US830289A - Tooth-bar. - Google Patents

Tooth-bar. Download PDF

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Publication number
US830289A
US830289A US1905282673A US830289A US 830289 A US830289 A US 830289A US 1905282673 A US1905282673 A US 1905282673A US 830289 A US830289 A US 830289A
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United States
Prior art keywords
bar
tooth
teeth
openings
curved
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Thorvald O Berg
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Individual
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Individual
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Priority to US1905282673 priority Critical patent/US830289A/en
Application granted granted Critical
Publication of US830289A publication Critical patent/US830289A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B27B31/00—Arrangements for conveying, loading, turning, adjusting, or discharging the log or timber, specially designed for saw mills or sawing machines
    • B27B31/04—Turning equipment
    • 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
    • Y10T83/65—With means to cause or permit angular re-orientation of work about axis parallel to plane of cut
    • Y10T83/6504—By member having work-engaging tooth
    • Y10T83/6505—Including plural work-engaging teeth
    • Y10T83/6507—Fluid operated

Definitions

  • This invention relates to improvements in tooth-bars used in sawmills for shifting and turning logs, the object being to provide a tooth-bar formed in a single casting, thus iving it greater strength and rigidity than is found in bars made in several pieces riveted together, as such a bar is weakened on account of the great number of rivet-holes.
  • Another object is to provide the teeth with a guard to prevent line bark or the like from falling upon the pivots, thus preventing undue wear of the pivots.
  • Still another object is to provide a novel form of rivet for the teeth.
  • Figure 1 is'a side elevation of a tooth-bar embodying my invention.
  • Fig. 2 is a longitudinal section thereof, on the line as w of Fig. 3.
  • Fig. 3 is a front elevation, partly in section; and
  • Fig. 4 is a section on the line g y of Fig. 2.
  • 1 designates the body of the bar, which is formed in a single casting of suitable metal-such, for instance, as steel.
  • the lower portion is tubular, as clearly indicated, and the upper portion is provided with openings 2, which extend from the front to the rear, and mounted to swing in these openings are teeth 3, said teeth being curved upward in the usual manner.
  • the lower end of the bar 1 has divergent basearms 4, which connect with operating pistonrods 5, extended from pistons in cylinders 6. These arms 4, it will be noted, are connected by a base-bar 7, which gives strength to the lower portion of the device.
  • the pivots for the teeth 3 have enlarged threaded portions 8 for engaging in tapped holes in walls of the openings 2, and the pins have reduced portions 9, which pass through erforations in the teeth and engage in perforations in the opposite wall.
  • the pivotpins are inserted alternately from opposite sides, and therefore by alternately roviding small perforations in opposite wal s the bar is not materially meakened.
  • each tooth When in lowered position, the teeth rest upon brid e-plates 10, and at the heel portion of each tooth is a curved guard-finger or plate 11, designed to engage over and pass over the upper portion of a curved cross-bar 12.
  • a curved guard-finger or plate designed to engage over and pass over the upper portion of a curved cross-bar 12.
  • the upper end of the bar has a head 13 formed integral with it, and this head is practically wedge-shaped, extending to a point 14, and below this point the front and rear sides are curved outward.
  • the upper end may readily pass between logs when the tooth-bar is moved up or down.
  • a tooth-bar comprising a body portion having openings, teeth mounted to swing in the openings, bridge-pieces upon which the teeth may rest, and guards at the heel portions of the teeth to prevent material from reaching the pivot-pins of the teeth.
  • a tooth-bar having openings, teeth mounted to swing in the openings, the said teeth having rearwardly curved guard-plates at the heel portions, upwardly and forwardly curved cross-bars in the openings and over which said guards may swing, and bridges for supporting the teeth when in lowered position. 4

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Portable Nailing Machines And Staplers (AREA)

Description

PATENTED SEPT. 4, 1906.
T. O. BERG.
TOOTH BAR.
APPLICATION FILED 0011s. 1905.
W m 8 F N W3 M T .W M A. Wm m VI r B a H.
WITNESSES:
UNITED STATES PATENT OFFICE.
THORVALD O. BERG, OF LITTLE FALLS, MINNESOTA.
TOOTH-BAR.
To all whom it may concern.-
Be it known that I, THORVALD O. BERG, a citizen of the United States, and a resident of Little Falls, in the county of Morrison and State of Minnesota, have invented a new and Improved Tooth-Bar, of which the following is a full, clear, and exact description.
This invention relates to improvements in tooth-bars used in sawmills for shifting and turning logs, the object being to provide a tooth-bar formed in a single casting, thus iving it greater strength and rigidity than is found in bars made in several pieces riveted together, as such a bar is weakened on account of the great number of rivet-holes.
Another object is to provide the teeth with a guard to prevent line bark or the like from falling upon the pivots, thus preventing undue wear of the pivots.
Still another object is to provide a novel form of rivet for the teeth.
I will describe a tooth-bar embodying my invention, and then point out the novel features in the appended claims.
Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.
Figure 1 is'a side elevation of a tooth-bar embodying my invention. Fig. 2 is a longitudinal section thereof, on the line as w of Fig. 3. Fig. 3 is a front elevation, partly in section; and Fig. 4 is a section on the line g y of Fig. 2.
Referring to the drawings, 1 designates the body of the bar, which is formed in a single casting of suitable metal-such, for instance, as steel. The lower portion is tubular, as clearly indicated, and the upper portion is provided with openings 2, which extend from the front to the rear, and mounted to swing in these openings are teeth 3, said teeth being curved upward in the usual manner. The lower end of the bar 1 has divergent basearms 4, which connect with operating pistonrods 5, extended from pistons in cylinders 6. These arms 4, it will be noted, are connected by a base-bar 7, which gives strength to the lower portion of the device.
Specification of Letters Patent. Application fil d October 13,1905. Serial No. 282,673.
Patented Sept. 4, 1906.
The pivots for the teeth 3 have enlarged threaded portions 8 for engaging in tapped holes in walls of the openings 2, and the pins have reduced portions 9, which pass through erforations in the teeth and engage in perforations in the opposite wall. The pivotpins are inserted alternately from opposite sides, and therefore by alternately roviding small perforations in opposite wal s the bar is not materially meakened.
When in lowered position, the teeth rest upon brid e-plates 10, and at the heel portion of each tooth is a curved guard-finger or plate 11, designed to engage over and pass over the upper portion of a curved cross-bar 12. By this arrangement, and as the guards 11 extend entirely across the openings 2, they will prevent fine bark or the like from passing onto the pivot-pins.
The upper end of the bar has a head 13 formed integral with it, and this head is practically wedge-shaped, extending to a point 14, and below this point the front and rear sides are curved outward. By this construction the upper end may readily pass between logs when the tooth-bar is moved up or down.
Having thus described my invention, I claim as new and desire to secure by Letters Patent 1. A tooth-bar comprising a body portion having openings, teeth mounted to swing in the openings, bridge-pieces upon which the teeth may rest, and guards at the heel portions of the teeth to prevent material from reaching the pivot-pins of the teeth.
2. A tooth-bar having openings, teeth mounted to swing in the openings, the said teeth having rearwardly curved guard-plates at the heel portions, upwardly and forwardly curved cross-bars in the openings and over which said guards may swing, and bridges for supporting the teeth when in lowered position. 4
In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.
THORVALD O. BERG. Witnesses:
N. M. BERGnErM, HALL.
US1905282673 1905-10-13 1905-10-13 Tooth-bar. Expired - Lifetime US830289A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US1905282673 US830289A (en) 1905-10-13 1905-10-13 Tooth-bar.

Applications Claiming Priority (1)

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US1905282673 US830289A (en) 1905-10-13 1905-10-13 Tooth-bar.

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655186A (en) * 1951-04-12 1953-10-13 Dow C Richardson Power-operated log turner with fulcrum stop

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2655186A (en) * 1951-04-12 1953-10-13 Dow C Richardson Power-operated log turner with fulcrum stop

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