Improvements in and Connected with the Manufacture of Steel Projectiles.
Year: 1888

page_text: Date of Application, 18th Dec., 1888
Complete Specification Left, 17th Oct.. 1889-Accepted, 23rd Nov., 1889
PROVISIONAL SPECIFICATION.
Improvements in and Connected with the Manufacture of Steel
Projectiles.
I ROBERT ABBOTT HADFIELD of Sheffield in the County of York Steel Manufacturer,
do hereby declare the nature of this invention to be as follows:-
The object of this invention is to greatly facilitate the operation of cutting off the
heads or runners of hollow steel and other steel shells.
This I effect by cutting off the head or runner of a hollow steel or other steel shell
with what is technically termed a "hot saw" i.e. while the shell is hot. The sawing
machine employed is furnished with a suitable sliding bed so that the shell can travel
to and fro as required during the operation. Suitable gearing is also provided for
rotating the shell operated upon at any desired speed.
Dated this 18th day of December 1888.
ELT & Co.,
33, Southampton Buildings, Holborn, London, Agents for the Applicant.
COMPLETE SPECIFICATION.
Improvements in and Connected with the Manufacture of Steel
Projectiles.
I, ROBERT ABBOTT HADFIELD of Sheffield in the County of York Steel Manufacturer
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 greatly facilitate the operation of cutting off the
heads or runners of hollow steel and other steel shells.
This I effect by cutting off the head or runner of a steel shell with what is techni-
cally termed a hot saw while the shell is being rotated-For this purpose I construct
a machine which is illustrated in the accompanying drawings Fig. 1 being a plan-
and Fig. 2 an end elevation thereof-The letters of reference occurring in the following
description refer to corresponding letters in the drawings-Such machine consists of
a base plate A whereon two pedestals B are mounted. These pedestals carry a
shaft C whereon fast and loose pulleys D, E, are fitted which are driven from a counter
shaft or in any other convenient manner-A circular saw F fitted with a suitable
guard G is bolted or otherwise fastened to one end of the shaft C-H is a square
shaft having a cast iron disc h keyed on its outer end-This disc is furnished with
pockets to allow of a bar being fitted therein to turn the same when required-
LM are sliding bearings which carry the shell K-The dimensions of these bearings
vary according to the size of the shell-Such sliding bearings are actuated by levers N
fitted to the shaft H by means of which the shell is brought into contact with the
saw F-The shell is gripped by tongs P fitted to a sliding block Q which has a parallel
movement with the sliding bearings L M and is actuated by a lever S fitted to the
shaft H-In order to rotate the shell while being sawn a worm wheel T (Fig. 2) is
fitted on the outer end of the gripping tongs and is driven by a worm U on a square
spindle V which is carried by the sliding block Q-A friction disc is keyed to the
other end of the spindle V and is driven by a friction ring W mounted on a spindle ✗
which is carried in bearings Y-Motion is imparted to the spindle X by means of
bevel gearing R-In order to keep the friction disc v in gear with the friction ring W
one end of the spindle V is fitted to a lever Z pivotted on a bracket Z' and counter-
balanced by a weight Z' attached to one end of the lever.

page_text: I would here observe that I do not confine myself to the precise details of
construction herein before described as the same admit of modification without
departing from the essential feature of my invention which is the combination of a
hot saw with a rotatory movement of the shell while being operated upon.
Having now particularly described and ascertained the nature of my said inven-
tion and in what manner the same is to be performed I declare that what I
claim is
1. The machine for cutting off the heads or runners of steel projectiles constructed
arranged combined and fitted all substantially in the manner hereinbefore described
and shewn.
2. Rotating the shell while being operated on substantially in the manner herein-
before described and shewn.
3. The improved method of cutting off the heads or runners of steel projectiles all
substantially as hereinbefore described and shewn.
Dated this 17th day of Natahon 1000
ELT & Co.,
33, Southampton Buildings, Holborn, London, Agents for the Applicant.