US1244575A - Sawmill log-setting device. - Google Patents

Description

Patented Oct. 30, 1917.

4 SHEETS-SHEET I.

INVEJVTOR.

WITNESSES: W

w. H. APPLEMAN.

SAWMILLLOG SETTING DEVICE.

APPLICATION FILED APR. 30. I915.

Patented Oct. 30, 1917.

4 SHEETSSHEET 2.

' INVENTOR.

WITNESSES.-

W. H. APPLEMAN.

SAWMILL LOG SETTING DEVICE.

APPLICATION FILED APR. 30. I9l5.

Patented Oct. 30,1917.

4 SHEETS-SHEET 3.

uww

INVEZVTOR.

Xgyw

WITNESSIES.

w. H. APPLEMAN.

SAWMILL LOG SETTING DEVICE.

APPLICATION FILED APR. 30. 1915.

Patented Oct. 30, 1917.

WITNESSES: INVENTOR. 23 BWW 9 i i A TTORNEY.

un s'rA'rns SAWM I LL LOG-SETTING DEVICE.

Specification of Letters Patent.

Patented Oct. 30, 1917.

Application an April 30, 1915. Serial No. 25,077.

To all whom it may 001. 061%:

Be it known that I, WILLIAM H. APPLE- imzv, a citizen of the United States, and a resident of Clean, in the county of. Cattaraugus and State of New York, have in vented a new and useful Improvement in Sawmill Log-Setting Devices, of which the following is a specification.

My invention relates especially to accurate means for actuating and controlling the movement of what is termed the rocker shaft of such log. setting devices, in order to impart proper movement to that portion of the setting mechanism that engages more'directly with the setting shaft and head blocks. I p

The object of my invention is to provide a means for securing greater accuracy in moving the head block knees or standard toward the saw line, greateraccessibility to working parts and at the same time eliminate the impact and objectionable inertia found in other machines for a like purpose.

I attain these objects in the mechanism illustrated in the accompanying drawing in which I Figure l, is a right side elevation view of my device, assembled in connection with portions of a saw-mill carriage and illustrates its application to same. I

Fig. 2, is a rear end elevation of the ac tuating members shown in Fig. 1.

3, is aplan and also sectional view of a sliding guide block outlined in Fig. 1, and also required in Fig.2. I 1 v e 4-, is a left side elevation view of my device assembled in connection :with a sawmill carriage, and, outlines sufiicient members of the usual type of setting mechanism to make its general application fully understood. I I

Fig. 5, is a side elevation view of the graduating or setting lever shown in Figs. 1, 2 and 4t, the near branch of same being removed in order to present an internal view of same. I

Fig. 6, is a sectional view of the lower end of Fig. 5 taken radial of the curved portions of same,- at its pivotal support and inwhich the relative positions of the two branches of same are maintained.

Fig. 7 is a rear, end elevation of a slight modification of Figs. 1, 2 and 4;.

Fig.8, isa side elevation view of said modification. I 1

Fi 9, presents both a side elevation view and sectional elevation view of the link type members shown in Figs. 7 and 8 of said modification.

Fig. 10, is a side, and also endelevation view of a cross head used and outlined in Figs. 1, 2, i and 7. i

Fig. '11, is a longitudinal sectional view of the cylinder and valve chest of Figs. 1 and 4 of my dcvice,-and taken on a vertical plane slightly to the right of line of r/,u, indicatedin Fig. 14:.

Fig. 12, is a sectional plan view of the up per portions of the cylinder as it would appear, when sectioned horizontally on a line BB in Fig; 11.

Fig. 13, is aplan View of the bottom of the valve chest of Fig. 11 as it would appear if the top of said chest was turned from Fig. ltfis a'plan view of the top of the. cylinder of Fig. 11 as it would appear where it meets the aforesaid valve chest, and as suming that the top of said cylinder was turned toward you.

Like symbols indicate like or similar parts throughout all of the various figures. The functions of such members as are indicated by dotted lines is so clear as torender them easily understood by any one skilled in the art, or familiar with sawmill appliances.

A carriage frame 1 is provideclfor sup porting my device, as well as for illustrating its application to same, said carriage being mounted on a series of trucks 2, and being equipped with two or more head-blocks 3,,

each of which in turn is provided with a knee or standard 4, the lower surface of which is provided with a rack 5 which engages with a pinion (not shown) but located within the confines of block 3, on a setting shaft 7, said shaft being of such length as to form a connection between all of the blocks and standards employed. An engine having an extension bed or frame'is so mounted on carriage frame 1 as to form a substantial anchor between said carriage frame 1 and setting shaft 74 Saidengine comprises a cylinder 8, having an integral extension base which is so machined as to form a cylindrical guide 8*. Working in said cylinder isa piston 9, and rigidly at tached thereto is a piston rod 10 which passes through a stutfing box' 11, and rigidly engageswith a cross head 10 said cross-head being machined to a sliding fit'in guide 8, and having an opening 10", therein which carries a pivotal pin 10". On top of c vlinder 8 is a valve ciies 12 .litted with a valve 13 and having an outward extending stein ll, which has means of engagement with an operating lever 15.

On the right side of the engine bed is rigidly attached a skeleton frame piece 16, which at the top thereof supports a pair of circle pieces or quadrant 16% having notches covering its entire upper surface. Said fraine piece is rigidly secured to saic. engine bed by bolts 17 and also by bolt 18 which passes through an ear or lug 1 on said frame piece, and also through a corresponding lug on cylinder 8.

Frame piece 16 11Gb only provides a bean ing support for the operating valve mechaiiisins but is also provided with a pivotal opening 20. Secured to the left hand side of the engine bed and cylinder in like menier, is a second fraine piece 21,-the side view outlines of which can be distinctly traced in Fig. 1. Said franie piece, however, only extends upward a little above the lower edge of the large circular opening in frame piece 16 and at wiich point it carries and supports a joi nal bearing 22. lt is also provided with a pivotal opening 20 which is in direct alinenient with opening *0, in frame piece 16. Still further to the lef is a third fran e piece 23 which rests on carriage frame car ies bearing 2% which receives the setting shaft land also extends upwarc and supports abearing alinement w th bearing 22, of frame 21.

Inserted between frame pieces 16 and ai, is a swi-iging graduating setting lever said lever being forked its lower-end, each branch thereof being provided with stub shafts trunnioiis Q7 and 28 which within the pivotal openings 20 and it) in frames 16 and 21 respectively, said openings being located almost on a line with but slightly below the central lne of piston rod 10. The upper end of L providedavith a. latch which ad opted to engage at any desired poi t on qt 16, and the lower branches are caci provided with a circular guide b fac 30 whic axial alineinent.

Mounted in bearings 22am]. 7 t 21 and 23 respectively, a she it 31, usually referred to as the p shaft in sawniill settin devices. Said shaft is fitted with an arm having a crank pin 33 which lies approximately on a level with shaft 31, and also directlv at the radial center of guides 3030. Pivotally attached to cranlr 1 3?.-

is a depending link 34 having a .of l lr f frames" attached to by a pivotal pin 33. Connecting l i rod 37 however, are when all parts are in the position shown, the center of pin 38 stands directly on line with the ELXIS oi trunn oiis 27 and 28 of lever 26. Pin 38 in addition to passing hrough said connecting rod and link also extends beyond the outer forked end of rod 37 both sides thereof and enters into gui le chambers 30 their full depth, and each o said extens ons within said guides are pivotall nroded with a v'r i 1'1',: 1. 'i guide hiocir =39, w icn is machined to a slidlit in said guide 30. Therefore,

he observed that pin 38 brings the ,centeof guide block 39, the center of the oined ends of links 34 one rot- 37 and trnnnions 27 and 28, of the setting lever, all directly in line. Lyiig between frames 21 and 23 are tl e usual members of an ordinary set ting irechanisni comprising 'a pair of wheels L0 all ll which are rigidl attached to setting siaft 7. Pivotally attached to shaft 7 and 'icling id are swinging paw ipp 0 being nt ed with to engage with. said in hr swinging tl opp-cs1 is attached to rock on as to bring its -h said pawl carriers.

lile rocker arr upper aria lei and a link 46 connects the lowerai n of sa rocker with pawl carrir (Shafts 1 A -,l e and IS i to receding incchanisin not ,lrcd' in my application.)

1011 of my device srceedin All asimple.

1 termed a home posi 4 lever 15 toward c iud S or a wa head r0 to mow toanl inasiiiuch as the ting rod low .7 34s. and the two guide blocks 1 all pivctell v secured to each other b pin 88, they must naturally be guided btv and rod 10 with c ward the operate outer end of conn-c the course of said guide blocks and which travel outward and upward on the arc shaped guides 30 as the piston rod nioves outwdrd. and also return their former position when the piston is urned to its h ine position.

Now if the foregoing movements are effected with lever 96 n the borne position O Oi witi F 1g. 5) having its center directly in line with the center of crank pin Slihand therefore. no movement whatever is imparted to said crank, orthrough itto rocker links against lateral motion.

If, however, lever .26 berocked forward to the dotted position shown in Fig. 1, the upper end of guides 30 are also rocked forward, thereby carrying their radial center which with lever 26 is'imaginary only) irom the center of crank 33 to cross 6 of said diagram, F 1g. 5, and the outward movement of the piston will cause pin 38 to travel on a radial line which begins at cross at and terminates at cross 6, and during which crank-pin 33 will be carried from its home position, around to cross (Z, thereby imparting the maximum movement to said crank and rocker that is due for a single halt cycle of the piston. From the foregoing explanation, it is evidentthat if lever 26' be only slightly tilted forward from its home position, the radial center of guides 30 will only be correspondingly moved away from the center of crank 33 in the direction or cross 6, and therefore, but a correspond ing slight movement only, will be imparted to crank 33 and rocker shaft 31. It is therefore evident that, during the outward and return stroke of piston rod 10 the movement of crank and rocker shaft 31, may be varied from no movement to the maximum above described.

In the modification disclosed by igs. *7 and 8 the distinction is very slight and pri marily consists of employing a formerly imaginary radial center for a real supporting and guiding center, hence subscripts of the distinctionsdue to said modifications only, are included. -Lever 28 takes the place of former lever 26. It is not necessarily forked, and is pivotally' attached to frame 16 at pivotal point 20 by a large adjustment bolt 28 Guides 30 are omitted, but instead a projecting arm is added, contaioing an opening in which a pivotal bolt,

is rigidly secured. said bolt being so located as to correspond with the radial'center of guides 30 on lever 2-6. and also stand directly in line withcrank 33 whenlever 26 is the same homeposition as lever'26 in Fig. 1. Pivotally attached to bolttib is a link 3% substantially a duplicate of link except that it carries a male sleeve like extension, and link 3 has its lower pivotal opening slightly enlarged in order to receive said extension and thus preserve their pivotal ahnement. after which they are fur-- ther secured by a pivotal bolt 38- having a spacing nut 38 which fitsxslidingly against the inner side of frame 21.

The outer end of the forked connecting rod 87 is widened out slightly, and not only embraces the lower ends of both said links, but tills'thc remainderof the otherwise 'un occupied space between frames 16. and 21 thus completely guiding it as well as said Crank arm 32- is slightly modified, butby means of crank 33 attaches tn link 34; in so near the same manner as in Fig. 1 further comment.

By comparing Figsj? and 8 with Fig. 5, it will be seen that all similar or correspondas to require. no

ing members are in a like position. Also that in Fig. 8, link 34 is entirely concealed but substantially outlined by link 34*. Also that a forward movement of lever26 carries the pivotal center of bolt 33 over identically the same arcuate line as that described by the imaginary center of the radial guides shown on lever 26 in Figs. 1 and 5, and therefore, that the outer or coupled ends of links 34% and 3% as well as that of forked connecting rod 37 will, when in motion, describe identically the same arcuate lines as it directed by guides 30 of lever 26, instead of by pivotal pin 33 in Figs. 7 and 8, and therefore, will impart identically the same movement to crank 33 and rocker shaft 31. Inasmuch asI wish to place particular emphasis on my method of piston control, I

have deemed it best and proper to devote a section of the specification to it exclusively as disclosed in Figs. 11, 12, 13 and 14'.

In Fig. 11, the'valve 12 is provided with a central steam inlet and chamber 50, also an exhaust outlet 51 and exhaust ports 52 and 53, the latter terminating in exhaust chambers at each end of said chest. Leading from steam chamber 50 but lying slightly to one side of the chest and cylinder center, are duplicate steam ports 54 and 55 which lead to their respective ends of cylinder 8. And leading fromexhaust chambers 52 and 53 respectively are duplicate exhaust ports 56 and 57 which lead to their respective ends of cylinder 8. The upper ends ofsaid exhaust ports being bored through to the aforesaid exhaust chambers, and whereby their actual capacity is predetermined.

The lower ends of said exhaust ports comprise narrow slot-like openlngs into, and extending longitudinally from the ends of l the cylinder to points distant from the ends of said cylmder. Fig. 11 shows steam port 54: open, and piston 9 standing at the right -56 at a closely restricted maximum rate until piston 9 reaches the inner end of port 56, after which said exhaust out-flow will be gradually reduced until piston 9 comes to rest against the cylinder head, and where The greater part all port openings will be by the speed of said piston whicl'rhas already ,been restricted to not over 80 ft. per

' minute, is then. gradually reduced until it comes to rest againstthe cylinder head with I little ornot appreciable impact. As a further refinement and control of the exhaust,

tonmotor, hating the usual unrestricted inlet passages, and having exhaust passages constantly rest ictedfsufliciently to materi allyjreduce the piston; speed below that which the fluid pressure would otherwise impart to it, and which" are still, further gradually restricted by g the advance of the piston toward the end of the stroke, in, com

bination with means' tor transmitting the constant throw of tie plston to the intermittent grip device, which means is adjust- I able to predeterminedly vary the range of movement imparted thereby to said intermittent grip ClSYlCG.

2. 'A machine'element adjusting mechanism comprising an intermittent grip device hayingabaclr andvforth mot on, a fluid pressure, cylinder and piston motor, having the usualunrestricted inlet passages, and

havin exhaust oassa es constantl re- ,VO I c: i

stricted sufficientlyto materially reduce the;

piston speed, below teat which the fluid pressure would other-wise impart to it, and

which are still further gradually restricted by the advance of the piston toward the end of the stroke, in combination with means for transmitting motion from said piston to said intermittent grip device.

3. A machine element adjusting mecha nlsm comprising; an ntermittent grlp device having back and forth motion, a fluid pressure cylinder and piston motor, having,

inlet passages ample to admit andmaintain the, fulland unrestricted supply pressure upon the piston, and having narrow slot like exhaust passages extending longitudiieilrsvs nally inward from the endsoi said cylinder, and constantly restricted, sutfic ently to materiallyreducethepiston speed below that which thefluid pressure would other wise impart to it, v and which are further. gradually restricted by, the advance of the piston toward theend of the stroke, incom bination v,with means, for transmitting ,mo- '65 tion from said piston to said intermittent grip devic v I t. A. machineclement adjusting HlQCllflr ism comprising. an intermittent grip v-de vice having a backand forth motion, a

rocker shaft which. constitutes theimmedis. ate member for actuating said mechanism, a crank ha ing an arm secured to, said shaft for actuating it and said-mechanism, a con-,

stant throw, fluidqpressure, cylinder and piston motor, a piston rod extending out ward tronrthepistoniotsaid motor, an Idjustable setting levers having a pivotal sup- 3 port,- the axis of which, is substantially in frontof, and inilinewith said pistonrod,

a connecting rod -leading trom saidpiston rod andpresenting its outerbearing in line with the axis of said setting lever, a mom-u ber forming a direct connection between said crank and-the outer end of said con w secured directly to said setting leveigwhich causes the outer bearing or said connecting rod to describe an ,arcoii a circle whicln, while 1 of fixed andnect-ing ro and means constant dimensions isa subject---to such changes in its position as to vary; and pre-, determinedhe movement of said setting mechanism, irrespective, Qf the; constant throw or" the piston oi'saidmotonw 5.,A machineelement adjust ng, inecha-.-

nisnr comprising, an intermittent grip, de-a vice having a, back and forth motion, afiuid pressure, cylinder 'and piston motor, having; inlet passages and in addition thereto, having I narrow slot like exhaust passages extending longitudinally inward fromt-he ends :of the V cylinder and which ale constantly restricted suffici'ently toirechice the piston speed below. that; which the fluid pressure would otherwise impart to it, and which are stilli'urtent grip device; a 1

7 WILLIAM HiAPPLEMAN. l Vitnesses: i 1 1 M; S; Aimnswon'rn, J. P. AYLESWORTH.

Gopies of this patent may he obtained for five eeutsireache addressing the (50inmission er of latents, Washington, 3. C.

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