IMPROVEMENTS IN WHEELS FOR COLLIERY CORVES AND OTHER PURPOSES, AND IN SECURING THE SAID WHEELS TO THEIR AXLES, AND IN APPLIANCES CONNECTED THEREWITH
Year: 1880

page_text: PROVISIONAL SPECIFICATION left by Joseph Trippett and Thomas Walton
at the Office of the Commissioners of Patents on the 30th December 1880.
JOSEPH TRIPPETT and THOMAS WALTON, both of Sheffield, in the County of
York. "IMPROVEMENTS IN WHEELS FOR COLLIERY CORVES AND OTHER PURPOSES,
AND IN SECURING THE SAID WHEELS TO THEIR AXLES, AND IN APPLIANCES
CONNECTED THEREWITH."
This Invention relates to improvements in what are termed "self lubricating"
wheels, and is applicable to wheels for colliery corves, trams, or hutches, and other
similar wheels.
This Invention consists in the construction of a hollow bossed wheel with, firstly,
two internal bushes which are fitted tightly into the hollow boss of the wheel, one
on each side thereof, the said bushes bearing on the axle, and being so constructed
and fitted as that they can be readily displaced and replaced by new ones when
worn by the rotation therein of the axle; and, secondly, a perforated cylinder or
cover extending over and fitting onto the outside of the two bushes aforesaid,
through which said perforations the oil (or other lubricant) in the hollow boss
passes slowly to the axle aforesaid.
In carrying into effect our Invention, the wheel will be recessed in the boss
thereof, and one bush can be driven or otherwise secured into one side thereof; the
perforated cylinder can then be inserted in the hollow boss over the said bush, and
the second bush can then be driven into or secured in the opposite side of the said
boss. The bushes can be bored to fit smoothly onto the axle. The hollow boss
will be perforated for the purpose of filling it with oil, and the said perforation
will have a plug or similar device to retain the oil in the hollow boss. The
bushes and wheels can be made interchangeable, so that any bush will fit any
wheel. Wheels made according to our Invention will be more durable than
wheels of ordinary construction.
As a modification, where two bushes are employed, they can be so constructed
and fitted into the hollow boss as to form practically a continuous bearing, the said
bushes extending into the hollow boss until within, say, one fourth part of one inch
of one another, the said bushes being grooved from their inner ends to allow the
lubricant to pass to the axle. The space between the said bushes can have a
perforated cover through which the lubricant will pass to the axle or otherwise.
As a further modification, and for use with hollow bossed wheels, one bush only
is employed, the form thereof being circular in cross section, or hexagon, octagon,

page_text: or other convenient form on the outside thereof, and being bored to fit the axle,
the hole in the boss of the wheel being of the same form as the outside of the bush;
the bush will have a projecting collar at one end thereof which will bear up against
the face of the wheel boss. The bush will have perforations in or about the centre
of its length through which the lubricant contained in the hollow boss will pass to
the axle; in fitting this bush into the wheel, the wheel or hollow boss will be
heated and contracted on to the bush, which is inserted in the hole in the said
boss, and the bush can be further secured by a key, set screw, or other similar
appliance.