US2320743A - Crosscut saw - Google Patents

Description

N. NILSEN CROSS CUT SAW June 1, 1943. r

" Filed June 5, 1941 s sneetssheet 1 VInventors -A tra r11 ey June 11943. N, MLSEN l 2,320,743

I' -cRoss CUT sAw Filed June 5, 1941 3 Sheets-Sheet2 /VMULA/ /V/LsE/v Lf'y, 2, EUR VA L .D i?. (me/5 TOF/f5 @s 0N,

Inventors Junel, 1943. 'y NNILSEN V Y2,320,743

cRoss CUT sAw Filed June V3, 1941 3 Sheets-Sheet 3 Patented June 1, 1943 UNiTi-:n sTATEsf- PATE Nicolai Nilsen, Wallacaand-Thorvald R. 'I Christofferson, Gem, Idaho Application YJuno 3,1941, serial No. 396,450; i v LLt Claims. (el. 143-46)` The present invention relates to new andl use- .ful improvements in cross cut saws and has for one ofl its important objects tovprovide, ina mancharacter comprising a power driven circular saw 'justing screw' 5'. The'lowe'r portion ofthe cap 4 u is in lthe form of a vertically split clamp which is kprovided withsuitable means l' for frictionally .ner'as hereinafter set forth, a machine-.of vthis which is adapted to Swingin a truer horizontal plane. v t .v

Another very important object of the invention is to provide a cross cut saw machine of the aforementioned character comprising a novel vsecuring said cap in adjusted Y Y position against rotation on the post l.' l Y Fixed on the lower portionof the. front of the sleeve 4, ask at 8, vand depending therefrom is a f worm segment 9. Mountedon the lowerportion of the segment 9 is. ja gui'dejlllf which is slidable constructionand arrangement whereby substantially any desired adjustment of the saw may be Vexpeditiously made for performing different kinds of work. Y n Y t Y Other objects of the'invention are `to provide a cross cut saw machine of the character described which will be comparatively simple in construction, strong, durable, h ighly efficient and on the p'ost I. Pivotally mounted'on'the lower portion of thestationary worm segment 9 is a swinging segment I ofl suitablefirietal;A fThe upper portion ofthe swinging'vrsegment I0 is formed Y `to, provide a housing II of angular cross-section in which the segment 9 `is engaged. The housing l'I.r includesa raised portion' I`2 in which a worm i gear I3 on one Aend portion of a hand actuated reliable in use, compact, light in Vweight and which may be manufactured at low cost.

All of the foregoing and still further objects and advantages ofthe invention will become ap- Y parent from a study of the followingspecification, taken in connection with the accompanying drawings wherein like characters of reference designate corresponding parts throughout the several views, and wherein:

Figure 5 is a vertical sectional view, taken substantially on the line 5-5 of Figure 4.

Figure 6 is a view in horizontal section, taken substantially on the lin'e 6-6 of Figure 4.

Figure 7 is a detail view in perspective of the slide to which thelguard leveling link is connected.

Figure 8 is a detail view in cross-section, taken substantially on the line 8 8 of Figure 3.

Referring now to the drawings in detail, it will be seen that the embodiment of the invention which has been illustrated comprises a post I which is rigidly secured in any suitable manner, as at 2, on the back' of a table 3. Slidably and rotatably mounted on the upper end portion of the post I is anv elongated, tubular metallic cap 4. Rotatably mounted in the closed upper end of the cap 4 is a vertical adjusting yscrew 5 which 'is threadedly engaged in a bore provided therefor in the upper end portion of the post I. A suitable operating handle 6 is provided for the adshaft I4 is journaled,v said wormY gearf|3 being in mesh with and adapted to travel on the worm segment 9 for swingingthe pivoted segment l0 in a vertical plane from side to side.

Rigidly mountedn the swinging segment I0 and projecting horizontally therefrom isa substantially U-shaped frame I5 vof angle irc... Mounted Yon the free endportions of the legs of the .U-shaped' frame I5 are uprights I6 'of suit- Aable metal. The uprights I6 have rformed'thereln at intermediate points vertical slots I1 which accommodate bolts I8 whereby said uprights are secured for vertical adjustment on the frame I5.

The uprights I6 are further provided, in their upper portions, with vertical slots I9 the of which will be presently set forth.

Pivotally-mountedon the lower end portions of the uprights I6 for Vswinging movement in a purpose vertical plane are links 20. The links 2U have one end portion pivotally secured to bosses or the likel 2| (see Figures 2 and 3) which project from an intermediate portion of a beam'22. end portion of the beam 22 is journaled on a rod 23 which has its end portions slidably secured inr f drawings, an eccentric 25 is mounted for rotary adjustmenton the rod 23 and secured by a set screw 2G.v Journaled on'the eccentric 25 is a dou- A ble pulley 2l. An endlessgbelt 28 drives the saw 24 from the pulley 2l.` By rotatably adjusting the eccentric 25 on the rod 23 the tension of the belt 28 may be regulated as desired.

Pi'votally mounted forl rocking adjustment on the frame I5 isa motor base 29. Mounted o'nthe basey 29 is a suitable electric motor 30. A belt 3| cRosscU'rsAw A v a..

'I'he upper Y from the motor 30 drives the pulley 21. A coil spring 32 is connectedtotheswinging motor base 29v for maintainlngthe belt 3| at ,the desired ten-4 'sion atall times. It willlthusY be' seen that the saw 24 is .operatively'connected to the electric motor 30.

Fixed on oneend portion of the rod 23 is a bracket'33which.isislidableon the adjacent upright IG.- The bracket 33 includes projections 34 (Fig. 7) whichpreceivei the 1 adjacent `uprights I6' therebetween forfsecuring therod 23 against frame Isis a .bracketed Pivv otally mounted on the bracket 38 is a. vclamp 39 one end of which is engaged with thetoothedv stationary segment 9. Threadedly mounted in the other end portion of the clamp 33 is a hand screw 40 which is engagedwith the framel5 for actuating said clamp. The clamp 39 is adapted to engage the segment 3 for securing the frame I5 in adjustedV position. U

It is thought that the operation of the machine will be readily apparent'from a consideration of the -foregoing.A "Brieiiy, the electric motor 30 which, of course',` may receive current from any suitable source, drives theV saw 24 through the H, belt and pulley connections3l and 28., The work is placed on the table 3 'and the saw 24 is swung thereacros's, The mounting oi the beam 22 on the uprights i6 is such-as to cause the `saw 24 to travel ina true horizontal plane back and forth across the table. Throughthe medium of the worm I3' traveling on the rsegment 9 the frame l5`may be conveniently tilted for adjusting the saw 24 to any inclination. By rotating the entire assembly on the post l the saw 24 may be expeditiously positioned to move acrossthe work vat any desiredangle. Then, the screw 5 facilitates vertical adjustment of the entire assembly on the post I. From the foregoing it will be seen that the saw v24 is capable of substantially universal adjustment. Thus, various kindsv of work may be rapidly and accurately performed. l

Further, a dado may, if desired, be substituted for the saw.24.

It is believed that the many advantages of a saw machine constructed in accordance with the present invention will be readily understood and although a preferred embodiment of the device is as illustrated and described, it is to be understood that changes in the details of construction and in the combination and arrangement ofparts may be resorted to which will fall within the scope of the invention as claimed.

What is claimed is:

1. A saw machineof the character described including a post, a segmental gear mounted for vertical adjustment on said post, means for adjusting the gear, a member pivotally mounted for'swinging adjustment onV said gear, a rframe fixed on said member, a circular saw mounted' on said frame, means for actuating the saw, a manually operable worm gear rotatably mounted on the member and engaged with the first-named gear foi adjusting said member, a bracket mounted on the frame, a clamp pivotally mounted on said bracket and engagedwithjthe iirst-named gear, and a hand screw threaddly mounted on one end portion of the clamp and engaged with the-frame, said screw constituting means for 'A securing the clampagainst the'iirst-named gear.

2. A saw machine of the character described comprising a supporting structure including a on one ofrthe'uprights, a swinging beam mounted on'the rod, a rotary saw mounted on said beam,

means for actuating the saw, Va rguard for the saw rockably mounted onthe beam, a link connecting the'guard to the bracket for rocking said guard upon swinging movement of the beam,

and a pair of links pivotally connected to the beamV and the uprights.Y

' VNICOLAI NILSEN'.`

THORVALD R. CHRISTOFFERSON.

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