An Improvement in Bearings for Tramway Trucks.
Year: 1893

page_text: Date of Application, 4th Mar., 1893
Complete Specification Left, 31st Oct., 1893-Accepted, 9th Dec., 1893
PROVISIONAL SPECIFICATION.
An Improvement in Bearings for Tramway Trucks.
I ARTHUR HERBERT WALLIS of North Hants Iron Works, Basingstoke,
Hants, England Engineer do hereby declare the nature of this invention to be as
follows:-
It relates to an improved construction of bearings for tramway, trucks, waggons
and carriages, providing means for the protection of the bearing surfaces from
damage by sand or other injurious substances, and affording a convenient means of
lubrication. I construct two bearings which I place on the axle between the two
wheels and I connect the two bearings by means of a tube of any suitable section,
so that the bearings are only left open at the outer ends. I construct two sliding
pieces which I fit in grooves formed at the outer ends of the bearings, and these
slides have circular holes through them through which the axle passes. These
holes being either made to fit the axle or to fit onto the bosses of the wheels, which
may be made wide enough for the purpose. These slides keep the sand or other
injurious substances from working into the bearings at the outer ends and the tube
connecting the two bearings effects the same purpose for the inner ends.
As a most convenient means of lubrication I provide a chamber under each
bearing provided with a suitable opening for the admission of lubricant, which
opening can be closed by a lid. Beneath each bearing I place a lubricating pad
with wicks arranged to hang down into the lubricant and I hold the lubricating pad
in position by means of a spring.
To facilitate the removal of the bearings when required and when both wheels
are firmly attached to the axles construct the two bearings and the tube
connecting them in two parts, one part being that which comes above the centre of
the axle and the other part that which comes below and I provide suitable means
for attaching the two parts together.
Dated this Third day of March 1893.
COMPLETE SPECIFICATION.
An Improvement in Bearings for Tramway Trucks.
I ARTHUR HERBERT WALLIS North Hants Iron Works Basingstoke Hants
England 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 :-
My invention relates to an improved construction of bearings for tramway trucks,
waggons & carriages providing means for the protection of the bearing surfaces
from damage by sand or other injurious substances & affording a convenient means
of lubrication.
I construct two bearings which I place on the axle between the two wheels & I
connect the two bearings by means of a tube of any suitable section so that the
bearings are only left open at the outer ends.
I construct two sliding pieces which I fit in grooves formed at the outer ends of
the bearings & these slides have circular holes through them through which the
axle passes, these holes being either made to fit the axle or to fit on the bosses of
the wheels which may be made wide enough for the purpose.
As a most convenient means of lubrication I provide a chamber under each
bearing provided with a suitable opening for the admission of lubricant which

page_text: opening can be closed by a lid. Beneath each bearing I place a lubricating pad with
wicks arranged to hang down into the lubricant & I hold the lubricating pad in
position by means of a spring.
To facilitate the removal of the bearings when required & when both wheels are
firmly attached to the axle I construct the two bearings & the tube connecting
them in two parts, one part being that which comes above the centre of the axle &
the other part that which comes below & I provide suitable means for attaching
the two parts together. This is more particularly described by reference to the
drawings Sheets Nos. 1 & 2.
Figure 1 is a vertical longitudinal section and
Figure 2 is a vertical transverse section on the line Y Z.
A represents an axle & B. B. wheels attached to it having bosses C. C. attached.
D is a casting in which the bearings J J are formed and E a casting in which the
oil reservoirs are formed the two castings being jointed together on the centre
line F by the lugs & bolts G thus forming a tube connecting the two bearings
together. HH are slides fitting onto the bosses C. C. the joints being fitted with
pieces of leather I I as shown or in other suitable manner. KK are covers carried
across the top & down the sides of the slides H & also continued to cover the slides
in at the outer sides but having holes for the bosses C. C. to pass through. L Lare
lubricating pads with wicks, attached hanging down into the oil reservoirs; the
pads being held in position by the springs M. M. N N are oil reservoirs connected
together by the passage O. P is an opening through which the lubricant is
inserted & Q a cover for closing same.
In working the bearings are efficiently lubricated by the lubricating pads working
in the ordinary manner & sand & other injurious substances are excluded from the
bearings by the tube connecting the two bearings together & also by the slides at
the outer ends. The reservoirs N N are only partially filled with oil as the
lubricant would run out & get wasted if either reservoir was filled higher than the
lip R. The passage O is placed higher than the bottoms of the reservoirs so that
when one bearing is raised higher than the other the whole of the oil shall not flow
from one reservoir into the other; the oil which still remains below the lip S
remains in the reservoir & the surplus amount of oil only passes across.
•
The following points are self-evident, that instead of employing two castings D & E
bolted together they may be constructed together in one casting when desired, that
the slides H instead of fitting onto. the bosses of the wheels could fit onto the axle
instead, and also that the arrangement can be altered by omitting the passage O
between the two reservoirs.
Having now particularly described & ascertained the nature of my said inven-
tion & in what manner the same is to be performed, I declare that what I
claim is
First. The construction of a tube connecting two self-lubricating bearings
substantially as described.
Second. The construction of a tube connecting two bearings with slides at their
outer ends for the purpose & substantially in the manner described.
Third. The construction of oil reservoirs connected together substantially as
described.
Dated this Thirty-first day of October One thousand eight hundred and