Improvements in Tube Expanders.
Year: 1894

page_text: Date of Application, 14th Apr., 1894
Complete Specification Left, 14th Jan., 1895-Accepted, 23rd Feb., 1895
PROVISIONAL SPECIFICATION,
Improvements in Tube Expanders.
CHARLES WICKSTEED Engineer Stamford Road Works Kettering Northampton-
shire do hereby declare the nature of this invention to be as follows :-
Amongst other matters described in the Specification of my Patent No. 15,679
A.D. 1889 are wires placed behind and at the side of the rollers of a tube expander
to hold them from falling out when the mandrel is withdrawn. To remove the
rollers these wires which have a bearing at each end are withdrawn. The object
of my present invention is to improve this method of securing & removing the
rollers of a tube expander by the use of a spring preferably in the form of a wire
fastened by preference securely at one end only. The other end being left free to
Field & allow the roller to pass by when sufficient pressure is put on it. The wire
being of such strength and in such a position as to allow of this while at the same
time keeping the roller in position at other times.
Dated this 13th day of Anril 1894.
Improvements in Tube Expanders.
I, CHARLES WICKSTEED, of Stamford Road Works, Kettering Northamptonshire
Engineer, 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 I
My invention has for its object the improvement of the tube expanders set forth
and described in my Patent No. 15579 A.D. 1889 and refers to the means for
retaining the rollers in position and preventing them from dropping out.
effect in a more simple and equally effectual manner while by my present
improvements the rollers can be much more quickly and easily removed or inserted
than hithertofore.
In order that my invention may be clearly understood and more easily carried
into practice I have appended hereunto one sheet of drawings upon which I have
fully illustrated the nature of my said improvements as well as the mode of carrying
the same into effect.
Figure 1, is a longitudinal section through one of my expanders taken on the
line 1-2.
Figure 2, is a cross section through Figure 1 on the line 3-4.
Figure 3, is a longitudinal section through Figure 2 on the line 5-6 showing by
diagram the mode of inserting the roller.
In carrying my invention into effect the solid body A, movable collar C, and
rollers B of my expander are similar to those described & shown in my before
mentioned Patent but in place of securing the rollers B in position by means of
wire rods which required to be removed before the rollers could be withdrawn I
now fix the wire F at the one end only leaving the other end f' free to spring
back when the roller B is pressed against it when being removed or replaced as
LD
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page_text: shown in the case of the roller b¹ Figure 2. In order to prevent the wire F from
being overstrained I form the grooves a¹ in the body immediately behind the wire
into which the end f' is pressed when the roller is being pushed home. By these
means it is only necessary when taking out or inserting the rollers to tip them as
shown by Figure 3 at the same time pressing them against the end of the wire F
which will be readily affected by always keeping the roller against the angle a' of
the body while for replacing the end of a mandrel H facilitates the operation.
Although the wire F is most suited to my purpose I may use any suitable spring
as an equivalent without departing from the nature of my said invention.
Having now particularly described and ascertained the nature of my said inven-
-tion and in what manner the same is to be performed I declare that what I
claim is :-
In a solid body tube expander the spring wire F fixed at one end only or its
equivalent spring substantially as & for the purpose herein set forth and shown
upon the accompanying drawings.
Dated this 12th day of January 1895.
CHAS. WICKSTEED.