Improvements in Adjustable Chairs and Stools and other Furniture, such as. Combined Billiard and Dining Tables.
Year: 1884

page_text: Improvements in Adjustable Chairs and Stools and other
Furniture, such as. Combined Billiard and Dining Tables.
PROVISIONAL SPECIFICATION.
We ALBERT VON DER SAHL and MAX OTTO HUND trading as Sahl & Co. of
Basingball Street in the City of London Foreign Manufacturers' Agents and
Import Merchants do hereby declare the nature of said invention for "IMPROVE-
MENTS IN ADJUSTABLE CHAIRS AND STOOLS AND OTHER FURNITURE SUCH AS
COMBINED BILLIARD AND DINING TABLES (A communication to us from abroad
"
by E. Calix-Toussaint of Zurich Switzerland) to be as follows:-
The object of this invention is so to construct chairs and stools that the height
of the seats may be adjusted according to the height or convenience of the person
using same; for this purpose the seat proper is supported by three or more screw
threaded rods which pass through threaded nuts held in the frame below
A chain
is carried round these nuts the outer circumference of each of which is formed with
teeth to take into the chain. Above one nut there is a worm which gears into
another worm on a spindle which is operated by a crank handle or wheel at the
side and according to the direction in which the handle or wheel is turned, the
screw rods through and by the movement of the chains and nuts are caused to
travel up or down and with them the seat. Chairs and stools constructed in this
manner are particularly applicable as music chairs and stools as well as for schools
and library use the necessary or required height for the person using same being
obtained with the greatest facility and even without moving from the chair itself.
The frame may be stuffed and fitted to suit the taste of the user and be provided
with fringe or hangings to hide from view the mechanism if desired. When applied
to combined Billiard and Dining tables the objection now existing as to height is
obviated.
T
1

page_text: We ALBERT VON DER SAHL and MAX OTTO HUND trading as Sahl & Co of
Basinghall Street in the City of London Foreign Manufacturers Agents, and
Import Merchants do hereby declare the nature of said invention for "IMPROVE-
MENTS IN ADJUSTABLE CHAIRS AND STOOLS AND OTHER FURNITURE SUCH AS
COMBINED BILLIARD AND DINING TABLES" (A communication to us from abroad
by E. Calix-Toussaint of Zurich Switzerland) and in what manner the same is to
be performed to be particularly described and ascertained in and by the following
statement:
1. 1: ไม
The object of this invention is so to construct chairs and stools that the height
of the seats may be adjusted according to the height or convenience of the person
using same-for this purpose the seat proper is supported by three or more screw
threaded rods which pass through threaded nuts held in the frame below. A chain
is carried round these nuts the outer circumference of each of which is formed with
teeth to take into the chain. Above one nut there is a worm, which gears into
'another worm on a spindle which is operated by a crank handle at the side and
according to the direction in which the handle is turned the screw rods through
and by the movement of the chains and nuts are caused to travel up or down and
with them the seat.
The accompanying drawings illustrate the manner in which this invention may
be carried into effect. Figure 1 is a front elevation of a chair constructed according
to this invention when the seat of same is lowered to its greatest extent. Figure 2
is a perspective view of 'the same chair showing the seat slightly raised. Figure 3
is a horizontal section on a larger scale than Figures 1 and 2 through the line a, b
of Figure 1 where the seat proper is removed. Figure 4 is a vertical cross section
through the line c d of Figure 3 and Figure 5 is a plan of the under side of the
frame showing the toothed wheels and chain for transmitting the required rotary
'motion to the screw threaded rods carrying the chair seat. Figures 6.and-7-show
in elevation and sectional_plan respectively this invention as it may be applied to
*combined billiard and dining tables. Similar letters of reference refer to like
parts in all the Figures. a a¹ a² are the screw threaded rods supporting the chair
seat band connected thereto; c is the chair frame and d, d1, d2, are the threaded
nuts with teeth on their outer circumferences as shown; these nuts are fitted in
'the frame c; e is a worm gearing into upper part of the teeth of the nut d; fis a
crank handle for 'operating this nut d; g is the chain passing round the teeth of
the three nuts d d¹ d², thus by communicating rotary motion to the nut d through
the worm e and crank handle f the chain is caused to travel round the three
nuts'd d¹ d2 whereby the screws a a¹ a are caused to turn and consequently' to
raise or lower the seat b of the chair according to the direction in which the crank
handle fis rotated. This crank handle f when not required for use can be taken
off the worm spindle. Instead of a crank a wheel or other appliance could be used
for communicating motion to the worm.
J.
Chairs' and stools constructed in this manner are particularly applicable as music
chairs and stools, as well as for schools and library use the necessary or required
height for the person using same being obtained with the greatest facility and even
without moving from the chair itself. The frame may be stuffed and fitted to suit
the taste of the user and be provided with fringe or hangings to hide from view
the mechanism if desired. When applied to combined billiard and dining tables
the objection now existing as to height is obviated. Figure 6 shows in side
elevation and Figure 7 in horizontal section the arrangement just described as

page_text: applied to a combined Billiard and dining table; the arrangement is precisely
similar to that just described although in the drawing I have shown four nuts d
round which the chain g passes but although not shown the arrangement is equally
applicable to chairs.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim as the invention communicated to us is:-
In adjustable chairs stools and combined Billiard and dining tables the adjusting
the position of the seat or surface thereof in and by the application thereto of
screws operated by an endless chain travelling round nuts on the screws one of
the said nuts being operated by a worm all combined and acting substantially as
herein before described and illustrated in the accompanying drawings.