An Improved Plumbing, Levelling, and Angle Measuring Instrument for Use in Building.
Year: 1899

page_text: Date of Application, 1st Dec., 1899-Accepted, 26th May, 1900
'
COMPLETE SPECIFICATION.
An Improved Plumbing, Levelling, and Angle Measuring Instrument
for Use in Building.
I, AUGUST GAEFKE, Junior, of 29, Krautstrasse, Barmen, in the Empire of
Germany, 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 an apparatus the use of which obviates the tedious
plumbing and levelling which occur in the construction of walls.
The invention is illustrated in the accompanying drawing, in which
Fig. 1 is a side view of the apparatus generally.
Fig. 2 a section along the line A-B showing the application of the apparatus
to a wall.
Fig. 3 is a view of the bottom end of the apparatus.
The apparatus consists of two broad planks or boards a and b, which are
firmly joined together at any desired angle, and may be of any length as pre-
ferred.
At any distance from each other, hooks c c are adjustably attached to the
planks or boards. These hooks serve as holding arms for the apparatus and
when not in use, are laid against the latter and retained in any suitable manner,
for instance, by means of catches d.
On the outer longitudinal edges of the apparatus, which are suitably sloped,
a graduated scale e is arranged which enables the lines to be precisely adjusted.
The lines is fastened to the line holders f which are fixed to dovetail strips g
adjustably arranged in corresponding guides on the planks or boards a b.
For facilitating the adjustment of the strips g, a handle h is provided thereon,
and for fixing the same at the desired height a screw is inserted therein.
On the foot of the apparatus, the holding plate is arranged which enables the
apparatus to be supported in the joint between the bricks whilst in the upper part
are two water-levels by means of which the apparatus can be precisely ad-
justed.
The use of the apparatus is as follows:-
―
The angle between the sides a b must correspond to that at which two walls
are to meet together. When three or four layers of bricks have been laid, this
apparatus, with the foot plate is pushed into the joint between two bricks.
After the apparatus has been vertically adjusted, the further brick-laying is
proceeded with, the contact bricks of the two walls being inserted exactly in the
angle formed by the two planks or boards a and b.
As the brickwork proceeds the adjustable hooks c, c', come into use; they
being inserted in the seams or joints of the brickwork, and thus increasing the
hold of the apparatus.
If a long wall be erected from two opposite ends, the described apparatus
will be employed at each end, and as a guide for the bricklayers in setting the
brickwork lying between them, the line is stretched from the one apparatus

page_text: to the other, the precise horizontal position and adjustment of which is effected by
means of the strip g which can be adjusted on the graduated scale e.
As soon as the brickwork is carried to the top of the apparatus, the hooks c
are released and the apparatus removed from the brickwork, the foot plate k
being drawn away from under the bricks lying, above it.
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
Apparatus for use in building for plumbing and levelling walls, the distinguish-
ing feature of which consists in two planks or boards a and b firmly connected
together at any desired angle, with a holding plate k arranged on the foot, on
which apparatus are adjustably mounted line holders, secured to strips g
and hooks so attached as to be capable of being turned round and adjusted.
Dated this 1st day of December 1899.
WHEATLEY & MACKENZIE,
40, Chancery Lane, London, W.C., Agents.