Improvements in Band Saw Guides.
Year: 1896

page_text: Complete Specification Left, 19th Nov., 1896-Accepted, 23rd Jan., 1897
Improvements in Band Saw Guides.
WILLIAM MCBETH, of the City of Hamilton, in the County of Wentworth,
in the Province of Ontario, Dominion of Canada, Machinist, do hereby declare
the nature of this invention to be as follows:-
My invention relates to improvements in band saw guides in which two
independent, adjustable and revolving side wheels, and a small adjustable rear
wheel operate in conjunction with the vertical part of the band saw above the
table of the machine.
Figure 1, is a side elevation of the device with its horizontal arm, broken, which
connects the device to the band saw in position also broken.
Figure 2, is a plan, and
The broken end of the horizontal arm A, fits in a socket above, and in rear of
the table of all band saw machines and is capable of inver and outer, as well as
vertical adjustment, in order to suit various distances as well as different
thicknesses of wood to be sawed. This said arm supports the framework B,
which is capable of horizontal adjustment, and held in position to suit the band
saw C, by means of the set screw D, and to prevent said framework from turning,
a pin E, is applied, which fits into the horizontal slot F, of said arm, this pin
forming a part of the interior of the hub of said framework.
This framework has a vertical opening, centrally located, to allow the band saw
free course, and also to allow for the complete separation and independency of the
two curved side arms H, which support the guide wheels J, by means of the
adjustable bearings K, which pass through the hubs 2, of said side arms H, and
held in adjusted position to suit the saw by means of set screws M. The upper
part of these side arms H, are constructed to form bevelled slides 3, which fit
between the bevelled lips 4, on the under part of the upper divided frame B,
therefore enabling the said arms to slide and be adjusted with their wheels J, to
position, that is, the inner face of the wheels slightly engaging with the flat sides
of the saw, and held by means of the set screws N. The back of the band saw
also engages with the face of the smaller wheel O, in fork P, which is suspended
from and secured to the inner end of the arm A, by means of central screw R, and
pin S, said pin will prevent any possibility of the said suspended fork from turning
from position, this being very important.
It will be perceptible that the important elements in the construction of this saw
guide are, the adjustability of the side wheels to suit different thicknesses of saws,
also the rear wheel O, may be adjusted to position to suit different breadths of
saws, and held by set screw D.
These guide wheels have conical bearings T, which with their wheels J, revolve
in the inner sockets of the rigid bearings K, which are supplied with outer end,
and upper oil cups provided with pivoted covers 5, the oil flows from said oil cups
to the conical points of bearings T, through an opening through each of the four
adjustable bearings K.
Dated this 30th day of March 1896.
JOHN H. HENDRY,
Agent.

page_text: WILLIAM MCBETH, of the City of Hamilton, in the County of Wentworth,
in the Province of Ontario, Dominion of Canada, Machinist, do hereby declare
the nature of this invention and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement:-
My invention relates to improvements in band saw guides in which two
independent adjustable and revolving side wheels, and also a small adjustable
rear wheel, operate in conjunction with the vertical part of the band saw, above
the table of the machine, and the objects of my improvements are, first, to
provide revolving side guides to retain the band saw in vertical position, thus
preventing torsion, and yet allowing perfect freedom to the running of the saw,
second, to provide a rear revolving pressure support for the saw immediately in
rear of the said side guides, third, to afford facilities for the proper adjustment.
of these guides independently of each other in respect of the band saw, and
fourth, to reduce the friction of the two operating side guides, and the operating
rear pressure support to a minimum, and to prevent crystallizing or abrasion.
Reference being made to the drawing left with the Provisional Specification and
the oue accompanying the Complete Specification.
Figure 1, is a side elevation of the device with its horizontal arm, broken, which
connects the device to the band saw in position also broken.
Figure 2, is a plan, and
Figure 3, is a front elevation of the same.
Figure 4, is a front detail elevation of the detached rear pressure support, and
Figure 5, is a side elevation of the same.
The broken end of the horizontal arm A, fits in a socket above, and in rear of
the table of all band saw machines and is capable of inner and outer, as well as
vertical adjustment, in order to suit various distances as well as different thicknesses
of wood to be sawed. This said arm supports the framework B, which is capable
of horizontal adjustment, and held in position to suit the band saw C, by means of
the set screw D, and to prevent said framework from turning, a pin E, is applied,
which fits into the horizontal slot F, of said arm, this pin forming a part of the
interior of the hub of said framework.
This framework has a vertical opening, centrally located, to allow the band saw
free course, and also to allow for the complete separation and independency of the
two curved side arms H, which support the guide wheels J, by means of the
adjustable bearings K, which pass through the hubs 2, of said side arms H, and
held in adjusted position to suit the saw by means of set screws M. The upper
part of these side arms H, are constructed to form bevelled slides 3, which fit
between the bevelled lips 4, on the underpart of the upper divided frame B,
therefore enabling the said arms to slide and be adjusted with their wheels J, to
position, that is, the inner face of the wheels slightly engaging with the flat sides
of the saw, and held by means of the set screws N. The back of the band saw
also engages with the face of the smaller wheel O, in fork P, which is suspended
from and secured to the inner end of the arm A, by means of central screw R, and
pin S, said pin will prevent any possibility of the said suspended fork from turning
from position, this being very important.
It will be perceptible that the important elements in the construction of this saw
guide are, the adjustability of the side wheels to suit different thicknesses of saws,
also the rear wheel O, may be adjusted to position to suit different breadths of
saws, and held by set screw D.
These guide wheels have conical bearings T, which with their wheels. J, revolve

page_text: in the inner sockets of the rigid bearings K, which are supplied with outer end,.
and upper oil cups provided with pivoted covers 5, the oil flows from said oil cups
to the conical points of bearings T, through an opening through each of the four
adjustable bearings K.
It will be observed that by the fact of the band saw revolving these wheels,.
there will be no crystallizing, or abrasion of the sides of the saw, which is very
important, the former preventing the thickening of parts of the sides of the saw by
a hard gummy matter which is very disadvantageous, and the latter preventing the
saw from wearing out, and especially from breaking, therefore this system of
guiding and rear supporting of the saw, is perfect, and essential to good work, and
the duration of the saw.
The smaller rear wheel which is also revolved by the saw is especially applicable-
when great pressure is brought to bear upon the saw, when forcing heavy wood
through the same, thus the saw is retained in its proper vertical position, this.
being necessary to prevent imperfect work and breakages.
Having now particularly described and ascertained the nature of my said inven
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1st. In a band saw guide, the combination of adjustable side wheels, supported
by arms H, having upper bevelled slides to fit and slide in the jaws of upper-
framework for side adjustment and secured thereto by means of set screws and
capable of horizontal adjustment on arm A, substantially as described and set-
forth.
2nd. The horizontal arm of a band saw machine in combination with the rear
pressure wheel, suspended from said arm by means of fork connection substantially
as described and set forth.
3rd. In a band saw guide the adjustable side wheels, supported by curved arms.
having upper slides, for side adjustment in frame and fastened with screws and.
capable of horizontal adjustment on arm A, in combination with a rear wheel
supported in fork connection secured to said arm, substantially as described and.
set forth.
Dated this 9th day of November 1896.
JOHN H. HENDRY,
Agent.