Shopsmith, Inc.

James E Berkeley

David D Flora

The present invention provides a compact speed increasing device which may be mounted upon the way tubes of a powered multi-purpose woodworking tool. The speed increasing device includes a horizontal input shaft for connection to the output spindle of the woodworking tool and a vertically oriented output shaft which includes a spindle for mounting a rotating shaper tool bit. The input shaft carries a rotating face plate having an elastomeric sheet attached to one side thereof which is provided for engagement with a drive ring mounted for rotation with the output shaft. The elastomeric sheet on the face plate is positioned in contact with the outer periphery of the drive ring such that rotation of the input shaft results in rotation of the output shaft and the shaper tool bit attached thereto. The drive ring contacts the elastomeric sheet along a circumference of the face plate which is greater than the outer circumference of the drive ring such that the output shaft is caused to rotate at a higher speed than the input shaft.

Speed increaser for woodworking tools

A speed reducing device is provided for use with a multi-purpose woodworking tool such that faceplate turning operations may be performed on large diameter workpieces. The device includes a housing which partially supports input and output shafts passing through opposite sides of the housing. An end of the input shaft located within the housing is formed with a hole for receiving an end of the output shaft within the housing such that the input and output shafts coact with one another to support each other and prevent one another from pivoting about the points at which they are supported by the housing. The input and output shafts rotate relative to one another and are both connected to a sheave by a pair of belts such that the input shaft may be driven by the output spindle of a woodworking tool at a first speed and the output shaft will be driven by the belts and sheave at a slower speed which is acceptable for turning large diameter workpieces.

Speed reduction device

A guard as disclosed for use with a woodworking tool such as a jointer having a worktable, a cutter head and a guide fence for guiding a workpiece through the jointer. The guard is pivotally mounted to the table and is biased toward the guide fence such that it covers the cutter head when a workpiece is not present. The guard includes a body portion and flexible fingers formed integrally with and extending from the body portion toward the guide fence. The flexible fingers act as a featherboard during a jointing operation and the pivotal movement of the guard may be limited such that the fingers engage a workpiece as it is fed through the jointer to thereby apply a biasing force against the workpiece toward the guide fence. The fingers further act to resist movement of the workpiece in a direction opposite to the feed direction during a kickback situation and thereby provide greater control over the workpiece.

Jointer cutter guard with featherboard

The present invention provides a woodworking worktable assembly which may be used in combination with a multi-purpose woodworking tool. The worktable assembly includes a worktable having a work supporting surface and an elongated slot formed therein. A guide insert is positioned within the slot and includes a horizontal base portion and opposing side arms for guiding a guide bar portion of a miter guide. Lip portions extend inwardly toward the center of the insert from the upper ends of the arm portions and serve to prevent the miter guide from being lifted vertically away from the slot. In addition, the base of the insert is spaced from the lower portion of the slot by foot portions extending along the length of either side of the base amd fasteners are provided at the center of the insert for drawing the base toward the lower slot surface. Thus, by tightening the fasteners such that the base is drawn toward the slot surface, the arm portions are caused to pivot inwardly such that the tolerance between the insert and a miter guide received therein may be adjusted.

Woodworking workable assembly having an extruded T-slot

An anti-kickback system for use with a table saw or the like consists of a splitter adapted to be mounted on the table saw and including an elongated slot therethrough inclined relative to the table top, a pair of cams, each having peripheral, work-engaging surface including a spiral segment, and a pin attached to the cams and extending through the slot to form a pivot axis for the cams at approximately the centers of the spiral segments. The slot is sized to slidably receive the pin and includes an upper, elongated edge having a plurality of arcuate shaped detents sized to receive the pin. Movement of a workpiece in a kickback condition beneath the cams causes the cams to be pivoted and displaced upwardly to lock the pin against one of the detents so that the workpiece is clamped between the table top and a portion of the spiral segment of the cams. The spiral is shaped such that any point of contact of the segment with a workpiece in a kickback condition is at a radius extending to the pivot center of a cam which makes an angle of approximately 8.degree. with a line extending through the pivot axis perpendicularly to the table top.

Anti-kickback system

A cutter head system for a woodworking tool in which one or a plurality of discrete cutter segments may be mounted on a shaft of a selected length to form a cutter head for either a jointer, a planer or a molding cutter. Each segment has a plurality of slot portions spaced about its outer periphery and is adapted to be mounted on a shaft so that the slot portions of ganged segments form continuous slots which are substantially coextensive with the segments. A plurality of blade members are positioned within and are coextensive with the slots, wedge plates are positioned within the slots for releasably securing the blade members against the cutter segments, and mounting screws urge the wedge plates against the blade members. Sets of blade members and wedge plates of varying length are used which correspond in length to the length of the slots formed by the segments. In a preferred embodiment, each cutter head includes screws at the base of the slots which may be adjustably positioned relative to the cutter head to support the blade members at an appropriate height.

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Dayton, OH, United States of America

James E Berkeley