Improvements in Frames and Covers for Cellar Openings and the like.
Year: 1899

page_text: Date of Application, 13th Feb., 1899-Accepted, 18th Mar., 1899
COMPLETE SPECIFICATION.
Improvements in Frames and Covers for Cellar Openings and the like.
We, KARL SCHMIDT, and JOHANN STOLLE, both Manufacturers, of 132, Wörth-
strasse, Hochfeld, Germany, do hereby declare the nature of this invention, and
in what manner the same is to be performed, to be particularly described and ascer-
tained in and by the following statement:-
The frames and covers for cellar openings and the like heretofore in use have
the disadvantage, that it is possible for anybody, without hindrance, to remove the
cover whereby a ready passage for thieves into the cellar is obtained.
According to the present invention these faults of the well known arrangements
are obviated by attaching a loose bolt or catch capable of being turned, to the cover
of the cellar opening or the like which bolt, when the cover is put on, is pushed over
or past a tongue on the frame of the cellar opening, and hooks itself fast under the
said tongue, so that a removal of the cover is only possible after drawing back
the bolt or catch from the interior of the opening.
The improvements are illustrated in the accompanying drawing in which Figure 1
shows a plan view of the frame and cover, Figure 2 a section and Figures 3, 4,
and 5, details of the same.
The devices consist essentially of the frame a and the cover b. By preference
the cover is made circular, that being the most suitable form for the purpose, in
order to avoid the possibility of the cover passing through the opening. The
cover b carries on its underside, the bolt or catch d, capable of turning easily in
the bearing lugs c. This bolt occupies the position clearly shown in Figures 3
and 4, and is provided at its lower end with a projection d', which, when the cover
is put on over the opening, catches under the projection f¹ of the tongue f, and
thereby hooks itself firmly into its place.
The bolt or catch d is also provided with a hole and the tongue f with a
corresponding hole so that when the bolt or catch is engaged with the tongue
a pin can be pushed through these two holes and the position of the bolt secured.
Should it now be desired to raise the cover, it will be absolutely necessary to draw
back the bolt d, which can only be done from the interior of the opening. To
enable the cover to be put in its proper position without difficulty the upper side
of the cover and frame may be marked with suitable lines m and n Figure 1. Of
course several bolts or catches of the kind above described may be arranged on
the cover, the bolts catching under corresponding tongues, but for ordinary cases
one will be found sufficient there must then, however, be provided on the cover
a projection o immediately opposite the bolt or catch, which, when the cover is
put on, will take under a projecting piece p formed with or secured to the frame in
order to prevent the cover from being removed.
Having now particularly described and ascertained the nature of the said in-
vention, and in what manner the same is to be performed, we declare that what we
claim is:
The improvements in frames and covers for cellar openings and the like which

page_text: consist of a bolt or catch on the cover of the opening which bolt is capable of
turning loosely, and when the cover is put in place engages with a tongue on the
frame surrounding the cover and hooks itself automatically thereto, so that the
cover cannot be removed until the said bolt or catch is drawn away free of the
tongue, from the inside of the opening, substantially as described.
Dated this 15th day of February 1899.
K. SCHMIDT,
J. STOLLE,
Per W. H. Beck,
115, Cannon Street, London, E.C., Agent.