US1173615A

US1173615A - Machine for removing the bark from logs.

Info

Publication number: US1173615A
Application number: US652915A
Authority: US
Inventors: Karl Arthur Staahlnacke
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-02-06
Filing date: 1915-02-06
Publication date: 1916-02-29
Anticipated expiration: 1933-02-28

Description

K. A. STZHLNACKE.

MACHINE FOR REMOVING THE BARK FROM LOGS.

APPLICATION FILED FEB-6.1915.

1,178,61 5. Patented Feb. 29, 1916. o/b

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MACHINE FOR REMOVING THE BARK FROM LOGS.

APPLICATION FILED FEB. s. 1915.

Patented Feb. 29, 1916.

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MACHINE FOR REMOVING THE BARK FROM LOGS.

APPLICATION FILED FEB. 6, 1915.

1,173,61 5. Patented Feb. 29, 1916.

3 SHEETISSHEET 3.

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KARL ARTHUR sTAHLNAcKE, OF osTuRAs, BERGVIK, SWEDEN.

MACHINE FOR REMOVING THE BARK FROM LOGS.

Application filed February 6', 1915.

To all '10]! 0111 it m (13/ concern Be it known that I, KARI. ARTHUR STZHL- NACKE, a subject of the King of Sweden, and resident of lsteras, Bergvik, in the Kingdom of Sweden, have invented certain new and useful Improvements in Machines for Removing the Bark from Logs, of which the following is a specification, reference being had therein to the accompanylng drawings.

This invention relates to a machine for removing the bark from logs and the like.

The invention refers especially to a slmple and practical device for rotating the log and simultaneously feeding it forward, the said device in its most suitable form being so fitted that the feeding forward of the log is changed automatically according as the diameter of the log varles.

The invention refers also to some devices cooperating with the devices stated above and which will be described more particularly hereinafter.

The annexed drawings show the machine in Figure 1 from the side, in Fig. 2 1n cross section and in Fig. 3 in plan view, partly 1n section. Fig. 4 shows a longitudinal section of a drive clutch for the shaft of the barking disk. Figs. 5 and 6 show details belonging to the path of the log. Fig. 7 shows in detail the device keeping the log in movement. Fig. 8 shows a clutch. Fig. 9 shows parts cooperating with said clutch.

In the machine shown in Figs. 1 and 2, a plurality of barking disks 1, '1, are arranged at the same distance from each other along the log. The barking disks are journaled so that their shafts 2 which are horizontal or substantially horizontal form a right or substantially right angle with the log, the bellied side provided with knives 1 being in contact with the log. Moreover the position of height of the disk relatively to the bed for the log is adapted in such a manner that the contact point between the disk and the log will lie higher than the shaft of the disk. Motion is transmitted to the disks 1 by a chain or'other suitable gear. 4 designates their driving pinions and 5 the driving shaft, from which the power is transmitted to the said disks. The shafts of the disks consist of several parts or are provided with a clutch 3, so-

that the same can expand in the longitudinal direction, said shafts being acted upon by the spring 42 through the lever 41, Fig.

Specification of Letters Patent.

Patented Feb. 29, 1916.

Serial No. 6,529.

2, so that the disk 1 is held against the log in a yielding manner.

Fig. 4 shows the said clutch in detail. The shaft 2 can slide in the longitudinal direction in the shell 50 supported by suitable bearings, the driving pinion 4 being secured on said shell. The piston 40, with which the lever 41 is connected can also move in said shell. The lever 41 is acted upon by a spring 42 which is connected with the same by means of a clamp 44 or the like fixed to the lever 41 in an adjustable manner. The other end of the spring 42 is by means of another displaceable clamp 41 secured to the bar 43 being parallel to the shaft-2. Between the

parts

2 and 40 there is located a spring 51. The shell 50 is provided with longitudinal grooves 52, in which rollers 53 run, which are located on the lateral pivots 54 of the shaft 2. The shaft 2 is thereby caused to partake in the rotation of the shell 50 and the shaft can besides move in the longitudinal direction. The axial pressure of the barking disks against the log can be regulated by displacement of the clamps 41 44*.

The path for the log consists of the two rollers 13, 13 (or of more such rollers). The roller 13 is journaled on the one end of a lever 13 located at right angles to the log and ournaled horizontally in suitable bearings 14. A disengageable ratchet device mamtains the levers in a horizontal position for supporting the log. If the ratchet device 1s disengaged the ends of the levers carrying the log will swing downward whereby this latter falls down. The levers then occupy their original position and the next log can be rolled from the table 48 on to the same. The ratchet device, which can be of any suitable form is so arranged that it works automatically. A hook or the like grasps, according to the drawing, over the rear end of the lever, said hook being arranged as a lever and is on the drawing designated by 15. 1.4 designates the hook itself. The lower ends of the two levers 15 are connected through a link 16. Moreover, one of them is by-means of a spring or the like 22 connected to a lever arm 45, arranged as a pendulum, the weight 46 being adjustably secured to the same, the other lever 15 being by means of a spring 21 or the like connected to an arm 20 of a hollow shaft 19 provided with another arm 18 located in the path of the log. When the log moving in the direction against the arm 18, is free from bark the same will abut against the arm .18, thereby disengaging the ratchet device, so that the lovers 15 Will be free and the log fall down. The hooks are then returned to their operative position by the weight 46 and the levers 15 are again brought into engagement with the hooks by the counter-\mights 15 on the rear ends of the levers 13*. The rollers 17 receive the barked log, when this latter is delivered from the rollers 13, and transport the same further.

In order to impart movement to the log there is an arm (3 or the like forming an angle with the log and movable up and down and also to the side longitudinally of the log, said arm being provided with a toothed feed roller 7 or the like, by means of which the same rests against the log. The roller 7 is caused to rotate by means of the

gears

56, 57, 58 to which motion is imparted from the shaft 12 (Fig. 7 The arm 6 is provided with weights 8. A rope 10 passes upward'from the arm 6 and is wound around a disk 11 forming the one part of a friction clutch 1111 on the shaft 12 from which the arm 6 projects. If the said clutch is thrown on, the rope will be wound upon the drum and the arm 6 be raised. The latter is guided by the inclined guide 9. The arm 6 has such a .position, that the feed roller 7 inclines to the log as shown in Figs. 1 and 3, whereby the log will be moved longitudinally and at the same time be rotated, the roller 7 moving along a screw thread line on the same. As on account of the inclination of the guide 9 the angular position-of the arm to the log is varied by the raising or lowering of the arm, determined by the diameter of the log, the pitch of the said screw line will be varied by the said movement. A slender log will thereby get a more rapid longitudinal movement than a thicker..one. The raising and lowering of the arm 6 also takes place automatically. A lever 30 is combined with the friction clutch 1111" and is by means of a spring 31 connected to the arm 24 secured on a shaft 23 extending through the shaft 19. Another arm 25 secured on the shaft 23 is provided with a weight 27 and with a, shoulder 28 acting against lever 30. There is also on'the shaft 23 an arm 29, lying in the path of the arm 18 acted upon by the log, so that the arm 29 will be moved by the arm 18. The frietion clutch is provided with a ratchet wheel 36 (Fig. 9) against which rests a pawl provided on a lever arm 37 supporting a weight 38. The lever arm 37 is by means of a spring 39 connected to a lever 34 on a shaft 32, provided with another lever arm 33 extending into the path of the log in order that it may be acted upon,

when the log is rolled on to the rollers 13. The lever 34 is also brought to turn by the said movement, thereby raising the ratchet of the arm 37 from the ratchet wheel 36. Then, the feed arm 6 falls down against the log along the guide 9 and forces the log against the barking disks 1, the log thereby receiving its above mentioned rotating and" longitudinal movement. When the fore end of the log reaches the lever arm 18 and swings the same this latter takes the lever arm 29 and thereby the lever arms 24:, 25 with it. The lever arms 24, 25 will now be swung toward the right, Fig. 1, so that the shoulder 28 releases the lever 30 and the arm 24 acting through the spring 31 brings the

friction clutch

11, 11*, into operative position, the rope 10 being thus Wound up and the feed arm6 raised. When the log has fallen from the roller 13 the lever30 again occupies its former position by the action of the counter weight 27 and the clutch 1111 is thrown off. The feed arm 6 remains in its raised position on account of the engagement of the lever 37 with the ratchet wheel 36. When the next log arrives onto the roller 13 the same will actuate the lever 33, the clutch part 11 will be free and the feed arm 6 falls down as above mentioned.

Having now described my invention, what I claim as new and desire to secure by Letters Patent is:

1. In a barking machine, the combination of an arm capable of swinging longitudinally of the log, a toothed roller carried by the said arm and forced against the log for rotating and feeding the same, means for rotating the said roller, and means for bringing the said arm into different oblique positions with relation to the log, substantially as described and for the purpose set forth.

2. In a barking machine, the combination of an arm capable of swinging longitudinally and transversely of the log, a toothed roller carried by the said arm and forced against the log for'rotating and feeding the same, means for rotating the said roller, and an oblique guide for the said arm for changing the oblique position of the arm and the roller with relation to the log and thus the feed velocity in accordance with the diameter of the log, substantially as described.

3. In a barking machine, the combination of an arm capable of swinging longitudinally and transversely of the log, a toothed roller carried by the saidarm and forced against the log for rotating and feeding the same, means for rotating the said roller, means for bringing the said arm and the roller into different oblique positions with relation to the log so that the feed velocity is changed in accordance with the diameter of the log, a rope connected with the said arm, a driving shaft, a friction clutch eooperating with the said shaft, one of the members of the said clutch consisting ofa drum around which the-said rope is wound for raising the arm, a catching device keeping the arm in raised position, even if, after the raising of the arm, the said clutch is disengaged, and meansacted upon by the log when brought into the'position to be barked for disengaging the said catching device. g

4. In a barkin machine, the combination of an arm capa le of swinging longitudinally and transversely of the log, a toothed roller carried by the said arm' and forced against the log for rotating and feeding the same, nieans for rotating the said roller, means for bringing the said arm and the roller into different oblique positions with relation to the log so that the feed velocity is changed in accordance with the diameter of the'log, a rope connected with the said arm, a driving shaft, a friction clutch cooperating with the said shaft, one of the members of the said clutch consisting of a drum around which the said rope is wound for raising the arm, means for bringing the clutch into operative position, a lever arm acted upon by a Weight and normally keeping the clutch in disengaged position, and an arm which is located in the path of the log and when acted upon by the same, brings the said lever arm into inoperative position so that the clutch is engaged and the arm carrying the feed roller is raised.

5. In a barking machine, the combination of an arm capable of swinging longitudinally and transversely of the log, a toothed roller earned by the said arm and forced against the log for rotating and feeding the same, means for rotating the said roller,

means for bringing the said arm and the roller into different oblique positions with relation to the log so that the feed velocity is changed in accordance with the diameterof the log, supports for the log capable of swinging, means locking the said supports in operative positlon, means acted upon by the barked log and disengaging the said of an arm capa 1c of swinging longitudinally and transversely of the log, a toothed roller carried by the said arm and forced against the log for rotating and feeding the same, means for rotating the said roller, means for bringing the said arm and the roller into different oblique positions with relation to the log so that the feed velocity is changed in accordance with the diameter of the log, supporting rollers for the log carried by levers, hook-shaped levers engaging the said roller carrying levers, an arm located in the path of the log, means connectin the said arm with the said hookshape levers so that the said arm, when acted upon by the log, disengages the hookshaped levers, and means returnmg the roller carrying levers and the hook shaped levers in their operating positions after the log has left the roller carrying levers.

In Witness whereof, I have hereunto signed my name in presence of two subscribing witnesses.

KARL ARTHUR STAHLNACKE.

Witnesses:

FRANK E. LYON, ELIN WAHMAN.