Improvements relating to the Application of Electricity in connection with Chairs known as Dental Chairs for Carrying Out Dental and other Surgical Operations.
Year: 1892

page_text: Date of Application, 29th July, 1892
Complete Specification Left, 29th May, 1893-Accepted, 1st July, 1893
PROVISIONAL SPECIFICATION.
Improvements relating to the Application of Electricity in connection
with Chairs known as Dental Chairs for Carrying Out Dental
and other Surgical Operations.
I, CHARLES FREDERICK ROWLEY, of Rose Cottage, Strand on the Green,
Chiswick, Gentleman do hereby declare the nature of this invention to be as
follows:-
My invention relates to improvements in connection with the employment of
electricity, for producing anesthesia when carrying out certain surgical operations
and primarily, dental operations.
In accordance with my invention and taking the case of the above referred to
primary application of same; I procced as follows:-That is to say. In connection
with a dental chair, I mount upon each arm of same in an upright position a handle
for the patient to hold. These handles are connected to the battery (which is
placed on the floor and exposed to view) by loose wires. I also employ a small
electric push which is placed in the floor on any side of the chair, so as to ensure
my ability to control the electric current to the patient, through the dental chair
which forms both positive and negative elements.
Although I have herein referred to and described my invention in connection
with electro-dental operations proper such as teeth extraction, it may with
advantage be employed for producing anesthesia when performing other surgical
operations.
Dated this 22nd day of July 1892
JAMES STEVENSON,
Gray's Inn Chambers, 20, High Holborn, London, W.C.,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements relating to the Application of Electricity in connection
with Chairs known as Dental Chairs for Carrying Out Dental
and other Surgical Operations.
I, CHARLES FREDERICK ROWLEY, of Rose Cottage, Strand on the Green,
Chiswick, Gentleman, 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 improvements in connection with the employment of
electricity for producing anesthesia when carrying out certain surgical operations
and primarily dental operations.
According to my invention and when applying the same to the extraction of
teeth, I proceed as follows 1 take an ordinary dentists chair and mount upon each
arm of the same in an upright position a handle for the patient to take hold of when
undergoing the operation. These handles are connected by loose wires to a suitable
electric battery placed on the floor; and, exposed to view; and, in connection with
this battery is a small electric push or switch fixed in or upon the floor at one side
of the chair. By means of this switch the operator can control the current passing
from the battery to the patient through the dental chair, which latter forms both
positive and negative elements, the forceps or other operating instruments is con-
nected by means of a loose wire with one of the aforesaid handles which constitute
either a positive or negative electrode. And in order that my said invention may

page_text: be more fully understood I will describe the same with reference to the accom-
panying sheet of drawings in which
Figure 1 is a perspective view of an ordinary dental chair with my improvements
applied thereto; and,
Figure 2 is a front view of the same.
C represents the chair and c. c are two metal handles forming electrodes connected
to the outer ends of the arms of the said chair. a is an electric battery of any
suitable construction placed upon the floor on one side of the chair; and, exposed
to view as shewn. This battery is connected by means of the loose wires d. d to
the two handles c. c¹. b, is a small electric push or switch connected with the
battery so that the current from the latter to the patient may be suitably controlled
by the operator; who for this purpose may press his foot upon the spring push or
button ¹. A loose wire is connected at one end to the handle or electrode c¹ and
at the other end to the forceps or other surgical instrument.
The operation is as follows. The patient being seated in the chair catches hold
of the handles c. cl the operator then presses on the push button 6 which causes
the current from the battery a, to pass along the wires d. d' through the handles c. c¹
to the body of the patient. The forceps or other instrument is now brought into
use and the current passing along the wire d' to the said instrument causes the part
being operated upon to be numbed thereby rendering the patient insensible or
partially so, to the pain caused by such operation.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is.
1. In the treatment of patients undergoing dental or surgical operations the
combinations of the handles c. c¹ the battery a. the wires d. d' and the electric push
or switch with an ordinary dental chair substantially as described and for the
purpose specified.
2. The improved apparatus for producing anesthesia substantially as described
and shewn in the accompanying drawings.
Dated this 29th day of May 1893.
JAMES STEVENSON,
20, High Holborn, W.C., Agent for Applicant.