Improvements in Machines for Forming and Driving Nails.
Year: 1888

page_text: Improvements in Machines for Forming and Driving Nails.
I JONATHAN BOOTHMAN of number sixteen Dantzic Street Manchester in the
county of Lancaster, Boot manufacturer do hereby declare the nature of inven-
my
tion for "IMPROVEMENTS IN MACHINES FOR FORMING AND DRIVING NAILS and in
what manner the same is to be performed to be particularly described and ascertained
in and by the following statement and accompanying drawings:-
My said invention relates to improvements in a machine for forming nails from
wire and driving such nails when formed, for which Her Majesty's Letters Patent
dated January fourth 1881 and bearing the official number 36 were granted unto
Henry Harris Lake.
In the accompanying drawings which reprosent so much of such a machine as is
necessary to show the nature of my said invention.
Fig. 1 is a front elevation.
Fig. 2 is a side elevation, partly in section.
Fig. 3 is a cross section of the device for adjusting the length of the rod ƒ³ herein-
after described.
Fig. 4 is a plan of a part of the feed mechanism hereinafter described.
The letters of reference used hereinafter refer to the letters in the accompanying
drawings.
One part of my said invention relates to the mode of regulating the length of
the nails to be made.
As is fully described in the specification No. 3681 hereinafter referred to the wire is
gripped between the feed lever a and the feed roll band is drawn downwards when
the feed lever a pivoted at c is turned downwards on its pivot by the action of a
swell on the cam disc d which depresses the lever a¹. The lever a' is fixed to the
pivot c.
In the machine as described in the specification No. 36³¹ the upward movement of the
feed lever a is shown as being effected by means of a spring but in the machines as
now usually constructed a curved lever a² also actuated by a swell in the cam disc d

page_text: is used for this purpose. The cam dise d revolves in the direction indicated by the
arrow and as the swell passes upwards it raises the roller and causes the lower end
of the curved lover a to press against a' and so turns the fool lever a backwards.
The curved lever is pivoted at in the levere which can turn on a fixed centre a
in such a manner as to vary the height of the roller a³. The higher the roller a³ is sot 5
the shorter is the duration of its contact with the swell in the cam dise d and as a
consequence the shorter is the backward traverso of the lever a, and since the length
of wire which Дое to form the next nail depends on the backward traverse of the feed
lever a the position of the roller governs the length of the nail to be made.
is
Usually only two lengths of mail are required for each piece of work to he nailed. 1
A rod is commerted at its lower end with a trendl (not shown) of such a construction
that when not subjected to pressure it is held upwards by a spring against a fixed stop;
the end of the triadle to which the rod is attached is then at its lowest point and
consequently the rod, the lever, and the ro'ler on the curved lever a² will be at
their highest points; the index will then point to zero. In the forked end of
mounted a cylindrical nut į which is free to turn on its learings so as to accomodato
itself to the varying inclination of toƒ". The upper end of the rol has a screw-
thread formed thereon and by rotation it by : a finted swell or handle the
lover and through it the roller a can be set in the proper position to give any
required length of nail, the tread remaining meanwhile at its highest point.
When the treadle is depressed the rolries, and through the lever and the
rol the lever and with it the roller a³ are depressed. By means of an adjusting
screw g, working through a projection and provided with a binding screw the
degree to which the lever can be depressed by the treadle is adjustable. With the
foot pressing on the trendle it is evident that the lever is at its lower point and 2
the longer of the two nails for which the machine is set can be made; when the foot
is removed the treadle rises and the lever ascends into the proper position for
making the shorter of the two mails. By means of the index h, fixed to the lever e,
and a graduated scale the machine can be readily set so as to make any desired lengths
of nails instead of having to make experimental nails until the most suitable positions a
are ascertained as has hitherto been the case. A projection on the lever è merely
serves to prevent the feed lever a from being driven upwards to such an extent that
the roller at the end of the lever a' is removed from the action of the cam disc d.
1 make no claim to the mechanism hereinbefore described for actuating the feed
lever a either upwards or downwards and have only described such in order that my 3
invention for regulating the backward movement of the feed lever a may be more
readily understood.
One part of my invention relates however to the surfaces of the foed roll and the.
feed lever a which grip the wire. Instead of using smooth or milled surfaces cut
into the said surfaces ratchet like teeth as shown in Fig. 1 whereby not only is a more
steure grip obtained for the purpose of feeding the wire but the indentations which
such teeth produceo cause the nails to hold more firmly in the leather into which they
are driven. A further part of my invention relates to the mode of attaching iba,
mechanism for feeding forward the work into which the nails are driven. Tho shaft k
on which the cam for operating the cutting mechanism is mounted is continued
downwards and is provided at its extremity with an eccentric the stroke of which
can be varied by means of a sliding block in a wellknown manner and which works
in a slot of the bar m so as to impart a lateral to and fro motion thereto. Immediately.
above the bar m is an eccentric swell a also on the shaft &, which bearing against an
adjustable projection mounted on the bar m imparts a longitudinal to and fro motion 5
thereto. A pivot o fixed to the framing of the machine is provided with a block p
free to turn thereon and fitted in an openended slot in the bar m. A spiral spring
fixed at one and to tho block p and at the other end attached by a pin s to the bar m
draws the bar mekwards as the excentries and a cause to act. By providing tho
bar with an open ended slot and mounting it in the manner described the whole of
the feeding mechanism can be readily removed without removing any part of tho
framing when it is roquisite to substitute another form of feeding mechanism.

page_text: It is requisite that the throat 10, through which the nails are driven into the work
should be suitable for the size and shape of nails being driven, and it is therefore
necessary to be able to substitute one shape of throat for another. To facilitate such
substitution I make the throat w detachable and provide it with a shank a having a
screwthread cut thereon for the purpose of attachment to the cutter box y.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed 1 declare that what I
claim is :-
:-
1. In machines for forming nails from wire and driving the same the use of the
adjusting nut, the adjusting and binding screws g and g¹ and the index h with a
graduated scale for the purpose of regulating and indicating the lengths of the nails
substantially as hereinbefore described and shown.
2. In machines for forming nails from wire and driving the same the use of feeding
surfaces provided with ratchet like teeth substantially as and for the purpose horein-
before described.
3. In nailing machines the use of a feeding bar having an open ended slot, in
combination with the block p the pin o and the spring and pin s, substantially as and
for the purpose hereinbefore described.
4. In nailing machines the use of a detachable throat w having a shanka with a
screwthread thereon for the purpose of attachment to the cutter box y substantially as
and for the purpose hereinbefore described.
JULIUS ALLMANN & Co.,
70, Deansgate, Manchester,
Agents for Applicant.