US1380735A - Mast-trimming mechanism - Google Patents

Description

W. H. PALMER AND G. E. DAVIES.

MAST IRIMMING MECHANISM.

APPLICATION FILED FEB. 26, I920.

1,880,735. Patented June 7, 1921.

INVENTORS 6.6 Davies AT TORNE) umro erase earur clerics,

WILLIAM HENRY PALMER AND GEORGE EDWARD DAVIES, OF MONTREAL, QUEBEC,

CANADA.

MAST-TRIMMING IVIECI'IANISM.

T 0 all whom it may concern Be it known that we, WILLIAM HENRY PALMER and Gnonon EDWARD DAVIES, subjects of the King of Great Britain, and residing at 2192 Vvaverley street and 386 Ville Marie street, respectively, both of the city and District of Montreal, in the Province of Quebec, in the Dominion of Canada, have invented a new and useful Mast-Trimming Mechanism, of which the following is the specification.

The invention relates to a mast trimming mechanism, as described in the present specification and illustrated in the accompanying drawings that form part of the same.

The invention consists essentially in the novel means employed for guiding the timber in cutting operations.

The objects of the invention are to facilitate the shaping of masts for ships, flag poles, booms, derricks and various purposes; to avoid waste incident to the cutting away of the corners from timber; to rigidly hold the timber during cutting operations and coincidently guide it iin its progress for shaping purposes; and generally to provide a simple and efficient mechanism for holding and guiding the log or timber.

In the drawings, Figure 1 is a perspective view of a sawmill carriage and saw, showing the adjustable means employed for mounting the timber on the carriage.

Fig. 2 is an enlarged perspective detail of the guide and hold member.

Fig. 3 is a longitudinal sectional view of the adjustable holding pin.

Fig. 4: is a perspective detail of a finished mast.

Like numerals of reference indicate corresponding parts in each figure.

Referring to the drawings, the carriage 1 is of any suitable type customarily used in feeding logs or timbers in a sawmill to be cut, and runs on the track 2.. r

The bases 3 of the holding and guiding members are mounted transversely on the deck of the carriage 1, and these bases are preferably formed -with a deeper central portion 4, in which the sliding member 5 is dovetailed.

The holding pin 6 is screw-threaded into the slide 5 near to one end and preferably leans inwardly slightly. This pin is formed with the hexagon body 7, which tapersin the crown 8 to a comparatively sharp point Patented June 7, 1521.

Application filed February 26, 1920. Serial No. 361,557.

9, and as this pin is preferably made of hardened metal, it will engage the log or timber and securely hold it.

The pin 10 is formed with the hexagon body '11, from which extends upwardly the neck 12, terminating in the tapered crown l3 and comparatively sharp point 14. The pin extends downwardly from the body 11 to the flange 15 and forms a threaded socket from the lower end.

The screw 17 fits into the socket 16 and also into an inclined screw hole 18 intermediate of the length of the slide 5, so that the said pin 10 leans in the direction of the pin 6, consequently inmounting a log or timber on the slide 5, these pins at their pointed ends stick into the timber and securely hold it while the saw 19 takes off the strip from the log or timber in shaping it.

In the operation of this invention, the drawing shows a square timber mounted on the slides 5, the pins 6 sticking into one side of the timber and the pins; 10 into the other side. Both pins may be turned to get a better grip of the timber,but the pins 10 permit of more adjustment in this respect, but in screwing these pins 10 into the timber, naturally the weight of the timber forces it tighter to the pins 6 and insures a better grip there also.

The carriage is then operated up, to and beyond the saw, and the saw passes through the timber longitudinally and takes off the projecting corner. the slides 5 may be adjusted by means of the handles 20, or simply by a hand bar or sledge, and moved so as to draw the timber to and from the saw, therefore a mast can be shaped as the carriage progresses.

In shaping the timber it is of course turned around and sawed from end to end continuously until all the corners are off, and it is then almost finished, only requiring treatment by a plane to complete a perfect mast or boom.

It will thus be seen that a very quick method is employed for shaping masts, which does away with all the chipping and at the same time leaves valuable pieces of lumber as a result of the operations, for the corners and cuttings may be used for studdings, templets and various purposes, thereby saving considerable money as well as efficiently carrying out the work in a short time, in fact as much as can be done in an During this operation,

'herein shown adequately completes hour by this method, as it would take days to do by old methods, and the mechanism the method of trimming masts by saws.

The pins and slides as described may be varied to some extent Without departing from the spirit of the invention, and so long as the changes are Within the scope of the claims for novelty following, the protection accorded shall not be invalidated.

W hat We claim is 1. In timber trimming mechanism, atransverse slide mounted on the carriage of a log cutter, the slide having spiked projections set apart for the log or timber to settle on and be held as on the prongs of a fork dur-' ing sawing operations.

In timber trimmlng mechanism, ashiftable member a pin mounted on the shittable member toward one end and a pin mounted intermediately and With the first named pin pointing upwardly 1n a direction adapted to fork the timber from the under side or sides during each operation. a

in timber trimming mechanism, a transverse slide mounted on the carriageof a log cutter, the slide having spiked projections set apart for the log or timber to settle on and be held as on the prongs of a fork during sawing operations, one 01"- said spiked projections being adjustable.

l. In timber trimming mechanism, atransverse slide mounted on the carriage of a log cutter, the slide having spiked projections set apart for the log or timber to settle on and be held as on the prongs of a fork dursawing operations, said spiked projections leaning toward one another and adjustable in placing the log.

Signed at the city of Montreal, in the Province of Quebec, in the Dominion of Canada, this 21st day oi February, 1920.

WILLIAM HENRY PALMER. GEORGE EDl/VARD DAVIES.

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