IMPROVEMENTS IN STREET LAMPS AND OTHER LIKE STRUCTURES, AND IN THE MODE OF SECURING THE GLASS IN THE SAME, WHICH LATTER PART OF THE INVENTION IS APPLICABLE ALSO TO SECURING GLASS IN OTHER STRUCTURES
Year: 1878

page_text: LETTERS PATENT to Robert John Worrall, of Tue Brook, in the County of
Lancaster, for the Invention of "IMPROVEMENTS IN STREET LAMPS AND
OTHER LIKE STRUCTURES, AND IN THE MODE OF SECURING THE GLASS IN
THE SAME, WHICH LATTER PART OF THE INVENTION IS APPLICABLE ALSO TO
SECURING GLASS IN OTHER STRUCTURES."
'
ealed the 27th August 1878, and dated the 4th March 1878.
PROVISIONAL SPECIFICATION left by the said Robert John Worrall at the
Office of the Commissioners of Patents on the 4th March 1878.
ROBERT JOHN WORRALL, of Tue Brook, in the County of Lancaster. "IMPROVE→
MENTS IN STREET LAMPS AND OTHER LIKE STRUCTURES, AND IN THE MODE OF
SECURING THE GLASS IN THE SAME, WHICH LATTER PART OF THE INVENTION IS
APPLICABLE ALSO TO SECURING GLASS IN OTHER STRUCTURES."
Street lamps as at present constructed have no means of securely fastening and
holding the glass in such manner that it can be removed easily, and without
removing the lamp from the bracket.
Putty has hitherto been used, but is apt to crack off when exposed to varying
temperatures, and the glass then becomes loose.
A great injury is done to the frame by the hacking away of old putty, when
reglazing.
Now, my Invention consists in the application of india-rubber for this purpose.
In carrying it out, I construct a trough-shaped piece of stiff metal, secured at each
opposite angle of the lamp, and extending the length of the pane. In this groove,
I place sheet rubber, entirely lining the groove, and inserting the pane of glass in'
the two opposite rubber-lined grooves, it is securely held.
It will be seen that the pane of glass can be removed in a very short time, and.
can be as quickly replaced.
Many ways might be adopted of securing the rubber, without departing from
the principle of the Invention. It might be cemented in the groove, but I'
prefer merely inserting it; first, so as to hold the edge of the glass on both
Ping G77

page_text: faces; and, secondly, so as to easily replace the rubber when worn. The rubber
might be placed at intervals in the groove, but I prefer that it should extend
along it.
The Invention, of course, is applicable for glazing other structures, such as door
panels, windows, shew cases, aquariums, et cetera, as grooves can be easily constructed
in the framing of these structures, to hold the rubber and glass, the details being,
of course, modified to suit the situation and article to be glazed.
It will be found that this plan of glazing will entirely prevent the jarring of the
glass when the structure is exposed to vibration, as is the case with vehicle windows
and street lamps.
The Invention will be found economical, as the time occupied in glazing is greatly
shortened.
.
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Robert John Worrall in the Great Seal Patent Office on the 4th
September 1878.
ROBERT JOHN WORRALL, of Tue Brook, in the County of Lancaster. "IMPROVE-
MENTS IN STREET LAMPS AND OTHER LIKE STRUCTURES, AND IN THE MODE of
SECURING THE GLASS IN THE SAME, WHICH LATTER PART OF THE INVENTION IS
APPLICABLE ALSO TO SECURING GLASS IN OTHER STRUCTURES."
Street lamps, as at present constructed, have seldom means of securely fastening
and holding the glass in such manner that it can be removed easily, and without
removing the lamp from the bracket.
Putty has hitherto been used, but is apt to crack off when exposed to varying
temperatures, and the glass then becomes loose; also, if the putty is hard enough to
fix the glass firmly, it cannot expand under the various degrees of heat and cold,
and consequently is easily cracked when under a strain.
A great injury is done to the frame by the hacking away of old putty, when
reglazing.
Now, my Invention consists in the application of india-rubber for this purpose.
In carrying it out, I construct a trough-shaped piece of stiff metal, secured at each
opposite angles of the lamp, and extending the length of the pane. In this groove,
I place sheet rubber, entirely lining the groove, and on inserting the pane of glass
in the two opposite rubber-lined grooves, it is securely held.
It will be seen that the pane of glass can be removed in a very short time, and
can be as quickly replaced.
Many ways might be adopted of securing the rubber, without departing from
the principle of the Invention. It might be cemented in the groove, but I find
this does not answer well in practice, and I prefer merely inserting it; first, so
as to hold the edge of the glass on both faces; and secondly, so as to easily
replace the rubber when worn, I prefer to extend the rubber all along the
groove,

page_text: The Invention, of course, is applicable for glazing other structures, such as door
panels, windows, show cases, aquaria, et cetera, as grooves can be easily constructed
in the framing of these structures to hold the rubber and glass, the details being,
of course, modified to suit the situation and article to be glazed.
It will be found that this plan of glazing will entirely prevent the jarring of
the glass when the structure is exposed to vibration, as is the case with vehicle
windows and street lamps.
The Invention will be found economical, as the time occupied in glazing is greatly
shortened.
The Invention will be found useful for glazing railway station roofs.
The Drawing hereunto annexed represents a cross section through part of a
street lamp, the framing of the lamp body not being shown, but only the arrange-
ment attached to it for holding the glass.
The stiff metal trough, at each angle of the lamp, is made by means of the piece
of metal A, bent as shown, and which extends the whole length of the pane. The
pieces B, B, soldered or attached together, so as to form a Y, are attached to A by
Bolder or otherwise.
In Fig. 1, which is a cross section of the trough, the ends of the Y pieces are
bent slightly towards the bent strip A.
In Fig. 2 they are shown parallel thereto.
Of course in the structures where only a single sheet of glass is required to be
fixed a piece of stiff metal bent into a Ŭ or V shape is or can be used at each side
of the glass, so as to contain the rubber c, instead of the arrangement above
shewn.
I do not bind myself to the exact shape of the grooves or trough, as it may be
varied to suit various purposes; also the word "glass" throughout this Specification
applies to other translucent material used for the same purpose.
Having now described my Invention, and the best mode known to me of
carrying it into effect, I beg to state that I am well aware that it has been often
proposed to use india-rubber for the purposes of glazing (but I believe not in the
way as invented by me), and I am also aware of a scheme for glazing street lamps by
inserting the glass into grooves or troughs of soft metal bent over the edges of
the glass, and I do not claim such; but what I believe to be novel and original
and claim as my Invention under the herein-before in part recited Letters
Patent is,-
1. The manufacture of street lamps and like structures with rigid metal troughs
or grooves for holding sheet rubber, surrounding the edges of the glass, substantially
as and for the purposes described.
2. The mode of securing the glass in street lamps or other glazed structures, by
inserting the edges of the pane or panes of glass into a stiff metal groove or trough
filled or lined with loose sheet rubber, so that the edges of the sheet of glass are
surrounded and held by the rubber, for the purposes described.
In witness whereof, I, the said Robert John Worrall, have hereunto set
my hand and seal, this Nineteenth day of August, in the year of our
1 1819
ROBERT J. WORRALL. (L.S.)
Witness,
E. GARDNER COLTON,
Of Messrs. W. P. Thompson & Co.'s Patent Office,
6, Lord Street,
Liverpool.