Year: 1889

page_text: We; MAX GOLDSCHMIDT and ALFRED MICHAELIS, both of Roedingsmarkt 76,
Hamburg, in the Empire of Germany, Manufacturers, do hereby declare the nature
of our 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 relates to water-closets and mainly consists in the arrangement for
locking the door by lifting the covering-lid of the seat and conversely by lowering
the latter to cause the locking mechanism to become disengaged.
The object of this contrivance is to prevent the seat from remaining uncovered
since, with the arrangement hereinafter shown, it is necessary to shut the lid before
leaving the closet, as the door can only become unlocked thereby.
The invention is represented in the accompanying drawing, Fig. 1 is a perspective
view of the arrangement of the closet. Figs. 2, 3, 4, 8 and 9 are detail views on the
same scale as figure 1; and Figs. 5, 6, 7, 10 and 11 are detail views on a larger
scale.
At the back part of the lid A pivoted at or otherwise hinged on the seat board B
is fixed an arm 1, the end of which is connected to a chain k running over
pulley underneath the seat-board and passing upwards through pipe t over the
pulley at the upper end of the same to a pulley said pulley being so constructed
that its axis of revolution coincides with that of the door. From the chain runs
over a pulley to the lock-mechanism arranged within the door.
The lock-mechanism represented in Figs. 10 and 11 consists of a hook H pivoted
on a pin u within the door T, said hook being connected to the other end of chain k
so that it may be moved by the same.
If the hook is raised, as indicated by dotted lines in Figs, 9 and 10, the door can be
opened or closed without any obstacle; whilst the door is locked as soon as the hook
has the position indicated in full lines in Figs. 10 and 11; the end of the said hook
catching into a plate q in the door-post G. The raising and lowering of the hook H
is caused by the lid A through the lever so that, as seen by Figs. 2, 3 and 5 by closing
the lid A the hook H is lifted and the door becomes unlocked. All parts of tho
contrivance are so arranged that they cannot be worked otherwise than by means of
the lid A.

page_text: The arrangement of the pulley ¹ in the axis of revolution of the door is of
importance that in moving the closet door no shortening nor lengthening of the chain
takes place.
To that part of the chain at the upper part of the door there can conveniently be
joined a second chain k¹, which, as seen in Figs. 1, 8 and 9, moves a plate with the
indications "Occupied" and "Empty" visible from without.
In order to disengage the lock mechanism from without in case of necessity, the
hook H is covered by a plate m, after the removal of which the hook can be easily
lifted out of the post G.
The contrivance above described can also be modified in that the hook H may be
placed within the post G and the plate q on the door T.
should pass from the upper end of the pipe t direct to the
over a pulley fixed thereto to the hook H. The pulleys ¹,
then be omitted.
In this case the chain k
post G and down within it,
and the chain k¹ would
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 :-
In a water-closet, the connection of the covering lid of the seat with a door lock or
latch by means of a chain or equivalent construction whereby the opening of the lid
causes the locking of the door and conversely the closing of the lid causes the
unlocking of the door.