US509256A - Frame-saw - Google Patents

Frame-saw Download PDF

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US509256A
US509256A US509256DA US509256A US 509256 A US509256 A US 509256A US 509256D A US509256D A US 509256DA US 509256 A US509256 A US 509256A
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saw
frame
handle
corner
doubled
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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

  • This-invention relates to an improvement in frame-saws, the object in view being to produce a frame of increased stiffness which willhold the -saw-blade under greater tension, and which will provide better means by which to handle the saw, further desiderata being simplicity of construction, strength and durability.
  • FIG. 1 shows a side elevation of a saw constructed in accordance with my invention.
  • Fig. 2 shows a detail view of a handle at the back of the saw, one side of said handle being removed.
  • Fig. 3 shows a cross-section of said handle.
  • the frame of the saw is composed of a single" metal bar oblong in cross-section, and forming a curved back-bar, a, and side or end-bars, b, b, which are curved or bowed outward.
  • the metal bar is doubled to form a loop, a, at the corner where the back and side, b, meet, the back being bent outward on a sharp angle, as at c, and curved around into the side, b.
  • the saw-blade, d is secured at its opposite ends to the two sides,- 12,1) and it will be understood that the said sides are compressed toward each other before the saw-blade is connected with them, so that when relieved the tension of the sides subjects the saw-blade to a strain which holds it stiff. It will be observed that the short bend of the metal at the corner as described, tends to stifien the same,and thereby increase the the strain on the saw-blade.
  • the side, I) is extended beyond the sawblade and receives a wooden handle, 6, and to increase the facility with which the saw can be handled, I provide another handle which is formed by doubling the metal of the frame at the corner where the side, I), and back, a, meet so as to form a doubled portion, (5*, projecting substantially at right Serial No. 469,701. (No model.)
  • the oblong dimension of the cross-section of the saw-frame is in the direction of its length and thereby increases the stiifness of the frame and the tension of the saw-blade.
  • the saw is simple in construction and possesses great durability.
  • a frame-saw having a frame composed of a single metal bar which is doubled at one corner, the doubled portion projecting outward substantially at right angles to the back, as and for the purpose described.
  • a frame-saw having a frame composed of a single metal bar which is doubled at one corner, the doubled portion projecting outward substantially at right angles to the back, and the side of the frame which extends from said corner projecting beyond the saw-blade to form a handle.
  • a frame-saw having a frame composed of a single metal bar which is doubled into the form-of a loop at the corner diagonally opposite the handle of the saw and projecting outward from the back, one side of the loop forming a sharp angle with the back, as and for the purpose described.
  • a frame-saw having a frame composed of a single metal bar, doubled at one corner to form a handle and the side of the frame which extends from said corner projecting beyond the saw-blade to form a handle, and curved or bowed outward as described.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)

Description

(No Model.)
N. S. SNELL. FRAME SAW.
No. 509,256. Patentedllov. 21, 1893.
INV'ENTEIRZ UNITED STATES PATENT OFFICE.
NORMAN S. SNELL, OF BRIGHTON, ASSIGNOR, BY DIREOTAND MESNE ASSIGNMENTS, TO THE BUTLER MANUFACTURING COMPANY, O
BOSTON, MASSACHUSETTS.
FRAM E-SAW.
SPECIFICATION forming part of Letters Patent No. 509,256, dated November 21, I893.
Application filed April 10, 1893- To all whom it may concern:
Be it known that I, NORMAN S. SNELL, of Brighton, in the county of Sufiolk and State of Massachusetts, have invented certain new and useful Improvements in Frame-Saws, of
which the following is a specification.
This-invention relates to an improvement in frame-saws, the object in view being to produce a frame of increased stiffness which willhold the -saw-blade under greater tension, and which will provide better means by which to handle the saw, further desiderata being simplicity of construction, strength and durability.
To these ends the invention consists in the novel features of construction hereinafter described and claimed.
The accompanying drawings illustrate a construction by which my invention may be carried out. Figure 1 shows a side elevation of a saw constructed in accordance with my invention. Fig. 2 shows a detail view of a handle at the back of the saw, one side of said handle being removed. Fig. 3 shows a cross-section of said handle.
The frame of the saw is composed of a single" metal bar oblong in cross-section, and forming a curved back-bar, a, and side or end-bars, b, b, which are curved or bowed outward. The metal bar is doubled to form a loop, a, at the corner where the back and side, b, meet, the back being bent outward on a sharp angle, as at c, and curved around into the side, b. The saw-blade, d, is secured at its opposite ends to the two sides,- 12,1) and it will be understood that the said sides are compressed toward each other before the saw-blade is connected with them, so that when relieved the tension of the sides subjects the saw-blade to a strain which holds it stiff. It will be observed that the short bend of the metal at the corner as described, tends to stifien the same,and thereby increase the the strain on the saw-blade.
The side, I), is extended beyond the sawblade and receives a wooden handle, 6, and to increase the facility with which the saw can be handled, I provide another handle which is formed by doubling the metal of the frame at the corner where the side, I), and back, a, meet so as to form a doubled portion, (5*, projecting substantially at right Serial No. 469,701. (No model.)
angles to the back, a. Wood side pieces, a are fastened over this doubled projecting portion. It will be seen that the facility with which the saw may be handled is greatly 1ncreased by this construction as one hand may grasp the handle, 6, while the other hand grasps the handle, e The outward curved or bowed sides, I), I), allow of a greater sweep of the saw after having entered the material or body being out.
It will be Observed that the oblong dimension of the cross-section of the saw-frame is in the direction of its length and thereby increases the stiifness of the frame and the tension of the saw-blade. The saw is simple in construction and possesses great durability.
Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is
1. A frame-saw, having a frame composed of a single metal bar which is doubled at one corner, the doubled portion projecting outward substantially at right angles to the back, as and for the purpose described.
2. A frame-saw, having a frame composed of a single metal bar which is doubled at one corner, the doubled portion projecting outward substantially at right angles to the back, and the side of the frame which extends from said corner projecting beyond the saw-blade to form a handle.
3. A frame-saw, having a frame composed of a single metal bar which is doubled into the form-of a loop at the corner diagonally opposite the handle of the saw and projecting outward from the back, one side of the loop forming a sharp angle with the back, as and for the purpose described.
4. A frame-saw having a frame composed of a single metal bar, doubled at one corner to form a handle and the side of the frame which extends from said corner projecting beyond the saw-blade to form a handle, and curved or bowed outward as described.
In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, this 11th day of I00 February, A. D. 1893.
NORMAN S. SNELL.
Witnesses:
SAMUEL J. HUTOHINSON, CHARLES 1L. HOLLAND.
US509256D Frame-saw Expired - Lifetime US509256A (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747630A (en) * 1952-09-09 1956-05-29 Sandvikens Jernverks Ab Bow saw with spring metal saw bow

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2747630A (en) * 1952-09-09 1956-05-29 Sandvikens Jernverks Ab Bow saw with spring metal saw bow

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