An Improved Watch-key.
Year: 1893

page_text: Date of Application, 4th Feb., 1893
Complete Specification Left, 4th Nov., 1893-Accepted. 9th Dec
1803
PROVISIONAL SPECIFICATION.
An Improved Watch-key.
I, MARK CROSS, of 5 High Street, Bristol, Watch-maker, do hereby declare the
nature of this invention to be as follows:-
This invention consists in a watch-key capable of adjustment to fit watch arbors
of different sizes. The key, which
form of construction, of two arms or limbs united at one end and, at the other,
preferably made of steel, consists, under one
forming a divided jaw for gripping watch arbors. Across the jaw, at a suitable
distance from the extremity of the instrument, extends an adjusting screw by
turning which in the proper direction the jaw is opened and closed, at will, so that
it may be adjusted to fit on and grip the arbors of any watch and enable the same
to he turned thereby.
Under a modification the arms are separately made and are joined towards the
front by a pivot pin. The adjusting screw is in this case situated towards the
rear end of the arms.
Dated this 3rd day of February 1893.
NICHOLAS WATTS,
Chartered Patent Agent.
COMPLETE SPECIFICATION.
An Improved Watch-key.
I, MARK CROSS, of 5, High Street, Bristol, Watch-maker, 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 consists in a watch-key capable of adjustment to fit watch arbors
of different sizes. The key, which is preferably made of steel, consists of two
arms or limbs united at one end and, at the other, forming a divided jaw for
gripping watch arbors. Across the jaw, at a suitable distance from the extremity
of the instrument, extends an adjusting screw by turning which in the proper
direction the jaw is opened and closed, at will, so that it may be adjusted to fit on
and grip the arbors of any watch and enable the same to be turned thereby.
Referring to the accompanying sheet of drawings, Fig. 1 represents a side view
and Fig. 2 an end view of my improved watch-key.
The key is composed of two trough-shaped arms or limbs a and b of which a
overlaps b. The arms or limbs a and b are made in one piece of metal bent at one
end to constitute a spring. At the other end the arms are furnished with steel
jaws. An adjusting screw e fixed in the lower arm 6 works in the arm a as a nut.
The two arms a and b constantly tend to spring apart at the jaws. The extent to
which they are permitted so to do is governed by the adjusting screw e by which
the jaws are adjusted to fit on to watch arbors of different sizes.
Having now particularly described and ascertained the nature of my said inven-
ion, and in what manner the same is to be performed, I declare that what I
laim is :-
A watch-key consisting of two spring arms made in one piece bent to give the
ecessary elasticity, one of which arms is capable of being folded within the other,
oth arms tending constantly to spring apart at the jaws and fitted with o no.

page_text: screw for controlling and varying the extent to which the jaws may open,
substantially as hereinbefore described with reference to the accompanying sheet of
drawings.
Dated this 3rd day of November 1893.
NICHOLAS WATTS,
Chartered Patent Agent.