Cap mechanism for treating felled green timber
United States Patent 2109467

2 Ulaims. My invention relates to a cap mechanism for treating felled green timber containing its natural sap. More particularly, my0 invention. relates to a cap adapted to be applied to the butt end of the felled. green timber containing its natural sap, which timber may be of varying diameter,...

Clapshaw, Myron M.
Application Number:
Publication Date:
Filing Date:
Mineralized, Cell Wood Preservi
Primary Class:
Other Classes:
24/273, 24/280, 118/502
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2 Ulaims.

My invention relates to a cap mechanism for treating felled green timber containing its natural sap. More particularly, my0 invention. relates to a cap adapted to be applied to the butt end of the felled. green timber containing its natural sap, which timber may be of varying diameter, and. which cap is. connected to a reservoir of chemicals Under pressure, so that the chemicals may be forced through the longitudinally directed ducts of the said timber.

The tendency to decay in the case of. telegraph poles, pilings, ties, and in fact all wood units which come in contact with. the: elements, such as soil, water, or air, or any combination thereof, or are exposed to the. action of termites, teredoes and other wood destroying insects or borers, is well. known. The replacement cost is tremendous, besides the unnecessarily premature destruction of an important natural, resource is involved. Accordingly, many attempts have been heretofore made to overcome this objection, all of which involve expensive operations, and a expensive treating plants and expensive-transpora e tation due to reshipment of the timbers after treatment.

Heretofore many cap devices have been sug- t] gested as the means secured to-the end of the a: log in which- means the treating solution to be o] forced into the log is subjected, to pressure to of 30.}Pass the treating solution through the sap and or portion of the timber longitudinally of-the cell mi structure, but when it is attempted-to apply them- stl to commercial use, it is found, that they embody hi] serious objections which make them, impossible ble IS of use. fel When made of iron they are subject to attack- ab by the chemicals forming the treating solution of, and metal walls cannot be readily forced. into par liquid tight seal bearing on the pole without, bev- ful D eling off the end of the pole and thereby block- the nug off part of the. sap wood portion of the pole tus from treatment. Particularly does this result ber when the metal cap is of truncated cone form app which form. is employed to adapt the cap to be con applied to poles of varying diameters it Air pockets must be avoided and when air the venting means is suggested in the prior- art de- sam, vices, they are with difficulty separately adjust- is in able to Poles of a given diameter, which renders char the operation too costly due to the time con_ dent sumed. whic On the other hand when material as rubber is thro proposed- to overcome the chemical effect of the This treating solution and the rubber cap of there-, provi quired elasticity to fit, varying diameters of Poles theP (Cl. 21--71), is shown of the design- heretofore suggested the caplacks strength to sustain the Pressure which becomes more than fifteen hundred Pounds on a Pole of 18 inch diameter with a 7 Pound-pressure per square inch.

Also when a rubber, capis formed of vulcanized 5ý fabric and rubber, the means heretofore designed for clamping it upon the. pole which may have its bark on involves Puckering when it is cinched so that a liquid. tight seal is not obtained. And even when the cap is applied to a peeled Pole10, the surface is uneven: and the same. objection develops as set forth immediately above., Primary purposes of my invention are to provide a cap apparatus by means of which, to carry 15 out the-process for treating felled green timber with chemicals at or near the site where the, same is cut:.and then shipped direct to the point Of use; And which cap- means overcomes the objections above mentioned. This application is a continuation in-part of 20o lpplication bearing Serial No.673,415, for "Procss of Preserving green timber, etc." For purposes of definiteness and. illustration I ill describe- my invention, as applied to the reatment of, poles, piling, ties and other wood 25 rticles, or to such timbers from which said ties, r lumber, or veneer are to-, be cut, where the use such Products requires non-water absorbing non-decaying Properties, or to be resistant to arine boring animals or to termites or wood de- '0 0toying insects, or where it is desirable to probit excessive, season checking and other troues which arise in dry kilning. In treating green led timber in accordance with7 the process 3ve identified, it is important that every part the sap wood.structure be treated, i. e., so no 't is left. untreated. This, requires the care-. elimination of all air pockets developing in cap- apparatus. Also it requires an apparawhich, may be adjusted to the ends of tim- 40J s of var-ying diameters. Furthermore, such aratus must be of a light weight but strong struction as it must sustain high pressures and lust. be capable of being handled readily by 45 operators to avoid delay in attaching the e to the poles for treating. Furthermore, it iportant that the cap be of a flexible elastic acter to Partially absorb the pulsations incito the Pumoing operation, by means of h the chemicals in solution are forced ', gh- the longitudinal ducts of the timber. avoids undue strain upon the Pump and des for maintaining a constant pressure on lid, whereby the. treating of the Pole is g5 facilitated. And only a steady flow and pressure is maintained on the cell walls such as to prevent reaction between the treating solution and the sap in fact or in the presence of the sap.

The above mentioned general objects of my invention, together with others inherent in the same, are attained by the device illustrated in the following drawings, the same being preferred exemplary forms of embodiment of my invention, throughout which drawings like reference numerals indicate like parts: Fig. 1 is a view in side elevation of the end portion of pole and an apparatus attached thereto for impregnating the said pole with the preserving solution; Fig. 2 is a view in vngitudinal section o Fig. 1; Fig. 3 is a view in longitudinal section of the pole with bark removed to form a bearing for the cap; Fig. 4 is a view of a modified form of cap securing means by which the cap is held with a liq uid tight seal against the timber, either with th, bark in part thereon or on the peeled pole; Fig. 5 is a view in perspective of the tightenin member for the cable or cap engaging means c said securing means of Fig. 4; Fig. 6 is an enlarged end of one end of t1 cable; Fig. 7 is a view of the cable clamping plate said securing means; Fig. 8 is a view of a modified form of cap a: choring means; Fig. 9 is a view of still another modified fo of a cap anchoring means; Fig. 10 is a blank of rubber coated fabric which the body of the cap is formed; Fig. 11 is a blank of a rubber coated fabric which the end portion of the cap is formed; Fig. 12 shows the mold on which the body bli is positioned; Fig. 13 is a view in cross section of the modi form of a pole cap formed of elastic mate embodying my invention; Fig. 14 is a view in perspective of a reinf ing cap to encase pole treating cap shown in 13.

Fig. 15 is a plan view with parts brokenE of the cap securing means shown in Fig. 4.

Fig. 16 is a view in perspective of a moc form of the tightening member for the cable cap engaging means; Fig. 17 is a view of a modified form of ca gaging means; and 55 Fig. 18 is a view in cross-section on dotte, In causing the reaction of the solution the sap of the felled green timber, the a; tus shown in the drawings is efficient and r 60 cal, and provides for a thorough and ur treatment of the timber. The cap 3 is s to the end of the pole 4. The end of th is partially trimmed to form a more or less s or uniform bearing portion 5 for the cz providing this bearing 5 it is preferable t' a part of the bark upon the pole and ne it to the wood structure entirely. This p for a thorough impregnation of the ch throughout the portion of the pole treE 70to the bark. An extra supply of chemici locate between the bark and the woody st: This is particularly advantageous where, is to be used as a piling with the bark There is no necessity for beveling off th lar edge of the pole, and particularly want to cut the sap wood. The form of the cap of my invention is such as to provide for fitting upon poles of varying diameters without such cutting, and at the same time of a form to prevent air cutting off access of the liquid to the sap wood disposed to the upper part of the butt end of the pole, as well of a rubber fabric material which is non-reacting with the treating solution and flexible so as to be secured with a liquid tight seal to the pole. The cap is of a form having practically a 900 angle 6 between the side 1 and the end wall 8, while the angle 9, i. e., the angle between the end wall 8 and the side 10 is preferably obtuse.

In longitudinal section the cap has substantially the form of a truncated cone, having the top side perpendicular to the plane of the ends. That portion of the cap which is attached to the log is herein termed the base portion, while the opposite end portion is called the top portion. That part of the cap which is substantially in line with the top of the log lying in general in a horip zontal position is referred to herein as the upper portion of the cap. The cap may be secured in g position on the end of the pole by means of a wire f cable or other similar means , the ends of whic are secured by a cable tightening means 12. Also me a further securing means may be employed in the form of a U shaped member 13 having spears of or dogs 14 which may be driven into the timber to insure the fast securing of the cap to the a- end portion of the pole when the solution in the cap is subjected to pressure. It will be under:m stood that the continued pumping of the fluid to the cap creates a vibration that will graduof ally work the securing means loose so that it is not liquid tight unless particularly efficient seof curing means are provided.

An air escape valve 15 is provided in the upper Ink wall portion of the cap so that air pockets will not form and prevent the chemical solution from fled having full and free access to the sap wood part rial of the log in the upper part of the log. Also an inlet conduit 16, which has valve 17, is attached orc- to the lower part of the top portion of the cap Fig. so as to serve also as a means for draining off the unused chemicals down to the level of said tway inlet conduit when the treating is completed.

The remaining liquids may be readily caught in a lified vessel upon loosening the securing means 12. Si.e. The conduit IG connects with any suitable confined receptacle in which the treating solution is p en- contained, and to which said solution fluid pressure may be applied. Upon opening the valve d line 11 the solution runs into the cap 3 and any confined air is then permitted to escape through Swith valve 15 so that the cap 3 is completely filled with Ipara- the treating solution. When the cap 3 is comiracti- pletely filled with the treating solution the air liformn venting valve 15 is closed. During the treating 6C Scured period as the solution is pumped or otherwise .e pole supplied under pressure to the cap, air collects ;mooth and the venting of the air must be repeated from 6p. In time to time to positively avoid allowing a pocket o leave of air to form. The fluid pressure exerted upon 6 ,t strip the treating solution is preferably between 5 and rovides 25 lbs. The magnitude of the pressure obviously emicals depends upon the density of the particular wood ated up being treated and the length of the said poles to als may be treated.

ructure. In Fig. 4, a modified form of a cap securing the pole means, with parts broken away, is illustrated as left on. applied to a log. This is preferred to the form e annu- shown as element 12 in Fig. 1. The wire cable 1h T not II becomes very much kinked by the clamping it is difficult to employ it to bind the base of the cap to the log with a liquid. tight seal] In the modified form, an arc-shaped plate. 98 on5 gitudinally considered isshown- having a flange 19 with a claw member 20 ,disposed with rod 21: sextening tharoh opening 22 in the flange I' so that a nut 23 may be'employed to .draw clamp member 20:toward the flange, Clawdmember 20 -has a transversely. directed: plate 24; see Fig 5, and a pin 25 disposed to slide in. a slot: 2:* in Plate 18. At the opposite- end ofi tlhe plate 18 there is a clamping plate 27 having a groove- 2 and bolt holes 29. A cap engaging means as- a wire cable 30 is provided with an enlarged end Portion 31 which is disposed within the claws of the claw member 20. The round surface of the cable rovides an enlarged bearing surface in cinching the cable to the depressible cap 20'walls. In being applied the cable is then Placed around the base portion of the cap-inpositi nona t the log 4 and beneath the flange - 9- and throug-h groove 28. Then bolts. 3: are. drawn tight so f that the cable 30 is clamped tight against the- t 25"-Plate 18. Thereupon the cable is. drawn to a very tight fit upon the cap by applying a wrench to nut 23 and drawing forwardly the claw mem- t ber 29. The plate 24, together with pin 26; op- ti erates to keep the claw member 20 from turning ti 3 axially. The plate 24 has a bearing against, the di underside of substantially the entire width of:the p( plate 18* 59 In place of driving dogs i4 into the-log as-shown in Fig. 1, to provide an-anchoring means for the- sh 35cap 3, it is preferable not to rupture the - bark 30 and. the wood structure therebeneath, because va all such openings permit the-escapeof the treat- feo ing solution. To avoid this, varying types of 61, .anchoring means are Provided such as are i- aft 10ilustrated in Figs. 8 and 9. In Fig. 8 an anchor.- ( ing chain 32 is provided with a cinching means cal in the form of a lever 33, in one end of which ria is a hook 34. A tightening member 35 may be ing Pivotally secured to lever 33. A Plate 36 having Pro 5 a flange 37, through a hole 38 in which flange abh member 35 is caused to extend, having nut 39. logs At spaced intervals on chain 32, are short chain vide lengths 40. The anchoring chain 32 is Placed buc around the log some 18 inches or two feet from cap the base of the cap 3. Thereupon lever 33 is a su forced back and secured down by hook 41 to in F chain 32. Member 35 with nut 39 Provides for In further tightening adjustment if necessary In port: general the position of such an anchoring means, whic with respect to the cap, is shown in Fig. 14. A but somewhat similar chain anchoring means is othei shown in Fig. 9. The lever 33 is omitted here In and a hook 42 with an upturned flange 43 is enini Provided with an opening 44 through which pin the I or tightening member 45 extends, which likewise in pI passes through a flanged plate 46. Nut 47 serves In as an adjusting means to draw Plate 46 towards mean hook 42. The plate 46 is secured to an anchoring with chain 48, which chain has, at spaced intervals, porti short laterally disposed chain members 49 with tact l hooks 50. Ob In Fig. 10 is illustrated a blank 51 for form- the fo [ng the body portion of the cap 3 on the mold Parts nember 52 shown in Fig. 12 This blank con- cates ;ists of a fabric with rubber coating on both sides ciple t )f a thickness to Provide movement with respect ferred o the superimposed fabric plate. Overlapping I cia ,ortions 53 and 54 are provided on each end of i. A he blank 51 to provide the joint. bodyin In Fig. 11 a cap blank 55 is shown to form the fabrin '. wail 8 of the cap: Notches. 56 enablethe Peripheral portion 57-of1 the- blank 55 to extend Over the blank 55 to extendp ver the blank 5, frming the body. ortion, as will be readily unders tood.

The blanks 5 : are placed upon-: the moldr 52,. and the edges 53 and 54 are caused to: overlap,; and then a second blank, exactly like 51, isadded, however with the joint laced at a 120 Position with respectj to the first joint; andPa thirdblank 5.1 is added with its joint spaced:240a from the a firstjoint. After the adding of eachofhthe abovejoints, the cap 55 is added and the notches 56 are Placed in staggered relation with respect tothe notches of underlying blanks 55, so that the notches or joints are not directly superimposed. The assembly is then vulcanized into a uni. leaving "live" rubber between the fabri mebers. Since at the joints there is manifestly a ouble thickness of the rubber and between:each abric member there is rubber it results that 20 here is more or less elasticity provided in the inished cap.and the cap walls as a whole are lexible. This provides for, cinching:the cap walls o the uneven surface of the pole bark or pole ith a substantial bearing and aliquid tight sea!. 25 In Fig. 13 a modified:form of cap is shown. In lis instance- a cap body 58 is rovided of relavely high elastic rubber, so that the base poron may be adjusted to the butt ends of poles of fferent diameter by merely stretching the base 30 )rtion. This cap is provided: ith an air valve Sand a. fluid inlet conduit e. A. cap securing eans in the form of a cable, preferably wire is own at 6 . This may be of the type of cable , With associated clamping plate 13 and its c5 rious members as illustrated in Fg, 4. Mani;tly,o a cable of hemp mybe used for means and may be drawn very- tight by being wetted ier being placed in Position on the cap.

Over the cap body 58 is placed a reinforcing 40 S62 (Fig. 14) of relatively- non-elastic mate. This reinforcing cap is. Provided with.lacmeans 63 so as to adjust the said cap to fit Perly over cap 48, the fitting being prefere on account of cap 58 being adjustable to 45 s of different diameters. An opening 64 is pro,d for conduit 60. Straps 65 with cinch kles 66 and hooks 67 are Provided to secure 62 to anchoring means 68, which may be of itable type, such, as for example, as is shown 60 igs. 8 and 9.

M Fig. 15 the plan view is shown of the end ions of the cap engaging means of Fig. 4 h lie side by side or in overlapping relation however, not necessarily crossing over each 55 Fig. 16, is shown a modified form of tight, means 69 which has flanges 70 to engage ateral edges of Plate 18 and has hook 71 ace of a claw as member 20. 60 Fig. 17, a modified form of cap engaging s in the form of a band 72 of spring metal a raised portion 73 (Fig. 18) which raised n assists in establishing a liquid tight con)etween the cap and the timber. 65 iously, in general changes may be made in 'rms, dimensions and arrangements of the of my invention, unless the context indiotherwise, without departing from the prin;hereof, the above setting forth only pro- 70 forms of embodiment.

device of the character described, emg a flexible Pole treating cap formed of reinforced rubber walls, said cap having 75 2,109 4 a pliable circumferential edge portion conformable under a binding cable with the uneven circumferential bearing of exposed sap wood of a felled tree to form a liquid tight seal and a cap Ssecuring means having a cap engaging means, a securing plate, the end portions of said cap engaging means overlapping directly beneath said plate over an arc of such length as to bring the secured ends substantially beneath the line tan: gent at the point in about the middle of the arc beneath said plate of said cap engaging means.

2. A device of the character described, embodying a cap formed of flexible, elastic vulcanized wall, said cap being of truncated cone form i) in longitudinal section, said form rendering the base portion capable of being fitted to logs of varying diameters, the upper wall portion of said cap being substantially in line with the upper portion of the log; and an air escape valve disan posed in said upper wall portion in the end portion of the cap removed from the log.

3. In a device of the character described, a pole cap securing means comprising a cap engaging means; an arc shaped plate having at one : end a cap engaging means tightening member and on the other end, a clamping means for on end of said cap engaging means, said arc shapec plate being of such length as to cause the en portions of the cap engaging means to lie sid :; by side and to cause the secured ends of the ca: engaging means to lie positioned substantiall beneath the line tangent to about the middl point of the arc beneath said plate of said ca engaging means.

:. 4. In a device of the character described, pole cap securing means comprising a cap ei gaging means; an arc shaped plate having flange on one end with a hole therethrough, ai a longitudinally directed slot in said plate; a c: 40 engaging means tightening member having a P operatively positioned in said slot and a cls member on one end and a threaded portion ,467 one end, which threaded portion extends through and in operative engagement with the walls of the hole in said flange; and a cap engaging means clamping plate and means to secure said plate to the end of said arc shaped plate opposite to the flange end of said arc shaped plate, said plate being of such length as to cause the end portions of the cap engaging means to lie side by side and to cause the secured ends of the cap engaging line tangent to about the middle point of the arc beneath said plate of said cap engaging means.

5. In a device of the character described, a pole treating cap formed of a pluralitY of superimposed fabric blanks having vulcanized rubber coated faces the said rubber coating being elastic to permit movement of one blank with respect to the other.

6. A device of the character described, comprising a pole treating cap formed of live rubber of high elasticity and pliability, whereby said cap is conformable under a binding cable with the uneven circumferential bearing of the exposed sap wood of the felled tree to form a liquid tight seal; an air escape valve disposed in the upper wall portion thereof; means to secure said I cap upon the pole; and a reinforcing cap of flexd ible non-elastic material disposed over said pole e treating cap.c S~7. A device of the character described, corny prising a pole treating cap formed of live rubber e of high elasticity and pliability, whereby said cap p is conformable under a binding cable with the uneven circumferential bearing of the exposed a sap wood of the felled tree to form a liquid tight i- seal; an air escape valve disposed in the upper a wall portion thereof; means to secure said cap id upon the pole; and a reinforcing laced cap of ap flexible non-elastic material disposed over said 40 ,in pole treating cap. YRON M. CLAPSHIAW.