An Improved Feed and Presser Mechanism for Sewing Machines.
Year: 1892

page_text: Date of Application, 3rd Oct., 1892-Accepted, 5th Nov., 1892
COMPLETE SPECIFICATION.
An Improved Feed and Presser Mechanism for Sewing Machines.
I, CHRISTEN REES BONNE of 57 Chancery Lane London W.C. Patent Agent
(communicated to me by Georg Meischner of the Town of Freiburg in the Grand
Duchy of Baden 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:-
The object of my invention is to enable the operator of a sewing machine when
sewing together two pieces of material differing in length (as is the case in putting
in sleeves or sewing on frills or gathers or the like) to distribute the stuff equally
without previous gathering or tacking. The apparatus according to my invention
by which this is accomplished may be fixed to any existing type of sewing machine.
It is essentially a top feed adjustable in such a manner as to cause the upper
material to travel independently of the under material (which is pushed forward by
the ordinary feed) either at the same or at a different rate of speed, the adjustment
being easily accomplished while the machine is running.
My improved feed and presser mechanism consists essentially in the following
arrangement, reference being had to the accompanying drawing, of which
Fig. 1. is a front view, Fig. 2 a side view, Fig. 3 a plan and Figs. 4 and 5, detail
views.
On stuff presser c on presser bar k is fixed the vertically adjustable slide b with
feed wheel r and ratchet wheel o on same axle. The action (revolution) of
ratchet wheel o is caused (regulated) by pawl d actuated by lever / the upper
extremity of which is bent obliquely so that the correspondingly shaped needle
bar i in its upward movement will strike against the oblique surface of and cause
the feed wheel r to revolve.
The revolution of r is regulated by eccentric which is provided with four
surfaces differing in height. Lever his provided with an arm g and rests against
spring f. According to the height of the surface of eccentric a against which arm g
rests the motion of lever his increased or diminished and accordingly the ratchet
wheel o is caused to revolve by 1, 2 or 3 teeth at a time or it may remain at rest-
the needle bar not striking at all.
According to the motion of ratchet wheel o the upper material is caused to travel
by means of the feed wheel r.
Feed wheel is adjustable vertically for different thicknesses of material by
means of eccentric lever N on presser foot c resting against pins on slide b. This
lever p is provided with six slots or hollows of different depths and serves to adjust
slide on presser bar c. Slide is pressed upward by spiral spring so that
after each motion of lever h pins is pressed into one of the hollows of eccentric
lever
p.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is:
A presser mechanism for sewing machines acting as top feed, means for regulating
(increasing or diminishing) motion of said feed consisting of eccentric . lever h
pawl d and ratchet wheel o and means for regulating depth of grip of said feed
consisting in the vertical adjusting device formed by eccentric p and pin s substan-
tially as described and shewn in the accompanying drawing.
Dated this 26th of Sentember 1899