US1735990A

US1735990A - Portable saw standard

Info

Publication number: US1735990A
Application number: US158524A
Authority: US
Inventors: Lewie L Belnap
Original assignee: Individual
Current assignee: Individual
Priority date: 1927-01-03
Filing date: 1927-01-03
Publication date: 1929-11-19
Anticipated expiration: 1946-11-19

Description

Nov. 19, 1929. i.. 1 BELNAP l PORTABLE SAW STANDARD 2 Sheets-Sheet Filed Jan.- 5, 1,927

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Filed Jan, 5, 1927 V 2 Sheets-.Sheet 2 a.. 3 x A Patented Nevyle, i929 LEwI-u 1...BELNAP, or OAKLAND, cALrroRNrA ,PORTABLE saw STANDARD Application filed January 3, 1S27. Serial No. 158,624.y I

" The present invention relates to improvements in wood working tools and has particular reference to a universal wood working tool such as described in my co-pending applica- 5 tion, Serial No. 67 ,719, filed November 9,1925. In ,the present invent-ion, it is proposed to provide theimprovementin connection with the Vstandardor supporting means for the arm of, the wood-working tool from which lthe saw is suspended, and it is particularly proposed in this connection to somewhat sim- ,plify the operation of the device. In its general features, my wood working tool `comprises a. mast supported in a mast housing lwhichstands back from the front edge of a bench. The mast oriwhich the tool arm is supported is mounted withfreedoni of vertical, as well as angular adjustment, and the means by which the adjustments are edected -are brought to the front edge ofthebench so that the operator need not walk around the Vtool in order to malte adjustments. In vthe `present invention, it is proposed to some- V{whatsimpliy the controls and to centrali'ze the same by reducing the number thereof. It

isfurther proposed to place the vital parts Vof the working mechanism for effecting controlon the inside of the mast housing so that theseA parts' are safe from injury due to t A 3@ improperhandlmg .or other causes while, at

the same time, lubrication may be applied in --a moreperfect manner. It is further proposed to provide certain improvements in the design which render the tools as a whole -easier. tomanipulate and safe to operate;

Further objects and advantages of the present inventionwill appear as the specification proceeds. 1

The preferred form of my'invention is .,.10illustrated in the accompanying drawing Figure 1 shows a side view of .the assembled supporting means for a wood working tool, the4 arm from= which the tool itself is supported being omitted.

Figure 2 vertical section thru the standard forming a part of the supporting means,

Figure 3 a vertical section along line 3-3 -of Figure 1, rand f `Q Figure .4 ahorizontal section takenalong 'une 4 4 or Figuren, Slightly fenced-'indi scale. j

While I have shown only the preferred :form of the reinvention, I wish to have it understood that various changes ormodifica- I tions may be made within thev scope o f the claims hereto attached without departing 1 from the spirit ofthe invention. f

Referring to the drawing in detail, it will be seen that the masthousing 1 is supported go vrelative to the bench 2 at a distance from the front edge 3 thereof by ,means of a flange 4 resting on the bench and ksecured thereto by bolts 6. It will bev notedthat a considerable section of the housing extends lbelow 55 'Y the bench. v

Referring now .particularly-A to 'Figure-2 i it will be noted that inthehousi11g, sub' stantiallyat the elevation of the flange il,

,there is provided. a, ange 7, into ,Whchgis @tu threaded ak nut 8 vaccommodating a bearing 9 .which bearing is held in place by meansof a second nut 11 threaded, into vthe lower end of the first nut. Fromthe bearing is suspended, by-'means of a collar 12, the longsleeve v`7,45

13 extending substantially throughout jthe Alength ofthe housing and threaded in the upgear 16 forms part ofa bushing21 fixed rel- 8,5 ativeto the sleeve by means of screws 2 2 and spaced from the bearing 9 by a spacing member 23. Y The mast 2tis supported in the uppersection 26 of the housing in such a manner that .19o

the mast may be raisedforlowered by a' turning movement of the sleeve 13. The latter threadably `engages with a nut 27 threaded into a 'plate 28 on which vlatter rests an internal Harige 29 of the mast, the said flangebeing 95 secured to the plate 28 by, means ofbolts 31.

It will be noted'that this arrangement/causes the mast to move axially when the sleeve 13 is revolved, provided the mast itself is, held against revolving-motion. H5 A 1 00 Inside of the sleeve 13 there is provided a shaft 32 which extends above and below the sleeve and is provided below the sleeve with a clutch element 33 `slidable thereon, but held against revolving motionV byV keys 34 running in key ways 36. This' clutch element is provided with jaws 37 adapted to mesh with corresponding aws 38 on the worin gear 16 when theclutch element is lifted by means of-l a'yoke39 pivoted on the shaft 41.'l The latter shaft extends thru Vthe wall ofthe housing and has a bell crank lever 42 fixed thereto, one arm 43 of the lever being acted on by a spring f 44 which normally holds the clutch element (away. from Vthe worm gear. yThe longer arm '4'6 ofthe lever is connected by means of a vertical l rod 47 to an arm 48 of a second; lever v49 'pivoted'to the housing as lshown at '50. A

"second arm 51 of 'this lever is connected to a horizontal rod 52 extending forwardly thruo'u't `Vthe lwidthl of the Vbench I'and terminating ina shaft 53 slidably nlountedvin a face plate y54 secured to'thevfron't edge of the bench by nieans of screws 56. [When theV shaft 53 is pulled forward by means of a handle 57', a latch 58 drops by its own weight into an an` l'nulai' 'groove'gaprovided inthe shaft for lockingv the latter against rearward motion. Itwi'llvbe 'noted that when the shaft 543v is pulled forward, the rod 47 is pulled 4upward g and actuates the lever 42 to push `tlieelutch element 43 up against and-'into engagement vwith the worm gear 156,'w'h'ereby the shaft-'32`is rconnected tothe sleeve- 13 y'to form a unit therewi'th. The upper end of 'theshaft V32is provided with 'a cross Ahead f61 which latter slides on two vertical rods '62 supported be- Y the splate 28 previously mentioned and a im p second lplate`63provided in the mast above the *late 28 Zand in spaced relation thereto. It will be noted'that while the rods 62 do not prevent the naast from moving axially, they `do prevent rotary l'motion 'relative tofthe shaft It will -fbe understood that when the mast i-s held against rotary motion and the sleeve i's revolved, the mast movesaxially due to the 'faction ofthe threads 13, but when the clutch is engzpigedV with the worm gear whereby "the shaft 32 andlthe sleeve 13 areunited, then 'revolving motion of the sleeve will cause the rna'stjto revolve dueto the factfthat the rods 62 are actuated by the cross head 61. The

fr'riast may vbe held against rotation or yinade ing grooves in the top and bottom' faces of thek plate. The flanges are arc-shaped and their arcs are drawn relative to the axis of the mast housing so that when the plate 68 is adjusted laterally, the trigger 66 lalways points toward the axis of the housing, and lies in a radial plane; Adjustment Yof the plate 68 may be effected by means of Iscrews 77 threaded into lugs 78 projecting from the face of thehousing and bearing on opposite sides of the plate, the screws being locked in osition by loclrnuts `7 9 bearing on the ugs. When the trigger 6G is in the horizontal position indicated in Vlid-, fure 3, its front edge engages with oneV of a plurality of vertical 'grooves 81 provided in the mast asfshown lp'aitioula''rly well in Figure 4 `and thereby flocks the 'mast against rotary movement.y The trigger maybeoperatedl by means 'of the ver-'tical `rod 82 engaging the free end 'of the trigger jas vshown at"831and connected `to an a :arm 84`of1the lever 49 so that when the latter y is fact-'ufat'e'd by :means of a rforward pull on the 'rod '52,the free'end ofthe trigger '66 is pulled `dox'vfnward, andy the 'front of the' triger disengages from the grooves `81 of the maf'st, `thereby allowing the Alatter 'to turn. lt lwill benoted that the lrod 82 is preferably made of v two sections 82 82? loosely jointed at 86. A spring 87 y resting in 'a cup l88 disposed on a lug 89 extending from the :guide kpiece position.

Adjustment of `the `met for .accurate yie# 'su-ltsmayfbe fsecured vin the folloiwing inanv arm extending from the mast If the fcut `actually made proves to be aftrue right angle, the adpistment Aof the mast relative to the `mast housing is correct; ibut. -if the angle slightly varies from 'a 190 angle, fproper f ad'-` ju-stment may :befobtained by shifting fthe plate 68 by means of the s'crews 77 `until proper results"areohtainetb4 It will'be underhas been obtained, no resetting will be necessary until thru shipping, moving, or conftinued use Vfora long period of time, warpging, etc., conditi-ons have '.changedfsofasto throw the guide 91 out of adjustment'frelativ'ey to themast.

It willl be noted vfrom the position yof -the jgrooves shown in fFifgure. 4, that they allow the mast to be held by `the -`trigger *66 linra number "of clearly defined positions, spaced 145,0'.apait., Ifgit is desired to temporarily flock the mast in any other position, theopera- 74 'tends to force the trigger :into active stood, kof course, that once the '-correctsetting tor may use for this purpose'the set screw 91 i 'threat-led into a bottom `cap' 92 o'f Ithe. masthousing as at 93 and entering an annular groove 94 in the shaft 32 to bear against the bottom of the groove and to thereby` hold the shaft against rotation. The set screw 91 is loperated by means of a long rod 96 and a hand wheel 97 disposed at the front end thereof at the front edge of the bench. It will be noted that a second set screw 97 is threaded into the cap and enters the groove 94. This set screw is not intended to contact with the bottom of the groove, but only hold the shaft against axial movement. v

yThe mast housing may be clamped upon the mastby operation of the handle 97 thru the horizontal rod 98, the vertical rod 99, and oppositely threaded screws 101 drawing confronting edges of the slotted housing together. This particular feature has been described in my co-pending application and does not form a part of the present invention.

The operation of my invention will be understood from the foregoing description. It will be noted that all adjusting is done by means of the single hand wheel 19. If it is desired .to raise or lower the mast, it is only necessary to turn this hand wheel which, thru the worm gear 16, revolves the sleeve 13 and causes the mast to move axially. thru the threaded end 14 of the sleeve engaging the nut 27. If it is desired to change the angularity of the mast, the rod 52 is pulled forward by means of the handle 57 and locked in its forward position by means of the latch 58. This causes the rod 47 to be pulled upward and the rods 82 to be pulled downward with the result that the clutch 33V ties the shaft 32 and the sleeve 13 into one unit while the trigger 66 is withdrawn from the slots 81 in the mast it was engaged with. If now the hand wheel 19 is turned, the mast will revolve and may now be turned to any of the other o positions indicated in Figure 4 when it will be held in position by the trigger 66 after the same has been released from the latch 58 or in any intermediate position Aby tightening of the set screw 91 thru the hand wheel 97.

Proper adjustment of the position of the trigger 66 so as to insure rectangular position of the mast arm relative to the guide board 91 in one of the positions using grooves 81 is secured by manipulation of the screws 77 in the manner previously described.

I claim:

1. A standard for a universal tool of the character described, comprising a mast housing, a sleeve revolvably suspended in said housing, means for revolving the sleeve; a mast threadedly supported on the sleeve; va shaft in said sleeve and connected beyond the end of the sleeve to the mast so as to lock f the mast against rotary motion and to cause the same to move endwise when the sleeve is rotated; and means shdable on the shaft for connecting the shaft to the sleeve', thereby housing causing thegrotationV offjthe mast.Y with thev sleeve., .Y 'c y c. 2. A standard forza universal tool of the character described, comprising a mast housf ing,- a sleeve rotatably suspended ini-'said housing; av mast threadedly supported on said sleeve; a rconcentric shaft inside of the sleeve, being connected with the mast beyond .the end of the sleeve` so as to lock themast against rotarylmotion and to cause the saine to move endwisewhen the sleeve is rotated; said sleeve being rotatable on said shaft, means for rotating said sleeve; means slidable on-the shaft for connecting said shaft to an end of thesleeve, thereby causing the rotartion of the mast with the sleeve; and means- ;'for sliding the said connecting means on the shaft into and out of engagement with the lend of the sleeve. c, f l

3. A.V standard for a d universal toolofthe character' described, comprising a mast housing, a sleeve revolvably v suspended in said g ,y a mast threadedly supported rela,- tive to said sleeve; a shaft extending thru the'sleeve; means for fixing they shaft relative to the mast for-common rotary motion;

Vmeans for revolving the sleeve for impartimg endwisemotion to the mast; and` means for connecting the shaft to the sleeve, whereby the endwise motion of the mast `is changed to revolving motion; the means for fixing the shaft relative to the mast comprislng.spacedfr plates within the mast,`-vertical elements connecting the same, and a cross head o'n the shaft interlocking with the vertical elements.

4. A standardV for a universal tool ofthe character described, comprising ,a mast housy second plate in the mast above the former lplate and spaced therefrom, uprightl mem@ ternal flange adapted to rest on the plate, a 'i ers supported between the plates, a shaft revolvable within the sleeve and a! cross head on the shaft interlocking with the upright members, the cross head and the'flange being formed so as to allow the cross head to be withdrawn through the'ilange.

'6. A standard -for a universal tool of the Y character described, comprising a mast housing, a sleeve revolvable therein, a mast threadedly supported on saidsleeve, a shaft inside the sleeve and connectedbeyond an end of the sleeve to the mast so as to prevent the rotary motion of the mast with the sleeve; a Worm drive for revolving the sleeve so as to cause endwijse movement of the mast theref on; and meanslslidable on the shaft for conf5 necting the shaft to' an end of the sleeve, theref by causingl the rotation of the shaft, the jmast, and the sleeve as a unit. 7 A standard fora universal tool of the character described, comprising a mast holising,rtW`o concentric shafts supported therein,

awvorm gear onthe outer shaft, a Worm for revolving the same, a clutch slidable on 'the inner shaft adapted for engagement with the 'outer shaft, a mast threaded on the: outer shaft, said inner shaft having axially slidable, but nonaotatable engagement with said mast, means for. normally locking the mast 'against revolving motion and means for 'engaging the clutch having means associated *n therewith for vsimultaneously releasing the `locking means. v v

8. LAV standard for a universal tool of the `character described, comprising a mast housing, tvvo concentric shafts revolvable therein;

*51 a mast threadedly sup-ported relative tothe outer concentric shaft; Vrr'neans ior imparting Y rotary motion tothe outer concentric shaft;` the inner shaft being connected beyond the end of the outer shaft Ato themastso as to "IO, preventtlherotaryjmotion of the mast vvith AtheV outer shaft, thereby causing `endvvisevmovementofthe mast When the outer shaft is rotated; and means slidable o'nthe inner shaft for connectingthe inner shaft to the outer 55,55 vshaft for transmitting rotary movement *from f the outer shaft to the mast.l 9. standard for ay universal tool of the 'character described, comprising aina'st housing, 'tvvoy Vconcentric shafts revolvable' therein,

7i/fo amast threadedly supported'rela'tive .to one ofthe shafts and fixed against rotarymotion vrelative to the other shaft, means for imparting rotary motion to the` former shaft and means for connecting the secondsliaft tothe `f first shaft for revolving the mast, the latter ineens comprising a clutch element, slidable on one of the shafts, a yoke `for shifting the same, a bell crank lever 'o'n the outside ofthe housing operating the yoke, Vaisee-ond bell crank lever abo-ve the first lever, a rod connecting one' arm` of one of the said y'levers with one arm of Athe other lever, a horiontal j rojd extendingvforyvardly vfrom the other arm of the =second lever so as to allowl theA yoke to '55 be operated by a forward pull ron the latter `rod, and Vmeans for lockingthe said rod `in aI forward `]oos itic'n'. e f In testimony Whereof'l my signatiire. CQ v LEWIE Ll fBELNAP.