Year: 1897

page_text: Date of Application, 29th May, 1887
Complete Specification Left, 22nd Feb., 1898-Accepted, 28th May, 1898
I, WALTER CLAUDE JOHNSON, of the Dignaries, Westcombe Park, in the County
of Kent, Engineer, do hereby declare the nature of this invention to be as
follows:-
:-
My invention relates to presses for giving outward support to two or more objects
or bodies, while they are being subjected to an internal or bursting pressure, or
for any other similar purpose. According to my invention, I apply pressure and
thereby relain the objects in close contact by a series of screw spindles. I describe
below one form of press constructed in accordance with my invention. The
portions of the press between which is to be placed the object or objects to be
pressed together or the object to be retained in contact I make in sections, the
parts being held together by means of loose or hinged dogs, clips or arms, which
I make T shaped at their onds, the upper ends lying in recesses in the top part of
the press, and the lower ends catching under luga on the lower part of the press,
these luga are so shaped that, by a very slight relaxation of the pressure screws,
the dogs can be readily removed, and the top part of the press removed.
One part of the press is provided with a number of screw spindles, which have
stops to prevent them from turning, but which are free to slide up and down,
and each of these is fitted with a spur wheel or pinion having a screw thread cut
in the boss to suit the spindles.
These spindles are preferably arranged in a circle and are all geared direct, or
by means of intermediate wheels, to a central spur wheel or pinion, which is
fastened to a alcove on a central spindle, so that any movement given to this central
wheel is communicated to the other wheels, which consequently travel up or down.
the screwed spindles. The jig or container holding the object to be compressed
and held in contact is placed between the two parts of the press with the ends of the
screw spindles of the upper part reating upon it, the dogs or arms are slipped into
their places, the central wheel is then worked so as to make the other wheels travel
up the screwed spindles, drawing the connecting arms light under the lugs on the
bottom part of the press, and putting pressure on the jig or container in the press.
Dated this 29th day of May 1897.

page_text: manner the same is to be performed, to be particularly described and ascertained,
in and by the following statement:―
My invention relates to presses for giving outward support to two or more objects
or bodies while they are being subjected to an internal or bursting pressure or for
any other similar purpose.
Thus, for instance, in jointing the tubular frame of a velocipede by the applica-
tion of internal fluid pressure, the two halves of the mould which encloses the
frame may be pressed and held together by the clamping press about to be
described.
For this purpose I construct a screw clamping press as I shall describe referring
to the accompanying drawings.
Figure 1 is a side view partly sectional of one form of press according to my
invention,
Figure 2 is in its lower half a half plan of the top of the press and in its upper
half a plan of the ring which supports the gear wheels,
Figure 3 is an elevation, and
Figure 4 is a plan of a modified form of the press.
Referring first to Figs. 1 and 2, A. is the top part of the press and B the lower,
C are clips having T shaped ends which rest on recesses on the top part and
catch under the lugs E on the lower part of the press. I are a number of screwed
spindles which are circularly arranged in the upper part of the press, G are spur
pinions each internally screw threaded to form nuts for the spindles F. H is a
ring which supports the pinions and is secured to the top part of the press by
bolls h. I are keys which provent the spindles F from turning but allow them
to slide vertically.
K is a central sleeve on which is fixed a driving wheel L, which is geared to the
pinious through intermediate wheels M.
On the top of the central sleeve is fixed a head N to receive bars for turning it
and so actuating the pinions.
Through the sleeve passes a spindle O with a shackle at the top for convenience
in lifting and removing the top part of the press and the top half of the container l'
which supports the object or objects to be pressed.
As shewn in Figs. 3 and 4 the two parts A and B of the press aro tied togethor
by the four strong bolts C.
The screwed spindles F, pinions G, driving wheel L, and intermediate wheels M
are the same as those above described; but the central sleeve is provided at the top
with a hand wheel, V, for turning it and actuating the pinions.
The lower part or base of this press is provided with an extension R, and a
traversing screw S, with reversing gear T for drawing the container P into and from
the press and a jib U is provided for lifting the upper half of the jig or container.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. A screw olamping press having its upper part secured to its lower part by
detachable clips, and provided with scrowed spindles, pinion nuts thereon, and
means of actuating the nuts, substantially as described with reference to Figs. 1
and 2,
2. The modified press having its upper part bolted to its lower part, substantially
as described with reference to Figs. 3 and 4.