Improvements relating to Stone-saw Frames.
Year: 1899

page_text: PROVISIONAL SPECIFICATION.
Improvements relating to Stone-saw Frames.
I, THOMAS PAWSON, of Ashburnham, Lidgett Lane, Moor Allerton, Leeds, in
the County of York, Quarry Owner, do hereby declare the nature of this inven-
tion to be as follows:-
My invention relates to stone-saw frames, the object being to balance such
frames so as to obtain an increased speed with less driving power, at the same
time obtaining a more even and regular stroke, and thus allowing the frame to
be driven at a much higher speed without jumping or jerking.
In constructing my improved saw frame I extend the rods by which the
frame is suspended, and attach at the upper ends, above the pivots, a suitable
weight or weights to counterbalance the weight of the frame. The said weights
are preferably attached to crossbars on each pair of rods, but may be arranged
at each corner, or in any convenient position.
In my improved saw frame the spears or connecting rods which drive the
frame are preferably attached at the centres of both sides of the frame. The said
spears are preferably actuated from spur wheels at each end of an electric motor.
1
of Databo 1900
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Patent Agent for the Applicant.
Improvements relating to Stone-saw Frames.
I, THOMAS PAWSON, of Ashburnham, Lidgett Lane, Moor Allerton, Leeds, in
the County of York, Quarry Owner, do hereby declare the nature of this inven-
tion, and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:.
-
My invention relates to stone saw frames, the object being to balance such
frames so as to obtain an increased speed with less driving power, at the same
time obtaining a more even and regular stroke, and thus allowing the frame to
be driven at a much higher speed without jumping or jerking.
In constructing my improved saw frame I extend the rods by which the
frame is suspended, and attach at the upper ends, above the pivots, a suitable
weight or weights to counterbalance the weight of the frame. The said weights
are preferably attached to crossbars on each pair of rods, but they may be arranged
at each corner, or in any convenient position..

page_text: DESCRIPTION OF DRAWINGS.
Fig. 1 is a front elevation of a saw frame constructed in accordance with
my invention.
Fig. 2 is a partial side elevation (in section) showing one of the suspending
rods with balance weight.
Fig. 3 is a plan of balance weight carried by a pair of suspending rods.
A is the saw frame suspended by rods B B from the shaft or axle C. The said
rods B B are extended upwards above the shaft C, and terminate in shoes or
brackets D D to which a crossbar or girder E is bolted or otherwise rigidly
attached, the said crossbar E carrying a balance weight F so arranged as to
exactly counterbalance the weight of the frame A and its suspending rods B B.
A series of detachable balance weights G, fitting in tapered holes H in the
weight F, are provided to counterbalance the saw blades in the frame A, the
number and position of these weights G being varied to correspond with the
number of saw blades in operation.
If desired the balance weight or weights may be suspended from the said
crossbar E, or the rods B may each terminate in a separate balance weight, or
suitable balance weights may be otherwise arranged in any convenient manner.
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 stone saw frame, the employment of a balance weight or weights to
counterbalance the weight of the frame in its oscillation about the pivotting
shaft or axle, substantially as, and for the purposes, shown and described.
(2) In a stone saw frame, the balancing mechanism arranged substantially as
described and as illustrated at Figs. 1, 2, and 3 of the accompanying drawings.
Dated his 02nd day af T..1.. 1000
JOHN E. WALSH,
Royal Exchange Chambers, Boar Lane, Leeds,
Patent Agent for the Applicant.