Improvements relating to Feed Mechanism for Presses and other Metal-working Machines.
Year: 1898

page_text: Date of Application, 30th Sept., 1898
Complete Specification Left, 13th June, 1899 -Accepted, 23rd Sept., 1899
Improvements relating to Feed Mechanism for Presses and other
Metal-working Machines.
I, CHARLES RILEY GARRARD, of 107, Ryland Street, in the City of Birmingham,
Engineer, do hereby declare the nature of this invention to be as follows:
This invention consists of improvements relating to dial feed mechanism for
presses and other machines, my object being to so arrange and operate such
mechanism that in the event of any breakage, slip, or accident impairing the
correct movement and locking of the dial, no movement of the punch or other
like tool will occur and thus any damage to such tool or to the dial and its
mechanism will be prevented.
My invention comprises the driving or operation of the dial indexing, dividing,
actuating, and locking mechanism by a belt or other means from the loose wheel
usually employed on presses, or from a counter-shaft, such wheel being auto-
matically thrown into gear with the main or crank shaft of the press only when the
dial is locked in the correct positions, and released or disconnected on the com-
pletion of each stroke of the machine.
In the application of my invention to the dial feed of a press or machine for
the drifting of the blocks of cycle and like chains, I arrange the dial plate
beneath the crank shaft but instead of driving or operating the feed mechanism
positively by the crank shaft of the machine in the ordinary manner, I operate
it from an independent belt.driven or other wheel or pulley fixed to a counter
shaft beneath the crank shaft of the machine. Such shaft is provided at one
end with a crank for effecting the reciprocation of a slide which operates the
dial indexing, dividing, actuating, and locking devices, and also, a lever or
levers by which the loose belt or other pulley or wheel on the crank shaft is
thrown into gear or connection with the shaft on which it is mounted and thus
the drifting tool is reciprocated. But such movement of the drifting tool cannot
occur until after the dial has been fixed in the correct position with a chain
block in direct alignment with the drifting tool, as the reciprocating slide can
only throw the clutch into gear after the locking of the dial in position by the
engagement of the pawl like lever with the peripheral notches of the dial plate,
as the pawl forms the necessary abutment for the clutch operating lever or levers.
On the return stroke of the slide the crank shaft is disconnected from its
loosely mounted driving wheel or pulley.
Dated L: DOLL
1
1000

page_text: Improvements relating to Feed Mechanism for Presses and other
Metal-working Machines.
I, CHARLES RILEY GARRARD, of 107, Ryland Street, in the City of Birmingham,
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:-
This invention consists of improvements relating to dial and similar feed
mechanism for presses and other metal working machines, my object being to
so arrange and operate such mechanism that in the event of any breakage,
slip, or accident impairing the correct movement and locking of the dial, no
movement of the punch or other like tool will occur, and thus any damage to
such tool or to the dial and its mechanism will be prevented.
My invention comprises the driving or operation of the dial actuating and
locking mechanism by a belt or other means from the loose wheel usually
employed on presses or like machines, or from a counter shaft, such wheel being
automatically thrown into gear with the main or crank shaft of the press only
when the dial is locked in the correct positions, and released or disconnected from
such shaft after each operation of the punching or other tools.
In the four accompanying sheets of explanatory drawings to be hercinafter
referred to.
Figure 1 is a front elevation and Figure 2 a side elevation representing the.
application of my invention to the dial feed of a press or like machine for the
drifting of the blocks or link connecting pieces of cycle and other driving chains,
and for other purposes.
Figure 3 is a side elevation and Figure 4 a plan with part in section showing,
to a larger scale, the construction and arrangement of parts forming the dial
feed mechanism.
Figure 5 is an elevation and Figure 6 a plan of the slide of the dial feed
mechanism.
The
The same reference letters in the different views indicate the same parts.
I arrange the dial plate A beneath the crank shaft B, but instead of driving
or operating the feed mechanism positively by the said crank shaft in the
ordinary manner, I operate it from an independent wheel or pulley C fixed to
a counter shaft D and driven preferably by means of a belt from the boss E¹
of the main wheel or pulley E mounted loosely on the crank shaft B.
shaft D is provided at one end with a crank F for effecting the reciprocation of
a slide G to which is pivotted the spring pawl H for actuating the dial on the
movement of the slide in the direction indicated by the arrow at Figure 4. On
the return movement of the slide, or the movement in the direction opposite to
that indicated by the arrow, the projection g from the upper part of the slide G
presses against the pivotted abutment piece j and raises the triangularly shaped
lever J, pivotted at J, and connected by a rod K with any suitable clutch device
by which the driving wheel E can be automatically connected with and discon-
nected from the crank shaft B on which it is loosely mounted. On the movement
of the slide & in the direction indicated by the arrow, the abutment piece j
pivotted to the lever Jis tripped by the projection from the slide.
The elevation of the lever J by the action of the slide G in the manner
described, so actuates the clutch as to put the driving wheel E into connection
with the crank shaft B which then reciprocates the drifting punches or tools
attached to the ordinary sliding block L. Before the completion of the return

page_text: one of the
stroke of the slide G its laterally projecting pin or lug gl strikes the dial
locking pawl or catch M and withdraws it from contact with the notched perimeter
of the dial or dial plate, in order that on the next instroke of the slide the dial
may be revolved through the required distance by the action of the pawl H.
But if from slipping, breakage, or other accident the dial is not carried
through the required distance at each movement the locking pawl M,
which is fitted with a suitable spring, will not engage with
slots or notches in the dial but will simply bear against the perimeter, and its
left hand edge m will remain projected over the lower end of the clutch operating
lever J, as indicated by dotted lines at Figure 4. The rod K is suitably notched
or gapped to allow the pawl M to project over to the dotted line position. With
the locking pawl in such a position the clutch operating lever cannot be elevated
to put the crank shaft B in connection with the driving wheel E, neither can
the slide G return, as the edge m of the pawl forms an abutment preventing
such elevation and return movement respectively; the driving belt will there-
fore slip and produce no movement of the pulley C.
The shaft B and driving wheel E are normally disconnected owing to the
weight of the lever J and rod K acting upon the clutch, and they remain discon-
nected until the lever is forcibly elevated in the manner described.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed, I declare that what
I claim is:-
1. In presses and other metal-working machines, automatically controlling
the movement of the tools by the operation of the feed mechanism, substantially
as described.
2. In the dial feed mechanism of presses and other metal-working machines,
the combination with a reciprocating slide carrying a dial actuating device,
of a locking catch and a clutch operating device, substantially as and for the
purposes described and as illustrated.
3. A press or other metal-working machine having its feed mechanism driven
independently of its tool operating mechanism, but with an automatically con-
trolled clutch connection between the two, substantially as described and as
illustrated.
MARKS & CLERK,
18, Southampton Buildings, London, W.C., and
13, Temple Street, Birmingham, and
25, Cross Street, Manchester, Agents for the Applicant