US732315A - Saw-frame stretcher. - Google Patents

Saw-frame stretcher. Download PDF

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Publication number
US732315A
US732315A US13894103A US1903138941A US732315A US 732315 A US732315 A US 732315A US 13894103 A US13894103 A US 13894103A US 1903138941 A US1903138941 A US 1903138941A US 732315 A US732315 A US 732315A
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United States
Prior art keywords
saw
frame
cam
stretcher
lever
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Expired - Lifetime
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US13894103A
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Charles J Novak
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Individual
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Priority to US13894103A priority Critical patent/US732315A/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
    • B23D51/00—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends
    • B23D51/08—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of devices for mounting straight saw blades or other tools
    • B23D51/12—Sawing machines or sawing devices working with straight blades, characterised only by constructional features of particular parts; Carrying or attaching means for tools, covered by this subclass, which are connected to a carrier at both ends of devices for mounting straight saw blades or other tools for use with tools, dealt with in this subclass, which are connected to a carrier at both ends, e.g. bows adjustable in length or height
    • B23D51/125—Blade tensioning means

Definitions

  • the object of this invention is to provide a bucksaw-frame with a stretcher adapted for the quick and easy straining and releasing of the saw, so that when not in use the saw-frame may be relieved of the tension necessary when it is in use.
  • the saw-frame A does not differ essentially from those in common use, except that near the upper end of the handle-bar A is attached a toothed plate J by screws K. This plate is adapted to engage the teeth I of a cam-lever H, pivoted to one looped end of the stretchertie B.
  • the stretcher-tie is composed of a single piece of wire twisted in the middle portion to the desired tension when strained by the cam-lever.
  • One loop D embraces the upper end of the handle-bar and passes through an eye in the cam-lever. Thence it returns and is twisted in a coil G, which embraces the other end portion back of a few turns of coil F. Thence this part of the wire branches laterally at E, and then turns outwardly in a part which passes into a hole L in the handlebar A. As shown,- the stretcher is in the In this position of the straining position.
  • cam-leverrthe straining-line passes slightly below the point of engagement of the cam with the toothed plate, and the cam is thus held firmly in position, with the end of the handle in contact with the handle-bar. It is instantly released by a pull of the finger.
  • the extension E serves as a spring to prevent the parts from iiying out of proper position and engagement when the cam-lever is released.
  • the device admits of the saw being strainedA or relaxed in a moment. Instead, therefore, of leaving the saw strained when not in use, as is usual when considerable time must be taken to screw up a thumbnut or the like, the operator simply touches the cam-lever when through sawing and the frame is instantly relieved of the strain,which if continuous buckles and twists it quite out of shape.
  • a stretcher comprising a toothed plate adapted for attachment to the saw-frame handle-bar,
  • a stretcher-tie composed of a single piece of wire, looped at each end, one loop passing through an eye in the cam-lever, and having a downwardly and backwardly extending elas tic member entering a hole in the sawframe,

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sawing (AREA)
  • Surgical Instruments (AREA)

Description

PATENTED JUNE 30. 1.903.
Rm. .m1 KBNU ARM VTD OSE NBu .MF Jmm CHIM o Nm su Wawy L. m 0 r M 0. N.
UNITED STATES Patented June 30, 1903.
CHARLES J. NOVAK, F CEDAR RAPIDS, IOWA'. .Y
SAW-FRAM E STRETC HER.
SPECIFICATION forming part of Letters Patent N o. 732,315, dated June 30, 1903.
Application filed January 13, 1903. Serial No. 138,941. (No model.)
To all whom it may concern:
Be it known that I, CHARLES J. NovAK, a citizen of the United States, residing at Cedar Rapids, in the county of Linn and State of Iowa, have invented certain new and useful Improvements in Saw-Frame Stretchers, of which the following is a specification.
The object of this invention is to provide a bucksaw-frame with a stretcher adapted for the quick and easy straining and releasing of the saw, so that when not in use the saw-frame may be relieved of the tension necessary when it is in use. l
The nature of the invention will clearly appear from the description and claim following, reference being had to the accompanying drawing, which is a side view, partly in section, of a saw-frame with my improved stretcher attached.
The saw-frame A does not differ essentially from those in common use, except that near the upper end of the handle-bar A is attached a toothed plate J by screws K. This plate is adapted to engage the teeth I of a cam-lever H, pivoted to one looped end of the stretchertie B. The stretcher-tie is composed of a single piece of wire twisted in the middle portion to the desired tension when strained by the cam-lever. One loop D embraces the upper end of the handle-bar and passes through an eye in the cam-lever. Thence it returns and is twisted in a coil G, which embraces the other end portion back of a few turns of coil F. Thence this part of the wire branches laterally at E, and then turns outwardly in a part which passes into a hole L in the handlebar A. As shown,- the stretcher is in the In this position of the straining position.
cam-leverrthe straining-line passes slightly below the point of engagement of the cam with the toothed plate, and the cam is thus held firmly in position, with the end of the handle in contact with the handle-bar. It is instantly released by a pull of the finger. The extension E serves as a spring to prevent the parts from iiying out of proper position and engagement when the cam-lever is released.
The device, as will be seen, admits of the saw being strainedA or relaxed in a moment. Instead, therefore, of leaving the saw strained when not in use, as is usual when considerable time must be taken to screw up a thumbnut or the like, the operator simply touches the cam-lever when through sawing and the frame is instantly relieved of the strain,which if continuous buckles and twists it quite out of shape.
Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is-
In combination with a bucksaw-'frame, a stretcher, comprising a toothed plate adapted for attachment to the saw-frame handle-bar,
atoothed cam-lever to engage therewith, and
a stretcher-tie composed of a single piece of wire, looped at each end, one loop passing through an eye in the cam-lever, and having a downwardly and backwardly extending elas tic member entering a hole in the sawframe,
substantially as and for the purpose set forth.'
In testimony whereof I afixmy signature in presence of two witnesses.
CHARLES J. NOVAK. Witnesses:
L. A. ST. JOHN, J. M. ST. JOHN.
US13894103A 1903-01-13 1903-01-13 Saw-frame stretcher. Expired - Lifetime US732315A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US13894103A US732315A (en) 1903-01-13 1903-01-13 Saw-frame stretcher.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US13894103A US732315A (en) 1903-01-13 1903-01-13 Saw-frame stretcher.

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US732315A true US732315A (en) 1903-06-30

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US13894103A Expired - Lifetime US732315A (en) 1903-01-13 1903-01-13 Saw-frame stretcher.

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