Improvement in Sewing Machines Page: 4 of 6
2 sheets, [4] p. : ill. ; 23 cm.View a full description of this patent.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
3,776
india-rubber round plates of larger diameter
than the metallic plate may be arranged with
their centers on said box between the metallic
plates and permanently secured by the screwed
nut.
The friction-wheel B'clutches with a ratchet-
clutch, B", connected to the crank-shaft B', so
as to impart rotary motion to it, but capable
of sliding on it to and from the wheel, and pro-
vided with a spring, B12, to keep it up against
the clutch on the wheel. This arrangement is
provided, so that if the driving-wheel is turned
the wrong way the clutches will slip and will
not turn the crank-shaft.
I " is a balance-wheel on crank-shaft B', and
I,'4 a friction brake-lever, pivoted at B1, and
provided with a rod, B11, rising up to the un-
der side of the table-plate, through which a
finger-stud, B1", with a socket in the bottom for
the reception of the upper end of the rod B1",
works, so that the operator may bring the
brake into contact with the wheel by pressing
down thereon.
The finger-stud B11 rests on but is not con-
nected positively with the rod Bt, in order that
the table-plate, which is hinged on one side,
may be raised when required.
Thle brace B1" and sleeve B" are provided for
holding the table-plate when raised. The brace
is pivoted at the upper end to the under side
of the table and at the lower to one side with-
in the table-frame and jointed in the middle.
The lower part of the brace has a slight curve,
to allow the two parts to lie together when the
table is down, and the upper part of the lower
brace, above the pivoted point of connection
with the upper brace, is beveled, so that as the
table is raised and the brace straightened the
curved part will raise the sleeve, to afterward
drop down and hold the braces together when
in line.
The crank-shaft B'1 is movable on adjustable
points in the ends held by set-screws in the
brackets B' and F', and has two inside cranks,
C and D1, which are connected to the other
parts by two connecting-rods, C' and D'. Each
rod is composed of two pieces, constructed as
shown in Figs. 6 and 9, held together by one
screw and adjustable so as to compensate for
wear.
The crank C is connected by the rod C' with
a pin oran oscillating plate, C3' fixed to a shaft,
C, and oscillating on pointed adjustable bear-
ings held by set-screws in a support screwed
to the under side of the table. Said plate has
also a globular headed wrist-pin, to connect
with a connecting-rod, C1, on one side, to pre-
vent twists on the bearings, and thereby re-
duce friction.
The connecting-rod C' is formed,like the rod
A', to fit the ball-shaped parts of the oscillat-
ing plate C' and needle-arm 0C. This arm has
a fixed axis, resting on points in the plates at
each side of the needle-arm support.
In Fig. 10 are shown double springs, below
C7, under the needle-arm, by which said arm is
arrested at the ends of each movement.CO represents the vibrating thread-tension
spring, pivoted to the needle-arm support at
Oo, and connected to the needle-arm by a link.
The springs C and C1 in Fig. 1 has the same
effect as the double sprin gs C have in Fig. 10;
but by the former the link C must have ajoint,
which in the latter case is unnecessary.
The shuttle-carrier I) has at its lower end a
journal, D', which rests and oscillates on ad-
justable bearing-points held by set-screws in
brackets. The shuttle is carried between the
forked springs D, at the upper end of the arm
D, and the arm is curved so thatit may be ar-
ranged in a perpendicular direction tothe crank-
shaft B' and the needle-arm suppoi t to pro-
vido room for the feeding mechanism.
D4 is the shuttle in its spring-forks D1 of the
curved arm D.
The face of the plate D" is provided with a
vertical groove for the needle, so that the loops
from the needle project out of the said recess
beyond the point of the shuttle.
The tension device for the shuttle-thread is
a spring,D ', bearing on one end,D', of the bob-
bin, and is adjusted by a set-screw, D10, pass-
ing through the upper side of the shuttle, and
guarded, so as not to catch the thread, by
curved wire guard 1)". This screw may be
reached for adjusting it, by a screw - driver,
through a slot of the table covered by a slide,
E is a feed shoe, the upper face of which is
plainly seen in Fig. G. It is the upper end of a
vertical bar, E', supported on its carrier E2, so
as to slide up or down thereon. It is slotted
at E3, and slides on a pin, E', of thie carrier E2,
and has a pin near its lower end and that rests
in an eye on the upper leaf of a double spring.
', pivoted at EB to the carrier E", and ar-
ranged so that it bears the lower leaf on canm
E on crank-shaft B'. In the end of the upper
leaf of said spring E' is an adjusting-screw, E8,
with its lower eud bearing on the end of the
lower leaf,for raising the upper with the ver-
tical bar E' on it more or less to adjust the
height of the feed-shoe, and the lower leaf is
provided with two holes, in which a leather
strip is arranged, so as to bear on cam ]i, and
so that it may easily be renewed.
The carrier Et' is particularly curved, that it
may be out of reach of cam EB or crank-shalt
B3, and also be used as a support for the pivot
E of spring E', and is joined at the lower end
with a curved arm, F, pivoted on shaft D',
projecting at equal distances from said sha ft,
and provided with notches in the ends. In
front of this carrier is an inverted-V-shaped
frame, FP, pivoted at F: to a vertically-sliding
bar, 0F, working up and down on the bracket
F'. The pivot- pin, at F', is fixed in bar FI and
projecting from the front side of the bar near
its bottom, and working in and through a
slot in the bracket is a pin, F.
The bar F4 is provided with a piece of
leather to bear on cain .7, also on shaft B1,
which throws simultaneously with the cam E7.
The lower ends of the arms F' are connected
Upcoming Pages
Here’s what’s next.
Search Inside
This patent can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Patent.
Cleaver, P. J. Improvement in Sewing Machines, patent, November 16, 1869; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth165340/m1/4/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.