Improvements in or relating to Lids for Drums and other Vessels, and for Holes in Sheet Metal Articles.
Year: 1888

page_text: Date of Application, 20th July, 1888
Complete Specification Left, 20th Apr., 1889
Complete Specification Accepted, 25th May, 1889
PROVISIONAL SPECIFICATION.
Improvements in or relating to Lids for Drums and other Vessels,
and for Holes in Sheet Metal Articles.
We JAMES JOHNSON, of Saint Anne's, St. Helens, and ROBERT GOLDTHORP BROOK,
of St. Helens, in the County of Lancaster, do hereby declare the nature of this inven-
tion to be as follows:-
This invention has for its principal object, the sealing of a hole in druins and other
vessels for holding caustic-grease-oil or other matter. It is also applicable, however,
for fixing the lids on to holes in any description of sheet iron tank or receptacle.
The lid may consist of a metal plate, having two or more projections (preferably
three) on one face projecting beyond the outside periphery of the lid. If there are
three, two of them are plain projections, cast, riveted or otherwise secured to the lid ;
the other projection is moveable in dovetailed guides or cheeks secured or made in a
solid piece with the lid. Between said guides a hole or slot is made (which is covered
by the moveable projection) through which a tommy bar or pusher can be inserted
and the moveable projection operated from the face of the lid opposite to that on
which the projections are placed.
To apply the lid, it is placed on the hole, and the fixed lugs or projections forced or
placed beneath the metal forming the rim or edge of the hole. The moveable pro-
jection is now shifted by the bar or key so that it also engages the metal of the vessel
round the hole, and the lid is now fixed. To remove it, the moveable projection is
shifted back by the key until it is clear of the flange and the lid can now be.
lifted off.
A peculiar shaned key can be used if desired.
WM. P. THOMPSON & Co.,
Of 6, Lord Street, Liverpool,
Patent Agents for the Applicants.

page_text: Improvements in or relating to Lids for Drums and other Vessels,
and for Holes in Sheet Metal Articles.
We, JAMES JOHNSON of Saint Anne's, St. Helens and ROBERT GOLDTHORP BROOK
of St. Helens in the County of Lancaster do hereby declare the nature of this inven-
tion 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 principal object, the sealing of a hole in drums and other
vessels for holding caustic-grease-oil or other matter. It is also applicable, however,
for removably fixing the lids on to holes in any description of sheet iron tank or
receptacle.
Referring to the drawings.
Figure 1 is a plan view of the under side of a lid constructed according to our
invention and attached to the opening in a drum head.
Figure 2 is a section through x x Figure 1.
The lid A may consist of a metal plate, having two or more projections (preferably
three A'A' A' as shown) on one face, projecting beyond the outside periphery of the
lid. If there are three, two of them, A' A', are plain projections, cast, riveted or
otherwise secured to the lid.
The other projection A' is movable, and may work in preferably dovetailed guides or
cheeks which are preferably of a circular shape so that the projection may turn freely
therein, and are rigidly secured to, or made in a solid piece with, the lid. These
dovetailed circular guides can be arranged as a central pivot or boss A4, which is
provided on its inner end with an enlarged head, or collar (A') that serves to retain
the projection in position against the face of the lid, and is formed preferably in a
conical form (dovetail section) as shown. This collar or head may be either a separate
piece attached to the pivot or it may be formed in one with it as shown in the
drawings.
Between the said guides, a hole or slot covered by the movable projection, is made
in the lid, and through this hole a tommy bar key or pusher may be inserted to
operate the said projection from the outside of the lid, that is, the side opposite to that
on which the projections are placed. Or the aforesaid hole may be dispensed with
and the operating key or bar applied directly to the pivot A', which is prolonged
slightly for this purpose, and is provided with a squared portion a or with a transverse
hole or its equivalent. Where the guide head or collar A' is made of a separate piece
as aforesaid, the pivot A' is provided on its outside portion with a projecting collar
which bears against the exterior face of the lid, but where the head A' is formed in
one with the pivot, this latter collar is made loose or is replaced by a washer b and
split pin c or its equivalent.
To apply the lid it is placed on the hole in the drum bead, etcetera, and the fixed
lugs or projections A¹ forced or placed beneath the metal forming the rim or edge of

page_text: the hole. The movable projection A' is now shifted by the bar or key, so that it also
engages the metal of the vessel round the hole, and the lid is now fixed. To remove
it, the movable projection is shifted back again by the key until it is clear of the drum
head, and the lid can now be lifted off.
A peculiar shaped key can be used if desired.
The edge d of the projection A' which first comes in contact with the edge of the
opening in the drum head, is preferably bevelled or cut away as shown to facilitate
its passage thereunder.
We have, in the drawing only shown a movable projection rotating on a circular
guide. It is obvious however that it could be caused to reciprocate instead on the
same circular guide, by being provided with a slot instead of a circular hole,
or in place of a circular guide, two straight dovetail guides could be used one on
each side.
We observe that one very broad back projection would do just as well as the
two A¹ A
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is :-
1. The improved fastening device for the lids of drums and other like articles of
sheet metal, consisting of one or more rigid projections located on the inner face of
the lid and adapted to be thrust under the druin head or its equivalent, and a movable
projection on the said face, but diametrically opposite to the fixed projections and
adapted to be thrust under the drum head by means of a suitable bar or key applied
on the exterior thereof, substantially as described.
2. The improved closing device for drum heads or the like constructed as a whole
substantially as described and shown.
131
LA 1000