US833972A

US833972A - Sawmill-setting apparatus.

Info

Publication number: US833972A
Authority: US
Inventors: Edwin H Percy Jr
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-08-24
Filing date: 1905-08-24
Publication date: 1906-10-23
Anticipated expiration: 1923-10-23

Description

No. 833,972.v PAT'BNTED 0013.23, 1906.

E. H. PERGY, JB. SAWMILL SETTINGv APPARATUS.

` APPLIOATION FILED AUG.24, 1905. (Y I 3 SHEETS-SHEET 2.

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UNITED. sTATEs PATENT oEEIcE.

EDWIN H. PERCY, JR., OF FORT BRAGG, CALIFORNIA.

SAWNIILL-SETTING APPARATUS.

n No. 833,972.

Specification of Letters Patent.

Patented Oct. 23, 1906.

. To4 all whom it may concern,.-

-Be it known that I, EDWIN I-I. PERCY, Jr., a citizen of the United States of America, residin at Fort Bragg, county of Mendocino, and tate of California, have invented certain new and useful Improvements in Sawmill-Setting Apparatus; and I hereby declare .the following to be a full, clear, and, l exact` description of the same, reference being had to the accompanying drawings, forming a part of this specification.

' This invention relates to timber-sawmills and the carriages on which the lo s or timber isy traversed, and relates especia ly to what is technically called the settin machinery or apparatus by means of whic the logs are advanced to the saw after each out is made, as hereinafter described in this specification, and illustrated by drawings that form a part thereof. Y

The invention consists in continuouslydriven machinery to operate the settingworks, connected therewith by frictional gearing that moves the ,traversing screws and knees, andconnected therewith a graduated circular gaging and indicating disk having a movable detent or stop to determine the range of the knees and instantly stop the same by a frictional clamp operated by an attendant and arresting definitely the -motion of the frictional driving-gearingthat moves or sets the timber; also', consists in constructive and other features that will be more fully pointed out by the aid of the 35 drawings.

Referring to the drawings, Figure I is a lan view of the carriage for a sawmill with Its connected parts constructed according to my invention. Fig. II is an edge or side view of the device shown in Fig. I. Fig.r III is an end view of the same with a log mounted thereon. Fig. IV is an enlarged side view of a part of the setting mechanism. Fig. V is a plan view of the part shown in Fig. IV, and Fig. VI a side view of the same at a right angle to the view of Fig. IV.; A In setting machinery for sawmill-carriages to advance the timber to the saw various and varying distances are required as the work progresses, and when such setting machinery Is driven by power its control demands special devices to secure celerity and accuracy. When engagement is made by frictional devices, these have to perform a vmotion of definite range within amoments time, and as frictional gearing is not capable of producing a positive movement stop and indicating devices are required that must have visible and instant action without slipping the frictional transmitting gearing to a de gree that will wear or injure the surfaces in contact. The range of setting or the thickness of pieces to be sawed at each out can be determined by positive stops for the next cut while one is being made; but such adjustment must be positive, instantaneous, and in practice not exceeding a seconds time. To meet these requirements, I construct machinery and devices as shownin the drawings, 1 being the main carriage-rails held together by bolts and struts 21; 2, cross members of the same projecting laterally to sustain the members 3, on which is mounted the driving and setting machinery, as seen in Fig. I.

'The setting machinery consists of the timber-supports 4, knees 5, screws 7, the two shafts 8 yand 9,

pulleys

10 and 12, frictional gear-wheels 13, 14,`and 15, spur-

wheels

17 and 18, bevel-wheels 19 and 20, all as shown in Fig. I. This setting machinery is driven by an endless band 22, that passes partly around thepulleys l0 and 12, vas shown in Fig. II, and permits free movement of the' carriage forward or back on the truck-wheels 23 without other resistance than the tractive strain of the band 22, which at the end passes around a driving-pulley in the usual manner of, such earing. The shaft y8 is driven right and left y the bevel friction-wheels 13 14 15 and is engaged by an end movement of this shaft produced by the short shaft 24, having a bearing at 25, a screw-nut 27 thereon, the latter connected by a shackle device 28 to the end of the shaft 8, as shown in Fig. I. The shaft 24 is operated by a lever 29, a lever 30, link 32, lever 33, andl shaft 34, on which is the operating-lever 29, within reach of an attendant whose station is at A, Fig. I.

Referrin especially to Figs. IV, V, and VI, which i lustrate the indicating and controlling devices for setting the

timber

35, 37 is a short vertical shaft connected to the shaft 9 by the bevel-wheels 38. This shaft 37 has a bearing 40 on the lower frame 42 and at the top turns loosely in the nave or hub 43 IOO IIO

sition shown in Figs. V and VI. When the sawed from the timber 35.

lever 50 is raised, the cam 49 loosens the pin 48 and permits the disk 44 to revolve freely, a rod 52 and spring 53 being provided to prevent this lever from being accidentally raised, also to return the parts to their locked position as soon as it is released by an attendant. In the face of this disk 44 are drilled a row of space-holes 54, the distance between these representing a unit of movement for the arm 39, which is regularly attached to the top of shaft 37 and permits definite movement of the shafts 9, screws 7, the knees 5, and the timber 35, preferably one-fourth of an inch of the latter for each hole and space 54 when the screws 7 have a pitch of four inches for each revolution.

ln the face of the disk 44 are two pins 55 and 57, which limit the rotary range of the arm 39 and the shaft 37, the first being fixed and called the starting pin or point and the second one, 57, the setting or gaging pin to determine the range of the setting movement. An attendant or sawyer stationed at A, Fig. l, can control the three elements for ad justment-the friction-clutch motion for the

shafts

8 and 9, the lever 50 to disengage the disk 44, and the adjustment of this disk.

The operation is as follows: Supposing the log or timber 35 is to be advanced a sufficient distance to cut a board one inch thick and the arm 39 is bearing against the fixed pin 55, as seen in Fig. V, the operator first moves the setting-pin 57 five holes or four spaces ahead to the position shown in the same figure. The lever 29 is then pressed forward, engaging the friction-wheels 14 and 15, starting the

shafts

8 and 9, the screws 7 and the shaft 37 turning the arm 39 until it strikes against the pin 57, which arrests the motion of all the parts, the lever 29 being at the same time or a little in advance drawn back to release the frictionwheels 14 and 15. The clutch-wheels 13, 14, and 15 have smooth faces and being driven by frictional contact only the movement to engage and disengage them is short and quick to avoid sliding the contacting faces. This advances the timber 35 one inch, also the thickness of a saw-kerf, which must be provided for in each case. This latter is accomplished automatically at each setting by the relation between the pins 55 and 57, which are so placed that a space (shown at 58 in Fig. V) represents the saw-kerf and is added to the movement of the arm 39. When the arm 39 strikes the pin 57 and is stopped, the attendant raises the lever 50, releasing the disk 44, which is turned until the fixed pin 55 again comes in contact with the arm 39, so that after each cut the gaging of thickness is done by simply turning the disk 44 after each cut until the pin or stop 55 contacts the arm 39, not requiringI skill or even observation so long as pieces of the same thickness are being The position of the disk 44 and of the arm 39 being visible to a head sawyer, who stands at some distance therefrom, he can from the relative positions of these parts see how to best dispose of so much of a balk or log as remains to be sawed. At the beginning the setting parts are so adjusted that the arm 39 will stand transverse to the log and line of the saw when the knees 5 are at an even number of inches from the line of the saw or cutting face, so that the sawyer can determine from the revolutions of the arm 39 and its relation of position to the disk the amount of the balk or log sawed off and howbest to dispose of the remainder. In this manner the whole control becomes simple and in a sense automatic, the attendant merely operating the

levers

29 and 50, setting the pin 57, and turning the disk 44. To reverse the motion of the machinery and draw the head-blocks 5 back after a log is finished and to place another on the carriage, the lever 50 is raised to loosen the disk 44 and permit it to revolve with the arm 39, the lever 29 is drawn back, engaging the friction-wheels 13 and 15, as will be understood.

Having thus explained the nature and objects of myinvention, what l claim to be new, and desire to secure by Letters Patent, is-

1. In sawmill-setting apparatus, a movable carriage carrying transverse timbersupports, traversing knees on said supports, parallel transverse screws connected with said knees for shifting the timber laterally, main shaft and gears for simultaneously operating said screws, frictional gearing for alternately operating said main shaft and screws in opposite directions, means for alternately throwing said frictional gears into and out of operation, a vertical shaft geared to said main shaft, a stop-arm on said shaft, a disk over which said stop-arm may move, said disk having a home stop against which the back of the stop-arm rests before adjustment for a cut, and a stop adjustable to different distances from said home stop to limit the forward movement of said stop-arm, said disk being revolubleforward to bring the home stop again against the backof the stop-arm and to correspondingly advance the adjustable stop when another advance of the knees is desired, and means for securing the disk against movement so that the adjustable stop may act in its advanced position to gage the movement of the stop-arm, substantially as specified.

2. In sawmill-setting apparatus, a movable carriage carrying transverse timbersupports, traversing knees on said supports, parallel transverse screws connected with said knees for shifting the timber laterally, a main shaft and gears for simultaneously operating said screws, frictional gearing for alternately operating said main shaft and screws in opposite directions, means for al- IOO IIO

- transverse screws connected with sai ternately throwing said frictional gears into and out of operation, a vertical shaft geared to said main shaft, a stop-arm on said shaft, a disk over which said stop-arm may move, said disk having a home stop against which the back of the stop-arm rests before adjustment for a cut, and a stop adjustable to different distances from said home stop to limit the forward movement of said stop-arm, said disk being revoluble forward to bring the home stop again against the back of the stoparm and to correspondingly advance the ad- 'ustable stop when another advance of the ees is desired, and means for securing the disk against movement so that the adjustable stop may act in its advanced position to gage the movement of the stop-arm, said stops comprising pins adapted to be inserted in holes in the disk, substantially as specified.

3. In sawmill-setting apparatus, a movable carriage carrying transverse timber-supports, traversing knees on said supports, arallel knees for shifting the timber laterally, main shaft and gears forl simultaneously operating said screws, frictional earing for alternately operating said main s aft and screws in opposite directions, means for alternately throwing said frictional gears into and out of operation, a vertical shaft @eared to said main shaft, stoparm on said shaft, a disk over which said stop-arm may move, said disk having a home stop against which the back of the stop-arm rests before adjustment for a cut, and a stop adjustable to different distances from said home stop to limit the forward movement of said stop-arm, said disk being revolublel forward to bring the home stop again against the back of the stop-arm and to correspondingly advance the adjustable stop when another advance of the knees is desired, and means for securing the disk against movement so that the adjustable stop may act in its advanced position to gage the movement of the stop-arm, said stops comprising pins adapted to be inserted in holes in the disk,

.transverse screws connected with sai one in a fixed position, for stopping the disk when adjusted, and one movable and insertspecified.

4. In sawmill-setting apparatus, ay movable carriage carrying transverse timber-supports traversing knees on said supports, arallel knees for shifting the timber laterally, main shaft and gears for simultaneously operatin said screws, frictional gearing for alternate y operating said main shaft and screws in opposite directions, means for alternately throwing said frictional ears into and out of operation, a vertica shaft geared tosaid main shaft, a stop-arm on said shaft, a disk over which said stop-arm may move, said disk having a home stop against which the back of the stop-arm rests before adjustment for a cut, and a stop adjustable to different distances from said home stop to limit the forward movement of said stop-arm, said disk being revoluble forward to bring the home stop again against the back of the stop-arm and to correspondingly advance the adjustable stop when another advance of the knees is desired, means for clamping the disk against movement so that the adjustable stop may act in its advanced position to gage the movement of the stop-arm, and levers for respectively controlling said clampin means and saidvfrictional gearing, locate within easy reach of an operator stationedto observe the relative positions of said disk and said stop-arm, substantially as specified.

In testimony whereof I have signedmy name to this specification in the presence of two subscribing witnesses.

EDWIN II. PERCY, JR. v Witnesses:

C. E. KING, ABBE P. SCOTT.