Improvements in Portable Electric Lamps.
Year: 1893

page_text: Date of Application, 23th Apr., 1893
Complete Specification Left, 26th Jan., 1894-Accepted, 31st Mar., 1894
PROVISIONAL SPECIFICATION.
Improvements in Portable Electric Lamps.
I OCTAVIUS MARCH of 70 Sinclair Road Kensington Electrical Engineer do
hereby declare the nature of this invention to be as follows:—
My invention consists of a new and improved form of portable electric lamp
with battery suitable for photographic dark rooms reading lamp, bedroom light and
other similar purposes.
I construct my lamp in the following way.
I place in the lower part of an outer containing box or case the accumulatus to
be used.
In the upper part I place an incandescent lamp of proper voltage to use with
such accumulatus.
In the front of the upper part of such containing box or case and opposite to the
incandescent lamp is an opening and covering such opening is a hinged shutter or
shade constructed in such a way that when the shutter or shade is closed the
lamp circuit is broken and when the shutter or shade is opened the lamp
circuit is closed thus doing away with the necessity of using a switch for turning
on the lamp.
For photographic work I place a piece of ruby colored glass in the front
opening of the case this glass can either be fixed or removable.
Dated this 28th day of April 1893.
COMPLETE SPECIFICATION.
Improvements in Portable Electric Lamps.
I OCTAVIUS MARCH of 70 Sinclair Road Kensington Electrical Engineer 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:
My invention consists of an improved form of portable electric lamp with battery
suitable for photographic dark rooms, reading lamp, bedroom light and other
similar purposes.
I construct my lamp in the following way.
I place in the lower part of an outer containing box or case the accumulating or
other batteries to be used.
In the upper part I place an incandescent lamp of proper voltage to use with
such batteries.
In the front of the upper part of such containing box or case and opposite
to the incandescent lamp is an opening and covering such opening is a hinged
shutter or shade constructed in such a way that when the shutter or shade is
closed the lamp circuit is broken and when the shutter or shade is opened the
lamp circuit is closed thus doing away with the necessity of using a switch for
turning on the lamp.
For photographic work I provide suitable colored glasses which can be placed
in front of the opening these may be attached by means of slides or hinges or in
any other convenient manner.

page_text: The manner which I preferably adopt for carrying my invention into effect may
be more conveniently understood by reference to the annexed drawings, but I do
not confine myself to the exact details of same.
Fig. I is a front view of a portable lamp and battery A is the containing box or
case and S the shutter which is shown closed. At the point on such shutter is a
small lug which passes through a slit in the front of the box and operates the
contact springs-Figs. II and III.
Fig. II is a section through the line a-b.
Fig. III is a section through the line c-d.
In Figs. II and III the upper and lower parts of the containing box are shown
the lower part containing the cells C and the upper the lamp L.
In Fig. II the shutter S is shown open when the contact spring presses upon
the stud P closing the lamp circuit.
In Fig. III the shutter is shown closed the lug pressing upon the spring
lifting it off the stud P and breaking the lamp circuit.
The terminals of the cells are connected with the lamp through the contact
spring and stud.
Having now particularly described and ascertained the nature of my said iuven-
tion and in what manner the same is to be performed I declare that what I
-claim is
1. A portable electric lamp and battery in one outer containing box or case
having a shutter or shade so constructed that the opening of such shutter or shade
completes the lamp circuit and the closing of such shutter or shade breaks the lamp
circuit without the necessity of any separate appliance for effecting this purpose
such portable electric lamp being constructed and arranged substantially in the
mauner described.
Dated this 26th day of January 1894.
OCTAVIUS MARCH.