Cutting by use of rotating axially moving tool – With work-engaging structure other than tool or tool-support – Movable relative to tool along tool-axis
Patent
1977-01-07
1978-04-04
Hinson, Harrison L.
Cutting by use of rotating axially moving tool
With work-engaging structure other than tool or tool-support
Movable relative to tool along tool-axis
B23B 3900
Patent
active
040824748
ABSTRACT:
An attachment for motor powered drills for accurately positioning drill bits when holes of regulable depth and angle are to be drilled in a work piece. An open-centered base for contact with the work piece provides journal supports for paired rotatable trunnions that may reciprocally receive guide rods disposed above the base and at right angles to said trunnions. Paired guide sleeves of a frame attached to the drill motor and disposed parallel to the axis of the drill reciprocally receive the guide rods, and the drill and its bit are, accordingly, movable along the guide rods to cut a desired hole in the work piece. Index means and detents facilitate varied angular positionings for said trunnions and guide rods whereby holes that are angularly disposed with respect to the work piece may be drilled. The guide rods may be extended through the base to provide accurate centering of drilled holes, and a separate jig or vise is provided that holds the drill attachment and drill, etc. in adjusted lateral positions. The frame attached to the drill motor may include a central bearing receiving a shaft extension that is applied to the shaft of the drill motor when the chuck thereof is removed, or the frame may be made integral with the end plate or gear housing of the drill motor.
REFERENCES:
patent: 2680435 (1954-06-01), Gonzalez
patent: 2849900 (1958-09-01), Heidtman, Jr.
patent: 2888965 (1959-06-01), Phillips
patent: 3534639 (1970-10-01), Treichler
patent: 3874810 (1975-04-01), Russell
Hinson Harrison L.
Messenger C. B.
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