US1775430A

US1775430A - Wood-grooving machine

Info

Publication number: US1775430A
Application number: US411297A
Authority: US
Inventors: Hibbs Russell Rust
Original assignee: Individual
Current assignee: Individual
Priority date: 1929-12-03
Filing date: 1929-12-03
Publication date: 1930-09-09
Anticipated expiration: 1947-09-09

Description

p 1930- R. R. HIBBS v 1,775,430

WOOD GROOVING MACHINE Filed Dec. 3, 1929 2 ShGOtS-ShGGC 1 In venior a Emma/LE fljjw A ttbmcy Sept. 9, 1930.

R. R. HIBBS WOOD GROOVING MACHINE Filed Dec. 5, 1929 2 Sheets-Sheet 2 In vcntor Emma Z2. 5%,

A ttorney Patented Sept. 9,1930

UNITED sir-Ares PATENTOFFICE .1 i

RUSSELL nusr'nnsns, or CAPEemannnauiivrrssoom woon-Gaoovm MACHINE 7 Application filed December a, 1929. jserial ivbgumsv.

This invention relates to wood grooving machines and more particularly to devices of this character of the portable type. M

An important object of the invention is to 5 provide, in a manner as hereinafter set forth,

a wood grooving machine of the aforementionedgcharacter which includes an electric motor which is mountedthereon in a manner to drive the bit or other cutting tool when 10 the device is in use.

Another important object ofthe invention is to provide a wood grooving machine of the character setforth wherein means is pro: vided for expeditiously'adjusting the out ting bit for: regulating the depth of the groove to be cut and wherein the electric motor is associated withthe bit supporting means in sucha way as to be shifted simultaneously therewith. j l v j Other objects of theinvention are to provide a wood groovinglmachine of the character set forth which will be simplein 0011- struction, strong, durable; eflicient in its use and which. may be manufactured at low cost. Other objects and advantages of the invention will become apparentfrom a study of the following specification, takenin connection with the acconipanying drawings, wherein like characters of reference designate corresponding parts throughout the several views, andwherein Figure 1 1s a view in s1de elevation of a wood grooving machine constructed 1n accordance with this invention.

Figure3 isa fragmentary view in'l o'ngitudinal vertical section SlIOWiHgthG'bIt adjusting and clamping means. I

Figure 4: is a detail vlew n perspective of 40 the bit supporting means and the motor in said base 2. i l

Figure 2 is a view in topplan thereof. 3

body portion of the machine which comprises i the base 2 and the vertically extending side 1

Walls

3 and 4. The sidewalls 3 a11d4; are

provided with an intermedia-te raised portion 5. As it will be seen the body portion l con stitutes a channel member of substantially u-shaped cross section. As seen most clearlyin Figure 3 of the drawings the sides 3 and Lof the body portion are provided with l i rearwardly andupwardly extending recesses 0v 6 and a portion of the base 2 isQdi'rectedjup wardly as at 7, and terminates attliejupper endof the recesses 6 to provi'de an'opening 1 A pair of inclined ribs 8 are oppositely disposed on theinner sideof thewalls 3 and l a and extend" upwardly and rearwardly thereon from the peripheraledges of the recesses 6. motor stand 9 (see Figure 4) is mounted in an inclined position between the side walls?) and 4 through the 'inedium of the chan nel 10 inits longitudinal side edges which slidably receive the ribs 8 for adjustably supporting said stand between said side wane. On one side, the motor stand-9 is provided with a laterally projecting bracket 11 which extends below the lower'fend of the motor stand and is bifurcated to provide a pair of ournal arms 12 for rotatably supporting the opposite end portions of abushing 13QA. to

sprocket 14 is rigidly mounted on the bush ing 13 at a point between the journal arms 12 as clearlyshown in Figure 4." The bushing 13 is provided with a longitudinal bore 15 for the reception of a disc supporting mandrell6 having a left hand screw threaded portion 17 onits free lend. Themandrel -16is provided with anintegral flange or collar 18 for abutment with the adj acent end of the bushing 13 which collar acts as a stop to limit the movementxof said mandrel through thebushing. On the opposite end of the bracket 11 a retaining nut 19 1s threaded on the projecting end of the mandrel 16 for rigidly mounting the same in the bushing.

A set screw 20 is threaded through the bushing 13 adjacent thesprocketli for engagement withthe adjacent portion of the mandrel 16 for further rigidly coupling said mandrel and bushing together. An integral lon gitudinally extending key or rib 21 is provided on the mandrel 16 for securing a grooving bit or other woodwork bit thereon in a manner to prevent relative rotary movement of said bit with respect to the mandrel and this key may extend into a complemental opening in the bushing 13 if it is desired to provide the same. The key receiving channel in the bushing 13 is designated by the reference character 22. If desired, the key 21 may be dispensed with and the mandrel 16 provided with a flat side and the bore 15 of the bushing 13 may also be provided with a flat side to conform to the cross sectional shape of the mandrel for rigidly securing said mandrel therein against rotation. A bit 23 is rigidly mounted on the mandrel 16 against rotation thereon and a nut is mounted on the threaded portion 17 for retaining the bit thereon.

It is understood, of course, that the bit 23 is provided with a bore having a groove in one side for thereception of the key 21 or if the mandrel 16 is provided with a flat side. the bore in the bit will be provided with a complementary flat side for keying the bit thereto.

The wall 4 is provided with a recess or slot 24 which merges into the recess 6 (see Figure 6) for accommodating the bracket 11. The mandrel 16 with the bit 23 mounted thereon is disposed in the recess provided in the body portion 1 by the recesses 6 and the upturned portion 7 of the base 2.

An electric motor 25 is mounted on the upper end of the stand 9 through the medium of the supporting plate or arm 26 and the securing screws 27 which extend therethrough and are threaded in the openings 28 in the upper end portion of said stand. The armature shaft 29 of the motor extends laterally therefrom and has mounted on its free end a sprocket 30. An endless driving chain 31 is trained over the sprocket and the sprocket 14 on the bushing 13.

The underside of the motor stand 9 is provided with a centrally disposed longitudinally extending dovetail groove 32 for slidably receiving a complemental block 33 having arearwardly extending arm 34 thereon provided with a transverse opening for rotatably receiving a horizontally disposed shaft 35 which has its opposite end portion journaled inthe bushings 36-36 in the

side walls

3 and 4. At a point adjacent the inner faces of the

side walls

3 and 4 the shaft 35 has rigidly mounted thereon a pair of pinion gears 38-37 which mesh with a pair of rack bars 37 formed integrally with the lower side of the motor stand 9 and at the opposite side portion thereof. A set screw 38 is threaded into the rear end of the arm 34 for engagement with the shaft 35 for securing the same against rotation when desired and said set screw is provided with a hand wheel or disc 39 at its free end.

A bridge piece 40 spans the

side walls

3 and 4 and is secured thereto through the down turned end flanges 41 for the passage of securing elements such as rivets 42. The bridge piece 40 is provided with a down turned forward portion 43 on which is formed an integral internally threaded sleeve 44 for threadedly receiving a pressure screw 45 provided, at its upper end, with a hand wheel 46. A pressure plate 47 is engaged on the lower end portion of the motor stand 9 and has its opposite end provided with recesses for the reception of the guide ribs 48 for adjustahly mounting said pressure plate on the

side walls

3 and 4. The pressure plate 47 has rigidly mounted on its upper side a comparatively small plate 49 which is provided with a lon ,cgitudinal groove 50 in its upper face for the reception of the adjacent end of the pressure screw 45.

A laterally adjustable longitudinally extending gage 51 is mounted on the body portion 1 of the machine through the medium of the rods 5252 which extend through transverse bores provided in the sleeve formed on the base 2and extending between the side walls 3 and-4. Set screws 5454 are threaded into the sleeves 53 for engagement with the rods 52 for maintaining the in adjusted position. The gauge 51 is provided with a recess 55 for accommodating the bracket 11 when said gauge is moved Close to the side wall 4.

An upstanding handle 56 is mounted centrally between the

side walls

3 and 4 on the base 2 adjacentthe rear ends thereof and is provided, on its upper end, with a suitable electric switch 57 for controlling the flow of electric current to the motor 25 through the conductor wires 58. course, that the wires 58 lead to a suitable source of current supply. Adjacent the forward end of the base 2 a hand knob 59 is rigidly mounted on said base. The reference character 60-60 denotes a pair of oil cups mounted on the bracket 11 for lubricating the bushing 13 at its opposite end portion.

The gauge 51 is the thickness of the wall 4- and is of greater width at its bottom to all. w the same to come flush with the inside of the body portion when making narrow cuts. recess 55 in the gauge 51 must be large enough to allow the chain and sprocket to operate without touching said gauge when the same is set for wide cuts.

In the use of the machine, with the parts assembled shown in'the drawings, the pressure screw 45 is backed off to relieve the pressure of the plate 47 on the motor stand 9 and the set screw 38 is. also disengaged from It is understood, of

tends through the side wall 3 as clearly seen in ,FigureQ, Rotation of the shaft 35 shifts the motor stand 9 in aninclined plane on the ribs 8 through the medium of the rack bars 37 and the pinion gears 37 which are rigidly mounted on the shaft, In this manner the Theset screwc38 prevents rotation of the shaft 85 and the pressure plate 47 in conjunction with the pressure screw maintains the motor stand 9 against vibration as Well as any other undesired'movement. It will further be seen that the motor 25will be moved simultaneously with the bit 23 by reason of the fact that it is mounted rigidly on the stand 9 and, of course,;sufiicient' slack is provided in the electric conductor which extends from said motor to the switch57 to permit this adjustment to be made Without breaking or straining said conductor;

Any suitable type of bit may be mounted on the mandrel 16 and the tool may be utilized to plane doorsof any thickness as well as for making moldings such as screen mould and window" stops or for rabbeting' door jambs. j r a It is believed that the many advantages of a wood grooving machine constructed in accordance with this invention will be readily understood, and although the preferred embodiment of the invention is as illustrated and described, it is to be understood that changes in the details of construction may be had which will fall within the scope of the invention as claimed.

What is claimed is 2+ 1. A wood grooving machine of the charing movement between the side walls, a bit rotatably supported on the lower end of the stand, a motor mounted on the stand, means driven by said motor to rotate thebit and a means for shifting the stand on the body portioncomprising rack bars formed integrally on the base and pinion gears in operative engagement with the rack bars and rotatably supported between the side walls.

2. A wood grooving machine of the character described comprising a body portion of substantially U-shaped cross section and including a base and vertical opposed side walls having horizontally aligned recesses in their lower portions, said base being pro vided with an opening communicating with the recesses in the side walls, an inclined stand-adjustably mounted on the side walls,

a bracket; projecting laterally" and down wardlvfrom 'saidfstand' adjacent the outer face ofone of the sidewalls and terminating in horizontal alignment with the recesses therein, a mandrel journaled in said bracket and extendinginto the recesses, a bit rigidly mounted on the mandrel, a motor on the up per end of the stand, means driven by said motor forrotating the bit and means mounted on the sidewalls for adjusting the stand in an inclined plane. i

A wood grooving machine of theflcharacter described comprising a 'body portion ofsubstantially ;U-shaped cross section and including base and vertical opposed side,

walls having horizontally aligned recesses in their lower "portlons, said base being providedwith an opening communicating with the recess in the side walls, an inclined stand adjustablymountedon the side walls,a bracket projecting laterally and downwardly from said stand adjacent the outer face of one of the side walls and terminating in horizontal alignment with the recesses therein, a mandrel j ournaled in said bracket and extending into the recesses, a bit rigidly mounted on the mandrel, a motor on the upperend of the stand, means driven by said motor for rotating the bit and means mounted on the side walls for ad usting the, stand in an inclined plane, said means comprising a shaft journaled for rotation, at its opposite end por tion, in the side walls, pinion gears rigidly mounted on said shaft for rotation therewith, rack bars mounted on the adjacent side of the stand in mesh with the pinion gears, said stand being further provided, on itslower side, with a longitudinally extending dovetail grove, a complemental block slidably disposed in the groove and having a rearwardly extending arm provided with an opening for rotatably receiving the rotating shaft and manually operable means for rotating the shaft.

4. A wood grooving machine of the character described comprising a body portion of substantially U-shaped cross section and including a base and vertical opposed side walls havinghorizontally aligned recesses in their lower portions, said base being provided with an opening communicating with the res cess in the side walls, an inclined stand adjustably mounted on the side walls, a bracket projecting laterally and downwardly from said stand adjacent the outer face of one of the side walls and terminating in horizontal;

alignment with the recesses therein, a man- 1 drel journaled in said bracket and extending into the recesses, a bit rigidly mounted on the V mandrel, a motor on the upper end of the i stand, means driven by said motor for rotating the bit and means mounted on the side walls for adjusting the stand in an inclined tion, in the side walls, pinion gears rigidly mounted on said shaft for rotation therewith, rack bars mounted on the adjacent side of the stand in mesh with the pinion gears, said stand being further provided, on its lower side, with a longitudinally extending dovetail groove, a complemental block slidably disposed in the groove and having a rearwardly extending arm provided with an opening for rotatably receiving the rotating shaft and manually operable means for rotating the shaft, means mounted on the block engageable with the shaft for retaining the same against rotation, apressure plate supported for movement in an inclined plane on the side walls on the opposite side of the stand, and a pressure screw supported on the body portion for clamping the pressure plate against the stand. In testimony whereof I afiix my signature.

RUSSELL RUST HIBBS.