Improvements in Guards for Gear Wheels.
Year: 1895

page_text: Date of Application, 15th Oct., 1895
Complete Specification Left, 8th July, 1896-Accepted, 8th Aug., 1896
PROVISIONAL DI NOTEICATION
Improvements in Guards for Gear Wheels.
1, JAMES BARBOUR, of Falls Foundry, Belfast, Ireland, Machinist, do hereby
declare the nature of this invention to be as follows:—
This invention relates to improvements in wheel guards or safety covers for
toothed wheels, the object being to ensure an efficient guard, less costly to produce,
and more simple in its construction than heretofore. The invention consists of a
combined wheel guard and concentric boss, the latter serving the double purpose
of supporting the guard or cover and shaft, and at the same time keeping the wheel
in position.
According to this invention, I employ a flanged cover corresponding in size to
the size of the wheel to which it is to be applied; the cover has a concentric boss
which fits onto the stud or axis of the wheel, and is secured thereon by a pin or
set screw, and thus serves to keep the wheel in position when the stud or axis is
stationary. When the wheel is on a revolving shaft, the latter passes through a
concentric boss, and the guard or cover is secured to some fixed part by means of
lugs or feet cast to the guard or cover, and in this case, the concentric boss may
be bushed, so as to act as a support for the shaft.
The flanges of the guards or covers are cut away at the points, where it is
desired adjoining wheels should gear together.
11905
I, JAMES BARBOUR, of Falls Foundry, Belfast, Ireland, Machinist, 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 :-
This invention relates to improvements in wheel guards or safety covers for
toothed wheels, the object being to ensure an efficient guard, less costly to produce
and more simple in its construction than heretofore. The invention consists of a
combined wheel guard and concentric boss, the latter serving the double purpose
of supporting the guard or cover and shaft, and at the same time keeping the
wheel in position.
:
According to this invention, I employ a flanged cover corresponding in size to
the size of the wheel to which it is to be applied the cover has a concentric
boss, which fits onto the stud or axis of the wheel, and is secured thercon by a
pin or set screw, and thus serves to keep the wheel in position when the stud or
axis is stationary. When the wheel is on a revolving shaft, the latter passes
through a concentric boss, and the guard or cover is secured to some fixed part

page_text: by means of lugs or feet cast to the guard or cover, and in this case the concentric
boss may be bushed, so as to act as a support for the shaft.
The flanges of the guards or covers are cut away at the points where it is desired
adjoining wheels should genr together.
Such being the nature and object of my said invention, the following is a
complete description of same, reference being had to the accompanying drawings,
in which
Fig. 1 is a front elevation of a train of four wheels protected by the improved
guards shewn in the various forms applicable to the different wheels.
Fig. 2 is a side sectional elevation of Fig. 1.
According to this invention and referring specially to the wheel 1 shewn in the
annexed drawings, I employ for this wheel 1 a flanged guard or cover 2, slightly
larger in size than the wheel 1, to which it is applied on the inner side, i.e. between
the wheel and the frame 4. Cast to or forming a part of the guard or cover 2, is
the concentric boss 3, which is received in a hole or recess in the frame 4, and
secured thereto by set screws or bults 5, 5. This guard or cover 2 thus practically
forms a part of the frame 4, and the concentric boss 3 serves as a support or
bearing in which the shaft 6 revolves, the wheel 1 being keyed on the latter in the
ordinary manner.
The wheels 7 and are carriers revolving on studs 10, 10, and these wheels
are protected by flanged guards or covers 9, 9. applied to the outside of same.
The flanged guards or covers 9, 9 have concentric bosses 3*, 3, in which are
received the studs 10, 10, so that the studs 10, 10 serve to carry the guards or
covers, and the busses 3, 3 of the latter keep the wheels 7, in their correct
positions on the studs 10, 10, the bosses 3 3 being fixed onto the stationary
Studs by set screws 11, 11.
The wheel 12 is shewn as protected by a similar guard or cover to the wheels 7, 8,
but this guard or cover is made to act not only as a guard or cover for the
wheel 12, but its concentric boss 3 acts also as a support or hearing for the
revolving shaft 13, the end of which is received in the bushed concentric boss 3*.
The wheel 12 is keyed onto the shaft 13 and the guard or cover is maintained in
position by the lugs or feet 14, which are secured to the frame 4 by set screws
or bolts 15.
The flanged guards or covers are cut away at the points where two adjoining
wheels gear together, as at 16, 16, so that the wheels are protected, and the
guards occupy very little space.
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. The improved wheel guards or covers as herein described, and substantially
as illustrated by the accompanying drawings.
2. A guard having a concentric boss combined with a supporting stud or shaft
in or through the said boss, as herein described, and substantially as illustrated
by the annexed drawings.
Dated this 7th day of Jul. 180C