Improvements in Folding Eyeglasses.
Year: 1889

page_text: Date of Application, 29th Jan., 1889
Complete Specification Left, 29th Oct., 1889-Accepted, 7th Dec., 1889
PROVISIONAL SPECIFICATION
Improvements in Folding Eyeglasses.
I REUBEN ARCHER, of 17 Middleton Street, Clerkenwell, in the County of Middlesex,
Optician, do hereby declare the nature of my said invention to be as follows:-
The object of my invention is to effect improvements in the construction and
fitting of placquets, attached to the frames of folders, in order to render their use
easy and comfortable.
Each placquet consists of a single independent arm, pivoted to the frame of the
folder at one end only. This pivoted end is so constructed that it is acted upon by
a small coiled spring concealed in the joint, which presses the placquet outwards
with just sufficient force and pressure to sustain the folder in any convenient
position to suit the sight of the wearer.
T
$
1000
GEO. DOWNING,
Agent for Applicant.
COMPLETE SPECIFICATION.
Improvements in Folding Eyeglasses.
I REUBEN ARCHER, of 17 Middleton Street, Clerkenwell, in the County of Middlesex,
Optician, do hereby declare the nature of my said invention and in what mannor
the same is to be performed, to be particularly described and ascertained in and by
the following statement:-
The object of my invention is to effect improvements in folding eyeglasses, in
order to render their use casy and comfortable.
In carrying out my invention I construct each of the placquets of a single
independent arm, pivotted to the frame of the folder at one end only. This pivotted
end is so constructed that it is acted upon by a small coiled or other suitable
spring, concealed in the joint, which presses the placquet outwards with just sufficient
force and pressure to sustain the folder in any convenient position to suit the sight
of the wearer. I also attach the bridge to the frame by means of dovetailed sorkets,
so as to prevent the strain of the bridge being sustained by the screw.
And in order that my said invention may be particularly described and ascertained,
reference is hereby made to the accompanying drawings, in which similar letters of
reference indicate corresponding parts.
Fig. 1 is an elevation showing the application of my invention to folding
cyeglasses.
Fig. 2 is an enlarged sectional view of the pivot and spring fitted at the end of
the placquet.
Fig. 3 is a section on the line 1-2 of Fig. 2.
Fig. 4 is a section on the line 3-4 of Fig. 1.
a a are the frames of the glasses, united together by the spring bridge s.
are the placquets, which are fitted with cork, rubber, or other linings 6, c.
dd are cheeks attached to the frame a, between which a coiled spring is fitted, and
by which the placquets are hinged to the frames of the glasses.
The construction of the spring pivots will be understood on reference to Figs. 2
and 3, in which a is a portion of the frame: is the lower portion of the placquet;
is a small case fitted to the placquet and enclosing the spring f, e is a pin passing
through the spring pivot and rivetted to the cheeks d d. g is a tail piece, against
which the end of the placquet rests. when fully extended, as shown in Fig 1

page_text: mm are dovetail sockets, fixed to the frames a a. The two ends of the bridges are
held in these sockets, as shown in section in Fig. 4; in which is a screw passing
through a hole in the bridge s, the socket m. and the frame a.
glass. It will thus be seen that the socket m bears the whole of the strain; the
o is a portion of the
screw merely preventing the bridge from sliding out of the socket.
The springs operating the placquets, as hereinbefore described, may be formed as
shown in Figs. 2 and 3 or of any other convenient form and construction for
imparting the necessary pressure.
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. The method of fitting placquets to the frames of folding eyeglasses, by means
of spring hinges, substantially as and for the purposes herein before described and
illustrated by the drawings.
Dated 29th October, 1889.
GEO. DOWNING,
8, Quality Court, London, Agent for the Applicant.