Improvements in Electric Switches.
Year: 1898

page_text: Date of Application, 6th June, 1898-Accepted, 23rd July, 1898
COMPLETE SPECIFICATION
Improvements in Electric Switches.
I, JOHN GEORGE DIXON, of "Don Villa," Penistone, in the County of Yorks,
Engineer, 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.―
My invention relates to improvements in electric switches of the lever type,
principally employed as main switches, and has for its object to simplify and
cheapen their construction and at the same time provide a switch which shall be
reliable in its action.
In lieu of as heretofore providing two contact making blades on the operating
handle or lever (such blades being moved towards each other against the action of
a spring when moved into the contact making or operated position), I provide one
blade only said blade having a downwardly projecting flange at each side, and
in lieu of only one contact or pole piece on the switch base I provide two, each
of said contacts consisting of a flat or horizontal portion (for screwing to the
base) and two upright projections or flanges each of which is bent over in the
form of a hanger or inverted hook Each of the downwardly projecting flanges
of the contact blade works between one of these contacts or pole pieces, the forma-
tion of which provides the necessary sping for gripping and holding the blade
in the closed position of the switch. Any desuable form of spring is employed
for retaining the switch in the normal or opened position when the switch blade
is released from the contacts or pole pieces.
In order that my invention may be readily understood I will describe it with
reference to the accompanying diawing, in which
-
Figure 1 is a side view of my improved switch and Figure 2 a plan of same
Figure 3 18 an end view of the special form of contact making blade and
Figure 4 an end view of the pole pieces or contacts
The same letters refer to the same parts in the different figures.
a is the switch base of any suitable non-conducting material, b is the switch
handle o lever centred at c in a bearing d e 18 the contact making blade of
special form having downwardly projecting flanges e and the outer ends of
which flanges are clipped and held between the bent over portions f f¹ (Figure 4)
of the contacts or pole pieces g g when the lever b is operated to close the switch
h, Figure 1, 18 a sping for retaining the switch in the normal position. The
dotted lines in Figure 1 show the worked or closed position, of the switch.
The contact making blade e and pole pieces or contacts 9 g¹ are formed by
stamping.
Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is..
as
In an electric switch, a contact making blade such e provided with
flanges ee and contacts or pole pieces g¹ having bent over portions ffl

page_text: (Figure 4) between which each of the flanges of said contact blade moves and is
held when the switch is operated to make contact, substantially as herein set forth
with reference to the accompanying drawing.
Dated this 6th day of June 1898
JOHN P. O'DONNELL, Fel Chart. Inst P A.,
Agent for the said Applicant,
70 & 71, Palace Chambers, Westminster, S W