Improvements in Apparatus for Electrically Winding Up, or Giving Tension to, Driving Springs.
Year: 1899

page_text: Date of Application, 25th Oct., 1899-Accepted, 9th Dec., 1899
COMPLETE SPECIFICATION.
Improvements in Apparatus for Electrically Winding Up, or Giving
Tension to, Driving Springs.
We, HERMANN ARON, Ph.D., of 6, Lutzow-strasse, Berlin, in the German
Empire, Professor and ARON ELECTRICITY METER, LIMITED, of 46, Upper
Thames Street, in the City of London, 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 relates to improvements in apparatus for electrically winding
up or giving tension to springs, of the class for which Letters Patent No. 24876
of 1894 were granted to one of us (Hermann Aron).
In practical use the apparatus constructed as described and claimed in the
Specification of the said Letters Patent has not proved entirely satisfactory, for
the reason, that the small spiral-spring serving to conduct the current from
the coil of the electro-magnet, or solenoid, to the swinging armature is liable
to break thus opening the electric circuit and interrupting the motion of the
apparatus.
The object of the present invention is to provide means whereby this objec-
tion is avoided.
In the accompanying drawing, is shewn in side elevation in Figure 1 and in
sectional front elevation in Figure 2 an apparatus for electrically winding up,
or giving tension to, springs the said apparatus including improvements
according to this invention.
The electro-magnet a carrying on its neutral, portion the energising coils,
is secured between two brass-plates m¹, and m², receiving the journals of the
axis c, carrying, (so as to turn upon it) the swinging armature b. Secured to
the said armature b and insulated from it, is an arm k, embracing the ratchet-
wheel e, and carrying two projecting pins b', and h. To the front of the
plate m², and insulated from it, is secured another small brass-plate m³, to
which the current is fed from the coils by means of a conducting wire 7 and
to which is adjustably secured the driving spring g to be wound up or to have
tension imparted to it for driving clock-work or the like. The said spring g
according to this invention is utilised to convey the current from the small
plate m³ to the pin 6¹ projecting from the arm k, which being secured to the
armature as aforesaid partakes of the swinging motion of said armature.
The other pin h, projecting from the said arm k, serves as a make and break,
to open and close the circuit, at the proper time, as fully described in the
Specification of the aforesaid Letters Patent No. 24876 of 1894. A small
cylinder d adjustably fixed by means of a screw f serves to adjust the tension
of spring 9, and thereby to control the play of the return-stroke of the
armature b. The other end of the said spring g, is shewn in the drawing as
being, not rigidly secured to the pin b1 of the arm k, but as having a sliding
contact upon the said pin b¹, it engaging the said pin by its curved or hook-
shaped, end but this end of the said spring g, may if desired be secured to a

page_text: small adjustable cylinder, adjustably fixed by means of a screw as shewn with
regard to the cylinder d and screw f at the other end of the spring.
The described arrangement of the spring g, offers besides the advantages
before stated, the further advantage of allowing ready access, and of facilitating
fitting and repairs.
Having now particularly described and ascertained the nature of this inven-
tion and in what manner the same is to be performed we declare that what
we claim is :-
1. In apparatus for electrically winding up, or imparting tension to, driving
springs, the combination,, with an electro-magnet or solenoid of a swinging
armature b an insulated arm k carried by the said armature and carrying the
pins band h and a driving spring g, connected to the said pin and serving
to convey the current to said pin 61 and thence to the pin h substantially as,
and for the purpose, herein before described.
2. In apparatus for electrically winding up, or imparting tension to, driving
springs, the combination with an electro-magnet or solenoid of a swinging
armature b, an insulated arm k, carried by the said armature and carrying the
pin h, a driving spring g, connected to the said arm k, so as to convey the
current thereto and an adjustable cylinder, or adjustable cylinders (such as d)
to which one, or both, ends of the said spring is, or are secured for adjusting
its tension, substantially as, and for the purpose herein before described."
Dated this 25th day of October 1899.
JOHNSONS & WILLCOX,
47, Lincoln's Inn Fields, London, W.C., Agents.