US1575070A - Log carrier - Google Patents

Description

' mmh 2 1926.

, A. W. LEWIS LOG CARRIER Filed D80 il' lil lar/110mm!" 1I Irl) ll n W7. u mwf 4.. .v4 2 7 MQMMM 4 L?. 4b w 4 Patented Mar. 2, 1926.

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Los CARRER.

Appneatio :neav` December 3, 1924. serial No. 753,698.

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B it known that I, ALLAN VVAinnn LEWIS, a subject of' the King of Grreaty Britain, and alresident` orthe citf lof Vancouver, in the Province of British olumbia, Canada, have invented certain new and usefullmprovements in Log, Carriers, of which thc followino'` is a specification: u

1y invention relates to improvements in log' carriers, with more' particular' reference yto marine'car'rieis by the use of which large' bodies of logs may bef transported -with great safety; facility, and economy and with greater speed,v from the loading gronnd kto the discharging point' in such manner that the loss of logs which frequently' occurs through breaking-up in heavy Weather oit' the rafts into Whichtheyuare formed accord ing to thevpractic'e at the present time ior' transportation is Ventirely prevented,-

l attain this object 'bythe construction illn'strated in the accompanyingdrawings in 'whichy Y Fig; lis a side vie-W of the' log` carrier.

c Fig; 2 is aside view of the carrier, in sec-4 tional elevation', through the" longitridinal centre lin'e, unloaded.

Fig. 3 is a -viev of the carrier similar to Fig. 2, loaded;

Fig- A 4 is a planvview.

Fig. 5 f through theline 5'-5 of' Figi' 3.

Fig.Y 6 is a cross sectional view taken in front of the after compartment bulkhead a portion of which is partly broken away.

Similar larparts throughoutthe several views.' ,p

The carrierA consists of "a loat'ng hull l, which may be bilt specially for' thepu'rpose, or may be an old hull withits construction modified to suit, having watertight coinpartments' 2 -and- 3 at the bow and stern l which may befilled with Water through sea inlet valves 4 and' 5 Within the compartmentsrand controlled and operated byl suitable rods 6 and 7 respectively extending above the deck and fitted with liandwheels S and 9; The portion of the carrier between the bow and stern compartments is uncovered andiorms an open lrold, indicated generally by the numeral l0, which is si'ibdivided, in the carrier illustrated, into three compartments 111,12, and 13', by strong` transverse bulkheads 14 and 15, as shown 1n Figs. 2 and 3.

ys a' cross',sectionalv view taken Y figures of reference Vindicate simi;

respectively locatedv depth of the hold 10 is' preferably about i2 ariennes ai@ depth dimessa and sterncompartments.2 and 3 andeXteIid'- ingl longitudinally over the hold on the centre line of, the same with its upper side slightly above the level of the decks of. compartn'ients 2 and is a deep lagirder 16 which being strongly connected at its opposite ends to the compartment bulkheads and general structure stiffens the entire carrier and also acts as a communicating bridge betiveen the fore and aft ends oi the carrier. The bulkheads 14 andl, which are non\vatertiglit, entend at their upper edges to the underside of the girder 1-6 andare rigidly connected thereto in anyk approved manner, and these biilkheads are preferablyspaced so that the conipartments 1l, l2, and 13 are of different lengt-hs;V in the carrier shown, liowever,.the middle and after compartmen't's l2 and 1.3i are of the same' length ivhile the forward compartment ,ll is of less length than the other two'. Each compartment, however,-

may be oia different length to the others, which enables logs or different lengths toV be loadedlaboard the carrier compactly and with great convenience.

The oppositesides of each of the coinpartinents 11, l2 yand 13 are stiiene'd' by means vor' longitudinally channel bars 17-1S, 19420, and 2l-22, which are laid transversely across the bottom of the respective 'compartments kivith the iange edges uppermost and carried up thew sides of thecompartments and over theY op-` posite edges of the saine, being then carried down on the outside as at 23 for a distance of about lpl'eet. It Will-of course bc linderstood tha these channel bars are rigidly secured to the main structure in accordance with the best marine practice andA `notv only do they act as stiil'eners but the transversea portions, one of which is indicated byy the numeral 2l in Fig. p 5, forms supports on which the Weightlot' the log load` in each compartment is carried up clear oi' the bottom of the carrier proper. l

Adjacent the upper edgesv of the hold 10 and preferably secured to they respective channels are'rings 25, to cachot which is connected one end of a chain 2G the opposite end 'of which is provided `with any suitable form of trip hook 26 adapted to engage a ring 27 secured to thel girder i6 and Vfasten the chain over the top of' the logload, as indicated in Fig. 5, there being one ring 27 foreach chain 26.

spaced .pairs of y In order to provide for the pumping out of the Water in the compartments 2 and 3 and the hold l0 a centrifugal pump 2S is mounted in compartment 3, the pump shaft of which is provided With a sprocket 29 chain-connected by a chain 30 With a suitably mounted sprocket 3l which may be operated by a donkey engine 32 mounted on the after deck of the carrier, which engine is provided With a suitable drum mechanism, indicated by the numeral 33, for loading the logs into the several compartments, as hereinafter described, a pair of cables 34 and 35 being Wound on the drum and passed at their free ends through a suitable block 36V Which may be connected at Will to eyed members 37, 38 and 39 secured to the girder 16 according to Whichever compartment is to be loaded.

40 indicates a suction valve box Within the compartment 3 connected to the suction side of the pump 28 having a valve box 41 controlling a suction pipe 42 leading along the bottom of the carrier to the for- Ward compartment 2 and passing under the transverse channels 24 and Within a longitudinally arranged channel 43, a valve box 44 controlling a pipe 45 opening into the hold 10, and a valve box 46 controlling a pipe 47 opening into the compartment 3, all these valves being opened or closed as required by suitable rods 48, 49, and 50 respectively extending above deck and fitted With suitable operating handles 51,

' 52, and 53.

54 indicates a deck controlled valve for admitting Water into the hold 10, While 55 indicates the centrifugal pump discharge ipe.

p The manner in which the carrier is used may be brieiiy described, it being understood that When light and unloaded there is no Water in either of the compartments or in the hold l0. lVhen loading Water is admitted until the carrier is submerged sufliciently to bring the edge of the hold to Within about one foot from the sea level, so that the logs floating alongside may be hauled over the edge of the hold, rolling on the edges of the channels, by the cables 34 and 35 operated by the donkey engine Without any dead lift, since they are carried up by the sea outside the hold to the height at which they are transferred into the oompartment, in which they are also carried up by the Water therein and after the first tier is loaded the other tiers are carried up both by the tiers below and by the Water in the hold in which they are floating, the hold Water being gradually displaced as the loading proceeds by the logs or if necessary being gradually pumped out by the centrifugal pump so that when the compartment is fully loaded it is then free from Water, from all of which it Will be seen that at no time during the loading is there any undue strain on the donkey or the cables as the deadweight of the logs is carried by the Water both inside and outside of the hold.

Then the loading is completed in each compartment the carrier is then towed to the discharging point, the -load being secured meanwhile by the chains 26, and it should be here noted that if bad Weather be encountered or for other reason Vstraining of the hull be feared due to the log load the Weight of the same may be taken oif the hull bottom by pumping some Water into the hold to carry the log body up against the chains clear of the bottom so that the same is relieved of the Weight of the log load.

On reaching the discharging point the chains 26 are let go and Water admitted into the hold and the compartments so that the logs float freely out of the hold as the carrier sinks deeper in the Water, and as the carrier may be submerged to Within 2 feet of theY deck level to bring the hold entirely under Water it Will be seen that every log may be readily discharged therefrom by floating it out. The carrier is then pumped out as to both compartments and therhold ready for towing back to the loading ground again, and it Will be observed that due to the provision of the valves pipes 42, 45 and 47 connected independently to the separate compartments 2 and 3 and the hold 10 complete control of the trimming of the carrier or the respective depths to which it may be sunk for loading or unloading is obtained. It should also be noted that, if desired', the carrier may be further stiifened by passing bands 56 completely around the hull in line with the bulkheads 14 and 15 and carrying the same over the girder 16.

From the foregoing it will be seen that I have devised a highly practical and efficient means for transporting large bodies of logs from place to place with great safety and economy.

vWhat I claim as my invention is i* 1. A log carrier comprising, a hull having an open hold extending throughout the major part of its length and Water-tight compartments at its ends, adapted under Water admission Ythereinto to sink to varying depths including total submergence of the hold While remaining buoyant, said hold having spaced channels extending transversely across but clear of the bottom of the hold and continued up the sides and over its opposite edges.

2. A log carrier comprising, a hull having an open hold extending throughout the major part of its length and Water-tight compartments at its ends, adapted under Water admission thereinto to sink to4 varying lll) depths including total submergence of the hold while remaining buoyant, a longitudinal girder extending centrally over the hold between the compartments, spaced transverse bulkheads in the hold extending at their upper edges to the underside of the girder dividing the hold into compartments, and spaced channels in each compartment placed with their flange edges facing into the compartment extending transversely across the bottom of the same continued up its opposite sides and over its opposite edges.

3. A log carrier comprising, a hull having an open hold extending throughout the nia-- jor part of its length and Water-tight compartments at its ends, adapted under Water admission t-hereinto to sink to varying depths .including total submergence et' the hold While remaining buoyant, a longitudinal girder extending centrally over the hold between the compartments provided on each side with rings at spaced intervals, spaced transverse bulkheads in the hold extending at their upper edges to the underside of the said girder dividing the hold into compartments, spaced channels in each compartment placed with their flange redges Jfacing into the compartment extending transversely across the bottom of the same continued up its opposite sides and over its opposite edges, and chains secured at one end to the respective channels adjacent the upper edges et the compartments, each chain being provided at its free end With a trip hook and of length to be engaged thereby to one ot' the aforesaid girder rings.

4. A log carrier comprising, a hull having an open hold extending throughout the major part of its length and watertight compartments at its ends, adapted under Water admission thereinto to sink to varying depths including total submergence oi the hold While remaining buoyant, a longitudinal y girder' extending centrally over the hold between the compartments provided on each side with rings at spaced intervals, spaced transverse bulkheads in the hold extending at their upper edges to the underside oi' said girder dividing the hold into compartments, spaced channels in each compartment placed with their tlange edges facing into the compartment extending transversely across the bottom of the same continued up its opposite sides and over its opposite edges, chains secured at one end to the respective channels adjacentthe upper edges of the compartments, each chain being provided at its free'end with a trip hook and of length to be engaged thereby to one of the aforesaid girder rings, means for admitting water into either of the hull end compartments or the hold, and means for pumping the Water out of either compartment or the hold.

5. Al log carrier comprising, a hull having an open hold vextending throughout the major part of its length and Water-tight com partments at its ends, adapted under Water admission thereinto to sink to varying depths including total submergence ot the hold While remaining buoyant, a longitudinal girder extending centrally over the hold between the compartments provided on each side with rings at spaced intervals and on its upper face with longitudinally spaced eyed members with any of which a block may be connected, spaced transverse bulkheads in the hold extending at their upper edges to the underside of the girder dividing the hold into compartments, spaced channels in each compartment placed with their flanged edges facing into the compartment extending transversely across the bottom of the same continued up its opposite sides and over its opposite edges, chains secured at one end to the respective channels adjacent the upper edges ot the compartment, each chain being provided at its Jfree end With a trip hook and of length to be engaged thereby to one of the aforesaid girder rings, means for admitting Water into either of the hull end compartments or the hold, means for pumping the Water out of either compartment or the hold, a suitably operated drum mounted on the deck of one of the end compartments, and a pair olf cables Wound at one end on said drum their free ends being passed through a block adapted for connection to any of the eyed members aforesaid.

6. A log carrier comprising, a hull having an open hold extending throughout the major part of its length and Water-tight compartments at its ends, adapted under Water admission thereinto to sink to varying depths including total submergence of the hold kwhile remaining buoyant, said hull being provided with a longitudinal girder extending centrally of the hold betvveen the compartments, and longitudinally spaced bands passed around the hull and the girder.

7. A log carrier comprising, a hull having an open hold extending throughout the major part of its length and Water-tight compartments at its ends, adapted under Water admission thereinto to sink to varying depths including total submergence of the hold While remaining buoyant, said hull being provided with a longitudinal girder v extending centrally of the hold between the compartments, spaced transverse bulkheads in the hold extending at their upper edges to the underside of the girder, and bands passed around the hull and the girder in line with the said bulkheads.

Dated at Vancouver, B. C., this 26th day of November, 1924,

ALLAN VALTER LEVIS.

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