Year: 1897

page_text: I, ALFRED CHARLES BROCKIES, of 67, Fenwick Road, East Dulwich, in the
County of Surrey, do hereby declare the nature of this invention to be as follows:-
The object of this invention is to simplify and improve the construction of what
are known as tumbler switches.
The fixed contacts consist of two plates fixed to the base plate and bent up at
right angles to it. Each of these plates is provided with a binding screw, one of the
circuit wires being held by one, and one end of a fuse wire by the other. The other
end of the fuse is held by a screw on a third plate fixed to the base and also provided
with another screw for the other circuit wire. The moveable contacts are the ends
of a U shaped plate one edge of this plate being pivotted on each side close down
onto the base plate. This edge is cut away on each side of the pivots so that the
plate can rock through a considerable angle. The sides of the other edge of the
plate are connected by a spindle insulated from it and parallel to the pivots the ends
of this spindle being connected to the base plate by helical springs which tend to
pull either the contact ends of the U or its bend towards the base plate according to
the side to which it is rocked from its central position, by this means the switch is
firmly held in its closed or open position as the case may be.
Fixed to the base are the ends of a plate bent to form a bridge piece and carrying
a socket for the ball upon the switch handle or lever. This lever passes through a
hole in the socket and bridge piece, its end being forked to embrace the spindle.
The outside of the socket has a screw thread upon it for the attachment of the
cover.
I, ALFRED CHARLES BROCKIES, of 67, Fenwick Road, East Dulwich, in the
County of Surrey, 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: -
The object of this invention is mainly to simplify and improve the construction
of what are known as tumbler switches but it is also applicable to other forms of
rocking switches.

page_text: tumbler switch made according to this invention. In these figures the usual hemi-
spherical cover is omitted and in Figure 3 also the bridge piece and switch handle.
Figures 4 are a plan and front elevation of one of the fixed contacts a.
Figures 5 are a plan and side elevation of the movable contact e.
Figures 6 are front and side elevations of one of the sleeves h.
Figures 7 are side and front elevations of the lever 7.
The fixed contacts are of ordinary construction and consist of two plates a fixed
to the base plate 6 of non-conducting material and bent up at right angles to it.
Each of these plates is provided with a binding screw a¹ one of the circuit wires
being held by one, and one end of a fuse wire c by the other. The other end of the
fuse is held by a screw d' on a third plate d fixed to the base b and also provided
with another screw d for the other circuit wire. The moveable contacts are the
ends of a shaped plate e one edge of this plate being pivotted on each side close
down onto the base plate. This edge is cut away on each side of the pivots so that
the plate can rock through a considerable angle. The pivots consist of pins f¹
projecting from the sides of a bolt or screw f fixed to the base b. The sides of the
other edge of the plate are connected by a spindle g insulated from it by two
vulcanite sleeves and parallel to the pivots the ends of this spindle being connected
to the base plate 6 by helical springs ; which tend to pull either the contact ends
of the U or its bend towards the base plate according to the side to which it is
rocked from its central position, by this means the switch is firmly held in its closed
or open position as the case may be.
Fixed to the base are the ends of a plate k bent to form a bridge piece and carry-
ing a socket for the ball upon the switch handle or lever . This lever passes
through a hole in the socket and bridge piece, its end being forked to embrace the
spindle g. The outside of the socket has a screw thread ¹ upon it for the attach-
ment of the cover.
Having now particularly described and ascertained the nature of my said in-
vention and in what manner the same is to be performed, I declare that what I
claim is:-
1. Rocking switches with tensional springs having their ends attached to the
bases and to the movable contacts the pivots of the latter being at the two extreme
positions on different sides of the springs, substantially as described.
2. Rocking switches in which the movable contacts tend to keep in one or other
of their two extreme positions and are operated by forked levers embracing pins
carried by them, substantially as described.
3. Rocking switches in which the movable contacts consist of U shaped conduct-
ing plates and are operated by forked levers embracing pins across the U's and
insulated from them, substantially as described.
4. Rocking switches substantially as described and shown in the drawings.
Dalhin noth das of Mar 1907