Improvements in or Connected with Boring Apparatus.
Year: 1886

page_text: Date of Application, 26th Aug., 1886.
Complete Left, 19th May, 1887.
Complete Accepted, 21st June, 1887.
Communicated from abroad by
HASENOERL, Engineer, both of Vienna, in the Empire of Austria.]
Improvements in or Connected with Boring Apparatus.
I HERBERT JOHN HADDAN of 67 Strand in the County of Middlesex Civil
Engineer, do hereby declare the nature of this invention to be as follows:-
The universal detent dog device forming the object of this invention is in itself a
complete tool for boring purposes according to the free fall or detent dog system and
many parts and details of it are perfectly new, whilst the other remaining parts are
also provided with essential improvements.
The free fall boring tool or detent dog consists chiefly of a sleeve and detent piece.
The sleeve is of sufficient thickness to receive two inserted steel segments at the
upper end of the slit which segments form a durable and removable seat or bearing
for the catch key of the detent piece. The lower end of the slit has a lateral
enlargement of peculiar form, this enlargement serves as a safety lock and is so
arranged that its upper face is provided with a notch, intended to prevent a slipping
off of the catch key, whilst its lower face if provided with an inclined plane intended
to hold the catch key in a secure position during the introduction of the tool. This
lock nevertheless does not prevent the use of the detent dog as a sliding dog since the
key possesses sufficient bearing or seat in the groove without necessitating its entrance
into the lock. The detent piece carries at the upper end the catch tie or band
arranged at a short distance from the sleeve. The boring rod carries at each end
tapered holes into which fit the ends of the boring tool and of the detent piece
respectively. Suitable keys passed through slots in the joints fix the whole together.
The widening boring tool, which is also provided at both ends with a similar joint
carries the fiinshing cutters arranged to turn outward on bolts or pivots and kept in
a horizontal position by an internal spindle, with a flat head pressed upwards against
shoulders on the cutters by a spiral spring. Before the introduction into the boring
bole, the finishing or widening cutters are tied or bound together by means of a thread
or wire which passes over the main cutting chisel which thus enables the tool to he
"

page_text: introduced through the narrow safety tubes, when the end of the tool has arrived at
the bottom of the boring hole the edge of the chisel, striking downwards severs the
binding thread or wire so that the finishing or widening cutters assume their outward
position and widen the boring hole to an extent requisite for the introduction of the
following safety tubes.
A rail of steel is situated above the finishing cutters, and receives the direct
pressure of these, and may be replaced when worn out. The chisel provided at its
upper end with a joint similar to those described has at its lower end the edge or
cutter of known shape of section, but the shaft or shank is not of round or square
section as hitherto but has throughout its length a flattened and oblong section with
blunt edges. This shape of section of the shank gives the greatest possible strength
of the chisel.
For the purpose of effecting in the most perfect manner the rebound of the boring
beam or sweep as requisite for freefall borings and without the use of the steam
cylinder, the new transmission gearing described herein after is employed. The
present arrangement of the boring beam or sweep is such that the crank does not
directly lift the boring tool but lifts the counter weight arranged at the other end of
the boring beam, which counterweight is heavier than the boring tool and hence by
its own weight draws downward the louger end of the boring beam. By means of
this overweight the rebound of the boring-beam is effected in the simplest manner.
An open clastic bearing, arranged on the boring beam, where the rod connects the
latter with the crank, gives about 30 m.m play to the trunnion of the said rod. This
play permits the boring beam to strike upon the rebound rail, without effecting a
rebound upon the rod.
The boring beam of wood or metal lies upon a pivot on the frame and carries at its
back end the counter weight and at its front end a segment which is connected
thereto by means of a bolt. This segment is held firmly in an advanced position by
means of a second bolt. The segment, serves to constantly guide the boring rod
exactly in the center of the boring hole during the oscillation of the boring beam.
By sliding back the segment after extraction of the second bolt, the boring hole is
left perfectly free.
The extension of the boring rod during boring is effected by means of a chain
which passes over the segment to a drum turned by a worm wheel which receives its
motion from a worm on the shaft of a hand wheel.
Dated this 26th day of August 1886

page_text: Improvements in or Connected with Boring Apparatus.
I, HERBERT JOHN HADDAN, of 67, Strand, in the County of Middlesex, Civil
Engineer, do hereby declare the nature of this invention, a communication to me
from abroad by Albert Fauck, Proprietor of Mines, and Eduard Hasenoerl, Engineer,
both of Vienna, Austria, and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement :-
The universal detent or percussion arrangement forming the object of this invention,
is in itself a complete tool for boring purposes, whilst the other improvements are as
follows reference being had to the drawings.
The boring-tool is represented in two views in the annexed drawings (Figures 1
and 2) and consists chiefly of the sleeve A and detent-piece B.
The sleeve A is of sufficient thickness to receive two steel-segments a², a³ at the
upper end of the slit, which segments form a durable and removable seat or bearing
for the "catch-key" b¹.
Fig. 3 shows in cross-section (on the line a, b, of Fig. 1) the disposition or
arrangement of the segments.
The lower end of the slit has a lateral enlargement a", the peculiar form of which
may be seen in view in Figures 1 and 4a, and in section in Fig. 4, this enlargement
serves as a safety-lock and its upper face is provided with a notch y, in order to
prevent the catch-key from slipping off, whilst its lower face is provided with a
recess, intended to hold the catch-key in a secure position during the introduction
of the tool.
This lock nevertheless does not prevent the use of the detent for the key possesses
sufficient bearing or seat (at e Fig. 4a) without necessitating its entrance into the
lock.
The detent-piece B carries at the upper end the catch-key b¹, which is secured
firmly by the locking-key and locking-pin 6 Fig. 5.
The latter is driven through the holes of the sleeve. In addition the detent-piece
is provided with the catch tie or band t.
The boring-rod C is arranged at both ends for double-key locking. The keys k
driven through holes serve for ready and speedy unlocking,
The widening boring-tool D, which is also provided at both ends with a double-key
locking carries the "finishing"-cutters, arranged to turn around bolts or pivots d¹
and kept in a horizontal position by the internal spindle e by means of the spiral-
pressing spring (Fig. 1); the circular shape of cross-section of this spindle changes
at the lower end into a flat and broadened form (Fig. 6).
Before the introduction into the boring-hole the finishing or widening cutters are
tied or bound together by means of a thread or wire g in the position shown in Fig. 7
and thus allow of the introduction of the tool through the narrow safety-tubes; when
the end of the tool has arrived at the bottom of the boring-hole, the edge of the chisel
striking down severs the binding thread or wire so that the finishing or widening

page_text: cutters assume the position shown in Fig. 1 and will enlarge or widen the bore to the
extent requisite for the introduction of the following safety-tubes.
is a rail of steel situated above the finishing cutters, which receives the direct
pressure of the same and which may be replaced when worn out.
The chisel E provided at its upper end with double-key-locking and disengaging
aperture I has at its lower end the edge or cutter of known shape of section: but the
shaft or shank is not of round or square section as hitherto, but has throughout all its
length a flattened and oblong shape of section with blunt edges corresponding to the
shape of the edge of the chisel (Fig. 9).
This shape of section of the shank or shaft secures the greatest possible strength of
the chisel and its great resistance against fracture on account of the most favourable
distribution of the material.
For the purpose of effecting the rebound of the boring beam or sweep for free-fall-
borings without the use of the steam boring cylinder the improved arrangement of the
boring-beam or sweep is such that the crank does not lift directly the boring-tool but
lifts the counter-weight arranged at the other end of the boring-beam, which counter-
weight is heavier than the boring-tool and hence by its own weight draws downward
the longer end of the boring-beam.
•
By the agency of this over-weight the inventor is enabled to effect the robound of
the boring-beam in the simplest manner.
This new arrangement illustrated in figures 10 and 11 of the annexed drawing is
the following:
The open rebound-bearing a arranged on the boring-beam gives about 1 inch play
to the trunnion of the pitman. This play permits of the boring-beam striking upon
the rebound-rail c without effecting a rebound upon the pitman b, since the trunnion
of the crank d after the rebound is not prevented from executing the remaining part
of the descent to the lowest point, on account of the fact that the bearing a gives
sufficient play to the trunnion of the radius-rod.
By tightening the bearing a and lowering the rebound-beam c the whole arrange-
ment may be used without rebound.
The boring-beam e of wood or metal (represented as consisting of two iron beams
of I shaped section) has its pivot of oscillation at and carries at its back-end the
counter-weight and at its front end a segment g, which by means of the bolt g¹ is
connected to the beam.
This segment is represented in Fig. 10 in advanced position, in which position it is
held firmly by means of a second bolt g².
The segment serves to constantly guide the boring-rod exactly in the centre of the
boring-hole during the oscillation of the boring-beam.
By shifting back the segment into the position shown in dotted lines, after
extraction of the bolt g³ the bore-hole is made perfectly free.
The driving-wheel S, which constantly turns in one direction drives the crank d by
means of the tooth-wheels h, h².
The extension of the boring-rod during boring is effected by means of a chain, which
runs over the segment g and rolls f¹ to the drum i. A worm wheel k which by means
of worm receives its motion from wheel 2 is arranged on the axis of the drum.
The conveying or working transmission for the boring rod and tool consists of
drum 7, transmission-wheels 1, 12, driving disk 13, belt, and disk keyed upon the
driving arbor.
The conveying or working is effected by bringing the tightening roll m to bear
against the belt by means of the levers m³ and m so that this belt is bent inwardly
and pressed to a sufficient extent, so as not to run loosely on the disks, but transmits
the motion from the driving arbor to the arbor of the disk and from this by means
of the cog-wheels 2, to the drum l.
The brake beams are applied to the disk by means of the brake-levers n', n².
The retrograde motion of the conveying-drum is effected by the two belt
pulleys, o, belt o and friction-disk o³, which latter is lifted by means of the lever-
mechanism o, o, o" and pressed against the friction disk o'.

page_text: The "excavator transmission" consists of the drum p and the two friction-rolls p', P³
the one of which (p') is arranged on the axis of the drum whilst the other is attached
to the driving arbor. This transmission is actuated by means of the hand lever q,
intermediate levers 7, 7, drum p, and friction disks p', p².
The braking is effected by means of brake block r, arranged underneath the friction
roll p, against which brake-block the friction roll p¹ is caused to hear by means of the
hand lever y.
Having now particularly described and ascertained the nature of the said invention
and in what manner the same is to be performed, I declare that what I claim is :
1. In the free-fall-boring-tool the removable seat or bearing a³, a' at the upper part
of sleeve A, of a safety-lock of peculiar shape formed by the enlargement a" at the
lower end of the slit.
2. In the widening boring-tool at the interior of the boring-body D, the pressing
mochanism consisting of a pressing-spring and a spindle e flattened at the lower end
and of a removable and changeable steel-rail du above the widening or finishing-
cutters d¹¹.
3. The use of the double-key-lock for connecting the detent piece of the free-fall-
boring-tool, boring-rod widening-cutter and chisel.
4. The chisel of the free-fall-tool with peculiar form of the slank.
5. The weight for effecting the rebound of the boring-beam or sweep.
6. The arrangement of a segment g, Fig. 10, at the front end of the boring-beam.
7. The worm-gearing k, k¹, k².
8. The combination of the conveying transmission 1, 1, 1, 1, 1, 1 for the rod-system
and the boring-tool, the straining or stretching-device m, m², m³, bruke n, n², nº and
retrograde-movement gear o, o³, 0, 0³, 01, 0º, 0º,
9. The excavator-transmission p, p, and q, q', 72 and brake-block r.
All substantially as illustrated, described, and for the purposes set forth.
Dated this 19th day of May 1887.
H. J. HADDAN.
By Herbert & Co.,
67, Strand, Agents.