Improved Detachable Mountings for Jewel Pivots for Use in Watches and Apparatus for Manufacturing the same.
Year: 1899

page_text: Improved Detachable Mountings for Jewel Pivots for Use in Watches
and Apparatus for Manufacturing the same.
I, RUDOLF WEBER, of Laibach, Bohemia, in the Empire of Austria, 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 has for object to produce detacheable and replaceable mountings
or sockets for jewels, such as rubies and the like, which serve for pivots in
watches, chronometers and similar time pieces, and to provide an apparatus by
the aid of which such mountings can be manufactured with great economy in
time and material and with great exactitude and neatness.
Hithero the bed for receiving the pivot jewel was usually cut into the metal
of the respective portion of the watch and the jewel was held in the said bed
by means of a small cap or slip. In case of the device becoming defective and
requiring repair or replacing, the part had to be cut out, a piece of brass or other
suitable metal had to be soldered in, and the new bed had to be drilled, an
Furthermore
operation of great delicacy and requiring much time and skill.
the gilding or other plating of the respective parts of the time piece is necessarily
more or less tarnished and spoiled by heat and the new part itself is left without
any plating at all.
In order to simplify the aforesaid operation and admit of easily and expe-
ditiously fitting a new mounting or jewel bed without damaging the plating of
the respective component part of the frame of the watch, I provide separate
mountings or bed pieces for receiving and securely holding the jewel, which
mountings are made to fit into a plain circular hole cut into and through the frame
part, and are adapted to be rigidly fixed in place by the simple operation of
bending a small annular flange against the surface of the frame part, while the
bending of a similar second flange against the surface of the jewel secures the
latter in place. A laterally projecting flange at the other end of the mounting
or bed piece is made to bear against the other side of the frame part, thus
effectually preventing the bed piece from becoming detached or working loose.
It is obvious that by simply bending back the aforesaid annular flange the bed
piece can be removed from the frame part without damaging the gilding or
plating of the latter, and the detacheable mountings being gilded or otherwise
plated before use, the whole presents a perfectly finished appearance.
Reference being had to the accompanying drawings throughout the figures of
which like letters denote like or corresponding parts
Fig. 1 is a side elevation of the drilling frame and guide plate attachment
specially designed for cutting the mountings or bed pieces.
Fig. 2 is a front view of the same.
Fig. 3 is a plan view of a portion of the templet plate frame and,
Fig. 4 a vertical section of the same along line ay (Fig. 3) a metal plate
being shown in position between the two templets.
Figs. 5, 5, 6 and 6 illustrate respectively in front view and side view and
partial section the cutting tools, and their holders secured to the drilling chuck.

page_text: Fig. 7 shows the various bits or chasers composing the cutting device for the
upper portion of the mounting or bed piece and
Fig. 7, the cutting device for the lower portion.
Fig. 8 illustrates in vertical section two different types of mountings or jewel
bed pieces and Fig. 9 the same mountings when holding the pivot jewels and
attached to the frame part. For the sake of clearness I have considered it
expediant to use various scales in the different figures of the drawings, the
relative proportions of the parts illustrated being made clear by the following
description.
The drilling device Fig. 1 essentially consists of frame or poppet A, spindle a,
fixed pulley b, loose pulley c and pivot screw d, the whole device being held in
the known adjustable socket piece.
The guide plate attachment consists of bifurcated plate e secured to the face
of the poppet by means of screws el o¹, spring connections g, and face plate f, the
latter having a piece cut away halfway down the centre (Fig. 2) to admit of the
passage of the drill holder h in which are secured the various cutting tools
(Figs. 5, 5, 6 and 6) required for cutting the required shape of mount.
Templet plates k and with an interposed plate m of the material from which
the mountings are to be cut (Figs. 3 and 4) are fastened together by means of
screws. The plate is first applied to plate f and the cutting device composed
of chasers or cutting tools 1, 2 and 3, held in holder h on chuck a', is allowed to
successively enter the holes n, in the said templet plate k and cut the metal of
the interposed plate m.
The depth of the cut is determined by the spring connections g, wound on a
guide pin between sleeve pieces g¹ and g², so that when the said sleeve pieces g¹
and are forced into contact by pressing back the plate f by means of templet
frame Km being tightly laid against it, the cutting device will enter the metal
of plate m to a certain depth, and finish the lower part of the mountings i.e. the
sharp annular flanges (Fig. 8) and at the same time cut the central hole into the
bottom plate of said mounting.
A second cutting device consisting of a tool having chasing edges 4, 5 (Fig. 6
and 6) mounted in a holder h, is then put in chuck a¹, the back templet plate ?
is applied to plate f and the before described drilling operation repeated in each
templet hole n³, whereby the upper portion of the mounting is shaped together
with the cavity shown in Fig. 8 and the mounting is cut out of the plate m, so
that it will drop from the templet frame when the latter is removed from plate f.
If no cavity is required in the upper part of the mounting the rounded cutting
edge 4 is omitted and a flat edge like 5 takes its place.
The drilling apparatus is operated by means of belt or cord 7 (Fig. 2,) which
may be adapted to be transferred from fixed pulley b to loose pulley c by any
suitable shifting device, and transmits the motive power from any convenient
source.
Variously sectioned mountings of different diameter can be cut by the herein-
before described device by providing differently shaped cutters or chasing tools
and, when required, different templet frames.
The mountings are subsequently gold plated, silver plated, or nickel plated,
as the case may be, and are then ready for use.
Fig. 9 illustrates the manner of securing the jewel S in the mounting and
affixing the latter to the frame plate p of the time piece.
The jewel S being laid into the hollow bed of the mounting the annular flange q¹
is bent over it and smoothed by means of any convenient tool.
The mounting is then inserted into the aperture provided for its reception in
the frame plate p of the timepiece, and fixed in position by bending and smooth-
ing down the annular flange over plate p in the manner described. The mount-
ing is now firmly secured in position and can without difficulty he removed when
required.

page_text: 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:
1. Detachable and replaceable mountings for jewel pivots for use in watches
and other time pieces and the like, having sharp annular flanges q and q¹ pro-
vided thereon, substantially as and for the purpose set forth and illustrated in
the accompanying drawings.
2. A drilling device in combination with guide plate attachment ef g g¹ and g³
for cutting the mountings claimed under 1, the whole arranged, constructed and
combined substantially as described and illustrated in the accompanying drawings.