AN IMPROVED DEVICE FOR RAISING AND LOWERING MUSIC STOOLS AND SEATS AND FOR LIKE PURPOSES
Year: 1884

page_text: HENRY PATTMAN. TRUEMAN and JOHN GEORGE NEW of 78 Parade Birmingham
in the County of Warwick, Engineers and Machinists do hereby declare the nature
of our invention for AN IMPROVED DEVICE FOR RAISING AND LOWERING MUSIC
STOOLS AND SEATS AND FOR LIKE PURPOSES to be as follows:-
This has hitherto been effected by inclined planes, screws, and also by a system
of links actuated by four nuts traversing along two pairs of right and left hand
screws.
Our invention provides a simpler and more effective arrangement, which can be
actuated by a single screw, or as we prefer a right and left banded screw, one half
of its threads being formed at each end of a single rod. This single rod with a screw
or screws formed on its ends, works in a nut or nuts, which nuts are attached to
the two extremities of a system of levers, jointed and arranged on the principle of
the "Lazy tongs." Some of the levers of the "Lazy tongs" consist of flat plates
extending the entire width of the system, thereby securing rigidity to the whole
arrangement.
The system of levers may be arranged to work horizontally or vertically, and is
applicable to other purposes where a steady rise and fall is required.
Dated this 22nd day of April 188k
HENRY PATTMAN TRUEMAN,
JOHN GEORGE NEW.

page_text: HENRY PATTMAN TRUEMAN and JOHN GEORGE NEW of 78 Parade, Birmingham,
in the County of Warwick, Engineers and Machinists, do hereby declare the nature
of our invention for IMPROVED DEVICE FOR RAISING AND LOWERING MUSIC
STOOLS AND SEATS AND FOR LIKE PURPOSES and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement :-
This has hitherto been effected by inclined planes, screws, and also by a system
of links actuated by four nuts traversing along two pairs of right and left hand
screws.
Our invention provides a simpler and more effective arrangement, which can be
actuated by a single screw, or as we prefer, to a right and left-handed screw, one
half of its thread being formed at each end of a single rod. This single rod with a
screw or screws formed on its ends, works in a nut or nuts, which nuts are attached
to the two extremities of a system of levers, jointed and arranged on the principle
of the "Lazy tongs." Some of the levers of the "Lazy tongs" consist of flat plates
extending the entire width of the system, thereby securing rigidity of the whole
arrangement. The system of levers may be arranged to work horizontally or
vertically and is applicable to other purposes where a steady rise and fall is
required. In order that our invention may be fully understood and carried into
operation, we will describe the accompanying sheet of drawings, made to a scale of
about 6 inches to a foot and marked with letters of reference. Fig 1 is a side
elevation of the movement in a raised position. Fig 2 is a side elevation of tho
same in a lowered position. Fig 3 is a plan of the movement. Similar letters
indicate the same parts throughout the drawings.
A. Figs 1. 2 & 3 is a right and left handed screw which passes through nuts B.
which said nuts are attached to the two frames. C. C.-D D d. d. are levers of the
same length as the end elevation of the frames or plates. C. C. jointed or pivotted to
each other at e. f. g. h. E F are two plane surfaces shewn only in Fig 1 & 2 G aro
knobs or handles by means of which the scrow A is, revolved. I. J. lettered only in
Fig 1 & 2 are bearing blocks pivotted at & by means of which the whole system
of plates or frames C and levers D. D. d. d. are rigidly connected with the plane
surface E. F. It is evident that on turning the knobs. G. that the nuts B will
traverse the screw A. and bring the system of plates and levers into the position
shewn in Fig 1. or the position indicated in Fig 2. It is also evident that the plane
surfaces E. F. are brought nearer together or placed further apart by the extension
or contraction of the Lazy tong system of levers. C. C. D. D. fig 1 & 2. In place
of the right and left hand screw, a screw having only a single thread, which may
be either a right or left hand thread, may be employed, but in this case the screw
will not always remain in the centre of the system, and the plain or unscrewed end
will be retained in one of the nuts B by a pin or groove.
In applying our invention to music stool seats, the lower plate F is connected to
supports or legs, and the top plate E is attached to a seat or its equivalent, which
seat will be raised or lowered by the act of turning the screw. G. Our invention is
also applicable to any purpose where it is desired to raise or lower a plane surface
with a steady parallel motion hence it is peculiarly adapted to machine tool tables,
circular saw benches and similar machines.

page_text: 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 is
A systom of plates in combination with levers arranged upon the principle of the
lazy tongs and operated by a screw or scrows as and for the purpose hereinbefore
described and illustrated by the drawings.
HENRY PATTMAN TRUEMAN.
JOHN GEORGE NEW.