Improvements in or relating to Clamping Devices for Cycle and similar Lamps.
Year: 1897

page_text: Date of Application, 25th Sept., 1897-Accepted, 30th Oct., 1897
COMPLETE SPECIFICATION.
Improvements in or relating to Clamping Devices for Cycle and
similar Lamps.
HERMANN RIEMANN, of Chemnitz, Gablenz, in the Empire of Germany, Manu-
facturer, 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:-
The want of uniformity in the width and thickness of cycle and similar lamp
brackets is extremely unsatisfactory both to dealers and to the public as a lamp
may often fit only one cycle and not another so that the dealer has to order lamps
with different sized sockets to fit different makes of cycles he is selling whereby
he is obliged to keep a larger number in stock than he otherwise would do.
Another drawback of the sockets used hitherto for attaching lamps is that their
size is not adjustable. The sockets are usually secured to the lamp brackets by
adjusting a screw arranged at the back, front or side of the socket the lamp having
after an insufficient hold on the bracket and in many cases for instance in case of
very weak or round lamp brackets is not secured firmly at all. Besides lateral
screws have the disadvantage of necessitating their being screwed very far out in
case of wide brackets filling up the sockets while it is impossible to use screws
arranged at the back of the socket on account of the brake rod unless the bracket
projects very much and it would be very inconvenient to arrange the screw in
front on account of the difficulty of manipulating it.
The device according to the present invention illustrated in the accompanying
drawing obviates all the above drawbacks Fig. 1 is a rear view of the device the
lamp being partially indicated in dotted lines, Fig. 2 is a vertical and Fig. 3 a
transverse section and Fig. 4 a similar view of a modification.
As may be seen from the drawing the lamp is secured to the lamp bracket not
directly by a clamping screw as heretofore but by clamping jaws 1 and 2 which are
movable relatively to each other. They are mounted on the back 3 of the handle 4
of the lamp so as to be adjustable in a transverse direction. The hook-shaped
ends 5 and 6 of the jaws 1 and 2 serve as guides for the latter on the back of the
handle. A screw 7 rotatably mounted in the jaw 1 passes through a screw-
threaded part of the jaw 2 and when turned causes the latter to approach or movo
away from the jaw 1. The free ends 8 and 9 of the jaws also hooked or bent to a
suitable shape are adapted to embrace the lamp brackets not shown in the drawing
so that owing to the relative adjustability of the jaws a bracket of anty width or
thickness may be securely engaged under any circumstances. The jaws may be
of various shapes and the gripping surfaces may be ribbed or roughened if desired.
Fig. 4 shows a modification of the device according to the present invention
enabling both jaws to be moved simultaneously. This is effected by means of a
screw 10 provided with a right and left hand thread said screw being rotatably
supported at its centre at 11 on the lamp handle 3 both jaws being in this case
provided with screw thread.
Owing to the bent shape of the ends of the jaws 1 & 2 a recess 12 is formed in

page_text: which the head of the screw can enter, so that it projects not at all, or very little
even in the case of the widest lamp-brackets.
The device hereinbefore described fulfils all requirements and may be used on
cycle and similar lamps of any construction.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed I declare that what I
claim is:
1. A clamping device for securing cycle and similar lamps to brackets charac-
terised by the arrangement of clamping jaws of any desired shape adjustably
mounted with their front bent edges engaging the back of the lamp-handle 4 or
any other suitable part of the lamp and capable of being moved nearer to or further
apart from each other by means of a screw as 7 or by a screw as 10 provided with
left and right handed threads substantially as described.
2. The combination and arrangement of parts constituting the complete
clamping device for cycle and similar lamps substantially as described and
illustrated in Figures 1, 2 and 3 or in Figure 4 of the accompanying drawings.
Dated this 22nd day of September 1897.
BOULT & WADE,
Agents for the Applicant.