Improvements in Rivetting Machines.
Year: 1894

page_text: Date of Application, 29th Aug., 1894
Complete Specification Left, 27th May, 1895-Accepted, 29th June, 1895
Improvements in Rivetting Machines.
I, JOSEPH LEVEQUE, of Herstal, in the Kingdom of Belgium, Engineer, do
hereby declare the nature of this invention to be as follows:-
This invention relates to improvements in rivetting machines.
According to my invention the improved rivetting machine is constructed of a
fixed jaw formed of two sheets of steel connected together by cross pieces and of
a movable fork-shaped jaw pivotting on trunnious on the fixed jaw.
The movement of the movable jaw is effected by links both jointed to a pin
which can be operated by means of a screw actuated by a hand wheel or by any
suitable motor. One of the links is connected at one end to a pin fixed to the
fixed jaw and the other link (which has two arms) is connected to another pin
fixed to the movable jaw and adapted to move in slots formed in the cheeks of
the fixed jaw.
On pressure being applied to the first named pin in the direction of the pin on
the fixed jaw it is caused to rise in describing an arc of a circle whereby one of
the links will raise the pin in the slots and thus cause the movable jaw to turn
ou the trunnions so as to raise the anvil which causes the rivet to be compressed
between the anvil and punch, which latter can be raised and lowered by means of
a suitable handle.
Dated the 29th day of August 1894.
G. F. REDFERN & Co.,
4 South Street, Finsbury, London, Agents for the Applicant.
I, JOSEPH LEVEQUE, of Herstal, in the Kingdom of Belgium, Engineer, 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 :-
This invention relates to improvements in rivetting machines.
According to my invention 1 provide the machine with a fork-shaped frame
carrying the lower jaw, the said frame pivoting on trunnions in the frame carrying
the upper jaw and I cause the lower frame to move towards the upper frame by an
arrangement of two links both jointed to a pin, the fixed end of one link and the
movable end of the other link being placed near the line along which force is to be
exerted.
By this arrangement considerable pressure can be exerted on the work to be
rivetted and the pivot on which the two frames are hinged is relieved from pressure
thereby increasing its wearing efficiency. The movable link end moves practically
in a line passing through the work between the two jaws of the machine.

page_text: To enable my invention to be fully understood I will describe the same with
reference to the accompanying drawings, in which :-
Figure 1 is a side elevation of my improved machine adapted to be driven
by hand:
Figure 2 is a similar view of a machine adapted to be driven by power:
Figures 3 and 4 are half sections on the lines A. B and C D of Figure 1
respectively.
A is the fixed frame formed of two metal plates or sheets connected together,
and B is the fork-shaped lower frame pivotted at F to the fixed frame A. The
movement of the frame B is effected by the links E G and D G which are both
jointed to the pin G. The pin G receives its motion either, as shewn in Figure 1,
from a screw actuated by a wheel operated by hand or by a dynamo machine or
by any other suitable means or, as shewn in Figure 2, from a steam compressed air
or water pressure engine W by connecting the piston rod of the same to the pin G
by means of a connecting rod.
The lower end of the link D G is pivoted at D to the fixed frame A whilst
the lower end of the link E G which is double is pivoted to a pin E fixed to
the lower frame B, the said pin working in slots I in the sides or plates of the
frame A.
It is obvious that when pressure is applied to the pin G it will be forced forward
and will move in an arc of a circle whereby the double link E G raises the pin E
so that the latter slides upwards in the slots 1. By this means the frame B is
caused to turn on the pin F and the lower jaw H is raised with sufficient force to
rivet the work placed between it and the upper jaw C of the machine.
The jaw C can be raised and lowered by a handle M.
When operating the machine by hand a special workman is required for
turning the wheel Q whereas when driving the machine by a compressed air, water
or steam engine, one workman is sufficient as all that it is necessary to do, when a
rivet has been operated upon, is to open the water, air or steam valve by means of
the lever T.
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 rivetting machine in which a forked frame carrying the lower jaw is
hinged to a fixed pivot between the plates of the upper frame which carries
the upper jaw, placing the fixed end of one link and the movable end of a
second link (such as D G and E G) which serve to effect the movement of the
jaws towards one another, near the line along which force is to be exerted,
for the purpose of obtaining an efficient pressure on the rivet and of relieving
the pivot on which the two frames are hinged from pressure, substantially as
described.
2. The manufacture and use of the improved machine hereinbefore described and
¡llustrated in Figures 1 and 2 of the drawings.
Dated this 97th don of M... 1005
G. F. REDFERN & Co.,
4, South Street, Finsbury, London, Agents for the Applicant.