AN IMPROVED BOLT AND NUT LOCK, AND IN MACHINERY TO BE EMPLOYED FOR THE MANU- FACTURE THEREOF.
Year: 1874

page_text: LETTERS PATENT to Alexander Browne, of the Firm of Browne and
Company, Patent Agents, of 5, Southampton Buildings, Holborn,
in the County of Middlesex, for the Invention of "AN IMPROVED
BOLT AND NUT LOCK, AND IN MACHINERY TO BE EMPLOYED FOR THE MANU-
FACTURE THEREOF. ."-A communication from abroad by Isaac Dickinson
Guyer, of New York City, in the County and State of New York,
United States of America.
ealed the 12th February 1875, and dated the 13th August 1874.
COMPLETE SPECIFICATION filed by the said Alexander Browne at the
Office of the Commissioners of Patents, with his Petition and
Declaration, on the 13th August 1874, pursuant to the 9th Section
of the Patent Law Amendment Act, 1852.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, ALEXANDER
BROWNE, of the Firm of Browne and Company, Patent Agents, of 5,
Southampton Buildings, Holborn, in the County of Middlesex, send
greeting.
WHEREAS I am in possession of an Invention for "AN IMPROVED
BOLT AND NUT LOCK, AND IN MACHINERY TO BE EMPLOYED FOR THE MANUFACTURE
THEREOF," and have petitioned Her Majesty to grant unto me, my
executors, administrators, and assigns, Her Royal Letters Patent for
.

page_text: the same, and have made solemn Declaration that it has been com-
municated to me from abroad by Isaac Dickinson Guyer, of New
York City, in the County and State of New York, United States of
America.
NOW KNOW YE, that I, the said Alexander Browne, do hereby 5
declare that the following Complete Specification, under my hand and
seal, fully describes and ascertains the nature of the said Invention, and
in what manner the same is to be peformed, in and by the following
statement:-
This Invention has for its object a novel machine for forming grooves 1
or seats in bolts for the reception of keys or anchors which are employed
for locking the nuts applied to the bolts.
The Invention consists in the employment of a slotting tool which
operates in connection with a pair of holding dies for forming in a rod
of metal, a seat, or groove for the reception of a nut-locking anchor, the 1
said slotting tool being of any desired shape and arranged to operate
through a slot in one of the holding dies, so as to form a slotted groove
by compression of the metal.
The Invention further consists in a bolt constructed with a slot and a
cavity for the reception of an anchor for keeping the nut in its place on 2
the bolt, as hereafter described.
In the accompanying Drawings Figure 1 is a plan or top view of a
machine for slotting bolts or as much as is necessary to illustrate this
Invention; Figure 2 is a cross section taken on the line x, x, of
Figure 1.
Figure 3 is a detail view of a bolt with a slot or seat for the reception
of a key or anchor.
Figure 4 represents the said key or anchor.
Figure 5 is a detail view of the slotting tool with its rear portion
broken away.
Figure 6 is a sectional view of a bolt nut and washer with the improved
anchor nut lock applied thereto; Figure 7 is a sectional view through
the line x, x, of Figure 6.
Figure 8 is a top view of a bolt nut and washer with the lock
attachment.
Figure 9 is a similar view with the anchor locked and clinched.
2

page_text: In the Drawings A designates the base frame or platform of the
machine for slotting bolts, which is preferably located in juxtaposition
to the bolt heading and cutting-off machine, so as to enable the seats or
slots in the bolt to be formed simultaneously with or shortly after the
heading operation. The blank or rod B from which the bolts are to be
cut which may designate a cut-off bolt is passed between a pair of
dies C, D, the adjacent faces or ends of which are made with semi-
cylindrical seats so as to firmly hold the bolt or blank while it is being
subjected to the action of the slotting tool E. The said tool is of any
desired form or size, but generally it is provided with a projecting head
which is designed to form in the bolt a groove or slot denominated an
"anchor seat." The slotting tool is arranged to operate through a slot
formed in the die D, and is adapted to be operated by any suitable
mechanism connected with its carrier block F, which in the present
instance it is not deemed necessary to designate specifically. By forcing
the slotting tool against the blank or bolt held between the dies, the
metal of the bolt is displaced or compressed in such a manner that a slot
or groove is formed, the size and shape of which is determined by the
shape of the cutting tool. One or both of the dies for holding the bolt
while being slotted is made movable, so as to enable the same to be
readily released upon the termination of the slotting operation. After
the bolt has been headed and slotted as above referred to, the screw head
is formed on the same in the ordinary manner, and in order to retain
the key or anchor (shown in Figure 4) in position I propose in certain
instances to perform the screw-cutting operation with the said key or
anchor inserted into the seat or slot in the bolt, so as to cause the screw
threads to project slightly over the key for the object stated. By this
Invention the slot or key seat in the bolt is formed in a perfect manner,
as the motion of the slotting tool is positive and not uncertain as with a
hammer, and furthermore the slotting operation can be performed with
greater celerity and precision than with a planing or milling machine,
and the metal of the bolt is compressed more perfectly than by a hammer
which spreads it somewhat, and the end of the bolt which is to receive
the thread for the nut is stronger than before the slot was made.
In Figures 6, 7, 8, and 9 is illustrated the improved bolt and anchor

page_text: groove, cut, pressed, or stamped in upon that part of the bolt where the
thread is cut, and having the enlarged cavity T either made deeper or
wider than the slot C at the end thereof nearest to the head of the
bolt.
Instead of making the slot C parallel to the length of the bolt, it may
be made either in a spiral form or of an irregular zig-zag shape, to
answer the purpose of anchoring the piece or bar O (which is then made
to conform thereto) without having the head T; O is an anchor or
clamp made of compound metal, say of zinc, tin, and copper, or other
suitable metal or metals. This anchor O is placed in the slot O so as to
fill it and be hooked or anchored in the cavity T, and the nut B may be
screwed over it freely. When the nut is screwed home the end of the
anchor which projects out of the nut is turned or jammed up against the
same, as shown in Figures 7 and 9, thus preventing the receding of the
nut on the bolt.
In order to take up any slack which may arise from wear of surfaces
in railroad work, I sometimes employ in connection with the anchor a
spring washer F which is seen at rest in Figure 6, and straightened in
Figure 7.
This improved nut lock is specially designed for use on railroad trucks,
cars, and wheeled vehicles, and on machinery where the jarring or
rubbing movement tends to loosen and shake off or slacken the nuts of
bolts, it being found absolutely impossible to tighten nuts to bearings
by the simple bolt and nut in position subject to frequent jarring as to
entirely prevent slack by rubbing or to meet the exigencies of climatic
construction.
Having now described and set forth the nature and object of this
Invention for "An Improved Bolt and Nut Lock, and in Machinery to
be employed for the Manufacture thereof," I would remark in conclusion
that I hereby declare this Invention to consist in, and I claim,—
First. The use of a tool of any form operated through a slot in a die
by which the rod of metal to be formed into a bolt is held upon the said
rod by pressure to form the slot in the bolt.
Second. The use in combination of a tool E and dies C, D, or their
equivalents for forming a slot in a bolt or bar of metal.
Third. The combination of the tool E, dies C, D, with any proper
bolt heading machine for the purpose of forming a slot in a rod of metal

page_text: at the same time the process of heading is being performed, or nearly
simultaneously with it, so that the entire operation of heading and
slotting is done by one introduction of the rod of metal.
Fourth. The combination of a bolt A having the slot C and enlarged
cavity T with the anchor O, substantially as described for the object
specified.
Fifth. The bolt A having the slot C and cavity T, as and for the
purpose specified.
In witness whereof, I, the said Alexander Browne, have here-
unto set my hand and seal, this Eleventh day of August, in
the year of our Lord One thousand eight hundred and seventy-
four.