IMPROVEMENTS IN SEWING MACHINES
Year: 1872

page_text: LETTERS PATENT to George Haseltine, of the "International Patent
Office," Southampton Buildings, London, Doctor of Laws, for the
Invention of "IMPROVEMENTS IN SEWING MACHINES." -A communi-
cation from abroad by Ozro Morrill, of Stanstead, Quebec, Canada,
Machinist.
Sealed the 21st March 1873, and dated the 18th December 1872.
COMPLETE SPECIFICATION filed by the said George Haseltine at the
Office of the Commissioners of Patents, with his Petition and
Declaration, on the 18th December 1872, pursuant to the 9th
Section of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, GEORGE
HASELTINE, of the "International Patent Office," Southampton Buildings,
London, Doctor of Laws, send greeting.
WHEREAS I am in possession of an Invention for "IMPROVEMENTS
IN SEWING MACHINES," and have petitioned Her Majesty to grant unto
me, my executors, administrators, and assigns, Her Royal Letters

page_text: Patent for the same, and have made solemn Declaration that it has
been communicated to me from abroad by Ozro Morrill, of Stanstead,
Quebec, Canada, Machinist.
NOW KNOW YE, that I, the said George Haseltine, do hereby declare
that the following Complete Specification, under my hand and seal, fully
describes and ascertains the nature of the said Invention, and in what
manner the same is to be performed, in and by the following statement,
reference being had to the accompanying Drawing forming a part of
this Specification :-
The nature of the said Invention consists in the peculiar construction
and arrangement of a circular rotary shuttle formed of two parts; one
part is a hook engaged and revolved by a rotary plate, while the other
part is of hemispherical shape and remains stationary. Within the
latter is a bobbin containing the thread and it can be arranged either
with or without the central support or pin attached to the part of
hemispherical configuration. The tension of the thread is regulated
as it passes from the bobbin by means of holes in the hemispherical
part. It also consists in the peculiar construction, arrangement, and
adaptation of thread adjusting mechanism or devices regulating the
tension and supply of the thread to the needle of the machine
attached to the needle bar and controlled thereby. Also in the appli-
cation to the sector plate of the shuttle on its race edge of an insertion
of raw hide or pyroxyline to receive the race groove of the circular
rotary shuttle. And also in the application to the presser foot of an
insertion of raw hide or pyroxyline provided with a hole for the passage
f the noodle

page_text: r
arm pivoted to the arm D at x, which also represents the screw whose
shaft supports the tension clamp or device g; the latter is composed of
metal and constructed to fit upon the shaft x, its lower end open as
at i, and the clasp of the same upon the shaft x regulated by a set
screw; the forward and upper end of the clamp fits upon the pivot h
attached to the needle bar as shewn in Figure 5; P, represents the spool
holding the thread which passes therefrom up and between the forked
wire soldered to the clamp or tension plate g over the hook s¹, thence
between the slots formed on the end of the clamp or tension plate over
the pivot and thus on to the needle. The upward and downward
movements of the needle bar alternately hold and release the thread
passing over the pivot h, allowing a sufficient quantity of thread to be
supplied for the proper operation of the machine, the downward move-
ment releasing or freeing the thread, and the upward holding it firmly
in place taking up the loop.
The lever e, Figures 1 and 4, is attached to the arm D of the sewing
machine by means of the shaft or pivot d, and is held in position and
regulated by the set screw c. Upon the lower end of said lever a wire
arm is attached, upon the end of which a hook or loop is formed to
receive the thread as it passes to the needle. This lever e works
freely upon its shaft or pivot, the friction occasioned by the set screw
holding it in any desired position. By moving the lever up or down.
the character of the stitch is regulated and determined; the nearer
approach of the lever to a vertical position the tighter or closer will the
stitch become.
The shuttle of this machine is circular and composed of two parts A
and B, the former is a flat plate with the hook formed upon it, as shewn
in Figure 2, it is supplied with holes into which pins engage from the
plate attached to the end of the shaft, as seen in Figure 3. A V shaped
groove is formed upon the periphery of the shuttle, and the same is held
in its proper position by the jointed sector plate c, the edges of which
conform to the shape of such groove and fit into the same; or such
edges may be formed by an insertion of raw hide or pyroxyline as
herein-after described. A groove S is formed upon one side of the
shuttle A as seen in Figure 2 to make the loop. The part B with the
part A forms the shuttle proper, the former is hemispherical in shape
and configuration and fits into the cavity formed by reason of a raised
edge on the plate A, as seen in Figure 3, and fits loosely therein. The

page_text: part B does not revolve with the part A, and in order to aid in its
retention in an upright position a weight I, as seen in Figure 3, may be
soldered to its lower and inner edge. On the upper part of the
portion B of the shuttle holes are made varying in distance from the
circumference, through either of which the thread may pass and by
which the tension of the under thread is regulated. These holes may
be made of different sizes to accommodate themselves to the different
sizes of thread used. To the centre of the part B of the shuttle a
pin may be attached upon which the spool & may be placed and revolve,
as seen in Figure 3; this is not absolutely necessary to be done as the
spool being adapted in form to the space between the parts A and B
will perform all the functions required of it in holding and releasing the
thread upon it when the machine is in motion. To prevent the jarring
of the part B from its position I use an arm m and sensitive spring n
attached to its upper and inner end that very nearly impinges upon the
part B of the shuttle, as seen in Figures 1 and 3. It is not necessary or
even desirable that these parts should touch each other, but space
may be allowed for the thread to pass between the spring and shuttle B.
The arm m is secured to the plate C by the screw o.
The angular edge of the jointed sector plate C may be formed as
before described of metal, but I prefer to groove such edge and insert
therein a strip of raw hide or pyroxyline to conform to the V shaped
groove in the circular rotary shuttle. By the application of this
substance the operation of the shuttle will be smooth, noiseless, and
little liable to wear.
The presser foot F is shown bifurcated to receive an insertion I of
raw hide or pyroxyline provided with a central hole through which to
pass the needle. Pyroxyline from its transparency enables the operator
to view the operation of the needle, and it also prevents injury to the
needle by friction when the machine is running at great speed. By the
above described peculiar construction of the shuttle much less metal is
required than in ordinary shuttles and it can be made very cheaply.
Having thus fully described the said Invention, as communicated to
me by my foreign correspondent, and the manner of performing the
same, I wish it understood that I claim,—
First. The rotary shuttle composed of two parts A and B constructed
and arranged as described, and the latter furnished with holes b, b, b,
through which the thread passes from the bobbin, regulating and

page_text: controlling the tension thereof, in the manner and for the purpose
herein described.
Second. The thread controlling and holding mechanism consisting of
the devices g, r, i, and attached to, connected with, and operated by
the needle bar, in the manner and for the purpose herein specified.
Third. The combination with the elements of the preceding clause
of the lever e, its projecting arm f, and set screw c when arranged upon
the main arm of the sewing machine, as herein specified.
Fourth. The application to the circular edge of the sector plate C of
an insertion of raw hide or pyroxyline to coact with the V groove
of the rotary shuttle, as and for the purpose set forth.
Fifth. The application to the presser foot F of an insertion 7 of raw
hide or pyroxyline, as and for the purpose set forth.
In witness whereof, I, the said George Haseltine, have hereunto
set my hand and scal, this Eighteenth day of December, in the
year of our Lord One thousand eight hundred and seventy-two.
0
Witness,
WM. ROBT. LAKE,
8, Southampton Buildings,
London.
GEORGE HASELTINE. (L.S.)