IMPROVEMENTS IN SEWING MACHINES WITH ROTARY SPOOL HOOK FOR PROTECTING SPOOL HOOK AND BOBBIN FROM DAMAGE, AND FOR PREVENTING BREAKAGE OF THREAD AND NEEDLE
Year: 1869

page_text: LETTERS PATENT to Peter Jensen, of No. 2, Chiswell Street, Finsbury
Square, in the County of Middlesex, Consulting Engineer and
Patent Agent, for the Invention of "IMPROVEMENTS IN SEWING MACHINES
WITH ROTARY SPOOL HOOK FOR PROTECTING SPOOL HOOK AND BOBBIN FROM
DAMAGE, AND FOR PREVENTING BREAKAGE OF THREAD AND NEEDLE."-A
communication from abroad by Heinrich Pollack and Albert Edwin
Schmidt, trading under the name of Pollack, Schmidt, and Com-
pany. Hamburg.
PROVISIONAL SPECIFICATION left by the said Peter Jensen at the
Office of the Commissioners of Patents, with his Petition, on the
24th April 1869.
I, PETER JENSEN, of No. 2, Chiswell Street, Finsbury Square, in the
County of Middlesex, Consulting Engineer and Patent Agent, do hereby
declare the nature of the said Invention for "IMPROVEMENTS IN SEWING
MACHINES WITH ROTARY SPOOL HOOK FOR PROTECTING SPOOL HOOK AND BOBBIN

page_text: FROM DAMAGE, AND FOR PREVENTING BREAKAGE OF THREAD AND NEEDLE," to be
as follows:-
The object of this Invention is to prevent the needle in the sewing
machine patented on the 6th of July 1868, No. 2143, and generally in all
sewing machines having the so called Wheeler and Wilson spool hook,
from getting on the wrong side of or catching against the projecting
horn of the spool hook, as shewn on the Drawings illustrating said
Patent.
The nature of this Invention consists in the peculiar construction of
the spool hook for the purposes above named. The Wheeler and
Wilson spool hook is of a shape somewhat similar to a crescent, and the
needle passes close behind it, and is thus to some extent guided by it
during part of its rotary travel; but while the open part between the
two horns of the spool hook passes the needle this latter is not guided
by it as now made.
It will be observed on reference to Figure 1 and Figure 2 of said
Drawings that if the needle be bent intentionally or otherwise (which
may occur through drawing the fabric to be sewn too hard, or when
Bewing a thick seam), and as the needle goes through the fabric while
or after passing one horn but before passing the other horn, there is a
danger of the needle catching against the latter, as it here has been
left without a guide. To prevent this evil that part of the inner cir
cumference of the spool hook which guides the lower part of the
needle just before the latter approaches the next following projecting
horn of the spool hook is extended or prolonged so as to afford the
desired guide for the needle, and prevent its catching against the spool
hook or scratching the bobbin or reel.
SPECIFICATION in pursuance of the conditions. of the Letters Patent,
filed by the said Peter Jensen in the Great Seal Patent Office on
the 23rd October 1869.
3
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, PETER
JENSEN, of No. 2, Chiswell Street, Finsbury Square, in the County, of
Middlesex, Consulting. Engineer, and Patent Agent, send greeting.

page_text: WHEREAS Her most Excellent Majesty Queen Victoria, by Her
Letters Patent, bearing date the Twenty-fourth day of April, in the
year of our Lord One thousand eight hundred and sixty-nine, in the
thirty-second year of Her reign, did, for Herself, Her heirs and succes-
sors, give and grant unto me, the said Peter Jensen, Her special licence
that I, the said Peter Jensen, my executors, administrators, and assigns,
or such others as I, the said Peter Jensen, my executors, administrators,
and assigns, should at any time agree with, and no others, from time to
time and at all times thereafter during the term therein expressed, should
and lawfully might make, use, exercise, and vend, within the United
Kingdom of Great Britain and Ireland, the Channel Islands, and Isle of
Man, an Invention for "IMPROVEMENTS IN SEWING MACHINES WITH ROTARY
SPOOL HOOK FOR PROTECTING SPOOL HOOK AND BOBBIN FROM DAMAGE, AND FOR
PREVENTING BREAKAGE OF THREAD AND NEEDLE," a communication to me from
abroad by Heinrich Pollack and Albert Edwin Schmidt, trading under
the name of Pollack, Schmidt, and Company, Hamburg, upon the con-
dition (amongst others) that I, the said Peter Jensen, my executors or
administrators, by an instrument in writing under my, or their, or one
of their hands and seals, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to bo
performed, and cause the same to be filed in the Great Seal Patent
Office within six calendar months next and immediately after the date
of the said Letters Patent.
NOW KNOW YE, that I, the said Peter Jensen, do hereby declare
the nature of the said 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 this Invention is to prevent the needle in the sewing
machine patented on the Sixth of July One thousand eight hundred and
sixty-eight, No. 2143, and generally in all sewing machines having the
Wheeler and Wilson spool look, from getting on the wrong side of or
catching against the projecting horn of the spool hook, or against the
bobbin in the same, as shewn on the Drawing illustrating said Patent.
The nature of this Invention consists in the peculiar construction of
the spool hook for the purposes above named. The Wheeler and Wilson
spool hook is of a shape similar to a crescent, and the needle passes close

page_text: behind it, and is then to some extent guided by it during part of its
rotary travel; but while the open part between the two horns of the
spool hook passes the needle the latter is not guided by it as now made.
It will be observed on reference to Figure 1 and Figure 2 of said
Drawings that if the needle be bent intentionally or otherwise (which
may occur through drawing the fabric to be sewn too hard, or when
sewing a thick seam), and as the needle goes through the fabric while or
after passing one horn but before passing the other horn, there is a danger
of the needle catching against the latter, as it here has been left without
a guide for some part of the travel of the spool hook. To prevent this
evil that part of the inner circumference of the spool hook which guides
the lower part of the needle just before the latter approaches the next
following projecting horn of the spool hook is extended or prolonged
so as to afford the desired guide for the needle, and prevent its catching
against the spool hook or scratching the bobbin or spool.
On referring to the Drawing it will be found that Figures 1 and 1ª
represent the new hook in end and side elevation; Figure 2, the same in
plan; while Figures 3, 3ª, and 4 represent the spool hook as now made in
respectively end elevation, side elevation, and plan. The part m, Figure 1,
protects the needle o until the point n of the spool hook has passed
beyond it, thus preventing the hook from ever getting behind or striking
against the needle if the fabric to be sewn be pulled forward, and as a
natural consequence preventing the needle or thread from breaking or
the spool from being damaged. On referring to Figures 3 and 4 it will
be observed that the needle with the ordinary spool hook is unprotected
during part of the travel, the needle entering the seam before arriving
at and being guided by the part n. If the fabric when sewing thick
scams be pulled, damage to thread, needle, and bobbin will often ensue
from the reason stated; besides, it often happens that the needle is
bent intentionally or otherwise, and from that cause and in otherwise
well finished sewing machines the same get out of working order, and
have to be sent to the manufacturer for repolishing hook and spool,
whereby both time and money are lost. These evils are as will be
observed done away with by this present Invention.
After having thus described the nature of this Invention I wish it
to be understood that what I claim as the Invention is, the construction
of the spool hook in the machines referred to for the purposes stated

page_text: modification of the same.
In witness whereof, I, the said Peter Jensen, have hereunto set
my hand and seal, this Twenty-third day of October, in the year
of our Lord One thousand eight hundred and sixty-nine.