Improvements in Swing Break Switches for Electric Currents.
Year: 1899

page_text: Improvements in Swing Break Switches for Electric Currents.
I, JOSEPH JOHN Walklate, of 116, Moseley Road, Birmingham, in the County
of Warwick, Civil Engineer, do hereby declare the nature of this invention to be
as follows:-
It relates to the blade and the spring or springs for actuating the quick break
and its object is to provide better contact and to prevent the switch opening
accidentally owing to vibration or other causes. To enable this to be attained
the blade (in the case, for example, of a small switch) may be of U shape with
the arms extended slightly beyond the axis of the switch on the opposite side
to the contacts, such axis being formed of trunnions on the outer sides of the
arm of the U blade.
An ordinary coil spring, having its one end attached to a pin connecting the
two endended arms of the blade and its other end fixed to a point on the pedestal
or base of the switch on that side of the axis nearest to the contacts, is so
arranged, that, when the blade is in the contacts the line of the spring is clear
of the axis of the switch and on that side nearest the contacts and is, conse-
quently, pressing the blade in the contacts. When it is required to open the
switch the blade is moved, by means of a loose handle, until the end of the spring
attached to it has radiated round the axis sufficiently to move the centre line of
the spring clear of such axis on the side away from the contacts, when the tension
of the spring would pull the blade out of the contacts and hold it clear untit
forced back again by the handle.
1111
1800
Improvements in Swing Break Switches for Electric Currents.
I, JOSEPH JOHN WALKLATE, of Park Lane, Kidderminster, in the County of
Worcester, formerly of 116, Moseley Road, Birmingham, in the County of War-
wick, Civil 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
n and by the following statement:-
-
This invention relates to the blade of a switch and to the spring or springs for
actuating a quick break and will be better understood by reference to the attached
drawings.
Fig. 1 is a plan view of a switch constructed in accordance with my invention.
Fig. 2 is a side elevation of the same switch.

page_text: The blade or shaped brush A has its two arms extended slightly beyond the
axis B of the switch in the opposite direction to the contacts C. The ends of these
arms of the blade A are connected together by a bar D from the middle of which
is stretched a spring E the other end being attached to the eye F fixed to the
pedestal or base of the switch. The relative position of the bar D to the eye F
is such that when the blade A is in the "on" position in the contacts C, as shewn
by full lines on Fig. 2, the line of the spring E, stretching from D to F', is above
the axis B, thus tending to, hold the blade in the contacts. To throw the blade
out of the contacts, the swivel handle G is pressed against the extended arms of
the blade A until the bar D has radiated round the axis B so that the line of
the spring E, stretching from D to F, is below the said axis B, as shewn in
dotted lines on Fig. 2, when it will cause afslíarp release of the blade from out
of the contacts C.
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 :
The use for obtaining a quick break in electric switches of a spring or springs
in tension, having one end attached. to a fixed point, and the other
to a lever forming part of the blade so that it alters, the direction
of the pull of the spring on the blade from a downward direction.
tending to force the blade further into the contacts, and make better
contact, when the switch is in the "on" position to an upward direction tending
to give a quick break and to move the blade further away from the contacts and
to hold it clear of the said contacts when the switch blade. is moved into the
off" position.
"
Tata. this 10th day of Doomhan 1800