Year: 1886

page_text: Date of Application, 9th July, 1886.
Complete Left, 12th Apr., 1887,
Complete Accepted, 13th May, 1887.
I THORSTEN NORDENFELT of 53 Parliament Street in the City of Westminster
Civil Engineer do hereby declare the nature of this invention .o be as follows:-—
This Invention has for its object gun mountings so arranged that when the gun has
been laid upon the object by movement about two axes, (one for the elevation or
depression and the other for the lateral traverse) can by the movement of one handle
be set fast and held on the alignment to which it has been brought.
The following construction is suitablo: a vertical axis or spindle forked at its upper
end carries the gun or frame in which the gun is mounted. The axis or spindle is
able to turn in a socket upon a conical base.
The spindle has a shoulder upon it and this rests upon a ring above the top of
the conical base.
The ring is provided with a handle and to lock the gun in position the ring is
partially rotated by means of the handle in an horizontal plane. The ring then lifts
the spindle slightly by means of inclines on its underside operating with corresponding
inclines on the surface beneath it. The spindle at its lower end within the conical
base carries a coned disc or washer which is adjustable upon it and this disc or washer
when the spindle rises is brought against a corresponding surface within the base cone
and so the vertical spindle is set fast. The ring also at the same time lifts a block
which rests upon it and which lies in the base of the fork of the spindle; the block is
thus brought up against a sector fixed to the gun or gun frame and so the horizontal
axis is also set fast.
Sometimes I provide a disc upon the vertical spindle and lock it by a cam piece on
an horizontal axis to which the locking handle is fixed.
At the same time and by the same movement of the handle the gun is prevented
from moving in a vertical plane, for this purpose there is a rod jointed to the breech
of the gun which slides through a socket jointed to the base or support and a cam
piece on the axis of the locking handle clips this rod when the handle is moved. Or
by means of a screw, the rod may be clipped in a split socket and a brake block
simultaneously brought to bear on the periphery of the disc.
Dated this 9th day of July 1886.
CARPMAEL & Co.,
Agents for the Applicant

page_text: Improvements in Gun Mountings.
I, THORSTEN NORDENFELT of 53 Parliament Street in the City of Westminster
Civil 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 :-
According to this invention I so arrange a gun mounting that when the gun has
been laid upon the object by movement about two axes, (one for the elevation or
depression and the other for the lateral traverse) it can by the movement of one
handle be set fast and held on the alignment to which it has been brought.
The following construction is suitable :-a vertical axis or spindle forked at its upper
end carries the gun or frame in which the gun is mounted. The axis or spindle is
able to turn in a socket upon a conical base.
The spindle has a shoulder upon it and this rests upon a ring above the top of the
conical base.
A ring capable of being turned around the shoulder is provided with a handle and
to lock the gun in position the ring is partially rotated by means of the handle in an
horizontal plane. The ring then by means of inclines slightly lifts a block which
rests upon it and which lies in the base of the fork of the spindle; the block is thus
brought up against a sector fixed to the gun or gun frame and so the horizontal axis
is set fast. At the same time the spindle is slightly lifted in its bearing and a coned
disc or washer on its lower end is brought against a corresponding surface within the
base cone and so the vertical spindle is also set fast.
The arrangement is shown in the drawing hereunto annexed.
Figure 1 is a vertical section. Figure 2 a side elevation and Figure 3 a section
through the line A. B. Figure 1.
A is the upper part of a fixed conical base. B a vertical spindle capable of turning
in a socket in the upper part of this cone. B' is a shoulder upon the spindle resting
on a ring C, B is a fork standing upwards from this shoulder it supports the trunnions
of the frame D in which the gun is mounted. E is a loose block resting at the
bottom of the fork. A plan view of this block is shown separately at Figure 4.
D' is a sector on the underside of the frame D, its circumference is V shaped and
enters a corresponding ✓ groove in the block. F is a wedge shaped ring resting on
the top of the ring C-the ends of the loose block E rest upon the top of the ring F.
When the ring F is turned in either direction from the position in which it is
shown in the drawing its thicker side coming below one or other end of the block lifts
the block and forces it against the sector so setting fast the gun trunnions whilst at
the same time the vertical spindle B is somewhat lifted and a friction cone G which is
fast on its lower end is brought into contact with a corresponding friction surface in
the interior of the conical base and the spindle is thereby locked.
The way shewn in the drawings for raising the loose block E by the turning of the
ring F is adapted for guns of small size but for guns of larger dimensions it is

page_text: preferable to causo inclines on the ring to act uniformly on both ends of the block so
as to raise or lower both ends simultaneously.
Other ways than that above described may also be adopted for locking the gun as
for example. I may provide a disc upon the vertical spindle and lock it by a cam
piece on an horizontal axis to which the locking handle is fixed, whilst at the same
time and by the same movement of the handle the gun is prevented from moving in a
vertical plane; for this purpose there may be a rod jointed to the breech of the gun
which slides through a socket jointed to the base or support and a cam piece on the
axis of the locking handle made to clip this rod when the handle is moved. Or by
means of a screw, the rod may be clipped in a split socket and a brake block simul-
taneously brought to bear on the periphery of the disc.
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. The construction of a gun mounting in such a manner that when the gun has
been laid by movement about two axes it can by the movement of one handle be set
fast and held on the alignment.
2. The combination of the vertical pivot B capable of turning in a fixed socket and
carrying the trunnions of the gun (or frame within which the gun is carried) the
sector D¹ the block E the ring F resting upon the top of the socket and formed with
an incline or inclines upon it to raise the block when the ring is turned and cause it
to bear against and lock the sector whilst at the same time it lifts the spindle and
locks it by causing a friction disc fixed upon the spindle to bear against a fixed
surface.