IMPROVEMENTS APPLICABLE TO UPRIGHT LAND DRAY SAW FRAMES
Year: 1874

page_text: LETTERS PATENT to William Meadows, of the Firm of T. and W.
Meadows, of Heaton Norris, in the County of Lancaster, Timber
Merchants, for the Invention of "IMPROVEMENTS APPLICABLE TO UPRIGHT
LAND DRAY SAW FRAMES
"
PROVISIONAL SPECIFICATION left by the said William Meadows at
the Office of the Commissioners of Patents, with his Petition, on
the 30th March 1874.
"
I, WILLIAM MEADOWS, of the Firm of T. and W. Meadows, of Ḥcaton
Norris, in the County of Lancaster, Timber Merchants, do hereby
declare the nature of the said Invention of "IMPROVEMENTS APPLICABLE
TO UPRIGHT LOG AND DEAL SAW FRAMES," to be as follows: -
:
The object of this Invention is to obviate the use of textile bags for
preventing the sawdust from log and deal saw frames getting on to the
crank and crank shaft bearings of such machines, and to substitute a
more durable and mechanical contrivance for the purpose..

page_text: Now this Invention consists of a metallic or wooden plate, which
slides upon the sloping trough usually employed for leading tho sawdust
away from under the saws, so as to cover the opening or slot formed in
such trough (and which has hitherto been covered with bags of textile
fabric as herein-before mentioned), and yet allow the connecting rod to
pass through. This is effected by having a hole formed in such plate
through which the connecting rod passes, and on the under side of such
plate a metallic ring is mounted upon trunnions working in suitable
bearings, so that as the connecting rod passes through such ring the
sliding plate is moved backwards and forwards, and thus allows for the
varying motion of the connecting rod, whilst the sawdust is effectually
prevented getting on to the crank and crank shaft bearings.
SPECIFICATION in pursuance of tlic conditions of the Letters Patent,
filed by the said William Meadows in the Great Scal Patent Office
on the 30th September 1874.
TÓ ALL TO WHOM THESE PRESENTS SHALL COME, I, WILLIAM
MEADOWS, of the Firm of T. and W. Meadows, of Heaton Norris, in the
County of Lancaster, Timber Merchants, send greeting...
WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent bearing-date the Thirticth day of March, in the year of
our Lord One thousand cight hundred and seventy-four, in the thirty-
seventh year of Her reign, did, for Herself, Her heirs and successors,
give and grant unto me, the said William Meadows, Her special licenco
that I, thic said William Meadows, my executors, administrators, and
assigns, or such. others as I, the said William Meadows, my excoutors,
administrators, and assigns, should at any time agree with and no
others, from time to time and at all times thereafter. during the term
therein expressed, should and lawfully might make, use, exercise; and.
vend, within the United Kingdom of Great Britain and Ireland, tho
Channel Islands, and Isle of Man, an Invention for "IMPROVEMENTS
APPLICABLE TO UPRIGHT LOG AND DEAL SAW FRAMES," upon the condition
(amongst others) that I, the said William Meadows, my executor's or
administrators, by an instrument in writing under my, or their, or one
of their hands and seal, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to
:

page_text: be performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
->
“NOW KNOW YE, that I, the said William Meadows, 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:—
:.
The object of this Invention is to obviate the use of textile bags for
preventing the sawdust from log and deal saw frames getting on to the
crank and crank shaft bearings of such machines, and to substitute a
more durable and mechanical contrivance for the purpose.
: Now this Invention consists of a metallic or. wooden plate, which
slides upon the sloping trough usually employed for leading the sawdust
away from under the saws, so as to cover the opening or slot formed in
such trough (and which has hitherto been covered with bags of textile
fabric as herein-before mentioned) and yet allow the connecting rod to
pass through. This is effected by having a hole formed in such plate
through which the connecting rod passes, and on the under side of such
plate a metallic ring is, mounted upon trunnions working in suitable
bearings, so that as the connecting rod passes through such ring the
sliding plate is moved backwards and forwards, and thus allows for the
varying motion of the connecting rod, whilst the sawdust is effectually
prevented getting on to the crank and crank shaft bearings.
Inorder that this my said Invention may be more readily understood
and carried into practical effect, I have hereunto annexed a Drawing illus
trative of my improvements. Similar letters marked on the several
'views are used to denote similar parts.`
Fig. I is a side sectional view; Fig. 2, a front elevation; and Fig 3,
a plan of so much of a log frame and deal saw frame as is necessary
to illustrate my improvements, which are shewn as applied thereto, and
drawn to a scale of about 3/4 inch to the foot.
Fig. 4 represents an enlarged side section of a portion of Fig. I drawn
to a scale of about size. Fig. 5 is a plan of Fig. 4, and Fig. 6 a
vertical section of Fig. 4 through the line a-b.
J
Fig. 7 is a side section of a modification of my Invention; and Fig. 8
is a plan of the same drawn to about size.

page_text: In Figs. 1 to 6 inclusive A represents the crank of the driving shaft,
and B the connecting rod, which at its upper extremity is connected to;
the saw frame in the ordinary manner. C is the sloping table usually;
employed. for. leading the sawdust away from under the saws. The
opening D through which (to allow the connecting rod B to pass) has
hitherto been covered with bagging or textile material, but which
opening in accordance with this Invention is covered by a sliding cover E
constructed of metal or wood. This sliding cover E extends the entire
length of the table C, and is provided with overhanging sides e (as seen
best in Fig. 6), which are constructed on their inner sides with tongues
or projections e¹, which take into corresponding grooves formed in the
raised sides F of the opening D, and thus constitute a perfect sliding
cover to such opening without affording any lodgment for sawdust. In
this sliding cover a suitable opening G is formed to permit the connecting
rod B to pass through, and this opening is fitted with a metallic ring H,
which embraces the connecting rod, for which purpose it may be formed
in two halves bolted together by the bolts H', as illustrated. This ring
is also provided with trunnions H³, shewn dotted in Figs. 4, 5, and 6,
working in brackets I secured to the under side of the sliding cover E,
so that by means of the connecting rod reciprocating through such ring
the sliding cover E is caused to slide up and down, the sloping table C
meanwhile covering the opening D through the same, and thus effectually
preventing the sawdust getting on to the crank shaft or its bearings.
-
As a still further security against the sawdust. finding its way down
between the oscillating ring H and the opening G in which it. works I
cover such opening and ring entirely with a piece of sheet vulcanised
india-rubber or other suitable material J secured to the upper side of tho
sliding cover E, and in order to prevent the sawdust obtaining access
between the ring H and the connecting rod B, and at the same time as
a means of lubricating such ring I construct an annular space K in the
ring, which I prefer to fill with hemp and tallow or other suitable lubri-
cating packing material, and I cover such space with a metallic plate L
bolted to the upper side of the ring by the bolts M.
The modification illustrated by Figs. 7 and 8 only differs from the
preceding in the form of ring, which in this case partakes of the
character of a ball-and-socket joint, N being the ball part of the joint
and O the socketed portion, which is bolted together in two halves by the
holts P

page_text: In the modification the trunnions upon the ring are dispensed with,
and the socketed portion O is secured rigidly to the sliding cover.
Having thus particularly described and ascertained the nature of this
my said Invention, together with the best methods with which I am
acquainted for carrying the same into practical effect, I wish it to be
understood that I do not confine myself to the precise details, relative
proportions, or dimensions, of the several parts of the sliding cover
hercin-before described and illustrated on the accompanying Drawing,
as the same may be considerably varied without departing from the
Invention, but what I claim is the use of a sliding cover for preventing
the sawdust getting on to the crank shaft and bearings of log saw frames
and deal saw frames, substantially as described and illustrated on the
accompanying Drawing.
In witness whereof, I, the said William Meadows, have hereunto
set my hand and seal, this Twenty-ninth day of September,
in the year of our Lord One thousand eight hundred and seventy-
four.