Year: 1894

page_text: GEORGE ELIAS ASBURY 16 Wellington Road Newark-on-Trent Nottingham-
shire Engineer do hereby declare the nature of this invention to be as follows:-
This my invention, has for its object, the parallel expanding of pipes, or tubes.
The stock, or body of my parallel expander, is constructed in the ordinary form,
and carries two or more parallel rollers. These rollers are tapered at each end for
a short distance up, and have their bearing, upon two cones having the same degree
of taper. These cones are screwed upon a spindle, which is fitted into the centre of
the stock, and upon which spindle is formed, a right and left hand thread or screw,
one cone being screwed right hand, and the other one being screwed left hand, to
correspond. By revolving this spindle, the cones are either brought closer together,
or drawn farther apart, and by this action, the rollers, the ends of which have their
bearing upon these cones, as before mentioned, are either forced outwards, or
allowed to fall inwards, according to the direction in which the spindle is revolved.
To prevent the cones locking themselves with the rollers, or working loose
through friction with the rollers, the boss; or that part of the stock upon which the
handle, or lever is fixed, when the expander is in use, is made polygonal in form,
and the end of the before mentioned spindle which passes through it, and which
projects the necessary distance beyond the end of the boss, is also made polygonal
in form, the number of flats being in each case the same. By using a double box
spanner, or other suitable tool, which fits on, or engages with the polygonal boss,
and the end of the spindle simultaneously, separate, or independent movement is
made impossible. The rollers being set up tight to the tube, while the expander
is in a state of rest.
Other means may be employed to obtain this result, such as a ratchet wheel and
pawl, fixed on the end of the spindle, or other suitable arrangement, but I prefer
using the device as described and set forth above.
Dated this 29th day of May 1894.
GEORGE ELIAS ASBURY.
COMPLETE SPECIFICATION.
A Parallel Tube Expander.
1, GEORGE ELIAS ASBURY, of 16 Wellington Road, Newark-on-Trent,
Nottinghamshire, 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 invention has for its object to construct a tube expander that shall be
capable of expanding pipes or tubes in a parallel manner.
According to my invention the tube expander consists of a stock or body which
may be of ordinary construction and through which passes a longitudinal spindle
provided with two cones whose distance apart is capable of being regulated
Price Adl

page_text: or adjusted as desired. Around these adjustable cones is arranged a series of
parallely disposed rollers, preferably three in number, having their end, portions
which come into contact with the adjustable cones, tapered or conically formed to
correspond with the conicality of the said cones. For the purpose of adjusting the
distance apart of the cones on the spindle I may form the latter with right and left
handed screw threaded portions, the cones being internally screw threaded one in
correspondence with the right handed thread and the other with the left handed
thread, so that when the spindle is revolved in one or other direction the cones
advance towards or recede from each other. In this manner the parallely arranged
rollers are caused to move nearer to or further from the spindle according as the
distance between the cones is increased or diminished. Instead of providing for
both of the cones to be movable as above stated 1 prefer to make only one of them
movable as hereinafter explained.
I also provide means such as a double box spanner for enabling the distance apart
of the cones to be adjusted, and for preventing the spindle and the movable cone
from independently shifting relatively to each other during the working of the
apparatus, as subsequently set forth.
In order that my said invention may be fully understood and readily carried into
effect will proceed to describe the same more fully with reference to the
accompanying drawings in which
Figure 1 is a sectional elevation of the expander.
Figure 2 is an end view thereof, as seen from the right and with the double box
spanner in place thereon.
Figure 3 is a vertical cross section taken on the line 1. 1 of Figure 1.
Figures 4 and 5 are respectively a face view and a sectional elevation of the
double box spanner shewn detached.
Like letters of reference indicate similar parts in all the figures.
A is the longitudinal spindle; B the parallely arranged rollers; C the stock or
body, and D a crank handle for actuating the apparatus.
The longitudinal spindle A passes centrally through the stock or body C which
in the construction shown in the drawings is formed of three detachable sections to
enable the rollers B to be fitted in place, these sections being connected together by
the screw bolt c. The said spindle is screw threaded for a portion of its length
at a and is provided with a fixed cone a¹. a² is another cone having a prolongation
or sleeve a³, this cone being screw threaded on its interior to engage with the screw
threaded portion of the spindle. Each of the rollers B consists of a cylinder having
symmetrical conical ends b that revolve in contact with the cones a¹ a² when the
apparatus is in use and is actuated by the crank handle D. The conicality of these
conical ends and that of the cones a¹ a² is such that the axes of the rollers B and
the spindle A are always parallel to each other irrespective of the distance apart of
the said cones. The rollers B are prevented from becoming detached by means
of end trunnions with which they are furnished and which enter flanged recesses c¹
formed in the end pieces of the stock or body C.
In order to prevent the distance between the cones a¹ a² from altering during the
working of the expander, I provide the prolongation or sleeve of the cone a² with
an octagonal end a, and the extremity of the spindle A, which projects somewhat
beyond the said end at, I provide with a square end a. The spanner E shewn at
Figures 4 and 5 is also provided with double cavities et es the former being made
octagonal and the latter square. When therefore. this spanner is applied to, the
spindle A and forced fully home it engages sinultaneously with the octagonal
end of the sleeve a3 and with the square end of the spindle A. When the spanner
is in this position any independent movement of the said cone or the spindle
relatively to each other is thus prevented. But by drawing back the spanner until
it comes clear of the octagonal end at the spindle A can be readily turned by the
said spanner in either direction and the distance apart of the cones a¹ a² be thereby
altered, the rollers B. being simultaneously operated so that they all move to the
samo extent in a parallel manner.

page_text: Although I prefer to use the double box spanner E above described for adjusting
the cones and for locking them in position I do not wish to confine myself thereto
as I may use any other convenient and appropriate means for the purpose such as
a ratchet-wheel and pawl located at the end of the spindle A.
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:
:-
1. A tube expander in which the expanding operation is effected in a parallel
manner substantially as described.
2. A tube expander consisting of a series of parallely disposed rollers having
conical ends and of a centrally arranged spindle carrying a pair of cones whose
distance apart can be varied, substantially as described and for the purpose
specified.
•
3. In a parallel tube expander the means for regulating and adjusting the
distance apart of the cones substantially as described with reference to
Figures 1, 2, 4 and 5 of the accompanying drawings.
4. A parallel tube expander having its parts constructed arranged and combined
to operate substantially as hereinbefore described with reference to the accompanying
drawings.
ليمو
1
1
100
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.