Certain Improvements in Dials for Watches, Clocks, and other Instruments.
Year: 1894

page_text: Date of Application, 27th Nov., 1894
Complete Specification Left, 23rd Aug., 1895-Accepted, 12th Oct., 1895
PROVISIONAL SPECIFICATION.
Certain Improvements in Dials for Watches, Clocks, and other
Instruments.
We, JOHN HAWLEY, of Cow Lane, Coventry, Watch Manufacturer, and
JOSIAH BRADLEY, of Holyhead Road, Coventry, Engineer, do hereby declare the
nature of this invention to be as follows:-
This invention consists of the hereindescribed improvements in dials for watches
clocks and other instruments our principal object being to so construct the said dials
as to dispense with the usual feet or pillars which have heretofore been employed
for fixing the dial in place. Watch clock and other like dials made in accordance
with this invention are also better protected round the edges so that the enamel is
effectually prevented from chipping.
We will describe this invention as applied to a watch dial.
In carrying out this invention we make the copper or other metal part of the
dial with a rim all round its periphery the said rim projecting slightly at the
frout and also at the back of the dial That part of the rim which projects at
the back of the dial is adapted to fit round the edge of the plate of the watch
movement and is there secured by one or more small screws which passes or pass
through the rim into the edge of the said movement plate. This hack part of
the rim is by preference recessed or shouldered down to the thickness of the
enamel on the back of the dial so that the shoulder will fit and bed properly on the
movement plate.
That part of the said rim which projects at the front of the dial is of about
the same depth as is the thickness of the enamel at the edge of the dial thus
the rim protects the edge of the enamel and effectually prevents the same from
chipping.
In a modification of this invention the said rim projects only at the back of the
dial and does not project in front; and in a further modification instead of making
the dial with a complete rim at the back as stated above the dial is only made with
portions of a rim sufficient for the fixing screws to pass through into the edge of
the movement plate as stated above.
Our said invention is similarly applicable to what are known as "double sunk"
and "single sunk " dials as well as to those in which the face is not sunk. When
applying our said invention to what are known as double sunk dials we make the
copper or other metal disc of the dial with a central sunk circular recess and with
a smaller eccentric circular recess for the seconds hand both of these recesses having
a projecting rim standing up from the face of the dial so as to retain the enamel in
the annular art during the burning. This double sunk dial is by preference
formed from one piece of sheet metal by suitable dies worked in a stamp or press or
the central sunk part may be made separate from the other part of the dial and
secured thereto by the raised edge of the sunk part being closed into a concentric
groove formed in the back of the dial round the central opening.
Dated this 21st day of November 1894.
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.

page_text: Certain Improvements in Dials for Watches, Clocks, and other
Instruments.
We, JOHN HAWLEY, of Cow Lane, Coventry, Watch Manufacturer, and
JOSIAH BRADLEY, of 1lolyhead Road, Coventry, 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:-
This invention consists of the hereindescribed improvements in dials for watches
clocks and other instruments our pincipal object being to so construct the said
dials as to dispense with the usual icet or pillars which have heretofore been
employed for fixing the dial in place. Watch clock and other like dials made in
accordance with this invention are also better protected round the edges so that
the enamel is effectually prevented from chipping.
We will describe this invention as applied to a watch dial and we will refer to the
accompanying drawings on which
Fig. 1 is a cross section of a plain watch dial constructed according to this
invention;
Fig. 2 shews the usual copper blank from which the copper part of the dial
represented in Fig. 1 is formed and Figs. 3 and 4 shew the two stages through
which the dial passes in the formation of the same;
Fig. 5 is a cross section of a single sunk watch dial constructed according to this
invention;
Fig. 6 is a cross section and Fig. 7 is a plan of a double sunk watch dial
constructed according to this invention;
Fig. 8 is a cross section of another form of a plain dial illustrating a modification
of our invention; Fig. 9 illustrates a further modification of the same and
Fig. 10 is a cross section and Fig. 11 is a plan of another form of a double sunk
watch dial constructed according to this invention.
All the figures are drawn on an enlarged scale so as to shew their parts more
clearly.
The same letters of reference indicate the same or corresponding parts in all the
figures.
In carrying out this invention we make the copper or other metal disc part A of
the dial with a rim all round its periphery the said rim projecting slightly at a at
the front and also at a³ at the back of the dial. That part a' of the rim which
projects at the back of the dial is adapted to fit round the edge of the plate of the
watch movement and is there secured by any convenient means as by one or more
small screws which passes or pass through the holes in the rim a into the edge of
the movement plate; or the rim a' may be made to snap on to the movement plate
or be made to screw thereon. This back part a² of the rim is by preference
recessed or shouldered down at a³ as shewn to the thickness of the enamel c¹
on the back of the dial so that the shoulder a³ will fit and bed properly on the
movement plate.
That part a' of the rim which projects at the front of the dial is of about the
same depth as is the thickness of the enamel c at the edge of the dial thus the
rim a protects the edge of the eLamel and effectually prevents the same from
chipping.
This
We make the rim a' a' in a piece with the disc part A of the copper dial.
can readily be done by press tools (forming no part of this invention) which by one
stroke of the press first cut out the plam blank as shewn in Fig. 2 and then raise up
the edge all round as shewn in Fig. 3 and finally set back the blank A within the
rini a' so that the rim will project ou both sides and have the appearance represented

page_text: by cross section in Figs. 1 to 4. As these press tools do not form any part of this
invention it is not necessary to describe them here.
In the modification of this invention shewn by Fig. 8 the said rim projects only
at the back of the dial and does not project in front so that in this case we have
the advantage of fixing the dial on to the movement plate without the usual fect
but there is no protection to prevent the chipping of the edge of the enamel as there
is when the rim al projects at the front of the dial as in Fig. 1.
In a further modification of our invention instead of making the dial with a
complete rim a² at the back as stated above and shewn in Figs. 1, 4, 5, 6, 8 and 10
we make the dial with only portions of a rim a² as shewn by Fig. 9 sufficient to fit
round the edge of the movement plate as stated above and for the fixing screws to
pass through the holes b therein.
Our said invention is similarly applicable to what are known as single sunk and
double sunk dials as well as to those in which the face is not sunk. Fig. 5 shews
our invention applied to a single sunk dial by which it will be seen that the rim a¹ aª
is formed in the manner above described and that the dial is practically the same
as the plain dial except that it has a sunk hole D for the seconds finger and the
usual small dial E ground and fitted therein.
The double sunk dial shewn by Fig. 6 is also made with a projecting rim a' at
the front and a rin a² at the back of the copper the same as in a plain dial shewn
by Fig. 1 the small or centre dial F and the seconds dial E being fitted and ground
therein in the usual way.
According to another method of making a double sunk dial in accordance with
this invention we make the copper or other metal disc A of the dial with a central
sunk recess A and with a small eccentric circular recess A² for the seconds finger
both of these recesses having a projecting rim (marked respectively a a) standing
up from the face of the dial so as to retain the enamel in the annular part A of
the dial and the enamel on the central sinking A' and the enamel c* on the
smaller sunk dial A during the burning. This double sunk dial is by preference
raised from one piece of sheet copper or other suitable metal by dies worked in a
stamp or press which form no part of this invention; or the central sunk part A¹
of the dial may be made separate from the other part A of the dial and secured
thereto by a raised edge of the sunk part being closed into a concentric groove
formed in the back of the dial A round the central opening of the same.
Having now particularly described and ascertained the nature of our said
invention and in what manner the same is to be performed we declare that what
we claim is :-
1. The hereindescribed improvement in dials for watches clocks and other
instruments whereby the dial feet are dispensed with, said improvement consisting
in making the copper or other sheet metal part of the dial with a projecting rim
such as a round or partly round the back thereof to fit round the edge of the
movement plate, substantially as herein described.
2. The hereindescribed improvement in dials for watches clocks and other
instruments whereby the edge of the enamel on the face of the dial is prevented
from chipping, said improvement consisting in making the copper or other sheet
metal part of the dial with a projecting rim round the front thereof to the depth of
the enamel, substantially as herein described.
3. Dials for watches clocks or other instruments made with a projecting rim such
as a round the front to protect the enamelled face thereof and with a projecting
rim such as a around or partly round the back of the dial to fit round the movement
plate, substantially as herein described.
4. Dials for watches clocks or other instruments made with a projecting rim such
as a round the front to protect the enamelled face thereof and with a projecting
rim such as a around or partly round the back of the dial to fit round the movement
plate said rim being shouldered down as at a³ to fit on the face of the said movement
plate, substantially as herein described.

page_text: 5. The improved double sunk dial constructed substantially as herein described
and illustrated by Figs. 10 and 11 of the accompanying drawings.
Dated this 22nd day of August 1895.
CHARLES BOSWORTH KETLEY,
Agent for the Applicants.