IMPROVEMENTS IN THE CONSTRUCTION AND ARRANGEMENT OF WEIGHING CHAIRS AND IN APPARATUS CONNECTED THEREWITH."
Year: 1877

page_text: LETTERS PATENT to Thomas Henry Ellis and Henry William Ayres, both of
Owen's Road, Islington, in the County of Middlesex, for the Invention of
"IMPROVEMENTS IN THE CONSTRUCTION AND ARRANGEMENT OF WEIGHING
CHAIRS AND IN APPARATUS CONNECTED THEREWITH."
PROVISIONAL SPECIFICATION left by the said Thomas Henry Ellis and
Henry William Ayres at the Office of the Commissioners of Patents on the
29th March 1877.
THOMAS HENRY ELLIS and HENRY WILLIAM AYRES, both of Owen's Road,
Islington, in the County of Middlesex. “IMPROVEMENTS IN THE CONSTRUCTION
AND ARRANGEMENT OF WEIGHING CHAIRS AND IN APPARATUS CONNECTED
THEREWITH."
This Invention consists in improvements in the construction of weighing chairs
and in arranging the same in connection with an electrical apparatus, whereby the
chair is rendered more steady and allows of the application of an electric current
to the occupier of the chair when the latter is not placed in gear for the purpose of
weighing.
The chair, the body of which is of the ordinary construction, is mounted on one
arm of the weighing apparatus, the other arm of which is provided with the usual
appliances for ascertaining the weight of the person in the chair. The arms of the
chair are constructed either wholly or partially of metal, and may be either hollow
or solid, and the forward ends thereof, which are always of metal, pass through the
seat and are terminated underneath by metal studs, which, when the machine is
not in gear for weighing, rest on metal plates attached to the frame of the machine,
and which plates are placed in connection with the necessary magnetic coil and
battery for obtaining the desired electric current. The chair and balance are raised
into gear for weighing by means of a lever attached to the frame, as will be well
understood by persons conversant with the construction of such apparatus, and on
the weight having been ascertained, and it being desired to apply the electricity
the action of the lever is reversed and the studs on the bottom of chair are allowed
ונ..D

page_text: to come into contact with and rest upon the metal plates above mentioned, and on
the occupant of the chair placing one hand on each of the arms the circuit of the
electric current is completed and he receives the effect thereof.
The strength of the current is regulated as follows:-The coil is arranged in a
vertical position and the head of the core is attached to a screw block which works
up and down on the threads of a rod passing through the frame, and is provided
with a winch handle, wheel, or other suitable contrivance for the purpose of rotating
the same, and thereby causing the core to be inserted into or drawn from the
interior of the coil, and permits of the strength of the current to be increased and
decreased with great facility, and as gradually as may be desired. To the end of
the core is attached a projecting pin, which on the former reaching a certain point
bears upon a portion of the connections and breaks contact with the battery and
destroys the circuit, thereby causing the current to cease.
A dial for indicating
the strength of the current at any time is also placed in connection with and
actuated by the screw block or head of the core.
The weighing apparatus may, when desired, be provided with suitable dials,
whereby the number of persons weighed is registered, as will be well understood.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Thomas Henry Ellis and Henry William Ayres in the Great Seal
Patent Office on the 28th September 1877.
THOMAS HENRY ELLIS and HENRY WILLIAM AYRES, both of Owen's Road,
Islington, in the County of Middlesex. "IMPROVEMENTS IN THE CONSTRUCTION
AND ARRANGEMENT OF WEIGHING CHAIRS AND IN APPARATUS CONNECTED
THEREWITH."
Our said Invention consists in improvements in the construction of weighing
chairs and in arranging the same in connection with an electrical apparatus,
whereby the chair is rendered more steady for weighing purposes and allows of the
application of an electric current to tho occupier of the chair when the latter is not
placed in gear for the purpose of weighing.
The chair, the body of which is of the ordinary construction, is mounted on one
arm of the weighing apparatus, the other arm of which is provided with the usual
appliances for ascertaining the weight of the person in the chair. The arms of the
chair are constructed either wholly or partially of metal, and may be either hollow
or solid, and the forward ends thereof, which are always of metal, pass through the
seat and are terminated underneath by metal studs, which, when the machine is
not in gear for weighing, rest on metal plates attached to the frame of the machine,
and which plates are placed in connection with the necessary magnetic coil and
battery for obtaining the desired electric current. The chair and balance are raised
into gear for weighing by means of a lever attached to the frame, as will be well
understood by persons conversant with the construction of such apparatus, and on
the weight having been ascertained, and it being desired to apply electricity the
action of the lever is reversed and the studs on the bottom of the chair are allowed
to come into contact with and rest upon the metal plates above mentioned, and on
the occupant of the chair placing one hand on each of the arms the circuit of the
electric current is completed and he receives the effect thereof.
The strength of the current is regulated as follows:-The coil is arranged in a
vertical position and the head of the core is attached to a screw block which works
up and down on the threads of a rod passing through the frame, and which rod is
provided with a winch handle, wheel, or other suitable contrivance for the purpose
of rotating the same, and thereby causing the core to be inserted into or drawn
from the interior of the coil, the strength of the current being increased or decreased
with great facility, and as gradually as may be desired. To the end of the core is

page_text: attached a projecting pin, which on the former reaching a certain point bears upon
a portion of the connections and breaks contact with the battery and destroys the
circuit, thereby causing the current to cease. A dial for indicating the strength of
the current at any time is also placed in connection with and actuated by the screw
block or head of the core.
The weighing apparatus may, when desired, be provided with suitable dials,
whereby the number of persons weighed is registered, as will be well understood.
Having thus declared and ascertained the nature of our said Invention, and the
manner in which the same is to be performed, we would observe in conclusion
that what we consider novel and original and therefore claim as constituting the
Invention secured to us by the said herein-before in part recited Letters Patent
are, the improvements in the construction and arrangement of weighing chairs and
in apparatus connected therewith, substantially as and for the purposes herein-before
described and set forth, or any mere inodification thereof.
In witness whereof, wc, the said Thomas Henry Ellis and Henry William
Ayres, have hereunto set our hands and seals, this Twenty-seventh day of
September, in the year of our Lord One thousand eight hundred and
seventy-seven.
THOMAS HENRY ELLIS.
(L.S.)
HENRY WILLIAM AYRES. (LS.)