Improvements in Machines for Inserting Metallic Fastenings.
Year: 1898

page_text: Date of Application, 30th Dec., 1898
Complete Specification Left 30th Sept. 1890 Accented 30th Dec.. 1899
PROVISIONAL SPECIFICATION.
Improvements in Machines for Inserting Metallic Fastenings.
A communication from abroad by MCKAY SHOE MACHINERY COMPANY, of 76,
Lincoln Street, Boston, in the State of Massachusetts, one of the United
States of America.
I, ALFRED GEORGE BROOKES, of 55 and 56, Chancery Lane, in the County of
London, Chartered Patent Agent, do hereby declare the nature of this invention
to be as follows:-
This invention is intended as an improvement on machines for inserting
metallic fastenings, of the class in which the work is presented, to receive the
fastenings, upon a horn which is depressed for a uniform distance after each
fastening has been diven, to free thereby the stock sufficiently to enable it
to be fed over the hoin, but in such machines hitherto, a single pawl has been
employed to lower the hoin, and as its point engages but one of a series of teeth
on a toothed bar attached to a 1od connected with the horn, it has been found
in practice that frequently this pawl will not enter into proper engagement
with a tooth of the end toothed bai, and the tooth will be bioken consequently,
and often several teeth will be stripped thereafter from the bar.
Accordingly, the novel technical problem solved in this present invention is
the provision of a connecting device of which the parts are so constructed as not
to be subject to the breaking and stripping action of the older machines, and
the provision of means to effect the automatic and certain engagement of said
parts with each other, and the disengagement thereof at the proper times
To accomplish this purpose, a novel pawl mechanisin comprising a plate,
having a plurality of teeth, and carrier by parallel links, cooperates with the
toothed bai, the plate being moved on its links by suitable means to engage
with all its teeth a corresponding number of teeth of the toothed bar, the said
plate being automatically disengaged from said toothed bar when the hoin is to
rise again and clamp the work.
The links or levers carrying the toothed plate are mounted on a slide made
adjustable on the carrier, so that as the teeth of the plate wear, in use, the
said plate may be adjusted to compensate for such wear.
The link, its attached pawl canie, the guides in which it slides, the ratchet
toothed rack bar and its connected 1od, may be and are all similar in appearance
and function to well known paits of machines of this class in constant use, and
in practice the said iod will be connected with a lever to effect the loweung of
the usual horn, and the link will be connected with and actuated by a lever, in
well known fashion
In accordance with the present invention, to the carrier is secured by a bolt
a slide block, it entering a suitable groove in the said carrier, and being adjust-
able longitudinally as required by reason of a slot in the block.
This block has pivotted on it two like parallel links, in turn jointed at their
outer ends to suitable ears of a plate, it having a plurality of ratchet shaped

page_text: teeth all of which may be instantly and simultaneously engaged with and dis-
engaged from the ratchet teeth of the bar
The lower guide has a finger or stop, the upper end of which is located in
such position that the lower one of the links meets it when the carrier is put
into its lowered position, the horn being then free to be pressed upwardly against
the stock
When, however, the horn is to be lifted, the carrier is raised, and as the link
leaves the finger or stop, the pressure pin acted upon by a suitable sping acts
to instantly move the parallel links and cause the plate to be quickly moved
toward the ratchet bar to thus engage simultaneously a plurality of said teeth,
the straightening of the links forcing the teeth of the plate firmly into the
notches of the bar and lifting the said bar and its rod
The spring on pin and the stop act one after the other to effect the engage-
ment and then the disengagement of the plate and ratchet toothed bar
As the teeth wear in use, the block may be adjusted
The device described adds very materially to the durability of the machine
The lower end of the plate is located above the shoulder so that there is left
below the said toothed plate just enough space to let it descend and come to a
stop just as the teeth of the said toothed plate come into position to slide fully
into the notches of the teeth of the ratchet bar, this provision ensuring a full,
ather than a partial engagement of the teeth of the toothed plate with the teeth
of the ratchet bar, preparatory to lowering the horn
The teeth of the ratchet bai have the points so located with relation to the
untoothed edge of the said bar, above and below the said teeth, that the points
of the teeth are wholly contained within a line drawn from one to the othei
untoothed part, and the lowermost tooth of the toothed plate is made shorter than
the remaining teeth above it
Locating the points of the ratchet teeth on the 1atchet bar, at the level stated,
enables the lower end of the toothed plate, when the hoin is fully depressed, to
remove the work, or for any other purpose, to silde over on the lower untoothed
part of the ratchet bai, and the teeth at the upper end of the toothed plate are
prevented from engaging and wearing the teeth of the ratchet bar, then opposite
it, and by making the lower-most tooth of the toothed bar shorter than the
remaining teeth, the correct engagement of the toothed surfaces with each other
is ensured, as the end of the toothed bar meets the shoulder preparatory to putting
the said teeth into engagement
The toothed plate may be canied by parallel links, but this invention is not,
in all instances limited solely to the use of such carrying means, as instead, any
other usual or suitable means which will permit both ends of the said toothed
plate to be moved towards and from the ratchet toothed bar in unison may be
employed
COMPLETE SPECIFICATION.
Improvements in Machines for Inserting Metallic Fastenings.
communication from abroad by MCKAY SHOF MACHINERY COMPANY, of 76,
Lincoln Street, Boston, in the State of Massachusetts, one of the United
States of America
I, ALFRED GEORGE BROOKES, of 55 and 56, Chancery Lane, in the County of
ondon, Chartered Patent Agent, do hereby declare the nature of this invention

page_text: and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement:-
This invention is intended as an improvement on machines for inserting
metallic fastenings, of the class in which the work is presented, to receive the
fastenings, upon a horn which is depressed for a uniform distance after each
fastening has been driven, to free thereby the stock sufficiently to enable it
to be fed over the horn, but in such machines hitherto, a single pawl has been
employed to lower the horn, and as its point engages but one of a series of teeth
on a toothed bar attached to a rod connected with the horn, it has been found
in practise that frequently this pawl will not enter into proper engagement
with a tooth of the said toothed bar, and the tooth will be broken consequently,
and often several teeth will be stripped thereafter from the bar.
Accordingly, the novel technical problem solved in this present invention 18
the provision of a connecting device of which the parts are so constructed as not
to be subject to the breaking and stripping action of the older machines, and
the provision of means to effect the automatic and certain engagement of said
parts with each other, and the disengagement thereof at the proper times.
To accomplish this purpose, a novel pawl mechanism comprising a plate,
having a plurality of teeth, and carried by parallel links, cooperates with the
toothed bar, the plate being moved on its links by suitable means to engage
with all its teeth a corresponding number of teeth of the toothed bar, the said
plate being automatically disengaged from said toothed bar when the horn 18 to
rize again and clamp the work.
The links or levers carrying the toothed plate are mounted on a slide made
adjustable on the carrier, so that as the teeth of the plate wear, in use, the
said plate may be adjusted to compensate for such wear.
Fig 1 in side elevation shows a sufficient portion of this part of the mechanism
of a machine for inserting metallic fastenings to enable the invention to be
understood, and
Fig. 2 is a view of the parts shown in Fig 1, looking at it from the right,
the toothed bar being bioken out to show the toothed plate in face view.
Fig 3 18 a detail, to be referred to
The link, its attached pawl carrier, the guides &, in which it slides, the
ratchet toothed rack bar do and its connected rod d are all similar in appearance
and function to well known parts of machines of this class in constant use, and
in practise the rod will be connected with a lever to effect the lowering of the
usual horn, and the link will be connected with and actuated by a lever, in
well known fashion
In accordance with the present invention, to the carrier 18 secured by a
bolt a a slide block a', it entering a suitable groove in the said carrier,
and
being adjustable longitudinally as required by reason of a slot in the blook as
shown by dotted linea
This block has pivotted on it at a two like parallel links a³, in turn jointed
at a at their outer ends to suitable ears of a plate b, it having a plurality of
ratchet shaped teeth 6, all of which may be instantly and simultaneously engaged
with and disengaged from the ratchet teeth of the bar d
The lower guide ds has a finger or stop 62, the upper end of which is located
in such position that the lower one of the links as meets it when the carrier is
put into its lowered position as shown in Fig 1, the horn, not shown, -being
then fiee to be pressed upwardly against the stock.
When, however, the horn is to be lowered, the carrier is raised, and as the
link a leaves the finger or stop, the pressure pino acted upon by a suitable
spring acts to instantly move the parallel links and cause the plate 6 to be
quickly moved toward the ratohet bar to thus engage simultaneously a
plurality of said teeth, the straightening of the links forcing the teeth of the

page_text: plate 6 firmly into the notches of the bar №³ and lifting the said bai and its
rod de
The sping or pin and the stop coact to effect the disengagement and the
engagement of the plate and ratchet toothed bai.
As the teeth wear in use, the block a¹ may be adjusted
The device described adds very materially to the durability of the machine
Viewing Fig 1, where the toothed plate 6 is shown elevated and disengaged
from the teeth of the ratchet bai d³, it will be seen that the lower end of said
toothed plate 18 located above the shoulder, so that there is left below the said
toothed plate just enough space to let it descend and come to a stop just as the
teeth of the said toothed plate come into engagement with the teeth of the
ratchet bar, this provision ensuring a full, rather than a partial engagement of
the teeth of the toothed plate with the teeth of the ratchet bai, preparatory to
lowering the hoin
The teeth of the ratchet ban have their points so located with relation to the
untoothed edge of the said bai, above and below the said teeth, that the points
of the teeth are wholly contained within a line drawn from one to the other
untoothed part, see Fig 3, and the lowermost tooth of the toothed plate b 19
made shorter than the remaining teeth above it
Locating the points of the ratchet teeth on the ratchet bar at the level stated
enables the lower end of the toothed plate, movable with the came after the
horn has been fully depressed in order to enable the work to be removed there-
from or for any other purpose, to slide in the descent of the carrier over and
meet the lower untoothed part of the ratchet bar, and the teeth at the upper
end of the toothed plate are thereby prevented from engaging and wearing the
teeth of the ratchet bar opposite it in its downward movement, and by making
the lowermost teeth of the toothed plate shorter than the remaining teeth above
it, the correct engagement of the toothed sui faces with each other is ensured,
the end of said toothed plate meeting the shoulder e preparatory to putting the
said teeth into engagement, and further the lowermost tooth of the hatchet bar
presents a substantially right angled abutment like the abutment at the upper-
most tooth of the bar so that the lowermost tooth of the plate as it rises against
the smooth part of the bar below the series of teeth therein may enter and thereby
ensure the engagement of the teeth of the plate with the teeth of the bar
I have shown the toothed plate as carried by parallel links, but this invention
18 not, in all instances, limited solely to the use of such carrying means, as
instead, I may employ any other usual or suitable means which will permit
both ends of the said toothed plate to be moved towards and from the ratchet
toothed bar in unison.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed I declare that what
1 claim 18:-
1 In a machine for inserting fastenings, a ratchet toothed bai adapted to be
connected with a horn to lower the same, a vertically reciprocating carrier, a
plate having a plurality of teeth opposed to the teeth of said bar, means to con-
neot said toothed plate and carrier, and means to cause said toothed plate as
said cane is 1aised to engage the teeth of said toothed bar to thereby raise it
and lower the horn, substantially as described
2 In a machine for inserting fastenings, a toothed har adapted to be con-
nected with a horn to automatically and positively lower the same, a carrier,
a plate having a plurality of teeth, a plurality of links to connect said plate with
said cale; guides in which said caner is adapted to be moved vertically.
a stop secured to one of said guides to effect the disengagement of the teeth of
said plate from the teeth of said bar when said caller occupies its lowest posi-
tion; combined with means to move said toothed plate towards said toothed bar,

page_text: in order that its teeth may engage the teeth of said bar and lift the same as the
said caller 18 started in its upward movement, substantially as described.
In a machine for inserting fastenings, a bar adapted to be connected with a
horn to lower the same, said bai having a series of teeth, the points of which
are located below the surface of said bai, a vertically reciprocating carrier, a
plate having a plurality of teeth opposed to the teeth of said bai, the lower
end of said tooth plate engaging the smooth surface of said bar when the horn
18 put into its lowest position by the thickest stock to be used, the said smooth
surface controlling the position of the said plate and preventing the engagement
of the teeth of said plate with the teeth of said bar until the lowermost tooth of
said plate has come opposite a space in the said bar, substantially as described.
4 In a machine for inserting fastenings, a ratchet toothed bar adapted to be
connected with a horn to lower the same, a reciprocating carrier having a
shoulder e, a toothed plate having a plurality of teeth opposed to the teeth of
said bar, the lowermost tooth of the toothed plate being shorter than the teeth
of the said plate above it; links mounted on said carrier and supporting said
plate; a stop to arrest the movements of said plate as the carrier descends to
effect the disengagement of the teeth of the plate from the teeth of the bar, and
means as the caller is raised, to act upon said plate and put its lower end in
contact with the said shoulder, at which time the full and equal engagement
of all the teeth of the plate with the teeth of the bat may be effected, subatan-
tially as described
5 The cariei,
its attached adjustable block a¹, on which are mounted the
links, a toothed plate pivoted on said links, a toothed bar d³, and a spring
pressed pin and a stop finger cooperating with said links, to effect the engage-
ment of the teeth of the plate with the toothed bar, and the disengagement of
said toothed plate from said toothed bai, combined with guides in which said
carrier and said toothed bar are free to slide, substantially as described
6. In a machine for inserting fastenings, a toothed bar adapted to be con-
nected with a horn to automatically and positively lower the same, a plate
having a plurality of teeth and jointed to said carrier by a plurality of links,
guides to receive both the said bai and said carrier, means to cause the toothed
plate to engage the teeth of the bar when the caller is moved in opposition to
the slant of the teeth of the bai to thereby cause the teeth of the toothed plate
to engage the teeth of the bar and lift said bar in unison with said carrier, and
means to disengage the toothed plate from the teeth of the bar when the carrie
eaches substantially its downward position in the said guides, substantially
as described.
ted the 20th day of September 1899
WM. BROOKES & SON,
55 & 56, Chancery Lane, London, Agents for the Applicant.