An Adjusting Device suitable for Use in Conjunction with Articles of Furniture, such as Chairs, Tables, and the like.
Year: 1895

page_text: Date of Application, 2nd Oct., 1895-Accepted, 2nd Nov., 1895
COMPLETE SPECIFICATION.
An Adjusting Device suitable for Use in Conjunction with Articles of
Furniture, such as Chairs, Tables, and the like.
I, LOUIS POSERN, of Apolda, Germany, Manufacturer, 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 :-
This invention relates to a device for use in conjunction with articles of
furniture with the object that when applied to the lower part of a piece of
furniture (for instance to one or more of the legs of a chair or table) the device
will compensate for inequalities of the ground or flooring and thus enable the
article of furniture to stand upright.
Fig. 1 illustrates the device in front elevation, applied to one of the legs of n
piece of furniture such as a chair.
Fig. 2 is a vertical section taken through the same.
Fig. 3 is an underside view, and
Fig. 4 is a section taken on the line A-B of Fig. 2.
a is a toothed bar or rack formed at its lower end with a foot or enlargement b
and arranged in a suitable frame c in such a manner as to be capable of being
moved up and down in the direction of the leg of the article of furniture, so as by
this adjustment to alter the length thereof. For this purpose the device may be
arranged in a suitable cavity in the lower end of the leg and be screwed
ou by means of a foot plate d. For actuating and adjusting the toothed bar in
the vertical direction I preferably employ a worm e having spiral or helical
teeth which engage in the spaces of the teeth of the bar a and thus support the
said bar.
By suitably fluting or milling the teeth f on the outer periphery the several
threads of the worm e may be made to serve as gripping surfaces for more
readily grasping and adjusting the worm. Furthermore when such a worm is
employed, the toothed bar a will be automatically locked in its adjusted position,
whilst the worm e projects only to a slight extent from the leg of the article of
furniture.
The mounting of the worm e in the frame c is effected by means of a screw g.
This screw extends through the worm e, for which it serves as an axis and its
screw-threaded upper end is screwed into the frame c. It is formed with a slotted
head and the arrangement is such as to allow of the ready removal of the worm
and of the toothed bar for the purpose of cleaning the device.
Instead of having a foot b, the toothed bar a may be pointed at its lower end
so as to enable such pointed end to enter the flooring.
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 :-
1. A height-adjusting device for articles of furniture, comprising a toothed bar
or rack a located in a frame c and capable of being moved up or down, and means
such as the worm e for moving said toothed bar up and down, and for locking the
same in its adjusted position substantially as described.

page_text: 2. My height-adjusting device for use with articles of furniture constructed
substantially as described and shown.
Dated this 2nd day of October 1895.
F. WISE HOWORTH,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicant.