US1590988A - Combined setwork and recede for sawmill carriages - Google Patents

Description

June 29, 1926. 1,590,988 I} s. E. CAMPBELL I COMBINED SETWORK AND RECEDE FOR SAWMILL CARRIAGBS m Sept. 24, 1924 Sheets-Sheet 1 June 29 ,1926.

VG.E.CAMPBELL COMBINED SETWORK AND RECEDE FOR SAWMILL CARRIAGES Filed Sept. 24, 192

4 Sheets-Sheet 2 G. E. CAMPBELL COMBINED SETWORK AND REEDE FOR SAWMILL CARRIAGES June 29,1926. 1,590,988

Filed Sept. 2.4, 1:524 Sheets-Sheet 4 40 knees 5,

the knees to advance or recede' upon the 45 mechanism Patented J une 29, .1926.

fGEonGn CAMPBEL or cnn'rr COMPANY, orcrm'r'r 'nooGA, ennessean cpnrommion' orj rnnunssnnf ANDOGA, "rnnnnss'nn. lis'sie'non To run wHELAnD COMBINED sn'rwonx AND nncnnn roe SAWMiLL cARR IAens;

Application filed. September 2411 24. Serial'I i'o. 739,636.

This inventionjrelates. to combined setworks and recedelforsaw milllcarriages; the object being ,to comhine into I one nnit the hand-operated set-works, spring-rec'ede and 5 brake, and to operate all of these functions with one lever suitable for use .on asaw- I mill'carriage.

; Another object of nay inventionisthe ar- I i the sawmill setworksmou'nted on the carriagey -Fig. Qis-anendvieWofthe same; p I

Figs 3 is an enlarged side elevation, partly in section, of the pawland ratchet mechanism; '1 H 1 Fig. :4'is an end view of the mechanism 2 shown inFig. 3;- J

i Fig. 5.is aplanview and q s v Fig. 6"is a detail plan View of the pawls. The numerals -1'1 indicate the rails; 2,

of the quadrant cap;

' the carriage mounted uponjsuitable wheels 3- 3 adapted to traveluponthe rails 1-1 1.

Arranged transversely of the carriage at.

eitherv end thereofaare 'guideways 4: upon which are slidably mountedtheheadblock knees 5. Journaled in theguideways 4:;is a drive-shaft 6 extending longitudinally of the carriage, and keyed thereto at each end is .a gearwheelj'f adapted to mesh with the cogs 8 on the under side of the headblock the rotation of the shaft 6 causing carriage. v V

As a means for operating the knees" as described, I preferably provide the following Keyed to the shaft d is -"a ratchet-wheel 9,

the periphery of whichiis provided centrally thereofrwith ratchet teeth 10, edges -11--11 servingas braking surfaces. Y

5 i I. The shaft 6'is supported on oppositesides of the" 'ratchet-Wh'eel 9 by suitable bearings 1.Z'12 integral: with a-base 13:1I1011I1t8d. up-

"on the carriage 2., 'Extendingrearwardly from thebase 13 are brackets j 147-14 upon which areqpiyotallyx a ta; the, hclipawls 15%:15, there being two abreast,-;-an d one a trifie shorter than theother whereby a erdjus ment ay e ha I is-Qe vious that onewould suffice. brake shoe 16 hearing normally; against the braking drums 11 adj acent" the I ratchet-wheel 9. {is

pivotally' v mounted upon one end. of. a bell:

crank lever; 17 upona pin 17 journaledxin suitable bearings 18 1 adj ustably mounted 1 in slots 19 in the brackets 14%14; The lower end of the bell-cranklever 17 ,i's provided. a

with? a weight' 20 iwhichacts normally Lto hold the brake W The numeral 21 indicates a pawl set lever,

-forke'd "at; its lower end l straddle the shoe-16 against' 'th ratchet? J ratchet-wheel 9,.theilowerends oftheforkedli member being pivoted to the shaft A. pa r 53 of advance ratchet-pawls22 ar'wpivot'edito I wheel.9, th'e pawlsbeing of different lengths whereby a finer. adjustment rna'y be 'niadei I .The nume ral; 23. indicatesga pawl: lifter pivoted upon the-pin 17 zand extendingbeneath alla'terally projecting Ilug15 of the check-'piawls 15,2a1'1dbeneath a -laterally ex-K tending 111g 22', of one of the 'advanc'e' pawls 22 ,ZEXtending forwardly from theE-pawl lever 21 ,is 'a: PulLrod: 24eyprovided with .a handley25' serving in' on'e instancegas-a means rod 24 is rotatably journaledfin-a'bracketZ26 for actuating the pawlelever.v 21.- 1". This fpullsecured to: the upper-gendof the pawlrlever 21. Theouter end of theupull rodiStvlrned down to'form an at-m2? which isiconnected ,by' a chain 28to the outer endof zthe'ipawl i I lifter 23. .An arm 29kextendingdownward- Y lyfrom the pawl-'lifter'23 is valignedwithpa lug 3'0'formed on th'e'belhcrankbrake leverp After the pawl-lifter has raised thegpawls" from the ratchet-wheel 9, bythezr'otation of .thepul1-irod'24,-the arm 29 serves to; release the brake-shoes 16, releasingrthei,ratchetwheel 9. It will be observed that the down :ward movement. of the pawl-lifter 23. again applies the brake before "thezpawls' areilet downinto engagement Twith the: ratchetwheel,"thereby'preventingtheipossibility-of destroying the teeth 4 of the .ratchetrwheel. i JAsf-a means for'regulating the movement of the pawl lever 21,1 1 preferably provide afquadrant cap 31, the base of which iforms secured at its outer end to the shaft 6 by means of a collar 38, and at its inner end to the base 13, is wound up, keeping the ratchetwheels under tension, the latter when released by the brake 16 serving to recede the knees back from the saw.

As noticed in Fig; 3, the recede spring 37 imparts a backward motion to the brake'll as indicated by the dotted arrow A, the action being such that the minute the recede spring applies power in this direction the brake 'shoe l6graspstightly with a wedging effect; due to the toggle action of the link 17 and weight 20, this toggle action is always positive and automatically opposed to the spring action. On the other'hand when the operator desires to advance the kn'ees bypulling forward the lever 21in the direction of the arrow B, the brake due to thetoggle action,ofiers' very little resistance.

, 1 In operation, the kneeso are'receded',"and

' are sawed.

'a log placed in position whereupon the pawllever '21 is actuated by the pull-rod 2a, to advance the log step by step as 'the'boar'ds As theratchet-wheel 9 is rotatedto 'causethis advance, the spiral spring ."37is wound up, the pawls 15 and the brake 16 preventing "the rotation of thera'tchetwheel 9 in the opposite direction. Whenit is desired to Irecedethe' knees, the operator rotates the -pullrod 24c whereupon the pawl lifter is raised disengaging both sets of pawls 15 and 22 from the i'atchet wheel 9. The brake 16, however, still engages the ratchet-wheel 9 preventing its rotation in the backward dire'ction. A further upward movement of "the pawl-lifter 23 causes the arm 29 to engage the lug 30 of the brake bell crank lever, releasing the ra=tchet-wheelJ9.

Permitt-ingthe knees'5' to i-recede from the "saw. The pawl litter is then lowered, first disengaging the brake-shoe 1:6, setting the b'rake,tafter which a further downward movement-permits the pawls again to engage thei-ratchet-wheel 9.

' "I claim 2 1, In a sawmill s-etworks, the combination with 'headbl'ockknees, .ashaft carrying a pinion engaging therewith, a; ratchet-wheel and brakeedrum keyed to-said shaft, a checkpawl engaging said-ratchet-wheel, a gpivoted :pawl leveiyza"pawl-engaging said ratchet- :wheelv to impart ;move'ment thereto in one direction, a brakeshoe ien-gagingsaid brakeadapted normally ,itQ prevent'the getaoperating said brake-shoe.

2. In a sawmill setworks, the combination with headblock knees, a shaft carrying-a pinion engaging therewith, a ratchetawh'ee'l andbrake drum keyed to said shaft, a checkpawl engaging said ratchet-wheel, a pivoted pawl lever, a pawl engaging said ratchetwheel to impart movement thereto in one direction, a brake-shoe engaging said brake drum adapted normally to prevent the rotation of said drum in the opposite direction, apull-rod pivoted for rotary movei'nent' upon the outer end of said pawl lever, and means connected to said rotary pull rod for raising saidpawls and operating said brake.

3. In a sawmill setworks, the combination with headblock knees, a shaftcarrying a pinion engaging therewith, a ratchet-wheel and brake-drum keyed to-said shaft, a spring 1 fixed atone end and secured to said shaft at its, opposite end, a plvoted check-pawl engaging said rat'chet-wheel, a pivoted pawl,

lever carrying a pawl 'engaging and adapted to rotate said ratchet-wheel against the tension. of said spring, a brake shoe normally held against said brake drum to prevent its rotation in one direction, a pull-rod rotatably mounted at theouter end of said pawl lever, a pawl-lifter actuated by said rotary pull-rod for progressively lifting saidpawls and operating said brake.

4. In a sawmill setworks, the combination with headblock knees, a shaft carrying a pinion engaging therewith, a ratchet-wheel and brake drum keyed to said shaft, a spring fixed at one end and secured to said shaft at its opposite end, a pivoted check pawl engaging said ratchet-wheel, a pivoted "pawl lever carrying a pawl engaging said ratchet wheel adapted to 'rotate said ratchetrwhee'l against thetension of said spring, a pivoted bell-crank, a brake-shoe pivoted thereto adapted normally to rest against said brakedrum to prevent its rotation against the ten sion of said spring, a pull-rod rotatably mounted at the outer; end of said pawl-lever, a pivoted pawlelifter arranged beneath said pawls, said pawl-lifter having. a lug adapted to engage said bell-crank whereby the pawls are raised and the brake disengaged from said brake-drum.

5. Ina sawmill setworks, the combination of a set shaft, a ratchet wheel, and brakedrum keyed to said shaft, pawls,-engagin-g said ratchet-wh-eel, a brakeashoe engaging the bralrerdrum adapted automatically to prevent the backward rotation of the-drum, and combined means for progressivelydisa engaging the parade and operating the brake.

:6. In a sawgmill setworks, the combination of a set shaft, means for-selectively moving said set shaft forward, a brake dram for said sharaa brake 5120.8 for engaging the lorake drum to automatically apply a loraking power to said set shaft, and combined means for progressivelydisengaging the forward moving means and for operating the brake.

7 In a saw-mill setworks, the combination of a set shaft, means for moving said set shaft forward, a brake drum for said set vshaft, a brake shoe in position to engage the brake drum to antomatioally'prevent back motion of the set shaft, and'means for pro-,

gressively disengaging the forward operating means and for operating the brake shoe" and disengaging. said forward operating means and for applying the brake, said means applying said brake prior to the engagement of said forward operating means.

' 9. In a sawmill setworks, the combination of a set shaft, means for moving vsaid set shaft forward, a brake drum for said set: shaft, abrake shoe in position to engage said drum to automatically prevent backmotion" of the set shaft, means for engaging said forward operating means and for. applying'the brake,'and means for causing-the brake to engage the'drum prior to the engagement of the forward operating means.

10. In a's'aw-mill setworks, the combina tionfofa setshaftfa ratchetwheel fixed thereon, an operating pawl for said ratchet wheel, abrake drum for said"set1sl'1aft, a

brake shoe in position to "engage, said brake drum to automatically, prevent back motion of-theset shaft, and means for moving-the pay'vl and brake-shoe into and out of engagement with tlievratchet wheel and thebrake drum, said means caus ng the brake shoe to the pawl with the ratchet wheel.

en age the drum Jrior' to the en a ementofj D x. b

ture.

In testimony whereof IafiiX my signa- H v GEORGE EQCAMPBELL;

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