Improvements in Stands or Supports for Theodolites, Levels, Telescopes, and the like.
Year: 1898

page_text: .COMPLETE SPECIFICATION.
Improvements in Stands or Supports for Theodolites, Levels,
Telescopes, and the like.
I, ADOLF HEIN, of Hagen, Westphalia, in the German Empire, Surveyor, 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 the stands or supports of theodolites, levels, telescopes
or other instruments which are brought into their working or focussing position
automatically by means of a counterweight or pendulum.
The accompanying drawings to which I will hereinafter refer illustrate how my
improvements may be carried into effect.
Figure
stand.
shows in elevation an instrument such as a level in place upon its
Figure 2 represents in section details of the supporting device in one of its
positions.
Figure 3 similarly illustrates the details when they are in their locked positions.
The hollow hemi-sphere or the like a has attached to it and carries both the
instrument d and the pendulum or counterweight c, and is surrounded by a ring b
the interior of which is preferably formed to conform to the surface of the
hemi-sphere a. This ring is capable of being moved up or down and is preferably
mounted upon four pins h which pass easily through perforations formed in a
flange o of the ring. Helical or other springs i are arranged upon or in connection
with the pins in such a manner as to constantly force or tend to force the ring b
upwards and away from the hemi-sphere a. A lever is fulcrummed at k to the
base of the support and is divided or looped in its length so as to surround the
hemi-sphere a and come above the ring b. The front end of the lever is connected
by a link p with an excentric or cam by means of which the lever may be moved
up or down. q is a pin to act as a guide for the link which is slotted for its
reception. The base of the support or the table is formed or provided with a bridge
or cross piece f, upon which the hemi-sphere a is movably mounted, as, for example,
by means of a screw or studs and a small ball e, the end of the screw and the
surface of the bridge both being recessed for the reception or partial reception of
the ball.
When the différent parts are in the position illustrated by Figure 2 the level or
the like is free to assume its horizontal or other working position under the
influence of the pendulum or counterweight. The lever is pressed down
slightly so as to move the ring b on to the hemi-sphere a and thus exert a slight
breaking action which will prevent any violent movement of the instrument.
soon as the instrument occupies its proper position the cam is moved
downwards and the different parts are locked together as indicated in Figure 3.
Small set screws or the like m may be employed to establish communication
between the ring and the lever l.
As

page_text: Having now particularly described and ascertained the nature of my said
invention and in what manner the same is to be performed, I declare that what
I claim is :-
1. A stand or support for theodolites, levels, and the like, constructed and
arranged substantially as herein before described and as illustrated by the
accompanying drawings.
2. In a stand or support for a level or the like, a locking or retaining device
constructed and arranged substantially as hereinbefore described and
illustrated by the accompanying drawings...
as
W. E. HEYS & SON, .
Agents for the Applicant.