Improvements in the Means for Holding Work in Metal Working Machines with Reciprocating Tables or Beds.
Year: 1896

page_text: Date of Application, 21st Jan., 1896
Complete Specification Left, 15th July, 1896-Accepted, 12th Sept., 1896
PROVISIONAL SPECIFICATION.
Improvements in the Means for Holding Work in Metal Working
Machines with Reciprocating Tables or Beds.
I, JAMES WILLIAM CLARIDGE 79 Gracechurch Street London, E.C. Engineer
do hereby declare the nature of this invention to be as follows:-
This invention relates to holding gear for machines with tables or beds which
receive motion from a screw shaft running along the length of the beds of such
machines and in such a way that while the table is carried alternately backwards
and forwards the work upon it is made to travel in one direction only and operated
upon as may be desired.
For this purpose holders are cast solid with the table and in these holders are
fitted dies shaped or otherwise gripped to the work. One or both of the holders
is made so that a lever pivoted to it has one arm resting on the die and the other
arm connected to the main block which gives motion to the machine table from
the driving screw. This main block fits in the body of the machine table or bed
so that at the beginning and end of a stroke its action is to tighten the pivoted
arm to or release it from its grip on the work automatically and at any given
point of the stroke. The length of travel of the machine may be altered to any
extent possible and the machine be made to do work in one direction instead of in
the other.
Dated this 20th day of January 1896.
JAMES WILLIAM CLARIDGE.
Improvements in the Means for Holding Work in Metal Working
Machines with Reciprocating Tables or Beds.
1, JAMES WILLIAM CLARIDGE of 79 Gracechurch Street London E.C.
Engineer 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 and accompanying sheet of drawings:-
This invention relates to holding gear for machines with tables or beds which
receive motion from a screw shaft running along the length of the beds of such
machines and in such a way that while the table is carried alternately backwards
and forwards, the work upon it is made to travel in one direction only and operated
on as may be desired.
For this purpose holders are cast solid with the table and in these holders are
fitted dies suitably shaped to the work; one or both of the holders is made so
that a lever pivoted to it has one arm resting on the die and the other arm
connected to the main block which gives motion to the machine table from the
driving screw. This main block fits in the body of the machine table or bed so
that at the beginning aud end of a stroke its action is to tighten the pivoted arm
to or release it from its grip on the work automatically. The length of travel of
the machine may be altered to any extent possible and the machine be made to do
work in one direction instead of the other.

page_text: The particular object of this invention is for holding work in machines with
reciprocating tables so that the work travels in one direction only and generally
facilitates the speed at which such work can be done and enables the work to be
placed in and taken out more readily. For this purpose the dies on the sliding
bed are shaped to suit the work to be carried; one or both of these dies is
connected to a lever which is pivoted so that while one eud is attached to a block
on the main screw of the machine the other actuates the reversing bar of the
machine. The block on the main screw before mentioned has a travel of itself
independent of the body of the machine and this travel has the effect of tightening
or releasing the grip of the dies on the work before the machine body itself comes
into operation and when required at the extreme end of the stroke. As the other
arm of the pivoted lever works the reversing bar of the machine, by altering the
position of the trip gear on this bar the length of travel may be altered, at the
same time the pivoted lever may be set the other way if motion of the work is
required in a contrary direction.
In the accompanying drawing Figure 1 exhibits a side view of my improved
arrangement for holding work in metal working machines. Figure 2 is an end
view and Figure 3 a plan of same, wherein A is the main sliding bed of the
machine carrying holders or grips B, B, shaped to the work. C, C, is the main
block worked by the screw D; this block fits loose in the body as shewn and to
the block is attached the lever E, pivoted at F; the arm G, actuating reverse
bar H, and that shewn as the grip lever I tightening or loosening the block K
on B the die, with adjustment by the bolts M, M. The action of the machine is
therefore for the main block C, C, to move in the groove shewn and tighten the
block K on to the work, then when the main body of the machine follows and with
it the work carried by the dies B, B, the arm G, comes into play and reverses the
direction of the machine; the block C, C, moves in the opposite way and loosens
the grip K, until a fresh grip is taken and so on. The positions of the studs L, L
as shewn may be altered and the arrangement reversed so that the machine acts
backwardly in carrying the work.
Having now particularly described and ascertained the nature of my said inven-
tion and in what mauner the same is to be performed, I declare that what I
claim is :-
1. The employment of holding gear for work in reciprocating machines so that
the work travels only one way and the travel of the machine itself tightens or
releases the dies from the work.
2. The employment of a block attached to the main screw of reciprocating
machines of the kind described which has a supplementary travel before causing
the main body of the machine itself to move.
3. The employment of the pivoted lever as described so that while one end is
connected to the motion block on the main screw the other actuates the reversing
bar of the machine.
4. In machines of the kind described wherein the employment of trip gear on
the reversing bar may be altered in position on such bar to give a different length
of travel on the machine bed from the motion block direct.
5. The general disposition of the parts of machines with reciprocating tables as
and for the purposes herein described and set forth.
Dated this 15th day of July 1896
JAMES WILLIAM CLARIDGE.