An Improved Method of Actuating the Diaphragms of Strainers for Paper Pulp.
Year: 1890

page_text: Date of Application, 28th Nov., 1890
Complete Specification Left, 25th Aug., 1891-Accepted, 26th Sept., 1891
PROVISIONAL SPECIFICATION.
An Improved Method of Actuating the Diaphragms of Strainers for
Paper Pulp.
I HENRY JOHN ROGERS of the Watford Engineering Works Watford in the
County of Hertford do hereby declare the nature of this invention to be as
follows:-
The object of this invention is to reduce the number of working parts in a
strainer, and to obtain the same result as heretofore, with less friction and at less
cost.
To effect the above object, I fix on the frame of the strainer, in any convenient
position beneath the diaphragm, one or more slide bars, and I attach the end of the
connecting rod, which is affixed to, and actuates the said diaphragm to a block made
to slide between, or upon, the said slide bars.
In the case of a strainer with 2 diaphragms I attach two of the aforesaid blocks
together by a connecting rod so that both work simultaneously and I then connect
the end block by means of another connecting rod to a crank driven by a strap from
any convenient shafting as heretofore.
Upon the said crank which is preferably of the disc shape I arrange a groove in
which the crank pin is made to slide in such manner that it can be fixed in any
position in the said groove in order to lengthen or shorten the stroke of the blocks
sliding on, or in the slide bars aforesaid, and at the same time lengthen or shorten
the stroke of the diaphragm to suit the various stuffs" being passed through the
paper machine.
In order that the diaphragm may work vertically I guide it by means of vertical
rods attached to the underside thereof, the lower ends of the said rods passing
through guides affixed in the framework of the strainer and having springs at their
bases as described in my Patent No. 1533387.
Or according to another arrangement I fix to the underside of the diaphragm a
rod in connection with one half of a circular strap the other half of the said strap
being continued downwards and forming a guide for the vertical working of the
diaphragm as above described.
Inside this circular strap I cause to revolve by the above or any other usual or
suitable means a shaft having 2 or 3 or more cams upon it and revolving with it,
these said cams impinging upon one or more steel plates fixed in the strap itself,
and it will be evident that each time the cam or cams come in contact with the
steel plate at the top of the strap the diaphragm will be raised and when the said
cams come in contact with the plate at the bottom of the strap it will be depressed
so that if require.l as many as three vibrations of the diaphragm can be obtained
with one revolution of the crank shaft on which the said cams revolve.
Dated this 27th day of November 1890.
HENRY J. ROGERS.
COMPLETE SPECIFICATION.
0 An Improved Method of Actuating the Diaphragms of Strainers for
Paper Pulp.
I HENRY JOHN ROGERS of Lavington, Watford in the County of Hertford,
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 :-
The object of this invention is to reduce the number of working parts in a

page_text: Strainer and to obtain the same result as heretofore with less friction and at less
cost.
To effect the above object I fix on the frame a of the strainer (see Fig. 1) in any
convenient position beneath the diaphragmn one or more slide bars c and I attach
the end of the connecting rod which is affixed to and actuates the said
diaphragm to a crosshead e made to slide between, or upon the said slide bar or
bars c.
In the case of a strainer with 2 diaphragms bb, I attach two of the aforesaid
crossheads e e¹ together by a connecting rod f so that both work simultaneously and
I then connect the end crosshead e¹ by means of another connecting rod g to a
crank driven by a strap from any convenient shafting as heretofore.
Upon the said crank h which is preferably of the disc shape, I arrange a groove
in which the crank pin k is made to slide in such manner that it can be fixed
in any position in the said groove in order to lengthen or shorten the stroke
of the crossheads e e¹ sliding in, or on the slide bars c aforesaid, and at the
same time lengthen or shorten the stroke of the diaphragm to suit the various
"stuff's" being passed through the paper machine.
In order that the diaphragm may work vertically guide it by means of
vertical rods attached to the underside thereof the lower ends of the said rods
passing through guides m affixed on the framework a of the strainer and having
springs at their bases as described in my Patent No. 1533387.
Or, according to another arrangement (see Fig. 2), I fix to the underside of
the diaphragm o, a rod p in connection with one half of a circular strap the
other half of the said strap r being continued downwards and forming a guide s for
the vertical working of the diaphragm o as above described.
Inside this circular strap q r I cause to revolve by any usual or suitable means
a shaft t having 2 or 3 or more cams u upon it, and revolving with it, these said
cams impinging upon one or more steel plates v fixed in the strap itself, and
it will be evident that each time the cam or cams » come in contact with the
steel plates at the top of the strap the diaphragm o will be raised and when
the said cams come in contact with the plate at the bottom of the strap it will
be depressed so that, if required, as many as three vibrations of the diaphragm
can be obtained with one revolution of the crank-shaft on which the said cams
revolve.
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 :-
1st. The motion shewn on Fig. 1 of the accompanying drawings and consisting
of the crossheads e. e¹ the connecting bar the slide bar c. the whole being used
to actuate the diaphragms bas herein described and
2nd. The motion shewn in Fig. 2 of the accompanying drawings and consisting
of the cams u revolving on the shaft t the said cams u actuating the strap q r which
is in connection with and causes to rise and fall the diaphragms o of the strainer as
herein described and specified.
In itness whereof I the said Henry John Rogers have hereunto set my hand
and seal this 24th day of August in the year of our Lord 1891.
HENRY J. ROGERS.