Improvements in and relating to Sole-sewing Machines.
Year: 1889

page_text: Date of Application, 11th Oct., 1889-Accepted, 11th Oct., 1890
COMPLETE SPECIFICATION.
Communicated from abroad by MICHEL FREDERIC FOURMENTIN, Junior, of
No. 41, Rue Lepic, Paris, France, Engineer.]
Improvements in and relating to Sole-sewing Machines.
1, HENRY ALFRED OLDERSHAW of No. 38 High Cross Street Leicester in the County
of Leicester Engineer and Machinist, 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 improvements in and relating to sole sewing
machines used in the manufacture of boots and shoes for sewing in the channels or
grooves of the soles, to secure the soles to the upper leathers. The principal part of
this invention consists of the hereinafter mentioned contrivances for maintaining the
foot and needle point at a convenient height to suit the varying thicknesses of sole, so
that all thicknesses of soles can be sewn without altering or interfering with the gear
of the machine.
The machine does not require cams but receives its motion from one eccentric lever
thus ensuring a smooth action and a greater speed than can be attained in other
machines which of necessity employ cams.
That this invention may be well understood I will refer to the drawings accom-
panying this specification.
Figure 1 is a side view in elevation of the machine.
Figure 2. a rear view of same.
Figure 3. is a section of the machine passing through the axis of the motive shaft.
Figure 4. is a front view of the rack arrangement by which the presser bar is auto-
matically raised or lowered according to the thickness of work to be sewn.
Figure 5. is a side view of same.
Figure 6. is a view of the horizontal rack bar and its assessories for giving the
whirl in the horn 8, a circular motion to enable the thread to be looped on the needle.
'Figure 7. is a sectional view of the crank disc 9, vertical shaft and rack bar shown
in Figures 1, 2, 3 and 6.
The object of this invention is to provide or construct a sole sewing machine in a
simple way that good sewing can be done without the aid of cams and the like for
vertically reciprocating the needle bar, all the parts being operated from the main
shaft.
In the upper part of the frame A, is mounted the short horizontal shaft 1, upon
the end of which is the balanced grooved wheel 2, carrying the driving belt 3,
which is passed over the second grooved wheel 4, mounted on the short shaft 5,
upon which are the fast and loose pulleys 6 and 7, carried in suitable bearings,
that the machine may be driven by power, or by the foot treadle shown in dotted
line Figures 1 and 2 which can be used if it is desired to operate the machine without
power.
The internal contrivances in the horn 8, consisting of a whirl actuated by spur
bevel gearing see dotted line Fig. 2 is operated by securing at the lower end of the
vertical shaft 11, the crank disc 9, to which is secured the rack bar 10, by the pin b,
the outer end of the rack gearing with the pinion a, and held thereto in the rocking
guide a', by the rollers a³, the pinion a, being fitted on the lower end of the
vertical shaft a², the upper end of which gears with an inclined shaft in the horn 8,
see Figure 2," but which is of the ordinary character. The vertical shaft 11,
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page_text: receives its motion by a mitre wheel 11, gearing with a second one on the motive
shaft 1. The horn 8, is heated through the pipe 8, the reel 8b, carrying the
sewing thread which passes under the roller 8c, in the ordinary way.
Motion is imparted to the machine from the shaft 1, upon which is fitted the
eccentric 12, to the strap of which is attached the rod 13, its upper end being
connected to the outer end of the beam 14, upon the said rod is secured the bracket 15,
carrying at its free end the tappet screw 25, which comes in contact with the stud 16,
on end of a lever secured to the end of the feed shaft 37. Another bracket 18,
carries the tappet screw 24, which is also secured upon the rod 13, and comes in
contact with the block 18ª, on end of the pivoted lever 19, the other end of which
is connected by the link 32, to the block 34", "see Figure 4." When the rod 13, is
lifted the spring 15ª, on the rod 15b, brings the lever 19 into its former position
ready to he acted upon again by the tappet 24, hereinafter specified.
The movement of the needle bar 23, is regulated according to the thickness of work
sewn by the fulcrum har 22, sliding vertically in the plates 22, and carrying the
fulcrum stop or tappet 20 with it, the fulcrum bar 22, rests on a lever 20ª, coming
upon a projection on the foot bar 21, which also holds the feed point 26 down as shown
in Figure 4, while taking the work along. The sway beam 14, is centrally pivoted on
the fulcrum bar 22, and is connected to the link 23, attached to the needle bar 23
see Figure 4," and by the revolution of the shaft 1, the vertical reciprocation to the
needle bar is effected.
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The feed point 26, slides vertically in the slot 26ª, in the foot bar 21, and is moved
horizontally by aid of the link 27, and pulled back by the fork 28, to which is attached
the spring 29" see Figures 2 and 4, to take the work along. While the point is taking
the work along the block 34", carrying the latch 34 is raised by the lever 19, actuated
upon by the tappet 24, striking the block 18%, thus when the said latch is in gear with
the rack teeth 3, the foot bar 21 is raised. The latch holder 38, is fitted in the
block 34, and actuated by the tie 35, upon the outer end of which is the wing nut 38ª,
to regulate the movement of the latch 34, the tie 35 deriving its movement from the
vertical lever 36 on the feed rock shaft 37, and is kept in position by the coiled
spring 39.
To enable the work to be placed upon the horn 8, the latch is released from the teeth
of the rack 33ª, by the hand lever 30; to which is attached the lever 40, the inner
end of the lever coming against the collar 32, on the foot bar 21, the spring 31,
bringing the hand lever back again, the coiled spring 21°, "see Figures 4 and 5," on.
the foot bar 21, puts pressure upon the said bar and keeps it to its work.
The presser point 33, is adjusted by means of the nut 32b, in the ordinary way.
A number of the rack teeth 33ª, is put in the foot bar 21, to allow the bar to be
lifted or let down in the manner described to admit of any thickness of work to be
sewn.
By this invention boots or shoes are effectively sewn in the channel or groove
irrespective of the varying thickness of the soles to be sewn without the use of cams
employed in sole sewing machines now in use. I would have it understood that
the contrivances herein shown and described may be applied to existing machines so I
do not confine myself to the precise form or matter in detail for they may vary without
departing from my invention.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
1. In a sole sewing machine the means of raising the foot at the time of feeding
the work along according to the thickness of work to be sewn by the rack 33ª, and
latch 34, operated from the feed bar 37.
d
2. In a sole sewing machine actuating the feed point 26, by a tappet or its
equivalent in the manner herein before described.

page_text: 3. In a sole sewing machine the employment of the automatic foot lifting devices
actuated by a tappet or its equivalent substantially in the manner and for the purpose
herein before described and set forth.
Dated this 7th day of October 1889.
WILLIAM BESTWICK MAXFIELD,
Authorized Patent Agent,
The Central Patent Office, Bowling Green Street, Leicester,
Agent for the Applicant.