Improvements in Shaft Brackets, and in the Method of Manu- facturing such Brackets, and also Plummer Blocks.
Year: 1892

page_text: Date of Application, 24th Feb., 1892
Complete Specification Left, 24th Nov., 1892-Accepted, 28th Jan., 1893
PROVISIONAL SPECIFICATION.
Improvements in Shaft Brackets, and in the Method of Manu-
facturing such Brackets, and also Plummer Blocks.
I, GEORGE RICHARDS, of Suffolk House, Laurence Pountney Hill, London, in
the County of Middlesex, Engineer, do hereby declare the nature of this invention
to be as follows:-
The improvements refer to the design and construction of shaft brackets, and
farther to the method of manufacturing the same.
The shaft brackets belong to that class having adjustable bearings, and consist
of a bearing having portions of its outside at the centre formed as segments of a
sphere. The bearing is entirely surrounded by a casting whose internal face corre-
sponds with the spherical parts of the bearing.
The casting enclosing the bearing has a round stem at one side. This stem is
generally machined and fits into the bracket proper which is bolted to the ceiling,
wall, post, etc., according to circumstances.
The turned stem slides in the bracket for the purpose of aligning the shafts. It
also permits of the bearing and its supports being placed at right angles to the axis
of the brackets. It also permits of interchanging the bearings in different brackets
when they are bored with the same hole.
In manufacturing the parts of the shaft brackets, I cast the circular outside
support of the bearing on a chill, which is of the same diameter as the turned
sphere on the bearing. The chill causes the castings to be all of one size and no
machining process is required. This ring is also cast with parting plates and is
afterwards broken in two parts to admit the bearing. It is finally held together
by two or more bolts.
I employ the same method of chilling the parts of what are known as plummer
blocks which have no adjustinent.
Dated this 23rd day of February 1892.
ALLISON BROS.,
Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in Shaft Brackets, and in the Method of Manu-
facturing such Brackets, and also Plummer Blocks.
I, GEORGE RICHARDS, of Suffolk House, Laurence Pountney Hill, London, in
the County of Middlesex, 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:--
This invention has reference to the construction of shaft brackets with adjustable
bearings. The bearings have an adjustment in a vertical direction, and can also
swivel in any direction to a slight extent. My improvements relate to the method
of constructing the brackets and the arrangement of the parts to produce a sub-
stantial bracket at a low cost of production in manufacturing them in large
numbers. It also relates to the method of using one part of the bracket in a variety
of forms of brackets to suit different applications.
In the accompanying drawings
Fig. 1 is a side view of the shaft bracket complete.
Fig. 2 is a section of the bracket on the line A-B in Fig. 1.
Fig. 3 is an arrangement of shaft bracket for attaching to the wall or a column

page_text: Fig. 4 is another form of a shaft bracket for a shaft passing through a wall at
right angles to the body of the bracket.
Fig. 5 is a section of a sand mould showing the method of "chilling "the interior
surface of the bearing holder.
The main frame of the bracket R is a cored casting and is bored out at a (Figs. 1
and 2) to receive the stem of the bearing holder which is turned and fitted to it.
The stem is clamped by means of the bolt (Figs. 1, 3 and 4), which compresses
the two sides of the frame of the bracket at the side where it is slit for a certain
distance. The bolt d (Figs. 1 and 2) gives the stem a vertical adjustment. The
bearing holder is held together by the bolts e, e, (Fig. 1) after it has been split in
the process of making. The internal surface of the bearing holder 6 is spherical
ath (Fig. 2). This surface his produced in an accurate and cheap manner by
the process of "chilling" the surfaces in the act of casting in the foundry. In
Fig. 5 this process is shown by a section through the sand mould, in which i is the
chill, resting in a recess in the sand at m produced by the core print on the pattern
of the bearing holder b. After the casting is made the part n (Fig. 1) is separated
.at the joint o (Figs. 1, 3 and 4) and the chill removed and used again for other
castings. The external surface of the bearing (Figs. 1, 2 and 4) is turned at p
(Fig. 2) in a lathe in the usual manner, by a spherical turning rest as is well
understood.
S
The spherical portion of the bearing by which it is supported in the holder is a
complete belt entirely surrounding the bearing, and the seat in the holder is
similarly formed; the bearing is thus able to withstand a strain in any direction.
The bearing holder and the stem b, with the bearings (Fig. 2), form an integral
part in themselves that can be used in other forms of shaft brackets, as shown in
Figs. 3 and 4. Fig. 3 is known as a wall bracket, while Fig. 4 is used as a
substitute for the ordinary wall box.
I employ the same method of chilling the parts of what are known as plummer
blocks which have no adjustment.
Having now particularly described and ascertained the nature of the said
invention, and in what manner the same is to be performed, I declare that what
I claim is :-
1. The construction of shaft brackets with adjustable bearings as described and
shown in the accompanying drawings.
2. The method of constructing shaft brackets as shown in Figs. 1, 2, 3 and 4 so
that the shaft bearing with its external holder can be adapted to various forms of
brackets for erection in different positions as shown.
3. The combination of the hearings, having formed on it a spherical belt,
completely surrounding the bearing, which rests in a corresponding seat in the
bearing holder b, the latter having a stem fitting into a bracket which may vary in
form, but which has formed in it a sleeve to receive the said stem, such sleeve
being partially split and having a locking bolt to clamp it together, with a bolt
arranged to adjust the bearing holder 6 in a vertical direction, with regard to the
bracket R, all as described and shown.
4. The method of forming the internal spherical surface of the bearing holder b
by means of a chill in the mould in which such bearing holder is cast, substantially
as specified.
Dated thie 94th day of November 1892
ALLISON BROS.,
Agents for the Applicant.