Improvements. in Horizontal Saw Frames.
Year: 1895

page_text: Date of Application, 28th Feb., 1 1895
:
Complete Specification Left, 28th Nov., 1895-Accepted, 4th Jan, 1890. *.
PROVISIONAL SPECIFICATION.
Improvements. in Horizontal Saw Frames.
•
We, JOHN KERSHAW and ROBERT KERSHAW of the Firm of Messrs. Kershaw
Brothers of Railway Iron Works, Hebden Bridge in the County of, York
Engineers and Wood-working Machinists, do hereby declare the nature of this
invention, to be as follows:-
The object of our invention is to simplify horizontal saw, frames, and construct
them so that they can work at a quicker speed and do more work.
P
We construct our.horizontal saw frames, with a vertical driving shaft journaled
on the cross slide, the crank, being upon the vertical shaft and having a horizontal
connecting rod to the saw frame, the orank of the, vertical, shaft is preferably
inside the working frame, but may be at the end of same or at one side.
The crank shaft has a sliding key its whole length passing through the pulley
and the shaft is elongated so that at each end it automatically or otherwise.lowers
to adapt.itself to the timber as it is sawn.

page_text: By our arrangement and construction of horizontal saw frames, we preferably
drive the crank shaft A, by means of pulley H fixed above the machine frame K,
and driven from the counter shaft L, by belt or rope from the driving ahaft.
Also for raising and lowering the saw-frame E, and cross slide B, we preferably
fix a shaft M at the bottom of the machine frame; upon this shaft are suitable
gear wheels N gearing with gear wheels P upon the screws R of the slide B,
this shaft M is operated from the quick return and forward motion shaft S, by
means of chain wheel S, driving a chain wheel T upon a suitable counter shaft T₁
at the side of the machine frame; this chain wheel T is loose upon the shaft T',
and is brought into gear with and drives the shaft T¹ when desired, by means of
hand lever U and connecting rod V, operating an ordinary catch box upon the
said shaft. This shaft T' operates a gear wheel Y gearing with a gear wheel V³
upon the shaft M, so operating the said shaft for the purposes described.
For feeding the timber when cutting, we preferably operate the table W from
the vertical crank shaft A. by means of suitable gearing Wand pulley W' operating
cone pulleys X at the other side of the machine frame, these cone pulleys ✗,
operate similar pulleys ✗¹, upon a counter shaft X³, this counter shaft X',
(by means of gear wheels Y), operates a worm upon a second shaft Y gearing
with a worm wheel Y' which operates the feed shaft Y, on which is the ordinary
pinion wheel Z, gearing with the rack Z¹ upon the table W, so feeding the timber J
to the saw J' as desired.
.
Also the table may have a quick return and forward motion imparted to it, by
means of loose gear wheel Z, upon the feed shaft Y', gearing with the quick
return or forward motion shaft S, and brought into gear by a suitable catch
box Z* upon the said shaft Y, operated by hand lever Z.
For adjusting the position of the saw to the timber, according to the thickness
of board required to be cut, I employ a suitable hand wheel R, upon a shaft R
on which is a gear wheel R³, gearing with gear wheel V, upon the shaft M
operating the slide B; also an indicator U₁ may be placed upon this shaft, to
indicate the distance the slide is raised or lowered.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, we declare that what
we claim is →
1. In horizontal saw frames, the use and employment of a vertical orank shaft,
for operating the saw frame in the manner and for the purposes substantially as
shown and described.
Dated this Twenty-sixth day of November 1695.
JOHN E. WALSH,
Crossley Street, Halifax, Patent Agent for the Applicants.