Improvements in the Manufacture of Pipe-hooks or Hook-headed Nails.
Year: 1888

page_text: Improvements in the Manufacture of Pipe-hooks or Hook-headed
Nails.
I, HENRY HARRIS LAKE, of the firm of Haseltine, Lake & Co. Patent Agents,
Southampton Buildings, in the County of Middlesex, 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 relates to gas-fitters pipe-hooks made from sheet-metal plates or
strips, and it has for its object a method or process of cutting the hook-blanks from
sheet-metal plates whereby they can be more rapidly and cheaply made than hereto-
fore and which produces a better quality of hook and a more durable one than has
previously been cut from sheet-metal plates or strips.
This improved method primarily consists of cutting a hook blank from the plate and
at the same time to cut a scrap or waste part to form the heel of the succeeding hook-
blank to be cut from the plate as hereinafter more particularly set forth.
The said improved method further consists in simultaneously cutting the hook-blank
and the scrap or waste to form the heel of the succeeding hook-blank as described
and then conveying the severed blank between dies or compressing and shaping
surfaces to suitably configure that part of the blank from which the curved part of the
hook is made, as hereinafter more particularly set forth.
The improvements further consist in a hook cut from a sheet-metal plate and having
on the exterior side of its curved part a strengthening rib or bead extending from the
point to the heel of the curve.
Referring to the accompanying drawing
Figure 1 represents a plan of a plate of sheet metal showing the first cut made
thereon, and indicating by dotted line, the hook-blank to be severed therefrom by the
next or succeeding ent.

page_text: "
Figure 2 is a similar view showing the said cut effected to sever the blank and at
the same time to cut away the scrap or waste portion of the plate to form the heel of
the hook-blank next to be cut from the plate.
Figure 3 is a similar view wherein a number of successive cuts are indicated by
dotted lines.
Figure 4 shows side and edge views of a hook-blank.
Figure 5 shows a view of the scrap or waste cut from the plate to form the heel for
the blank next to be cut from the plate, and
Figure 6 shows a view of a finished pipe hook.
In carrying the said invention into practice I may use a cutting machine of any
suitable kind I prefer however, to use the well known form employed for cutting nails.
In this machine I arrange a chisel-knife of a shape to correspond with the line 1 to 1
Figure 1. A represents the sheet metal-plate, the grain of which runs in the direction
of arrow x, B the hook-blank cut therefrom, and C the scrap or waste portion cut
from the plate to form the heel b for a blank.
The operation is as follows; The plate A is preferably brought to a red-heat, and
held by a pair of clamping tongs; the first cut severs a waste or scrap portion C to
form the heel and also makes a slightly inclined straight cut from a to a seo
Figure 1.
Where the chisel is not made to reverse in the machine, the plate A is then turned
over from left to right or right to left as the case may be, and the succeeding operation
cuts the blank B and at the same time the waste or scrap U for the next blank to
be cut as indicated in Fig. 2. By sucessively turning the plate as described, each
successive cut, severs a blank B and cuts away the scrap or waste C for the heel b
of the next blank to be cut.
'
According as that part of the blank which is to form the curved part of the hook
is to be plain in its outline or is to be finished, the blank after it is cut is either
conveyed from the machine or passed to suitable pressing or shaping dies or surfaces.
Thus if no finish is to be given to the curved part 1 of the hook the part of the blank corre-
sponding therto may be fully formed by the cut and the blank allowed to drop out
of the machine, but if a finish is required, the blank is carried to suitable shaping and
pressing surfaces which compress and shape said part as desired. In the drawings
I have shown said part compressed or flattened as indicated at 6 and having on its
exterior side a longitudinal rib 63 extending from the heel b to near the end 4 of
said flattened or compressed part 6' said end b being preferably drawn or compressed
to a point or approximating thereto as shown in Figure 4 while subjected to
pressure between the dies or pressing surfaces after which it drops from the
machine.
The knife or chisel for cutting the scrap or waste and blank B, may be so
formed that in cutting the waste C and blank B, the waste C is entirely severed from
the blank, in which case the scrap C drops from the machine while the blank is
conducted to the dies for shaping or forming its part b¹ as above described.
On the other hand, said knife or cutter may be formed that the waste C and
blank B remain connected after the cut is made, in which case the scrap or waste ()
is carried along with the blank as it is conducted to its compressing dies which are
so made that the scrap or waste C does not interfere with the shaping of the blank
as above described in which case, the scrap is broken off from the blanks after they
drop from the machine.
After the blanks are made, their parts 61 are suitably curved into shape by suitable
shaping mechanism or otherwise as desired.
The finished hook may be galvanized or dipped in paint or other material, if
desired.
When the hooks or blanks are cut from sheet-iron plates, the latter are preferably
heated as set forth, but if cut from copper, composition or other analogous soft
metal, they are preferably cut cold or no heating of the plates is required.
In cutting the hooks in machines having rotating or reversing chisels or cutters
the plato A is not turned over at each successive cut.
J.J

page_text: Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed as communicated to me
by my foreign correspondent I declare that what I claim is:
-
First The manufacture or mode of making pipe-hook blanks from sheet metal
plates consisting of simultaneously cutting a hook-blank and a waste or scrap portion
to form the heel for the succeeding blank to be cut, substantially as set forth.
Second-The manufacture or mode of making pipe-hook blanks from sheet-metal
plates consisting of simultaneously cutting a hook-blank and a waste or scrap portion
to form the heel for the succeeding hook-blank to be cut from the plate and then
subjecting the blank to compressing and shaping dies or surfaces, substantially as set
forth.
Third The manufacture or mode of making pipo hook blanks from sheet metal
plates consisting of simultaneously cutting a hook-blank and a waste or scrap
portion to form the heel for the succeeding hook-blank to be cut from the plate and
each succeeding scrap or waste and blank being alternately cut from opposite sides of
the plate, substantially as set forth.
Fourth The manufacture or mode of making pipe hook-blanks from sheet metal
plates consisting of successively cutting a hook-blank B and a scrap or waste C
from the plate at one and the same cut or chop and turning the plate over from side
to side after each cut, substantially as set forth.
Fifth A pipe hook, the blank for which is cut from a sheet metal plate and
subjected to pressing or shaping dies or surfaces substantially as set forth.
Sixth-A pipe hook, cut from a sheet metal plate having a tang, a heel, and a
curved part provided on its exterior side or surface with a longitudinal rib extending
from near its point to said heel, substantially as set forth.
Seventh A pipe hook cut from a sheet metal plate having a tang, a heel and a
curved part configured by subjecting it to compressing and shaping dies or surfaces
substantially as set forth.
Eighth The manufacture of a pipe hook by first cutting from a flat metal plate
a portion D to form the heel b turning the plate and cutting the blank B which is
afterwards turned at 6' to form a pipe hook, as shown and described.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, .
Agents for the Applicant.