New or Improved Trunnion Bearings for Ordnance.
Year: 1899

page_text: Date of Application, 6th July, 1899
Complete Specification Left, 22nd Mar., 1900-Accepted, 28th Apr., 1900
PROVISIONAL SPECIFICATION.
New or Improved Trunnion Bearings for Ordnance.
I, AUGUST REICHWALD, of 9, New Broad Street, in the City of London, Steel,
Iron, Metal and Mineral Merchant, do hereby declare the nature of this invention
(a communication to me from abroad by the Firm of Fried: Krupp, of Essen, in
the Empire of Germany, Cast Steel Manufacturers), to, be as follows:-
The present invention relates to trunnion bearings for that class of orduance,
which necessitates the gun being drawn out of the trunnion bearings in a backward
direction, instead of being lifted out.
In orduance of this class the trunnion bearings are closed at their rear, by a
renovable cover which has to bear the whole of the recoil on explosion, and, is
consequently liable to be wrenched off.
This invention therefore has for its object to prevent the bearing covers from
being wrenched off, by providing both the bearings, and their covers, with lateral
projections, and securing them together by plates having openings therein, to
receive and embrace the projections, said plates being removably secured to the
body of the bearings.
Each trunnion bearing is composed of the body, the cover, two retaining plates,
and bolts and nuts for securing them in place. The body of the bearing is
integral with the wall of the gun carriage, and is open towards the breech end
of the gun, and is closed by a cover slidden into place laterally. On either side of
the bearing is an annular ring or collar, formed partly on the body of the bear-
ing, and partly upon the cover. Each of these rings receives a keeper plate,
pierced with an opening corresponding in diameter to that of the rings, and these
keeper plates are secured by means of screw bolts to the body of the bearings.
The trunnions of the gun have shoulders formed upon them, corresponding in
depth and diameter to the bearing collars, so that the keeper plates on the inside
of the bearings may be slidden off the collars onto these shoulders..
To mount the gun in its bearings, a keeper plate is first pushed onto cach
shoulder of the trunnions, and the trunnions then guided into the openings at the
back of the bearings. The bearing covers are next pushed into the body of the
bearings from the sides, and all the keeper plates placed over the collars.
tightening up the bolts the bearings will be securely closed down..
On
To remove the gun from its bearings, the above series of operations is simply
reversed:

page_text: ох аргoveu Датов дег от огалапсе.
1, AUGUST REICHWALD, of 9, New Broad Street, in the City of London, Steel,
Iron, Metal and Mineral Merchant, do hereby declare the nature of this invention
(a communication to me from abroad by the Firm of Fried: Krupp, of Essen, in
the Empire of Germany, Cast Steel Manufacturers), and in what manner the same
is to be performed to be particularly described and ascertained in and by the
following statement:―
il
The present invention relates to a trunnion bearing for orduance, of that class
in which the gun has to be drawn out backwards from its trunnion bearings
without being lifted, the trunnion bearings being for this purpose closed by
removable cover at their rear. As these latter when the gun is fired have to bear
the whole of the recoil, it is desirable, in order to prevent the covers from being
wrenched off, that the recoil shall be transferred as completely as possible from
the bearing covers to the body of the bearing or to the gun carriage itself, and
the bearing cover be thus secured to the greatest possible extent.
According to the present invention this object is attained by providing the
covers and the bodies of the bearings, with lateral projections, and securing them
together by retaining plates which surround the said projections, the plates being
pierced with similarly shaped openings,, and being removably secured to the body
of the bearings.
The accompanying drawings illustrate an example of the invention.
Fig. 1 shows both trunnion bearings looking from the rear, the left hand bear-
ing being in section, and the riglit hand one in elevation with the plates detached
and partly in section.
Fig. 2 is a side view of the left hand bearing.
Fig. 3 is a side view corresponding to Fig. 2, the retaining plates and bearing
cover having been removed.
Fig. 4 is a front view of the cover and Fig. 5 a side view thereof.
The bearings for both the trunnions b of the barrel or cradle of the gun c, are
precisely similar in construction. Each consists of the body part 4, the cover d,
The retaining plates and the locking screws i.
The body a of the bearing which is integral with the gun carriage, is open
towards the breech end of the gun, and is closed by means of the cover d (Fig. 2).
The top and bottom edges of the cover are shouldered at e, and the opening in
the body of the bearing is similarly shaped, so that the cover cannot be drawn out
towards the breech end of the gun, but must be slidden laterally in and out of
place. The bearing is surrounded on either side by an annular laterally project-
ing collar, which is formed partly of the portion g on the body of the bearing,
and partly of the portion f on the bearing cover d. Both trunnions are also
turned down at & to the diameter and height of the collar fg.
When it is desired to place the gun in its bearings, the plates are first
slipped onto the shoulder of the trunnions, and then the latter guided into the
rear openings in the body a of the bearing (see Fig. 3). When the cover d has
been pushed into the body of the bearing from the side (see Fig. 1, right half)
and the retaining plates hh placed upon the collars fg, the locking screws are
inserted and drawn up, thus securely closing down the bearing (see Fig. 1 left
half, and Fig. 2).
reverse way.
The removal of the gun from its bearings is effected in exactly the
As will be seen without further description, the retaining plates h h, by means
of the collar fg, transfer the recoil exerted upon the bearing cover d, when the

page_text: gun is fired, completely to the body of the bearing or to the gun carriage, while
They simultaneously take the load off the shoulders c.
Furthermore as the major portion of the cover of the bearings lies against the
plates, these latter prevent any appreciable bending stresses from being exerted
ou the bearing covers.
It is not absolutely necessary that the bearing covers be furnished with the
shoulders e, as the plates halone are sufficient to transfer the recoil to the
carriage. Moreover without departing from the invention the collar fg may be
formed upon one side only of the bearing and only one plate employed for each.
Finally the exact forni of collar fg is not an essential feature of the invention.
It might equally well be replaced by projections or lugs of any desired form.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed I declare that what I
claim is:-
:-
1. A trunnion bearing for ordnance, in which the bearing cover and the body
of the bearing, or the carriage, are provided with lateral projections, and, are
held together by plates furnished with correspondingly shaped openings to receive
and surround said projections and removably secured to the gun carriage, sub-
stantially as set forth."
2. The construction and arrangement of trunnion bearings for ordnance, sub-
stantially as described with reference to the accompanying drawings.
J7RICU THI
VI
BREWER & SON,
London & Leeds, Agents for the Applicant.
BREWER & SON,
London & Leeds, Agents for the Applicant.