Improvements in or relating to Band-saw Machines.
Year: 1895

page_text: Date of Application, 9th May, 1895-Accepted, 15th June, 1895
Improvements in or relating to Band-saw Machines.
I, JOHANN ANTHON, of Flonsbung, in the German Empire, Manufacturer, do
hereby declare the nature of my said invention and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement
1
The object of my invention is to mount two or more band saws upon two or more
sets of palleys, in such a manner as to afford facilities for cutting boards of various
thicknesses and at various angles.
And in order that my said invention may be particularly described and ascor-
tained, reference is hereby made to the accompanying drawings, in which similar
letters of reference indicate corresponding parts.
Fig. is an elevation illustrating the application of my invention, showing two
band saws mounted on pulleys of different diameters.
Figs. 2 and 3 illustrate methods of varying the saw cuts.
Figs. 4 to 7 are detail views, un an enlarged scale, showing methods of forming
and operating the guide blocks.
The position of the lower axles of both the saw pulleys is fixed, but the axles of
the upper saw pulleys A and A' are mounted in separate bearings, so that each one
of the saw-bands may be capable of being stretched independently of the other, in
a vertical direction. The small pulley A is placed before the larger pulley A. to
enable the saw-band S to be lifted over the smaller pulleys. When both the saw-
bands S and S are stretched, parallel to each other, the distance apart of the
Baw-bands is equal to the distance in the radu of the pulleys, and when the board
is cut the thickness of such board corresponds with the difference in the radi,
minus the thickness of one saw-band,
In order to adapt tho apparatus to cutting boards of varying thickness and at
angles departing from a vertical line, I fit shifting band guides B B'; two of such
guides being fitted above the table and two below it, as shown. These guides can
be moved independently of each other horizontally, as shown in Fig. 2, in which
figure the guides B are shown moved outwards and the guides B' inwards, by which
the distance apart of the bands 13 increased. In making parallel cuts the upper
and lower guide blocks are adjusted vertically in line with each other. In making
diagonal cuts for feather edge and analogous boards, the guide blocks may be
arranged as illustrated by Fig. 3, to the right and left, as required.
Figs. 4 to 7 show two methods of constructing the guides. In Figs. 4 and 5,
four levers V, V' and T', T', pivoted at z and ', are regulated by screws as shown,
Fig. 4 being an elevation and Fig. 5 a plan. In Figs. 6 and 7 the guide
blocks 1, L, and L, L', ate fixed in the casing so as to be adjustable by means of
sot-screws R, across the direction of the cut These guide blocks are preferably
made of lignum vitæ wood.
Although two saw-bands only are shown in the drawings, it is obvious that three
or more bands may be fitted to one machine is an analogous manner.
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 improvements in or relating to band saw machines, substantially as and
for the purposes described.

page_text: 2. In band saw machines fitted with two or more band-saws as aforesaid, the
combination, therewith of independently adjustable guides, fitted above and below
the table, substantially as and for the purposes herein before described and
illustrated by the drawings.
D 1905
GEO.
DOWNING,
8, Quality Court, London, W.C., Agent.