Improvements in Machinery or Apparatus for the Manufacture of Metal Lathing.
Year: 1893

page_text: Date of Application, 24th Feb., 1893
Complete Specification Left, 23rd Nov., 1893-Accepted, 23rd Dec., 1893
PROVISIONAL SPECIFICATION.
Improvements in Machinery or Apparatus for the Manufacture of
Metal Lathing.
I, WALTER WHITFIELD BOSTWICK, of 38 Park Row, in the City of New
York, United States of America, Engineer, do hereby declare the nature of this
invention to be as follows:-
My invention relates to improvements in machinery or apparatus for the
manufacture of metal lathing.
In the machine for making metal lathing described in the Specification of prior
Letters Patent granted to Henry Harris Lake, No. 13,007 dated the 19th day of
August, 1890, two rolls are employed to operate upon sheet metal which is passed
between them. The said rolls are each formed of series of concentric discs. One
roll consists of a series of punching discs, with collars between them, and is termed
the punching roll. The other roll consists of recessed discs with shearing discs
between them and is termed the die-roll. One of the objects of my invention is to
improve the construction of such machines by making the punching surfaces of the
punching roll removable and reversible. Another object of my invention is to
secure the several parts of the punching roll upon the punching-roll shaft by simple
means, and in such manner that any one of the aforesaid punching surfaces can be
readily turned reversed or removed without necessitating a lengthy interruption
to the working of the apparatus.
According to my invention the said punching discs are dispensed with and
punching-pieces are substituted therefor. A series of such punching-pieces is
placed in a circle between each pair of collars on the punching roll so that one
portion of the edge of each piece projects beyond them. Each of the said
punching-pieces is provided with a central hole. Studs are provided upon the
aforesaid collars to enter the central holes in the punching-pieces.
The said pieces preferably have portions of their peripheries removed or are
otherwise so formed that when in place in the punching roll they interlock with
each other and are thus enabled to be spaced more closely than if they were
completely circular: But when desired, punching-pieces which are completely
circular may be used. Endwise movement of the punching-pieces is prevented by
the arrangement of the collars, which are just sufficiently far apart to receive the
punching-pieces between them.
The said collars are retained in place upon the punching-roll shaft by means
which will permit them to be moved end wise, when necessary, to enable any of the
punching-pieces to be removed from between them. When worn at one edge any
punching-piece can be very readily removed from its stud, reversed or partially
turned, and replaced thereon so that another and unused edge protrudes beyond
the collars; fresh pieces can at any time be substituted for others which are not fit
for further use.
The said punching-pieces may be conveniently constructed by taking circular
discs and removing a portion of each by planing or otherwise, to enable a circular
portion of the contiguous punching piece to interlock with the recess thus formed.
In the die-roll, instead of employing recessed discs which are liable to clog and
fill up, I employ plain discs which are of smaller diameter than the shearing-discs
and are much cheaper to manufacture than the recessed discs formerly employed.
A suitable brush is provided, in proximity to either or both of the rolls; the

page_text: said brush is so mounted that it can be turned into position to bear upon the roll or
rolls to keep the working surfaces clean during the rotation of the same.
Dated this 24th day of February 1893.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Machinery or Apparatus for the Manufacture of
Metal Lathing.
I, WALTER WHITFIELD BOSTWICK, of 38 Park Row, in the City of New
York, United States of America, Engineer, 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 :-
. My invention relates to improvements in machinery or apparatus for the
manufacture of metal lathing.
In the machine for making metal lathing described in the Specification of prior
Letters Patent granted to Henry Harris Lake, No. 13,007 dated the 19th day of
August, 1890, two rolls are employed to operate upon sheet metal which is passed
between them. The said rolls are each formed of series of concentric discs. One
roll consists of a series of punching discs, with collars between them, and is termed
the punching roll. The other roll consists of recessed discs with shearing discs
between them and is termed the die-roll. One of the objects of my invention is
to improve the construction of such machines by making the punching surfaces of
the punching roll removable and reversible. Another object of my invention is to
secure the several parts of the punching roll upon the punching-roll shaft by simple
means and in such manner that any one of the aforesaid punching surfaces can be
readily turned reversed or removed without necessitating a lengthy interruption to
the working of the apparatus.
In the die-roll, instead of employing recessed dises which are liable to clog and
fill up I employ plain discs which are of smaller diameter than the shearing-dises
and are much cheaper to manufacture than the recessed discs formerly employed.
A suitable brush is provided in proximity to either or both of the rolls; the
said brush is so mounted that it can be turned into position to bear upon the roll
or rolls to keep the working surfaces clean during the rotation of the same.
In order that my said invention may be clearly understood I will now proceed to
describe the same with reference to the accompanying drawings, wherein,
Figure 1 is an elevation of two rolls and a brush for cleaning the same according
to my invention.
Figure 2 is a transverse section on the line X X Figure 1, looking in the direction
of the arrow, and
Figure 3 is a view, drawn to a larger scale, of one of the punching-pieces
hereinafter described.
Like letters indicate corresponding parts throughout the drawings.
A is the punching roll, B is the die-roll, and C the frame of the machine. The
punching discs a of the punching roll are each formed of a series of punching-
pieces a mounted on studs a² provided on the collars a³. The punching-pieces, a
view of one of which is shewn in Figure 3 are preferably circular, having a
hole in the centre into which the studs a' can enter, and a portion of the
periphery of each is removed as at at by milling or otherwise so that the said
piece can be spaced more closely, and contiguous punching-pieces can interlock
as shewn in Figure 2. The punching-pieces are arranged to project a suitable
distance beyond the collars a and endwise movement of the same is prevented
by said collars, which are just sufficiently far apart on the shaft to receive the
punching-pieces between them. Said collars are retained in their places on the
punching roll shaft by the nut D, and when any of the punching-pieces are worn

page_text: at one edge, the punching roll shaft is removed from its bearings, the nut D slacked
back and the collars separated so as to allow the faulty punching-piece to be
removed from its stud, turned round or reversed, and then put back in place again;
or fresh pieces may be substituted for those which are no longer fit for use. In the
die-roll, b are the circular collars or rings which I employ instead of the notched
discs hitherto used; said collars are the same thickness as the punching pieces and
are smaller in diameter than the shearing discs b¹.
E is a brush mounted in bearings on any suitable part of the frame and furnished
with a handle E' as shewn in the drawings, by means of which it can be rotated so
as to bear upon the surfaces of the die-roll and keep it clear of fragments, chips
and the like; it is obvious that I may also use a brush to press on the surface of
the punching roll for a similar purpose.
Although I have in the drawing shewn punching pieces of approximately circular
form, it is to be understood that I may use any convenient form of punching-piece
for the purposes of this invention.
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. In a machine for making metal lathing, a punching roll having the punching
surfaces formed by a series of readily detachable pieces mounted on studs carried
by intermediate collars, substantially as, and for the purposes, specified.
2. A machine for making metal lathing wherein the punching surfaces of the
punching roll are formed by a series of readily detachable and reversible pieces
mounted on studs carried by intermediate collars, and the recessed dises of the die-
roll are replaced by circular rings or collars smaller in diameter than the shearing-
discs of the said die-roll, with or without the brush for keeping the working
surfaces clean, substantially as hereinbefore described for the purposes specified.
3. Punching-pieces adapted to interlock with each other, substantially as herein-
before described for the purposes specified.
4. The machine for making metal lathing, constructed and operating substan-
tially as herein before described with reference to the accompanying drawing, for
the purposes specified.
D
3 1°
00. 31
CAT
1 1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.