IMPROVEMENTS IN CRANK AND OTHER SHAFTS FOR TRANSMITTING POWER
Year: 1883

page_text: LETTERS PATENT to George Allibon of Liverpool in the County of Lancaster
Engineer and Thomas Turton of the same place Iron and Steel Manufacturer
for an Invention of IMPROVEMENTS IN CRANK AND OTHER SHAFTS FOR
TRANSMITTING POWER
PROVISIONAL SPECIFICATION left by the said George Allibon and Thomas
Turton at the Office of the Commissioners of Patents on the 5th January
1883.
GEORGE ALLIBON of Liverpool in the county of Lancaster, Engineer, and THOMAS
TURTON of the same place, Iron and Steel Manufacturer IMPROVEMENTS IN CRANK
AND OTHER SHAFTS FOR TRANSMITTING POWER
Our invention has for its objects (1) so to construct crank shafts that the metal
is disposed in the best manner to resist the strains to which it is subjected in uso
(2) to admit of the crank webs and pins being easily forged and conveniently
shaped in the turning lathe and (3) to admit of the parts being easily repaired,
replaced, and renewed should occasion arise.
-
Our invention also has for its object so to construct shafts for marine engines
that they shall have sufficient elasticity to give more or less freely to such sido
strains or shocks as are caused by the blow of a sea and the working of the ship.
Our invention consists first: in constructing crank shafts in which the webs, the
pin or pins, and the lengths of shaft are each in separate pieces and are connected
by bolts, nuts, cotters, or otherwise in manner following:
(a) The crank shaft and pin are formed at some distance from the ends which are
connected to the webs with one or more circular excentric collars which fit into
similarly shaped recesses cut formed or made in the webs. The portions of the
shaft and pin beyond the collars extend through the webs and are secured by nuts
screwing thereon, by cotters passing therethrough or in any other convenient
manner. When circular excentric collars are used the shafts and pios are finished
in the turning lathe. If desired polygonal or other regular shaped excentric collars
may be (though not so advantageously) employed instead of the circular excentric
collers shove mentioned.

page_text: (b) The shafts and pins are formed with concentric collars of polygonal or other
regular shape capable of preventing the said shafts and pins from turning axially
when such collars fit into similarly shaped recesses in the webs.
(c) The shafts or pins are made or formed with one or more projecting lugs or
pieces which fit into recesses in the webs made to receive them,
In (b) and (c) the shafts and pins are held to the webs by means of screws or
otherwise as herein before set forth.
Under the second part of our invention we construct marine engine shafts with
disc like ends or couplings having their abutting faces slightly convex; or one only
of the meeting faces may be convex the other being flat or even slightly concave.
The two ends of the shaft butt together and the torsional strains are received by
bolts firmly secured in one of the discs and fitting into and through holes bored or
made in the other disc. The portions of the bolts fitting in the holes are preferably
curved in shape and bushes are provided to allow for renewal should the parts
wear loose. The outer ends of the bolts after passing through the disc are provided
with nuts, pins, or equivalent agents fitting against washers with curved faces.
Some of the bolts may be fixed in each disc and the washers may be of different
shape or they may be dispensed with.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Allibon and Thomas Tarton in the Great Seal Patent Office on
the 5th July 1883.
GEORGE ALLIBON of Liverpool in the County of Lancaster, Engineer, and
THOMAS TURTON of the same place, Iron and Steel Manufacturer, "IMPROVEMENTS
IN CRANK AND OTHER SHAFTS. FOR TRANSMITTING POWER
33
Our invention has for its objects (1) so to construct crank shafts that the metal
is disposed in the best manner to resist the strains to which it is subjectod in use
(2) to admit of the crank webs and pins being easily forged and conveniently
shaped in the turning lathe and (3) to admit of the parts being easily repaired
replaced and renewed should occasion arise.
Our invention also has for its object so to construct shafts for marine engines
that they shall have sufficient elasticity to give more or less freely to such side
strains or shocks, as are caused by the blow of a sea and the working of the ship.
Our invention consists first in constructing crank shafts in which the webs the
pin or pins and the lengths of shaft are each in separate pieces and are connected
by bolts nuts cottars or otherwise in mauner following:-(a) The crank shaft and
pin are formed at some distance from the ends which are connected to the webs
with one or more circular excentric collars which fit into similarly shaped recesses
formed or made in the webs. The portions of the shaft and pin beyond the
collars extend through the webs and are secured by nuts screwing thereon, by
cottars passing therethrough, or in any other convenient manner. When circular
excentric collars are used the shafts and pins are finished on the turning lathe. If
desired polygonal or other regular shaped excentric collars may be (though not so
advantageously) employed instead of the circular excentric collars above mentioned.
(b) The shafts and pins are formed with concentric collars of polygonal or other
regular shape capable of preventing the said shafts and pins from turning axially
when such collars fit into similarly shaped recesses in the webs (c) The shafts
and pins are made or formed with one or more projecting lugs or pieces which fit
into recesses in the webs made to receive them. In b&c the shafts and pins are
held to the webs by means of screws or otherwise as herein before set forth.
Under the second part of our invention we construct marine engine shafts with
disc like ends or couplings having their abutting faces slightly convex, or one only
of the meeting faces may be convex the other being flat or even slightly concave.
The two ends of the shaft butt together and the torsional strains are received by
bolts firmly secured in one of the discs and fitting into and through holes bored or
made in the other disc. The portions of the bolts fitting in the holes are preferably
curved in shape and bushes are provided to allow for renewal should the parts wear
loose. The outer ends of the bolts after passing through the disc are provided
with nuts pins or equivalent agents fitting against washers with curved faces.
Some of the bolts may be fixed in each disc and the washers may be of different
shape or they may be dispensed with.
DESCRIPTION OF THE DRAWINGS

page_text: manner similar to the end of the crankshaft a except that the excentric collar dis
made with taper instead of with parallel sides. The end of the shaft a¹ is made
with an excentric collar in the same manner as a and the parts are held in position
by the web being shrunk on the shaft so that neither nut nor cottar is required.
It will be obvious that in practice the joints would all be alike in each crank and
shaft and that with the above constructions the crank shafts pins and webs can all
be prepared in the lathe.
Fig 4 is a transverse section and figs 5 and 6 end views of a crank illustrativo of
divisions a and b of the first part of our invention. Division (a) One end of the
crank pin is formed with a hexagonal excentric and is held in position by tho
nut The other end is constructed with two circular excentric collars d' d' and a
cottar h is used to hold the parts in position.
Under division b of the first part the crank shaft a' figs 4 5 and 6 is formed
with a concentric polygonal collar i a nut being used as before set forth to hold tho
parts in position.
Fig. 7 is a longitudinal section and fig 8 an end view of a crank shaft a, web c,
and crank pin b, illustrative of two ways of carrying division c of the first part of
our invention into effect. here the shaft a and the pin bare formed with projecting
pieces which fit into recesses in the webs the parts being secured in position by
nuts substantially as herein before set forth. It will be obvious that cottars
shrinkage or other means of locking the parts in position may be used
Fig 9 is a side elevation of a coupling for marino engine shafts constructed in
accordance with the second part of our invention a a¹ shafts, kk¹ disc like ends
having their abutting faces slightly convex. Z bolts fitting tightly in the disc k
and freely in the bushes m in the disc . The portions of the bolts which fit
within the bushes m have curved or spherical surfaces. n washers with curved
faces, o nuts.
It will be evident that it is not in all cases necessary to secure the crank pin as
shown in figure 10 to the webs in the manner hercin set forth and that the same may
be made cylindrical and secured by shrinkage of the web by being forced into
position by hydraulic power or otherwise. It will further be evident that hydraulic
power may be used to force the shafts and webs into position.
Having now described and illustrated the nature of the said invention in such
manner that others will be enabled to carry our improvements into effect we
claim
First. Crank shafts constructed substantially as herein set forth.
Second. The combination of crank shaft a and crank pin b with excentric
collars & crank webs c and nuts for equivalent fastenings.
Third. The combination of crank shaft a and crank pin b with concentric collars i
crank webs c and nut for equivalent fastening.
Fourth The combination of crank shaft a, crank pin b with projecting pieces j
crank wob c and nut or equivalent fastening.
Fifth. Couplings for marine engine shafts constructed substantially as described
for the purposes herein set forth.
Sixth. The combination of the shafts a a¹ discs k. k', bolts and nuts o with or
without the bushes m and washers n or either of them.
In Witness Whereof I the said Thomas Turton have hereunto set my hand
and seal this fourth day of July in the year of Our Lord, one thousand
eight hundred and eighty threo.