Improvements in Screw Presses.
Year: 1892

page_text: Date of Application, 26th May, 1892
Complete Specification Left, 4th June, 1892-Accepted. 3rd Dec. 1892
VIDIVAAD DIEUIFICATION.
Improvements in Screw Presses.
We. JOHANN KARL JACOBI of Hollerich, near Luxemburgh, in the Grand
Dukedom of Luxemburgh, and the WEILERBACHER HÜTTE, of Weilerbach, near
Echternacherbrück, Prussia, do hereby declare the nature of this invention to be as
follows:-
In spindle presses it is of importance that the mechanism employed for rotating
the spindle-nut or box should be such that different degrees of pressure can be
exerted as desired to suit requirement.
In the modern constructions the spindle-nut is rotated by means of pawls, which
construction has, however, the inconvenience that the nut (owing to the action of
the pawls) is exposed to considerable wear, so that the mechanism must be repaired
after a comparatively short time, and the several parts must consequently be made
of considerable thickness to enable this to be done.
The object of this invention is to obviate these inconveniences, for which purpose
the spindle-nut is rotated by means of friction pawl gearing comprising either a
friction wheel keyed upon the spindle-nut and a friction tappet pivoted to the main
lever, or two friction jaws fixed rigidly to said main lever.
By either of these arrangements it is possible to exert a great pressure, and the
friction tappet or the friction jaws as the case may be are adjusted automatically
to an extent corresponding to the amount of wear which has taken place.
In the accompanying drawing
Fig. 1 is a plan of friction pawl gearing with reversible friction tappet and by
means of which two degrees of force can be exerted.
Fig. 2 is a side view thereof and
Fig. 3 is a vertical section taken through the axis of the screw spindle.
Fig. 4 represents a modification of the pawl mechanism.
Fig. 5 is a plan of a modification with two friction jaws connected rigidly to the
lever.
Fig. 6 is a vertical section thereof taken through the axis of the spindle; and
Fig. 7 is a rear view of the same the two friction jaws being shown in section.
Figs. 8 and 9 are detail views.
The actuating mechanism is arranged upon the base-plate a, which is formed by
two T-irons or beams connected to each other, and which is connected to the
flange c of the nut d by means of hooks b. e is a socket-bearing for the nut d.
Upon the nut is keyed a friction wheel 7, which has a wedge-like circumferential
groovey with inclined straight faces hh', but it is obvious that these faces may also
be curved. With the friction wheel there engages a friction tappet i, which is
formed with recesses kk, in such a manner that it acts on the faces and also
on the faces of the friction wheel.
i
In order to effect a good contact between the friction faces of the tappet i and
those of the friction wheel notwithstanding the wear that may take place, the
recesses of the tappet are made of such depth that the edges of the projecting
ims of the friction wheel will not come in contact with the bottom of the recesses.
The friction tappet is pivoted to a bolt l, arranged upon the main lever m which
s formed with a socket y to receive a movable handle. This main lever oscillates
or rocks about a bolt or pivot a journaled in a bearing o upon the base plate.
The main lever m has an oval hole through which passes the spindle-nut, so
hat the main lever may rock to a limited extent about its pivot n, which rocking
r oscillating motion of the main lever is effected by means of a lever s pivoted to
pin or bolt, and formed with a sockets to receive a removable handle. The¸·
[Price 81.1

page_text: lever s carries on its short arm a pin ₺ provided with a roller u arranged to work i
a groove in the main lever.
When the screw spindle w of the press is situated vertically, as represented in
the drawings, the engaging or meshing of the friction tappet i with the friction
wheel is ensured by means of two springs a ¹, which are articulated or pivoted
to the main lever m, so that one of these springs presses the tappet towards the
friction wheel, while the other is disengaged (Fig. 2).
When the lever s is turned in the direction of the arrow 1 by a handle inserted in
its socket the main lever rocks about the pivot n in the direction of the arrow 2.
The opposite extremity of the main lever oscillates in the direction of the arrow 3.
By this motion the tappet i, having been kept in engagement with the friction
wheel by the spring, is now pressed (owing to its angular position to the longi-
tudinal axis of the main lever m) towards the friction wheelf which it carries along
with it so that the nut is turned in the direction of the arrow 4, thereby causing
the spindle and the pressure-plate not shown attached thereto to descend. As the
turning movement of the lever m is limited by the extent of the oval hole m', the
latter must be formed according to the extent to which it is desired to turn
the lever s.
When the levers oscillates in the opposite direction the main lever m will also
move in the opposite direction, whereby the friction tappet i is turned back and
caused to slide with its friction faces upon the faces h¹³ of the friction wheel,
as it is pressed by the spring a constantly towards the friction wheel, so that upon
the next forward oscillation of the main lever the tappet will be again in the
effective position and the wheelf will be again partly rotated in a forward
direction.
When the press is to be disengaged the position of the friction tappet i is
reversed and is caused by means of the second spring a to engage with the friction
wheel.
When the nut d has been somewhat loosened, the handle of the levers may be
removed from its socket and be put in the socket y of the main lever m.
If the
pivot pin be now taken out, then the main lever m may be turned around the nut d
by means of the hand lever placed within its socket, so that the nut can be rotated
by the tappet i, and the screw spindle being quickly screwed upward.
By suitably proportioning the distances, 21, 22 and 23, (Fig. 3) the press can be
so constructed that any desired pressure can be produced by the screw spindle w.
then we may exercise a 60 fold pressure.
For instance if
2
1's and
=
In the modification illustrated in Fig. 4 the nut d serves as the pivot for the
main lever m, the hole m' therein being made to fit the nut d, and the bolt n
omitted.
The arrangement and operation is the same as described above, except that the
main lever m rotates about the nut d as a centre. The disengaging and turning
back of the nut d is effected as indicated above.
In
When the presses are constructed with horizontal spindles, then one of the
springs or may be dispensed with as then the engaging of the tappet i with
the friction wheel in one position is effected by the weight of the tappet.
the arrangement illustrated in Figs. 5 to 9 inclusive the tappet i shown in the
other arrangements is replaced by two friction jaws ¹ and 2, which are rigidly
connected to the main-lever m. Upon the flange c of the nut d rests a ring a¹
having on opposite sides thereof a projection a², in each of which is formed a
hole a³, as represented in Fig. 8. The main lever m partially embraces the nut d,
its recess being of a somewhat greater diameter than that of the nut. The main
lever is provided with two holes 61 62 (Figs. 5 and 9), the distance between which
is also a little greater than the distance between the holes a³, in the projections a
of the ring a¹.
When the press is to be worked, the hole is brought over one of the holes as,
and the main lever is connected to the ring a¹ by means of a pin or bolt c¹ passed

page_text: through the two as shown in Fig. 7, so that the friction jaw ♬ securely engages.
with the friction wheel f.
When now the main lever m is oscillated in the direction of the arrow 5 (Fig. 5),
the friction jaw gears with the friction wheel f connected with the nut d, whereas
when the main lever is oscillated in the opposite direction, the friction jaw i will.
be able to move back over the circumference of the friction wheel owing to the
back lash or play between the lever and the nut.
When the press is to be disengaged, the pin c¹ is taken out and the main lever m
is shifted so that the hole 62 thereof coincides with the hole a³, then the bolt e' is
put through these both holes, so that the main lever is coupled on the opposite side
with the ring a'. It will be obvious that the ring a¹ may be provided with one
eye only. In this case it would be necessary for disengaging the nut to turn
the ring about 180° around the nut, in order to couple the ring a' with the hole 62
of the main lever.
The number of grooves of the friction wheel f may be varied according to the..
force to be transmitted.
W. LLOYD WISE,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C., Agent for the Applicants._
COMPLETE SPECIFICATION.
Improvements in Screw Presses.
We, JOHANN KARL JACOBI of Hollerich, near Luxemburgh, in the Grand
Dukedom of Luxemburgh, and the WEILERBACHER HÜTTE of Weilerbach, near
Echternacherbrück, Prussia, 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 :-
In spindle presses it is of importance that the mechanism employed for rotating
the spindle-nut or box should be such that different degrees of pressure can be
exerted as desired to suit requirement.
In the modern constructions the spindle-but is rotated by means of pawls, which
construction has however, the inconvenience that the nut (owing to the action of
the pawls) is exposed to considerable wear so that the mechanism must be repaired
after a comparatively short time, and the several parts must consequently be made
of considerable thickness to enable this to be done.
The object of this invention is to obviate these inconveniences for which
purpose the spindle-nut is rotated by means of friction pawl gearing comprising
either a friction wheel keyed upon the spindle-nut and a friction tappet pivoted to
the main lever, or two friction jaws fixed rigidly to said main lever.
By either of these arrangements it is possible to exert a great pressure, and the-
friction tappet or the friction jaws as the case may be are adjusted automatically to
an extent corresponding to the amount of wear which has taken place.
In the drawings filed with our Provisional Specification
Fig. 1 is a plan of friction pawl gearing with reversible friction tappet and by
means of which two degrees of force can be exerted.
Fig. 2 is a side view thereof, and
Fig. 3 is a vertical section taken through the axis of the screw spindle.
Fig. 4 represents a modification of the pawl mechanism.
Fig. 5 is a plan of a modification with two friction jaws connected rigidly to the--
lever.
Fig. 6 is a vertical section thereof taken through Le axis of the spindle; and
Fig. 7 is a rear view of the same, the two friction jaws being shown in section.
Figs. 8 and 9 are detail views.

page_text: The actuating mechanism is arranged upon the base-plate a which is formed by
two T-irons or beams connected to each other, and which is connected to the
flange c of the nut d by means of hooks b. e is a socket-bearing for the nut d.
Upon the nut is keyed a friction wheelf which has a wedge-like circum-
ferential groove g with inclined straight faces h h', but it is obvious that these
faces may also be curved.
With the friction wheel there engages a friction tappet i which is formed with
recesses in such a manner that it acts on the faces and also on the face h³
of the friction wheel f.
In order to effect a good contact between the friction faces of the tappet i and
those of the friction wheel notwithstanding the wear that may take place, the
recesses kk' of the tappeti are made of such depth that the edges of the projecting
rims of the friction wheel will not come in contact with the bottom of the recesses.
The friction tappet i is pivoted to a bolt arranged upon the main-lever m which
is formed with a socket y to receive a removable handle. This main-lever
oscillates or rocks about a bolt or pivot a journaled in a bearing o upon the base
plate.
The main-lever m has an oval hole m' through which passes the spindle-nut, so
that the main-lever may rock to a limited extent about its pivot n, which rocking
or oscillating motion of the main-lever is effected by means of a lever s pivoted to
a pin or bolt p and formed with a socket to receive a removable handle.
The lever s carries on its short arm a pin t provided with a roller u arranged to
work in a groove in the main-lever.
When the screw spindle w of the press is situated vertically, as represented in
the drawings, the engaging or meshing of the friction tappet i with the friction
wheel is ensured by means of two springs a ', which are articulated or pivoted
to the main lever m so that one of these springs presses the tappet towards the
friction wheel, while the other is disengaged (Fig. 2).
When the levers is turned in the direction of the arrow 1 by a handle inserted
in its socket s¹, the main lever rocks about the pivot n in the direction of the
arrow 2. The opposite extremity of the main lever oscillates in the direction of
the arrow 3.
By this motion the tappet i having been kept in engagement with the friction-
wheel by the spring, is now pressed (owing to its angular position to the
longitudinal axis of the main-lever m) towards the friction-wheel which it carries
along with it so that the nut d is turned in the direction of the arrow 4, thereby
causing the spindle and the pressure-plate not shown attached thereto to descend.
As the turning movement of the lever m is limited by the extent of the oval
hole m', the latter must be formed according to the extent to which it is desired to
turn the lever s.
When the lever s oscillates in the opposite direction, the main lever m will also
move in the opposite direction, whereby the friction tappet i is turned back and
caused to slide with its friction faces upon the faces hhhh of the friction wheel,
as it is pressed by the spring constantly towards the friction wheel, so that upon
the next forward oscillation of the main lever the tappet will be again in the
effective position and the wheel ƒ will be again partly rotated in a forward
direction.
When the press is to be disengaged, the position of the friction tappet is
reversed and is caused by means of the second spring a to engage with the friction
wheel f.
When the nut d has been somewhat loosened, the handle of the lever s may be
removed from its socket and be put in the socket y of the main lever m. If the
pivot pin n be now taken out, then the main lever m may be turned around the
nut d by means of the hand lever placed within into its socket, so that the nut can
be rotated by the tappet i, and the screw spindle be quickly screwed upward.
By suitably proportioning the distances. 1, 2 and 3, (Fig. 3) the press can be
so constructed that any desired pressure can be produced by the screw spindle w.

page_text: For instance if ==== and
========
IB.
then we may exercise a 60 fold pressure.
the modification illustrated in Fig. 4 the nut serves as the pivot for the main-
lever m, the hole m' therein being made to fit the nut d, and the bolt n omitted.
The arrangement and operation is the same as described above, except that the
main lever in rotates about the nut d as a centre. The disengaging and turning
back of the mut d is effected as indicated above.
When the presses are constructed with horizontal spindles, then one of the
springs or may be dispensed with as then the engaging of the tappet i with
the friction wheel in one position is effected by the weight of the tappet.
r
In the arrangement illustrated in Figs. 5 to 9 inclusive the tappet i shown in
the other arrangements is replaced by two friction jaws i¹ and 2, which are rigidly
connected to the main lever m. Upon the flange of the nut d rests a ring a'
having on opposite sides thereof a projection a, in each of which is formed a.
hole a³ as represented in Fig. 8. The main lever m partially embraces the nut d,
its recess being of a somewhat greater diameter than that of the nut. The main:
lever is provided with two holes 6' 62 (Figs 5 and 9), the distance between which.
is also a little greater than the distance between the holes a³ in the ring a¹.
When the press is to be worked, the hole is brought over one of the holes a³
and the main lever is connected to the ring a¹ by means of a pin or bolt c¹ passed
through the two as shewn in Fig. 7, so that the friction jaw i¹ securely engages with
the friction wheel f.
When now the main lever mis oscillated in the direction of the arrow 5, (Fig. 5),.
the friction jaw i gears with the friction wheelf connected with the nut d, whereas.
when the main lever is oscillated in the opposite direction, the friction jaw i will be
able to move back over the circumference of the friction wheel owing to the back.
lash or play between the lever and the nut.
When the press is to be disengaged, the pin e' is taken out and the main lever m
is shifted so that the hole 2 thereof coincides with the hole a³, then the bolt c¹ is.
put through both these holes, so that the main lever is coupled on the opposite side
with the ring a¹.
It will be obvious that the ring a' may be provided with one eye a³ only. In
this case it would be necessary for disengaging the nut to turn the ring about 180°
around the nut in order to couple the ring a' with the hole 62 of the main lever.
The number of grooves of the friction wheel may be varied according to the
force to be transmitted.
Having now particularly described and ascertained the nature of the said inven-
tion and in what manner the same is to be performed we declare that what we
claim is :-
1. In a spindle press, the combination with the spindle nut, of a friction wheel
formed with one or more grooves, and a self adjusting friction tappet provided with
a corresponding groove or grooves, substantially as described for the purpose
specified.
2. In a spindle press, the combination of a spindle nut and a friction wheel
formed with grooves, with a correspondingly grooved friction tappet adapted to be
brought into engagement with the wheel by a spring or by its own weight, a main
lever connected to the tappet by a bolt, and a hand lever provided with a bolt and
roller arranged to enter a groove in the said main lever as herein before set forth for
the purpose specified.
3. In a spindle press, the combination of the spindle nut with a friction-wheel
formed with one or more grooves, a main lever with two friction jaws embracing the
nut, and a ring adapted to be coupled with the said main lever in one or other of
two different positions, as herein before set forth.
4. In a spindle press, pawl mechanism consisting of a friction wheel, formed with
friction grooves, a friction tappet adapted to be reversed in position, and a spring,
as set forth.

page_text: 5. In a spindle press, the combination of a spindle nut, with a friction wheel'
fitted upon the nut and formed with friction grooves, a friction tappet engaging the
said friction wheel, a main lever oscillating about a pivot mounted on the base plate
and loosely embracing the spindle nut; substantially as hereinbefore described for
the purpose specified.
6. In a spindle press, the combination of a spindle nut with a friction wheel keyed
upon the nut and formed with friction grooves, a main lever loosely embracing the
said nut and oscillating about a pivot mounted on the base plate, a friction tappet
pivoted to a bolt mounted on the main lever and engaging with the said friction
wheel by the action of a spring or by its own weight, and a hand lever engaging
with a recessed or grooved portion of the said main lever, substantially as described
for the purpose specified.
7. Mechanism for operating the screw spindle of a spindle press, constructed
arranged and operating as hereinbefore described with reference to and shewn in
Figs. 1, 2 and 3; in Fig. 4; and in Figs. 5 to 9 inclusive of the drawings.
Dated this 4th day of June 1892.
J. K. JACOBI,
By L. W., per F. B.
THE WEILERBACHER HÜTTE,
By L. W., per F. B.
J. K. JACOBI,
By L. W., per F. B.
THE WEILERBACHER HÜTTE,
By L. W., per F. B.