US1249153A - Log-loading boom. - Google Patents

Description

c. c. mum LOG LOADING noun. APPLICATION FILED PT. 27. I9.

2 SHEETS-MEET l- Patented Dad. 4,1917.

' same. i

' more, by the use of my improved device, I;

and swing b CLAUDE C. MQLEAN, 0F WULFFSGHN BAY, B RITISH COLUMBIA CANADA.

LooJQoAnmo BOOK.

Specification of Letters Patent.

Application filed September 27, 1817. Serial No. 193,529.

To all whom it may concern. 7

Be it known that I, CLAUDE C. MoLEAn, a citizen of the United States of America, residing at Wulffsohn Bay, in the Province of British Columbia, Dominion of Canada, have invented certain new and useful Improvcmcnts in Log-Loading Booms; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the This invention relates to loading appae ratuses, and has particular reference to booms for loading logs upon logging trains.

The object of the invention is to provide an improved dorm oi" log loading boom, which will provide greater safety for the operators and also tothe carswhich are bc- ,ingdoaded Furthermore, 'the improved boom is desi nod to provide more rapid and cfiicient landling of the logs. It is well known in the art that in the useot the booms which are at present employed, the loadingl'hooks frci'pi ently pull out ofthe log around to" the jcopardyof the loaders. omc loading devices are equipped "with tongs, but they are fastened on long lines, they are equally as dangerous as books whenever a log gets beyond control. By the use of the present device, the tongs are fastened to-a crotch line, after the line is passed through acrotch line block, thereby giving av much shorter sweep to the line, in the event that they pull loose from the logs. F urthermore, the strain on the line, in the eventthat the tongs pull out of the logs,' 'runs the tongs up to. the boom, where there is no dangerv of their swinging about to endanger the position of the loading crew, Furtherprovide against the breakage of cars which constitutes a considerable factor in the loading operations as carried out with the loading devices at present in use, since by the use of the latter,the lcadin en ineer frequently loses control of the ong ines from which the logs are, suspended, so that the i l latterfswing against the carsand seriously damage them." p I Another important factor In connection with vthe use of my invention rises from the fact that the log is always positioned-parallel with the car, so that ib-ISIIOt necessary for the engineer towait for the log to swing Dair.

square with the car before lowering it into place, thus avoiding a considerable loss of time. 7

With theaboveobjects in view, and such others relating to the details of construction as may heremafter appear, my invention will now be fully set forth and described,

reference being had to the accompanying drawings.

In, the drawings Figure l. is a perspective View showing the manner of use of my invention,

Fig. 2 is a plan View of the boom, Fig. 8 is an enlarged view of one of boom arms,

Fig. it is an enlarged detail view of the.

boom mounting,

F g. Susan enlarged V ew of a slack takeup carriage, and

Fig. 6 an enlarged view of a counter,- weight carriage.

Referring more particularly to the driiw ings, 1 represents a boom whose pivotal end is incasc-d in side straps 2 provided with the bearing openings 3 extending transversely of the boom.

Patented Dec. 4,191 7l Said bearing openings 3 receive a horizontal pin'4. Whose ends are borneby a boom block 5 which is bifurcated to receivc the end ofthe boom thcrebetween The boom block 5 also provided withavertical bearing opening 6 within which a pin 7 is rocoivcd, the latter being supported above and below the block 5 in the eyes 8 of spell" of pins 9 which are adapted to be driven into a tree, or other vertical spar 10 to provide for the horizontal. swinging of the boom. In order to'p-revent the swaying of the spur tree or other support, l2 and 13 are carried out at suit: e angles from the tree and attached to convenient stnifnps, stakes or other fastcningsr The free end of the boom 1 is provided with four laterally extended boom arms 14' arranged in pairs, one near the extremit I .Of the boom, and the other ap roximate y a quip-lines 11,-

log len 11 to the rear of the rst mentioned p:

cally disposed plate which extends from a ach of the arms 14 comprise a, verti:-

base plate 15 and is braced to the lgttcnby" means of triangular webs 16; Theextremlties of the arms 14 are provided with shackles 17 for the connection or lines or other appurtenances. Between the arms 14,

the boom is provided with'a haulback block 18 through which a. haulback line 20 passed. One end of the haulback line is connected to the guy line 13 by means of a suitable fittin 21. The b-ight is then passed through the 'oek 18 thence throu h the haulback blocks 22 and 23 on the gu his 13 and the spar 10 respectively, am t lend; to the drum 24 of the usual donkey engine. A loading line 25 extending from the second drum 26 extends through a block 27 strapped to. the upper end of the spar tree, thence thrt'iugh a second block 28 suitably positioned upon the guy line 12, and then at a shackle 29 is subdivided into a pair of crotch lines 30, one of which is connected to a forward "arm 14, and the other of which is connected-to a rear arm 14 upon the opposite side. ,At their respective arms 14, the crotch lilies pass throu h blocks 31 and carry at their free ends t e'tongs 32.

Attached to the same arms 14 to which the crotch lines are connected, are the guy lines 38 which connect to a. common shackle 34 stra to the upper enll of the spar tree, a Jii'cent the connection of the guy lines 11, 1 2 and 13. Upon one of the guy lines 33,.a slack take-up carriage 35 is mounted and is connected by means of a line 36 with the shackle 29 of the loading line.

Also connected to the forward end of the boom 1, {is a counterweight line 37, which asses over a block 38 connected to the guy .ine 12 extending beyond the end of .the

boom, and then connects to acounter-weight carria e 39 which rides upon the guy line' 12, an carries a suitable counter-weight 40.

In the" o ration of the boom which has 7 been descri d, the crotch lines 30 are c0nnected the arms 14 diagonally across the boom in hecordanee with the direction which the track 41 lies with respect to the boom and the log pile. Thus, in Fi 2, the middle of the track underlies the orward right hand arm 14 and the rear left hand arm 14 so that a log suspended from these arms would lie parallel with that track and consequently arallel to a car upon which the log is to be oadcd. Obviously, ifthe log pile lay upon the opposite side of the spar 10, so that the boom must be swung down track, instead of in the direction indicated in Fig. 2, the opposite arms 14 would be employed to guide the crotch lines. The rigging which has been described as necessary for the successful operation of the improved boom may be modified to meet the exigencies of the particular locality and conditions where the boom is employed, but in each case must include the crotch lines 30. It will be evident that 10 ging operation carried out with the aid 0 ,my improved structure will progress with greater speed and safety than would be possible by the use of g the ordinary booms now in use.

What I claim as my invention is: 1. A hoisting apparatus, comprising in combination with a spar, a boom pivoted to the spar for vertical and horizontal move ment, means for operating the boom verticnlly,-otf-set members carried b the boom at different distances from its ree extremity, and loading lines operative in unison from the extremities of said off-set elements.

2. A boom for logging operations, comprising in combination with a boom spar, pairs of laterally extended arms carried by the boom at spaced intervals from its free extremity, and interchangeable loading line connections carried by the free ends of the arms.

In testimony whereof, I aifix my signature in the presence of two witnesses CLAUDE C. ltIoLEAN. Witnesses:

D. M. Smrson, H. G. Hymn.

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