IMPROVEMENTS IN MACHINERY BELT FASTENERS
Year: 1879

page_text: LETTERS PATENT to George Sonnenthal, of Lambeth Hill, Queen Victoria
Street, in the City of London, for the Invention of "IMPROVEMENTS IN
MACHINERY BELT FASTENERS." A communication from abroad by Rudolf
Zorn and Friedrich Hülle, Engineers, both of Berlin.
PROVISIONAL SPECIFICATION left by the said George Sonnenthal at the
Office of the Commissioners of Patents on the 8th May 1879.
GEORGE SONNENTHAL, of Lambeth Hill, Queen Victoria Street, in the City of
London. "IMPROVEMENTS IN MACHINERY BELT-FASTENERS." [A communication
from abroad by Rudolf Zorn and Friedrich Hülle, Engineers, both of Berlin.]
This Invention of improvements in machinery belt-fasteners relates to the
fastenings used for joining the ends of leather or other bands used in driving
machinery. It consists of a pair of screw rivets, bosses, or studs in metal, one stud
screwing into the band to be lapped on to the other portion in a hole punched into
the band up to the head or boss, the screwed portion being preferably conical and
large enough to allow it to be perforated and tapped with an internal screw thread,
such thread being opposite to the outer screw, that is, if the outer screw screwing
into the leather is a right thread the internal thread is a left one, and vice versa.
The other boss and screw to fit the internal thread is passed through a corre-
sponding hole in the band and screwed into the first screw and boss; both portions
of the band are then held firmly by the combined screws, the bosses holding the
leather firmly; suitable heads with holes or slits are made in the bosses to enable
a screw driver or tool to bring the bosses tightly upon the leather. The contrary
direction of the screws prevent the screw fastenings becoming loose. The under
sides of the bosses are scored or ringed to let the leather bed into them.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said George Sonnenthal in the Great Seal Patent Office on the 7th
November 1879.
GEORGE SONNENTHAL, of Lambeth Hill, Queen Victoria Street, in the City of
London. "IMPROVEMENTS IN MACHINERY BELT FASTENERS." A. communication
from abroad by Rudolf Zorn and Friedrich Hülle, Engineers, both of Berlin.
This Invention of improvements in machinery belt fasteners relates to the
fastenings used for joining the ends of leather or other bands used in driving
machinery. It consists of a pair of screw rivets, bosses, or studs in metal, one stud
screwing into the band to be lapped on to the other portion in a hole punched into
the band up to the head or boss, the screwed portion being preferably conical and
large enough to allow it to be perforated and tapped with an internal screw thread,
such thread being opposite to the outer screw, that is, if the outer screw screwing
into the leather is a right thread the internal thread is a left one, and vice versu.
The other boss and screw to fit the internal thread is passed through a corre-
sponding hole in the band and screwed into the first screw and boss, both portions
of the band are then held firmly by the combined screws, the bosses holding the
leather firmly, suitable heads with curved holes or slots are made in the bosses to
enable a screw driver or tool to bring the bosses tightly upon the leather; the slots
for these screws are made in the thick part of the flange in the conical part of the
screw boss, as shewn at Figure 5. The contrary direction of the screws prevent
the screw fastenings becoming loose. The under sides of the bosses are scored or
ringed to let the leather bed in them.
In the Drawings accompanying and forming part of this Specification, Figure 1
is a view of two portions or ends of belting fastened together; Figure 2, section of
Figure 1 through the entire line of two screws; Figure 3, the large screw, with
the boss screwing into the leather shewn as a right thread and on a larger scale
than Figures 1 and 2; Figure 4, the inner screw and boss screwing into the shank
and boss, Figure 3, and shewn with a left thread and on a larger scale than Figures
1 and 2 Figure 5, the part section of Figure 4, to shew the form of slot.
The screws and heads may be made of any suitable metal, but it is preferred to
have the one size in brass and the other in iron or steel. The larger boss is made
conical so as to bed more solidly in the leather. Both bosses are made with the
slot, shewn in Figure 1, to hold the screw driver for bedding the large boss in the
leather and for screwing the interior screw into the outer one.
Having now described and particularly set forth the nature of the said Inven-
tion, and the manner of carrying the same into effect, I would have it understood
that what I claim is,-
First. The bossed screws with right and left threads for fastening together the
ends or parts of machine belting, substantially as described.
Second. The conical form of the large screw for screwing into machine belting
for the purpose shown, substantially as described.
Third. The specific form of the slots, as shewn, in the screw bosses for the screw
driver, for the specific purpose of tightening right and left screws together for
fastening machine belting together, substantially as described.
In witness whereof, I, the said George Sonnenthal, have hereunto set my
hand and seal, this Sixth day of November, One thousand eight hundred
and seventy nine.