Year: 1887

page_text: 2
Date of Application, 1st Dec., 1887
Complete Specification Left, 3rd Sept., 1888
Complete Specification Accepted, 19th Oct., 1888
I, ARTHUR EISEN, of No. 5, Mylne Street, Pentonville, in the County of Middlesex,
Watchmaker, do hereby declare the nature of this invention to be as follows:-
-
My invention relates to improvements in solitaires and studs, according to which
the head of the solitaire or stud can be detached from the stem for the purpose of
inserting or removing the latter, and re-engaged therewith.
The engagement of the head with the stem is effected by means of a collar on said
stem, and a narrow slot in the head, in which the stem slides, so that the two-stem
and head-cannot be separated by pulling.
Moreover, the back-plate need not, according to my invention, be passed through
the fabric, eg., a cuff; so that the holes therein will be saved from the wear and tear
to which they are subjected by the repeated insertion and withdrawal of the ordinary
back-plates.
In carrying my invention into effect, 1 make the stem tubular, and with a collar
on its outer end. A slot as wide as the diameter of the stem is cut in the back of
the head, and terminates in a hole large enough to allow the collar on the stem to
pass through. On the opposite side of the back is a slide, from which projects
a pin adapted to receive the tubular stem through the said hole at the end of the
slot.
When the pin is coincident with the hole, the head and stem can be engaged or
disengaged, the slide being held in its then position by spring-detents engaging
therewith.
When the solitaire-back is caused to embrace the stem-collar for the purpose of
fixing the solitaire, the said detents are released, and the head is pushed or pulled
past the stem. A second engagement between the detents and the slide takes place
at the end of the last mentioned motion, and the solitaire will be fixed.
The detents above mentioned may be of any convenient kind. I find that bars
sliding at right angles with the first mentioned bar, and pressed inwards by U-shaped
springs, are preferable.

page_text: They may be released by a stud or studs projecting from the solitaire head. Two
studs are better than one, inasmuch as two are less likely than one to he actuated
accidentally. I do not confine myself to the number of detents.
This invention is equally applicable to stands.
PHILLIPS & LEIGH,
Agents for the Applicant.
1, ARTHUR EISEN, of No. 5, Mylne Street, Pentonville, in the County of Middlesex,
Watchmaker, 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:-
My invention relates to improvements in solitaires and studs the heads of which
are adapted to be detached from the stems and re-engaged therewith without passing
the back-plates through the fabric.
In order that my invention, and the means by which the same can be carried into
practical effect, may be thoroughly understood. I will now describe the same in detail,
referring in so doing to the accompanying drawings which are to be taken as part of
this specification and read therewith.
The drawings illustrate the application of my invention to a solitaire, but I wish
it to be distinctly understood that it is equally applicable, and in the same way, to a
stud.
Fig. 1 is a front view of a solitaire shewing the internal mechanism locked, but
omitting the back-plate.
Fig. 2 is a front view of a solitaire shewing the internal mechanism unlocked!
Fig. 3 is a back view of a solitaire-head shewing the slide in the locked position.
Fig. 4 is a perspective view of the slide and pin.
Fig. 5 is an elevation of the back-plate and stem.
Fig. 6 is a perspective view of the releasing stud.
A is the solitaire-head; a, its back; b, the slot cut therein; and terminating in. a
hole c.
Dis the back-plate; d, the hollow stem fast thereto; and e, the collar upon the
outer end of the stem. The diameter of the collar, e, is rather less than that of
the hole, c; and that of the stem, where it joins the collar, rather less than the width
of the slot, b.

page_text: F is a slide; and f, a pin projecting therefrom past the solitaire-back, a, and
adapted, in point of diameter and length, to be embraced by the hollow stem, d.
G, Gare two detents kept in contact with the slide, F, by springs h, h, which
latter cause them to engage with the slide behind the corners, i, for the purpose of
locking the back-plate to the head.
J is a stud projecting beyond the head and engaging with the detents G, G, by
means of a fork, j. I do not confine myself to a single stud, inasmuch as two may
be used, each engaging with one detent independently of the other.
Suitable guides and recesses for the slide, F; the fork, j; the detents G, G ; and
the springs h, h, respectively, are furnished by a plate, k, secured in any convenient
way to the head, A.
The slide, F, may have notches formed in it, if preferred, for the detents to engage
in; and it may also be made so that the detents can engage with it when it is in
the unlocked position.
A solitaire or stud made according to my invention is used as follows.
The stem, d, having been passed through the fabric from behind, the slide, F, is
released and drawn back until the end, f, touches the plate, k; when the pin ƒ will
be concentric with the hole, c.
The pin is then pushed into the bore of the stem, d; the slide, F, released from the
detents, G, if it is made to be engaged by them when it is in the unlocked position,
and the head, A, pushed past the pin, f. When the end of the slot, b, furthest from
the hole, c, reaches the stem the detents engage with the slide, F, behind the
corners, i; and the solitaire is locked. This engagement of the detents, G, with the
slide, F, causes the stud, J, to project beyond the head, A.
To remove the solitaire from the fabric, the detents, G, are disengaged from the
slide, F, by pressing the stud, J, in; the head pushed past the pin, /, until the hole, c,
is concentric with the collar, e; when it is disengaged from the stem, d, by with-
drawing the pin therefrom.
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 :-
:-
The combination of slide and pin, releasable detents, hollow stem and back-plate,
slot and hole, and projecting stud or studs, as set forth.
Dated this 3rd day of September 1888.
PHILLIPS & LEIGH,
Patent Agents,
22, Southampton Buildings, Chancery Lane, W.C.,
Agents for the Applicant.