US1522420A - Woodworking machine - Google Patents

Description

Jan. 6, 1925. 1,522,420

. 'H. H. CRAWFORD WOODWORKING MACHINE Filed Oct 17, 1922 6 Sheets-Sheet 1 gwuewkoz Wax /91 i Jan. 9

H. H. CRAWFORD WOODWORKING MACHINE 6 Sheets-Sheet 2 Filed Oct. 17, 1922 gmww 67 4251172 Jan. 1925- 1,522,420

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H. H. CRAWFORD WOODWORKING MACHINE Filed Oct. 17, 1922 6 Sheets-Sheet 4 gwumdo p Jan. 6,1925. 1,522,420

H. H. CRAWFORD WOODWORKING MACHINE Patented Jan. 6, 1925.

UNITED STATES PATENT OFFICE.

-- WOODWOZRKING MACHINE.

Application filed. October 17, Serial No. 595,079.

To all whom it may concern:

Be it known that I, HEZEKIAH H. CRAW- roan, a citizen of'the United States, residing at El Paso, in the county of El Paso and State of Texas, have invented a new and useful lVo-odworking Machine, of which the following is a specification.

This invention relates to woodworking machines and has for its object the provision of a machine combining the necessary units for completing the operations usually encountered in a carpenter shop. It is further the object of the invention to provide a machine simple and rigid in construction, easily and quickly adjusted and being of light weight to render it readily portable from one job to another.

With these and other objects in view which will appear as the description proceeds the invention resides in the novel arrangement and combination of parts hereinafter pointed out and particularly claimed, it being understood that slight changes may be made in the precise embodiment of the invention without departing from the spirit of the invention or sacrificing any of the advantages thereof.

In the drawing Figure 1 is a plan view of the machine.

Figure 2 is a plan view of the movable table and associate parts, the same being shown partly in section and partly in elevation.

Figure 3 is a plan view of the lower table.

Figure 1 is a central longitudinal sectional elevation.

Figure 5 is a longitudinal section taken on line 55 of Figure 2.

Figure 6 is an end elevation of the machine parts being broken away.

Figure 7 is a detail section taken on line 7-7 of Figure 2.

Figure 8 is a detail section taken on line 88 of Figure 2.

Figure 9 is a detail section taken on line 99 of Figure 4, and

Figure 10 is a detail view in elevation of a portion of the machine.

Referring to the drawing it will be seen the machine includes an upper table 10 and a lower table 11, said tables being spaced from each other by means of corner posts 12.

Legs 13 support the machine above the floor.

The posts 12 extend through ears 14; formed on the corners of the table 11 and project into the legs 13, the same being tubular to accommodate the projecting end of the posts.

A frame 15 is mounted for vertical movement between the upper and lower tables, the frame being of skeleton formation and having ears 16 formed at its corners, the ears being mounted for sliding movement on the corner posts 12. A gear rack 17 is secured to each of the ears 16 and moves in a slot 18 formed in the corner post. Gears 19 engage each of the rack bars 17 the gears being mounted on longitudinally extended shafts 20 which are mounted for rotation in the lower table. A transverse shaft 21 is also mounted on the table 11 and has an operating handle 22 at one end thereof. l/Vorm-gears 23 rotatable with the shaft 21 are meshed with worm wheels 24: carried by the longitudinal shafts 20. Manipulation of the crank handle 22 will raise or lower the movable table through the gearing just described.

The various cutting attachments are mounted on the frame 15 and are brought into operative position through the instrumentality of the raising and lowering mechanism above described.

The frame 15 is provided at one end with a bracket extension 25, which supports a portion of the power transmitting mechanism. Depending plates 26 are formed on the frame 15 and support a motor 27 conventionally illustrated in the accompanying drawing, it being understood that a motor of any other type may be used.

The motor is provided with an elongated shaft 28 which has secured to its upper end a friction wheel 29. A shaft 30 mounted for rotation in the frame 15 and extension 25, has secured thereto at opposite sides of the friction wheel 29, small friction wheels 31. A collar 32 is mounted on the end of the shaft 30 outside the extension 25 and is connected to a lever 33 pivoted at 34. A rod 35 is connected to the free end of the lever 33 and extends to the opposite end of the frame where it may be manipulated by an operator to move one or the other of the wheels 31 into engagement with the power wheel 29 and thus obtain forward or reverse motion of the shaft 30.

The shaft 30 has a key way 36 formed therein. and is thus splined asshown at 37 to a tubular shaft 38, this connection permits longitudinal movement of the shaft 38, on the shaft 30 and at the same time rotary motion of the shaft 30 is transmitted to the shaft 38.

A sleeve 39 mounted on the frame 15 in axial alignment with-the shaft 38 is adapted to be rotated on. bearings at its opposite ends for the purpose of adjusting a group of cutting tools, carried thereby, to any desired angular relation with the work table 10. An indexf40 inscribed on the frame 15 is provided, whereby an operator may set the sleeve to any angular position desired. A handle 41is secured to the sleeve for manipulation ofthe same.

.A block 42 having lugs 43 projecting from opposite sides thereof is slidably mounted within the sleeve 39. The lugs project-through elongated slots 44 formed in the member 39 provide bearings for a shaft 45 which extends through the block and lugs. The shaft 45 carries at one end a saw 46 and a shaping tool 47 at the other end. A gear "48 on the shaft 45 meshes with a gear 49 on the end of the shaft 38. A gear 50 also meshes with the gear 48 the gear 50 being secured to a shaft 51 which operates the boring bit of a mortising chisel 52.

The shaft 38 is mounted at one endin a bearing 53 which is secured to a cross head 54,the same being provided with terminal slides which operate in a guide way 55. Chains '56 are secured-to the cross head, extend rearwardly over guide sprockets 57 and are'secured to sprockets 58 on a shaft 59. A drum 60 carried by the shaft 59 has a rope 61 coiled thereon, the free end of the rope being connected to a foot lever 62. Spring sash lifts 63 are secured to the frame, the tape 64 thereof being connected to the cross head to return the parts to normal pos tion. Pressure on the foot lever 62 rotates the sprockets 58, winding the chain 56 thereon and moving the crosshead forward in its guides, the block 42 being thus moved forward in themember 39 and causing the mortlsin-g chisel 52 to project through the open end of the tube 39 in position for the operation of m-ortising. Movement of the saw 46 andcutting head 47 is accomplished in 'the'same manner.

'Mounted in bearings at one-side of the frame 1s a jointer and planer head 65, and at the opposite side of the frame a sa-nde'r'drum66 is'similarly mounted. Since. thefmeans 'for rotating the planer and the sander rare alike, as is also the means for feeding material to these two members, it

is thought a description of the drive means connected to one of said members will suffice for an understanding of the machine.

A shaft 67 carrying a friction wheel 68 is mounted for rotation in the extension 25, the wheel being adapted to receive power from the wheel 29. A sleeve 69 secured to the frame'receives 'onegend of the shaft 67 and a spring 70 is interposed between the end of the-shaft and a screw plug 71, any desired pressure may in this way be ob tained between the friction wheels 29 and 68. A gear wheel 72 is splined on the shaft 67 and a flexible drive element 73, preferably a well known silent chain belt, is trained over the gear 72 and over a gear74 onus shaft of the respective tool.

Feed ,and pressure rollers 75 and 76 respectively are located on opposite sides of the planer and sander, the said rolls being mounted for rotation in a swinging frame comprisinga shield 77 and arms 7 8 pr'ojecting from oppositeefn'ds of the shield, the arms being pivotally 'connected tothe frame 15 at 9. Springs 80 exert do'wnwardpressure on the arms to hold the rolls into engagement with the work. A gear 81'secured I to the feed roll 75 meshes with a gear 82 mounted on a shaft 83, the same being inclined downwardly and toward one end of the frame, the lower end being supported in a bearing 84 which is pivotally mounted at 85 on the depending plate 26, the purpose of this mountingwill presently appear. a

A shaft 86 transversely extended, is mounted the block and has "splined thereto a worin'gear 87 which meshes with a want wheel .88 also housed in the block 84. One end of the shaft 86 carries a friction wheel 89 whch engages the face of a friction disk 90 on the lower end ofthe motor shaft 28. ifhe other end :ofthe shaft 86 is col'ine'cted by a pin and circumferential slot 91 to a screw plug 92. By moving the wheel 89 along the face of the disk 90 by means of the plug 92, greater or .less speed of the feeding roll-s may be obtained. A slight oscillation of the bearing 84 on its pivotal connection 85 causes the friction wheel 89 to engage and .to .disengagethe power disk 90. Universal'joints 93 are provided on the shaft 83 to compensate for the swinging movement of the feed rolls75. The roll 76 is driven from the roll '75 by means of a chain and sprocket'conneotion 94. The lower table 11 comprises twofdistinct work supporting surfaces '95 and .96, each having perforations 97 to 'permit saw dust and planings to fall through and each provided'with a series ofroller's98 to support 1 the workbeing operated on and to promote easy movement thereof through the machine. A H I As hereinbefore statedthe table 15 carrying the operating toolsis moved upwardly or downwardly to engage the work to be operated on, for instance should it be desired to plane a board and sand the same, the handle 22 will be manipulated to lower the frame until the planer head or sander drum 66, as the case may be, is moved into engagement with work resting on the rollers 98.

On the other hand if an operator desires to joint the edge of a board the frame 15 will be elevated to move the cutter 65 through the opening 99 in the top of the table 10 the proper distance and the board then passed over the cutter, an auxiliary ta ble 100 carried by the frame 15 being so located as to support the edge of the board after being operated on by the cutter. The said table moves through the opening 99 when the cutter is elevated.

The saw 46 and shaper 47 are likewise moved through an opening 101 in the table 10 when the same are to be used.

A guide 102 may be adjusted on the table 10 to assist in properly directing work to the several attachments.

Having thus described the invention, what is claimed is:

1. A device of the class described comprising an upper table; a lower table; a frame vertically movable between the upper table and the lower table, a tool mounted on the frame and adapted to operate on material on either the upper table or the lower table, drive mechanism for the tool including interengaging friction wheels, spring actuated means for advancing one of the wheels into engagement with the other wheel and mechanism for adjusting the spring, means to establish driving engagement between the Wheels said mechanism providing adjustment for releasing the driving engagement between the wheels.

2. A device of the class described comprising a frame, a cylindrical housing mounted for rotary axial adjustment on the frame, an index on the frame and coacting with the housing to indicate the degree of angular adjustment of housing with respect to the frame, the housing having longitudinal guide slots, a block mounted for reciprocating movement in the housing, ears on the block for engagement with the guide slots, a tool carried by the block, means for rotating the tool and means for advancing and retracting the block within the housing.

3. In a device of the class described a frame, a cylindrical member mounted for rotary adjustment on the frame, the said member having longitudinal guide slots, a block mounted for reciprocatory movement in the cylindrical member, the block being provided with projections slidable in the guide slots, tools journaled for rotation in the said projections and means enclosed by the block for imparting motion to the tools.

4. In a device of the class described a frame, a cylindrical member mounted on the frame, a block mounted for reciprocatory movement in the said member, a shaft mounted for rotary movement in the block and extending transversely of the block, a second shaft mounted longitudinally of the block, the first and second mentioned shafts each being provided with a tool, a third shaft mounted longitudinally of the block, the third shaft constituting a drive shaft, and gearing connecting the first, second drive shafts whereby the tools are simultaneously rotated, the gearing being housed by the block, and means for efiecting rotary axial adjustment of the cylindrical member with respect to the frame.

5. In a device of the class described a frame, a cylindrical member mounted for rotary adjustment on the frame, a tool mounted for reciprocatory movement in the said member, a cross head also mounted for reciprocatory movement on the frame, a flexible member connected to the cross head, a drum mounted for rotation on the frame, means for rotating the drum, the flexible element coacting with the drum to move the cross head in one direction, spring actuated means for moving the cross head in the other direction, and indices carried by the frame and the cylindrical member for establishing angular relation between the frame and the tool.

6. A device of the class described comprising an upper table, a lower table, a frame mounted for vertical adjustment between the upper table and the lower table, a tool carried by the frame, means for adjusting the frame to cause the tool to engage material on either the upper table or the lower table, a prime mover on the frame, means for driving the tool from the prime mover, and feeding mechanism comprising a housing pivoted to the frame, a feed roller carried by the housing, the housing and the feed roller being mounted over the lower table for vertical movement to permit material of varying thickness to pass under the roller and a drive shaft connecting the prime mover and the feed roller, said shaft being extensible to permit swinging movement of the feed roller.

7. A device of the class described comprising an upper table, a lower table, a frame mounted for vertical adjustment between the upper table and the lower table, a tool carried by the frame, means for adjusting the frame to cause the tool to engage material on either the upper table or the lower table, a prime mover on the frame, means for driving the tool from the prime mover, feeding mechanism comprising a housing pivoted to the frame, a feed roller carried by the housing, the housing and the feed roller being mounted over the lo er 4e Mam table for vertical movement to permit ma- In testimony that I claim theio 'egoinges ter'ial of varying thickness to pass under the my own, I have hereto eflixed my signature roller and a drive shaft connecting the in the presence of two Witnesses.

prime mover and the feed roller, said shaft HEZEKIAH H. CRAWFORD. 5 being extensible to permit swinging move- Witnesses:

ment of the feed roller, and means for aci- M. M. MCCLURE,

justing the speed 01"- the feed roller. BERTHA N. DAVIS.

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