Improvements in Spectacles or similar Optical Devices.
Year: 1898

page_text: Date of Application, 6th Apr., 1898
Complete Specification Left, 23rd Dec., 1898-Accepted, 28th Jan., 1899
PROVISIONAL SPECIFICATION.
Improvements in Spectacles or similar Optical Devices.
I, FORBES EDWARD WINSLOW, of St. Paul's Rectory, St. Leonards, in the
County of Sussex, Clerk in Holy Orders, do hereby declare the nature of this
invention to be as follows:-
This invention relates to spectacles or other similar optical devices and has for
its object the arrangement and construction of a system of lenses with their
supports in a portable and simple form, by which a far wider and more extended
field can be obtained than with opera glasses, the necessity of holding up by the
hand is wholly or partially obviated as the device can be wholly supported on
the head or be adapted with an handle as lorgnettes, and means are provided for
the use by persons of odd sight, or having any kind of defective vision or in
cases where ordinary opera glasses are utterly useless.
To carry my invention into effect I arrange a combination or pair of lenses
of definite formulæ fitted into a frame of the usual pattern of fold up spectacles
supported from the ears, and in front of these lenses I arrange a second combina-
tion or pair of lenses which are supported in a frame which is adapted to advance
and recede from the first combination or pair of lenses so as to alter the focus of
the combination, and at the same time fold down into a compact form for inser-
tion in a case for ready portability and compact stowage in pocket or otherwise._
A simple method of mounting the two frames adjustably to one another is by
connecting them by arms which are pivotted to the frames and are adapted to
fold upon or over one another, so that the frames can be pushed down close to or
pulled apart from one another.
If desirable the frames can be arranged when in their collapsed form to fold
upon or within a handle as is usual in lorgnettes.
Dated this 6th day of April 1898.
FELL & JAMES,
1, Queen Victoria Street, London, E.C.
COMPLETE SPECIFICATION.
Improvements in Spectacles or similar Optical Devices.
I FORBES EDWARD. WINSLOW, of St. Paul's Rectory, St. Leonards, in the.
County of Sussex, Clerk in Holy Orders, 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 relates to spectacles or other similar optical devices and has for

page_text: its object the arrangement and construction of a system of lenses with their
supports in a portable and simple form, by which a far wider and more extended
field can be obtained than with opera glasses, the necessity of holding up by the
hand is wholly or partially obviated as the device can be wholly supported on
the head or be adapted with a handle as lorgnettes, and means are provided for
the use by persons of odd sight, or having any kind of defective vision or in
cases where ordinary opera glasses are utterly useless.
In order that my invention may be the better understood I will now proceed
to describe the same with reference to the accompanying drawings reference
being had to the letters and figures marked thereon. Like letters refer to like
parts in the various figures.
To carry my invention into' effect I mount the two lenses A A, Figs. 1, 2 and 3
in the frame B and thereto I pivottally attach at a a the two arms C C which
enable the device to be worn in the same manner as ordinary: spectacles. On the
said arms C C I slidingly mount the arms D D which are pivotally attached
at 6 b.on the further side of the lenses A A to the frame E carrying the lenses F F
which together with the lenses A. A form the optical system. The arms DD are
slidingly attached to the arms C C by means of sleeves G G which are rigidly
attached to the arms C C and serve as guides to the arms 1 D, and also by
the sleeves H H attached to the ends of the armis D D. By these means the focal
length of the system of. lenses can be varied by altering the distance between the
two frames Band E.
a a
When the frame E is moved up into contact with the frame B, the pivots
on the frame B are in a straight line with the pivota bb on the frame thus
enabling the arms C C and D D to turn about their pivots and to lie flat on
the frame B as shown in Fig. 3, in a compact form ready for insertion in a
case or pocket. In Fig. 4, I show a modified form of this device in which I
attach the frame E to the frame B by means of the links c c at both sides of the
frames, said links being pivoted together at one end and to their respective
frames at the other. By this means the frames can be made to close up one
against the other or to open out to vary the focal length."
In Figs. 5, 6 and 7 I show another device illustrating another method of
carrying my invention into effect.
7°
This device consists of two flat handles or arms K K of tortoise-shell or other
material pivoted to one another at L. Near one end of the inner surface of
each handle I pivotally attach a small metal block M on which I pivotally
mount a frame N carrying two lenses the ends of the one frame being
attached to those of the other by means of extensible lattice-work P, the lattice-
work at each end of the frames being attached at each of its ends by two
members of which the one is pivotally attached at 7 Fig. 6, to a projection
from the frame while the other is slidingly attached to the projection by means
of a pin s adapted to slide in the slot in the said projection r. This arrangement
maintains the parallelism of the lenses in the two frames however far the two
frames may be made to move apart as hereinafter more particularly described.
When folded down the two frames N N lie between the handles K K Fig. 7
and are kept in this position by means of the pins R R of the spring pressed
catches S S which engages in the holes T T in the blocks M M when in the
closed up position.
In order to open out the frames ready for use the arms U U of the spring-
pressed catches S S are depressed by the fingers and thus the pins R R are
disengaged from the holes T T in the blocks M M, the catches are then released
while the blocks can be made to turn about their pivot bringing the frames N N
into their open position at right angles to the handles.
By this motion another hole V in each of the blocks M is brought opposite
one of the pins R which immediately engages with it under the pressure of i
one of the springs W W locking the frames in the open position.
In order to alter the focal length of the system of lenses to bring the object

page_text: under view into focus, it is merely necessary to open out the ends of the handles
carrying the frames and to cause the handles to turn about their pivot L by
applying pressure between the thumbs and finger to the other end of the handles
against the pressure of the spring Y which tends to keep the handles closed.
When the ends of the handles carrying the frames recede the one from the
other the lattice work P opens out at each end of the frames N N and at the
same time the said lattice work maintains the parallelism of the lenses which
position they are able to maintain through their frames being pivotally and
not rigidly attached at Z Z to the blocks M M.
It will be seen from these two devices illustrating my invention that the
individual lenses composing the optical system are much more accessible for
removal for the substitution of lenses adapted to the requirements of persons
possessing odd or defective eyesight than is the case with ordinary opera glasses.
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:
1st. An optical device consisting of a system of lenses fitted in a frame adapted
to be supported upon the nose and from the ears by means of arms, in combination
with a second system of lenses fitted in a frame adapted to advance or recede
from the first system or pair of lenses by means of arms slidingly attached to the
former arms, substantially as described.
2nd. An optical device consisting of a system of lenses fitted in a frame adapted
to be supported on the face in combination with a second system of lenses fitted
in a frame connected with the former frame by a system of pivoted links adapted
to enable the frames to approach and recede from one another, substantially as
described.
3rd. An optical device consisting of a system of lenses fitted in a frame pivotally
carried by a handle hinged to another handle carrying another system of lenses
fitted in a frame in combination with means for maintaining the parallelism of
said lenses during the approach and recession of the frames on closing or opening
said handles, substantially as described.
4th. An optical device consisting of a system of lenses fitted in a frame pivot-
ally carried by a handle hinged to another handle pivotally carrying another
system lenses fitted in a frame, said two frames being connected at their ends
by extensible lattice-work, at each end of which one member of the lattice work
is pivotally attached and another member is slidingly attached to the frame,
substantially as described.
5th. The arrangement and construction of optical devices substantially as
described and illustrated in and by the accompanying drawings.
Dated this 23rd day of December 1808
FELL & JAMES,
Agents for the Applicant.
1, Queen Victoria Street, London, E.C.
FELL & JAMES,
Agents for the Applicant.
1, Queen Victoria Street, London, E.C.