Improvements in Locking Bolts and Nuts.
Year: 1890

page_text: Date of Application, 19th July, 1890
Complete Specification Left, 16th Apr., 1891-Accepted, 16th May, 1891
PROVISIONAL SPECIFICATION.
Improvements in Locking Bolts and Nuts.
I, CHARLES HUELSER of the firm of Huelser & Co. of 142 Fleet Street in
the City of London, Solicitors of Patents, do hereby declare the nature of this
invention, a communication to me from abroad by Friedrich August Meischner of
35 Werder Strasse, Dresden in the Kingdom of Saxony, Empire of Germany,
Manufacturer, to be as follows:-
The object of this invention is a device for securing screws in their position by
means of a suitable number of ratchets or stop-teeth provided on the thread of bolt
and nut. These teeth are of uniform size and provided on those thread surfaces of
bolt and nut, which receive the pressure when the nut is being tightened. The
teeth of the nut pass at first along those of the bolt. On the nut being further
tightened, the teeth would clamp each other fast, to prevent which an elastic
intermediate plate is provided below the bolt head. The ratchet teeth of the nut
therefore slide, on further tightening of the latter, over, and are retained by, the
teeth of the bolt.
The securing attains its limit, when the teeth of the nut completely fill up the
interstices between the teeth of the bolt, and the elastic plate referred to cannot be
further compressed than the height of the ratchet teeth amounts to.
When the
fastening is to be undone either the intermediate plate is to be removed or the nut
pressed down for the height of the teeth and then turned back.
Dated this 19th of July 1890.
HUELSER & Co.,
Attorneys.
COMPLETE SPECIFICATION.
Improvements in Locking Bolts and Nuts.
I, CHARLES HUELSER of the firm of Huelser & Co., of Temple Chambers,
London, International Patent Agency do hereby declare the nature of this
invention a communication to me from abroad by Friedrich August Meischner of
351 Werder-strasse, Dresden, in the Kingdom of Saxony, Empire of Germany,
Manufacturer, 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 improvements for locking bolts and nuts which consist
in providing those surfaces of the thread of bolt and nut, which receive the
pressure on the tightening of the nut with a suitable number of ratchets or stop
teeth of equal size. At first the teeth of the nut, when the latter is being tightened,
move past the teeth of the bolt without coming into contact therewith. On
further tightening of the nut, the teeth would be clamped fast mutually, which
is however prevented by an elastic intermediate plate. The teeth of the nut
therefore slide, on further tightening of the latter, over and are retained by the
teeth of the bolt.
The limit of the locking is reached when the teeth of the nut completely fill up
the interstices between the teeth of the bolt, and the elastic intermediate plate
cannot be further compressed than the height of the ratchet teeth amounts to.
To unlock the device, either the elastic plate is removed or the nut is pressed
down for the height of the teeth and subsequently turned back.
Referring to the accompanying drawing
Fig. 1 is an elevation of the bolt and nut shewing the ratchet teeth of
the bolt.

page_text: Fig. 2 represents a modification, in which the screw thread of the bolt has
ratchet teeth at the end only, while an ordinary nut is employed, between which
and a ring fitted. with ratchet teeth and serving alone for locking, an elastic
intermediate plate c is provided. This modification is intended to facilitate the
unlocking of the device.
Having now particularly described and ascertained the nature of this
invention and in what manner the same is to be performed, I declare that what
I claim is :
1.) The application, for locking bolts and nuts, of ratchet or stop teeth provided
throughout on those surfaces of the thread of nut and bolt which take up the
pressure on the tightening of the nut, in combination with an elastic intermediate
plate, substantially as set forth.
2.) The application, for locking bolts and nuts, of ratchet or stop teeth provided
at the end of the bolt and within an auxiliary nut or ring on those surfaces of the
thread of bolt and ring, which take up the pressure on the tightening of the
auxiliary nut, in combination with an elastic plate provided between the ordinary
and auxiliary nut, substantially as set forth.
Dated this 16th day of April 1891.
HUELSER & Co.,
Temple Chambers, London, Agents for Applicant.