of the torque tube assures that one end of the elongated drill head will not move ahead or drop behind the other end so that all holes are drilled simultaneously.

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Torrance, CA, United States of America

Ruth B Marantette