Improvements in Lighting and Extinguishing Electric Lamps for Street Lighting.
Year: 1893

page_text: Date of Application, 24th May, 1893
Complete Specification Left, 26th Feb., 1894-Accepted, 7th Apr., 1894
PROVISIONAL DIBUIT.
Improvements in Lighting and Extinguishing Electric Lamps
for Street Lighting.
I, JOSEPH LOBLEY, Engineer and Surveyor, of the Town Hall, Hanley, in the
County of Stafford, do hereby declare the nature of this invention to be as
follows:
:-
This invention for improvements in lighting and extinguishing electric lamps for
street lighting relates to street lighting in which the main streets are lighted by
arc lamps arranged in an independent circuit supplied with current only when the
lamps are lighted, or in the ordinary working circuit, and in which the side streets
are lighted by incandescent lamps in the ordinary working circuit that also supplies
private consumers and is consequently constantly supplied with current; and has
for its object to automatically light the said lamps at the desired times; and
consists essentially in arranging a series of automatic electric switches in the said
independent are lamp circuit or in a special circuit in such manner that when the
current is turned on to the arc lamps or to the special circuit the circuits of the
incandescent lamps or of both sets of lamps are also closed and are opened when
the circuit is turned off from the arc lamps or special circuit.
In one arrangement of apparatus according to this invention the arc lamp cable
is passed through the automatic switch apparatus in series with the arc lamps and
whenever the arc lamp current is on the apparatus switches on the current from
the general supply low pressure, mains to the incandescent lamps arranged in
parallel.
These lamps should not exceed 20-16 c.p. lamps off one connection so that the
distance of the most distant lamp should not exceed 200 yards. When the arc
lights are turned out the apparatus automatically switches off the current supplying
the incandescent lamps so that these lamps are automatically lighted and
extinguished by the turning on and off of the arc light circuits.
The switch apparatus consists of a solenoid or electro magnet operating a lever
attached to a switch. The current of the arc lamp circuit energizes the solenoid
or electro magnet, lifts the lever and by a mercurial dip completes a low pressure
circuit for the incandescent lamps.
Where arc lamps for street lighting are supplied with current either continuous
or alternating from the general supply mains a special wire is laid from the central
station and connected in series with the apparatus which are placed at suitable
sub stations. This special wire forms part of a circuit of a smaller power
continuous current sufficient only to energize the solenoids or electro magnets in
series in the apparatus sub stations.
The incandescent lamps may be supplied by continuous or alternating currents
and may also be arranged in series across the high pressure mains.
Dated this 24th dor of Mer 1893
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.

page_text: Improvements in Lighting and Extinguishing Electric Lamps
for Street Lighting.
I, JOSEPH LOBLEY, Engineer and Surveyor, of the Town Hall, Hanley, in the
County of Stafford, 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 :-
This invention for improvements in lighting and extinguishing electric lamps for
street lighting relates to street lighting in which the main streets are lighted by
arc lamps arranged either in an independent circuit supplied with current
only when the lamps are lighted, or in the ordinary working circuit; and in which
the side streets are lighted by incandescent lamps in the ordinary working circuit
that also supplies private consumers and is consequently constantly supplied with
current; and has for its object to automatically light the said lamps at the desired
times; and consists essentially in arranging a series of automatic electric
switches either in the said independent arc lamp circuit, or if the arc lamps are
arranged in the ordinary working circuit, in a special circuit in such manner that
when the current is turned on to the arc lamps or to the special circuit, the circuits
of the incandescent lamps or of both sets of lamps are also closed and are opened
when the circuit is turned off from the are lamps or special circuit.
In one arrangement of apparatus according to this invention the arc lamp cable
is passed through the automatic switch apparatus in series with the arc lamps and
whenever the arc lamp current is on the apparatus switches on the current from
the general supply low pressure mains to the incandescent lamps arranged in
parallel.
These lamps should not exceed twenty 16 c.p. lamps off one connection so that
the distance of the most distant lamp should not exceed 200 yards. When the arc
lights are turned out the apparatus automatically switches off the current supplying
the incandescent lamps so that these lamps are automatically lighted and
extinguished by the turning on and off of the arc light circuits.
The switch apparatus consists of a solenoid or electro magnet operating a lever
attached to a switch. The current of the arc lamp circuit energizes the solenoid
or electro magnet, lifts the lever and by a metallic contact or mercurial dip
completes a low pressure circuit for the incandescent lamps.
When are lamps for street lighting are supplied with current either continuous
or alternating from the general supply mains a special wire is laid from the central
station and connected in series with the apparatus which are placed at suitable
sub stations. This special wire forms part of a circuit of a smaller-power
continuous-current sufficient only to energize the solenoids or electro magnets in
series in the apparatus substations.
The incandescent lamps may be supplied by continuous or alternating currents
and may also be arranged in series across the high pressure mains.
In the accompanying sheet of illustrative drawings:-Fig. 1 is a front elevation
of an automatic switch box constructed according to this invention the front cover
being supposed removed and Fig. 2 is a sectional side elevation of the same.
The lever a is pivoted at to the magnet c and carries at its free end the contact
strip d adapted to make and break contact with the copper strips e.
The magnet c
is connected to the mains of the arc lamp or special circuit. The copper strips e
are connected to the terminals g of the incandescent circuit. When the magnet e s
energized the lever rises and the strips & connect the two strips e and complete the
incandescent circuit.

page_text: 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. In electric lighting installations in which the lighting is effected partly by arc
lamps and partly by incandescent lamps, arranging a series of automatic electric
switches in a circuit in such manner that when the current is turned on to the
circuit the switches are automatically operated to close lighting circuits and
return to their normal positions when the said current ceases, substantially as
described.
2. In electric lighting installations in which the lighting is effected partly by
arc lamps in a special circuit and partly by incandescent lamps in a constantly
supplied circuit, arranging a series of electric switches in the said special circuit in
such manner that when the current is turned on to the said special circuit the
switches are automatically operated to close the circuits to the incandescent lamps
and return to their normal positions when the said current ceases substantially
as described.
3. In electric lighting installations in which the lighting is effected by arc lamps
and incandescent lamps arranged in a constantly supplied circuit, arranging a series
of electric switches in a special circuit in such manner that when a current is
turned on to the special circuit the switches are automatically operated to close the
lamp circuits and return to their normal positions when the said current ceases,
substantially as described.
4. The arrangement of an automatic switch substantially as described with
reference to the drawings and for the purposes set forth.
..
T
1004
JOSEPH LOBLEY.
Wheatley & Mackenzie,
40, Chancery Lane, London, W.C., Agents.