Improvements in Boundary-stones.
Year: 1896

page_text: Date of Application, 12th Dec., 1896-Accepted, 13th Feb., 1897
Improvements in Boundary-stones.
I, CARL BRANZKE, of München-Gladbach, in the Province of the Rhine,
German Empire, Architect 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 refers to boundary-stones, and relates to making such stones able
to serve as surveying-stones; in other words, the boundary-stone shall be able to
receive the surveying-pole or -staff, and to hold it in proper position. I attain that
object in general, first, by providing the boundary-stone with a vertical tube
arranged in the medium-portion of the stone, and extending down into the same,
and second, by providing said tube with a clesing-device. The tube is to receive
and to hold the surveying-pole or -staff, and the closing-device is to prevent the
tube from getting filled with sand, dust and the like, during the time of its not
being used. The boundary-stone is to serve as a surveying-stone for a very long
time, and provisions must therefore be made to keep it in a useful condition for
such length of time. This is the reason for furnishing the stone with a pipe,
instead of with a corresponding hole only, or for lining such hole with a pipe
respectively, and for furnishing the latter with a closing-device, as afore stated.
In the form of construction shown as an example in the accompanying drawing
the tube a extends nearly through the whole length or height of the stone e, and
terminates at both ends in a slight distance from the respective surfaces of the
same. The lower end of the tube is closed by the material of the stone, the
upper end is open, and is provided with a short piece of tube i consisting of a non-
rusting material. The purpose of said piece of tube i is to secure the iron tube a
against easily rusting. I do not make a point, however, of thus securing the
tube a, but I may dispense with the piece of tube i, and let the tube a extend
upwards correspondingly higher. As to securing the tube a to the stone, I prefer
to cast the latter from a suitable material, for, instance so-called cement-beton;
the mould intended to receive the material is prior thereto furnished with the
tube a when the latter is surrounded by, and enclosed within, the stone whilst the
stone is thus formed.
The closing-device employed in the form of construction shown consist of a
plate o baving a vertically extending rod o'. The latter takes into the tube a,
and terminates at its lower end into a pivot o2 having a one-sided head o 3
(Figures 4 & 6). The latter forms an incline 04 (Figures 4-7) which is to take
below the inwardly projecting portion u' of a plate u fixed within a suitable slit of
the tube a.
When sinking the rod o' down into the tube a the position of the
head o 3 must be such that the latter can freely pass the plate u, or the portion u¹
of the same respectively, (see Figures 4 & 5). Thereafter the rod is turned by
means of its top-plate o when the inclined portion o4 of the head o 3 will take
below the portion u' of the plate u so as thereby to draw the top-plate o down upon
the top-surface of the stone.
T
I prefer to turn the rod o' not directly by the plate o, but by means of a key
(Figures 1 & 2) having lugs ; the latter may be put into recesses provided in
the rim of the plate o, and arranged one diametrically opposite to the other.
The top-surface of the stone has a circular shallow cavity el (Figure 3) into the
bottom of which is engraved a cross (shown in dotted lines in Figure 2). The
central portion of said cross is formed by the projecting portion of the piece of

page_text: tube i, and the centre proper of the cross is formed by, or coincides with, the centre
line of the tubes a and i. The stone is, of course, so dug into the earth that the
(imaginary) point of intersection of the legs of the cross is situated in the respective
boundary line.
To use the boundary-stone in surveying the tube a is made free by removing the
plate o and the rod o' by means of the key r, when the pointed end s¹ of the pole
or staffs (Figure 3) need simply be put into the piece of tube i, and the upper
portion of the tube a, as shown.
Marking boundaries by my improved stones offers great facilities for the surveying;
first, much time is saved by doing away with the repeated transplantation of the
pole or staff because the latter receives froin the beginning its proper and ultimate
position; second, a stony ground, or frozen earth, cannot hinder the staff from
being put in position, because the condition of the ground or earth is of no more
importance whatever.
Having now particularly described and ascertained the nature of this inven-
tion, and in what manner the same is to be performed, I declare that what I
claim is :-
1. A boundary-stone having a vertical tube adapted to receive a surveying-pole
or -staff, and means for closing said tube during the time of its non-use, for the
purpose as described.
2. A boundary-stone having a vertical tube adapted to receive a surveying-pole
or staff, and means for closing said tube during the time of its non-use; Baid
stone being formed by placing a mouldable material around the said tube, for the
purpose as described.
3. A boundary-stone having a vertical tube adapted to receive a surveying-pole
or-staff, and means for closing said tube during the time of its non-use; said stone
being formed by pouring liquid cement-beton into a mould containing the said
tube, for the purpose as described.
4. A boundary-stone having a vertical tube adapted to receive a surveying-pole
or staff, and means for closing said tube during the time of its non-use; the tube
consisting of iron, and having its top furnished with a special piece of tube
consisting of a non-rusting metal, for the purpose as described.
5. A boundary-stone having a vertical tube adapted to receive a surveying-pole
or staff; a plate adapted to rest upon the top of said stone, and a rod secured to
said plate, and reaching down into said tube; and means for locking said rod to
the said tube, for the purpose as described.
6. A boundary-stone having a vertical tube adapted to receive a surveying-pole
or staff, a plate adapted to rest upon the top of said stone, and a rod secured to
said plate, and reaching down into said tube; said rod having at its lower end a
reduced portión o 2, a portion o3 projecting from said reduced portion, and an
incline o4 forming part of said portion o 3; the tube having an inner projection,
such as u', for the purpose as described.
7. A boundary-stone having a vertical tube adapted to receive a surveying-pole
or -staff; a plate adapted to rest upon the top of said stone, and a rod secured to
said plate, and reaching down into said tube; means for locking said rod to said
tube, and a key adapted to be coupled to the said plate, for the purpose as
⚫ described.
Dated this 19th def
1000