Improvements in the Manufacture of Horse Shoe and other Nails, and in Machinery therefor.
Year: 1891

page_text: Date of Application, 11th Apr., 1891
Complete Specification Left, 13th Nov., 1891-Accepted, 19th Dec., 1891
PROVISIONAL SPECIFICATION.
Improvements in the Manufacture of Horse Shoe and other Nails,
and in Machinery therefor.
We, GEORGE HENRY
Mechanical Engineer, and
York, Civil Engineer, do
follows:-
PARKIN, of Stalybridge. in the County of Chester,
FRANCIS PRESTON, of Kirkburton, in the County of
hereby declare the nature of this invention to be as
Our invention relates to the manufacture of nails and particularly to the nail
machine for which Letters Patent No. 14357 of October 22nd, 1887 were granted
to the above named G. H. Parkin.
The first part of our invention relates to mechanism for stopping the machine
automatically when a blank for a nail is inserted the wrong way in the feed table,
or so inserted that it cannot readily be pushed from the carrying table into the
rolls; to effect this we employ a clutch on the driving shaft of the machine which
is so connected to the pusher that when a blank through being wrongly placed or
from other cause, cannot readily be forced into the rolls the extra pressure on the
pusher causes a connection to be made with the clutch and so throws it out of gear
and stops the machine instantly before any damage can take place.
In order to feed the blanks to the machine with greater facility and regularity
we propose to employ an additional feed table with the ordinary feed or carrying
table; these tables are mounted on different centres and are so placed that the
holes for the nail blanks near the rims of the table overlap one another to allow
the blanks to be pushed out of the holes in the first feeding table into those of the
second or carrying table.
We further propose to employ a resisting spring to the nail stretching portion of
the machine so that in case a blank is not in its correct position the stretching cam
or its equivalent will be relieved by the spring and thus injury to the machine will
be avoided.
A further improvement is applicable when nails of upwards of two inches long
are being inade, our object being to overcome the difficulty experienced of turning
over the nail strip for such long nails in the self feeders of nail making machines.
To overcome this difficulty we roll the strip to the required bevel of the finished
nail, the bevelled strip is then securely placed as usual in the barrel tube or case of
the feeding carrier and fed up automatically to the cutters and cut in the usual
way into parallel blanks ready for the nail making machine.
In employing blanks cut from this improved section of nail strip the usual gauge
must be made with a small lip which in the downward motion of the gauge receives
an accelerated movement from the metal strap or connecting rod the effect of which
is to cause the blank to turn over from its edge to the desired flat side where it
can then receive the usual grip and can be firmly held during the operation of
heading,
Dated this 10th day of April 1891.
H. B. BARLOW,
Agent for Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in the Manufacture of Horse Shoe and other Nails,
and in Machinery therefor.
We, GEORGE HENRY PARKIN, of Stalybridge, in the County of Chester,
Mechanical Engineer, and FRANCIS PRESTON, of Kirkburton, in the County of
York, Civil 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 :-
Our invention relates to the manufacture of nails and particularly to the nail
machine for which Letters Patent No. 14357 of October 22nd, 1887 were granted
to the above named G. H. Parkin.
The first part of our invention relates to mechanism for stopping the machine
automatically when a blank for a mail is inserted the wrong way in the feed table
or so inserted that it cannot readily be pushed from the carrying table, into the
rolls to effect this we employ a clutch on the driving shaft of the machine which
is so connected to the pusher that when a blank through being wrongly placed or
from other cause, cannot readily be forced into the rolls the extra pressure on the
pusher causes a connection to be made with the clutch and so throws it out of gear
and stops the machine instantly before any damage can take place.
In order to feed the blanks to the machine with greater facility and regularity
we propose to employ an additional feed table with the ordinary feed or carrying
table these tables are mounted on different centres and are so placed that the
holes for the nail blanks near the rims of the table overlap one another to allow the
blanks to be pushed out of the holes in the first feeding table into those of the second
or carrying table.
We further propose to employ a resisting spring to the nail stretching portion of
the machine so that in case a blank is not in its correct position the stretching cam
or its equivalent will be relieved by the spring and thus injury to the machine
will be avoided.
And in order that our invention may be fully understood and readily carried into
effect we will describe the accompanying two sheets of drawings in which-
Figure 1 is a front elevation and Fig. 2 a plan of our improved machine for
making horse shoe nails and
Fig. 3 is a plan of part of the gearing.
In these views it will be seen that the frame of the machine is marked 2 and the
ordinary feed or carrying table 3; the table 3 is mounted on the vertical shaft 4
which is driven by gearing not shown from the driving shaft 5; slightly over-
lapping the carrying table 3 is the additional feed table 6 which we employ
according to our present improvements. The feed table 6 has in this case twenty
four holes 7 for the nail blanks which are inserted by hand-in the usual way
while the carrying table 3 has only four such holes as described in the
Specification to Parkin's aforesaid Patent. To feed the carrying table 3 from
the feed table 6 it is therefore necessary to drive the latter at one-sixth the
speed of the carrying table 3 so that one of the holes 7 in the feed table 6
may always at the proper moment be exactly above a hole 8 of the carrying
table 3 when the pusher 9 descends to push a nail blank from the hole into
the hole 8. The feed table 6 is mounted on the vertical shaft 11 and driven
by the spur wheel 12 from a spaced gear on the shaft 4. The pusher 9 is
connected to and operated by a slotted rocking lever 13 fulcrumed at 14 and
actuated by a connecting rod 15 from an eccentric or equivalent, not shown.
A bracket 16 is fixed to the framing 2 and guides the pusher 9 as it moves up
and down.
When the carrying table 3-in its revolution has brought the nail blank above
the pair of stretching rollers 17 the pusher 18 descends to push the nail blank from

page_text: its hole & in the carrying table 3 down into the nip of the rollers 17 by which the
blank is elongated.
In order to prevent any possibility of injury to the machine in the event of a
nail blank jamming through not being in its correct position we arrange two
resisting springs 19 each of which is compressed in a bearing 20 between the cap 21
and the block of the stud 22 upon which is fulcrumed the rocking lever 23 by
which the slide 24 is reciprocated. The pusher 18 is carried by the slide 24 which
is fitted upon a stationary slideway 25 and the lever 23 is rocked by a connecting
rod and strap 26 and an eccentric 27 on a side shaft. 28 which is driven by a pair of
bevel gears 29, 30, the latter being fixed on a shaft 31. The shaft 31 receives its
motion by a spur wheel 32 from a clutch pinion 33 loose on the driving shaft 5, on
a feather key in which is fitted a sliding clutch 34.
The shaft 5 is driven by a pair of fast and loose pulleys 35, 36, and when the
clutch 34 is in gear with the clutch pinion 33 motion is transmitted by the parts
above enumerated to the slide 24 and the pusher 18 moves up and down and at
each descent pushes a nail blank from a hole 8 into the nip of the stretching
rollers 17.
When however a blank gets jammed the extra resistance caused thereby over-
comes the resistance of the springs 19 which yield and allow the fulcrum 22 of the
rocking lever to rise in its bearings 20. This has the effect of raising one end of a
lever 37 which is fulcrumed at 38 and connected to the stud 22 and at the other
end is connected by a rod 39 to an elbow or cam lever 40 fulcrumed at 41. As the
said lever 40 moves it forces outward one end of a bar 42 which is fulcrumed at 43
and at the other end is connected to the grooved boss of the sliding clutch 34 so
that when the bar 42 is operated as described the clutch 34 is drawn out of gear
with the clutch pinion 33 which thus ceases to drive the spur wheel 32 and the
pusher 18 and the other parts of the machine.
To re-start the machine after the jammed nail has been removed a lever 44
fulcrumed at 4 and connected by a rod 46 to the bar 44
ted and the
clutch 34 thrown into gear with the clutch pinion 33.
A further improvement is applicable when ordinary nails of upwards of two
inches long are being made our object being to overcome the difficulty experienced
of turning over the nail strip for such long nails in the self feeders of ordinary mail
making machines.
To overcome this difficulty we roll the strips to the required bevel of the finished
nail, the bevelled strip is then securely placed as usual into clamps and placed into
the barrel tube or casing of the feeder and fed up automatically to the cutters and
cut off in the usual way into parallel blanks and then carried down into the dies by
the movable cutter.
Referring now to Figures 4 and 5 which illustrate the means we employ to
overcome the difficulty above mentioned of turning over the nail strip for long
nails :-
Fig. 4 is a side elevation of part of our improved machine for making ordinary
nails and
Fig. 5 is a detail view of part of the same.
In these views the following parts are substantially of the ordinary construction
and operate in the usual way namely the rocking head 47 which is fulcrumed at 48
to the frame 49 and is rocked by the crank 50 and metal strip 51.
The bevelled section of nail strip 52 indicated by dotted lines is fed forward upon
the stationary cutter 53 to the gauge 54 which with the movable cutter 55 is carried
by the rocking head 47. The gauge 54 has a lip 56 formed upon it the back of the
cutter 55 being slightly recessed to make room for the same and on the gauge 54 is
fixed a block 57 which is supported by two screws 58 which pass excentrically
through two swivel discs or bosses 59 the arms 60 of which are connected by links 61
to the metal strap 51.
Consequently as the rocking head 47 moves forward and the cutter 55 descends
upon and cuts off a nail from the strip 52 and as the gauge 54 by means of the links 61,

page_text: arms 60 and excentric bosses 59 receives an accelerated movement the lip 56 turns
the blank a quarter turn over that is to say from its edge to its flat side in which
position it is gripped and squeezed by the pair of dies 62 and 63 and firmly held
during the operation of heading.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. In a horse shoe nail making machine of the type specified, the arrangement
use and application of an automatic stop motion in connection with the pusher 18
whereby when a blank becomes jammed and cannot readily be forced from the
carrying table into the stretching rollers a connection from the pusher throws the
driving clutch out of gear and instantly stops the machine substantially as herein
set forth.
2. The combination with the pusher 18, and the connections for operating the
same, of the resisting springs 19, and the connections for throwing the driving
clutch out of gear substantially as herein set forth.
3. The combination with the carrying table, of the additional feed table arranged
and operating substantially as herein set forth.
4. In an ordinary nail making machine we claim mechanism for giving an
accelerated downward movement to the gauge in order that a lip thereon may turn
over the blank cut from a strip of the bevelled section described into position ready
for the heading dies substantially as herein set forth.
5. The several combinations and arrangements of parts embodying our improve-
ments in machines for the manufacture of horse shoe and other nails substantially
as herein described and as illustrated by the drawing annexed.
Dated this 12th day of November 1891.
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicants.
H. B. BARLOW,
17, St. Ann's Square, Manchester, Agent for Applicants.