Year: 1885

page_text: We STANLEY CHARLES CUTHBERT CURRIE of 75 Jermyn Street Piccadilly
Gentleman and ILLIUS AUGUSTUS TIMMIS of 2 Great George St. Westminster S.W.
Civil Engineer both in the County of Middlesex do hereby declare the nature of
the said invention for AN ELECTRIC AIR PUMP, to be as follows:-
According to our said Invention we attach to the armature of an Electro-Magnet
(generally of the form specified in Stanley Charles Cuthbert Currie's Patent
No 3712. 1882) a suitable contact maker and breaker so as to break the Electric.
current running through Magnet when the armature is a given distance from the
home position and make contact again when armature has returned a given distance
from the Magnet. This return of the Armature can be effected by means of a
spring or weight or in the case of two magnets working alternately the Armatures
can be arranged to balance one another so that. when one Magnet is cut out of
circuit, the other is put in.
To the Armature or Armatures thus arranged we attach a piston rod working
an air pump (exhaust or compression). In the case of using the magnets made
according to the above mentioned patent we make.use of the centre soft iron
hollow cylindrical core of magnet as the cylinder of pump and attach the ram to
the centre rod on the Armature. Or the centre rod may itself act as the ram.
We also adjust the size and shape of centre iron rod and outer rims of Armature
so that the increase of attraction of the Magnet in the Armature (as latter
approaches former) may increase in a ratio equal to that of the resistance offered
by the compression of air. By this means the pump can be made to force air up
to an exceedingly high pressure with a comparatively small expenditure of power.

page_text: We STANLEY CHARLES CUTHBERT CURRIE of 75 Jermyn Street Piccadilly
Gentleman and ILLIUS AUGUSTUS TIMMIS of N° 2 Great George Street West-
minster S.W. Civil Engineer both in the County of Middlesex do hereby declare
the nature of our invention for AN ELECTRIC AIR PUMP and in what manner the
same is to be performed, to be particularly described and ascertained in and by
the following statement :-
We attach to the armature of an Electro-Magnet (generally of the form
specified in the said Stanley Charles Cuthbert Currie's Patent No 3712-1882) a
suitable contact maker & breaker so as to break the electric current running
through magnet when the armature is a given distance from the "home" position
and make contact again when armature has returned a given distance from the
magnet. This return of the armature can be effected by means of a spring or
weight or in the case of two magnets working alternately the armature can be
arranged to balance one another so that when one magnet is cut out of circuit the
other is put in.
To the armature or armatures thus arranged we attach a piston rod working
an Air Pump (exhaust or compression). In the case of using the magnets made
according to the above mentioned patent we make use of the centre soft iron
hollow cylindrical core of magnet as the cylinder of pump and attach the ram to
the centre rod on the armature. Or the centre rod may itself act as the ram.
We also adjust the size and shape of centre iron rod and outer rims of armature
so that the increase of attraction of the magnet in the armature (as latter
approaches former) may increase in a ratio equal to that of the resistance offered
by the compression of the air. By this means the pump can be made to force air
up to an exceedingly high pressure with a comparatively small expenditure of
power.
DESCRIPTION OF THE DRAWINGS.
Fig. 1 is a vertical section showing the magnet hereinbefore referred to. When
a current of electricity is passed through the wires f, f to the bobbin the armature
is attracted to the bobbin & brought to its home position as shown in Fig. 1. The
centre rod of soft iron A attached to the armature has continuous with it the
piston rod B which when the armature is brought home forces air through the
valve E and out at the outlet pipe F into the air chamber. When the current is
broken the armature returns to its normal position & with it the piston rod B
consequently sucks the air through the inlet pipe c through the valve D into the
space left by the piston rod.
The same remarks apply to Fig. 2 which represents the magnet in section and
the valves and pipes at some distance from the magnet partly in section_and
partly in elevation. The magnet is thereby connected with the proper piston P by
means of connecting rod R

page_text: Figs. 3 and 4 are plans of Figs. 1 and 2 respectively. The same letters of
reference apply to all the figures of the Drawings.
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 compression of air by means of successive strokes of the centre rod of a
magnet acting as or acting in conjunction with a piston as hereinbefore described.
1534
*p**
100
I. A. TIMMIS,
Agent for the said S. C. C. Currie & self.