Year: 1887

page_text: I, HERBERT HENRY LEECH LEWIS trading as Lowis and Lewis of Cambridge
Works, Cambridge Heath Road, in the county of Middlesex, Engineer, do hereby
declare the nature of iny invention to be as follows:-
"
In carrying my invention into effect, I employ a main column or standard within
which, according to one arrangement, a plunger or pillar is mounted and guided
with capability of vertical movement but which is prevented from turning by means
of a wedge-shaped or other suitable key. Upon the top of the plunger the saw table
is firmly secured in such manner that it rises and falls with it.
The required vertical movements are imparted to the plunger or pillar by means
of a screw working in a nut carried thereby and having mounted thereon a bevel
wheel into which takes a bevel wheel carried by a short horizontal shaft to which
motion is given by means of a hand wheel upon the end thereof.
A horizontal bracket having a boss formed thereon which carries the saw spindle
is firmly screwed on to the top of the column or standard and an extension of this
bracket, the extremity of which extension is in line with the centre or axis of the saw
spindle, carries one of a pair of quadrants forming part of the feed apparatus whilst
the end of the saw spindle boss carries the other.
When the saw table is not required to rise and fall the plunger or pillar and its
connected parts may be dispensed with and the saw table may be fixed directly upon
the top of the main column or standard the saw spindle and quadrants being carried
by suitable lugs or bosses formed on or attached to the standard or saw table.
The saw and saw spindle are of the usual description.
The saw table is fitted with the usual "finger plate" and at the feeding end thereof
t is provided with a wood roller which is mounted in brackets with capability of
emoval when desired.
Across the saw table on its underside and near the feeding end thereof are arranged
everal lugs or bosses which are bored and form bearings to carry the lower fence
pindle and one or more of these bearings is or are provided with a set screw whereby
he lower fence spindle may be fixed in any desired position. The fence is attached
o an upper spindle and the upper and lower spindles are connected together by a
Price 8d1

page_text: ink through which they pass such link being accurately bored so that each spinare
shall be capable of sliding freely therethrough.
The link is split at each end and is fitted with a screw or other suitable means may
be employed whereby it may be fixed upon the spindles in any required position
thus allowing the fence to be set at any distance from the saw within certain 5
limits.
Motion is given to the saw spindle by means of a fly wheel which is keyed thereon
and driven by a crank handle or treadle.
The feeding apparatus which is self acting consists of two side quadrants connected
together below the table by a cross-bar; one of these quadrants is fitted on the saw 1
spindle boss or bearing of the saw spindle bracket and the other is fitted on a stud or
bolt carried by the extension of the saw spindle bracket when the table is arranged to
rise and fall but one or both of such quadrants may be carried by a projection or
projections, or bracket or brackets formed on or attached to the table or standard
when a fixed table is employed, the axis of motion of each quadrant being concentric
with the axis of the saw spindle.
In the cross-bar connecting these two quadrants is formed a slot and a quadrant-
bar, curved to the same radius as the quadrants, passes through such slot and is
attached at one end to a convenient part of the machine, a tightening or binding
screw being employed to fix the connecting. bar and quadrants at any desired position
upon the quadrant bar.
To each quadrant a bearing is firmly but adjustably secured by means of screws
or bolts passing into or through holes formed in the quadrants several of such holes
being formed in the quadrants so that the position of the bearings may be adjusted
nearer to or farther from the centre or axis of the saw spindle according to the
diameter of saw in use. A feed shaft or spindle extending across the saw table is
mounted with capability of revolving in these bearings and on this shaft or spindle
and directly in line with the saw is fitted a small star feed wheel which revolves in
contact with timber being cut. By means of this arrangement the two bearings may
be unscrewed from the quadrants and tho feed spindle or shaft together with its
connected parts removed from the machine, leaving the quadrants free to drop holow
the saw table and thus leave the upper surface thereof clear for cross cutting and other
purposes.
Outside one of the quadrants and attached to this feed shaft or spindle is a
differential gear which is constructed as follows:-A pinion is keyed to the feed
shaft or spindle and in connection with this pinion works an internally toothed wheel
or drum. This internally toothed wheel or drum is mounted upon an eccentric
formed on or carried by the cone driving pulley but it is prevented from revolving
by means of suitable guides preferably in the form of a cross on two arms of which it
slides in one direction while the cross slides in the other direction between two lugs
or guides formed on the bearing which carries the shaft or spindle.
The eccentric and the cone driving pulley revolve loosely on the feed shaft or
spindle and are held in position by a retaining collar on the end thereof.
A corresponding cone pulley is keyed on the saw spindle and a band couples the
two this band may work either open or crossed according to the direction in which
the saw is required to revolve while the timber is being fed to it.
By the employment of the differential gear above described in order to give the
required speed to the star feed wheel I obviate the necessity for the use of the
cumbersome and costly train of toothed wheels hitherto employed for that purpose.
DL 5h dan of February 1887
H. H. L. LEWIS.
By Harris & Mills,
23, Southampton Buildings,
Agents.

page_text: COMPLETE SPECIFICATION.
Improvements in Hand or Foot Power Saw Benches.
I, HERBERT HENRY LEECH LEWIS trading as Lewis and Lewis of Cambridge
Works, Cambridge Heath Road, in the County of Middlesex, Engineer, 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,
reference being had to the accompanying drawings and to the figures and letters
marked thereon :-
Figure represents a side elevation partly in section and Figure 2 a plan of a
hand power saw bench constructed according to my invention and Figures 3 to 8
show various details thereof.
In carrying my invention into effect I employ a main column or standard a within
which, according to one arrangement, a plunger or pillar is mounted and guided.
with capability of vertical movement. Upon the top of the plunger the saw table c
is firmly secured in such manner that it rises and falls with it."
The required vertical movements are imparted to the plunger 6 by means of a
screw d working in a nut & carried thereby, or formed in the lower end thereof, the
said screw d has mounted thereon a bevel wheel d¹ into which takes a bevel wheel e¹
carried by a short horizontal shaft e to which motion is given by means of a hand
wheel e², upon the end thereof.
A horizontal bracket having a boss" formed thereon which carries the saw
spindle is firmly screwed on to the top of the column or standard a and an
extension of this bracket f, the extremity of which extension is in line with the
centre or axis of the saw spindle g carries one of a pair of quadrants / forming part
of the feed apparatus whilst the outer end of the saw spindle boss "carries the.
other.
The extension 2 of the bracket is at its extremity formed separate from the.
bracket and is bolted thereto after the saw spindle has been passed into the boss f
in the course of erecting the machine.
A hole is bored in a convenient position in this bracket, in which hole a short
plunger works, this plunger is secured to the underside of the table c and thus
prevents the table from turning but allows it to rise and fall.
When the saw table c is not required to rise and fall the plunger or pillar b and
its connected parts may be dispensed with and the saw table c may be fixed directly
upon the top of the main coluinn or standard a the saw spindle g and quadrants /
being carried by suitable lugs or bosses formed on or attached to the standard a or
saw table c.
The saw g and saw spindle g are of the usual description.
The saw table.c is fitted with the usual finger plate and at the feeding end thereof

page_text: it is provided with a wood roller which is mounted in brackets c with capability of
removal when desired.
Across the saw table on its underside and near the feeding end thereof are
arranged several lugs or bosses which are bored and form bearings to carry the
lower fence spindle and one or more of these bearings 3 is or are provided with a
set screw whereby the lower fence spindle k may be fixed in any desired position.
The fence is attached to an upper spindle mand the upper and lower spindles are
connected together by a link through which they pass, such link being accurately
bored so that each spindle shall be capable of sliding freely therethrough.
The link is split at each end and is fitted with a screw or other suitable means
may be employed whereby it may be fixed upon the spindles in any required position
thus allowing the fence to be set at any distance from the saw within certain limits.
Motion is given to the saw spindle g by means of a fly wheel g" which is keyed
thereon and driven by a crank handle g or it may be by a treadle as will be well
understood.
The feed apparatus which is self-acting consists of two side quadrants / connected
together below the table c by a cross bar h¹; one of these quadrants his fitted on the
saw spindle boss or bearing of the saw spindle bracket and the other is fitted on
a stud or bolt carried by the extension 2 of the saw spindle bracket when the
table e is arranged to rise and fall but one or both of such quadrants may be carried
by a projection or projections, or bracket or brackets formed on or attached to the
table or standard a when a fixed table is employed, the axis of motion of each
quadranth being concentric with the axis of the saw spindle g.
h
In the cross bar connecting these two quadrants is formed a slot and a
quadrant bar o curved to the same radius as the quadrants passes through such slot
and is attached at one end to a convenient part of the machine, a tightening or
binding screw 2 being employed to fix the connecting bar and quadrants at any
desired position upon the quadrant bar o.
To each quadrant a bearing is firmly but adjustably secured by means of
screws or bolts passing into or through holes formed in the quadrants several of
such holes being formed in the quadrants so that the position of the bearings h³ may
be adjusted nearer to or farther from the centre or axis of the saw spindle g according
to the diameter of saw in use. A feed shaft or spindle extending across the saw
table c is mounted with capability of revolving in these bearings and on this shaft or
spindle and directly in line with the saw is fitted a small star feed wheel p¹ which
revolves in contact with timber being cut. By means of this arrangement the two
bearings may be unscrewed from the quadrants h and the feed spindle or shaft p
together with its connected parts removed from the machine leaving the quadrants h
free to drop below the saw table and thus leave the upper surface thereof clear for
cross cutting and other purposes.
Outside one of the quadrants and attached to this feed shaft or spindle p is a
differential gear which is constructed as follows. A pinion p² is keyed to the feed
shaft or spindle p and in connection with this pinion pworks an internally toothed
wheel or drum 7. This internally toothed wheel or drum, is mounted upon an
excentric formed on or carried by the cone driving pulley but it is prevented
from revolving by means of suitable guides s, s¹ preferably in the form of a cross on
two arms s of which it slides in one direction while the arms s¹ of the cross, slide in
the other direction between two lugs or guides formed on the bearing ³ which carries
the shaft or spindle p.
7"
The eccentric and the cone driving pulley revolve loosely on the feed shaft or
spindle p and are held in position by a retaining collar p³ on the end thereof.
A corresponding cone pulley is keyed on the saw spindle and a band couples the
two this band may work either open or crossed according to the direction in which
the saw g is required to revolve while the timber is being feed to it.
By the employment of the differential gear above described in order to give the
required speed to the star feed wheel p¹ I obviate the necessity for the use of the
cumbersome and costly train of toothed wheels hitherto employed for that purpose.

page_text: 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. The improved construction, arrangement and combination of parts forming a
hand or foot power saw bench substantially as herein shown and described.
2. The peculiar construction and arrangement of the feed gear of hand or foot
power saw benches substantially as herein shown and described and for the purpose
stated.
3. The peculiar construction and arrangement of parts for facilitating the raising
and lowering of the saw table substantially as herein shown and described.
Dated this 14th day of November 1887.
HER. HEN. LEECH LEWIS.
By Harris & Mills,
23, Southampton Buildings,
Agents.