Improvements in Machinery for Grinding the Cutters used in Machines for Nailing, Screwing, Slugging, or similar Processes employed in the Manufacture of Boots and Shoes.
Year: 1892

page_text: Date of Application, 17th Dec., 1892
Complete Specification Left, 18th Sept., 1893-Accepted, 21st Oct., 1893
PROVISIONAL SPECIFICATION.
Improvements in Machinery for Grinding the Cutters used in
Machines for Nailing, Screwing, Slugging, or similar Processes
employed in the Manufacture of Boots and Shoes.
I WILLIAM HENRY DORMAN, of The Hawthorns, Newport Road, Stafford, in
the County of Stafford, Engineer do hereby declare the nature of this invention to
be as follows:-
This invention has for its object improvements in machines which attach soles to
boots or drive into soles or heels of boots nails, slugs or screws, the same being
supplied to the machine in continuous lengths in the form of wire of any desired
cross section and either plain, serrated or screw threaded, the machine cutting off
suitable lengths from the wire by means of knives, cutters or nippers.
For the purpose of grinding such knives, cutters or nippers, I apply to the
nailing, screwing or other machine a specially designed and constructed emery
wheel or other grindstone placing the same upon a suitable part of the machine
frame and driving it from a convenient rotating shaft of the machine.
The wheel or stone is arranged so that it is easily put in and out of gear. The
knives or cutters are cramped in a holder so that they may be set and ground at
any desired angle and the holder is mounted in a slide so that it can be traversed
to and fro across the grinding surface. Adjustment is provided for setting up the
knife or cutter until sufficiently ground.
Dated thin 19th 1.—^
comban 1000
W. H. DORMAN.
COMPLETE SPECIFICATION.
Improvements in Machinery for Grinding the Cutters used in
Machines for Nailing, Screwing, Slugging, or similar Processes
employed in the Manufacture of Boots and Shoes.
I, WILLIAM HENRY DORMAN, of The Hawthorns, Newport Road, Stafford, in
the County of Stafford, 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 :-
This invention has for its object improvements in machines which attach soles to
boots or drive into soles or heels of boots, nails, slugs, or screws the same being
supplied to the machine in continuous lengths in the form of wire of any desired
cross section and either plain, serrated or screw threaded, the machine cutting off
suitable lengths from the wire by means of knives, cutters or nippers.
For the purpose of grinding such knives, cutters or nippers I apply to the
nailing, screwing or other machine a specially designed and constructed emery
wheel or other grindstone placing the same upon a suitable part of the machine
frame and driving it from a convenient rotating shaft of the machine.
The wheel or stone is arranged so that it is easily put in and out of gear. The
knives or cutters are cramped in a holder so that they may be set and ground at
any desired angle and the holder is mounted in a slide so that it can be traversed
to and fro across the grinding surface. Adjustment is provided for setting up the
knife or cutter until sufficiently ground.
My invention is illustrated by the accompanying drawings in which,
Fig. 1. is a front elevation shewing the emery wheel or grindstone as applied to
iling machine

page_text: Fig. 3. is a detail.
Fig. 4. is another form of the emery wheel or grindstone.
Fig. 5. is a front elevation of a nailing or slugging machine with my improved
emery wheel or grindstone applied.
Fig. 6. is a front elevation of a screwing machine with my improved emery wheel
or grindstone applied.
Fig. 7. is a detail.
I provide a frame a. (Figs. 1. 2. 3 and 5) upon which I mount a bearing a¹.
The bearing a carries the spindle a² which is free to revolve therein.
Upon one end of the spindle a I mount an emery wheel or stone b. of the form
shewn securing it in place by a nut and washers b³ ³.
A portion of the frame a. is formed into a slide c. the slide surfaces being parallel
with the spindle a² which is preferably inclined to the horizontal as shewn.
Mounted on the slide c. is a saddle c' which may be set nearer to or further from
the face of the emery wheel b. by means of a screw c² and hand wheel c³ carried
in the frame a.
so that
of
The saddle has a cross slide in which is mounted a sliding stand
the same may be traversed to and fro by hand across and parallel to the face
the emery wheel b.
The stand has a bearing c in which is mounted by one end a shaft or bar c² so
that the latter is free to be turned in the bearing c into any desired position and
may be there cramped by means of a set screw ce provided for the purpose.
The other end of the bar c is slotted or notched so as to receive the machine
cutter or knife a. which is cramped therein by means of a set screw_c.
When this emery wheel is applied to a nailing or slugging machine, as shewn in
the before mentioned Figs. 1. 2. 3 and 5, I prefer to drive it in the manner now to
be described. I mount the previously mentioned bearing a' upon a pin d. in the
manner of a hinge to the frame a. and I provide upon the bearing a' an ear d'
which is connected by a link d³, jointed on pins d³, d, to a handle d³ pivotted on a
pin d to the frame a. so that movement of the handle d' gives a reduced movement
to the bearing a¹.
In a pocket e. provided on the frame a. is a spring e¹ which presses upon the
bearing a¹.
I mount upon the driving shaft f. of the machine (see Fig. 5) a friction wheel f
which preferably forms part of an idle pulley f2 (see Figs. 1. 2. and 3) and upon
the spindle a², I mount a small friction wheel 9. preferably leather covered.
The two wheels f¹ and g. are bevelled so as to properly engage each other.
When the handle is in the position as shewn in full lines in Fig. 3. the
spring e will press the wheel g. into engagement with the wheel f' but when the
handle d' is in the position shewn by the dotted lines in Fig. 3. the wheel g. will be
withdrawn from engagement with the wheel f¹.
The emery wheel is operated as follows: The machine knife or cutter x. is
cramped fast by means of the set screw with the end to be ground projecting
somewhat towards the emery wheel b. The bar c7 is turned in the bearing c until
the knife . is at the proper angle with the face of the emery wheel b. and it is
then cramped fast by the screw c8.
The emery wheel is set in motion by means of the handle and the knife x. is
traversed to and fro across the face of the wheel while the stand is set up by
means of the hand wheel c³ until the desired edge is obtained upon the knife or
cutter x.
Fig. 4. shews an emery wheel or grinding machine of a form suitable to be
placed on a bench or table. It is driven by fast and loose pulleys h. h¹ and has a
belt shipper. The emery wheel and knife holding arrangements are the same as
already described only that the spindle a³ and the slide care horizontal instead
of inclined.
Figs. 6 and 7. shew a convenient method of applying the emery wheel or
7

page_text: grinding machine to the machine known as the Standard Screw Machine. The
emery wheel spindle a' is driven by grooved pulleys i. and the band being led
over guide pulleys * and **.
The groove pulley i. may be formed on the side of the ordinary belt pulley which
gives motion to the head spindle of the machine or it may be separately mounted
and driven in any convenient manner.
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 improved machine for grinding the cutters used for cutting off the wire
in machines for nailing or slugging shoes as herein described and illustrated in
Figs. 1, 2. 3 and 5.
2. The improved machine for grinding the cutters used for cutting off the wire
in machines for screwing shoes as herein described and illustrated in Figs. 6 and 7.
3. In machinery for grinding the cutters used for cutting off the wire in machines
for nailing, screwing, slugging or similar processes employed in the manufacture of
boots and shoes. The improved cutter holder and slide for traversing the cutter
across the grinding surface and the screw for setting up the cutter until sufficiently
ground as herein described and illustrated in Figs. 1. 2. 4. 5. and 6.
4. The combination with a machine employing wire for nailing, screwing,
slugging or similar processes, employed in the manufacture of boots and shoes,
of an emery wheel or grinder for the purpose of sharpening the cutters used in
such machine for cutting off the wire substantially as described.
Dated this 16th day of September 1893.
W. H. DORMAN.