Machine for Covering Electrical Conductors and Cables with Lead.
Year: 1890

page_text: Date of Application, 18th Apr., 1890
Complete Specification Left, 15th Jan., 1891-Accepted, 28th Mar., 1891
PROVISIONAL SPECIFICATION.
Machine for Covering Electrical Conductors and Cables with Lead.
I, SYDNEY PITT, of Sutton, in the County of Surrey, Gentleman (a com-
munication to me from abroad by James Bassnett Atherton, of New York City,
State of New York, United States of America), do hereby declare the nature of
this invention to be as follows:-
In this improved machine the lead cylinder is arranged transversely to the
hollow core bar and die, but at the rear of the die proper where the end of the core
bar and the face of the die approximate each other, and between the end of the
core bar and the extension of the lead cylinder I place a partition which serves as
a support for the end of the core bar and has apertures through which the lead is
forced into the lead chamber surrounding the end of the core bar.
This partition
is made removable so that the opening in the block which constitutes an extension
of the lead cylinder and contains the lead chamber and the core bar and die, may
be entirely opened through and through.
An
Between the head and cylinder of a lead press a block is removably seated.
extension of the lead cylinder is formed in the block, its curve in horizontal section
being preferably contracted towards the base of the extension or chamber on one
side which we call the rear of the chamber. The block is bored from its rear face
into the chamber for the reception of the hollow core bar that is held up to its work
by a hollow screw-threaded follower. The front of the block, which is formed with
a lateral enlargement, is also bored out into the front of the chamber and into the
opening thus formed the partition is inserted. This partition may have its rear face
curved to conform to the curved wall of the chamber, and has bearings in the walls
of the chamber. The forward part of this enlarged opening in the block is screw-
threaded for the reception of a plug, which when screwed in, firmly holds the
partition in place. The partition has a central opening concentric with the opening.
in the block through which the hollow core bar passes and in this central aperture
in the partition the forward end of the core bar has its bearing. Preferably the
core bar projects through the partition into the lead chamber formed by the
recessed end of the plug only a sufficient distance to permit the removal and
replacement of the noses or tips of the core bar, which are to be changed as usual
according to the size of the wire or cable to be covered.
The partition is cut away at two or more sides or is also formed with apertures
arranged equi-distant around the central opening in which the hollow core bar is
seated. These openings serve for the passage of the lead from the chamber forming
the extension of the lead cylinder into the lead chamber. The screw-threaded plug
is bored centrally concentric with the core bar and in the opening thus formed is
seated the die which is held in position and adjusted by a screw-threaded follower
as usual. The die and follower are also removable at pleasure for the substitution
of other dies and followers adapted to the size of the wire or cable to be covered.
The lead cylinder having been charged with lead in the proper condition and the
press being operated, the lead from the extension of the cylinder is forced through
the opening in the partition into the lead chamber. The direction of the flow of
the lead through the openings is in line with the direction of travel of the
insulated conductor or cable that is passing through the hollow core bar and die.
In case of accident, which however in such a machine as this would be very
unusual and unlikely, the core bar and plug may be removed and the partition taken
This may be done either by cutting the lead away from the partition both at
front and rear or by operating the press and causing the lead to force the partition
out ahead of it.
out.

page_text: A tube may be connected with or formed in one piece with the partition and
extend rearwardly across the extension of the lead cylinder through the wall of the
block, and in this tube the hollow core, bar may be inserted so as to project beyond
the partition as already described. One advantage of such a construction is that
the pressure of the lead is not exerted upon the core bar, but is received by the tube
within which the core bar.lies. The block may be divided longitudinally to permit of
the placing in position of the partition or of the partition and tube in which event
the screw plug in which the die is seated will be unnecessary and the die may be
seated directly in the block, the die and the tube being held between the upper and
lower sections of the block. The block might be divided vertically if desired,
without departing from the invention.
COMI LETE SPECIFICATION.
Machine for Covering Electrical Conductors and Cables with Lead.
I, SYDNEY PITT, of Sutton, in the County of Surrey, Gentleman (a com-
munication to me from abroad by James Bassnett Atherton, of New York City,
State of New York, United States of America), 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:-
The object of my invention is to provide a machine for covering insulated con-
ductors, and cables of insulated conductors, with lead, in which the core-bars and
dies may be readily removed and replaced to adapt the machine to the covering of
different sized conductors and cables, and in which the charge of lead may be readily
removed from the lead chamber in the block upon the shutting down of the
machine.
.
In Sheets 1 and 2-
Figure 1 is a vertical longitudinal section on the line 1, 1, of Figure 2:
Figure 2 is a horizontal section on the line 2, 2, of Figure 1:
Figure 3 a transverse vertical section on the line 3, 3, of Figure 1; and
Figure 4, a section similar to Figure 1, but showing a core bar and die of small
diameter to be used in the covering of single insulated conductors for arc light and
power circuits.
A represents the head of the press, and B the cylinder within which the lead
chamber B is formed. Between these two parts is placed the die-block which is
horizontally divided into two parts C C. Between the two parts of the die-block
is located a core-bar support D formed in one piece with a rearwardly extending
sleeve D' through which the core-bar is inserted and removed and the end of which
is mounted in the rear walls of the die-block. The support D is seated at dd in
suitable seats or sockets preferably formed in the upper as well as the lower section
of the die-block. The die-block is formed with a chamber F constituting a pro-
longation of the lead chamber, and across the chamber F the sleeve D extends.
The support D is shown cut away upon each side at d¹ d', and through the openings
thus formed the lead is pressed from the chamber Finto the lead pipe forming
chamber G. The upper portion of the support D, seated in the upper half
of the block might be cut entirely away, since the part D merely serves
to support the core-bar. A core-bar H through which the cable or con-
ductor to be covered is led, is inserted through the rear wall of the die-
block-sleeve D¹, and support D, and projects beyond the support D into
the lead pipe-forming chamber G. A corresponding die I is mounted on the
front wall of the die-block, immediately opposite and concentric with the core-bar H.
The core-bar may be adjusted by a screw-threaded follower H', and the die by a
similar follower 1. The two halves of the die-block are maintained in proper
relation to each other by dowels c¹ on the upper half of the block entering
corresponding sockets in the lower half. Any suitable well known arrangement

page_text: for bolting the halves of the die-block together may of course, be adopted. The
exact shape of the chamber F, G, within the die-block is not an essential con-
sideration, and the contour of the chamber shown in the drawing may be varied.
Similarly the support D may be cut away more or less than indicated at d', all such
matters being mere details of construction which may be varied.
The organization shown in Figures 1, 2 and 3 is adapted for the covering of
cables of insulated conductors. In Figure 4 is shown an arrangement that may be
adopted where the size of the core-bar and die is to be reduced. The rear end of
the sleeve D' is formed with an annular_socket d and a sleeve K may be inserted
within the opening in the parts D D to reduce the interior diameter, such
a diameter reducing sleeve being preferably formed at its rear with an annular
flange k, which is then seated in the annular socket 2 in the rear end of the
sleeve D'. The core-bar is then inserted within the sleeve K and adjustable
by a follower as before. This core-bar may, if desired, be formed of three
parts, as follows: H the nose of the core-bar, H2 a hollow section and F³ the
rear section against which the follower H bears. To provide for the use of a die I,
similarly reduced in diameter, a sleeve 12 within which the die is seated, may be
placed in the opening in the front wall of the die-block, and adjusted by the
follower I'
By dividing the block horizontally, the support D and sleeve D¹ may be readily
placed in position, or lifted out as may be desired. With regard to their removal,
since it is desirable and indeed necessary to remove all lead from the die-block when
work is stopped for the day, the facility with which the parts of the block may
be separated and the support and core-bar removed, and the die-block freed from
lead, is a very material advantage. The function of the support D is to support
the core-bar in proper relation to the die, and in such manner as to prevent it being
displaced by excessive strain. By employing the sleeve D' I am enabled to with-
draw the core-bar and insert another at any time, because the bar is not embraced
directly by the lead, except its extreme end or nose, and is always capable of being
moved in the sleeve.
In Sheet 3 Figure 5 is a vertical section of so much of the apparatus as is neces-
sary to illustrate my invention.
Figure 6 is a horizontal section on the line 2, 2, of Figure 7 and
Figure 7 is a vertical section on the line 3, 3, of Figure 6, through the block in
which the extension of the lead cylinder is formed.
In the construction shown in this sheet the block is solid and the tube extending
back from the support is omitted.
A represents the head of a press, B the plunger and C the lead cylinder. Between
the head and cylinder a block D is removably seated. An extension E, of the lead
cylinder, is formed in the block, its curve in horizontal section being preferably
contracted towards the base of the chamber on one side. The block is bored from
its rear face into the chamber E for the reception of the hollow core bar F that is
held up to its work by a hollow screw-threaded follower F'. The front of the
block D which is formed with a lateral enlargement D', is also bored into the front
of the chamber E and into the opening thus formed the support G is inserted. The
forward part of this enlarged opening in the block is screw-threaded for the
reception of a plug H, which when screwed in, firmly holds the support G in place.
F is the core-bar having noses or tips that may be changed according to the size
of the wire or cable X to be covered.
Openings in the support serve for the passage of the lead from the
chamber E into the lead chamber I. The die Khaving a follower Kis
mounted in the plug H.
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
1. The combination, with a die-block having a lead chamber formed therein and

page_text: °
openings for the entrance of the core-bar and die, of a support having a rearwardly
extending sleeve, within which support and sleeve the core-bar is seated and
supported, substantially as set forth.
2. The combination, substantially as set forth of the horizontally divided die-
block, the lead chamber formed therein, the support seated between two halves of
the die-block and reduced or cut away to permit the entrance of the lead to the
pipe-forming chamber, and the sleeve extending rearwardly from the support and
seated in the rear wall of the die-block, the core-bar seated within the sleeve and
support and the concentrically arranged die supported in the wall of the die-block
opposite the end of the core-bar.
3. The combination, substantially as set forth, of the die-block, the support and
rearwardly extending sleeve thereof D¹ seated within the die-block, the diameter
reducing sleeve K within the sleeve D', and having a flange k seated in an annular
socket in the end of the sleeve D₁, and the core-bar arranged within the
sleeve K.
4. The combination with the lead cylinder of the block having a chamber con-
stituting an extension of the lead cylinder, and an opening through the block from
each side into the chamber and transverse to the lead cylinder, a partition or core-
bar support between the chamber and one of said transverse openings, a hollow
core having its inner end mounted in said partition, and an opposite concentrically
arranged die.
5. The combination, substantially as set forth with the lead cylinder, of the
block having a chamber forming an extension of the lead cylinder, and aperture for
the hollow core-bar transverse to the axis of the cylinder and an opening on the
opposite side also extending into the cylinder, and a removable apertured
support or partition in which the inner end of the core-bar is mounted, the
recessed plug and the die mounted therein concentrically with the hollow core-bar.
6. Mechanism, substantially such as herein described for covering insulated
electrical conductors with lead.
Dated this 14th day of January 1891.
CARPMAEL & Co.,
Agents for the Applicant.