Improvements in and relating to the Attachment of Electric Lamps to their Posts.
Year: 1893

page_text: Date of Application, 11th Aug., 1893-Accepted, 23rd Sept., 1893
COMPLETE SPECIFICATION.
Improvements in and relating to the Attachment of Electric Lamps
to their Posts.
I, WILHELM OSENBERG, Engineer of 8 Concordia Strasse Hagen in the
Province of Westphalia, German Empire, do hereby declare the nature of my
invention and in what manner the same is to be performed to be particularly
described and ascertained in and by the following statement :-
The object of the present invention is to provide means for the attachment of
electric lamps to their posts and for hoisting the said lamps on the post in such
manner as to enable the lamp to be run up to the top of the said post and there
adjusted in a position vertically over the top of the post and in line with the centre
line of the same.
This object is attained by mounting the lamp on or between swinging angle
levers mounted on a pulley adapted to run in guides up and down the said post, the
said angle levers being swung over by stops arranged at the upper part of the post
when the lamp has been hoisted into its highest position, whilst on lowering the
lamp the said levers are swung back by means of other stops thus bringing the
lamp back into a position sideward of the post. Or the lamp may be mounted on
the horizontal arm of a bracket and by means of suitable mechanism swung round
over the top of the post when it has been run up into its highest position on the
same.
In order to make the present invention more easily intelligible reference is had
to the accompanying drawings in which similar letters denote similar parts
throughout the several views.
Fig. 1 is a side elevation of the lamp in position on the post,
Fig. 2 a plan with the lamp and the top of the post cut away.
Fig. 3 is a side elevation showing a modified form of the device and
Fig. 4 a sectional plan of the same.
The slide blocks is guided in suitable manner on the post p and may be hoisted
up and down on the same by means of the line running over the pulleys at the
top of the post. In the slide blocks are mounted two spindles a a each carrying
a pair of angle levers a' a' and a² a. The upper arms of these angle levers are
coupled by the lamp frame a³, whilst the lower arms are connected up by means of
a coupling rod r. The lower arms of the upper pair of angle levers a¹ a¹ are
lengthened to contact with stops b and c fixed to the post near the top of the same
in such manner that on lowering the lamp A from its position in Fig. 1 to that
shown in dotted lines, the projecting arms of the upper pair of angle levers a' a¹
will be thrown over by the stop c so as to bring the lamp into position at the side
of the post and allow the same to be let down, whilst on the other hand when
hoisting the lamp up the extending arms of the levers a' a' will contact with the
stop 6 thus throwing the levers over and bringing the lamp into position vertically
over the top of the post.
In the modification shown in Figs. 3 and 4 the lamp A is mounted on a bracket
arm d, adapted to turn in its bearings in the slide blocks by means of the following
mechanism :-To the lower end of the bracket arm d is rigidly attached a bevel
wheel A³ engaging in a tooth segment / mounted in the slide blocks and having
attached to it a lever / carrying a weight g. A stationary arm e is fitted to the
upper part of the post and when the lamp is hoisted up this arm contacts with the
end of the lever and turns the bevel Around 180 degrees, thus turning the lump
vertically over the top of the post. On lowering the lamp the weight is
sufficient to turn the same back to a position sideward of the post as soon as the
end of the lever / is relieved from the pressure of the arm e.

page_text: The device illustrated in Figs. 1 and 2 may be modified by employing one pair
of angle levers only and mounting the lamp to swing between the upper arms of
the same. Or one pair of levers may be mounted at the top and the other at the
lower part of the lamp post, the lamp may then be guided on the parallel rods
connecting up the two levers, and then thrown over the top of the said post by
hand from the lower lever.
In the device shown in Figs. 3 and 4 any equivalent mechanism may be
substituted for the bevel 3 and the segment h¹.
The movements of all parts are limited by suitable stops.
I wish it to be clearly understood that I do not confine myself strictly to the
details of construction hereinbefore described as the same may be modified in
many and various ways without however departing from the spirit of my
invention.
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. A device for hoisting electric lamps on their posts and automatically or by
hand bringing the same into position over the top of the said post in a line with
the same, by means of angle levers or bevel gearing or their equivalents arranged
intermediately between the lamp and post in the manner substantially as herein-
before described and shown.