Improvements in Horizontal Saw Frames.
Year: 1886

page_text: Date of Application, 21st May, 1886.
Complete Left, 7th Feb., 1887.
Complete Accepted, 11th Mar., 1887.
PROVISIONAL SPECIFICATION.
Improvements in Horizontal Saw Frames.
I THOMAS NIELD ROBINSON. of the firm of Thomas Robinson and Son Limited, of
the Railway Works, Rochdale, in the County of Lancaster Machine Maker, do hereby
declare the nature of said Invention for IMPROVEMENTS IN HORIZONTAL SAW FRAMES,
to be as follows:-
My present invention relates to the machine for which Letters Patent were granted
to me on the 23rd day of December 1880 No. 5397 and the object of my Invention is
to improve the general construction and arrangement of the machine and to make the
saws more accessible by placing them outside the framing.
In carrying my Invention into effect. I support the main crossrail, which carries the
saws, on two vertical pillars, one of which may be of cast iron, preferably hollow, the
other pillar at the driving end of the machine is preferably of wrought iron or steel of
comparatively small diameter to permit the saws being placed near to one another.
To the crossrail which is made as narrow as practicable are cast or secured the
guides for one of the saws which is not adjustable the guides for the other or
adjustable saw are fitted and free to slide in slideways also on the crossrail; suitable
gearing is carried on the crossrail for raising and lowering the adjustable saw.
I employ as described in the aforesaid Patent a double throw crank with connecting
rods for actuating the saws.
The advantage of this arrangement of having one saw secured to fixed guides and
the other to adjustable guides on one and the same crossrail is that only one saw has
to be moved for adjustment and when the saws have been once set to cut a certain
thickness of board a whole log or number of logs can be cut into boards of that
thickness by simply moving the crossrail as required, this movement bringing down
simultaneously the two saws.

page_text: COMPLETE SPECIFICATION.
Improvements in Horizontal Saw Frames.
I THOMAS NIELD ROBINSON, of the firm of Thomas Robinson and Son Limited,
of the Railway Works, Rochdale, in the County of Lancaster, Machine Maker, do
hereby declare the nature of said Invention for IMPROVEMENTS IN HORIZONTAL SAW
FRAMES, and in what manner the same is to be performed, to he particularly described
and ascertained in and by the following statement
My present invention relates to the machine for which Letters Paient were granted
to me on the 23rd day of December 1880 No. 5397 and the object of my Invention is
to improve the general construction and arrangement of the machine and to make the
saws more accessible by placing them outside the framing.
In carrying my Invention into effect I support the main cross-rail which carries the
saws on two vertical pillars, one of which may be of cast iron, preferably hollow,
the other pillar, at the driving end of the machine is preferably of wrought iron or
steel of comparatively small diameter to permit the saws being placed near to one
another.
To the cross rail which is made as narrow as practicable are cast or secured the
guides for one of the saws which is not adjustable; the guides for the other or
adjustable saw are fitted and free to slide in slideways also on the cross-rail; suitable
gearing is carried on the cross-rail for raising and lowering the adjustable saw.
I employ as described in the aforesaid Pafent a double throw crank with connecting
rods for actuating the saws.
And in order that my Invention may be fully understood and readily carried into
effect I will describe the accompanying four Sheets of Drawings, reference being had
to the figures and letters marked thereon.
Figure 1 is a front elevation and Fig. 2 a plan of a double horizontal saw frame
embodying my improvements.
In these views is the main cross-rail which carries the guides for the two saws.
In the horizontal saw frame as described in the Specification to my aforesaid Pateni
each saw had a separate guide or cross-rail and each guide was adjustable either
simultaneously or separately by means of screws and wheels the cross-rails being
carried by four standards.
Now, according to my present improvements I employ only one main cross-rail a
which is made as narrow as practicable and is supported by only two vertical pillars or
standards of which the standard is the larger and is preferably of hollow cash
iron and the standard is much smaller and is preferably of wrought iron or steel in
order to obtain the necessary strength, and at the same time to permit the saws co¹io
be placed as near as possible to one another. The cross-rail which is free to he
raised or lowered on the standards as required by means of screws and gears d
carries the guides for both the saws c. The guides a' for the saw frame c are cast
with or secured to the cross-rail a and are not adjustable. The guides a for the saw
frame care fitted in slides in the cross-rail and are adjustable vertically by means of

page_text: screws e and gears e¹ operated by turning the shaft by a ratchet lever or otherwise
whereby the position of the guides and thus of the saw can be adjusted with
respect to the saw according to the thickness of the board to be sawn from the log
The frames of the saws c c are connected by rods to the double cranked shaft h
which is constructed arranged and operated substantially in the same manner as
described in my aforesaid Patent.
The log is supported on the log carriage
usual.
which is constructed and actuated as
The advantage of this arrangement of having one saw working in fixed guides a
and the other saw c¹ working in adjustable guides a on one and the same cross-rail a
is that only one saw, i.c. the saw e¹ has to be moved for adjustment and when the saws
have been once set to cut a certain thickness of board a whole log or a number of logs
can be cut into boards of that thickness or those thicknesses by simply moving the
cross-rail a as required by means of the screws and gears this movement simul-
taneously raising or bringing down the two saws.
Having now particularly described and ascertained the nature of my said Invention
and in what manner the same is to be performed I declare that what I claim is-
1. In a double horizontal saw frame the combination with a saw supported in fixed
guides, of a saw supported in adjustable guides, both sets of guides being secured to
one and the same cross-rail.
2. In a double horizontal saw frame the combination with a double throw cranked
shaft for actuating the two saws, of a single main cross-rail provided with two sets of
guides one fixed and one adjustable in which guides the said saws work, substantially
as herein set forth.
3. The construction combination and arrangement of parts constituting my
Improvements in horizontal saw frames substantially as herein described and as
illustrated by the accompanying Drawings.
H. B. BARLOW,
17, St. Ann's Square, Manchester,
Agent for Applicant.