Certain Improvements to Ambrose Shardlow's File Outting Machines.
Year: 1893

page_text: COMPLETE SPECIFICATION.
Certain Improvements to Ambrose Shardlow's File Outting
Machines.
I, WILLIAM HANDLEY of Victoria Road Leeds in the County of York File
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 :-
My present invention relates to certain improvements in Ambrose Shardlow's file
cutting machines. In this machine hitherto-after the file blank has been placed
in required position upon the sliding bed, and when the ram or slide has caused the
tool to make the necessary amount of cuts-it has been necessary for the operator
to stop the machine by moving the belt motion by hand, and in so doing it is found
very difficult to stop the machine at the required time, so that each file may have
equal amount of cuts, and finished off alike. My present invention therefore has
for its object means for throwing the driving belt on to the loose pulley automatically
Bo dispensing with the necessity of the operator performing the same by hand, and
ensuring each file to receive equal amount of cuts; to attain which I employ the
mechanism as illustrated in the accompanying sheet of drawings in which
Fig. 1 is a side elevation of the standard and sliding bed of an Ambrose Shardlows
file cutting machine with my improvements applied thereto, and
Fig. 2 is an end view of said machine machine with my improvements.
Fig. 3 is an elevation of a modification of my said improvements.
Similar letters of reference denote corresponding parts in each view.
Referring to Figs. 1 and 2, I employ a lever A which moves upon a pin a¹ fixed
to the standard S, and the upper end of said lever A is formed a slot in which a
pin a works, the said pin a being fixed to the belt fork slide C. Another lever B
works upon a pin or stud 61 which latter is also fixed to the standard S, and the
upper end of the said lever B comes in contact with the lower end of the lever A.
The lower end of the lever B is preferably formed so as to receive a suitable
runner which bears against a bar D. The said bar D is fastened by means of
set screws to the side of the sliding bed E and is formed with a slot e¹ so that its
position can be adjusted and it is formed with a projection eso situated that when
the same comes in contact with the runner 6', and the lever B is moved so as to
cause the lever A to move the belt fork bar C, and throw thereby the driving
strap g, on to the loose pulley p and so stop the machine. Referring to Fig. 3
I dispense with the lever B and employ one long lever A which works upon a pin a',
which in this case is at the lower end of said lever A, and this lever A receives a
runner 6 as shown and when the projection e³ comes in contact with the same it
will be obvious that it will move the belt fork bar C so as to throw the driving
strap g on to the loose pulley p, and so stop the machine.
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 combination of levers A and B with a bar D, and projection e' fitted upon
a Shardlow's file cutting machine, and operating in the manner substantially as
described and illustrated at Figs. 1 and 2 of the accompanying drawings and for
the purpose specified.
2. The combination of a lever A with a projection fitted upon a Shardlow's

page_text: file cutting machine and operating in the manner substantially as described and
illustrated at Fig. 3 and used for the purpose specified.
Dated this 27th dox of February 1803
H. F. BOUGHTON, M.I. Mech. E.,
Sheffield, Agent.