IMPROVEMENTS IN SAFETY NUTS FOR Dunne
Year: 1880

page_text: LETTERS PATENT to Henry Anderson, of San Francisco, in the County of San
Francisco and State of California, one of the United States of America,
Gentleman, for an Invention of "IMPROVEMENTS IN SAFETY NUTS FOR
Dunne
PROVISIONAL SPECIFICATION left by the said Henry Anderson at the
Office of the Commissioners of Patents on the 14th September 1880.
HENRY ANDERSON, of San Francisco, in the County of San Francisco and State
of California, one of the United States of America, Gentleman. "IMPROVEMENTS IN
SAFETY NUTS FOR AXLES OF VEHICLES AND FOR OTHER LIKE PURPOSES."
My Invention relates to an improved safety nut or washer chiefly designed for
use with the axles of wheeled vehicles, to prevent the wheels from coming off the
same, and consequently the axle from dropping or falling to the ground, which
dropping or falling of the axle often causes fatal accidents.
In carrying my said Invention into practice, I construct the nut or washer in
two parts, and form a screw thread upon the outer end thereof, over which a screw
cap or head is placed, firmly connecting the two parts of the nut or washer and
holding them in position upon the end of the axle.
This nut is designed for use with an axle whose ends have no screw threads and
are similar to those of the wheel bearing ends of railway axles, that is to say, they
are provided with a collar and a shoulder. My nut or washer is divided as above
mentioned, and the inner corners of one part are bevelled, so that when the parts
are united a channel for the lubricant is formed between the parts of the nut and
the axle at two points above and beneath the journal.
Upon the outer ends of the two parts of the nut I cut the screw thread above
mentioned, which receives the female screw of the aforesaid cap, so that when all
the parts are united, and the cap turned up against the shoulder of the divided nut,
it is in appearance like that of the ordinary nut of a vehicle. I provide a pin or
stud on the nut, which prevents the cap from being screwed beyond its proper
position.
In practice the nut or washer should not be made to fit so closely against the
shoulders of the journal as to prevent the lubricant from entering the bearing parts,
as the nut will move on the journal and collar at intervals, or when hardly pressed
against by the outer end of the hub or nave of the wheel, and more especially will
this take place when the position of the vehicle or axle is inclined.
My Invention is adapted not alone to the axles of vehicles, but may be applied
to shafting and the like having end bearings.

page_text: Figure 3 is an end view of the said screw cap or head and nut or washer.
In carrying my Invention into practice, I employ an axle whoso ends have no
screw threads upon them, and are similar to those of the wheel bearings of railway
axles, that is to say, each end is provided with a collar A and a shoulder B. The
nut or washer C is divided into two parts as above stated, and the internal surfaces
of the said parts are bevelled, as shewn in dotted lines at D, D, Figure 3, so that
when they are united diametrically, opposite channels for the lubricant to enter are
formed between the parts of the nut and the axle at two points. These bevelled
surfaces morcover facilitate the placing of the two parts of the nut or washer in
position upon the axle.
Upon the outer ends of the two parts of the said nut I cut a screw thread E
which receives the female screw of the cap F, so that when all the parts are united,
and the cap is turned into contact with the divided nut, it is in appearance like
that of the ordinary nut of a vehicle. To ensure the faces or sides of the hexagonal
or other shaped screw cap or head F coinciding with those on the two parts of the
nut or washer C, I prefer to arrange upon one of the two parts of the nut a pin
or lug C, which enters a groove or channel F in the said cap, as shewn in Figure 2.
This pin or lug when the cap is screwed upon the screw threaded outer ends of the
nut abuts against the end of the said channel, or against the bottom of the same,
and thus ensures the coincidence of the said faces or sides.
In practice the nut or washer should not be made to fit so closely against the
shoulders of the journal as to prevent the lubricant from entering the bearing parts,
as the nut will move on the journal and collar at intervals, or when hardly pressed
against by the outer end of the hub or nave of the wheel, and more especially
will this take place when the position of the vehicle or axle is inclined.
My Invention may be adapted not only to the axles of vehicles, but may be
applied to shafting and the like.
Having thus fully described my said Invention and the manner of performing
the same, I wish it understood that I claim,-
The combination with the end bearing of an axle, which has a shoulder and
collar, of a nut or washer formed in two parts, screw threaded at their outer end to

page_text: receive a screw cap or head for retaining the said parts in position upon the axle
between the said shoulder and collar, as above set forth and for the purposes
specified.
In witness whereof, I, the said Henry Anderson, have hereunto set my hand
and seal, this Fifteenth day of September, in the year of our Lord One
thousand eight hundred and eighty.
HENRY ANDERSON. (L.S.)