Improvements in Sewing Machines.
Year: 1888

page_text: ate of Application, 9th Oct., 1888
Complete Specification Left, 8th July, 1889-Accepted, 21st Sept.. 1889
PROVISIONAL SPECIFICATION.
Improvements in Sewing Machines.
I, JULIUS GUTMANN of Alexanderstrasse, Berlin, in the German Empire, Merchant
do hereby declare the nature of this invention to be as follows:
This invention has reference to means for insuring a straight vertical motion of
the needle rod in the beavier class of sewing machines which it is desired to use
for ornamental, eyelet, over-edge and button hole "bar" stitching.
For this purpose I mount on a pivot on the fixed upper frame of the machine a
lever which is caused to move horizontally to and fro by the action of a guide cam
groove formed in the driving wheel, on the lower back end of the said lever. Its
front end is slotted to receive a bearing carrying a pivot fixed on the vertical needle
rod. This latter is of rectangular cross section and is carried so as to be capable of
sliding up and down in a pair of guide bearings fixed on the front end of an arm
carrying the needle rod. This needle rod arm is mounted on the fixed frame so as
to be horizontally displaceable thereon along a dovetail slide groove.
It may slide
horizontally over the same pivot that the said guide cam groove lever oscillates upon
and is caused to do so by a cam fixed on the driving shaft operating a double armed
lever jointed at its upper end to the said horizontally sliding needle rod arm and at
its lower end bearing against the cam on driving shaft. The horizontal travel of the
needle rod arm is regulated by the adjustment by means of a handle of an eccentric
mounted on the fixed machine frame, the eccentric on being turned round being
brought to bear more or less against the double armed lever between the cam and
needle rod arm. This latter is further carried on the upper horizontal fixed arm of
the machine frame by a slot in the same taking on to a slide part projecting from
the said horizontal arm. The slot is partly occupied by a spring fixed in the same
by one of its ends and by its other end fixed to the stationary slide part. In this
way the spring tends to resist the movement given to the needle rod arm by the
action of cam and double armed lover.
Dated thin Och dave of Ontaboy 1900
CAPITAINE & VON HERTLING,
89, Chancery Lane, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Sewing Machines.
I, JULIUS GUTMANN of Alexanderstrasse, Berlin in the German Empire, Merchant,
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:
This invention has reference to means for insuring a straight vertical motion of
the needle rod in the heavier class of double stitch sewing machines which are or may
be used for ornamental, eyelet, over edge, and button hole "bar" stitching.
In the accompanying drawing so much of a sewing machine as is necessary to
illustrate the invention is shewn in Fig. 1, in side elevation, Fig. 2 being a vertical
section through the head of the machine frame which carries the needle rod.
His a lever oscillating on pivot h fixed in the machine frame, having its motion
corresponding to the up and down travel of the needle communicated to it from
driving wheel K through pin which slides in a cam guide groove v formed in the
said wheel. Lever H at its front end is slotted to receive a bearing blocks mounted
so as to le capable of turning on a pivot g fixed in needle rod N." The latter is of
0237

page_text: rectangular cross section and is carried in small guide bearings on needle rod
slider which is mounted so as at its needle end to be sidewise displaceable along
a broad dovetail slide surface formed in the front end of the machine frame, and also
sidewise displaceable over pivot on which lever H oscillates.
The double lever e¹ having its point of oscillation at is by means of eye and
pivot el jointed to this end of needle rod slider L and by its other extremity bears
against cam E fixed on the driving spindle, this cam communicating to lever e¹ its
scillating motion for effecting the horizontal to and fro movement of needle rod
slider L. The stroke of lever e¹ and consequently the length of the sliding travel of
needle rod siider L is regulated by means of an excentric e mounted on boss and
operated by handle ¹.
Needle rod slider I, is further carried on the horizontal fixed arm of the machine
frame B by a slot in the former taking on to a dovetail slide part projecting from B.
The slot is partly occupied by a spring f, fixed by one of its ends to the part fand
by its other end to the needle rod slider L. In this way the spring acts in a direction
contrary to that communicated to the needle rod slider L by lever e¹.
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:
In double stitch sewing machines by which ornamental, eyelet, over edge and button
hole "bar" stitching may be sewn, the arrangement of slider L displaceable on the
fixed frame, carrying guide bearings of the needle rod moving parallel to its
longitudinal axis a forward motion being communicated thereto by cam E and
lever e and a backward motion by spring in combination with lever H for working
the needle rod up and down, for the purpose specified substantially as described
and shewn.
Dated this 8th day of July 1880
CAPITAINE & VON HERTLING,
89, Chancery Lane, London, W.C., Agents for the Applicant.