Year: 1886

page_text: Date of Application, 10th Aug., 1836.
Complete Left, 10th May, 1887.
Complete Accepted, 10th June, 1887.
We, FRANK HOWARD BENNETT, of Adelaide Road, Teddington in the County of
Middlesex Civil Engineer, and JAMES DOWLING of 35 Jewin Street in the City of
London, Mechanical Engineer do hereby declare the nature of this invention to be as
follows:-
The work is carried on a table to which two sets of horizontal reciprocating motions
are given. The first is a slow longitudinal movement by which the fabric is carried in
one direction whilst one side of the button-hole is being stitched and is brought back
again whilst the other side is being stitched. This motion is given by means of a cam
projection on the table which takes into a groove in a cam wheel carried by a cam
shaft. The other reciprocating motion is quicker than the first and is at right angles
to it, this is for making the stitches and is given in the following way :-
Beneath the table there is a lever pivotted at one end to the frame of the machine
whilst its other end takes into an 8-shaped cam groove in a cam wheel on the main
shaft so that the lever is swung to and fro through a fixed angle at each revolution of
the shaft. The table is pivotted to one end of a second lever, parallel to the cam
lever, and whose other end is pivotted to the same centre. These two parallel levers
are connected together by means of a sliding bolt carried by the cam lever and
embraced by a fork on the second lever.
The sliding bolt has two recesses sunk in it at its central part where it is embraced
by the fork. These recesses are on opposite sides of the bolt and one in advance of
the other. The width of the opening in the fork is greater than that of the sliding
bolt where its size is reduced by either of the recesses, so that when the fork is
opposite a recess the cam lever, during part of its stroke moves independently of the
lever on the table, the dimensions of the parts being so arranged that the latter only
swings through about half as great an angle as the cam lever. The sliding bolt is
actuated from a groove in a cam wheel fixed to the shaft which carries the cam for
giving the longitudinal motion to the table. Whilst one side of the button-hole is
being stitched the position of the sliding bolt remains unaltered and the lever fixed to
the table is swung through only about half the angle of the cam lever. When the
stitching has reached the end of the button-hole the sliding bolt is moved by its cam

page_text: and assumes a position such that the fork cannot enter either recess. The two levers
are thus rigidly fixed together and now swing through the same angle, so that the
table is reciprocated through about twice as great a distance as before. In this way
the long stitches forming the bar at the end of the button-hole are made. During
this time the sliding bolt continues to move and after a certain number of long
stitches have been made the other recess comes opposite the fork and the result is that
the two levers are no longer rigidly pinned together and the lever fixed to the table
again only swings through about half as great an angle as the cam lever. As however
the fork is now opposite the recess on the other side of the sliding bolt, the centres of
the present reciprocations of the table form a line parallel to but a certain distance
from the line of the centres of its former reciprocations. In this way the other side
of the button-hole is stitched, the sliding bolt connecting the two levers remaining
stationary during this process. When the second side of the button-hole has been
again commences to move and rigidly pins together the
two swinging levers, and thereby causes the requisite number of long stitches to be
made to form the bar at the other end of the button-hole.
completed the sliding proce
The work is held in position on the table by means of a presser foot carried by an
arm on a tube embracing a pin on the table. The top of the tube is formed with
inclines, and the pin carries at its top a thumb nut correspondingly formed. The tube
rests on a bow spring so that by turning the thumb nut the tube with the presser is
forced down against the spring, and the work is held in an elastic nip.
Dated this 10th day of August 1886
CARPMAEL & Co.,
Agents for the Applicants.

page_text: We, FRANK HOWARD BENNETT, of Adelaide Road, Teddington in the County of
Middlesex, Civil Engineer, and. JAMES DOWLING of 35 Jewin Street in the City of
London Mechanical 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:-
Figure 1 shows a side elevation of a machine constructed according to our invention,
Figure 2 a plan of the same, the other figures show to a larger scale some of the
parts.
The work is carried on a table a to which two sets of horizontal reciprocating
motions are given. The first is a slow longitudinal movement by which the fabric is
carried in one direction whilst one side of the button-hole is being stitched and is
brought back again whilst the other side is being stitched. This motion is given by
means of a cam projection b on the table or preferably as shown at Figures 2 and 11
upon an arm c pivotted at c¹ to the frame of the machine and adjustably connected to
slide a which carries the table by the thumb nut on a bolt passing through slots in
the arm and table. By shifting the point of attachment of the arm to the table the
distance travelled by the latter can be varied. The cam projection b takes into a
groove d in a cam wheel carried by a cam shaft e. This cam shaft e is driven
preferably intermittently in any suitable way. In the machine shown in the drawings
the intermittent motion is given by the cam e fixed to the main shaft which rocks the
bent levere pivotted to the shaft e about which it is free to turn (see Figure 3 which
is a section to a larger scale on the line Figure 2 and Figure 3 a side view).
This levere carries a hook or hooks which is nearly but not quite radial to the
shaft e so that as the lever is rocked by the cam e¹ the hooks e coming against the
edge of the disc et fixed on the shaft e acts as a clutch and gives an intermittent rotary
inotion to the shaft e. Springs are provided as is clearly shown in Figure 3 for
bringing the lever e back so as to be again acted on by the cam e'. The distance
through which the lever and hook are moved and the shaft e turned can be varied by
means of the adjusting screw e. The shafte is also provided with the handle e by
which it can be turned by hand.
The other reciprocating motion given to the table a is quicker than the first and is
at right angles to it, this is for making the stitches and is given in the following
way
Beneath the table a there is a lever pivotted at " to the frame of the machine
whilst a roller on its other end takes into an 8-shaped cam groove g in a cam wheel
on the shaft y driven from the main shaft see Figures 2, 9, 10 and 11 so that the
lever is swung to and fro through a fixed angle at each revolution of the shaft. The
table or preferably a transverse slide in it as shown is pivotted at h¹ to one end of a
second lever h, parallel to the cam lever f, and whose other end is pivotted at "to the
same centre. These two parallel levers are connected together by means of a sliding
bolt (see Figures 7) carried by the cam lever and embraced by a fork k see Figure 8
on the second lever.
The sliding bolt has two recesses sunk in it at its central part where it is

page_text: embraced by the fork. These recesses are on opposite sides of the bolt and one in
advance of the other. The width of the opening in the fork is greater than that of the
sliding bolt where its size is reduced by either of the recesses so that when the fork k
is opposite the recess j¹ sec Figure 8 the cam leverf during part of its stroke, moves
independently of the lever h on the table the dimensions of the parts being so arranged
that the latter only swings through about half as great an angle as the cam lever.
The sliding boltj carries a pin which passes through a slot in the lover f see Figure 9
and at its other end carries a roller which works in a slot in the lever 1, pivotted
to the frame at 11. The other end of this lever carries a roller 1, which works in a
groove in a cam wheel fixed to the shaft e, which carries the cam for giving the
fongitudinal motion to the table see Figure 11. Whilst one side of the button
hole is being stitched the position of the sliding bolt j remains unaltered and the
lever h fixed to the table a is swung through only about half the angle of the cam
lever. When the stitching has reached the end of the button hole the sliding bolt j
is moved by its cam and assumes a position such that the fork k cannot enter either
recess see Figure 8. The two levers and are thus rigidly fixed together and now
swing through the same angle so that the table a is reciprocated through about twice
as great a distance as before.
In this way the long stitches forming the bar at the end of the button hole are
made. During this time the sliding bolt continues to move and after a certain
number of long stitches have been made the other recess comes opposite the
fork k. and the result is that the two levers and are no longer rigidly
pinned together and the lever fixed to the table again only swings through
about half as great an angle as the cam lever f. As however the fork k is now
opposite the recess on the other side of the sliding bolt to that on which the
recess is situated the centres of the present reciprocations of the table form a line
parallel to but a certain distance from the line of the centres of its former
reciprocations.
In this way the other side of the button hole is stitched the sliding bolt j connecting
the two levers f and h remaining stationary during this process. When the second
side of the button hole has been completed the sliding bolt again commences to
nove and rigidly pins together the two swinging levers as shown in Figure 8 and
thereby causes the requisite number of long stitches to be made to form the bar at
the other end of the button hole.
The work is held in position on the table a by means of a presser foot m see
Figures 4. 5 and 6 carried by an arm n on a tube n¹ embracing the pin n³ on the
table. The top of the tube is formed with inclines as shown and the pin carries at its
top a thumb nuto correspondingly formed. The tube rests on a spiral or bow spring
or springs p so that by turning the thumb nut the tube with the pressure is forced
down against the spring, and the work is held in an elastic nip.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed we declare that what we claim is:-
1. The combination of the sliding bolt j and fork k, connecting the table to the
part actuating it whereby the table is reciprocated through a greater distance at the
ends of the stitches than at the sides.
2.. The elastic nip for holding the work substantially as described and shown in
Figures 4. 5 and 6.
3. The improvements in button hole sewing machines substantially as described and
shown in the drawings.
1
1007
CARPMAEL & Co.,
Agents for the Applicants.