Improvements relating to the Manufacture of Sheet Metal Hooks.
Year: 1892

page_text: Date of Application, 12th Dec., 1892
Complete Specification Left, 7th Sept., 1893-Accepted, 7th Oct., 1893
PROVISIONAL SPECIFICATION.
[Communicated from abroad by HENRY EUGENE KELLEY, of Niagara Fall, in
the County of Niagara and State of New York, United States of America,
Machinist.]
Improvements relating to the Manufacture of Sheet Metal Hooks.
I, HENRY HARRIS LAKE, of the Firm of Haseltine Lake & Co., Patent Agents
45 Southampton Buildings in the County of Middlesex, do hereby declare the
nature of this invention to be as follows:--
This invention relates to an improved method of making harness check-books
from sheet metal.
My invention has for its object to produce a cheaper and stronger check-hook
than can be produced by casting and to facilitate the operation of polishing or
finishing the hook.
In carrying my invention into practice a straight, flat blank of the proper form
is first cut from a strip of steel or other sheet metal by suitable dies or cutters, a
number of such blanks being preferably cut at one operation. These blanks have
substantially the dimensions and outlines of the hooks to be produced so that no
metal is wasted. The desired cross section which the check hook is to have is next
imparted to the blank by stamping the same by means of dies having suitable
shaping faces, after which the bolt hole is punched in the large end of the blank by
a suitable tool.
The book is made convex on its inner side and its outer side is formed with a
raised marginal head. If preferred, the bolt hole may be formed simultaneously
with the cutting of the blank, or at the same time with the stamping operation.
The blank after being stamped and punched, is next polished or finished by buffing
or burnishing it, and it is then bent to the desired hook-form between suitable dies
having proper shaping faces or by other means.
I prefer to employ for this purpose, a machine consisting essentially of a
cylindrical die or abutment and a bending or shaping die having an outline or
shaping face corresponding to that of the hook to be formed the die being provided
on one side with a flat face against which the shank of the hook is placed, on its
opposite side with a concave face for forming the nose of the hook, and between
the faces with a convex face for forming the bight of the hook. The shaping die
is secured to the inner portion of a hand lever provided at its inner end with a hub
or journal which turns in an upright opening formed in a table or other support.
An upright pin or projection is arranged on the hand lever adjacent to the rear
side of the clamping die and between which latter. and the pin the. rear portion or
sbank of the blank is placed in.bending the same. The abutment die is journalled
upon the contracted upper end of au arbor which latter is secured in an opening in
the table.
In bending the straight hook-blank, the shank thereof is placed between the pin
and the adjacent face of the shaping die with the back or inuer face of the blank
against the shaping die. The latter is then turned by means of its hand lever. As
the inner end of the blank is firmly held against the shaping die, the free end of the
blank is compressed between the two dies and compelled to follow the contour of
the shaping die, thus bending the same into hook-form.
The abutment die is rotated from the shaping die by the frictional contact of the
intervening hook-blank so that the abutinent die is caused to turn with the same
peripheral speed as the shaping die, whereby marring or defacement of the polished
book-blank is prevented.

page_text: In making check-hooks from steel, the hook, after being. blanked, stamped,
punched and bent, is preferably tumbled, after which it may be tinned, lacquered,
japanned nickle-plated, or otherwise finished.
In making hooks from brass German silver, bronze, aluminium or other metal
having a smooth surface which is readily polished, the hook, after being blanked
and stamped to the desired cross section, is polished and then bent into hook
form.
A sheet metal book constructed according to my improved method is much
stronger than a cast metal hook and is produced at considerable less cost. The
stamping operation preceding the bending of the blank into hook-form, not only
imparts to the blank the desired cross section, but also compresses and compacts
the molecules of the metal thus rendering the hook very strong.
By polishing the hook-blank in its straight, flat form, instead of in- the curved
form, as is necessary in a-cast hook, all portions of the blank can be conveniently
presented to a buffing or polishing wheel, thus facilitating the polishing operation
and effecting a saving in time and labour....
The face of the hook may be ornamented with any suitable design or pattern in
stamping the blank, by providing the stamping dies with the desired ornamentations.
Dated this 12th day of December 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements relating to the Manufacture of Sheet Metal Hooks.
I, HENRY HARRIS LAKE, of the Firm of Haseltine Lake & Co., Patent Agents,
45 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 an improved method of making harness check-hooks
from sheet metal.
My invention has for its object to produce a cheaper and stronger check-hook
than can be produced by casting, and to facilitate the operation of polishing or
finishing the hook.
In the accompanying drawing:
Figure 1. is a perspective view of a number of hook-blanks arranged side by side
in the position in which they are cut from a strip-of sheet metal.
Figure 2 is a perspective view, showing the form of the blank after it is stamped
and perforated and before it is bent.
Figure 3 is a cross section of the blank.
Figure 4 is a perspective view of the finished hook.
Figure 5 is a fragmentary view of a machine which may be employed for bending
the stamped blank into a hook-form, and showing the blank in place between the
shaping dies, ready to be bent.
Figure 6 is a similar view of said machine, showing the position of the shaping
dies after the hook is bent.
... Like letters of reference refer to like parts in the several figures.
In carrying my invention. into practice a straight, flat blank A of the proper
form is first cut from a strip of steel or other sheet metal by suitable dies or
cutters, a number of such blanks being preferably cut at one operation, as shown in
Figure 1. These blanks have substantially the dimensions and outlines of the
hooks to be produced so that no metal is wasted. The desired cross section which
the check hook is to have is next imparted to the blank by stamping the same by
means of dies having suitable shaping faces, after which the bolt hole a is punched
in the large end of the blank by a suitable tool.
The hook shown in the drawing is made convex on its inner side and its outer

page_text: side is formed with a raised marginal bead. If preferred, the bolt hole may be
formed simultaneously with the cutting of the blank, or at the same time with the
stamping operation. The blank after being stamped and punched, is next, polished
or finished by buffing or burnishing it, and it is then bent to the desired hook-forin
between suitable dies having proper shaping faces, or by other means."
I prefer to employ for this purpose, a machine of the construction shown in the
drawing. This machine consists essentially of a cylindrical die or abutment B and
a bending or shaping die Chaving an outline or shaping face corresponding to that
of the hook to be formed, the die being provided on one side with a flat face c
against which the shank of the hook is placed, on its opposite side with a concave
face c' for forming the nose of the hook, and between the faces e c' with a convex
face for forming the bight of the hook. The shaping die is secured to the inner
portion of a hand lever D, provided at its inner end with a hub or journal & which
turns in an upright opening formed in a table or other support D. e is an upright
pin or projection arranged on the hand lever D adjacent to the rear side of the
clamping die C and between which latter and the pin the rear portion or shank of
the blank is placed in bending the same, as shown in Figure 5. The abutment-
die B is journalled upon the contracted upper end of an arbor f, which latter is
secured in an opening in the table D¹.
In bending the straight hook-blank, the shank thereof is placed between the pin e
and the adjacent face of the shaping die C, with the back or inner face of the
blank against the shaping die. The latter is then turned by means of its hand
lever in the direction of the arrow shown in Figure 5. As the inner end of the
blank is firmly held against the shaping die, the free end of the blank is compressed
between the two dies and compelled to follow the contour of the shaping die, thus
bending the same into hook-form.
The abutinent-die B is rotated from the shaping die by the frictional contact of
the intervening hook-blank, so that the abutment die is caused to turn with the
same peripheral speed as the shaping die, whereby marring or defacement of the
polished hook-blank is prevented.
.
In making check-hooks from steel, the hook, after being blanked, stamped,
punched and bent, is preferably tumbled, after which it may be tinned, lacquered,
japauned, nickle-plated, or otherwise finished.
In making hooks from brass, German silver, bronze, aluminium, or other metal
having a smooth surface which is readily polished, the hook, after being blanked
and stamped to the desired cross section, is polished and then bent into hook
form.
A sheet metal hook constructed according to my improved method, is much
stronger than a cast metal hook and is produced at considerable less cost. The
stamping operation preceding the bending of the blank into hook-form not only
imparts to the blank the desired cross section, but also compresses and compacts
the molecules of the metal thus rendering the hook very strong.
By polishing the hook-blank in its straight, flat form, instead of in the curved
form, as is necessary in a cast hook, all portions of the blank can be conveniently
presented to a buffing or polishing wheel, thus facilitating the polishing operation
and effecting a saving in time and labour.
The face of the hook may be ornamented with any suitable design or pattern in
stamping the blank, by providing the stamping dies with the desired ornamentations.
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 claim is :-
1. The herein described method of making a sheet metal hook, which consists in
cutting from a sheet of metal a straight blank having the dimensions and outlines
of the hook to be produced, then stamping the blank between dies to impart the
desired cross section and condense the metal, and then bending the stamped blank
into hook-form, substantially as set forth..

page_text: =
2. The herein described method of making a sheet metal hook which consists in
cutting from a sheet of metal a straight, blank having the dimensions and outlines
of the hook to be produced, then stamping the blank between dies to impart the
desired cross section and condense the metal, then polishing or finishing the stamped
blank, and finally bending the polished or finished blank into hook-form, sub- 5
stantially as set forth.
1000
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.