Improvements in Nail Driving Machines for use in the Manufacture of Boots and Shoes.
Year: 1891

page_text: Date of Application, 10th Oct., 1891
Complete Specification Left, 1st July, 1892-Accepted, 3rd Sept., 1892
PROVISIONAL SPECIFICATION.
Improvements in Nail Driving Machines for use in the Manufacture
of Boots and Shoes.
I, GEORGE WARREN COPELAND of Malden, in the County of Middlesex,
and State of Massachusetts, United States of America, do hereby declare the
nature of this invention to be as follows :—
My invention relates to attachments for nailing machines used in the manufacture
of boots and shoes of the kind or class described in the Specification of George
Warren Copeland dated 11th September, A.D. 1888 No. 13,139.
My said invention consists in providing a machine of the class above referred to
with a power-operating mechanism for raising the jack to the tack delivery nozzle,
and which at the proper time actuates the mechanism so that a tack is driven into
the work supported by the jack.
This mechanism is so arranged that a very slight movement of the operator's
foot will cause the machine to perform its function, which is to raise the jack, drive
a tack and then lower the jack to its normal position. One of the principal objects
of this invention is to lighten the work of the operator, who in the machines of
this class now in use is obliged to raise the jack by the foot treadle. For although
in machines in practical use, the jack is balanced by a spring, yet it is easy to see
that in raising the jack many thousand times a day by the use of the foot, con-
sidering the distance the foot has to move as well as the power needed in the
operation, the expenditure of considerable strength is necessary. This expenditure
of strength is largely saved by the use of this invention.
The tack arranging, feeding and driving mechanism is constructed substantially
as described in the Specification of the above mentioned Patent.
In carrying my invention into practice the standard is provided with bracket
bearings which carry the driving shaft of the machine on the outer end of which is
mounted a belt pulley. This pulley is arranged to be rotated continuously and is so
operated by the foot trendle that each depression of the said foot treadle will cause
the shaft and its attachments to make one complete revolution and then stop until
the said treadle has been released and again depressed. This mechanism is common
to other similar machines and is well understood and the pulley may be either a
clutch or a friction pulley and operated as desired.
Upon the shaft is fixed a small cam the roll of which is connected with the lever
which raises the jack by the connecting link.
When this cam is set in motion by depressing the treadle through the first ninety
degrees of a revolution, it raises the jack by the above connections to its full limit,
where it holds the jack during the next one hundred and eighty degrees of the
revolution, and during the remaining ninety degrees of revolution the jack is
lowered to its normal position.
It will be understood that owing to the curves in the bottom of the last, the jack
with the last thereon must be raised to different heights as tacks are driven into
different parts of the upper and insole mounted upon the last. It will be seen that
the mechanism herein described would always raise the jack to a fixed point unless
means were provided for suitable compensation. This compensation is provided for
in the following manner.
The lower part of the jack is constructed as a hollow sleeve and the lower part
of the jack-post is fitted to slide freely in this sleeve and rests upon a compensating
spiral spring which is made of sufficient strength to hold the last properly up against
the nozzle of the tack driver, ready for a tack to be driven into the lowest place in
the bottom of the last at the shank. The spring yields sufficiently to bring every

page_text: other part of the last into sufficiently firm contact with the tack delivery nozzle,
without undue strain upon either the machine or the jack, and so that all the tacks
will be well and securely driven.
Upon the shaft is mounted a large cam which actuates the tack-driving mechanism
during the period of rest of the small cam in the following manner :-Connected
to the roll of the large cam is a sliding connection whose upper end is slotted for
the purpose of guiding it in its vertical reciprocations by the main shaft of the
tack driving mechanism which is mounted upon the upper part of the post. Upon
the main shaft of the tack driving machine outside the sliding connection is loosely
fitted a pinion and attached to the sliding connection is a rack. The path of the
large cam is constructed to give such a throw that when it revolves through ninety
degrees of a revolution it will cause the rack to revolve the pinion one complete
revolution and the next ninety degrees to reverse the same. The hundred and
eighty degrees of motion of the large cam which operates the tack driving
mechanism occur at the period of rest of the same time of the small cam which
operates the jack raising mechanism, so that the jack is always up when the tack is
driven. In order to connect the pinion with the main shaft of the tack driving
machine, there is fixed to the said main shaft a hub provided with one ratchet
tooth, and mounted upon a flange, attached to the said pinion, is a pawl which
engages with the single ratchet tooth of the hub and by means of the above
described connections causes the main shaft of the tack driving machine to make
a revolution during one part of the reciprocation of the sliding connection the other
part of said reciprocation causing the pawl to move backward around the hub
where it is again engaged with the single tooth of the hub ready to again
revolve the main shaft of the tack driver and drive a tack when the treadle is
depressed.
The operation of the improved machine is as follows:-When the treadle is
depressed the shaft makes one revolution during which the cams are raised and
hold the jack firmly against the tack delivering nozzle, from which a tack is then
driven into the work thus presented thereto, the jack then descending to its normal
position, where it remains until the treadle is again depressed.
It will be seen that by operating the tack driving mechanism by the belt pulley
as described in the hereinbefore mentioned Patent, the large cam and its connections
could be omitted and the same result secured by the use of two belts.
Dated this 10th day of October 1891.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Nail Driving Machines for use in the Manufacture
of Boots and Shoes.
I, GEORGE WARREN COPELAND, of Malden, in the County of Middlesex,
State of Massachusetts, United States of America, 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:―
My invention relates to attachments for nailing machines used in the manu-
facture of boots and shoes of the kind or class described in the Specification of
former Letters Patent dated 11th September A.D. 1888 No. 13,139.
My said invention consists in providing a machine of the class above referred to
with a power-operating mechanism for raising the jack to the tack delivery nozzle,
and which at the proper time actuates the mechanism so that a tack is driven into
the work supported by the jack.
This mechanism is so arranged that a very slight movement of the operator's
foot will cause the machine to perform its function, which is to raise the jack, drive

page_text: a tack, and then lower the jack to its normal position. One of the principal objects
of this invention is to lighten the work of the operator, who in the machines of
this class now in use is obliged to raise the jack by the foot treadle. For although
in machines in practical use, the jack is balanced by a spring, yet it is easy to see
that in raising the jack many thousand times a day by the use of the foot, con-
sidering the distance the foot has to move as well as the power needed in the
operation, the expenditure of considerable strength is necessary. This expenditure
of strength is largely saved by the use of this invention.
In the accompanying drawings:-
Figure 1 is a front elevation of a machine to which the improved mechanism is
attached, showing the equalizing spring operating in combination with the jack.
Figure 2 is a side elevation of the same machine, showing the mechanism,
elevating the jack and actuating the tack-driving mechanism.
Figure 3 is a sectional plan of Figure 2 taken below the line X X.
Figures 4 and 5 are elevations of the mechanism which operates the tack driver,
in place of the ordinary driving belt as heretofore shown in connection with said
machines.
The tack arranging, feeding and driving mechanism is constructed substantially
as described in the Specification of the above mentioned Patent.
In carrying my invention into practice the standard is provided with bracket
bearings A¹ which carry the driving shaft A² of the machine to the outer end of
which is arranged a belt pulley A³. This pulley is arranged to be rotated con-
tinuously and is so operated by the foot treadle A that each depression of the said
foot treadle will cause the shaft A' and its attachments to make one complete
revolution and then stop until the said treadle A* has been released and again
depressed. This mechanism is common to other similar machines and is well under-
stood and the pulley A may be either a clutch or a friction pulley and operated as
desired.
Upon the shaft A' is fixed a small cam A' the roll of which is connected with
the lever A' which raises the jack by the connecting link A® Figure 2.
When this cam is set in motion (by depressing the treadle A') through the first
ninety degrees of a revolution, it raises the jack B by the above connections to its
full limit, where it holds the jack during the next one hundred and eighty degrees
of the revolution, and during the remaining ninety degrees of revolution the jack
is lowered to its normal position.
It will be understood that owing to the curves in the bottom of the last, the jack
with the last thereon must be raised to different heights as tacks are driven into
different parts of the upper and insole mounted upon the last. It will be seen that
the mechanism herein described would always raise the jack to a fixed point unless
means were provided for suitable compensation. This compensation is provided for
in the following manner.
The lower part of the jack is constructed as a hollow sleeve B' see Figure 1 and
the lower part of the jack-post B' is fitted to slide freely in this sleeve and rests
upon a compensating spiral spring B' which is made of sufficient strength to hold
the last properly up against the nozzle of the tack driver, ready for a tack to be
driven into the lowest place in the bottom of the last at the shank. The spring
yields sufficiently to bring every other part of the last into sufficiently firm contact
with the tack-delivery nozzle, without undue strain upon either the machine or the
jack, and so that all the tacks will be well and securely driven.
Upon the shaft A' is mounted a large cam C, which actuates the tack-driving
mechanism during the period of rest of the small cam A' in the following manner;
connected to the roll of the large cam C is a sliding connection C¹ whose upper end
is slotted for the purpose of guiding it in its vertical reciprocations by the main
shaft of the tack driving mechanism which is mounted upon the upper part of the
post A, see Figures 4 and 5. Upon the main shaft of the tack-driving machine
outside the sliding connection C is loosely fitted a pinion C and attached to the
sliding connection C¹ is a rack C³. The path of the large cam C is constructed to

page_text: give such a throw that when it revolves through ninety degrees of a revolution it
will cause the rack C³, to revolve the pinion C³, one complete revolution and the
next ninety degrees to reverse the same. The hundred and eighty degrees of
motion of the large cam C which operates the tack driving mechanism occurs at
the period of rest of the same length of time of the small cam A which operates
the jack raising mechanism, so that the jack is always up when the tack is driven.
In order to connect the pinion C with the main shaft of the tack driving machine,
there is fixed to the said main shaft a hub C provided with one ratchet tooth Co.
Attached to the said pinion C is a flange C carrying a pawl C' which engages
with the single ratchet tooth C of the hub C and by means of the above described
connections causes the main shaft of the tack driving machine to make a revolution
during one part of the reciprocation of the sliding connection C³ the other part of
said reciprocation causing the pawl C' to move backward around the hub C where
it is again engaged with the single tooth C' of the hub C4, ready to again revolve
the main shaft of the tack driver and drive. a tack when the treadle A is 1
depressed.
The operation of the improved machine is as follows:-
When the treadle A is depressed the shaft A' makes one revolution during
which the cams A and C cause the jack to rise and hold the latter firmly against
the tack-delivering nozzle, from which a tack is then driven into the work thus
presented thereto, the jack then descending to its normal position, where it remains
until the treadle A is again depressed.
It will be seen that by operating the tack driving mechanism by the belt pulley
as described in the hereinbefore mentioned Patent the large cam C and its con-
nections could be omitted and the same result secured by the use of two belts.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed I declare that what
I claim is :-
1. In a nail-driving-machine for boots and shoes of the class described, the
combination with a jack and mechanism substantially as described for raising the
same, of the compensating spring B³ arranged and operating substantially as shown
and described.
2. In a nail-driving-machine for boots and shoes of the class described, suitable
nail driving mechanism in combination with the jack, the cam A' for raising, holding
and lowering said jack, and suitable connecting and operating mechanism all
arranged and operating substantially as shown and for the purpose set forth.
3. In a nail-driving machine for boots and shoes of the class described, in com-
bination with the nail driving mechanism, the cam C and suitable connecting.
mechanism, whereby said tack driving mechanism is caused to drive a tack at the
proper time into work presented mechanically thereto, substantially as described.
4. In a nail-driving machine for boots and shoes of the class described, the
cams A and C, mounted upon the shaft A' combined with proper pulley mechanism
and provided with the starting treadle A' substantially as described and for the
purposes set forth.
6. In a nail-driving-machine for boots and shoes of the class described, jack
raising mechanism mechanically operated, nail driving mechanism, operating
automatically in combination therewith, and starting mechanism, all operating as
shown and described for the purposes set forth.
Dated this 1st day of July 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.