Improvements in the Construction of Bearings for the Shafts of Portable and similar Engines to Allow for Boiler Expansion.
Year: 1885

page_text: Improvements in the Construction of Bearings for the Shafts of
Portable and similar Engines to Allow for Boiler Expansion.
WILLIAM HORNSBY of Spittlegate Iron Works, Grantham in the County of
Lincoln, Agricultural Engineer, and ROBERT EDWARDS also of Spittlegate Iron
Works, Grantham in the said County Civil Engineer do hereby declare the nature
of our invention for IMPROVEMENTS IN THE CONSTRUCTION OF SHAFT BEARINGS
TO ALLOW FOR BOILER EXPANSION, to be as follows:-
We mount plummer blocks to carry the shaft, on suitable standards which latter
are attached to the Boiler, and connect the plummer blocks to the cylinder by,
suitable stays or rods-And in order to allow for the Boiler to expand without
altering the position of the plummer blocks we construct the plummer blocks with
trunnions placed fore and aft and carry them in the standards before named, the
trunnions nearest the cylinder being attached to it by suitable rods or stays thus
allowing the Boiler to expand whilst the plummer blocks slide on their trunnions
in the standards and without altering the position of the plummer blocks with the
cylinder-The trunnions also allow the plummer blocks to adjust themselves cross
ways to the shaft and if desired to fix the trunnions from oscillating a set screw
or key can be fitted.
T
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page_text: Portable and similar Engines to Allow for Boiler Expansion.
We WILLIAM HORNSBY & ROBERT EDWARDS both of Spittlegate Iron Works
Grantham, Engineers do hereby declare the nature of our invention for IMPROVE-
MENTS IN THE CONSTRUCTION OF BEARINGS FOR THE SHAFTS OF PORTABLE & SIMILAR
ENGINES TO ALLOW FOR BOILER EXPANSION and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
We mount pluimer blocks to carry the shaft on suitable standards which latter
are attached to the Boiler & connect the plummer blocks to the cylinder by
suitable stays or rods and in order to allow for the Boiler to expand without
altering the position of the plummer blocks, we construct the plummer blocks with
trunnions placed fore & aft & carry them in the standards before named the
trunnions nearest the cylinder being attached to it by suitable rods or stays thus
allowing the Boiler to expand whilst the plummer blocks slide on their trunnions
in the standards & without altering the position of the plummer blocks with the
cylinder. The trunnions also allow the plummer blocks to adjust themselves
crossways to the shaft & if desired to fix the trunnions from oscillating a set screw
can be fitted. In the drawings Figures 1. 2. 3. and 4 A shews the plummer blocks
& B its trunnions which is carried by suitable bearings C attached to the
standards D which latter are attached to the Boiler the plummer block at the end
nearest the cylinder of the engine has a rod E attached to it the other end of
which is connected to the cylinder or frame that carries the cylinder. The
plummer block being rigidly attached to the cylinder by the rod E as the Boiler
expands the bearings carried by the standards in which the trunnions of the
plummer blocks fit slide on the trunnions. Sometimes the bearings that carry the
trunnions see Fig. 3. & 4 are split at the top & have a bolt through the top so
that if the trunnions wear the wear can be taken up by tightening the bolt or the
bearings are made with a loose cap for the same purpose.
Having now particularly described & ascertained the nature of our said
invention & in what manner the same is to be performed we declare that what
we claim is:
In portable & similar engines constructing the plummer blocks with trunnions
on them which can slide in suitable bearings attached to standards which are
fastened to the Boiler the plummer blocks being rigidly attached to the cylinder
or other end of the Boiler by suitable rods.