Improvements in Carriers for Lathes.
Year: 1892

page_text: Date of Application, 9th Jan., 1892
Complete Specification Left, 5th Oct., 1892-Accepted, 19th Nov., 1892
PROVISIONAL SPECIFICATION.
Improvements in Carriers for Lathes.
We, FRIEDRICH LORCH, of 28 Westendstrasse, Karlsruhe, OTTO SCHOLL, of
Ettlingen and JULIUS KALLER, of Ettlingen, all in Baden Germany, do hereby
declare the nature of this invention to be as follows:-
When turning objects in lathes, they are in many cases rotated by means of a
looped carrier which is fitted over one end of the object to be turned, and this is
held tight therein by being jammed against one part of the loop by means of a
setting screw, screwing through the other part of the loop. This screw requires
to be screwed with considerable force against the object in order to prevent slip,
and in consequence hereof the carriers soon wear out, and the fixing takes con-
siderable time.
The present invention has for its object to obviate these defects, and it consists
in making the carrier of two separate parts hinge-jointed together at the one end
and provided at the other end with means whereby they can be pressed forcibly
together, so that, the end of the object to be turned being introduced between
the two limbs these in being then pressed together, nip the object firmly between
them, and they being in contact therewith round a considerable part of its circum-
ference, slip is effectually prevented by a comparatively moderate tightening up
of the two limbs. The one limb is made with the requisite extension for being
laid hold of by the pin or arm of the lathe spindle or face plate which carries
it round.
The internal surfaces of the two limbs are made of a configuration to suit the
configuration of the object which they have to grip, such as round or other-
wise curved, polygonal, or flat for flat objects &c., and they may be toothed
or notched to increase their hold; such notches may be so formed that they will
firmly hold objects considerably smaller than the full internal dimensions of the
carrier.
The carriers can either be made of solid metal, or they may be of a U shaped
section, the hollow being presented inwards so that the object is gripped by the
four edges of the limbs. Carriers of this form have the advantage of great.
lightness and strength combined with economy in the material used. Such U section
may be produced either by casting stamping or grooving.
A convenient mode of manufacture is by stamping, for which purpose blanks are
in the first instance stamped of the requisite form out of sheet metal, and after
forming the requisite eyes for the hinge joints, they are subjected to the action of
stamps and dies for bringing them to the requisite U section and general con-
figuration required.
The connection of the two limbs at the open end may be conveniently effected
by means of a screw bolt and nut, hinge jointed to the one limb, and passing.
through a hole or jaw on the other end, at the back of which the nut is made to
bear. When the limbs are of a U section as described, the eye of the screw bolt.
fits between two eyes formed on each side of the limb the parts being connected by
a pin or otherwise.
Dated this 9th day of January 1892.
ABEL & IMKAI,
Agents for the Applicants.

page_text: COMPLETE SPECIFICATION.
Improvements in Carriers for Lathes.
We, FRIEDRICH LORCH, of 28 Westendstrasse, Karlsruhe, OTTO SCHOLL, of
Ettlingen, and JULIUS KALLER, of Ettlingen, all in Baden, Germany, 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 :-
When turning an article in a lathe, it is in many cases caused to rotate by means
of a looped carrier which is fitted over one end of the blank to be turned, and this
end is held tight in the carrier by being jammed against one part of the loop by a
setting screw, screwing through the other part of the loop. This screw requires to
press with considerable force against the blank in order to prevent slip, and con-
sequently carriers soon wear out, and their fixing takes considerable time.
The present invention has for its object to obviate these defects, and it consists
in making the carrier of two separate parts or limbs hinge jointed together at
the one end and provided at the other end with means whereby they can be pressed
forcibly together, so that the end of the blank being introduced between the two
limbs is clamped firmly between them, and, being in contact with them round a
considerable part of its circumference, it is prevented from slipping by a com-
paratively moderate tightening up of the two limbs. The one limb is made with
the requisite extension for being laid hold of by the pin or arm of the lathe spindle
or face plate, which carries it round.
Fig. 1 of the accompanying drawings shews a front and a side view of a carrier
according to this invention suited for round blanks, pipes or the like, of various
sizes. Its two bent limbs a bare hinged together at the one end c, and at the other
end they are drawn together by a bolt and nut d; the one limb has a projection a'
to engage the pin or driver of the lathe.
Fig. 2 shews a driver suited for a flat blank, but, in order that it may be used
for small blanks of round or other shapes, its limbs a bare toothed so as to present
notches of various sizes at various distances from the hinge joint.
Fig. 3 shews a carrier suited for blanks of small sizes which may be held in the
notches of the limbs a b nearer to or further from the hinge joint according as they
of smaller or larger diameter.
Fig. 4 is a perspective view shewing a carrier of the kind described in position in
the lathe driven by the pin e.
The limbs ab may be made of U section so as to grasp the blank with four
instead of two edges. Such a construction presents the advantage that, for large
sizes, they are light and easily handled and secure great strength with economy of
material. Such carriers are illustrated by Figures 5 to 10 inclusive. As shewn
in Figure 10 the limbs ab are of U section open inside so that the blank is held
very firmly by the four edges.
The Ushaped limbs may be formed and hinged in various ways. One way is as
follows. From plate, preferably of steel, are stamped or cut the two parts a¹ 1
Figs. 11 and 12, provided with the holes c' for the hinge and for the bolt, pressed
in dies and bent along their middle lines I, II. The bolt d is preferably made as
an eye bolt so as to turn on its eye as shewn in Figs. 6, 8 and 9. This eye is
inserted between the sides of the U and turns on a pin d' which passes through
these sides. The hinge might be made with a pin, or, as shewn in Fig. 54, it may
have hollow pivots formed by punching up the metal around holes made in the
one limb, and engaged in holes c formed in the other limb. As shewn in Fig. 5 the
bolt eye may be engaged on pivots c* punched up in like manner.
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 :-
1. A carrier for a lathe consisting of two limbs hinged together at the one end

page_text: and clamped together at the other end, one of the limbs having an extension to
engage the driver.
2. A carrier of the kind above referred to with limbs of U section.
3. The construction of carrier with limbs of Ụ section by cutting or stamping,
pressing and bending along their middles, plates a¹ b¹ to form the limbs.
4. A carrier having limbs of U section, with an eye bolt jointed to one of the
limbs as described.
Dated this 15th day of September 1892.
ABEL & IMRAY,
Agents for the Applicants.