US281762A - Albeet f - Google Patents

Albeet f Download PDF

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Publication number
US281762A
US281762A US281762DA US281762A US 281762 A US281762 A US 281762A US 281762D A US281762D A US 281762DA US 281762 A US281762 A US 281762A
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Prior art keywords
nose
block
facing
piece
blocks
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Expired - Lifetime
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27B—SAWS FOR WOOD OR SIMILAR MATERIAL; COMPONENTS OR ACCESSORIES THEREFOR
    • B27B27/00—Guide fences or stops for timber in saw mills or sawing machines; Measuring equipment thereon
    • B27B27/02—Guide fences or stops for timber in saw mills or sawing machines; Measuring equipment thereon arranged laterally and parallel with respect to the plane of the saw blade
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/647—With means to convey work relative to tool station
    • Y10T83/6492—Plural passes of diminishing work piece through tool station
    • Y10T83/6499—Work rectilinearly reciprocated through tool station
    • Y10T83/6508—With means to cause movement of work transversely toward plane of cut
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T83/00—Cutting
    • Y10T83/727—With means to guide moving work

Definitions

  • This invention relates to the construction of sawmill head-blocks; and it consists in providing a steel facing for the nose and face of the block, as hereinafter specified.
  • the log In the operation of sawing, the log, when it is set forward for a new cut by the action of the knees, is slid on the face of the block, and the result is that it wears away the face very rapidly, and so it has been found necessary to face the face of the block with steel.
  • Such facings have been laid from the point of the nose back along the face of the block. Two difficulties have been found to exist in this c0nstructionviz., the end of the facing at the point of the nose is very apt to get caught by an oncoming log, and get bent up, and especially so when the facing becomes worn thin at that point.
  • Figure 1 is a side elevation of a head-block and knee, and shows my improved facing in place.
  • Fig. 2 is afront elevation of the nose of the block, and shows my facing in place.
  • Fig. 3, is a perspective view of the facings detached from the block.
  • A is the block; a, the faceof the block.
  • B is the plain facing-plate; B, the nose facing. piece, and C the knee.
  • the construction will be readily understood from the illustration.
  • the facings are in two parts, the plate B and the nose-piece B. They are held in place 011 tioned.
  • the block by bolts D D, &c., which have their heads countersunk in the holes cl d in the facings.
  • the plates B have the holes (Z so arranged that they can be placed in the same position on the blocks either end foremost, and hence can be reversed when desired.
  • the nose-pieces B are made with a lip or back- .lap, 12, which reaches down under the nose of the block, and is there secured by a screw.
  • the top or face .part of the piece B is secured by a bolt, D, and may also have screws, as shown, nearer the point. The most wear upon the facings is at the point of the nose, and gradually diminishes toward the rear of the block.
  • the nose-pieces wear out first, and when constructed as shown, they can be replaced with new ones, when de sired, and when so replaced the plates B are reversed end for end, and the unworn end of the plate B will correspond in thickness with the end of the new nose-piece.
  • the facing of the nose of the block is very important, in that it prevents the nose becoming mutilated by coming in contact with the logturning apparatus, which is constantly occurring, and often results in breaking and chipping off the end of the nose so much that the block is unable to sustain the last boardin the cant. So far as this latter purpose is concerned the fac ing-piece and nose-piece may all be one piece of metal.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)

Description

(No Model.)
- A. P. GRISWOLD.
meme FOR SAW MILL HEAD BLOCKS. No. 281,762. Patented Ju1y24, 1883.
g [p JrWW UNITED STATES PATENT OFFICE...
ALBERT F. eRrswoLD,-oE ERIE, PENNSYLVANIA.
FACING FOR SAW-MILL HEAD-BLOCKS.
SPECIFICATION forming part of Letters Patent No. 281,762, dated July 24, 1883.
- Application filedJannary 6, 1883. (No model.)
nia, have invented certain new and useful Improvements in Facings for Saw Mill Head Blocks; 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 same.
This invention relates to the construction of sawmill head-blocks; and it consists in providing a steel facing for the nose and face of the block, as hereinafter specified.
In the operation of sawing, the log, when it is set forward for a new cut by the action of the knees, is slid on the face of the block, and the result is that it wears away the face very rapidly, and so it has been found necessary to face the face of the block with steel. Such facings have been laid from the point of the nose back along the face of the block. Two difficulties have been found to exist in this c0nstructionviz., the end of the facing at the point of the nose is very apt to get caught by an oncoming log, and get bent up, and especially so when the facing becomes worn thin at that point. The other defect is that when the facing becomes worn thin at the nose end of the block, as it does to a far greater extent than at points farther, back, entire new facingplates are required, although themear parts of the plates may be very little worn, there being no provision made for reversing the plates. To remedy these defects is the object of the construction here shown.
The invention is illustrated in the accompaing drawings as follows: Figure 1 is a side elevation of a head-block and knee, and shows my improved facing in place. Fig. 2is afront elevation of the nose of the block, and shows my facing in place. Fig. 3, is a perspective view of the facings detached from the block.
A is the block; a, the faceof the block. B is the plain facing-plate; B, the nose facing. piece, and C the knee. The construction will be readily understood from the illustration. The facings are in two parts, the plate B and the nose-piece B. They are held in place 011 tioned.
the block by bolts D D, &c., which have their heads countersunk in the holes cl d in the facings. The plates B have the holes (Z so arranged that they can be placed in the same position on the blocks either end foremost, and hence can be reversed when desired. The nose-pieces B are made with a lip or back- .lap, 12, which reaches down under the nose of the block, and is there secured by a screw. The top or face .part of the piece B is secured by a bolt, D, and may also have screws, as shown, nearer the point. The most wear upon the facings is at the point of the nose, and gradually diminishes toward the rear of the block. Hence it is that the nose-pieces wear out first, and when constructed as shown, they can be replaced with new ones, when de sired, and when so replaced the plates B are reversed end for end, and the unworn end of the plate B will correspond in thickness with the end of the new nose-piece. Aside from the purposes of this construction above named the facing of the nose of the block is very important, in that it prevents the nose becoming mutilated by coming in contact with the logturning apparatus, which is constantly occurring, and often results in breaking and chipping off the end of the nose so much that the block is unable to sustain the last boardin the cant. So far as this latter purpose is concerned the fac ing-piece and nose-piece may all be one piece of metal.
What I claim as new is 1. A facing-plate forsaw-mill head-blocks,
having thereon a lip or back lap, I), which reaches over and below the nose of the block, substantially as and for the purposes men '2. A facing for saw-mill head-blocks, con sisting of the two parts B and B, of which the part B is constructed to be reversed, as described, and the part B is made to reach over and below the nose of the block, as shown and for the purposes mentioned.
In testimony whereof I affix my signature in presence of two witnesses.
ALBERT F. GRISXVOLD.
Witnesses: i
JNo. K. HALLOCK, ROBERT H. PORTER.
US281762D Albeet f Expired - Lifetime US281762A (en)

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