Improved Frame-saw.
Year: 1893

page_text: Date of Application, 21st Nov., 1893-Accepted, 6th Jan., 1894
Improved Frame-saw.
I, WILLIAM LLOYD WISE, of No. 46, Lincoln's Inn Fields, in the County of
London, Consulting Engineer and Chartered Patent Agent, do hereby declare the
nature of this invention, a communication to me from abroad by The Butler
Manufacturing Company of 7 Beacon Street, Boston, Massachusetts, United States,
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement:-
This invention relates to an improvement in frame-saws, the object in view
being to produce a frame of increased stiffness which will hold 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 drawing illustrates a construction by which the invention
may be carried out.
Figure 1 shows a side elevation of a saw constructed in accordance with the
invention.
Figure 2 shows a detail view of a handle at the back of the saw, one side of said
handle being removed.
Figure 3 is a cross-section of Fig. 2. on line 3-3.
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 c, 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 b, b', 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-blades 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 stiffen the same, and thereby increase the strain on
the saw-blade.
The side, 61, is extended beyond the saw-blade and receives a wooden handle, e,
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 b¹, and back a, meet so as to form a doubled portion e, projecting
substantially at right angles to the back, a. Wood side pieces, e, are fastened
over this doubled projecting portion. It will be seen that the facility with which
the saw may be handled is greatly increased by this construction, as one hand may
grasp the handle, e, while the other hand grasps the handle, e³.
The outward curved or bowed sides, b, b', allow of a greater sweep of the saw
after having entered the material or body being cut.
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 stiffness of the
frame and the tension of the saw-blade. The saw is simple in construction and
possesses great durability.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, it is declared that what is
claimed is:
1st. A frame-saw, having a frame composed of a single metal bar which is

page_text: doubled at one corner, the doubled portion projecting outward substantially at right
angles to the back, as and for the purpose described.
2nd. 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.
3rd. 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.
4th. 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.
Dated this 21st day of November 1893
W. LLOYD WISE,
Per F. J. Brougham.