Lathe mounting apparatus

A lathe-mounting apparatus defining a cylindrical core having an enlarged cylindrical termination at one end thereof and a separate slidably-mounted cone at the opposite end. The cone is adapted to slide onto the smaller end of the cylindrical core, the smaller end of the cone preceding the larger end, whereby a brake disk, or other similarly shaped cylindrical article, mounted on the cylindrical core between the enlarged termination and the cone, may be cut or resurfaced without significant vibration during rotation of the article.

FIELD OF THE INVENTION 
This invention relates to an apparatus for mounting articles, such as a 
brake disk, brake rotor or brake drum, on a lathe. 
PRIOR ART 
It is common in the art to mount an article on a lathe by securing it 
between or against one or more cones. A typical form of the prior art has 
two cones, the smaller ends thereof facing together at least one of which 
is slidably mounted on a spindle whereby an article having a hole there 
through may be secured between the two cones. 
Using an apparatus of the prior art, a significant problem associated with 
cutting or refinishing the article mounted on the spindle arises from 
vibration created during rotation of the article while the cutting force 
is simultaneously exerted. Such vibration creates undesirable 
imperfections in the refinished surface. Notwithstanding many years of 
research and numerous improvements in screw machines, lathes and the like, 
the problem with vibration during operation has not been eliminated. 
SUMMARY OF THE INVENTION 
An important feature of my invention involves replacement of one of the 
cones with an alternative member described below, to which I will refer to 
a roto-hub. An article secured between the roto-hub and a slidably mounted 
cone may be cut or refinished while being rotated on a lathe spindle while 
experiencing a significant reduction of the vibration normally created by 
such operation. The resulting cut or refinished surface, therefore, 
contains fewer imperfections thereby reducing the time and cost required 
to smooth the surface. 
My invention is comprised essentially of a roto-hub, defined as a hollow 
cylindrical core having an enlarged cylindrical termination at one end 
thereof, said termination defining a hollow cylindrical recess concentric 
with the core and the termination, the hollow of the core being adapted 
for mounting on a lathe spindle; a hollow conical member, or cone, having 
a small end and a large end, slidably and matingly engaging the core with 
the small end thereof received within the hollow of the termination, 
whereby an article can be adjustably mounted between the termination and 
the conical member. 
It will be obvious to those skilled in the art that the particular 
dimension of the roto-hub and cone may be infinitely varied without 
altering the unique concept of my invention. 
In the preferred form of my invention, chamfer has been added to the inner 
and outer edges of each end of the cylindrical core to promote ease of 
mounting of both the lathe mounting apparatus onto the spindle and an 
article onto the lathe mounting apparatus, and for more perfect centering 
of rotor or drum articles. 
The smaller end of the core opposite the roto-hub also has a first 
concentric groove extending from the termination of the smaller end to a 
distance almost half the length of the core. The first groove further 
improves the ease of mounting of an article onto the lathe mounting 
apparatus. 
Another feature of the preferred form of my invention is a second 
concentric groove in the outer surface of the cylindrical core at the 
point of connection between the enlarged cylindrical termination and the 
cylindrical core.

DESCRIPTION OF THE PREFERRED FORM OF INVENTION 
Referring now to FIG. 2, the hollow cylindrical core of my lathe mounting 
apparatus is designated by numeral 1 and the cylindrical hollow of the 
core is designated by numeral 7. A concentric groove 9 is cut into the 
outer surface of the core 1 at the point of connection with an enlarged 
cylindrical termination 3, the termination 3 having a hollow cylindrical 
recess 5 concentric with the core 1 and the termination 3. The smaller 
termination 21 of the core 1 also has a concentric groove 19 extending 
from the smaller termination 21 to a concentric chamfer 17 located near 
the middle of the core 1. A concentric chamfer 15 appears at the smaller 
termination 21 of the hollow of the core 7, and a concentric chamfer 13 
appears at the enlarged cylindrical termination 3 of the hollow of the 
core 7. 
A concentric chamfer 11 also appears at the smaller termination 21 on the 
outer surface of the core 1. 
It will be clear to those skilled in the art that the chamfer 13 and 
chamfer 15 will improve the ease of mounting the apparatus onto a lathe 
spindle, while the chamfer 11 and chamfer 17 will assist the user in 
sliding a properly adapted conical member onto the smaller end 21 of the 
cylindrical core 1. 
FIG. 1 shows the same elements from a longitudinal view of the enlarged 
cylindrical termination, as those described above in FIG. 2. FIG. 2 
clearly shows the cylindrical configuration of the preferred form of my 
invention. 
Referring now to FIG. 3, the hollow conical member 31 defines a cylindrical 
hollow 43 extending there through from the smaller end 33 to the larger 
end 35. The concentric chamfer 39 appears at the larger end 35 of the 
hollow 43 of the cone, and a similar chamfer 41 appears at the smaller end 
33 of the hollow 43 of the cone. It is obvious to those skilled in the art 
that chamfer of this nature will significantly improve the ease with which 
the cone may be slidably mounted onto the smaller termination of the core. 
A third chamfer 37 appears at the larger end 35 on the outer surface of 
the cone 31. 
FIG. 4 depicts a cylindrical disk 51 having a cylindrical hollow 57 
extending there through from a flat rear surface 53 to a flat front 
surface 55, the disk being mounted on a roto-hub and being supported on 
the rear surface 53 by the enlarged cylindrical termination 3. The 
cylindrical core 1 extends through the hollow 57 of the disk 51. A conical 
member 31 is slidably mounted onto the core 1 and is secured against the 
disk 51, the smaller end 33 of the core 31 extending through the hollow 57 
of the disk 51 beyond the rear surface 53 and into the recess 5 of the 
enlarged cylindrical termination 3. The roto-hub and disk 51 may then be 
rotated together about the longitudinal axis of the cylindrical core 1, 
the disk 51 being held firmly in place by the force of the enlarged 
cylindrical termination 3 against the rear surface 53 and the force of the 
conical member 31 against the surface of the hollow 57 of the disk 51. 
Based on the above, I believe that my invention will be clearly understood.