IMPROVEMENTS IN BORING-MACHINES
Year: 1881

page_text: LETTERS PATENT to Frank Wirth, of the Firm of Wirth and Company, Patent
Solicitors, at Frankfort on the Main, in the Empire of Germany, for an
Invention of "IMPROVEMENTS IN BORING-MACHINES." A communication
from Isidor Liefmann, of Oberstein, in the Empire of Germany.
T
PROVISIONAL SPECIFICATION left by the said Frank Wirth at the Office
of the Commissioners of Patents on the 26th February 1881.
FRANK WIRTH, of the Firm of Wirth and Company, Patent Solicitors, at
Frankfort on the Main, in the Empire of Germany. "IMPROVEMENTS IN BORING-
MACHINES." [A communication from Isidor Liefmann, of Oberstein, in the Empire
of Germany.]
The Invention communicated to me relates to the construction of automatic
boring machines.
. In carrying out the Invention the improved automatic boring machine is
constructed of a series of boring machines so arranged as to be worked by one line
of shafting. In this manner twelve or fifteen borers can be served by one workman.
These boring machines are best suited for boring agates and the like, as until now
such articles were bored one after the other by one person, this person having to
exercise the necessary pressure.
The belt wheel attached to the shafting sets the spindle in motion by means of a
strap, the borer being attached to the said spindle. The article to be bored is fixed
in a parallel vice carried in bearings in which it can move up and down; this
necessary movement is obtained by means of a cranked lever carrying a friction
wheel working against an excentric on the shaft, by which means it is lifted and
let fall.
This lifting and lowering motion of the borer allows the necessary oil to be
introduced, and prevents the borer sticking fast.
A screw,
which is connected with the herein before described lever, serves to
screw the article up against the borer, and at the same time serves to regulate the
contact of the friction wheel with the excentric.
As long as the friction wheel is not in contact with the excentric a weight on the
lever lifts the parallel vice in its bearings, and thus brings the article it contains up
against the borer.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said Frank Wirth in the Great Seal Patent Office on the 25th August
1881.
FRANK WIRTH, of the Firm of Wirth and Company, Patent Solicitors, at
Frankfort on the Main, in the Empire of Germany.
"IMPROVEMENTS IN BORING-
MACHINES." A communication from Isidor Liefmann, of Oberstein, in the Empire
of Germany.
The Invention communicated to me relates to the construction of automatic
boring machines.
In carrying out the Invention the improved automatic boring machine is
constructed of a series of boring machines so arranged as to be worked by one
line of shafting. In this manner twelve or fifteen borers can be served by one
workman. These boring machines are best suited for boring agates and the like, as
until now such articles were bored one after the other by one person, this person
having to exercise the necessary pressure.
But to make the Invention communicated to me better understood I will proceed
to describe the same by reference to the accompanying Drawing, in which Figure 1
represents a side elevation of an improved boring machine constructed according to
this Invention, Figure 2 is a front elevation, and Figure 3 a plan of the same.
Similar letters in all the Figures represent similar parts.
The belt wheel a attached to the shafting sets the spindle b in motion by means
of a strap, the borer being attached at c to the said spindle b. The article to be
bored is fixed at d in a parallel vice e.
The parallel vice e is carried in the bearings f, in which it can move up and
down; this necessary movement is obtained by the lever and friction wheel h
working against the excentric i, by which means it is lifted and let fall.
This lifting and lowering motion of the borer allows the necessary oil to be
introduced, and prevents the borer sticking fast. The screw %, which is connected
at with the herein before described lever g, serves to screw the article held at d up
against the borer, and at the same time serves to regulate the contact of the friction
wheel h with the excentric i.
As long as the friction wheel is not in contact with the excentric the weight n
lifts the parallel vice in its bearings, and thus brings the article it holds up against
the borer.
Having thus described the nature of the Invention communicated to me, and
the best means with which I am acquainted for carrying the same into effect,
I would have it understood that I do not confine myself to the precise details
herein laid down and shewn in the Drawing, as the same may be varied without
departing from the peculiar character of the Invention, but what is claimed and
intended to be protected by the herein-in-part recited Letters Patent is,
A self-acting boring machine with regulating screw, as herein described and
shewn, working with top and bottom pressure in vertical and horizontal directions,
as herein before, described.
In witness whereof, I, the said Frank Wirth, have hereto set my hand
and seal, this Twenty third day of August, in the year of our Lord One
thousand sicht hundred and nights ora