An Improved Electric Contact for Use with Olocks and the like.
Year: 1895

page_text: PROVISIONAL SPECIFICATION.
An Improved Electric Contact for Use with Olocks and the like.
I, GEORGE WALL 10 Nairn Street Poplar E. Electrician, do hereby declare the
nature of this invention to be as follows:-
This invention relates to an improve electric contact for use with clocks and
the like, the object being to provide a ready means of adjusting the position of said
contact so that a bell or alarum may be rung at a desired time.
I provide a ring of nonconducting material which carries two terminals of flexible
or elastic material; the hand of the clock when passing over these terminals will
close the electric circuit by causing the two terminals to touch. The ring which
carries these terminals or contact springs is carried upon an inner ring or support
which is secured to the face or dial of the clock. The outer ring may be rotated
upon the inner ring or support & thus the circuit will be closed when the hand
passes over the contact pieces.
.
Dated this 24th day of September 1895.
COMPLETE SPECIFICATION.
An Improved Electric Contact for. Use with Clocks and the like.
I, GEORGE WALL, 10 Nairn Street, Poplar E. Electrician do hereby declare
the nature of this invention and in what inanner the same is to be performed,
to be particularly described and ascertained in and by the following statement :-
This invention relates to an improved electric contact for use with clocks and
the like, the object being to provide a ready means of adjusting the position of said
contact, so that a bell or alarum may be rung at a desired time.
I provide a ring of nonconducting material which carries two terminals of
flexible or elastic material; the hand of the clock when passing over these
terminals will close the electric circuit by causing the two terminals to touch. The
ring which carries these terminals or contact prongs, is carried upon an inner ring
or support which is secured to the face or dial of the clock. The inner ring may
be rotated upon the outer ring of support, thus the circuit can be closed when the
hand presses on the contact pieces.
Referring to the annexed drawings,
Figure 1 is a front view of my invention applied to a clock face.
Figure 2 section through line a-y Fig. 1 to enlarged scale.
Figure 3 plan to enlarged scale showing springs or contact pieces.
a is a rim of metal connected to an inner disc or ring b by a disc or plate of
non conducting material c such as vulcanite. This ring b carries the ring d which
may be revolved by the pointer e attached to same; to this pointer e is attached
the springs or contact pieces f & 9 the spring 9 having connection with the rim a
through the medium of the pin h which touches or rests upon the ring a i being a
piece of indiarubber; when these springs ƒ & g are brought into connection with

page_text: one another, by the hand of the clock pressing upon the spring,f, the circuit of an
electric current is closed, the current passing from the outer ring a by way of the
springs f&g to the inner ring b which is connected with the battery.
It will be seen that so long as the hand of the clock continues to press upon
the contact piece f, the bell or alarum will ringrattthe predetermined time.
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 combination, the improved arrangement for enabling an electric bell to be
rung by the hand of a clock at the desired time substantially as herein described
and illustrated.
1
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