A New or Improved Distance-measurer or Range Finder.
Year: 1895

page_text: Date of Application, 29th Nov., 1895-Accepted, 14th Mar., 1896
COMPLETE SPECIFICATION.
A New or Improved Distance-measurer or Range Finder.
I, GOTTLIEB KIмMICH, of 9 Mittlere Beutau, Esslingen, in the Empire of
Germany, Mechanical Engineer, 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 reference to a new or improved distance measure, consisting
mainly of a tube to receive the ocular glasses and provided with a graduated scale,
and of a second tube carrying the objective glass. Both tubes are connected by screw-
joints and have to be screwed against one another until the object-the distance of
which is to be ascertained-appears distinctly visible, whereupon the distance can
be read off the scale.
A side view of the distance measurer is represented in Fig. 1 of the accompanying
drawings
Figure 2 is a sectional view on line ex of Figure 1 and
Figure 3 is a section on line y, y, of Figure 1.
The instrument is mounted on a tripod or other stand capable of being turned such
as is indicated at A and consists of a tube a containing the ocular glasses, and of the
tube 6 carrying the objective glass, which is connected with the former by the screw-
joints c.
The screw-joints possess a definite graduation, say, for example, of 1 in/m
(millemetre). On the tube a is affixed or marked the scale d, which corresponds
to the graduation of the screw-joints c, besides this the ring at the back e of the
tube 6 possesses division lines f from 1 to 100. Between the first and second lens
of the tube a a cross of threadsy is arranged.
In using the instrument, it will have to be put into position in such a manner that
the bind-edge of the ring e of the tube & rests on the point of zero of the scale d of
the tube a.
Thereupon the instrument will have to be directed upon the object, and the
tube a must be turned in the tube b until the object appears in the same distinct
outlines as the cross of threads g. After that you read off the scale d the number
of that division line, which now lies on the hind-edge of the ring e, whereas on
the division lines of the ring itself will be read off the decimal figures, which
have to be added to the number just obtained. As the scale of the tube a is
made in such manner that each line corresponds with a distance of 100 metres, it is
necessary to multiply the numbers read off by 100, in order to arrive at the figures
which express the distance of the object.
In order to make the instrument serviceable for any eyesight, an arrangement
has been affixed on the tube a, consisting of a bracket arm and sighting tube h and
a bar i provided with a scale, the slider or indicator k, of which is provided with
numbers (for instance, 9. 10. 11. 12.
•
).
The scale of the bar i is executed in such wise that on each side of the point of
zero, corresponding to the normal sight, numbers have been placed. The numbers
on the further side of the point of zero indicate numbers of the glass for long-
sighted people, which should be placed before the ocular glass of the tube a, and
those ou this side of the point of zero, on the other hand, indicate the number of
the glass for short-sighted people. Before using the distance measure, the
indicator k is pushed along, until the numbers affixed on the latter are distinctly
visible to the eye looking through the sighting tube h, whereupon the number
indicated on the bar i according to the position of the indicator k is read off and

page_text: the glass corresponding to it will be affixed in the proper manner in front of the
ocular glass.
Having thus 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 :-
1. A distance measurer or range finder consisting of two screw-joints of a definite
graduation, with tubes a and b connected with one another, of which the one a
contains the ocular glasses, as well as the cross of threads and is besides pro-
vided with a scale d corresponding with the definite graduation of the screw-joints,
whereas the tube b carries the objective glass, substantially as described and shewn
in the drawings.
2. In connection with the distance measurer claimed under Claim 1 herein, an
arrangement of a bar i provided with a definite scale the movable indicator k of
which, will be slid along on the bar i until the signs appear distinctly visible to the
eye of the person ascertaining the distance of an object through the sighting tube h,
for the purpose of ascertaining by means of the position of the indicator k on the
pole, the number of the glass which has to be affixed in front of the ocular glass,
which number corresponds with the eyesight of the person ascertaining the distance
in comparison with normal sight, substantially as described and shewn.
Dated this 29th day of November 1895.
HUGHES, ELI & HUGHES,
76, Chancery Lane, London, W.C., Agents for the Applicant.