Improvements in or connected with Lamps or Lanterns.
Year: 1897

page_text: PROVISIONAL SPECIFICATION.
Improvements in or connected with Lamps or Lanterns.
JOHN LEGG, 17 & 18, Nelson Street, Swansea, Lighting, Heating & Ventilating
Engineer, do hereby declare the nature of this invention to be as follows:-
A spiral spring preferably of steel of sufficient size to slip over the
cup-and-ball joint supporting an outside shop or other lamp or lantern, the said
spiral spring being held in position by clamps above & below the cup & ball joint
the 2 halves of clamps being secured by small bolts & nuts the object being
twofold.
First If the lamp or lantern be an advertising one the above invention will
keep the advt. facing whatever position is desired & keep the light thrown on the
window. That it would admit of free play in the cup & ball joint, but of sufficient
strength to keep the lamp or lantern from revolving out of its position at the same time
the resistance offered is not sufficient to cause damage to the burners in the lamp
or lantern should they be incandescent or of a fragile nature.
Second, Should the cup & ball joint break (as they often do) the lamp or lantern
would not fall but would be suspended by the spiral spring until a new joint had
been put in thus preventing what might be a serious accident t. persons passing
under the lamp or lantern at the time.
1007
JOHN LEGG,
17 & 18, Nelson Street, Swansea.
Improvements in or connected with Lamps or Lanterns.
JOHN LEGG, Gas Engineer, 17 & 18, Nelson Street, Swansea I 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 consists of improvements in or connected with lamps or lanterns
being especially intended for use with heavy hanging lamps such as are often
used upon the outside of buildings.
On the accompanying sheet of drawings is illustrated a manner of carrying
out my invention, Figure 1 being a vertical section and Figure 2 an elevation of
my invention applied to a suspension pipe having an ordinary cup and ball joint.
Referring to said drawings, A represents a spiral spring, preferably made of
phosphor-bronze or tempered steel wire, and of sufficient size to pass freely over

page_text: an ordinary cup and ball joint B. The ends a a of the spring A are attached to
the suspension pipes DD by two clamps CC, above and below said joint B
respectively, each end of the spring being hooked or bent so as to surround the
securing bolt E, as shown at the top of Figure 1, or other suitable means of secur-
ing the ends aa of the spring may be employed. The spring A should be
sufficiently yielding to allow of free play in the cup and ball joint, but strong
enough to prevent the lamp revolving, when desired.
By my invention, the lamp or lantern, instead of falling if the joint should
chance to break, will be supported by the spiral spring until a new joint has been
put in, thus preventing what might otherwise be a serious accident to persons
passing under the lamp or lantern at the time. If the lamp or lantern be an
advertising one, the spring will keep the advertisement constantly in the desired
position, and it will keep the rays of the lamp directed to any particular spot
for any purpose whatever. Further advantages of the spring are that it controls
the twisting of a lamp or lantern preventing it from becoming accidentally un-
screwed, such as in a strong wind, and yet admits of free play in the cup and
ball joint.
My invention will be found useful where incandescent, or burners of a fragile
nature are employed, as the resistance offered to a gale of wind or other disturbing
agent will not be so great as to cause damage to same.
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:
In a lamp or lantern the application to the suspension pipes DD of a spring
such as A substantially as and for the purposes described in the foregoing
specification.
ne 1898.
For the Applicant,
STANLEY, POPPLEWELL & Co.,
61 & 62, Chancery Lane,
(7 & 8, Southampton Buildings), London, W.C.,
Chartered Patent Agents.