Improvements in Rotary Outters for Outting Metal.
Year: 1896

page_text: Date of Application, 22nd Apr., 1896--Accepted, 6th June, 1896
COMPLETE SPECIFICATION.
Improvements in Rotary Outters for Outting Metal.
I Sir CHARLES HENRY AUGUSTUS FREDERICK LOCKHART Ross, Baronet, of
Balnagowan Castle, Ross-shire, N.B., do hereby declare the nature of this invention
and in what manner the same is to be performed, to be particularly described and
ascertained in and by the following statement :-
The object of this invention is to provide a circular cutter for use in forming
blanks out of rods for making metal screws and other purposes where a cylindrical
stem and a square shoulder to the head is required.
In the accompanying drawing
Fig. 1 is a perspective view of the improved cution
Fig. 2 is a side view;
Fig. 3 an end view; and
Fig. 4 a longitudinal section.
The instrument consists of a solid steel cylinder A, through the centre of which
a hole B is bored to the size of the blank to be produced. The cutting edges C,
which are radial, are formed in one end of the cylinder in any convenient manner.
So far I believe the form of cutter is not new.
The central hole through the cutter has, however, been of the same diameter
throughout, which acts prejudicially, as it causes friction, and prevents the lubricant
from entering.
According to my invention, I form the central hole of the proper diameter for a
short distance, and I then increase the diameter for the rest of the length of the
cutter in any convenient manner, as clearly indicated in Fig. 4.
To provide for effective lubrication, I form a slot or recess D for any convenient
distance inward from the end of the cylinder, between the periphery and the central
hole on one side, so that the lubricant can pass into the larger diameter, and from
there creep into the shorter & smaller diameter, where it is required.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The circular cutting instrument as herein shown and described, for the purpose
set forth.
2. In a circular cutting instrument of the character described, obviating friction
and providing for lubrication during working, as set forth.
Dated this 22nd day of April 1896.
proved cus
Fig. 2 is a side view;
Fig. 3 an end view; and
Fig. 4 a longitudinal section.
The instrument consists of a solid steel cylinder A, through the centre of which
a hole B is bored to the size of the blank to be produced. The cutting edges C,
which are radial, are formed in one end of the cylinder in any convenient manner.
So far I believe the form of cutter is not new.
The central hole through the cutter has, however, been of the same diameter
throughout, which acts prejudicially, as it causes friction, and prevents the lubricant
from entering.
According to my invention, I form the central hole of the proper diameter for a
short distance, and I then increase the diameter for the rest of the length of the
cutter in any convenient manner, as clearly indicated in Fig. 4.
To provide for effective lubrication, I form a slot or recess D for any convenient
distance inward from the end of the cylinder, between the periphery and the central
hole on one side, so that the lubricant can pass into the larger diameter, and from
there creep into the shorter & smaller diameter, where it is required.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed, I declare that what I
claim is :-
1. The circular cutting instrument as herein shown and described, for the purpose
set forth.
2. In a circular cutting instrument of the character described, obviating friction
and providing for lubrication during working, as set forth.
Dated this 22nd day of April 1896.
NEWTON & SON,
Agents for the Applicant.