Improvements in Bogie Swivels for Railway Vehicles and Locomotives.
Year: 1896

page_text: Date of Application, 28th Jan., 1896-Accepted, 28th Mar., 1896
COMPLETE SPECIFICATION.
Improvements in Bogie Swivels for Railway Vehicles and
Locomotives.
I JAMES CHARLES MITCHELL, a citizen of the United States of America,
residing at 14 Canal Street in the City of Lewiston, County of Androscoggin, and
State of Maine, one of the United States of America, Gentleman do hereby
declare the nature of this invention, and in what manner the same is to he
performed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to certain new and useful improvements in swivels for
railway cars, locomotives, power trucks, and other vehicles, and it has for its
object the production of a device of this character which will be exceedingly
simple in construction and at the same time possess many advantages in point of
strength and durability.
In carrying out my invention I secure a base plate upon the top surface of the
truck of a car or other vehicle and mount thereon a suitable bearing plate, which
is provided with grooves or recesses for the reception of roller or ball bearings
which are free to move therein. These bearings are prevented from falling out by
a retaining plate provided with slots corresponding to the shape of the grooves or
recesses of said bearing plate, said slots being large enough to allow the bearings
to project therethrough a short distance. The securing plate is designed to fit
within a flange of said bearing plate and is secured in position in any suitable
manner. Dust chambers are also formed in said bearing plate, and the same
communicate with the grooves or recesses thereof. A flange formed on the under-
side of a second bearing plate, which is secured to the vehicle body, is designed to
fit around and be guided by the flange of said base plate.
The invention comprises the details of construction and the combination and
arrangement of parts, substantially as hereinafter fully set forth, and particularly
pointed out in the claims.
In the accompanying drawing-
Figure 1 is a top plan view, the upper bearing plate being removed ;
Figure 2 is a sectional view on the line -, Figure 1 ;
Figure 3 is a bottom plan view of the retaining plate;
Figure 4 is a bottom plan view of the upper bearing plate, and Figure 5 is a
view of a slight modification.
Referring to the drawing, A designates a base-plate which is secured in any
suitable manner upon the top of the truck of any kind of a vehicle. On the base-
plate A is secured the main bearing plate B, which is preferably of rectangular
form and provided with a flange & forming a semi-circular chamber b'. In the
bottom of said chamber are formed four, more or less, semi-circular grooves or
recesses, said grooves or recesses being curved on a plane parallel to the curved
portion of flange b, and are provided with rounded bottom portions which are
designed to form seats for roller or ball bearings, C. In the under side of bearing
plate B are two concentric grooves which are designed to form dust chambers
and communicate with the grooves or recesses at 6. 1 hese dust chambers are
intended to act as conduits for dust and other foreign substances which may get
into the grooves or recesses 2, and they communicate with the outer air at b.
Dis the retaining plate which is of semi-circular form and designed to fit within
the flange b. This plate is provided with slots d corresponding to recesses,

page_text: overhanging flanges or beveled portions d' being formed adjacent said slots, the
same being designed to project over and secure the bearings C in said recesses.
Said bearings are designed to project a short distance through said slots. The
plate D is secured in position by any suitable means, securing rods or bolts d'
being the preferred method.
E is a second bearing plate which is provi led with a flange e, which is designed
to fit around the curved portion of flange band be guided thereby. The under
surface e of said bearing plate rests or bears upon the projecting portions of
bearings C, the pivot rod or bult of the vehicle, and the flange e serving to keep
said bearing plate in its proper position. The pivot rod or bolt e is also passed
through the retaining plate, the main bearing plate and the base-plate.
In Figure 5 I have shown a slight modification of my invention, which consists
solely in making a circular flange F in lien of the flange b. In this form there is
only one series of recesses, f, and one dust chamber, which are arranged in a
plane concentric to the said flange. The retaining plate 2 and the remaining
parts of the device heretofore described are altered to correspond to the fore-
going, and further description thereof is not necessary, since said alterations are
obvious.
The advantages of my invention are apparent, and it will be readily seen that
when my improved swivel is used, the shock or jar caused by the sudden turn of a
car or other vehicle is reduced to a minimum and will be practically overcome.
will also be seen that the same is simple, cheap and durable.
It
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim, is :-
1. In a bogie swivel for vehicles, a base-plate, a main bearing plate secured
thereon having grooves or recesses therein, ball-bearings adapted to work in said
grooves or recesses, dust chambers communicating with said grooves or recesses,
and a second bearing plate designed to rest on said bearings, substantially as set
forth.
2. In a bogie swivel for vehicles, a base plate, a main bearing plate secured
thereon having grooves or recesses therein, ball bearings adapted to work in said
grooves or recesses, a retaining plate for said bearings, dust chambers communicating
with said grooves or recesses, and a second bearing plate designed to rest on said
bearings, substantially as set forth.
3. In a bogie swivel for vehicles, a base-plate, a main bearing plate secured
thereon having grooves or recesses therein, a flange formed on the upper surface of
said bearing plate, ball bearings adapted to work in said grooves or recesses, a
retaining plate surrounded by said flange, dust chambers communicating with said
grooves or recesses, and a second bearing plate designed to rest on said bearings,
substantially as set forth.
4. In a bogie swivel for vehicles, a base-plate, a main bearing plate secured
thereon having grooves or recesses therein, a flange formed on the upper surface of
said bearing plate, ball bearings adapted to work in said grooves or recesses, a
retaining plate, surrounded by said flange and provided with slots corresponding
to said grooves or recesses, dust chambers communicating with said grooves or
recesses, and a second bearing plate designed to rest on said bearings, substantially
as set forth.
5. In a bogie swivel for vehicles, a base plate, a main bearing plate secured
thereon having grooves or recesses therein, a flange formed on the upper surface of
said bearing plate, ball bearings adapted to work in said grooves or recesses, a
retaining plate surrounded by said flange and provided with slots corresponding to
said grooves or recesses, said slots being provided with overhanging portions, dust
chambers communicating with said grooves or recesses, and a second bearing plate
designed to rest on said bearings, substantially as set forth.
6. In a bogie swivel for vehicles, a base-plate, a main bearing plate secured

page_text: thereon having grooves or recesses therein, a flange formed on the upper surface
of said bearing plate, ball bearings adapted to work in said grooves or recesses, a
retaining plate surrounded by said flange and provided with slots corresponding to
said grooves or recesses, said slots being provided with overhanging portions, dust
chambers communicating with said grooves or recesses, and a second bearing plate
provided with a flange adapted to fit around the flange of said first mentioned
bearing plate, substantially as set forth.
7. In a bogie swivel for vehicles, a base-plate, a main bearing plate secured
thereon provided with a semi-circular flange on its upper surface and having
grooves or recesses therein arranged concentric to the curved portion of said flange,
ball bearings adapted to work in said grooves or recesses, a retaining plate surrounded
by said flange and having slots therein corresponding to said grooves or recesses,
dust chambers also arranged concentric to the curved portion of said flange and
communication with said grooves or recesses, and a second bearing plate provided
with a flange adapted to fit around the curved portion of said first mentioned
flange, substantially as set forth.
Dated this 28th day of January 1896.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.