Improved Automatic Feed Device for Rivetting Machines.
Year: 1896

page_text: Date of Application, 14th Aug., 1896-Accepted, 19th Sept., 1896
COMPLETE SPECIFICATION.
Improved Automatic Feed Device for Rivetting Machines.
I, JOSEF TEMLER, of Warsaw, in the Empire of Russia, and 30 to 34, Tabernacle
Street, in the County of London, Manufacturer, 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 :-
The present invention relates to an improvement in the feed device of such
rivetting machines by means whereof sheet metal rivets of the kind shown in
Figs. 1 and 2 of the accompanying drawings are employed for uniting cardboard,
leather, and the like, the rivets being driven into and rivetted over the parts to be
united.
In such machines the feeding of the rivets, i.e. their introduction to the place
where they are used (under the rivetting plunger) is usually done in such manner that
a considerable number of rivets is poured into a dish or receptacle whence a mechanical
contrivance, such as a vibrating mechanism, an oscillating brush or the like moves the
rivets into a channel wherein all the rivets assume the same position. In the said
channel the rivets move onward under the force of gravitation and finally arrive under
the rivetting plunger.
In Fig. 3 of the drawings the simplest form of this construction is shown.
S, is the plunger for driving home and rivetting over the rivets. The plunger is
actuated by a lever : b, is the receptacle for the rivets: k, is the channel
opening from the receptacle, and conducting the rivets under the plunger S.
The device serving to introduce the rivets from the receptacle b, to the channel k, is
omitted in the drawings, partly because it may be made in various well known ways,
and partly because it does not affect the present invention.
All the rivets when touching the bottom of the receptacle will, as soon as they
are free to follow gravitation, lay either on their heads, see Fig. 4, or rest on their
points and the edge of the head as seen in Fig. 5.
Experience has shown that only the last named position allows a sufficient
number of rivets to be passed into the channel.
In that case the rivets are in position in the channel as seen in Fig. 6, that is
to say the edges of their heads touch one another. In this position it frequently
occurs that the edges of the heads of two rivets are pushed one over the other as
shown in Fig. 7. This causes them to jam in the channel and prevents further
movement of the rivets behind these, and then no rivets reach the plunger, and the
machine cannot work.
The object of the present improvements in the feed mechanism is to prevent such
stoppages in the working of the rivetting machine.
The improvement consists in the following:-
The channel k, at the point where it opens into the bottom of receptacle b, has the
shape shown in Fig. 8, corresponding with the position of the rivet shown in Fig. 5.
The channel is continued with the sectional configuration shown in Fig. 9, until it
terminates at the plunger S. Fig. 10 shows the channel seen from the front, the cover
being removed. Fig. 11 is a side view of the same. At its mouth the channel k has a
raised part at the centre, corresponding to that [position of the rivets (see Fig. 5)
in which they are admitted from the receptacle to the channel. The rivets ride on
said central part, the points being guided by the sides of the raised part ¹, as the
dotted lines in Figs. 10 and 11 clearly show. Below, the raised part k³, terminates in
a bevel. Thence forward the channel has the gutter-like or prismatic form shown in

page_text: Fig. 9. The prismatic part in dimensions and configuration corresponds to the
faces of the rivet points.
That side of the prismatic channel k which adjoins the blunt pointed end of
the projection is bevelled off inwardly at k³ as shown in Fig. 10. The other
side of the channel is inclined forward to correspond to the shape of the rivet
points.
The operation of this arrangement is as follows:-
The rivet, which in the position shown in Fig. 5, falls into the channel, when
arriving at the point where the break is, that is to say, at the commencement of the
gutter-like or prismatic portion shown in Fig. 9, meets the inclined surface k of
the channel, this checks the forward movement of the rivet point, whilst the other
point proceeds by reason of the incline at 3 in the channel. The movement is
round the point of the rivet resting on acting as a centre. This movement of
one point of the rivet round the other, causes the rotation of the rivet on its own
axis. This causes the rivet point resting on to be inclined to the surface
supporting it; ultimately this point, moving on k' and assisting the rotary motion of
the rivet, passes into the channel 2. Now both points have reached the prismatic
channel so that each rivet touches the one above and below by the flat sides of its
points as shown in Fig. 11.
In this position the rivets cannot slip one over the other.
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 :-
In the feed channel of a sheet metal rivet machine an arrangement for rotating
the rivets reaching the channel k in the position shown in Fig. 5, so that the
external surface of each rivet-point bears against the like surface of the point of
the rivet next adjoining, the characteristic feature of this arrangement being that
the channel which at its commencement has a raised part k¹ for guiding the rivets,
after a short break assumes the shape of a prismatic channel 2, one side whereof (k)
checks the forward motion of the rivet-point and the other side
causes the other rivet-point to describe a curve round the former
rotated until the point previously checked loses its support on
the channel over the first point, as shown in Figs 10 and 11.
Dated the 14th day of August 1896.
(inclined inwardly)
whereby the rivet is
and finally reaches
NEWNHAM & BROWNE,
Agent for the Applicant.