Abstract: A device for full depth hand routing characterized by a two piece base including a foot block and an attachment block, the attachment block being held to the foot block by a connector bolt and two adjusting screws to enable attaining parallel planes for a tool in the base of the block; a cantilevered holder extending from the attachment block; a tool on a shaft that is powered by a motor within a housing that has a substantially cylindrical barrel and a protruding threaded male part threaded engaging a threaded aperture on the cantilevered holder; an indicator scale around the base of the barrel and above the threads; and indicator carried by the attachment block and extending upwardly adjacent the depth scale such that accurate depth positions can be attained for routing to a desired depth. In a preferred embodiment, the cantilevered holder comprises a ring that allows 270.degree. visibility about the routing tool. Also in the preferred embodiment, the foot block has an upstanding flange at 90.degree.

Abstract: The disclosure relates to a joint fastening two slats on boards of wood perpendicularly to one another and the method and apparatus for making that joint. Abutting ends of wood bevelled at 45.degree. angles to one another are locked in place by a bevelled wood spline which fits into dovetail grooves cut by a router through the slates. The jig for cutting the dovetail grooves includes a slotted template and a clamping apparatus for holding the wood at an angle to the template. A router is guided by the template to make the appropriate grooves which receive the spline. Another portion of the jig includes a slotted template which guides the router for bevelling the spline.

Abstract: An apparatus and method for cutting wallboards, such as gypsum wallboards or rock wallboards to an appropriate size and shape, and for locating utility boxes hidden behind a panelled wall and cutting of a section of the wall at the opening of the utility boxes. The apparatus of the invention comprises a portable hand tool having an adjustable rest for adjusting the depth of cut and a built-in ruler-guide arrangement permitting to cut parallel to a side of a wallboard or permitting to cut circles in a wallboard. The hand tool may be used in combination with a separate locator and cut-out template member positioned in utility boxes mounted behind an installed wall, which provides an indication of the location of each utility box by way of a wallboard puncturing prong, for cutting out an opening in the wallboard, following appropriate guide grooves in the face of the locator and cut-out template.

Abstract: The present router guide has a guide plate for attachment to the base of a router with a central opening for passing the router bit. On the bottom, the guide plate has a series of openings spaced apart along a spiral of progressively increasing radius which has the central opening as its center. A pivot pin is selectively insertable into any one of these openings. This pivot pin has a pointed end for insertion in a workpiece at the center of a circular groove which is to be cut in the workpiece by the router bit as the guide plate is rotated about the pivot pin.

Abstract: A plunge type router is disclosed which includes an improved depth lock system operative to exert a clamping force directly on the motor housing and which distributes the clamping force over a substantial surface area thereof whereby the motor housing may be securely retained in position without damaging or distorting the housing. An adjustable depth stop system is also provided which provides a positive, easily, accurately adjustable stop member engageable by a portion of the motor housing and an associated rack and pinion adjustment assembly operative to accurately locate the stop member so as to provide positive control of the depth of cut.

Abstract: A plunge type router is disclosed which includes a base housing having a work engaging surface and an upper portion within which a driving motor is supportingly mounted for reciprocable movement with respect thereto. A pair of extension coil springs are provided extending between a first pair of projections provided on the upper portion of the base housing and a second pair of projections secured to the motor housing which operate to continuously bias the driving motor into a retracted position. The extension springs are arranged in the form of loops positioned on opposite sides of the router and are concealed and protected by a pair of handles secured to the motor housing which handles are movable therewith.

Abstract: An apparatus and method for guiding a router bit relative to a guide surface on a workpiece includes a pair of guide pins adapted to be supported in generally fixed relation to the router bit and in spaced-apart relation from one another and the router bit. The guide pins are maintained in continuous engagement with the guide surface of the workpiece and moved therealong while the router bit cuts into the face of the workpiece to form a routed line thereon. In one embodiment, the guide pins are secured to the underside of the router tool at positions spaced apart from one another and radially spaced from the router bit protruding from the underside of the tool so that the router tool may be guided along the workpiece by the continuous engagement of the guide pins with the guide surface.

Abstract: The present router guide has a guide plate with a central opening for passing the router bit, and an eccentric periphery and a groove in the top extending parallel to that periphery. A slide is coupled to the guide plate at the groove and it presents a straight edge disposed beyond the guide plate for sliding engagement with a reference surface to guide the router bit along a path parallel to that surface. The slide can be clamped to the guide plate at any selected position along its eccentric periphery, thereby determining the spacing of the router bit from the straight edge on the slide. The coupling between the slide and the guide plate at the latter's groove keeps the straight edge on the slide perpendicular to a radius from the router bit out to the slide. The guide plate has a series of bottom recesses arranged in a spiral around its central opening and each providing a possible location for a pivot pin when the router is used to cut a circular groove in a workpiece.

Abstract: A cutting guide for cutting plastic laminate material is used in conjunction with a conventional router. The cutting guide includes an elongate, flat base plate having an opening in one end portion thereof for receiving the bit of the router which has been mounted thereabove. An elongate guide fence is disposed transversely below the base plate and is mounted on a sliding carriage for movement toward and away the router cutting tool. An upwardly biased support roller is axled on the horizontal leg of an L-shaped axle to make rolling contact with a strip being cut from a larger sheet of material along a line parallel to the length of the fence. An auxiliary roller is axled to the trailing end portion of the fence to support the edge portion of the strip of material opposite the cutting tool.

Abstract: A holder for a portable electrical cutting instrument having a cutting tool, the holder comprising a base plate having a planar bottom surface, an aperture in the base plate through which a cutting tool projects, means for clamping the cutting instrument above the aperture, first and second angular adjustment means secured to the top surface of the base plate on each side of the clamping means, a rigid harness interconnecting the first and second angular adjustment means with the clamping means for unitary movement therewith in angular planes of adjustment, whereby to provide tilting of the cutting instrument at least 45.degree. in two directions from a plane vertical to the base plate, an elongated straight edge guide having a bottom surface coplanar with the planar bottom portion of the base plate, means for moving the edge guide to a desired position of adjustment relative to the cutting tool and parallel to the angular planes of adjustment.

Abstract: An arrangement for producing grooves in walls, ceilings and the like with the use of a hand-held processing machine, has a rotatable material-removing tool driven in rotation by the machine, and a housing surrounding the tool. The housing has a guiding piece through which the tool extends. The guiding piece has a guiding surface which is adapted to lie on the surface of the wall, ceiling and the like, and is inclined at an acute angle relative to the axis of the tool. The guiding piece is detachably mounted on the processing machine.

Abstract: A power tool cutting guide for making plural parallel cuts or arcuate cuts in a workpiece has a member, rotatable within the circular track of a frame, which can be fixed in any angular orientation relative to the workpiece, a guide assembly joined to the rotatable member on which a tool support plate can slide between positionable stops, and a ratchet arm with an attached pawl which engages the serrations in a rack so as to incrementally move a workpiece along a fence. The guide also features a spring-urged retention arm which holds the workpiece firmly against the fence during cutting and means for automatically withdrawing the cutting tool from the workpiece surface upon completion of the cut.

Abstract: A digital read-out system for a portable power tool that is adapted to provide a precise digital reading of the depth adjustment of the blade of the tool. The system includes a position encoding device that is coupled to the blade adjustment mechanism of the tool. The encoder provides position feedback information to a microprocessor which is programmed to calculate the amount of blade adjustment made relative to a preselected reference positioned. In the preferred embodiment, a mercury switch is provided which is interrogated by the microprocessor to determine the orientation of the tool so that the orientation of the digital display can be controlled accordingly. In this manner, the display automatically appears rightside up even when the blade adjustment is made with the tool upside down. A mode select switch is also provided for selecting between English and Metric units.

Abstract: An attachment for power tool such as a router adapted to cut an end of circular cross-section onto a rectangular piece of wood suitable for use as a circular tenon in mortise and tenon construction, the attachment being formed from a block of solid material adapted to be attached to the power tool adjacent the cutting element thereof, said block of solid material having a recess therein with a solid pointed metal element such as a drill bit centered in said recession, attached to the bottom thereof and protruding therefrom to form a point upon which the wood to be cut can be rotated, there being a groove or cut-away portion in said block adjacent and extending into a side of said recession to receive the cutting element of the tool.

Abstract: A router assembly including a router sub-assembly vertically adjustable relative to a supportive base plate through the utilization of a sub-assembly supported rack gear and a pinion gear meshed with the rack gear and journaled from the base. The base includes a handle portion for horizontal directional control of the router assembly during routing operations and oscillatably supported from the base. Connecting structure operatively connects the handle portion and the pinion gear for oscillation of the latter in response to oscillation of the former, whereby adjustable oscillation of the handle will be effective to vertically adjust the router sub-assembly relative to the base plate.

Abstract: A grooving indexer is provided for use with routing apparatus to improve the capability of the apparatus for rapidly routing straight parallel grooves in cabinet doors and similar panels. The routing apparatus is of the type in which a router is mounted on the end of a bar for extension over a panel to be routed and in which the router can be moved in any direction across the panel by reason of the bar being mounted on a carrier for longitudinal movement in one dimension of the panel, and the carrier being mounted for movement parallel to the other dimension of the panel. The grooving indexer comprises a series of stops adjustable longitudinally of the bar and a pivotal lever on the carriage biased into engagement with the stops to prevent longitudinal movement of the bar unless the lever is tripped.

Abstract: A window putty removal apparatus is provided which can be conveniently utilized with various window sizes and configurations without the necessity of removing the window sash from its frame. The apparatus includes an elongated flexible guide strip of variable effective length so that it can be applied to the stiles and muntins of different sized windows without removing the windows and a plurality of manual fasteners for securing the guide strip to the window sash adjacent to a strip of putty to be removed. The apparatus also includes a cutting member having a cutter mounted on a shank driven by a rotary power tool and an adapter element rotatably mounted on the shank and cooperable with the guide strip for guiding the cutter through the strip of putty as the power tool is moved longitudinally relative to the guide strip to remove the putty from the window.