Year: 1889

page_text: I, SIEGMAR ELSTER of 67 Neue Königstrasse Berlin in the Empire of Germany, Gas
Apparatus Manufacturer, 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 has for its object the automatic regulation of the supply of gas by
increasing or decreasing the pressure in accordance with the demand.
In order that the invention may be easily understood drawings are attached hereto
of which the following is a description. Fig. 1 is a vertical section of such a
governor tank and bell, with guiding apparatus in elevation, as is used when operated
upon by a corresponding weight. Fig. 2 is a plan of the same. Fig. 3 is an
elevation of the governor,. with a portion of the tank broken away, such as is used
when the loading and unloading of the bell takes place by the admission to or with-
drawal of water from a tank fixed on the top of the bell, and Fig. 4 is a plan of
Fig. 3.
In order to carry out this invention a bell A Fig. 1 is suspended by a wire, cord,
or ribbon B, from the periphery of a pulley C provided with a spiral D, taking its
spring from the centre of the pulley. This spiral bears a weight E by another cord,
so that according to the motion of the bell A the cord is either wound up or off
corresponding to the form of the spiral. As the weight rises it approaches the centre,
and as it falls it is gradually removed from the centre. This has the effect of
balancing the bell, more or less, by the weight E.
The limits of variation between which the changes of pressure is made may be
effected by causing the pulley C to be a multiple of the greatest lift of the bell and
the spiral to be of a greater measure. If the spiral is turned for a certain are round
the centre of the pulley it will be seen that the different positions of spiral and
pulley effect differences in the limit between which the alterations of weight take
place during one lift of the bell and these limits are so chosen as to be convenient.
The spiral is also used if instead of a solid body the loading material is a fluid like
water. In this case the arrangement is as follows. A Fig. 3 is the bell, B a cord
leading from the bell over the guide pulley L to the pulley C, this cord being strained

page_text: by a little weight P. Then instead of the weight E in Fig. 1,—the ribbon E Fig. 3 is
fastened to the spiral D as shown. Upon the bell A is placed the waterload K, the weight
of which depends upon the height of the level of the liquid. This level is determined
in a well known manner by a tube G, H, bent at right angles and movable round
one side of this angle as its horizontal axis, the tube being used as a discharge
conduit. The radial part of the angle tube forms a changeable overflow according to
its angle with the horizon, the discharge being by the conduit at I Fig. 4. This
arrangement is connected with the spiral in such a manner that a pulley F on the
tube & receives at its periphery the cord or ribbon E and thus causes the variations
of the level in K, after being acted upon by the bell A, the cord B, the pulley C and
spiral D, and finally by the ribbon or cord E. Also in this arrangement there may
be employed a relative moving of the spiral and the pulley on the same axle.
Having now particularly described and ascertained the nature of the said inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is,
1. The construction of gas governors with a pulley C and spiral D together with
cord B and weight E, as herein described and shown on the drawings Figs. 1
and 2, and
2. The construction of gas governors when a water load is used, with cords B
and E, pulley L, pulley C, spiral D and weight P, arranged to act upon the angle
tube H, and as herein described and shown on the drawings, Figs. 3 and 4.
Dated this 11th day of January 1889
W. H. BENNETT,
Agent for the Applicant.