Year: 1888

page_text: Date of Application, 24th Aug., 1888
Complete Specification Left, 11tn Feb., 1889
Complete Specification Accepted, 30th Mar., 1889
I, FREDERICK THOMAS SCHMIDT, of Hustlergate, Bradford, in the County of York,
Electrician, do hereby declare the nature of this invention to be as follows:-
This invention has for its object, the provision of means by a simple and in-
expensive combination, whereby a reliable, quick, durable and positive switch for
use in electrical appliances may be constructed; one in which a rubbing contact is
secured, all sparkling avoided, and in which it is impossible for the switch arm to
remain in mid-position; thereby ensuring the switch arm to be either positively
or off" that is, positively in or out of circuit when making or breaking contact,
which I accomplish in the following manner.
"
20
onl
"
On a suitable base of insulating material, I mount a lever on a fixed stud, and on
the same or another fixed stud, place an arm, at the outer end of which is a pin
projecting in the same line as the fixed stud. This pin I connect by means of an
expanded spiral spring to another pin on the before mentioned lever, so that on
operating the lever from one position or stop to another, the spiral spring is further
expanded, and at such an angle with the arm, that the latter is pulled from one
terminal connection to the other; the arm being uncontrollable between the terminals,
and held by the spiral spring tight against overhanging flanges formed on the
terminals, thereby ensuring a rubbing contact between the switch arm and terminals
when making or breaking the circuit."
1000
JOHN GILL,
Agent.

page_text: 1, FREDERICK THOMAS SCHMIDT, of Hustlergate, Bradford, in the County of York,
Electrician, 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 has for its object the provision of means by a simple and inexpensive
combination, whereby a reliable, quick, durable and positive switch for use in electrical
purposes may be constructed; one in which a rubbing contact may be secured, all
sparkling avoided, and in which it is impossible for the switch arm to remain in mid
position, thereby ensuring the switch arm to be oither positively "on or off" that is,
positively in or out of circuit when making or breaking contact; and consists in
mounting a lever on a fixed stud and connecting the lever by a spiral spring to an
arm which on operating the lever from one position to another, the spiral spring is
expanded and moved to such an angle with the arm that it is pulled from one terminal
to the other, the arm being held tight against overhanging flanges by the before
mentioned spring; and the terminals connected by a piece of insulating material for
reducing the possibility of sparkling, and guiding the arm from one terminal to the
other.
In describing my invention more in detail, reference is made to the accompanying
drawings in which,
Fig. 1. represents a view of my improved switch with the arm in contact with one
terminal.
Fig. 2. a similar view with the arm in contact with the other terminal.
Fig. 3. a side view, and,
Fig. 4. a plan of the same.
On a suitable base of insulating material A. I mount a lever B. on a fixed stud C,
and on the same or another fixed stud may be placed an arm D. near to the outer end
of which is a pin E. projecting in the same direction as the fixed stud C. The pin E.
is connected by means of an expanded spiral spring S to another pin F. on the before
mentioned lover, so that on operating the lever from one stop pin G. to another G¹
or vice-versa, the spiral spring S. is further expanded and the angle of the same in
relation to the arm D. so altered, that the latter is pulled from one terminal T. to
another T as the case may be; the arm D. being uncontrollable between the ter-
minals, and is held by the spiral spring S. tight against the overhanging flange K, of
the respective terminals thereby ensuring a rubbing contact between the switch arm
and terminal when making or breaking contact-but as will be well understood, my
invention may be carried out without the flanges K. however in any case in order to
prevent the possibility of sparkling, and in addition, to avoid any locking of the arm D.
on the fixed stud C. by reason of the position in which the spiral spring S. is placed ;

page_text: I connect the two terminals T. and T¹ by a piece of insulating material M. which
acts as a stay to the arm D. and entirely avoids or reduces the possibility of sparkling
to a minimum.
Having now particularly described and ascertained the nature of my inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. An electrical switch constructed substantially as shown and described combined
with a piece of insulating material M. placed between and connecting the two
terminals for the purpose described.
JOHN GILL,
Agent.