US2605794A - Hydraulic log barker with traveling jet and automatic and manual controls - Google Patents

Description

GUETTLER HYDRAULIC LOG BARKER WITH TRAVELING JET AND AUTOMATIC AND MANUAL CONTROLS Filed March 26, 1949 Aug. 5, 1952 4 Sheets-Sheet 1 INVENTOR jg Herbert W 1311211112!- A-r'mnum Aug. 5, 1952 H. w. GUETTLER 2,605,794

HYDRAULIC LOG BARKER WITH TRAVELING JET AND AUTOMATIC AND MANUAL CONTROLS Filed March 26, 1949 4 Sheets-Sheet 2 INVENTOR all ,mym,

ATTORNEYS Aug. 5, 1952 H. w. GUETTLER 2,605,794

HYDRAULIC LOG BARKER WITH TRAVELING JET AND AUTOMATIC AND MANUAL CONTROLS Filed March 26, 1949 4 Sheets-Sheet 3 JE- I:

INVENTOR ww wrw,

ATTORNEYS Aug. 5, 1952 H. w. GU ETTLER 2,605,794

- HYDRAULIC LOG BARKER WITH TRAVELING JET AND AUTOMATIC AND MANUAL CONTROLS Filed March 26, 1949 4 Sheets-Sheet 4 I IOO I r u I 4 rr r 1 I I F a fig-E E 'BO In: 1 I: I 43 Lil i 1 3;:

E- 7 Herbal-L W. BUE LUEF ATTORNEYS riage and associated features. paratus for b'arking logs by projecting against fiatentecl Aug. 5, 1952 ING JET AND AUTOMATIC (JGNTROLS AND MANUAL Herbert W. Guettler, San Francisco, Calif. AppiicationMarch 26, 1949, Serial No. 83,590

This invention relates to apparatus for removing the bark from logs, and has to do with apparatus in which the removal of the bark is accomplished by a high pressure water jet projected-against the log.

It is known to remove the bark from logs by means of a nozzle which projects a high pressure jet of water against the log, this nozzle being moved lengthwise of the log during rotation thereof. It is also known to bark short logs by means of a high pressure water jet projected'against the log and extending the full length thereof, during rotation of the log. In another form of hydraulic barking apparatus, high pressure water jets are projected against the log. generally lengthwise thereof, from a nozzle structure surrounding the log and through which the log is moved lengthwise during the barking" operation. In hydraulic barkers employing a nozzle travelling lengthwise of the log, itis necessary to provide flexible connections of Claims; (Cl. 1442 08) considerable length for supplying thewater under pressure to the nozzle, which incurs difiiculties and expense in respect to leakage and'necessary repairsya'side' from the expensejof the travelling nozzle carriage, the; means for driving the carthe log a high pressure water jet extending the full length of the log during rotation thereof is suitable for barking short logs only since a nozzle structure of considerable length, such as would be required forlong logs, incurs difficulty The known ap-- in respect to maintaining the required high pres- I sure throughout the full length of the nozzle structure. In the'known apparatus in which the log is moved lengthwise through 'an annular nozzle structure, the width of the apparatus must be at-least twice the length of the logs handled. That is objectionable, particularly where logs of considerable length are to be barked, in that theapparatus ofnecessity occupies an objectionable amount of space.

My invention is directed to a log barker which avoids thereferred to objections to the above mentioned known hydraulic barkers. end, 'I provide a barker theoverall width of which need be but slightly-greater than the'maxim'um length of logs-intendedto be handled by such b'arker', and in "whiclfthe barking operation is effected by a. nozzle "head which is stationary lengthwise of the log; In conjunction with the To that nozzle head 'I provide means" whereby a high pressure 'water jet is projected against the log while the latter is rotated, this jet being of slight extent length-wise of the log and traveling thereshowing its relation to the log, which is I 2 along from one end to the other, effective for. removing the bark throughout the whole. length of the log. The nozzle head comprises a plurality of nozzles each having a jet opening for projecting a high pressure water jet against the log, these nozzles having associated therewith means whereby water under appropriate pres-. sure may be admitted to. the nozzles selectively, successively in desired order, orsimultaneously, as desired. Accordingly, the barkencf my.in vention is well suited for removing.,-bark from the log throughout the whole length thereof, by means of a traveling jet, as above mentioned, or may be used for removing from a log adhering patches of bark not previously removed in the barking operation performed insome other apparatus, such as a barking drun1 ,jor it may be used for subjecting the log to a continuous high pressure water jet extendingthe full-length of the log, when desirable. As will be und er ;v stood from what has been said, the barkerof my invention provides a novel and highlyef ficient method of 'barking logs, to which method 1 my invention is also directed. Further'objects". and advantages of my invention will appear frorn l the detail description. l

'In the drawings: I e I Figure 1 is a plan view of a hydraulic lo'g 'f barker embodying my invention, the 'log' decks. being partly broken away and certain of the logs on the transfer deck being partly broken away; i Figure 2 is a side view of'the apparatusfof Figure 1, with certain parts brokenawa'y;

Figure 3 .is a sectional view, takensubstan-p tially on line 3+3 of Figure 2, certain parts being shown in elevation; Figure 4 is a vertical sectional view, on'fan I enlarged scale, of one of the nozzles andits as' sociated valve, taken from front to'back of the. nozzle, this view also showing in 'elevationthe I valve operating means; I Figure 5 is a fragmentary lengthwise sectional v view, on an enlarged scale, of the. nozzle head.

shown fragmentarily in elevation; I V Figure 6 is a diagram of the solenoid valves for controlling the nozzles. and of the rotary: switch and the'manually operated switches for operating the solenoid valves, this'view showing the electrical circuits. for the motor drivingthef' rotary switch and for the solenoid valvesf and' Figure 7 is a diagram illustrative of-the order in which the solenoid valves are operated by the'-=- rotaryswitch.

The log barker of myinven tion comprises a 9 transfer deck l5 and a receiving deck is supported by a suitable framework on a base or foundation H. The deck I5 is of known construction and comprises channel members 18 receiving chains H by means of which logs l' to be barked are moved inward over the deck I5. The chains [9 pass about sprockets 20 on a cross shaft 21 'rotatably mounted in bearing blocks 22 secured to a cross channel 23 at the inner end of deck l5. The chains is are driven in any suitable known manner, which need not be described in detail here.

'speed, within limits, for driving the shaft 50 in desired direction and at desired speed. Assuming A cross rod 24 is mounted in brackets; 25

mounted on the supporting framework of the deck structure. The cross rod 24 receives several log loaders and stoppers 21 rockably mounted thereon at about their mid-length and curved or arched downwardly, as shown more clearly in Figure 2. stoppers 21 are connected together by a rod 28 securedltherethrough. This rod 28' is attached, at..its.mid-.1ength, to theupper end ofa piston rod 2.9 by. means permitting relative. turning between therods: 28 and 29, conveniently by. a col Ian-at theuppert end of rod 29 through which the rod 28 passes. through a stufiing box 36 at one end of a cylinder--3l pivoted at its: other end, at 32, to a bracket 33 anchored to base H. The rod 29- is.v attached at-its lowerend toa piston (not shown) operating in the cylinder 3 as will be understood.

The cylinder 3| is provided with upper and lower ports connected by. flexible high pressure conduits or hose sections 34 and 35 to two ports of a; solenoid valve 36 of known type mounted on an upright 31-oftheframe structure. The solenoid valve 3B1 is'also provided-with an inlet port com' ected-by a conduit 38 to a suitable source of supply of operating fluid under pressure, and is; further provided with an exhaust port (not The outer ends of the log loaders and The piston rod 29- passes shown). Preferably, I employ; steam under appropriatepressure foroperating the piston in cylinder 3 I Normally, thesolenoid valveBt-is deenergized-with the inlet port thereof open and the outlet or-exhaust port in communication-with the flexible tube or conduit 35' leading from the lower end of cylinder 3|. A piston in cylinder 3iisthen held under pressure at the lower end off this cylinder, effective for holding; thelog lodders and stoppers in their stop position shown.

A suitable number of log skids 40, slotted from their inner ends, are mounted on the cross rod 24' and are inclineddownwardand inward therefrom, these skids 40.; being restrained. against downward movement by angle stops 4| secured on uprights of the frame structure. These skids lfl straddle corrugated rollsor disks .42'secured on a. s haft 43jrotatably mounted in bearing blocks fllsecuredto channelmembers connecting uprights 3],"adjacent thevinner end of the deck l5to uprights 41 adjacent the inner, end of deck 116. The disks .or drums42 are alignedwith similar disks, or drums. 48,. fixed on a shaft 50.

disposed in parallel spaced, relationfto,v shaft 43 and rotatably mounted; in, bearing blocks, 5 1, se-

curedto the. channel members A5. Thedi ksjor dIiumSLAZandAB thus arelarran ed in p'airsand definelbetween them, in effect, adownwardly d1- ing. trough-like recessor depression for; re-

.VEI

,t oni'of a-log to ,beba-rked, as will appear more cep V clearly-from l igu -e Q,v I

Aisprocket-wheel- 53.is fixed upon one end of shaft 13, in alignment with a similar/sprocket wheel 54 fixed on the corresponding end; ofshaft Asnrqske s amiipasses about the spr k that the pulley 56 is driven in clockwise direction, as viewed in Figure 2, the sprocket wheels 53 and 54 will also be driven in clockwise direction and a log I resting upon the disks 42 and 48 will be rotated about its axis in counterclockwise direction.

A suitable numberthree are shown-of unloader sectors 62 are rockably mounted on the shaft 58. These sectors 62 are connected-together by a rod 63, adjacent theirlo'werends: This rod 63 is suitably connected, at its midlength, to the upper end of a'piston rod G ipe-ssing through a stuifing box 55- at the upper end of a cylinder fifipivoted at its-lower end; at 67, to'a bracket Eli-anchored to the base Hr As--will--beunderstood, the piston rod- 64 is attached to a piston operat-ing in the cylinder fififor imparting: movement to theunloader sectorsfizin desired directions. The cylinder 68' is'provided with ports adjacent its ends connected by flexible conduits or hose lengths in and H to ports of a solenoid' valve; 72' having an inlet: port connected by a. conduit 13 to a. source of supply of pressure fluid, conveniently a liquid such as water. The valve l2iis also. provided. with an outlet or exhaust port. When the valve 12 is. energized, it is effective for admitting water under high pres-.

sure to the cylinder 66 through conduit 1|,while1. permitting. escape of: water from cylinder 66 through the conduit 10; Accordingly, whenrthe solenoid valve 12 is energized the, pistonrodf 6A.

is projected and swings the unloader sectors ,62. in. clockwise direction about shaft 50., Thismove ment of thesectors 62. displaces the l'og I} from the' dis ks 421 and 48' and deliversitto skids 15, f suitably secured to the, framework of. deck, l'fi'... these skids. being. slotted. at their inner, portions and straddling the disks, 4.8., Inthat manner,

the, barked logsaredelivered to the deck I5 and. are conveyedby the chains 'lfi thereof to a-suitable point of discharge, asis known. When. the,

solenoid valve Ellis. de-energized, water under. appropriate pressure is admitted to the cylinder. '6E..through the conduit 10,- and water is.,dis

charged fromthe cylinder fidthrough conduit 1 In that manner, the unloader sectors. 62}: are. returned to theirqnormal inoperative position shown. injigure 2 and-araheld in that position during-the removal of the-bark from the log under treatment. It will be understood; that the sole,- noid valve 12 is controlled. byav suitably-located switch, in the same manner as thevalve: 35., aswill be explained more fully later.

A suitably constructed frame :89, otrectangulars shape inplan, is anchored to:the deck. framework: and extends; upward; an appropriate. distance.

thereabove, the top structure pf v this frame: overlying the log receiving space: or trough between the disks 42 and 48. Two vertical columns 8!.- are securedinfrarrietl}, oneadjacent each end thereof. nozzle head frame. 82 -cornprising upper and lower;

channel members 83:,and: 84: connected together- These columns,- 81 slidablyreceive a awar /i by end bars 85 and provided with guide sleeves slidable on the columns BI. A reversible low speed electric motor 86 of suitable known type is mounted on the topof frame 89 at the midlength thereof. A double grooved pulley 81 is secured on shaft 86a of motor 85. Two belts 88 one of; which is crossed, are passed about pulley 81, respectivelyseating in the grooves thereof. Each of the belts 88 passes about a pulley 89 secured one. cross shaft 93 carried by brackets SI secured to the top of frame 85 adjacent each end thereof. over sheaves 95 also secured on the shafts 90. One run' of each cable 88* passes downward about a sheave 92 rotatably mounted on across, shaft 93 mounted in brackets, one of which isshown at 94, secured to the bottom of frame 89 at the end thereof. From the sheave 92 the cableBIl passes upward and is anchored to channel member 84. The. other run of .cable 88 passes from sheave 96 downward to channel member 83, to which it is anchored. As willbe understood, the two cables Bil are connected to the nozzle head frame in the same manner. It will be apparent that by driving the motor 86 in appropriate direction, the nozzle head frame 82 may be adjusted vertically in either direction and todesired extent. The motor 8'5 is controlled by a rheostat and a reversing switch suitably located for ready access in the operation of the apparatus. Within the broader aspects of my invention, vertical adjustment of the nozzle head frame 82may beeffected in any suitable manner.

'The lower channel member 84 of the nozzle head frame 82 has mounted thereon a plurality of nozzles 95, the assembly constitutinga nozzle head. Each of the nozzles 95 comprises a body 91 of rectangular shape in front or back elevatlon, with the front and'backwalls thereof converging downward and defining between them, at their lower edges, a restricted jet opening 98 (Figure 4) extending the length of body B1, between the end walls 99 thereof. The nozzles 96 are disposed in juxtaposed relation, preferably with their end walls "in contact, and the inner face of each end wall 99 of the respective nozzles 96 is inclined do'wnward'and outward; This in-' clination of the inner surface of end wall '99 is such -'th'a-t thereis an appreciable overlap between-the'jet areas ofadjacent nozzles 95, as

willb'eexplainedmore fully'later. Each of the nozzles '96 is provided, at the top thereof, with a central neck I08 provided at its upper end with a circumferential flange IQI. This flange IBI receives 'a similar flange" I62 seating thereon, at

thelower end of a neck II3 of a valve IM. The

flanges'IEII and I82 provide meansfor securing the nozzles96 in assembled relation on the channelmember 84 of frame 82, while also securing the valves- IIMtothe nozzles 98.

The valve I94 is'of known type Two cables 88 respectively pass.

and comprises a cylindrical valve-member H15 extending into:-

the body oi -valve Hid'and' slidable through a stuffingbox I08 at'the upperend of "valve'IM. Thisvalve *member IE5 is provided with ports I0! adjacent Iits loweror inner. end, and controls communication betweenneck lii3iand. a

neckIIl9 extending fromthebody of valve I84 perpendicular to neck I33. The-neck Hi9 is pro-.

vided at its outer end with acircumferential flange III). for bolting to a flanged fitting III to which is appropriately secured ,one end of a flexible high .pressureconduit or'hose length II2 connected to atsuitable source ofwater undera pressure of appropriate value. The pressure used may vary considerably, dependirigppon the kind and condition of the logs being barked. In general, the pressure may be from 500' to 3000 pounds per square inch,though the limits stated may be'exceeded in either direction as conditions may require. I Y

Referring further to Figure 4, the valve member IE5 is secured to the lower end of a piston rod II4 passing through the lower head of a,

and lower ports connected by short tubes I I6 and I I1, respectively, to two ports of a solenoid valve I I3 suitably mounted on channel member 83. The

valve 8 is further provided with an inlet port' connected by a high pressure conduit I28, which may include a length of flexible high pressure hose (not shown), 'to a suitable source of water under appropriate pressure. The solenoid valve I I8 is also provided with an outlet port connected by'a conduit I2I to a suitable point of discharge. The solenoid valve is of known type and, when energized, is effective for admitting water or other operating-fluid under pressure to the cylinder I I5 through the tube I I1, while permitting escape of fluid from the cylinder II5 through the tube IIJ. Energizing of the solenoid valve H8 thus effects movement of the valve member I35 into its upper open position shown in Figure 4, for v admitting water under pressure tothe nozzle 85.

When the solenoid valve H8 is Clo-energized,

pressure fluid is admitted to the cylinder I I5 through tube I It and pressure fluid escapes from the-cylinder I I5 through the tube I Il The valve member IE5 is then moved downward into closed position, effective for cutting off the supply of water to the nozzle 96.

It will be understood, from what has been said, that each of the cylinders H5 is provided with a solenoid-valve I I 8. In Figure 3 I have shown twelve nozzlesst mounted on the lower channel member 34 or frame 82 and together constituting the nozzle head. Referring to Figure 6, the solenoid valves IIB' may be energized v being indicated by the reference number I28. The motor of the unit I 29 is controlled by a reversing switch I3iiand a rheostat I3I, whereby the direction of drive and the speed of rotation ofshaft I25 may be adjusted as required. A conductor I33, connected to-one side of a suit able source of electrical energy, is electrically connected to the shaft I25 in a suitable known manner, as by means of a brush contacting the shaft. The contact members I28 are respectively connected by leads I 34 to one side of the respective solenoid valves H8. Each of. the leads I34 has interposedtherein a switch I35 which 5 may be operated in any suitable manner, the switch shown being indicated as a hand operated switch. The other side of the coil of the respective solenoid valves H8 is connected by a lead I33 to a second conductor I31 connecte'dto the. other side of the source of electrical energy It will be seen thatwhen the switch I25 is in opera;

tion, the cams or contact members. I21 thereof will cooperate with the centact members; I 23 for The switch I25 comprises a suitably inassays-4 energizing the operating :coils of the--solenoidsponding tothe time required for turning the i log being barked through one complete rotation, as will be explained morefully presently. Du-r ing one complete rotation of shaft I-2B,the' sole' noid'valves' H8- are successively energized, it being assumed, for purposes of description, that the valves H8 are energized in the order in which they are-numbered, that is, from right to left in Figure 6. After the last or twelfth valve 1 l8 has been energized, there is a predetermined lapse of time, preferably corresponding 'to' the time for which each of the solenoid valves is energized, during which none 'of'the valves is energized; this inactive period being indicated by the sector 8 on the diagram of Figure 7. In this Figure '7 diagram, the numbered sectors indicate the contact members or cams I21 of the switch [25 and the time periods during which the cams close the energizing circuits of the respective solenoid valves 1 [8. As indicated on the diagram, as one cam I21 of switch I25 passes out of contact with the corresponding contact member 128, the nXl) cam I21 enters into contact with the corresponding stationary contact I 28.

It may be assumed,.for purposes of description,

that the log being barked is turned through one 1 complete rotation in two seconds. Under the conditions stated, the cam switch l=25should be driven at such speed that each of the cams I21 thereof maintains contact with the corresponding stationary contact member I28 for a period of two seconds. Assuming that the log to be barked is properly positioned upon the discs: or-rollers 4 2 and 48 and is being rotated at the speed stated, the switch I25 closes the circuits of the solenoid valves I H3 in the order in whichsuch valves are numberedinFigure 6, and maintains the circuit of each valve closed for a period of two-seconds.- When the circuit of the firstsolenoid valve is closed,-a highpressure waterjet is projected fromthe correspondingend-nozzle 95 of the nozzle log and "for a-distance lengthwise thereof-corresponding to the length of the jet. 'As' th flog completes onerotation, the supply-of water'to the first nozzle-is cut off and water'is'admitted under high .p'ressure'to the secondno'zzl'e and so oh.

I thus provide means whereby a high pressure one end of the log to the-other end thereof while the logis continuously rotated, whereby the log is barked throughout its full-length. Under-the conditions assumed, the log would b'ecompletely barked in approximately twenty four seconds. By employing a traveling jet in the manner stated, the nozzle head may remain stationary,

horizontally or lengthwise of the log under treatstruction and operation'as well as "to high efliciency. As previously noted, the jets from adj a centfnozzl'es overlap, as shown in Figure 5, in which it isassumed, for purposes 1 of illustration,

water jet of slight length relative to the total length-of the nozzle head is caused'to travel from that four adjacent nozzles are in operation-simultaneously, which ordinarily is not the case.

The effective lengthof the nozzle head is some what greater than the maximum length of logs which it "is 'contemp'lated will be barked in the apparatus; That assures barking of the log for the full length thereof. By means of the apparatus so 'far described, logs orconsiderable length, such as twenty feet or over in length, may be barked thoroughlyjand cleanly within 'a'com-' paratively short time. After the last nozzle of the nozzle head assembly has been put into operation, completing the barking of the log, allot the nozzles remain closed for a period of time represented by the sector s on the diagram of Figure 7, as above'explained. During that time, the unloader sectors 62 are operated for transferring the barked 'logto the deck 16 in the manner previously described, and the loaders and stoppers 21 are operated for delivering to the rollers or 'discs 42 and '48; from deck I5, a log to be barked. Those operations are quickly'performed so that a succeeding log is positioned beneath the nozzle head and is being rotated when the No, 1 solenoid valve H8 is again'energized The operation of the apparatus is thus largely "automatic and substantially continuous so that no time is lost, rendering possible comparatively great output.

As above indicated, the apparatus of my inven' tion isparticularly suitable for' barking logs "of large size which cannot be handled to advantage in barking drums or like apparatus. In-many instances, smaller logs can be barked to better closed.- By opening selectedones of the. switches 135, only thosenozzles .96 corresponding .to the:

switches [Edi-which remainclosed willbe operatedresponsive to operation of i the rotary switch I25. Accordingly, the-nozzlesmay be selectively.

operated-so I asto project water jets against only those-areas of-the log having adheringzpatches of bark. That-is advantageous as iteffects a saving in time as well as a in water. the operator may set the rotary timer switch- 125, while a logis-being'loaded onto thediscs Miand' 48,-:50 as to'actuate only those nozzles =96 which are to beused, thus avoiding, in manycasea. necessityfor-operatingswitch 25 throughacomplete cycle. Further, logs much shorter in length than the nozzle'head may be barked-for their full length by utilizingonlythwe 'nozzles extending the length of the log to bebarked, again efie'cting'a saving intime and in water.

I have-provided alead M0 extendingfrom con ductor I33 and "connected to all of'the leads 134:," betweenthe switches I35 'andthe solenoids I118,"

through switches rat The lead-I 40 has-inter posed-therein a switch: l 4! of suitabl'etypaishownfor "purposes 'rorillustration as :a ma mally :oper ate'd "switch. Theswitch 141 nonnallyis-open; as are the s'witches 1 35.

When it is desired to remove-from I an incom= pletely barked 10g 'a' patch of ba'r kpf consi'derablelength, or' sever al patches of bark, the appropriate nozzles aemayibe employed-for that purpose. "In' 'such casesggthe rotary switch [25 1s stopped its open position, placing theinozzles In that connection,

96 under control of switch Ml, which remains ing to the nozzles 96 which it is desired to use are closed, either successively or simultaneously, as desired. The nozzles 96 which are used are, of course, those which are disposed to project the water jets against the areas of the log at which the patches of adhering bark are locat ed. Alternatively, all of the switches 135 corresponding to the nozzles 96 which it is desired to use may remain closed, the remainder of the switches H35 being open, preliminary to closing of switch I 4!. Then when switch I4! is closed, the nozzles 96 corresponding to the closed switches I35 will be put into operation simultaneously. In either case, only those nozzles required for removing the adhering bark from the incompletely barked log will be utilized, thereby eifecting a corresponding saving in water and in time.

Under certain conditions, it may be desired '10 the nozzle head or of the log under treatment, in respect to both the nozzle and the water jet from a single nozzle. From what has been said, it will be clear that the log is not moved lengthwise during the barking operation. The

logs are quickly and completely-barked bysubto place all of the nozzles into operation simultaneously, By closing switch l ll, with all of the switches I35 closed, all of the solenoid valves H8 may be energized simultaneously, independently of the rotary switch I25, thus providin a continuous high pressure water jet extending the full length of theinozzle head. That may be desirable in certain cases, where it is important that a log'be completely barked or subjected to the high pressure water spray throughout its full length in the quickestpossible time. Normally, however, I prefer to use the spray of slight length relative to the nozzle head and traveling lengthwise of the log, since assurance is had that the spray impacts the log under adequately high pressure to assure thorough and quick barking thereof. From what has been said, it will be seen that the nozzles of the nozzle head may be operated successively, selectively, and simultaneously, either under control of the rotary switch I or under manual control, as desired or as conditions may require.

A control station as is provided at one side of the machine, from which station the operator can view the debarking operation. This station may be provided with a panel I 45 upon which may be placed the various switches and rheostats as well as other instruments, for regulatingand controllin operation of the apparatus in the manner above described. Obviously, the

equal to one twelfth of the head, and have referred to the nozzle as being of slight length relative to the head, and to the water jet from a single nozzle as being of slight length relative to the length of the log under treatment. It will-be understood that the length of the respective nozzles and the length of the water jet from a single nozzle may be varied. In general the length of the nozzle may be from one twelfth, or less, to a substantial fractional part of the length of the nozzle head, and the length of the water jet from a single nozzle may vary within the same limits, relative to the length of the log under treatment. Accordingly, the term slight length as used herein is to be construed as meaning a fractional part of the length of jecting them toa high pressure water jetfrom a stationary'nozzle head durin rotation of the log. In the method of my invention the log, during rotation thereof and without lengthwise movement, is thus subjected to the action of a plurality of high pressure water jets fsuccessively lengthwise of the log, "each of a length but a fraction of the length of the log and st'a tionary lengthwise thereof, with the efiective area of each jet overlapping the effectivearea of the next preceding jet. That avoidsnecessity for moving the log lengthwise, or for moving the nozzle head lengthwise of the log, with the advantages above noted. j

As above indicated,'changes'in detail maybe resorted'to withoutdeparting from the field and scopeiof myinvention, and I intend to include all such variations, as fall within the scope-of the appended claims, in this application in: which the preferred form only of my invention has been disclosed. I

Iclaim: 1.-In a hydraulic log barker, means for supporting a log to be barked in substantially horizontal position and rotating it about itsaxis' at predetermined speed and without endwise movement, a substantially horizontal nozzleheadremaining stationary horizontally and being provided with a plurality of jet openings arranged in a series lengthwise of said head, said openings being respectively disposed to project a high pressure water jet against'the log and'of fractional length relative to the total length of said head,'and means comprising'valves individual" to said jet openings and timer control zontal. position and rotating it about its axis at predetermined speed and without ,endwis e movement, anozzle head overlying said means "substantiallyparallel therewith and 'being adjustable vertically and restrained against horizontal movement, said head comprising a pluurality of juxtaposed nozzles respectively provided with a jet opening disposed to project against the log a high pressure water jet extending lengthwise thereof with the areas of theijets from adjacent nozzles overlapping, valves individual to the respective nozzles and controlling admission there'- toof Water under pressure, and timer control means for operating said valvessuccessivelyin timed relation to the rotation of the log andeffective for producing a high pressure water jet traveling lengthwise of the log. I V

3. In a hydraulic log' barker. means for supporting a log to be barked in substantially horizontal position and rotating it about its axis at predetermined speed and without endwise movement, a nozzle head overlying said means substantially parallel therewith and being adjustable vertically and restrained against horizontal move,- ment, said head comprising a plurality of juxtaposed nozzles respectively provided with a jet opening dispo ed; "to

' substantiall head; and dispose.

project against. the log; a

pr sure water je extending len thwi thereof; with the. areas ofrthe j ts from. adjac nt nozzles overlapping, valves individual to the readmission ther means comprissn ti-v nozzlesand con rol-lin toot water under. pressure" and timer control means and manual contro means "for operating; said valves selectively and succe s vely,- --rotation ofythe 19s,: uccessive opera ionor s i .val-ves being efiective for producing a hi hpresonti na1ly-,--in timed, relat on o. th

surarwa eriet traveling; lengthwise of: t e. le

" a; a. hydraulic log barken. means. for sun- :to be barke .in subs an ially hor a. position. and r tatin er ined sp ed and. wi h ut n w e movea .ozzl-e head overlyin said means su .st al-lvpara lel. therewith and b i g. adjustabl v r. eallv and. res ra ed a n t; horizontal m vement, said head comprising a plurality of -i Xtansed n zz es respectively provided with a p ning disp sed. to proj ct a ainst. the lo a hi pre sur wa erje extend ng l n hwis thereof, with the; areas of the jets from adjacent nozzles. overlapping, valves individual to the respective nozzles and-.co ntroll -i-ng admission thereto of water under pressure, and means; comprising timer control means and manual control means. for operating said valves selectively, .Suc-

.cessive'ly, and simultaneously, optionally, in

timed relation to the rotation of the lo 5. In. a (hydraulic, log barker; means :for supporting. a lo to. be barked in substantiall horizontal'position and rotating it. aboutrits axis, .a itizontal; nozzle head comprisin a. plurality of. mdependentxnozzles 1 having l openin sarr ed a -series: lengthwise or, said to proiect a high pressure wateriet a ai st: he log with the. jet from each nozzle overl ping the jetsrrom: the next adjacent.:noz,z les. lengthwise, or the log, control valves individual to. saidqnozzles .tor cutting off and establishin supply 0i Water under pressure thereto, and means, for operating said valves =Q0mprisihg: a i r switch; effective. for opening saidvalves: uc essivel lengthwise of said head for predetermin d time. period. and closing .them successively lengthwise r said; head,

6i, In. a. hydraulic log barker, means for supe rnn a log to, be b rked in u stantially horizontal position and rotating it about its axis, a Substantiall horizontal nozzle head compr .ng

.afpluralitypf. independent; nozzles having-inlet openingsv arranged. in. a series lengthwise of saidhead and disposed to project a high pressure water jet against the log with the jet from each nozzle. overlapping the. jets from. the next adiascent. nozzles lengthwise of the log, control valves individualto said nozzles for cutting frand establishing .supp y of water under pressure thereto .andmeans. for perating said valvescomprising a timer. swi ch and switches individu to said valves whereby the latter may be operated selectively and successively l thwise f. sai .head whil nd r control of said timer switch.

'7. 'In a hydraulic. log- .barker, means for supporting. a log to be barked in substantially horizontal position and rotating it about its axis, a substantiallyhorizontal nozzle head compri in a plurality of. independent nozzles having jet openings arranged in ,a series lengthwise of said head and disposed. to. project a high pressure water jet againstthe log with the jet fromeach nozzl verlapping thejets from the next adjacent hamlesleiiethwise If the log, control valves it. aboutv its axis at,

individual to said nozzles for cutting on and establishing supply of water under pressure thereto, means for operating said valves comprising a timer switch effective for opening said valves; successively lengthwise of said head for a predetermined timev perio and closing them successively lengthwise or said head, and manual control means for o erating said valves independently of said timer switch comprising a main controlswitch connected shunt with said-timer switchqand switches individual :to. said valves.

8. Ida hydraulic log barker, means for supporti g a l g; to bebarlt d in substantial y horizontal position and rotating it, about its axis, a substantially horizontal nozzle head c mprisin a plurality of independent nozzles having jet openings arranged in a series lengthwise vof'said head and disposed to project a high pressure water jet; against the log with the jet from each nozzle overlapping the jets, irom'the next adjacent nozzles lengthwise of the log, control valves individual to said nozzles for cutting on and establishing supply of water under pressure thereto, means for operating said valvescomprising a timer switch and switches individual to said valves whereby the latter may be operated selectively and successively lengthwise of said head under control of said timer switch, and manual control means for operating said valves independently of said "timer switch comprising a. main control switch connected in 'shunt'with said'timer switch and switches individual to said valves.

9. In a hydraulic logbarker, means for supporting a log to be barked in substantially horizontal position and rotating it about its axis without endwise movement, a nozzle head extending length-wise of said supporting means substantially parallel therewith and stationary lengthwise said nozzle head having a, plurality of juxtaposed jet openings disposed to project against the log a high pressure water jet extending lengthwise of, the log with the areas or" the jets from adjacent openings overlapping, valve means effective for opening and closing said jet opemngs individually and successively andthereby projecting against the log a high pressure water jet traveling along the log lengthwise thereof, and timer .means for operatingsaid valve means.

10. In ahydraulic log barker, means for supporting a log. to be barkedrin substantially horizontal position and rotating it about its axis at substantially constant predetermined speed and without. .endwise movement, a nozzl head extending lengthwise of said supporting means substantially parallel therewith and stationary lengthwise, said nozzle head having a plurality of juxtaposed jetopenings disposed to project against the log a high pressure water jet extending lengthwise of the log with the areas of the jets from adjacent openings overlapping, valve means effective for opening and closing said jet openings individually and successively and thereby projecting against the log a high pressure water jet traveling along the log lengthwise thereof, and means comprising timer means effective for operating said valve means in timed relation to the speed of rotation of the log.

HERBERT W. GUETILER.

-(R ef.erences on following page) REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date Witham Sept. 3, 1918 'Stringham June 5, 1928 Taylor Oct. 8, 1940 Shaw Jan. 4, 1944 10 Number Number Name Date Hertz Mar. 27, 1945 Swift Nov. 16, 1948 Holveck et a1 Feb. 20, 1951 Holveck et a1 Dec. 18, 1951 Holveck et a1 Feb. 26, 1952 e FOREIGN PATENTS Country Date Germany of 1931

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