Furniture.
Year: 1887

page_text: Articles of Furniture.
I, MATHIEU CARBONEL residing at Marseilles in the Republic of France, do
bereby 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:
The object of the present invention is to design a music-stool which without being
too heavy unites the conditions of solidity so as not to be liable to become ricketty and
move and roll with the movements of the pianist and the seat of which still can be
lowered or raised with facility.
In the accompanying drawings are
Fig. 1 an elevation of the stool with lowered seat.
Fig. 2 the same with raised seat.
Fig. 3 a vertical section of figure 2 and
Fig. 4 a horizontal section through the top of the lower or fixed part of the stool.
The stool consists like all others of an upper or movable part and a lower or fixed
part.
In the axis of the seat A is a flat iron guide B provided with stops CC at top
and bottom and the top stop C is retained by an iron plate D screwed to the bottom
of the seat.
The seat rests on a circular disc E fitting into a recess in the bottom of the seat
and fixed thereto by the plate D. The disc E is provided with three racks H, H', H".
The lower or fixed part consists of two discs I and J screwed together, the upper
one I of which is recessed on its lower side and through both pass holes for the
passage of the racks and the central guide. In the recess of the upper disc I and
resting on the lower one J is a disc or drum K provided on its periphery with one
single screw thread L being the principal feature of this construction. In the centre
the drum K is provided with a slot and two guide pieces M M₁ for the central
guide B.
Three legs N N¹ N" and a central downward projecting piece O all partially
hollowed out for the reception of the racks and the central guide complete the stool.

page_text: The working of the stool is easy to understand. It suffices to give the seat a rotary
movement when the central guide between the two guides M M¹ will communicate
this movement to the drum K with the screw thread L. The latter gearing with the
teeth of the racks will thus give the seat of the stool an additional vertical movement
and according to the direction of the rotary movement the seat will be either raised
or lowered at will. The stop C on the bottom of the central guide B will by abutting
against the drum K limit the upward movement of the seat i.e. prevent it from being
entirely unscrewed.
It will thus be seen that the screw thread L engaging with the teeth of the rack
forms the principal feature of this construction.
It is of course understood that the above described construction may be applied to
all sorts of seats, to tables such as card-, work-, drawing-, and dining tables, and other
articles of furniture too numerous to mention, without departing from the principle of
the invention.
The above described parts may be made entirely of wood or entirely of metal or
partly of wood and partly of metal. The racks are proferably made of wrought or
cast iron or steel but may be made of any suitable metal if desired.
Although only one application of the invention is described and represented it is
understood that the number of the parts may be increased or decreased and their
form position and arrangement modified according to circumstances or the desire of
the user.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed I declare that what I claim is :-
A seat having an upper movable part provided with racks and a central guide
which latter following the rotary movement of the upper part turns a helicoidal or
peripherally screw threaded disc which is situated in the lower or fixed part of the
seat and engages with the teeth of the racks in such a manner that the central guide
(vertically movable) and the helicoidal disc (vertically immovable) turning with the
movable part of the seat will either raise or lower the racks with the movable part of
the seat, according to the direction of the rotary movement, substantially as specified.
Dat this ath day of Anril 1887