Improvements in Watch Case Springs.
Year: 1892

page_text: COMPLETE SPECIFICATION.
Improvements in Watch Case Springs.
1, ADOLPHUS JOHN LUSTIG, of 359 Mulberry Street, in the City of Newark,
County of Essex and State of New Jersey, United States of America, Inventor
and Manufacturer, do hereby declare the nature of my invention for "IMPROVE-
MENTS IN WATCH CASE SPRINGS," and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement :-
The present invention set forth in detail hereinafter, relates to improvements in
watch-case springs, the invention being designed to provide a simple and easy
means for securing the case spring within the watch case.
The invention is illustrated in the accompanying sheet of drawings, in which
similar letters of reference are employed to indicate corresponding parts in each of
the several views.
In said views,
Figure 1 is a vertical section of a watch-case with my improved spring attached,
clearly illustrating the manner of securing the spring in position by means of a
saddle or block.
Figure 2 is a front elevation of the spring and
Figure 3 is a
dotted lines.
Figures 4 and
and
top view of the same, the saddle or block being indicated in
are a front view and plan of a slightly modified form of spring,
Figure 6 is a view similar to that shown in Figure 1 illustrating the manner of
securing the spring shown in Figures 4 and 5, within the watch case.
Figures 7 and 8 are views similar to Figures 5 and 6, illustrating still another
modified form of securing the watch-case spring in which the use of the saddle or
block is entirely dispensed with.
In the drawings, A indicates the watch-case which is of any ordinary
construction, a is my improved spring, bent to conform with the contour of the
watch-case, and provided with a centrally arranged recess or cut-away portion a¹
and provided with the usual tongue a adapted to press against the lid or cover of
the case and operate the same in the usual manner.
The spring is secured within the case by means of a saddle or block 6 provided
with a slot into which the spring a is fitted so that said saddle 6 projects down
on opposite sides of the spring, the edges a³ and a of the recess a¹ preventing the
displacement of the spring when in position in the slot in the saddle or block.
I secure
Said saddle is provided with a threaded hole band by means of a screw c,
said saddle or block to the casing, as clearly shown in Figure 1, and hence the
spring is properly held in its position and successfully operates the lid or cover of
the watch-case.
In Figures 4, 5 and 6, I have illustrated a modified form of construction, in
which, I bend that portion of the spring directly beneath the recess a³, backwardly
at as, into which the saddle or block b may be fitted, as clearly shown in said
Figures 5 and 6. In this case I avoid the use of a slot in the saddle, which is
secured within the case by means of a screw e in the same manner, as has just been
described.
My improved watch-case spring is also provided on its under side with the
second cut-away or recessed portion a³, whereby the spring is much narrower at its
middle than at its immediate connecting portions. This is of great advantage in
the form of spring provided with a backwardly bent portion a', which must

page_text: project upon the narrow space or rim of the watch-case centre, as will be
evident.
Instead of securing the spring shown in Figures 4 and 5 in the above described
manner, can entirely dispense with the use of the saddle; as illustrated in
Figures 7 and 8, the pin or screw e is made to enter in front of the depression a
in the spring, which causes the latter to be held in position in the case between
said screw and the inner surface of the watch-case, as will be evident from
Figure 8.
Heretofore it has been the practice to provide the steel springs in their edges
with a threaded perforation into which the screw c is fitted to secure the spring
within the case. This has been difficult to make, and in tempering the spring the
threaded perforation would very often become damaged.
In my present invention there are no holes in the spring, such holes being made
in the saddle which in this case can be made from soft metal and hence more
readily drilled.
Thus I have devised a very cheap and sure means for securing the spring within
the watch-case, whereby the spring action of the tongue end readily forces open
the lid or cover when the crown of the watch-case has been depressed.
From Figures 2 and 4 it will be seen that the spring is provided with a cut-away
portions a and a', which are essential in enabling the steel spring to be bent into
the proper curve whereby said spring is caused to conveniently rest above the
movement of the watch.
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. A watch case spring provided with a backwardly bent portion, in combination
with a saddle or block adapted to fit in said backwardly bent portion, a threaded
perforation in said saddle or block, and a screw for securing said saddle or block to
the watch-case, substantially as and for the purposes set forth.
2. A watch-case spring consisting of an arc-shaped spring, bent to conform
with the contour of the watch-case, and having a tongue at one end, and a
centrally disposed recessed portion a', and bent backwardly, as at a³ toward the
rim of the watch-case, as set forth.
3. The combination of a watch-case, of a spring having a tongue at one end and
a centrally disposed recessed portion, bent backwardly, as at a, toward the inner
face of the rim of the watch-case, and means for securing said spring in position,
substantially as and for the purposes set forth.
4. A watch-case spring provided with a backwardly bent portion, extending
toward the inner face of the rim of the watch case, bent at right angles, or
approximately so, substantially as set forth.
5. A watch-case spring provided with a backwardly extending bend at some
point in its length, said bend being greatly reduced in width as compared with the
width of the spring, as and for the purposes set forth.
6. A watch-case spring consisting of an arc-shaped spring having a tongue at
one end and oppositely and centrally disposed recessed portions a' and as, bent
backwardly, as at a, whereby said portion is adapted to project into the narrower
portion of the watch-case centre, as and for the purposes set forth.
NA NI IT CA
1001
ADOLPHUS JOHN LUSTIG.
Haseltine, Lake & Co.,
45, Southampton Buildings, London, Agents for the Applicant.