AN IMPROVEMENT IN SEWING MACHINERY
Year: 1866

page_text: LETTERS PATENT to Nahum Salamon, of Ludgate Hill, in the City of
London, Agent, for the Invention of "AN IMPROVEMENT IN SEWING
MACHINERY "A communication from abroad by Amasa Benis Lowe,
of the City of New York, United States of America.
Sealed the 4th December 1866, and dated the 18th July 1866.
PROVISIONAL SPECIFICATION left by the said Nahum Salamon, at the
Olhice of the Commissioners of Patents, with his Petition, on the
18th July 1866.
I, NAHUM SALAMON, of Ludgate Hill, in the City of London, Agent, do
hereby declare the nature of the said Invention for "AN IMPROVEMENT IN
SEWING MACHINERY," to be as follows -
It is well known to the users of sewing machines that the wheel feed is
specially applicable to certain kinds of work, as the sewing of thick
leather, and that to lighter kinds of work the reciprocating feed is better
suited.
Now the object of this Invention is to enable the wheel feed of sewing machines
to be displaced by a reciprocating feed and replaced at pleasure according to
the work required to be performed by the machine. To attain this result it is

page_text: necessary to adapt the reciprocating feed mechanism to the shafting and fixed
bearings employed in the wheel feed, whereby the interchanging of the two
arrangements may be effected without the assistance of a mechanic. The
fixed bearing which ordinarily carries the stud axle of the feed wheel is fitted
with a radius arm, and to the end of this arm is connected by a coupling pin
a pendent lever This lever is provided with a stud pin which carries a rock
lever The upper limb of this rock lever is formed with a segment-shaped
roughened feed surface, and the lower limb is borne against by an arm pro-
Another
jecting from a collar or sleeve shaft that 1ocks on a fixed fulci um
arm on this same sleeve shaft carries a friction bowle which bears against a
The rotation
cam keyed on the cam shaft below the table of the machine.
therefore of this cam will transmit a reciprocating motion to the segment
feed. The rise and fall of the segment feed is effected by the action of a
second cam on the cam shaft working upon the lower end of the pendent
lever before mentioned and by the connection through a coiled spring of the
segment feed with the radius arm that caries the pendent lever, which spring
assists the return or back motion of the feed. In order to restore the wheel
feed the last-mentioned cam, the radius arm, and the parts connected there-
with, and the sleeve shaft, are removed, and the stud axle of the wheel and the
radius arm for working it are replaced.
SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said Nahum Salamon in the Great Seal Patent Office on the
18th January 1867.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, NAHUM
SALAMON, of Ludgate Hill, in the City of London, Agent, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by llei Letters
Patent, bearing date the Eighteenth day of July, in the year of our
Loid One thousand eight hundred and sixty-six, in the thirtieth year of
Her reign, did, for llerself, Ifer heirs and successors, give and grant unto
me, the said Nahum Salamon, Hei special licence that I, the said Nahum
Salamon, my executors, administrators, and assigns, or such others as 1,
the said Nahum Salamon, 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
Bistan and Ireland, the Channel Islands, and Isle of Man, an Invention.

page_text: for "AN IMPROVEMENT IN SEWING MACHINERY," being a communication from
Amasa Bemis Howe, of the City of New York, United States of Amenca,
upon the condition (amongst others) that I, the said Nahum Salamon, my
executors or administrators, by an instrument in writing under my, or their,
or one of then hands and seals, should particularly describe and ascertain the
nature of the said Invention, and in what manner the same was to be per-
formed, 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 Nahum Salamon, 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 fol-
lowing statement, reference being had to the Drawing hereunto annexed, and
to the letters and figures marked thereon (that is to say).-
It is well known to the users of sewing machines that the wheel feed
15 specially applicable to certain kinds of work, as the sewing of thick
leather, and that to lighter kinds of work the reciprocating feed is better
suited.
Now the object of this Invention is to enable the wheel feed of sewing
machines to be displaced by a reciprocating feed and replaced at pleasure,
according to the work required to be performed by the machine To attai
this result it is necessary to adapt the reciprocating feed mechanis'n to the
shafting and fixed bearings employed in the wheel feed, whereby the
interchanging of the two arrangements may be effected without the assistance
of a mechanic.
In the accompanying Diawings I have shewn two arrangements for attain-
ing the object of the Invention, the feed mechanism being in both cases
supposed to be applied, for the sake of illustration, to what is known in the trade
as a Howe sewing machine
In Sheet I., Fig. 1 shews the ordinary wheel feed which it is desired to
displace by a reciprocating feed and replace at convenience This wheel
feed, as is well known, consists of a wheel with a roughened periphery
1.ounted loosely on a stud axle, which axle is clamped to a slotted bracket A
cast on the under side of the table. The wheel is formed with an annular
flange which is clipped by dogs that are stepped into the boss of a lever that is
free to rock on the stud axle that carries the wheel. The tail of this lever is
held by a spring in contact with a cam B on the end of the driving shaft of
the machine. A short arm of the rock lever is caused by the pressure of the
spring before mentioned to bear against an adjustable stop or sciew Ċ which

page_text: by limiting the amount of vibration of the rock lever determines the amount
of axial motion that shall be given to the feed wheel at each revolution of the
cam B, and thus regulates the length of the stitches produced by the machine.
Now by referring to Figures 2 and 3 (the former of which shews in end
elevation the under part of a Howe machine fitted with a reciprocating feed,
while the latter shews the same part in side elevation) it will be seen that the
slotted bracket A, cam B, and regulating screw C are all utilized, the feed
wheel and its diving apparatus being removed by first slackening a clamping
nut on its stud axle to give place to the reciprocating feed; this feed is shewn
in plan view at Fig 4, and a radius arm which carries it is shewn in side view
at Fig 5, it being secured by a clamping screw to the slotted bracket A which
has been mentioned as carrying the stud axle of the feed wheel. a is the radius
aim, formed with a socket at its extremity to receive the fulcrum pin of a lever b;
this lever is provided with a stud pin which caries a rock lever c: the upper
Hmb of this rock lever is formed with a segment-shaped roughened feed
surface, and the lower limb is held against the cam B by means of a coiled
spung d, which forms an elastic connection between the feeding segment and
the radius-arm, and serves to give the return motion to the feeding segment
while the rotation of the cam B imparts through the tail or lower limb of the
rock lever c the forward motion to the feeding segment. A projection is cast
on the upper limb of the rock lever c to enable the lever to strike against the
adjustable stop C, which determines as in the wheel feed the length of the
stitches formed by the machine. The rise and fall of the feeding segment is
effected by the action of a second came on the cam shaft working upon the
end of the rock lever b, which, as before mentioned, carries the stud pin on
which the rock lever carrying the feeding segment is mounted. In order to
restore the wheel feed the radius arm and the parts connected therewith are
removed, but to enable this to be done the cam B must be first slidden off its
shaft. When the reciprocating feed is removed the cam B is returned to its
former position and made fast on the cam shaft, and the stud axle with the
wheel feed and its driving apparatus are replaced. The second cam
may without detriment remain, as it ceases to act when the rock lever b is
removed.
To obviate the necessity for removing the cam B it may be desirable in some
cases to apply the Invention in the form shewn at Figures 6 and 7, Sheet II.
In this arrangement the feed cani B instead of being mounted on the extremity
of the shaft is set some distance in, as shewn in the plan view Fig 6, and
the lifting came of the first-described arrangement is mounted on the extreme
end of the cam shaft, as shewn best in the elevation Fig. 7. The same

page_text: letters of reference being used in these as in the former Figures to indicate the
hhe parts, it will only be necessary to refer to the additional parts by which the
cam b is enabled to act upon and give the requisite forward motion both to
the reciprocating and the wheel feed. The lower limb of the rock lever c is
borne against by the pendent arm f of a crank lever or frame that rocks on a
fixed fulcrum canied by lugs cast on the under side of the table. Another
arm of the crank lever or fiame carries a stud pin on which is mounted a
friction bowle g; this bowle bears against the cam B before mentioned; tho
rotation therefore of this cam will transmit through the bowle a rocking
motion to the crank lever or frame f, which by its pendent arm pressing upon
the tail of the rock lever c will, with the counteracting force of the spring d,
transmit a reciprocating motion to the segment feed. When however this
feed is replaced by the ordinary wheel feed the crank lever or frame f
will act in a similar manner upon the rock lever that drives round the
wheel through the operation of the clamping dogs, as explained with referenco
to Fig. 1.
Having now set forth the nature of the Invention of "An Improvement
in Sewing Machinery," as communicated to me by my foreign correspondent,
and explained the manner of carrying the same into effect, I wish it to be
understood that under the above in part recited Letters Patent I claim adapting
to wheel-feed sewing machines a reciprocating feed in the manner and for the
purpose above set forth.
In witness whereof, I, the said Nahum Salamon, have hereunto set my
hand and seal, the Eighteenth day of January, in the year of our
Lord One thousand eight hundred and sixty-seven.
Witness,
J. W. MOFFATT,
66, Chancery Lane.
N. SALAMON. (LS.)