Improved Device for Enabling Bolts and the Shanks of Various Articles to be Easily Secured in Walls and the like.
Year: 1897

page_text: Date of Application, 22nd Feb., 1897-Accepted, 15th May, 1897
Improved Device for Enabling Bolts and the Shanks of Various
Articles to be Easily Secured in Walls and the like.
A communication from abroad from the Firm SAMSON GEBRÜDER, of Hamburg,
Germany.
I, WILLIAM LLOYD WISE of 46 Lincoln's Inn Fields, in the County of
London, Consulting Engineer and Chartered Patent Agent, 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 improved device for enabling bolts and the shanks of
various articles to be easily fastened in masonry, stone, &c., and subsequently
removed therefrom at any time without difficulty. The bolt, or the article to
which the shank belongs, may be employed, according to the form of its outer end,
for the most varied purposes-e.g., as a lamp or clock hook, a curtain-holder, an
insulator-support-and it can also serve for fastening plates, angles, brackets, or
similar articles.
The accompanying drawings represent three different constructions of the
improved device.
Fig. 1 is a longitudinal section showing the bolt projecting loose into the
masonry, the outer end of the bolt being in this case formed as a hook,
Fig. 2 is a side view of the same example, showing it tightened up, and
Figs. 3 and 4 show cross sections according to the lines A B and C D of Fig. 2;
Figs. 5 and 6 are elevations of another example, showing it loose and tightened
up respectively;
Fig. 7 is an elevation of a third example.
The bolt or shank a, (hereinafter referred to as a bolt) which may advantageously
be of rectangular cross section as shown in Figs. 3 and 4, has a screw-threaded
rear end on which a nut b is screwed, whilst the front and likewise screw-threaded
end carries a second nut c. The end projecting out of the nut c may be formed as
a hook, an eye, or the like or even be cut off smoothly. Between the two nuts
there are placed two or more sleeves d, d', d³. . . of circular cross section, which
surround the bolt and may be externally roughened and which have internally a
rectangular hole f of the same breadth as, but greater height than, the bolt, which
allows the sleeves to be shifted transversely to the bolt. The adjacent end surfaces
of the sleeves are made oblique to the axis of the sleeves so that the sleeves can
slide with their end-surfaces on one another as soon as, by screwing up the front
is reduced. In order to prevent
nut the distance between the two nuts band
C,
the outer edge of the hole in which the bolt is inserted, from being injured by the
outward pressure of the outer sleeve, it is advantageous to arrange in front of
the sleeves, a tubular piece g, which is not movable transversely to the bolt.
If the nut c be screwed up after the bolt has been put into the hole in which it
is to be fastened, the sleeves d, d', d³, . . . will be shifted relatively to one another,
because the distance of the two nuts b and c from each other will be reduced, the
sleeves being prevented from being pushed off the bolt by the nut 6 (which forms
an abutment) so that they press against the wall of the hole. On screwing-up the
nut further, they are clamped so firmly together in the hole that the bolt becomes
absolutely fast in the hole, especially when the outer periphery of the sleeves is
roughened.

page_text: Instead of arranging the clamping-sleeves only on the rear end of the bolt, as
shown in Figs. 1 to 6 inclusive, they may be put on at the rear and the front,
as shown in Fig. 7, and be separated by a distance-tube h; or they may take up
the entire length of the bolt.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed I declare that what I
claim is :-
1. An improved device for enabling a bolt or shank to be easily and detachably
secured in walls and the like in which the bolt or shank has a stationary nut serving
as an abutment, a movable nut, and two or more sleeves, which are arranged
between the nuts, surround the bolt or shank, and have their adjacent ends oblique
to their axis, and which are each provided with a longitudinal hole, which, when
the distance apart of the two nuts is reduced by screwing-up one of them, allows the
sleeves to be shifted perpendicular to the axis of the bolt or shank and the bolt or
shank to be thereby fixed in a hole.
2. In a device of the kind referred to in the preceding claim, a sleeve incapable
of lateral displacement on the bolt or shank and arranged on the bolt or shank in
front of the clamping sleeves, for the purpose of preventing the front edge of the
hole from being injured by the outward pressure of the outer sleeve.
3. My improved device constructed, arranged, and operating substantially as
herein before described with reference to and shown in Figs. 1 to 4 inclusive, or as
modified according to Figs. 5 and 6, or according to Fig. 7, of the accompanying
drawings.
Dated thin 02nd J
1007
W. LLOYD WISE,
46 Lincoln's Inn Fields, London, W.C., Chartered Patent Agent.