Improvements in Machines for the Manufacture of Bolts and Rivets.
Year: 1891

page_text: Date of Application, 15th Apr., 1891-Accepted, 16th May, 1891
COMPLETE SPECIFICATION.
Improvements in Machines for the Manufacture of Bolts and
Rivets.
I, ALFRED BARON RITTER, Manufacturer, of Schallegg, in the German
Empire, do hereby declare the nature of my 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 has for its object, to construct rivet and bolt making
machines which combine simplicity with great capacity of production.
In the following description reference will be made to the accompanying
drawings, Figs. 1 to 7, which represent a machine embodying my invention,
Fig. 1 being a side elevation,
Fig. 2 a plan,
Fig. 3 an end elevation,
Fig. 4 a vertical transverse section, and
Figs. 5-7 detail views.
The machine is set in motion by a belt pulley a mounted on the driving shaft 6
and serving at the same time as a fly-wheel.
The shaft carries also a bevel wheel e adapted to set in motion the bevel
wheel c', and thereby the spur wheels and e². On the shaft of the wheel c³ is
mounted a disc d carrying a pin d' which during its revolution meets the recessed
parte of the disc e and imparts to the latter periodically a partial rotation around
its axis.
As the convex part of of the disc d has the same radius, as the concave
part of the disc e, the former slides in the latter and causes the matrix disc to
stop, during which time all operations such as the feeding, pressing and ejecting of
the rivet, may be accomplished.
The disc e is connected with the matrix disc f, which has as many matrices, as
there are recesses in the disc e, consequently, the disc is propelled each time for the
distance of a matrix. The introduction or feed motion of the red-hot bar g of
round iron is effected automatically by the intermittently moving disc and the
roller, loaded with an adjustable weight 2. The motion of the roller is
produced by the shaft w, which in its turn receives motion from the bevel wheels rr',
propelled by means of the shaft c, angle lever ', ratchet pawl and ratchet
wheel'. The rod operated by the shaft & may be adjusted on one arm of the
bell crank lever te¹, so as to increase or reduce its stroke and the motion of the
wheel produced by the ratchet pawl.
The disc carries the iron bar up to the adjustable stop g', where it is cut off to
the required length by the knife 1. This knife which, as, well as the block P, has a
form corresponding to that of the iron rod, is fixed to the bell crank lever which
is driven by the rod n' and crank n² operated by the shaft b. The piece of metal
cut off is, by means of the guide and the lever k, conducted on the adjustable
bed and against the tappet, where it falls exactly in front of the matrix. The
lever is held in position by the spring, but is forced back, when the iron bar
projecting from the matrix moves on with the disc. The piece of iron is pressed
into the matrix by the bolt y moved by the lever 01), o¹ In order, that the lever o
may yield, when required, it is secured to the lever o by a joint, allowing it to
move against the spring o² which keeps the lever o in position. The lever o o' is
worked by the rod o and a cam fixed to shaft b.
The revolution of the disc brings the rivet in front of the stamp or die m',
which is fixed on the slide m, and the head of the rivet is then formed by the
pressure of the die.
The slide is operated by the knuckle lever s, joined to the main shaft by means

page_text: of the crank and connecting rod s¹. Instead of being rigidly fixed at, the
lever is connected with the lever p, so as to allow the necessary amount of free
play, and the lower end of p is held by a volute spring p', or other suitable elastic
contrivance, or by a weight. The spring can be held in tension by the nut p², in
order that the stamp or die may apply the necessary pressure. In the disc the
rivets meet pins which abut against an eccentric strap moving round an
eccentric during the revolution of the di-c. This eccentric is so placed, that the
pin situated on the side diametrically opposite to the die, is forced outwards with
the rivet. The forked end of the lever then takes hold of the rivet below the
head of the latter, and, receiving its motion from the rod o³, eject the rivet.
To enable the eccentric to be so set, that the pins may propel either longer
or shorter rivets, it is made adjustable, and provided with a toothed segment .c',
gearing with a worm, which can be turned by hand, thus allowing the eccentric
to be placed at any desired angle. The strap serves to prevent frictional contact
between the bolts y and the eccentric .r.
Having now particularly described and ascertained my invention and in what
manner the same is to be performed, I declare that I claim;
In a machine for the manufacture of bolts and rivets ;
1. The feed mechanism for the iron, comprising the disc h, lever w', ratchet pawl =
and the adjustable rod w driven by the main shaft b, substantially as described.
2. An adjustable bed, and tappets, in combination with an adjustable lever k
held by a spring k¹ adapted to guide the cut metal before the mouth of the matrix
and to recede, when the latter continues its motion, substantially as described.
3. The means for imparting an intermittent motion to the matrix disc and
arresting the same, when required, chiefly comprising a single tooth wheel d and a
wheele having recesses and concave faces, substantially as described.
4. The device for introducing the iron into the disc, after it has been cut off,
comprising a bolt y, spring levers o o' and rod o set in motion by the shaft b, substan-
tially as described.
5. The means for setting in motion the slide m, comprising a joint levers, lever p
and spring p', substantially as described.
Dated this 15th day of April 1891
ALFRED BARON RITTER.
By Fairfax & Wetter,
433, Strand, London, Agents.