Improvements in the Manufacture or Construction of Adjustable Swivel Plummer Blocks.
Year: 1899

page_text: Improvements in the Manufacture or Construction of Adjustable
Swivel Plummer Blocks.
We, HARRY ASHTON, Managing Director, and WILLIAM IBBOTSON, Foreman
of Engineers, both of Speedwell Works, Sidney Street, City of Sheffield, do
hereby declare the nature of our invention to be as follows:-
Our invention relates to improvements in the method of manufacturing
adjustable hangers, brackets, pedestals, and like devices for carrying shafting
of various kinds, and has for its object to reduce the first cost and to enable such
appliances to be supplied with greater expedition than heretofore.
It refers more particularly to the method of constructing or manufacturing
the adjustable parts of such appliances, by which various machining processes
are dispensed with.
For example, in applying our invention to a metal hanger for shafting, the
front of the hanger has two projecting bosses through which the upper and lower
adjusting screws have to work, carrying between them the bearing proper for
the shafting to rest in.
In the ordinary method of construction the two said bosses would have to be
bored through in line, and then to be screw threaded to receive the adjusting.
screws, and as such castings are often faulty with blow holes or honeycomb,
there may be great difficulty connected with such operations.
We propose to make separate bushes provided with internal screwthreads to
receive the adjusting screws, and an exterior of such a configuration as may be
desirable.
We make a special core box to enable these bushes to be securely held in line
when they are placed in the mould of the hanger, so that when the hanger is
cast the two bushes are held in position by the surrounding metal ready to
receive the adjusting screws.
Such bushes can be very readily produced ready for use, and kept in stock,
and orders for such hangers can therefore be executed in much less time than
heretofore.
The bearing usually made in halves is held adjustably between the opposite
ends of the screws.

page_text: ·
Improvements in the Manufacture or Construction of Adjustable
Swivel Plummer Blocks.
We, HARRY ASHTON, Managing Director, and WILLIAM IBBOTSON, Foreman
of Engineers, both of Speedwell Works, Sidney Street, City of Sheffield, 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 follow-
ing statement:-
Our invention relates to improvements in the method of manufacturing or
constructing hangers, brackets, pedestals, and like devices with adjustable bear-
ings for carrying shafting of various kinds, and has for its object to reduce the
first cost and to enable such appliances to be supplied with greater expedition
than heretofore.
It refers more particularly to the method of constructing or manufacturing
the adjustable parts of such appliances, by which various machining processes
as now required are dispensed with.
The annexed sheets of drawings illustrate our invention as applied to a hanger,
in which
Fig. 1, represents a side view of the lower portion of a hanger, with the adjust-
able parts in position.
Fig. 2, front view of same, with a portion shown in section to expose the
enclosed parts.
Fig. 3, views of the screwed bush.
Like letters of reference indicate like parts in any of the figures.
In applying our invention in the construction of a hanger for shafting such
as the one shown, for example, the front of the hanger A, is provided with
two projecting bosses B1 and B2, through which the upper and lower adjusting
screws C and D pass, and between the opposite ends of these screws, the bear-
ing E, is held, and through which the shafting passes, and by which it is sup-
ported pivotally.
In the usual method of constructing adjustable bearings it has been necessary
to bore the two bosses B and B in line with each other, and then to screw-
thread such bored holes to receive adjusting screws such as C and D, and this
entails fixing the hanger in a machine and requires a skilled mechanic to carry
out the several operations, and as these castings are very liable to be blown or
honeycombed unseen trouble often occurs.
To avoid employing this skilled labour, and thus reduce the prime cost, we
propose to incorporate with the bosses B1 and B2, previously made, screw-
threaded bushes F, see Fig. 3, by casting the bracket upon them.
These internally screwed bushes are preferably made of some irregular con-
figuration on the exterior (such as that shown) to enable them to be firmly held
by the surrounding solidified metal of the bosses when the bracket is cast, during
which casting process the bushes are held rigidly in line within the mould of
the hanger by means well understood by a practical moulder or iron founder.
When the bushes are so secured in position they are ready to receive the
adjusting screws C and D), which support the bearing E, and by which the bear-
ing is adjusted to the line of the shaft. We prefer to make these adjusting
screws with recessed ends, to engage with projections upon the bearings, upon
which the bearing can turn pivotally for self adjustment.
G¹ and G2 are set screws for fixing the screws C, D, when adjusted, O is an
oil drip cup. Such separately made finished bushes can be very economically

page_text: manufactured, and they can be conveniently kept in stock ready for instant_use
enabling orders for adjustable hangers,-brackets, pedestals or like bearings to be
executed in much shorter time than would otherwise be the case.
Having now particularly described and ascertained the nature of our said in-
vention and in what manner the same is to be performed we declare that what
we claim is:-
1-The improvements in the manufacture of adjustable and swivelling bearings
for shafting (under the generic name of plummer block) consisting of the use
of previously prepared internally screwthreaded bushes F, to receive the holding
and adjusting screws C and D, which are secured in position by casting the metal
of the hanger or like support upon them, as herein before described and set forth.
2-In adjustable bearings for shafting, constructing the screwed bushes for
the adjusting screws to work in, and securing them in position, by causing the
metal of the hanger or the like around the said bushes while they are held in
line, as herein before described.
1000
ROBT. F. DRURY, C.P.A.,
Agent for Applicants,
Bank Buildings, George Street, Sheffield.