An Improved Anti-vibrating Back for Velocipede Lamps.
Year: 1891

page_text: Date of Application, 29th July, 1891
Complete Specification Left, 27th Apr., 1892-Accepted, 25th May, 1892
PROVISIONAL SPECIFICATION..
An Improved Anti-vibrating Back for Velocipede Lamps.
HARRY LUCAS, The Tom Bowling Lamp Works, Little King Street, Bir-
mingham Lamp Manufacturer and ERNEST MARSHALL of the same address,
Mechanic, do hereby declare the nature of this invention to be as follows:-
Our invention relates to anti-vibrating spring backs for velocipede lamps and
consists essentially of an improved arrangement or combination of the parts forming
the spring arm.
We use two parallel arms or pairs of arms as usual between the lamp and its
socket part and we preferably make the spring arm the upper one of the two. The
spring is coiled or formed out of a strip of hard rolled German silver or other suit-
able metal and the outer end is attached to the socket part of the lamp. The arm
is made of two pieces of metal each piece being [-shaped and having one end round
for hinge connection with the lamp and the other end square, hexagonal or other
suitable shape for forcing into the correspondingly shaped inner coil of the spring
so that the arm and spring will work together. The two pieces of the arm are
held or tied together by a cross piece.
Dated this 27th day of July 1891
HARRY LUCAS.
ERNEST MARSHALL.
COMPLETE SPECIFICATION.
An Improved Anti-vibrating Back for Velocipede Lamps.
HARRY LUCAS, The "Tom Bowling" Lamp Works, Little King Street, Bir-
mingham, Lamp Manufacturer and ERNEST MARSHALL of the same address,
Mechanic, 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:-
Our invention relates to anti-vibrating spring backs for velocipede lamps and
consists essentially of an improved arrangement or combination of the parts forming
the spring arm.
We use two parallel arms or pairs of arms as usual between the lamp and its
socket part and we preferably make the spring arm the upper one of the two as
shown in Fig. 7 of the accompanying drawings.
The spring is coiled or formed out of a strip of hard rolled German silver or other
suitable metal as shown in Fig. 3 and the outer end is preferably attached to the
socket part either as shown at F in Figs. 4 and 7 or enclosed in a sleeve formed on
the socket part as shown in Fig. 5. By the socket part we mean the socket or
other device by which the lamp is attached to a velocipede or other vehicle.
The simplest form of the arm is made of two pieces of wire each piece being
[shaped and having one end round for hinge connection with the lamp and the
other end made square, hexagonal or other suitable shape for forcing or locking
into the correspondingly shaped inner coil of the spring so that the arm and the
spring will work together.
Fig. 1 shows the two parts of the arm formed out of wire and having two round
ends A. A. and two square ends B. B. The two sides or parts of the arm are held
or tied together by a crosspiece as shown at C in Figs. 6 and 7.
Sometimes we prefer to make the two sides of the arm with a screw pin or rivet
to connect them at one end as shown at D in Fig. 2, and in this case the sides may

page_text: be cast with the square or other suitably shaped ends B. B. on them or the sides
may be stamped out of sheet metal and have the ends B. B. soldered or rivetted to
them.
Fig. 7 shows the spring back complete, K is the socket, F the spring, G. H and J
are india-rubber lined sleeves into which the top and bottom arms hinge, and G. H.
is the part for soldering or fixing on to the lamp.
If preferred, the spring instead of being attached to the socket part may be
enclosed in one of the sleeves which are for fixing on to the lamp as shown in Fig. 8
where the spring is enclosed in the sleeve H³.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is to be performed, we declare that what we
claim is
1. The construction of the spring arm for a velocipede lamp substantially as
described and illustrated.
2. In the spring back of a velocipede lamp the combination of the socket part
and spring substantially as shown in Figs. 4 and 5, with the arm in two parts sub-
stantially as described and shown in Fig. 1.
3. In the spring back of a velocipede lamp the combination of the socket part
and spring substantially as shown in Figs. 4 and 5, with the arm substantially as
described and shown in Fig. 2.
4. In the spring back of a velocipede lamp the combination of the spring coiled
out of sheet metal with the two sides of the arm made to lock into the square or
equivalent shaped inner coil of the spring substantially as described.
Dated this 26th day of April 1892.
HARRY LUCAS.
ERNEST
MARSHALL.