Year: 1886

page_text: Date of Application, 15th Apr., 1886.
Complete Left, 15th Jan., 1887.
Complete Accepted, 15th Feb., 1887.
We JOHN FRANCIS HALL of Norbury, Sheffield, Manager of Steel Works, and
JOHN VERITY of Billing Bank, Bramley, near Leeds, Engineer, both in the County of
York do hereby declare the nature of this invention to be as follows:-
Our improvements have reference to an invention for which Letters Patent were
granted to us dated 17th January 1885 No. 684.
In our improvements we make the crank pin solid or fixed in one of the webs, and
place on the outer end of the crank pin and in the eye of the other web a circular
bush, as described in the Specification of the above mentioned patent.
The other web in the first place is countersunk to form the eye, and into such recess
we screw an adjustable ring plate.
The bottom of the recess or countersink and the inner face of the adjustable ring
are made concave to form a bearing or seating to fit the convex periphery of the
circular bush, but in some cases instead of forming a concave part at the bottom of
the countersink or recess, we bore a hole through the web and fix or screw in another
ring plate to receive it.
The bush being placed in position the adjustable ring plate is screwed into the hole
until the bush is supported within it and the concave part at the bottom of the
countersink or additional ring plate, and the adjustable ring plate after being brought
into position is held there by a key and may at any time be adjusted up to the bush
when necessary.
In these improvements the web to which the ring plate or plates are applied may
when required be formed solid on the shaft.

page_text: Fig. 1 is a part sectional elevation.
Fig. 3 an end elevation of the same.
Fig. 2 is also a part sectional elevation and
Figs. 4 and 5 are enlarged details, respectively
a plan and section, all of which are described hereafter.
In our improvements we make the crank pin A solid or fixed in one of the webs B,
and place on the outer end part of the crank pin A and in the eye of the other web Ca
circular bush D as described in the specification of the above mentioned patent.
To form a seating for the circular bush D in the crank eye of the web C, the eye is
countersunk or enlarged in diameter half way through the web Cat E to receive an
adjustable ring plate which is screwed therein, a screw thread being first formed on
the periphery of the adjustable ring plate and on the inner circumference of the
countersink or enlarged part E of the eye in the web C to correspond with each
other.
The inner face or surface of the adjustable ring plate F and the other portion of
the eye is made concave to form a bearing or seating to fit the convex periphery of
the circular bush, but in some cases instead of forming a concave part in the solid
web (Fig. 1) we continue the diameter of the enlarged or countersunk part of the eye
through the web C and fix or screw in another ring plate G to receive it, as shewn at
Fig. 2.
The bush D being placed in position the adjustable ring plate F is screwed into the
hole until the bush D is supported within it and the concave part at the bottom of the
countersunk or additional ring plate G.
The adjustable ring plate F after being brought into position is held there by a key H
and may at any time be adjusted up to the bush D, when necessary.
For the purpose of taking up any slack or play between the screw threads on the
periphery of the adjustable ring plate F and the corresponding threads in the interior
of the eye, we split the adjustable ring plate. F through one side at J and into a
tapped hole intersected by the split introduce a taper screw & which expands such
ring F and makes it a tight fit in the countersunk or enlarged part of the eye of the

page_text: web. To keep such screw K in its position we employ the stud L, lock plate M. and
split pin N as shewn at Figs. 4 and 5. or any other suitable arrangement.
In these improvements the web C to which the ring plate or plates are applied may
when required be formed solid on the shaft.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed, we declare that what we claim is :-
1st. The screwed ring plate or plates F and G and the mode of applying the same
to or in the eye of the crank, substantially as and for purposes herein set forth.
2nd. The arrangement of split adjustable ring F, substantially as horein set forth.
Brd. The taper screw K for expanding the split ring F, and the means employed for
locking the saine, substantially as and for purposes herein set forth.
4th. The combination of the various parts forming our improvements in the
construction of cranks, substantially as herein set forth."
J. W. HARDING,
For the Applicants.