Year: 1886

page_text: Date of Application, 3rd Sept., 1886.
Complete Left, 1st June, 1887.
Complete Accepted, 1st July, 1887.
We GUSTAV FALTER, Senior, and JULIUS FALTER, Junior, both of Munich, in the
Empire of Germany, Mathematical Instrument Makers, do hereby declare the nature
of our said invention to be as follows :-
The object of our invention is to manufacture an improved form of instrument for
horizontal and vertical application.
We construct our improved instrument with a horizontal bar, in which a recess is
provided to receive an ordinary glass tube, commonly known as a spirit level. This
tube is mounted in an adjustable frame, with a screw at one end to raise it, and a
spring to press it downwards.
At one end of the bar a short hinged bar is fitted also capable of adjustment in a
horizontal position by means of a screw and spring. This short bar can also be
raised to a vertical, or any other position for testing and proving the angles of articles
in other positions than that of the horizontal.
Our invention is simple in construction, of small cost, and easy in manipulation.
It can also be readily adjusted by any ordinary working man, without the assistance
of a skilled artisan.
GEO. DOWNING,
Agent for Applicants.

page_text: We, GUSTAV FALTER, senior, and JULIUS FALTER, junior, both of München, in the
Empire of Germany, Manufacturers, do hereby declare the nature of our invention,
and in what manner the same is to be performed to be particularly described and
ascertained in and by the following statement :-
The object of this invention is an instrument by which both horizontal and vertical 5
adjustment may be obtained, and by which if desired angles of inclination may be
adjusted or measured.
Referring to the accompanying drawings
Fig. 1 is a side elevation partly in section of the essential part of the improved
instrument.
Fig. 2 is a plan view thereof.
Fig. 3 is a perspective view on a smaller scale of the instrument, showing the
means for measuring or adjusting angles of inclination, said means being omitted in
the other figures.
S is a bar of hard wood or other suitable material, the under surface being 1
perfectly straight and even. On the upper side, or otherwise conveniently upon
the bar, is pivoted by a pin a² passing through lugs fixed to the bar, an angular
frame preferably of iron or other metal having two arms or wings a a radiating
from the pivotal point of the frame and at a right angle with each other. Into a
recess in one of the arms which is suitably formed to receive it, is fixed a level bulb
of usual construction. A metal plate may be screwed over said recess to retain the
bulb, the said plate having a suitably shaped perforation for viewing the bulb and
means for ascertaining the centering of the bubble of the said bulb.
The level is adjusted with regard to the under surface of the bar S by turning the
respective adjusting screw f situated one at the outer end of each of the arms a of the
angle frame springs g or other equivalent devices may be so fixed on the bar S as
to retain the respective arm a with the points of the screw f in contact with the bar S
against accidental displacement.
In using the instrument for horizontal adjustment the arm a containing the level
bulb is turned down onto the bar S, the level of the under surface of the bar S that is
to say of the surface to be adjusted, being indicated by the centering of the bubble of
the level bulb in the usual manner. In using the instrument for vertical adjustment,
the arm containing the level bulb is turned upward, and the opposite arm a brought
under its retainer g. The true vertical of the bar S being seen also by the centering
of the bubble of the level bulb.
When the instrument is also to be used for the measurement or adjustment of
angles of inclination, an arm or indicator z having at its end a transversely
adjustable bevelled edge, is attached to the frame a a at or about its pivotal point.
Upon the side of the bar S is relatively fixed a segment or are of a circle o divided

page_text: and numbered in the usual manner. In measuring and adjusting angles, the bulb is
brought level and the degrees indicated by the arm z.
Having now particularly described and ascertained the nature of our said invention
and in what manner the same is to be performed, we declare that what we claim is
:-
1. The combination of the bar S with the angle frame a a carrying level bulb
pivoted thereto and capable of adjustment substantially as and for the purpose
set forth.
2. The combination of the bar S and angle frame a a carrying level bulb with the
indicator z and segment o substantially as and for the purpose set forth.
For G. & J. FALTER,
Herbert & Co.,
67, Strand, WC.,
Agents to Applicants.
For G. & J. FALTER,
Herbert & Co.,
67, Strand, WC.,
Agents to Applicants.