Improvements in Pavement Lights, Glazed Gratings, and the like.
Year: 1890

page_text: Date of Application (in United Kingdom), 10th June, 1890
Complete Specification Left, 10th June, 1890-Accepted, 16th Aug., 1890
COMPLETE SPECIFICATION.
Improvements in Pavement Lights, Glazed Gratings, and the like.
I, JACOB JACOBS, a citizen of the United States of America, residing at 510 Pearl
Street, in the City, County and State of New York, one of the United States of
America, Manufacturer, 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:-
Figures 1 and 2 are perspective views, respectively, of the upper and lower sides
of my lens as preferably constructed.
Figure 3, is a like view from the lower side of said lens when provided with a
modified form.
Figure 4, is a perspective view from the upper side of the lens when in position
within the supporting-frame, and
Figures 5 and 6, are respectively sections upon lines -, and 2-z, of Figure 4.
Letters of like name and kind refer to like parts in each of the figures.
The object of my invention is to lessen the number of joints in an illuminating-tilo
and to reduce its cost without rendering it less efficient for the transmission of light,
to which end such invention consists, principally, in the construction of the lenses and
their combination with the supporting-frame, substantially as and for the purpose
hereinafter specified.
It consists, further, in the construction and combination of the lens and encaustic
tiles, substantially as and for the purpose hereinafter_shown.
In the carrying of my invention into practice I employ a lens, A, which has a
square form in plan view, and upon its upper face is provided with cylindrical
bosses, a, and, a, that are arranged thereon at equidistant points. At the base of
each boss is provided four radial lugs, a', and a', which are located at equidistant
points and are arranged upon lines passing through the axes of the diagonal rows
of bosses. The lower face of the lens, A, is preferably recessed, and within such
recess is provided with round conical bosses, a², and, a², which are located at
equidistant points, and half-round intersecting ribs, a³, and, a³, that are arranged in
lines which are parallel with the sides of the lens and directly beneath the spaces
between the bosses, a. If preferred, the lower face of said lens may have a downward-
swelling panel, a, between which and each of the edges of the lens is left a plain
bearing-strip, a, as shown in Figures 3, 5, and 6. The lens thus constructed is
placed within a correspondingly-shaped opening in a supporting-fraine, B, where its
bottom edges, a, and, a, rest upon supporting-ledges, b, and, in the usual manner.
When said lens is thus in place, an encaustic tile, C, is placed within each space
between contiguous bosses, where it is centered by means of the lugs, a', and, a', after
which the spaces between said bosses and encaustic tiles are filled with a suitable
cement, D. The surface thus produced is composed wholly of glass, encaustic tiles,
and cement, and presents the same appearance as though each boss, a, was a separately
formed and set lens, and while equally strong and durable for all practical purposes
it is capable of transmitting far more light than tiles of ordinary construction, as the
spaces usually occupied between lenses by a metal plate are in this case occupied by

page_text: glass, which bas the same effect as would be secured by increasing materially the area
of the lower ends of ordinary lenses.
In consequence of the combination in one body of several heretofore separate
lenses, the number and extent of the joints to be made are-materially reduced and
the cost of construction correspondingly lessened.
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. As an improvement in illuminating-tiles, a lens which is composed of a plate of
glass that has its upper side recessed to cause it to resemble a number of separately-
for med lenses, and has on its lower side strengthening-ribs that are formed integral
with said plate and are arranged beneath and in line with the recesses in its upper
side, substantially as and for the purpose specified.
2. As an improvement in illuminating-tiles, a lens which is composed of a plate of
glass that has its upper side recessed to cause it to resemble a number of separately-
formed lenses, and has on its lower side intersecting half-round ribs that are forined
integral with said plate and are arranged beneath and in line with the recesses in its
upper side, substantially as and for the purpose set forth.
3. As an improvement in illuminating-tiles, a lens which is composed of a plate of
glass that has its upper side recessed to cause it to resemble a number of separately-
formed lenses, and has on its lower side strengthening-ribs that are formed integral
with said plate and are arranged beneath and in line with the recesses in its upper
side, in combination with cement that is placed within and caused to fill such recesses,
substantially as and for the purpose shown.
4. As an improvement in illuminating-tiles, a lens which is composed of a plate of
glass that has its upper side recessed to cause it to resemble a number of separately-
formed lenses, and has on its lower side a number of strengthening-ribs, in com-
bination with encaustic tiles and cement that are placed within and caused to fill such
recess, substantially as and for the purpose set forth.
5. As an improvement in illuminating-tiles, a lens which is composed of a plate
of glass that has its upper side recessed to cause it to resemble a number of separately-
formed lenses, and has a recess in its lower side in which are formed several bosses
and intersecting ribs, in combination with encaustic tiles and cement that are placed
within and caused to fill the recesses in the upper side of said plate, substantially as
and for the purpose shown.
6. As an improvement in illuminating-tiles, a lens which is composed of a plate of
glass that has its upper side recessed to cause it to resemble a number of separately-
formed lenses, in combination with encaustic tiles and cement that are placed within
and caused to fill such recesses, substantially as and for the purpose shown.
7. As an improvement in illuminating-tiles, a lens which is composed of a plate of
glass that has its upper side recessed to receive encaustic tiles and cement, and is
provided within such recesses with lugs which are adapted to center such encaustic
tiles, substantially as and for the purpose set forth.
S. An illuminating-tile which is composed of a metal frame having square openings,
lenses that are adapted to fit within such openings and are each provided with a
recessed upper face, encaustic tiles that are placed within the recesses of each lens,
and cement which is placed within and caused to fill the spaces between the sides
of such recesses and said encaustic tiles, substantially as and for the purpose shown
and described.
Dated this 10th dow of June 1900
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.