IMPROVEMENTS IN PRESSES OR LIKE MACHINERY
Year: 1884

page_text: We, ERNST AUGUST JAHNCKE, Canonbury Works, Dorset Street, Essex Road,
Islington, Manufacturer, and HENRY WILLIAM HERBST, 16 Norfolk Road, Essex
Road, Islington, Engineer; both in the County of Middlesex do hereby declare
the nature of our Invention for IMPROVEMENTS IN PRESSES OR LIKE MACHINERY
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 our Invention is to gain two or more actions at given times from
the revolution of a single screw applicable to presses or like machinery in the
manner as hereinafter described and illustrated in the accompanying Drawing by
preference as a cutting and drawing-up press. We provide such press or machine
with two plates as shown in the accompanying Drawing an upper plate B and a
lower one C and connect the same together by two or more rods D and D1 passing
through a guide E secured to the frame of such press or machine. In the upper
plate is fitted an adjustable tapped collar or bush or nut G to apply the pressure
at the given time. Through this collar or bush or nut which is tapped works a
double acting screw A as hereinafter described. The lower plate C to which is
attached the male cutter H is formed with an opening through which works a
punch I which is connected to a reciprocating plunger K. Below this lower plate
and male cutter are the cutting die L and the draw-plate M which are secured
together on to the bed of the press. The plunger passes through the guide
aforesaid and at its upper end is connected by the screwed bush N to the lower
part a of the screw A which is contracted to correspond in diameter with the
bottom of the thread of the screw and thus forms a shoulder. This screw A which
is in combination with the plates, plunger and punch above described is a double
acting one and is by preference a three threaded screw; it is worked by a fly or
other suitable means. On its being revolved it descends and causes the upper
plate B and lower plate C and the male cutter H and plunger K and punch I to
descend. During this descending motion the contracted part al of the screw A
revolves in the said collar or bush or nut G in the upper plate until the male cutter
comes against the metal to be operated upon now receiving the required pressure
by means of the shoulder or faced part b of the threads of the screw A acting on
the faces c of the tapped threads of the collar or bush or nut G in the upper plate
in the manner as shown by Fig. 6 to cut the required blank and the screw
descending further its screw threaded portion above the shoulder or faced part of
the thread passes into the tapped collar or bush or nut in the upper plate as shown

page_text: in section. Fig. 3 G and exerts pressure therein and while bolding the same in
position imparts a corresponding pressure to and keeps the lower plate and cutter
firmly on to the aforesaid blank to prevent the same forming into wrinkles or
creases during the drawing operation as shown in Fig. 3 and by continuing the
revolution of the screw it travels in the tapped collar or bush or nut G in the
upper plate B at the same pitch as in the nut of the frame of the press or like
machine; the plunger and punch are hereby caused to continue their descent and
the punch passing through the lower plate and cutter comes against the metal
blank and draws the same into the required shape which had been previously
determined by the configuration of the draw plate employed. The rods which
connect the upper and lower plates are screwed in the same at their upper ends
with a left handed thread and at their lower ends with a right handed thread by
which is regulated the pressure required on to the lower plate and cutter. A back
nut is applied to either end of these rods. The adjusting of the tapped collar or
bush or nut G which is round in the upper plate is effected by turning the same
into the required position and it is retained therein by a set screw or other suitable
means. Instead of a tapped collar or bush or nut being fitted in the upper plate
the upper plate itself may be tapped.
Fig. 1 is a side elevation of a press with the arrangement.
Fig. 2 is a section thereof.
Fig. 3 is a section of the arrangement in the position when drawing up. The
thick black line under the punch in Fig. 3 represents a blank under operation.
Fig. 4 is a plan of the upper plate and tapped collar or bush or nut.
Fig. 5 is a section thereof.
Fig. 6 is the lower part of the screw with the tapped collar or bush or nut G on
the same sectioned in such a manner as shown by dotted lines e in Fig. 7 showing
the respective positions of the face b of the thread of the screw and the face c of
the thread of the tapped collar or bush or nut when pressure is applied.
Fig. 7 is a plan showing how the tapped collar or bush or nut is sectioned in
Fig. 6.
The same letters apply to the same objects in the different Figures.
Having now particularly described and ascertained the nature of our said
Invention and in what manner the same is to be performed, we declare that what
we claim is:-
The application of a plate or plates provided with a tapped collar or bush or nut
or tapped plate or plates in combination with a screw substantially in the manner
as herein before described and shown in section Fig. 2. B. G. Section Fig. 3. B. G.
Plan Fig. 4 and section Fig. 5 in the accompanying Drawing to gain two or more
actions from the revolution of a screw.