Process and Apparatus for Plastering Nails, Hooks, Staples, and the like in Walls.
Year: 1894

page_text: Date of Application, 2nd Feb., 1894-Accepted, 24th Mar., 1894
COMPLETE SPECIFICATION.
Process and Apparatus for Plastering Nails, Hooks, Staples, and the
like in Walls.
We, GUSTAV EDUARD MICHAEL and FRITZ MEJER, Proprietors of the Firm
of Mejer & Michael, Merchants of No. 1 Theaterplatz, Leipsic Kingdoin of
Saxony, and ALBERT SILBERMANN, Manufacturer of No. 74 Blumen Strasse,
Berlin, Kingdom of Prussia, Germany, do hereby declare the nature of our
invention and in what manner the same is performed to be particularly described
and ascertained in and by the following statement :-
The present invention consists of a process and apparatus for plastering nails,
hooks, staples and the like in walls and its object is to provide a more simple and
convenient method than hitherto whereby the mixing of the plaster previous to its
being plastered round the hook, nail or staple is avoided, as also much time in the
execution of the work saved.
This object is attained by means of cartridges, containing dry plaster of Paris,
the cartridge cases being made of a material capable of absorbing and passing
moisture, the said cartridges are then moistened and inserted into the hole cut in
the wall for the reception of the nail or hook by means of a syringe or plunger and
simultaneously burst, when the moistened plaster sets round the nail or hook
firmly cementing the same in position in the wall.
And in order to make this present Specification more easily intelligible reference
is had to the accompanying drawing in which similar letters denote similar parts
throughout the several views :-
Fig. 1 being a side elevation of the plunger casing,
Fig. 1 an end elevation of Fig. 1,
Fig. 2 a side elevation of the nozzle of the casing,
Fig. 2 an end elevation of a nozzle with square opening,
Fig. 2 a similar elevation of a nozzle with circular outlet,
Fig. 3 a side elevation of the plunger,
Fig. 3 an end elevation of same,
Fig. 4 a side elevation of the lower half of a plunger or cartridge carrier with
the cartridge therein,
Fig. 4 an end elevation of the same and
Fig. 5 a side elevation of the plaster cartridge.
a is the plunger casing open at both ends, bis a nozzle to fit onto one end of the
said casing and having a square or circular outlet c. d is the plunger, which may
be hollow or solid but must in the former case have its end closed. A is the
plaster of Paris cartridge, which may be made in any convenient size according
to the size of the orifice made in the wall for the hook, nail or staple, said
cartridge is formed of dry plaster of Paris, surrounded by a casing of some
suitable material, for instance blotting paper, said material being capable of
passing water.
In practice, the cartridge is first moistened, i.e. it is placed inside the plunger
casing and the whole laid or immersed in water for the space of about one minute.
The nozzle is now or previously placed over the end of the cylinder a and the
latter placed in position at the mouth of the hole in the wall which is to be filled
out. The plunger d is now inserted at the back end of the cylinder and forced into
the same, whereby the cartridge will be burst and the moist plaster of Paris will be
forced out at the outlet c into the hole round the hook, nail or staple, filling out
the same and hardening in the usual manner.

page_text: Instead of employing a cylindrical plunger casing and a plunger, we can use a
sort of half round trough a (Figs. 4 and 44), into which the cartridge is laid and
inserted into the hole in the wall, the cartridge can then be burst whilst in the hole,
in any convenient manner.
The cartridges are made in various sizes, and may thus be chosen so as to about
fill out the hole in question thus causing very little or no waste of material as has
been hitherto the case, when the plaster had to be previously mixed, it being
practicably impossible to mix with a spaddle the exact quantity necessary for
each case.
Having now particularly described and ascertained the nature of our said inven-
tion and in what manner the same is performed we declare that what we claim
is:-
1. A process for plastering hooks, nails, staples and the like in walls, consisting in
the first placing a plaster of Paris cartridge, having a casing capable of passing
water, in a plunger casing having a nozzle, moistening the same as specified, and
forcing the contents of the cartridge into the hole in the wall round the hook, nail
or staple by means of a plunger substantially as described.
2. The combination of a plunger cylinder a having suitable nozzle b with outlet c,
a plunger d to fit said casing and a cartridge A containing plaster of Paris and
having a cartridge casing capable of passing water, substantially as described.
3. As modification the combination of a plaster of Paris cartridge, having casing
capable of passing moisture, with a trough a', for inserting said cartridge into the
hole in the wall, and means to burst said cartridge, substantially as described.
Dated this 2nd day of February 1894.
W. P. THOMPSON & BOULT,
Agents for the Applicants.