US182551A - Improvement in bevels - Google Patents

Improvement in bevels Download PDF

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US182551A
US182551A US182551DA US182551A US 182551 A US182551 A US 182551A US 182551D A US182551D A US 182551DA US 182551 A US182551 A US 182551A
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Prior art keywords
bevels
improvement
rafters
bar
instrument
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25H—WORKSHOP EQUIPMENT, e.g. FOR MARKING-OUT WORK; STORAGE MEANS FOR WORKSHOPS
    • B25H7/00—Marking-out or setting-out work
    • B25H7/04—Devices, e.g. scribers, for marking
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S33/00—Geometrical instruments
    • Y10S33/16—Clips and rafters

Definitions

  • the object of this invention is to furnish an improved instrument for getting the length of rafters and the bevels of their ends, when the Width of the building and the desired pitch of said rafters are known, and which may also be used for getting the length and the bevels of the ends of braces, and for other similar uses.
  • A represents a bar, upon the edge of which is formed a scale of division-marks, numbered to represent the length of the rafter or brace,
  • the bar A is slotted longitudinally to receive the clamping-screws B, which are screwed into straight bars C placed upon the lower side 'of said barA, as shown in Figs. l and 2.
  • the bar A is laid diagonally across the arms of an ordinary square, and is adjusted upon the long arm of' the square at a point representing the half width ofthe building, and upon the short arm at a point representing the desired pitch of the rafters.
  • the bars G are then adjusted against the edges of the arms ofthe square, and are clamped in place by the screws B.
  • the instrument is now set to give the length of the rafters and the bevels of their ends.
  • the instrument may be used without a square, by having lines drawn upon the under side of the bar A, to represent the different positions of the bars C, for different lengths and pitches of rafters.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Description

G. ILBRADSHAW.
BEvELs. l Y No. 182,551. Patented. Sept. 26,1876-,
- www "'"fmzf mamans.
UNITED STATES PATENT OEEIOE.
GEORGE H. BRADSHAW, OF FAYETTEVILLE, TENNESSEE.
IMPROVEMENT |N BEvELs.'
Specification forming part of Letters Patent No. 182,551, dated September 26, 1876; application filed July 31, 1876.
To all whom it may concern:
Be it known that I, GEORGE HAMILTON BRADSHAW, of Fayetteville, in the county of Lincoln and State of Tennessee, have invented a new and useful Improvement in Instrumeut for Getting the Bevels and Length of Batters, Braces, 6to., of which the following is a specication Figure l is a plan View of my improved instrument, illustrating itsV use. Fig. 2 is a side view of the same.
Similar letters of reference indicate corresponding parts.
The object of this invention is to furnish an improved instrument for getting the length of rafters and the bevels of their ends, when the Width of the building and the desired pitch of said rafters are known, and which may also be used for getting the length and the bevels of the ends of braces, and for other similar uses.
The invention will first be described in connection with drawing, and then pointed out in the claim.
A represents a bar, upon the edge of which is formed a scale of division-marks, numbered to represent the length of the rafter or brace,
and which should be made upon a scale of anl inch to the foot to make it correspond with the division-marks of an ordinary square. The bar A is slotted longitudinally to receive the clamping-screws B, which are screwed into straight bars C placed upon the lower side 'of said barA, as shown in Figs. l and 2. In using the instrument the bar A is laid diagonally across the arms of an ordinary square, and is adjusted upon the long arm of' the square at a point representing the half width ofthe building, and upon the short arm at a point representing the desired pitch of the rafters. The bars G are then adjusted against the edges of the arms ofthe square, and are clamped in place by the screws B. The instrument is now set to give the length of the rafters and the bevels of their ends. The instrument may be used without a square, by having lines drawn upon the under side of the bar A, to represent the different positions of the bars C, for different lengths and pitches of rafters.
Having thus described my invention, I claim as new and desire to secure by Letters Patent- A carpenters instrument for getting the -bevel and measurement of braces and rafters,
consisting of an angled scale-bar, longitudinally slotted-bar A, screws B B, and the corresponding bars O O, as shown and described.
GEORGE HAMILTON BRADSHAW. Witnesses:
G. S. WILSON, Trios. 1. CARTER.
US182551D Improvement in bevels Expired - Lifetime US182551A (en)

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