Improvements in Tables.
Year: 1891

page_text: Date of Application, 11th Nov., 1891
Complete Specification Left, 11th Aug., 1892-Accepted, 1st Oct., 1892
PROVISIONAL SPECIFICATION.
Improvements in Tables.
I, FRANZ KETTHAUS, of Berlin, in the Empire of Germany, Joiner, do hereby
declare the nature of this invention to be as follows:-
My invention relates to tables. A table constructed according to this invention
possesses extension-pieces consisting of slats which are connected similarly to those
of revolving shutters. The extension pieces are however not wound up, they are
only bent round and adapted to be moved under the table slab.
The extension pieces are hinged at one end to the table slab and at their other
end they can be moved under the table slab. These extension-picces are moved
outwards by pulling two frame slats which when the said pieces are moved back
form two sides of a frame enclosing the slab. The frame slats are connected at
their ends by plates with rollers which are parallel with these slats. Elongated
apertures are provided between the frame slats and the aforesaid rollers and serve
for the passage of the extension pieces. If a frame slat is drawn back the extension
piece is pulled out, its slats being caused to pass over the above-mentioned rollers.
In order that the frame slats with the rollers shall always be kept at the proper
level relatively to the table slab the rods passing through the rollers are connected
with guide bars adapted to slide in grooves in the under side of the table slab and
supported by cross bars.
In some cases I provide a device for enabling the extension pieces to be drawn
out symmetrically, that is to say when one extension piece is drawn out the other
will be caused to move outwards an equal distance. For this purpose two adjoining
pairs of the said guide bars are connected by endless chains which pass over rollers
so that when one guide bar is drawn out the chain will be moved round and also
cause the other bar to be slid outwards.
Another device which I sometimes employ comprises chains by which the
extension pieces can be pulled as far as possible from under the table. If such a
device is not employed the table can be extended only so long as the last slats of
the extension pieces are guided under the table. On the other hand the chains
draw the extension pieces back again into the guide. They may be secured to the
under side of the table slab, whence they pass to rollers fixed to the end of some of
the aforesaid guide bars. From these rollers some of the chains pass directly to
hooks on one extension piece, whilst the other chains pass back again under the
said extension piece and over rollers to hooks on the other extension piece. When,
on the extension pieces being drawn out and pushed back, the rollers are displaced
the chains will either yield or exert a traction upon the free ends of the extension
pieces in order to draw them into their guides.
Separate guides are provided under the table slab for the two extension pieces
in order that in the displacement of the latter they shall not slide one upon the
other and thus render their movement difficult. Intermediate slats may be used
for separating the extension pieces from each other.
The advantage of my improved table consists more particularly in its capability
of being extended any desired distance, which is impossible with the tables hereto-
fore employed.
Dated this Eleventh day of November 1891.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.,
Improvements in Tables.
I, FRANZ KETTHAUS, of 18 Mariannen Platz Berlin, in the Empire of Germany
Joiner, 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 :-
My invention relates to tables.
A table constructed according to this invention possesses extension-pieces
consisting of slats which are connected similarly to those of revolving shutters.
The extension pieces are however not wound up, they are only bent round and
adapted to be moved under the table slab.
Figure 1 shows a view from below the table when extended.
Figure 2 a longitudinal section.
Figure 3 the same with the slats slid inwards.
The extension pieces c d are hinged at one end b to the table slab and at
their other end they can be moved under the table slab a. These extension-
pieces c d are moved outwards by pulling the two frame slats h which when the
said pieces are moved back form two sides of a frame enclosing the slab, a, as
shown in Figure 3. The frame slats h are connected at their ends by the angle
pieces with the rollers which are parallel with these slats h. Elongated
apertures are provided between the frame slats h and the aforesaid rollers, 7 and
serve for the passage of the extension pieces. If a frame slat h is drawn back
(Figure 2) the extension piece is pulled out, its slats being caused to pass over
the above-mentioned rollers l. In order that the frame slats h with the rollers
shall always be kept at the proper level relatively to the table slab the rods
passing through the rollers are connected with guide bars m adapted to slide
in grooves in the under side of the table slab, and supported by cross bars.
In some cases I provide a device for enabling the extension pieces to be
drawn out symmetrically, that is to say when one extension piece is drawn out the
other will be caused to move outwards an equal distance. For this purpose two
adjoining parts of the said guide bars m, as shown in Figure 1, are connected by
endless chains s which pass over rollers, t at m' so that when therefore one guide
bar is drawn out the chain will be moved round and also cause the other bar to be
slid outwards.
Another device which I sometimes employ comprises chains by which the
extension pieces can be pulled as far as possible from under the table. If such a
device is not employed the table can be extended only so long as the last slats of
the extension pieces are guided under the table. On the other hand the chains
draw the extension pieces back again into the guide (Figure 2). In the arrange-
ment represented these chains i and k may be secured to the under side of the
table slab, whence they pass to the double rollers n fixed to the end of a rod m.
From these rollers some of the chains i pass directly to hooks el on the corre-
sponding extension piece c whilst the other chains k pass back again under the said
extension piece and over rollers v to the hooks d' on the other extension piece d.
When therefore on the extension pieces being drawn out and pushed back, the
rollers n are displaced the chains will either yield or exert a traction upon the free
ends of the extension pieces in order to draw them into their guides.
Separate guides are provided under the table slab for the two extension pieces
in order that in the displacement of the latter they shall not slide one upon the
other and thus render their movement difficult. Intermediate slats f may be used
for separating the extension pieces from each other.
The advantage of my improved table consists more. particularly in its capability
of being extended any desired distance within its range, as herein described, which
is impossible with the tables heretofore employed.

page_text: Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
First. A table having extension pieces c d adapted to be drawn out, which are
secured with one end to the table slab a and can be slid with the other end below
the latter, the displacement of the extension pieces being effected by means of
rollers or rods which act upon the extension pieces and are arranged at the ends
of bars m guided below the table slab a, the said rollers or rods being so connected
with the frame slats h that the extension pieces pass between them.
Second. In the extension table as referred to in the first claim the combination
of the extension pieces with chains hi which are fixed with one end below the
table slab a and with the other end to the extension pieces, and pass over rollers n
provided on the guide bars m, so that, when the latter are drawn in or out, the
chains will give and pull the extension pieces into their guides.
Dated this 11th day of August 1892.
HASELTINE, LAKE & Co.,
45, Southampton Buildings, London, W.C., Agents for the Applicant.