Improvements in Spring-motors.
Year: 1890

page_text: Date of Application, 12th June, 1890
Complete Specification Left, 10th Mar., 1891-Accepted, 2nd May, 1891
PROVISIONAL SPECIFICATION.
Improvements in Spring-motors.
I, JOHANNES CARL ECKARDT, of Stuttgart, in the Kingdom of Würtemberg,
in the German Empire, Manufacturer, do hereby declare the nature of this invention
to be as follows
My invention relates to improvements in spring-motors and the object of this
improvement is to prevent the breaking of the spring. I attain this object by the
mechanism illustrated in the accompanying drawing, in which similar letters denote
similar parts throughout the several views.
Fig. is a plan view,
Fig. 2 is a side-view of the whole mechanism,
Figs. 3, 4 & 5 show the different parts of the invention.
The trundle c
The cog-
is firmly attached to the axle c', and the trundle z a¹ to the axle a.
wheel sits loosely on the axle a and is prevented from moving sidewards by the
projections firmly attached to the axle a. A. pin is secured to the latter, and
the base-plate of the apparatus carries a lever fg with the tooth h, as illustrated in
Fig. 5. A spring presses on the lever fg so that its end catches in the teeth of
the ratchet wheel b¹.
A bent plate bears the vertical axle c' and the horizontal axle a.
k
The trundle or cog-wheel c bears a pin d, so arranged as to gear with the cog-
wheel b, and to turn this wheel at any rotation of the wheel c by overcoming the
action of the stopping-device jgk of the wheel &', coupled with wheel b. The
wheel has the projection e.
The working of the safety-device is as follows:
The axle c' is coupled with the axle of the spring-box not shown in the drawing,
The pin d
and acting as motive power of the apparatus in the well-known manner.
firmly attached to the trundle c revolves continuously and gearing with the wheel b
turns this wheel coupled with the wheel. The pin d turns the loose wheel b for
the distance of two teeth, and when leaving the wheel b, the latter is again secured
in its position by the lever fig and spring k
The projection e on the wheel & gradually turned by the influence of pin d upon.
the wheels has raised the lever fg, so that the tooth h of the lever lies close to
the rotating axle a, and the pin i when revolving with the axle a pushes against
this tooth and prevents further revolution of the axle a and of the apparatus.
As easily to be seen the tension of the spring in the spring-box is limited by this
safety-device, because it allows a certain number of revolutions only to the axle a
with the trundle z a' and to the trundle cand axle d' the latter gearing with the
spring-box. The tension of the spring in the spring-box is attained by turning the
handle w and the axle a with trundle z a'. The trundle z a' gears with the trundle c
and effects the rotation of the axle c'.
2
Dated this 12th day of June 1890.
JOHANNES CARL ECKARDT.
By Rayner & Cassell,
Agents for the Applicant.

page_text: COMPLETE SPECIFICATION.
Improvements in Spring-motors.
I, JOHANNES CARL ECKARDT, of Stuttgart, in the Kingdom of Würtemberg,
in the German Empire, Manufacturer, do hereby declare the nature of this inven-
tion, and in what manner the same is to be performed, to be particularly described
and ascertained in and by the following statement :-
My invention relates to improvements in spring-motors, and the object of these
improvements is to prevent the breaking of the spring. I attain this object by the
mechanism illustrated in the drawing, sent in with Provisional Specification, in
which similar letters denote similar parts throughout the several views, and in.
which :-
Fig. 1 is a plan-view,
Fig. 2 is a side-view of the whole mechanism,
Figs. 3, 4 and 5 show the different parts of the invention.
A bent plate bears the vertical spindle and the horizontal shaft a.
C
The
trundle is firmly attached to the spindle c¹, and the trundled to the shaft a.
The cog- and ratchet-wheel sits loosely on the shaft a and is prevented from
moving sidewards by the collars firmly attached to the shaft a. A pin is
secured to the latter, and the base-plate of the apparatus carries a lever g with
the tooth, as illustrated in Fig. 5. A spring presses on the lever fg so that its
end
k
tends to catch in between the teeth of the ratchet-wheel b¹.
The trundle or cog-wheel e bears a pin d, so arranged as to gear with the cog-
wheel b, and to turn this wheel at every rotation of the wheel e by overcoming the
action of the stopping-device fg k of the wheel &, coupled with wheel b. The
wheel has the nozzle e.
The working of the safety-device is as follows:
The spindle is coupled to the shaft a of the spring-box not shown in the
drawing, and acting as motive power of the apparatus in the well-known manner.
The pin firmly attached to the trundle revolves continuously and, gearing with
the wheel, turns this wheel coupled to the wheel b. The pin d turns the loose
wheel as much as the distance of two teeth, and when leaving the wheel b, the
latter is again locked in its position by the lever fg and spring k.
The cog- and ratchet-wheel having made a certain number of movements by
the repeated action of the revolving-pin d, arrives at the position shown in Fig. 5,
which is also the starting position of the mechanism for winding up.
In this figure
the nozzle e being firmly attached to, or cast on to, the ratchet-wheel has just
raised the lever fg; so that the tooth of the lever lies close to the rotating
shaft and the pin, when revolving with the shaft a, knocks against this tooth
and prevents any further revolution of the shaft a and of the apparatus.
ag
As may be casily seen the tension of the spring in the spring-box is limited by
this safety-device, because it only allows a certain number of revolutions of the
shaft a and the trundle a' and also of the trundle and spindle c', the latter
gearing with the spring-box. The tension of the spring in the spring-box is
attained by turning the handle w and the shaft a with trundle = a.
trundle z a¹ gears with the trundle c and effects the rotation of the spindle c¹.
The arrows in the drawing indicate the motion of the mechanism while
winding up.
The
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
_
In a spring-motor :

page_text: 2. A trundle (a) keyed unto a shaft (a) and gearing into the cogs of a
trundle (c) keyed unto a spindle (c) and provided with a pin (d) to operate on a
cog-wheel (b) and a ratchet-wheel (1) both coupled together and running loosely
on the shaft (a) as described.
3. A cog and ratchet-wheel (661), running loosely on a shaft (a), and being pro-
vided with a nozzle (e), in combination with a double lever (fg), one arm of which
gearing into the ratchet wheel (61) and the other being influenced by a spring (k),
as described.
4. A shaft (a) having keyed thereon a trundle (a) and carrying loosely,
between two collars (a) a cog- and ratchet-wheel (b) and at its rear end a
pin () in combination with a double lever (fg) of which one arm (f) gears at its
end into the ratchet-wheel (6) and the other arm (y) being provided with a
tooth (h) is at its end influenced by a spring (k) as described.
5. The spindle (e), the trundle (c) keyed thereon and gearing into the
trundle (z a) keyed unto the shaft (a), which carries loosely the combined cog- and
ratchet-wheel (b b') and having attached to its rear end the pin (i), the ratchet-
wheel (6) being provided with a nozzle (e) and the trundle (a) carrying a
separate tooth (d) to actuate the rotation of the. cog-wheel (b), in combination with
a double lever (fg), of which one arm (f) gears at its end into the ratchet-
wheel (6) and the other arm (g) being provided with a tooth (h) is at its end.
influenced by a spring (%) as described.
Dated this 7th day of March 1891
JOHANNES CARL ECKARDT.
By Rayner & Cassell,
37, Chancery Lane, W.C., Agents for the Applicant.