US 1874232 A
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Description (OCR text may contain errors)
w. F. GROENE ET AL 1,374,232
nounue DEVICE Aug. 30, 1932.
Filed Nov. 15. 9 2 Sheets-Sheet 2 3/ I In 34 amnion M 1mm Crmene Les/1'6 D. Reed Patented Aug. 30, 1932 UNITED STATES PATENT GFFECE WILLIAM F. GROENE, OF CINCINNATI, AND LESLIE D. REED, OF MARIEMONT, OHIO, ASSIGNORS TO THE CINCNNATI ELECTRICAL TOOL COMPANY, OF CINCINNATI, OHIO,
A CORPORATION OF OHIO L ROUTING DEVICE Application filed November 15, 1927. Serial No. 233,501.
i routing tool.
Another object is to provide a machine of this type which is especially adapted for facile operation and accuracy in guiding it over a pattern plate.
Another object is to provide a simply adj usted and readily reversible pattern plate for use with routing machines.
These and other ob ects are attained by the means described herein and disclosed in the 1 accompanying drawings, in Wl11Cl1I- Fig. 1 is a perspective iew of a routing machine of the invention having embodied therein the novel cut depth adyustinent means i r and the means for manipulating the device 29 of the invention.
Fig. 2 is a fragmental view of the reverse side of the device shown in Fig. 1.
Fig. 3 is a cross sectional view taken on line 3-3 of Fig. 1.
Fig. 4 is a fragmental view of a part of the structure shown in Fig. 1 disposed in position for effecting a setting of the cut depth of the routing tool.
Fig. 5 is a plan view of a reversible guide plate structure of the invention in operative, position upon a piece of Work.
Fig. 6 is a view taken on line 66 of Fig.
Fig. 7 is a view taken on line 77 of Fig.
Fig. 8 is a View taken on line 88 of Fig.
Fig. 9 is a view similar to Fig. 8, showing a holding means for the guide plate in reversed position.
The device comprises a suitable driving unit 12 which preferably takes the form of a vertical electric motor having a housing 13 adapted to be vertically adjusted and clamped in a receiver frame 14 supported in spaced relation to a centrally apertured base 15 by suitably spaced legs 16. A clamp for the motor housing 13 is conveniently formed by splitting or slotting through the receiver 14 as indicated at 17 and providing perforate and suitably threaded lugs 18 on each side of the slot. A clamping screw 19 extends through the bosses and serves to T UK or draw the receiver body into clamping relation about the housing 13. On the side of the receiver frame 14 opposite the clamping lugs 18 is a preferably integral boss 20 which is disposed substantially at right angles to the shaft and motor 12. The boss 20 has a bore 21 adapted to receive a shaft 22 having an annular recess 23 intermediate its ends and which is furthermore provided adjacent one end with the pinion 24 which meshes with a rack 25 suitably secured to the motor housing 13. The extreme end 26 of shaft 21 has a reduced portion thereon which is journaled in a reduced bore 27 co-aXial and communicating with the bore 21. At its opposite end the boss 20 has an enlarged counter-bore 28 for receiving a fixed stop pin 29 which is threadedly mounted in the body of the boss 20. Set screw 30 projects through the wall of the boss 20 into the annular groove 23 and precludes displacement of the shaft 21, thereby insuring accurate meshing of pinion 24 with the rack 25. A collar 31 is rotatably mounted on the shaft 21 and has its innermost face 32 riding in substantial abutment with the end face 33 of lug 20 and carries about its circumference suitable scale markings 34 any of which may be brought into matching alignment with line 35 on the adj acent end of the boss 20. A pin 36 on the face 32 of the collar 31 projects into the counterbore 28 in the boss and is adapted to abut the stop pin 29. A handle knob 37 is splined on the outer end of shaft 21 so that it is always in driving engagement with it but may be retracted away from the collar 31 by pulling it outwardly against the resistance of spring 38 which normally holds the knob against said collar. The collar and knob are provided on their abutting faces with intermeshing teeth 39 and 40 so that under normal con ditions the knob and collar may be rotated as a unit for raising and lowering the housing 13 and thus raising and lowering the routing tool 41 which is suitably received in a chuck or clamping collar 42 on the lower end of the motor shaft. From the foregoing description it will be noted that knob 37 may be rotated, carrying with it the collar 31 to bring the pin 36 into abutment with the stop pin 29 to a limit of depth feed. Withdrawal of the stop pin 29 will permit continued descending movement upon turning.
of knob 37. The stop pin may then be projected into position. The knob 37 is then withdrawn sufficiently to release the collar 31 which may then be manually rotated without disturbing the adjustment of the motor housing and routing tool in order to align the zero mark on the collar (indicated by an following manner. The various routing tools are often of different lengths so that the initial'contact with the surface of the work will normally register differently on the indicat- The knob is then released by withdrawing it ingmeans. To effect a predetermined cut of a given tool, the tool is nserted and lowered to touch the work by turning the knob 37.
and collar 31 is turned to zero. The knob is again permitted to engage the collarwhereupon the two as a unit are turned the desired number of markings (which conveniently represent 1/16 of depth cut) whereupon the clamping lever is actuated and the tool is accurately held to a predetermined depth of cut for the given routing bit. From the foregoing it will be noted that by resting the bottom face of routing tools, which may be ofdifferent lengths, upon a surface to be worked upon it is possible to rapidly attain an actual zero position for the routing tool and to then immediately adjust the collar 31 to a zero position from which the depth of the cut may be obtained by'turning the knob 37, theexact depth being indicated by the number of markings from the arrow mark or zero mark 340 on the collar and the mark 35 on the boss. It will be understood that the depth of cut of the routing tool is measured perpendicularly downwardly from the plane of the bottom face of base 15. As shown in r Fig. 1 the device isprovided with a handle member 43 which is disposed in a substantial- 1y horizontal plane spaced suficlently above the base 15 to enable the operator to grasp.
' and manipulate the device over a piece of order to permit an operator to use the device to best advantage the handle member 43 is made polygonal for the purpose of prevents ing accidental slippage of the handle in the.
1,874,232 I f; ,l f j V i hands of an operator as sometimes occurs when the hands or the handle become greasy. A suitable connector box 46 conveniently carried by the side of the receiver 14 has a switch 47 associated therewith for controlling electric current supply from a suitable flexible conductor 48 to the motor 12.
As will be noted in Fig. 1 the routing tool 41 has an accurately machined'cylindrical guide bearing 49 having a narrow flange 50 at p the top thereof providing a right-angled shoulder. This guide bearing co-operates with a suitable pattern plate or t'emplet for efi'e'cting the desired linear movement of the routing tool.
What is claimed is: V V
1. In a device of the class described the combination of a vertical power means, a receiver adapted to clamp the power means in Vertically adjusted positions, means on the receiver and power means for effecting said adjustment, a shaft for actuating the adj ustment, a knob on the shaft and a collar, having peripheral markings, normally movable with the knob and capable of movement independently thereof for resetting the collar while the power meansremains clamped in ad justed position. Y
2. In a device of the class described the combination of a receiver, a motor housing received therein, means to clamp said housing in the receiver, a rack and pinion means on th receiverand housing, a shaft journaled in the receiver for actuating the pinion, an indicating collar rotatably mounted on'the shaft and a handle member for turning the shaft and having a normally locking engagement with the collar, said locking engagement being disconnectible for setting the collar independently of the adjusting means.
3. In a power driven portable router device the combination of' a receiver frame, a power unit vertically adjustable therein, a vertical rack on the power unit, shaft and pinion means housed int-he receiver, the pinion extending through the receiver and meshing with the rack on the power unit, a collar rotatably mounted on the shaft exteriorly-of the receiver and having graduations thereon, the receiver also having a mark thereon adapted to be matched with .the
markings on the collar, a turning knob