Year: 1887

page_text: Date of Application, 28th Oct 1887
Specification Accepted, 6th Dec., 1887
I PETER JOHN Mouw of 2 Islip Street, Kentish Town, in the county of Middlesex
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
The object of this invention is to provide a guide for band saw blades, which while
being simple in its parts, and easy to regulate, can be adjusted so that the upper guide
supports the saw blade close to its work, at the same time permitting the operator a
full view of the teeth as they enter the work.
For this purpose both upper and lower guide boxes are furnished with a horizantal
movement so that they can be adjusted to suit the back of the saw blade, while two
horizontal square strips of steel, or other suitable metal, let into grooves in the front
of the box, form the surface against which the back of the saw runs.
These strips can be shifted laterally or turned so as to present a new surface when
the saw has worn a groove in them.
The saw blade is steadied between two metal jaws, passing through the centre of
the guide box, and adjustable backwards & forwards so as to suit blades of various
widths.
These jaws are adjusted to suit the thickness of the blades, by thumbscrews, and
being furnished with springs, tending to force them apart as much as the adjusting
screws will allow, remain open when the saw is removed for changing or other
purposes, & are thus rigidly maintained in position.
The blade passing between two close fitting surfaces of hard metal, the cutting
line of the teeth cannot deviate from its normal position, when the material is turned
for sweep-cutting, and as the teeth are allowed to project in front of the guides, an
uninterrupted view of the saw-cut is presented to the operator.
DESCRIPTION OF THE DRAWINGS.
Figures 1 & 2 are side elevations of the top and bottom guides respectively, and
figures 3 & 4 are front elevations of the same.
In these figures the same letters refer to like parts.
A is the upper part of the top guide box, which is affixed to the bar a, which latter
has a vertical adjustment.

page_text: B is the lower part of the top guide box arranged to slide backwards or forwards
by means of the dovetail slot cut in the under-part of A, and is held in position by the
thumbscrew b.
C is the main portion of the lower guide box, the position of which being always
just under the saw table k, no vertical adjustment is necessary, whereas the backward
and forward adjustment, which in the case of the top guide is effected by the
slide A B, is here obtained by the rod n. which can be pushed in or out of the main
casting of the machine g, and held in the required position by the set screw h.
ccec are the reversible strips against which the back of the saw j runs, and which
resting in the slots cut in B in the case of the top guide, & C in the case of the bottom
guide, are held lightly in position by the springs d d, so that they can be readily slid
along or turned as they wear.
The jaws iaia which support the sides of the saw j, can be pushed backwards and
forwards to suit saws of different widths, & are held in position by the thumbscrews e e,
working in the slots, the jaws a heing adjusted to suit the thickness of the
various saws by the thumbscrews ff. The springs placed in the slots m. m. m.
between the jaws, exerting a gentle but continual outward pressure.
It will be seen that the adjustable bars a and n, the casting g, the saw j and the saw
table have nothing to do with this invention, being merely shown in with a view to
indicating the relative positions which the guides bear to any ordinary band saw
machine.
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 :-
1. The employment in apparatus for guiding band saws of lateral side guides of
steel or other hard metal readily adjustable as herein before described, by means of
screws, to suit for saws of any width or thickness in conjunction with reversible back
supports with lateral adjustment of steel or other hard metal above and below the
same.
Dated this 28th day of Astaha 1007