IMPROVEMENTS IN CRANK-WEBS FOR LOCOMOTIVE AND OTHER ENGINES AND MACHINES
Year: 1885

page_text: Engines and Machines. .
I, CLEMENT EDWIN STRETTON of 40 Saxe Coburg Street, Leicester in the
County of Leicester, Consulting Engineer, do hereby declare the nature. of my
invention for "IMPROVEMENTS IN CRANK-WEBS FOR LOCOMOTIVE AND OTHER
ENGINES AND MACHINES" to be as follows:-
This Invention relates to an improved method of strengthening the webs or
throws and other parts of Crank Axles, or shafts, and is specially applicable to
Locomotive and other Engines or Machines-The Crank having been manufactured
in the usual manner my improvement consists in drilling one, two, or more holes
(A A) of suitable diameter through the length of the Crank webs or throws-
I then pass a bolt pin or screw, through the said before mentioned holes-The
object being to strengthen the Crank when working and in case of fracture or
breakage, to hold the Crank together in such manner that the wheels of a
Locomotive Engine would be prevented from leaving the rails and thus give time
for the Engine Driver to bring his train to rest and prevent a disaster-The said
bolts can be either screwed into the web, or Crank, or driven by any desired
pressure. According to another of my present improvements I pass a similar bolt
through the Crank, pin, and through the straight portion of the axle.
Dated this 5th day of September 1885.
I, CLEMENT EDWIN STRETTON of 40 Saxe Coburg Street Leicester 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 relates to an improved method of strengthening the webs or
throws of crank axles or shafts, and is specially applicable to Locomotive and
other Engines or Machines

page_text: The crank having been manufactured in the usual manner-my improvement
consists in drilling one, two or more holes of suitable diameter through the length
of the crank webs or throws-I then pass a bolt, pin or screw through the said
before mentioned holes, the object being to strengthen the crank when working
and in case of fracture or breakage to hold the crank together in such manner
that the wheels of a Locomotive Engine would be prevented from leaving the rails
and thus give time for the Engine Driver to bring his train to rest, and prevent a
disaster. The said bolts can be either screwed into the web or crank or driven by
any desired pressure.
Fig. 1 of the accompanying drawing shews a sectional front elevation and
Fig. 2 a plan of a crank constructed according to my invention. Each crank web
or throw has two holes bored longitudinally through it, through which are passed
screw bolts A A, the heads and nuts of which are made to bear against the end
surfaces of the crank, so that on screwing up the nuts a certain amount of
strengthening effect will be produced, while should the web of the crank break or
crack the bolts will prevent the parts from separating.
Fig. 3 shews at B a screw bolt with countersunk head and with lock nuts
instead of a single nut and pin. C shews a threaded bolt screwed into a threaded
hole in the crank and having its ends rivetted over. Fig. 4 shews, at D, a square
threaded bolt screwed through the hole in the crank and secured by a head and
lock nuts; and E shews a plain bolt with countersunk head at one end, the other
end being rivetted over.
It will be evident that a single bolt or more than two thereof might also be used
for each crank web, but I prefer to employ two as described.
Having now particularly described and ascertained the nature of my said
Invention and in what manner the same is to be performed, I declare that
what I claim is:
The method herein described of drilling one or more holes longitudinally
through the solid webs of cranks and passing bolts, pins or screws through such
holes, the said bolts pins or screws being provided with heads, nuts or equivalent
means for confining the ends of the crank web between the ends of the bolt or bolts,
substantially as and for the purposes set forth.
DALE FIL J 1000
ABEL & IMRAY,
Agents for the Applicant.