IMPROVEMENTS IN ELECTRIC ARC LAMPS
Year: 1886

page_text: We THOMAS STANLEY Hyde, Cheshire, Engineer; ALFRED HENRY DAVIES,
3 Mountjoy Place, Newport, Mon, Engineer and CHARLES RICHARDSON Church St.
Hyde Cheshire Electrician do hereby declare the nature of our said invention for
IMPROVEMENTS IN ELECTRIC ARC LAMPS to be as follows :-
Our invention consists solely in a method for allowing the rod or rack which
feeds an electric lamp, to descend by gravity, or if desirable, to be pushed up or
down by mechanical means, in a gradual and steady manner, without the use of a
train of wheels or reducing gear.
९
We accomplish this by means of a wheel of increased diameter, say between
three or seven inches, this wheel having beside it and attached to its spindle, a
pinion of small diameter, engaging with the rack; or the spindle might have a
cord or chain wound round it, one end being attached to the rod or rack, the
other end being fast to the spindle itself; this being but a matter of arrangement.
The wheel of large diameter, has, cut all round its circumference, what are
known as escapement teeth, which engage with some form of escapement placed at
any point round the circumference of said large wheel, and imparts, much in the
same way as in an ordinary clock, a to and fro motion to a balance wheel, or
pendulum, thus retarding the rotary motion of said wheel and in consequence
allowing the rod or rack to move only slowly and regularly.
In applying our invention to an electric lamp, we simply place the rim of the
balance wheel beneath an armature, which has a high resistance shunt coil placed
above it; this armature is made to press on the rim of the balance wheel, by
means of a spring, thereby preventing any movement whatever untill the said coils
by the electrical action of the lamp are sufficiently powerfull to overcome the spring
and release the escapement.
We do not claim the increased diameter wheel or any form of escapement by
themselves, but what we do claim is :-
The combination of a wheel of increased diameter, say between three and seven
inches, with an escapement action to retard rotary motion of said wheel, and this
only as applied to electric lamps.
D
1001 1
P T
1000
THOMAS STANLEY.
ALFRED HENRY DAVIES.
CHARLES
RICHARDSON.

page_text: We, THOMAS STANLEY, Hyde, Cheshire; Engineer; ALFRED HENRY DAVIES,
3 Mountjoy Place, Newport Mon, Engineer; and CHARLES RICHARDSON, Church St.
Hyde, Cheshire, Electrician, do hereby declare the nature of our invention for
"IMPROVEMENTS IN ELECTRIC ARC LAMPS," and in what manner the same is to
be performed, to be particularly described and ascertained in and by the following
statement:
Our invention consists solely in a method for allowing the rod or rack which
feeds an Arc Electric Lamp, to descend by gravity, or if desirable, to be pushed up
or down by mechanical means, in a gradual and steady manner, without the use
of a train of wheels or reducing gear.
We accomplish this, by means of a wheel of increased size, say, between three
and seven inches diameter; this wheel having beside it, and attached to its spindle,
a pinion of small diameter, engaging with the rack; or the spindle might have a
cord or chain, wound around it, one end being attached to the rod or rack, the
other end being fast to the spindle itself, this being but a matter of arrangement.
The wheel of large diameter, has cut all round its circumference, what are known
as escapement teeth, which engage with some form of escapement, placed at any
point round the circumference of said large wheel, imparting much in the same
way as in an ordinary clock, a to and fro motion to a balance wheel or pendulum;
thus retarding the rotary motion of said wheel, and in consequence, allowing the
rod or rack, to move only slowly and regularly.
We will now shew, by means of the accompanying drawing, how we apply our
invention to an Arc Electric Lamp.
Fig. 1 shews a front, and Fig. 2, a side view of our invention as applied to an
ordinary clockwork lamp; A is the wheel of increased diameter, B the pinion
attached to its spindle, and engaging with the rack C; D is the escapement pallet,
and E the balance wheel, above which is placed the brake lever H, pressed against
the rim of the balance wheel by the spring H¹³, and controlled by the pair of shunt
coils F. F, placed above the brake H;
The pressure of this brake lever on the rim of the balance wheel, is relieved,
when the electrical action of the lamp is such as to make the shunt coils F. F.
overcome the tension of the spring H¹;
t
The thick wire magnets I. I., lift the pivoted framework K, starting the lamp,
and bringing the balance wheel to its normal working position, under the brake
lever H, and beneath the shunt coils F. F;
The ratchet and catch L, permits the raising of the rack rod, without moving
the large escapement wheel A; These, with a few minor details, form the whole
working parts of an arc electric lamp, when our invention is used.

page_text: Having now particularly described and ascertained the nature of our said
Invention, and in what manner the same is to be performed, we declare that what
we claim is-
The combination of a wheel of increased size, say between three and seven
inches diameter, with some form of escapement (preferably the one shewn in our
drawing) at its circumference, with a balance wheel or pendulum, to retard and
regulate the rotary motion of the said large wheel.