US2681670A - Log barking apparatus - Google Patents

Description

June 22, 1954 Q E -H E 2,681,670

LOG BARKING APPARATUS Filed May 21, 1951 4 Sheets-Sheet l INVENTOR. Charles E. Pren hoe AH'y.

June 22, 1954 c. E. PRENTICE 2,681,670

LOG BARKING APPARATUS Filed May 21, 1951 4 Sheets-Sheet 2 INVEN TOR.

C12 arls E. Pren 7'1'ce June 1954 c. E. PRENTICE LOG BARKING APPARATUS 4 Sheets-Sheet 3 Filed May 21, 1951 INVENTOR. Charles E .Pren Hoe $24 021 June 1954 c. E. PRENTICE LOG BARKING APPARATUS 4 Sheets-Sheet 4 Filed May 21 1951 INVENTOR. Charles E. Pren zlce Patented June 22, 1954 UNITED STATES PATENT OFFICE- Charles E. Prentice, Portland, Oreg. Application May 21, 1951, Serial No. 227,297

This invention relates to improvements in log barking apparatus of the type shown and described in United States Patent No. 2,259,584 dated October 21, 1941. As therein pointed out the invention relates particularly to log barking machines of the type described wherein a power driven rotary tool is employed to remove the bark from successive areas presented by rotation of the log in combination with longitudinal movement thereof in progressive process.

It is one of the principal objects of the present invention to provide apparatus of this character which is of simple, efiicient, durable, compact construction and accurately adjustable to logs of all diameters and also wherein the cutting tool is adjustable in lateral inclination in conformity with the taper of a log in the direction of its length.

The foregoing and other objects will appear as my invention is more fully hereinafter described in the following specification,illustrated in the accompanying drawing and finally pointed out in the appended claim.

In the drawings:

Figure 1 is a side elevation of the invention shown operatively engaged with a rotatable log.

This view is partly in section and is taken approximately along the line l-l of Figure 2.

Figure 2 is a fragmentary top plan view of Figure 1 taken approximately along the line 2-2 of Figure 1.

Figure 3 is a sectional end elevation taken approximately along the line 3-3 of Figure 1.

ures 1, 2 and 3 reference numeral I indicates generally a base made up of spaced-apart parallel members in the form of angle irons 2 and 3 or channelsections if so desired. These base members aresecured in spaced-relation to each other and mounted upon a support indicated at 4 which may be either in the form of a float anchored in a mill pond or a platform extending out into the pond and against the outside surface of which a log 5 may be drawn, the log being rotated with respect to the platform by any approved means, such, for example, as the chains shown and described in the above identified 1 Claim. (Cl. 144-208) United States patent, or by the mechanical means forming part of this present invention as hereinafter pointed out. The front of the support is formed with an inwardly extending recess having vertical side walls 4A and a back wall 4B to permit the apparatus to operate below as well as above the top surface of the float.

The approximate water level in relation to the support 4 and the log 5 is indicated at 6. A movable cross member 6A is arranged transversely between the base members 2 and 3 and secured as at l to the cross-member is a pair of aligned bearings 8 through which is rotatably mounted a shaft 9. Secured as at It] to the shaft 9 and rockable therewith is a platform II and tothis platform is secured a pair of aligned bearings I2 and 13 arranged at right-angles to the shaft 9. Within the bearings l2 and 13 is rotatably mounted a shaft M to which is secured one end of a swingable carriage generally indicated at l5 by means of spaced-apart end plates l6 and I1 secured as at "A to the shaft. The carriage is made up of spaced apart I beams whose inner ends are welded to the plate It. It is to be noted (see Fig. 1) that the plates l6 and I I are spaced apart from the platform H and free to move with respect thereto. By this arrangement the carriage 15 may be swung upwardly and downwardly in a vertical plane about the shaft 9 and tilted transversely to either side about the shaft 14.

Secured as at [8 across the end plates l5 and ll of the carriage 15 by means of a base ISA and movable therewith in both directions as aforesaid is an electric motor l9 provided with a driving pulley embraced by a belt or belts 2| also embracing a driven pulley 22 secured to a shaft 23 rotatably mounted by means of bearings 23A to the opposite or outer end of the carriage l5. Secured to the shaft 23 and rotatable therewith is any approved type of rotary cutterhead 23B covered by a hood 24 and adapted for cutting engagement with the bark of logs of any diameter by reason of the swingable adjustment of the carriage in a vertical plane as aforesaid.

For minutely adjusting the cutterhead with respect to the periphery of the log for regulating the depth of cut of the cutterhead I pivotally attach as at 25 to the underside of both beams of the carriage 15, the inner ends of a pair of shoes 26 and 21 whose opposite or outer ends are pivotally connected as at 28 to alternately operable piston rods 29 mounted by means of their pistons within operating cylinders 30 and 3| each of which is in open communication with 45 and 46 at each of their ends.

pressure and exhaust lines 32 and 32 controllable by any approved type of operating mechanism, not shown.

The rocking of the carriage to either side is accomplished by a double-acting pressure cylinder 33 (see Fig. 3) having a piston therein connected by means of its piston rod 34 as at 35 to the platform I l' upon which the bearings i2--i3 and shaft M are mounted. The top end of the cylinderis connected as at 35A to the motor base 18A secured across the end plates l6 and ll of the carriage.

The swinging of the frame upwardly and down wardly in a vertical plane as aforesaid is accomplished by a cylinder 36 in open communication with alternate pressure and exhaust lines 31-38 and provided on its'interior with a piston connected by means of its rod 39 to an arm 49 extending rearwardly from the end of the plat- Mounted to the inner ends-of the base mem here :2 and 3 by welding, bolting, or the like, are

two angularly disposed frames generally indicated at 22 each made up of a pair of vertically spaced- apart angle irons 43 and 4 5 secured in spaced relation to each other by hearing blocks Rotatably mounted within each pair of bearing blocks in each frame is a screw shaft 4?, each of which is provided at one of its ends with a driven sprocket wheel 48 embraced by a sprocket chain ,49 embracing and driven by a driving sprocket -50 connected by means of a. shaft 5i through .anyapproved type of gear reduction or power transmission means 52 operatively engaged with and'drivenby a motor 53, The motor and transmission are mounted upon any approvedtype of support fid secured to the outer endof the frames 42 and extending upwardly therefrom.

Secured to each end of the crossmember 6A 1' is. an upright member 55 and the upper end of each upright member is provided with a squared projection 56 bored and internally threaded for operative engagement with the screw shafts 41 for movement therealong in either direction in .the manner of a traveler nut, when the shafts are rotated. By this arrangement and uponoperation of the motor 53 the carriage and itsrelated parts may be advanced forwardlyand upwardly with respect to the base i to accommo- 58 of the frame is provided with shoes 59 slidable along parallel tracks 69v by means of a worm or screw shaft Bl driven by a motor and power transmission means as at 62 and extending through a threaded block 63 secured to the bottom .of the base 58. In this form of the invention the log 5A instead of floating in water adjacent a float is rotatably mounted upon and supported by aligned pairs of worm gears 64 secured to shafts 65 rotatably mounted in the upper ends of standards 65 Whose bases 61 are slidably mounted on parallel tracks 68. The standards and their worm gears 64 in each pair are adjustable toward and away from each other along their respective track by means of an adjusting screw shaft 69 provided with a worm gear "i0 driven by a screw shaft H which in turn is driven by any approved motor and power transmission means generally indicated at 12. One

' shaft 13 of the power transmission means is enaged-with a worm gear 14 secured to a shaft 15 which is provided with worms 16 and 11 operatively engaged with the worm gears 64 and adapted to actuate the same for rolling the log while at the same time the barking apparatus is being moved along the tracks 69.

In the further modification illustrated in Figure 5 the carriage-and its related partsand'opcrating mechanisms are the same as those shown and described in the other forms of the inven-- tion but the cross member is mounted upon a base 18 movable along tracks 19 by means of a traveler block 86 secured to the underside .of the base and engaged with a worm 8i driven by motor and power transmission means generally indicated at 82. in connection with this form of the invention is rotatably mounted between a pair of standards 83 in Whose upper ends are journaled inwardly extending shafts Bd pointed on their inner ends and driven into the end of the log so that the log may rotate in the same manner as a work piece supported between lathe centers.

While I have shown a particular form of embodiment of my invention, I am aware that many minor changes, therein will readily suggest themselves to others skilled in the art without departing from the spirit and scope of the invenly attached at one of its ends to a second base for swinging movement in a vertical plane and in lateral inclination with respect to said second base, a cutting tool rotatabiy mounted at the opposite end of said carriage and operatively connected with'a motor carried by said second base, said second base being slideably mounted within said tracks for movement in the direction of the length of said tracks for presenting said cut-- ting tool to logs of various diameters. Y

References Cited in the file of this patent UNITED STATES PATENTS Number Name Date v 1,294,275 Johnson et a1. Feb. 11, 1919 1,358,993 Shaw Nov. 16, 1920 1,673,255 Pangborn June 12, 1928 2,259,584 Prentice Oct; 2111941 2,576,967 Pauley Dec. 4, 1951 The log 53 being dealt with I i I

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