Improvements in Reciprocating Sawing Machines.
Year: 1895

page_text: Date of Application, 19th Aug., 1895-Accepted, 23rd Nov., 1895
Improvements in Reciprocating Sawing Machines.
WILLIAM HENDERSON Engineer and Hair Seating Manufacturer Glen Factory
Bruton Somerset do hereby declare the nature of this 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 has for its object the improvements of reciprocating sawing
machines.
In the ordinary horizoital & verticle saws, a heavy iron or steel frame and
slides is worked backward and forward with the saws which is the cause of
much vibration on the crank pin and driving shaft and requires considrable
foundation and of course great expence and much wear & tear. Instead of which
I form a frame such as shown in Fig. 2 and erect wheels or quadrant levers over
each I pass a chain or any other flexible substance. In between these I fix the saw
and screw bar with right & left hand screw with this I screw the whole up tight.
In the centre of the same frame I erect the driving shaft with tight and loose
pulley. On each end of shaft 1 fix fly wheels with crank pins in each and connecting
rods extending right & left to pins on chain wheels or quadrants which are moved
backward and forward and give sufficient traverse to saw the screw bar on other
side moves nt the same time in opposite direction balancing saw and the two saws
when cutting, work in opposite direction, thus balancing cut so the saw can be
worked without foundation. On frame H H is fixed two roller guides by
castings A A Figs. 3 & 5 to take thrust and guide the saw as explained in drawing
the frame saws and guides can be raised and lowered the same as ordinary hori-
zontal, but the back saw can be raised & lowered independant of frame H H. In
the verticle saw for breaking up logs &c. a saw can be used at each side all saws
have roller guides.
DISCRIPTION OF DRAWINGS.
Fig. 1 is front elevation A is driving shaft with tight and loose pulley A 1 and fly
wheel A 2. B B is two connecting rods which connect driving shaft with chain
wheels C. C. giving motion to saw E and rod D whch has right & left screw for
tightening saw E. G. G. shows ends of steel rollers in bearings of chain
wheels C. C. H. H. is cross frame which rise and fall with screws as in ordinary
horizontal saws.
I. I is upright frame J. J. is botton frame. K. K. is chains that
saw E and screw bar D is held in. F. F. is roller guides fixed on frame H. H by
castings A. A. On each guide one of the rollers has a flange for taking thrust of
cut on back edge of saw. The top and bottom rollers hold the saw flatways thus
guiding and supporting saw in cut.
Fig. 2 is plan of frame H. H. with part broken off to show saw E. and roller
guides F. F. A1 is driving pullys A 2 fly wheel with crank pin in same, and
connecting rods B. B. for driving chain wheels C. C. L. L. shows V slides of
brackets of back chain wheels for rising & lowering saw independant of frame H. H.
for adgusting thickness of second plank roller guides used on back saw.
Fig. 3 is an inlarged view of roller guides F. F. Castings A. A. with shank B
is fastened to frame H sleave C is drawn on to shank B. and held with set screw
for adgusting hight of guide. Sleave G is bolted on to long end of sleave C with
room in slotts to adgust sleave G horizontaly then shank D is inserted into

page_text: sleave G and held with set screws shank D can be turned round or moved end ways
in sleave G for adjustment. In flange K on shank D is inserted two spindles for
rollers F. F. On one of the rollers there is a flange against which the back of the
saw E presses for taking thrust of cut while at work. Then by turning shank D
round in sleave G. the two rollers F. F. come in contact with sides of saw E. and
make it an accurate fit, and if by working it gets a little slack they can be adgusted
to a fit in a moment by twisting rollers and shank D a little more, these rollers
have anti fricton ball bearings or without as prefered as shown in other figures.
Instead of having set screws to these sleaves if by preferance you can split part
of one side of the sleave put flanges on and screw tight same.
Fig. 4 is section of flanged roller showing on same centre as shank D also
showing arrangement of anti friction ball bearings.
Fig. 10 is also section of flanged roller showing arrangemt of three rows of
anti friction balls.
Fig. 8 is also section of rollers showing two rows of anti friction balls & slott B
for adgusting.
Fig. 5 is a front view of Fig. 3 it shows castings A on frame H with shank B and
section of sleave C with sleave G bolted on to long side of sleave C by bolts I. I.
Shank with rollers are withdrawn and shown in Fig. 6 with piece of saw E. between
the rollers and the two wheels F. F. verticle if you twist shank D in the direction
the arrows point one roller will rise and the other fall until they come in contact
with flat side of saw E and there they will be a fit this is very easily done.
Fig. 7 is view of guide for narrow saws.
Fig. 9 is view of guide arrangement so that the rollers are held in the circle
arround centre of saw E so to enable them to be moved while working.
Fig. 11 shows the roller guides for ordinary horizontals with no flanges on rollers
and with shank D in centre.
Fig. 12 is also view of guide without flanges for ordinary horizontal with one
roller on the same centre as shank D so when you adjust guides to fit saw E one
roller preferablye the lower one does not rise or fall but the other roller moves up
or down as required to fit saw E. It also can be arranged in various ways so that
one roller can be moved independant of the other on shank D for adjusting
rollers to fit suw E. Fig. 12 shows same roller. F. 1. can be moved on shank D
to position required and fixed with set screw &c. a saw E being taper narrowest at
each end when it moves endways it cuts from centre outwards and advances while
the other end recedes this is caused by the taper bearing on flanges of guide
rollers.
WILLIAM HENDERSON.