IMPROVEMENTS IN CAPS FOR SPINNING SPINDLES
Year: 1876

page_text: LETTERS PATENT to John Henry Johnson, of 47, Lincoln's Inn Fields, in the
County of Middlesex, Gentleman, for the Invention of "IMPROVEMENTS IN
CAPS FOR SPINNING SPINDLES." A communication from abroad by Charles
Weiler, of Philadelphia, Pennsylvania, United States of America.
Scaled the 26th May 1876, and dated the 5th April 1876.
PROVISIONAL SPECIFICATION left by the said John Henry Johnson at the
Office of the Commissioners of Patents on the 5th April 1876.
JOHN HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of Middlesex,
Gentleman. "IMPROVEMENTS IN CAPS FOR SPINNING SPINDLES." A communication
from abroad by Charles Weiler, of Philadelphia, Pennsylvania, United States of
America.
This Invention relates to the manufacture of eyes used in connection with
stationary spindles on which bobbins are caused to revolve in spinning machines,
and consists in making the caps of glass, so that they will present a smooth surface
for the yarn to bear against, will not attract moisture so readily as a metal
surface, and will not require the constant cleansing which a cap of polished metal
demands.
The cap is made in the same manner as other articles of pressed glass are made,
that is to say, by the use of a mould of the desired external shape of the cap in
conjunction with a plunger for imparting the proper conformation to the interior.
The hole in the top of the cap for the reception of the spindle may be made by first
boring and then grinding the hole to the desired taper, or the hole inay be made
during the process of moulding the glass, the plunger having a central sliding rod,
and the end of the latter forming the desired taper hole, which must necessarily be
concentric with the cap. In lieu of formning the hole for the spindle directly in the
glass it may be made in a thimble secured to the glass during the process of
moulding, the central position of the plunger in the mould being insured by a pin
or plunger during the operation of pressing the glass. The thimble may be pro-
vided with a series of grooves for insuring its retention in place, but it is
preferred to make the metal thimble with wings, the same being embedded in the
glass while it is being moulded, and serving to effectually secure the thimble in its
place.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said John Henry Johnson in the Great Seal Patent Office on the 4th
October 1876.
JOHN HENRY JOHNSON, of 47, Lincoln's Inn Fields, in the County of Middlesex,
Gentleman. "IMPROVEMENTS IN CAPS FOR SPINNING SPINDLES." A communi-
cation from abroad by Charles Weiler, of Philadelphia, Pennsylvania, United States
of America.
The said Invention relates to the manufacture of caps used in connection with
stationary spindles on which bobbins are caused to revolve in spinning machines,
and it consists in making the caps of glass, so that they will present a smooth
surface for the yarn to bear against, will not attract moisture so readily as a metal
surface, and will not require the constant cleaning which a cap of polished metal
demands.
And in order that the said Invention may be fully understood, I shall now
proceed more particularly to describe the same, and for that purpose shall refer to
the several Figures on the annexed Sheet of Drawings, the same letters of reference
indicating corresponding parts in all the Figures.
In the accompanying Drawings, Figure 1 represents a spindle of the class to
which this Invention relates, the cap of the spindle being in section.
A represents the spindle; B, the pulley for supporting the bobbin; and D, the
cap, which is made of glass in lieu of metal.
The cap is made in the same manner as other articles of pressed glass are made,
that is to say, by the use of a mould of the desired external shape of the cap in
conjunction with a plunger for imparting the proper conformation to the interior.
The hole in the top of the cap for the reception of the spindle may be made by first
boring and then grinding the hole to the desired taper, or the hole may be made
during the process of moulding the glass in the manner shewn in Figure 2, in
which I represents a portion of the plunger, and part of the mould, the plunger
having a central sliding rod H, the end of which forms the desired taper hole, which
must necessarily be concentric with the cap. In lieu of forming the hole for the
spindle directly in the glass it may be made in a thimble K secured to the glass
during the process of moulding the same, as shewn in Figure 3, the central position
of the plunger in the mould being insured by a pin or plunger during the operation
of pressing the glass. In Figure 3 the thimble is shewn provided with a series of
grooves for insuring its retention in place, but it is preferred to make the metal
thimble with wings d, d, d, d, as shewn in Figures 4 and 5, such wings being
imbedded in the glass while it is being moulded, and serving to effectually secure
the thimble in its place.
Having now described and particularly ascertained the nature of the said
Invention, and the manner in which the same is or may be used or carried into
effect, I would observe in conclusion that what I consider to be novel and original,
and therefore claim as the Invention secured to me by the herein-before in part
recited Letters Patent is―
First. The glass cap having an orifice adapted to the spindle, as herein-before
described.
Second. The combination of the spindle, the glass cap, and the thimble embedded
in the same, and adapted to the spindle, all substantially as herein-before described.
In witness whereof, I, the said John Henry Johnson, have to this my Speci-
fication set my hand and seal, this Fourth day of October One thousand
eight hundred and seventy-six.