Year: 1885

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nature of the said Invention, and in what manner the same is to be performed, to
be particularly described and ascertained in and by the following statement :—
This Invention consists of certain improvements in the construction of machines
for sawing stones, one of the main objects of the Invention being to obtain a direct
linear motion of the saw-frame during all periods of the work, as fully described
hereinafter.
On the accompanying drawings,
Fig. 1, represents a side view of the improved stone sawing machine.
Fig. 2, represents a vertical transverse section thereof; and
Fig. 3, represents a sectional plan.
A, represents the main fixed frame, consisting in the modification illustrated of
four vertical posts, two longitudinal stringers at the top, and transverse connecting
posts.
Guided on or by the four vertical posts of the fixed frame is a vertically
adjustable carriage bed B, consisting of an open rectangular frame, to the corners
of which are connected vertical supporting chains or ropes, b, which pass up over
pulleys, 61, on two horizontal shafts D, D₁, the ends of the chains or ropes being
connected to the pulleys.
On the same shafts, D, D¹, are pulleys, e, around which pass chains or ropes, e¹,
carrying counter-weights, E, for the carriage bed, B, the upper ends of these
cords, e¹, being connected to the peripheries of the pulleys, e. The counter-
weights, E, are made variable, by the removal of portions of the weights, to
properly counter-balance the carriage bed and saw frame according to the number
of saws employed. .
In order to ensure the counter-weights acting together to raise and lower the
carriage bed in truly horizontal planes, the two shafts D, D¹, are cranked, and
connected by a rod, F, so as to be caused to operate together.
The saw frame, G, consists of the usual rectangular frame, having any desired
number of saws adjustably secured thereto, and traverses on ways on the carriage
bed.

page_text: One end of the frame, G, is provided with a lug, g, having a vertical T-slot
fitting over or about a vertical T-bar, H, which is guided at the top and bottom
in ways, h, secured to the fixed frame. To this bar are pivotted two links, L,
connecting the bar to cranks on shafts, I, which are mounted in bearings on a
suitable upright or frame and are provided with fly wheels, J, and to either of
'which shafts rotary motion may be imparted by a belt passing over suitable
pulleys, as indicated. The cranks of the shafts are connected by a rod, K, which
causes them to move in unison and to impart a uniform movement to both ends of
the bar, H.
The stone, S, to be sawed, is mounted on a suitable truck adapted to travel on
ways, W, running between the upright posts of the frame.
It will be seen that by the above construction, and more particularly the
combination of the carriage forming ways for the saw frame, with the vertical
bar, H, (to which the saw frame is connected so as to move therewith but be free
to slide lengthwise thereon), in all positions of this carriage and saw frame, and at
all parts of its work, the pull on the saw frame is always a direct linear motion,
whereas with most other constructions of sawing machines, there is a tendency
to an angular pull on the saw frame, either at the beginning or at the end of
its work.
Having now particularly described and ascertained the nature of the said
Invention, and in what manner the same is to be performed, I declare that what
I claim is
1. The combination of the fixed frame of the machine and vertically adjustable
carriage bed, with a reciprocating bar, H, and the saw frame, G, guided on the said
carriage and connected to the reciprocating bar to move therewith but free to slide
lengthwise on the bar, substantially as herein before set forth.
2. The combination of the fixed frame and adjustable carriage bed, with a
reciprocating bar, H, operating crank shafts and links, and the saw frame mounted
on the carriage and connected to the reciprocating bar to move therwith but free
to slide lengthwise thereon, substantially as hereinbefore set forth.
3. The combination of the fixed frame and carriage bed carrying the traversing
saw frame, with suspending chains or ropes, crank shafts carrying pulleys over
which the said chains or ropes pass, counter-weights, and a rod connecting the two
crank shafts, substantially as hereinbefore specified.
4. The combination of the fixed frame and an adjustable carriage bed, with a
saw frame mounted on said carriage bed and having a T-slot and an upright
reciprocating T-bar adapted to the slot, substantially as hereinbefore described.
5. The combination of the traversing saw frame having a T-slot, with a guided
T-bar adapted thereto, two crank shafts, and links connecting the cranks with the
said bar, all substantially as hereinbefore set forth.
Dated this 23rd day of November 1885.
DAY, DAVIES, & HUNT,
321, High Holborn, London, W.Ç.,
Agents for the Applicant.