Combined Hand and Engine Power Rock Drilling Machines.
Year: 1887

page_text: Date of Application, 18th Mar., 1887.
Specification Accepted, 19th Apr.. 1887
COMPLETE SPECIFICATION.
Combined Hand and Engine Power Rock Drilling Machines.
We, NATHAN C. POND, MARSHALL O. WEST and ERNEST SIMONS, citizens of the
United States of America, residing at Port Chester in the County of Westchester and
State of New York, U.S.A., Manufacturers of Machinery, do hereby declare the
nature of our invention for improvement in COMBINED HAND AND ENGINE POWER
ROCK DRILLING MACHINES, and in what manner the same is to be performed to be
particularly described and ascertained in and by the following statement :—
This invention relates to that class of rock drilling machines, in which the drill is
given a longitudinally reciprocating motion through the agency of a shaft journaled
transversely to the drill shaft to revolve in the same frame therewith, such as is shown
in the Ingersoll Patents Nos. 344,906 and 344,907. Heretofore reciprocating engines
have been mounted upon tripods to act directly upon the drill to reciprocate it, whereby
the force of every blow of the drill upon the rock was produced and resisted directly
by the engine, every concussion producing a shock and wear upon the parts tending
to rapidly shake and jar the machine to pieces. Reciprocating engines have also been
arranged to propel a hammer to strike upon the head of the drill or its holder; but
such devices have been too cumbersome to be mounted upon a tripod and are not of
the nature of this invention; the object of which is, first, to provide means whereby
an engine may be mounted on the sliding feed carriage of a reciprocating drill, out of
line of the drill and parallel therewith, in order that the motion of the engine may
not tip the tripod over, and in order that the engine may move with the carriage upon
the main tripod frame without contact with the latter. Secondly, to provide means
whereby the reciprocating motion of the engine may be converted into rotary motion
and the same be permanently communicated to a rotary drill driving shaft which is
journalled in a frame to rise and fall in removing and feeding the drill.
To this end, my invention consists in the construction and combination of parts
forming the combined hand and engine power rock drilling machine hereinafter
described and claimed, reference being had to the accompanying drawings, in
which
Figure 1 is a front elevation of a rock drilling machine with an engine attached
According to my invention.

page_text: Figure 2 is a vertical section of the same on the lineæ æ of figure 1, partly in
elevation.
Figure 3 is an enlarged detail view of the engine attaching arm, and
Figure 4 a detail view of the crank bracket.
.
The
No. 1 represents the sides, and 32 cross bars of the main frame. 3 is another cross
bar of the same frame to which the rear leg 4 is hinged, and 77 are the two side
legs hinged to the sides of the same frame. The said frame and legs constitute the
tripod on which both the engine and the machinery of the drill are mounted. 88 are
the sides, 10 the upper cross bar, and 15 the lower cross bar of the drill carriage 26
which is fitted to slide in ways 9, formed on the inner edges of the sides 1 of the
tripod framo. 16 represents a drill shaft journaled to reciprocate longitudinally in
bearings in the cross bars 10 and 15. 13 is a shaft journaled to revolve in the drill
carriage transversely to the drill shaft and connected therewith by any desired means,
such, for instance, as the cranks 14, straps 23, and the cross head 17.
characteristics of the particular drill here shown being the subject of former patents
above referred to, and therein described, are not herein set forth. But the screw 11,
which is journaled in one of the cross bars 2 of the tripod and threaded in the cross
bar 10 of the drill carriage to feed the latter, has in this case been provided with
improved means for propulsion. 18 is a beveled gear wheel fixed upon the screw 11,
and engaged by another beveled gear 19, fixed on the shaft of the crank 12, which
shaft is journaled in a bracket 21, attached to the upper cross bar 2. This change is
for the purpose of locating the crank 12, out of the path of the engine and within
more easy reach of an operator standing on the ground. 66 are curved arms or
brackets formed as extensions of the sides 8 of the drill carriage 26 to support the
engine 20. 55 are arms of the engine cylinder head fitted to rest upon the brackets 6
and secured thereto by means of bolts 33. 24 represents balance wheels mounted
on the shaft 13, and provided with gear teeth and with hand cranks 25. 27 represents
gear wheels fixed on the crank shaft 28, of the engine. This shaft is journaled to
revolve in bearings 34 at the juncture of the arms 5 with the brackets 6 and receives
motion through the agency of the yoke 29, on the piston rod 30, of the engine. 31 is
a steady bearing for the piston rod in a cross bar 32 of the arms 5.
By means of the cranks 25 the drill may be propelled by hand; and by means of
the- gear wheels 24 and 27 and other connections described the drill may be propelled
by the engine. In cases where the drill is more advantageously run for some time by
hand the gear wheels 27 may be removed to disconnect the engine. The arms 6 are
offset from the plane of the drill carriage 26 to enable the engine to be attached to
the drill carriage out of line of the tripod frame so that the engine may pass to and
fro with the drill carriage upon the said tripod frame and keep the gear wheels 24
and 27 in engagement. These mounting arms also permit the engine to be carried
parallel with the drill so that the thrust of the engine does not tend to tip the tripod
over. If these arms 6 were dispensed with and the carriage were extended above the
tripod frame bar enough to carry the engine above the said frame, the weight of the
engine would be top-heavy upon the tripod, besides requiring too much room for
mining purposes. By the interposition of gear wheels 24 and 27 of different sizes
between the engine and the drill shaft, the strokes of the drill bear such an irregular
relation to the strokes of the engine that vibration of parts is checked and the shock
of the drill blows is removed from the engine. Some of the advantages of this
combined hand and engine power rock drilling machine are: the facility with which
it may be adapted to be run either by hand or steam or by both; its directness and
simplicity of operation; its lightness, compactness and adaptability to a great variety
of situations and its comparatively low cost.
Having now particularly described and ascertained the nature of our
invention and in what manner the same is to be performed, we declare that what
we claim as our invention is :
1. The combination of the tripod described, comprising a frame mounted on three
legs and provided with the slide ways 9; a drill carriage 26 mounted to slide on the

page_text: ways 9; and provided with the offset arms 6; a drill shaft 16, mounted to reciprocate
longitudinally in the carriage; a driving shaft 13, journaled in the carriage
transversely to the drill shaft and mechanically connected therewith; gear wheels 24,
mounted on the shaft 13; the engine 20, provided with arms 5 fitted at their ends to
engage the said offset arms 6, the crank shaft 28 connected with the engine and
journaled in the frame 5 and the gear wheels 27 on the shaft 28, adapted to engage
the gear wheels 24, substantially as shown and described.
2. The combination of the tripod, the drill carriage mounted to slide thereon as
described and the engine provided with the arms 5; the said carriage being provided
with the offset arms 6, fitted to engage the arms 5, substantially as shown and
described.
3. The combination with a rock drilling machine carriage having the offset arms 6,
of the engine 20, provided with the arms removably fitted to the said arms 6 of the
carriage, the said arms 5 and 6 forming a journal bearing between them, substantially
as shown and described.