IMPROVEMENTS IN PLUMMER BLOCKS AND OTHER BEARINGS
Year: 1879

page_text: LETTERS PATENT to Benjamin Hewitt, of Birmingham, in the County of
Warwick, Pattern Maker, for the Invention of "IMPROVEMENTS IN PLUMMER
BLOCKS AND OTHER BEARINGS."
Sealed the 15th July 1879, and dated the 18th February 1879.
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PROVISIONAL SPECIFICATION left by the said Benjamin Hewitt at the
Office of the Commissioners of Patents on the 18th February 1879.
BENJAMIN HEWITT, of Birmingham, in the County of Warwick, Pattern Maker.'
"IMPROVEMENTS IN PLUMMER BLOCKS AND OTHER BEARINGS."
This Invention relates to improved means of adjusting the brasses or bearings in
any other metal or other material in the block by which the shaft is supported so
as to obtain a proper bed or seating for the shaft to run in without disturbing or
packing the block itself, and as to be able to raise or lower the bearings as the
shaft may require through wear or other causes, and to facilitate the fixing of
shafting to run truly with a proper bedding on the shaft both vertically and
horizontally.
The method of obtaining these advantages is as follows:-The block is constructed
in a hollow form to allow of adjusting pieces being passed through and on which
the brasses or bearings rest. At the bottom of the block is cast an inclined
plane or piece of metal, the top part of the block though being open to
admit of the shaft passing through is constructed in an angular form
corresponding with the said inclined plane on the bottom and made
with solid ends forming a bed for the top adjusting piece or gland. Upon the.
inclined plane at the bottom of the block is fitted an adjusting piece for the brans
or bearing to rest upon, and which is movable and made to slide upon the inclined
plane by a pin which runs through the side of the block and is made secure by a
nut. By unscrewing or screwing up the nut the adjusting piece is made to slide
backwards or forwards upon the bed at the bottom of the block, and being in the
shape of an inclined plane raises or lowers the brasses or bearings as may be
required. The adjusting piece at the top is also made in a similar manner. The.

page_text: bottom adjusting piece is made hollow, the brass or bearing itself being made
round on the top to allow it to swivel and bed itself to the shaft, the bottom part of
the top adjusting piece is also made hollow, which allows the top brass or bearing
to swivel with the bottom one, and so retains the brass or bearing in its proper
position in the block and allows it to move in any horizontal position on the shaft
that may be required; by these means the brasses or bearings are always kept
truly and evenly to the shaft and the shaft may always be kept running in the best
position.
The above described improvements are applicable to all purposes where similar
adjustments are needed.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Benjamin Hewitt in the Great Seal Patent Office on the 25th July
1879.
BENJAMIN HEWITT, of Birmingham, in the County of Warwick, Pattern maker.
"IMPROVEMENTS IN PLUMMER-BLOCKS AND OTHER BEARINGS."
This Invention which relates to certain improvements in plummer-blocks and other
bearings for machinery has especial reference to improved means of adjusting the
" brasses »
or bearing-collars by which the shafting is supported in the block so as
to keep the same at all times true and parallel with the shafting, and to obtain a
proper bed or seating for the shafting to revolve in without disturbing or packing
the block itself; and so as to be able to raise or lower the bearings as the shafting
may require through wear or other causes, and to facilitate the fitting of shafting to
run truly both vertically and horizontally.
The Invention consists in constructing the plummer blocks 1 with upper and
lower inclined surfaces 2 against which bear wedge shaped adjusting pieces 3,
between which the brasses or bearings 4 for supporting the shafting are placed.
The top of the block 1 is made open at the part 5 (as shewn in Figures 1 and 2) to
admit of the shafting being placed in position between the brasses, and the inclines
2 are formed by hollowing out the block transversely of the direction or line of the
shafting, as shown best in Figure 2. Each adjusting piece 3 is made or fitted with
a screwed pin or extension 6, and its position is shifted and determined as desired
by means of a nut 7 thereon; upon turning the nuts the pieces 3 are caused to
move towards or away from them and thus to raise or lower the brasses or bearings
as may be required. Each piece 3 is slightly bollowed out on its inner sido (as
shewn in Figure 3) and the brasses or bearings 4 (see Figure 4) against which the
pieces 3 bear are formed to a similar contour, as shewn in Figure 5, by which means
they have such freedom of movement as will ensure them keeping at all times true
and parallel with the shafting, the latter at all times running truly, and being thus
subjected to a minimum amount of friction.
The above described improvements are applicable to all purposes in connection
with machinery or other apparatus whore similar adjustments are needed.

page_text: Having now described the nature and object of my said Invention, together with
the manner in which the same is to be or may be performed or carried into practical
effect, I would remark in conclusion that I claim as my Invention,-
The novel and peculiar construction of plummer-blocks and other bearings with
through recesses having upper and lower inclined and opposing faces against which
bear wedge-shaped adjusting pieces between which the brasses or bearings for sup-
porting the shafting are placed, the adjusting pieces being provided or formed with
screw extensions upon which nuts are placed and by means of which the position of
the brasses and of the shafting is shifted and determined as required, the brasses
and adjusting pieces being also slightly hollowed out on their adjoining faces to a
similar contour, so as to have a desirable freedom of movement, all substantially as
and for the purposes hereinbefore described, and as illustrated on the accompanying
Sheet of Drawings.
In witness whereof, I, the said Benjamin Hewitt, have hereunto set my
hand and seal, this Sixteenth day of July, in the year of our Lord One
thousand eight hundred and seventy-nine.
Witness,
JOHN KENDRICK.
BENJAMIN HEWITT. (L.S.)