Year: 1885

page_text: I ALFRED JULIUS BOULT of 323 High Holborn in the County of Middlesex,
Engineer do hereby declare the nature of this invention (a communication from
Friedrich Reil, and Johann Gustav Metz, of Brandenburg Germany) and in what
manner the same is to be performed, to be particularly described and ascertained
in and by the following statement :-
This invention consists in an arrangement to extract a certain quantity of the
contents of tin cannisters or other receptacles through the medium of a sliding
scoop, without the necessity of opening the cannister, and the scoop can either be
constructed to contain a measured quantity for use or it may be used for sampling
the contents.
In the accompanying drawings Figure 1 represents a vertical section of a
cannister, with the scoop B Figure 2 withdrawn. Figures 3 and 4 represents
Bap a on a larger scale. Figure 5 shows the flaps a and b in their extreme
position or on the point where they would begin to approach each other on the
withdrawal of the scoop B.
Figures 6º, 6b and 7 represent the method of closing the top of the cannister.
In Figure 1 the cannister is perfectly closed by flaps a and b. Flap a which is
represented on a larger scale in Figures 3 and 4, is pressed upwards by the
spring made preferably of a brass wire. On introducing the scoop B the flap a
is depressed until it rests on the small projection c. The flap b is preased down-
wards by a similar spring to f and on introducing the scoop B the flap rests on the
upper edge of the scoop, whose sides come to a point in front and scrapes off all
surplus on withdrawal of the scoop B. When the scoop B is to be introduced it is
pressed against the flaps a and b in the direction indicated in Figures 1 and 2 and
by this pressure the flap a is pressed downwards and the flap b is raised. The
scoop will then reach the bottom of the cannister and will slide in the grooves & in
the sides of the cannister which serve as guides.
On withdrawing the scoop B from the cannister the flap b will begin to close the
aperture by its downward tendency as soon as the scoop is withdrawn as far as 8
in Figure 5 and the aperture is perfectly closed as soon as the scoop is entirely

page_text: withdrawn, by the flaps a and b pressing against each other through their
respective upward and downward tendency.
In Figure 5 the flaps a and b are shewn in their extreme position or on the
point where they would begin to approach each other on the withdrawal of the
scoop B. The flaps a and b turn on or round the springs indicated as a¹ and b¹.
By their ends f¹ and f' the springs are soldered to the cannister and press against
the flaps a or b with their projecting portions g or gl. To make room laterally for
the flap a segmental hollows W are bulged out in the cannister.
Figures 6 and 6b and Figure 7 represent a simple method of closing cannisters.
A wire in the form shewn in Figures 6 and 6b is fastened to the lid E, as soon
as the eye x is pressed down the hooks v and v¹ will engage under the turned over
edges of the cannister y and y¹, Fig. 7 and to enable the cannister to be opened the
eye must be drawn up horizontally as shewn in Figure 1 so that the hooks
release the turned over edges of the cannister. Any packing may be used between
the lid and the cannister.
Having now particularly described and ascertained the nature of the said
invention and in what manner the same is to be performed as communicated to
me by my foreign correspondents I declare that what I claim is
1. In a cannister or other receptacle the arrangement of two flaps such as a
and b furnished with springs and pressing one against the other in combination
with a sliding scoop B for the purpose of automatically opening and closing the
said cannister or receptacle for the extraction of a certain measured quantity of
the contents thereof.
2. An arrangement for closing cannisters and the like, consisting of a wire fixed
to the lid, which engages on two sides with the turned round edges of the cannister
or other receptacle substantially as specified.