New or Improved Means or Apparatus for Imparting Percussive or Reciprocating Motion to Rock Drills or other Tools Instruments.
Year: 1886

page_text: Date of Application, 13th May., 1886.
Complete Left, 14th Feb, 1887.
Complete Accepted, 18th Mar., 1887.
PROVISIONAL DIBUITICATION.
New or Improved Means or Apparatus for Imparting Percussive
or Reciprocating Motion to Rock Drills or other Tools
Instruments.
or
We, FREDERICK CARRINGTON PHILLIPS, of No. 2, Victoria Mansions Westminster
in the county of Middlesex, electrical engineer, and HUGH ERAT HARRISON, of the
same address, electrical engineer, do hereby declare the nature of our invention to be
as follows:
This invention has for object to enable percussive or reciprocating motion to be
imparted by means of electricity to rock drills or other tools or instruments such as
hammers. For this purpose a solenoid is employed to produce the required recipro-
cative motion which may be in a right line, or an oscillatory motion in a curved
course about a fixed centre. An arrangement of apparatus for the purpose of this
invention is as follows:
A solenoid is provided with a surrounding sheathing or cover (hereinafter called
the sheathing) of divided and insulated iron. It may be built up of bars or wires more
or less insulated from one another and arranged at right angles to the direction of
current in the solenoid. There is a core (which may be made of insulated bars)
inside the solenoid. The sheathing and the core are so arranged and constructed that
they include all or practically all the effective lines of force generated from the
solenoid, and may make a complete or nearly complete magnetic circuit when pulled
together by the magnetic attraction due to the current in the solenoid.
Make and break or shunting devices are provided of such construction and arrange-
ment that they may be actuated by the core or moving part in such manner that the
current may be established and broken or shunted in the solenoid to produce the
reciprocating movement of the core and this may be effected automatically. These
make and break or shunting devices may be such that they can be actuated by hand
or otherwise independently of the moving core or part. An arrangement for the
purpose is as follows:
Three contact pieces and a bar are provided, the arrangement being such that the
bar can be caused to rest against either one two or all of the three contact pieces by
the moving core or part, or by other means. One contact piece is connected to one

page_text: end of the wire of the solenoid, the other end of this wire is permanently connected to
one pole of a source of electricity; a second contact piece is permanently connected to
that pole of the source of electricity that is not permanently connected to solenoid;
and the third contact piece is connected permanently to one end of a wire which in the
single arrangement is a simple resistance, or in a compound arrangement such as
hereafter described may be the coil of the second solenoid. The other end of this
wire is attached permanently to that pole of the source of electricity to which one end
of the wire of the solenoid (or of that one which gives the forward movement if there
be two) is permanently connected. With this arrangement when the bar is caused to
rest against the first and second contacts only the solenoid (or that one which gives
the forward motion) is energised and the forward or working movement is effected.
As this is done however the bar is moved so as to rest upon only the second and third
contact pieces, thus causing the solenoid to relax its hold, and admitting of the return
movement of the core or moving part carrying the tool, and where there are two
solenoids energising the second solenoid to effect such return movement.
By the addition of suitable adjusting devices (such as two cams adjustable on the
hefore mentioned bar) the times and duration can be controlled as already mentioned,
whether one solenoid or more be employed.
In conjunction therewith means are provided whereby the times and duration of the
current can be controlled independently and in relation to any particular phase in the
movement of the core or moving part (which might be the sheathing if the core
were fixed).
By the means above mentioned a tool or instrument, such as a drill of the kind used
in quarrying stone, can be caused to give blows which may be varied in rapidity and
in force at pleasure, and which, may be automatically controlled. The core can be
moved to return the tool after each blow by the action of gravity or of a spring or by
other suitable means. Two or more solenoids can be arranged such-wise that one or
all of them may act to produce the forward or operative movement of the tool, and one
or all of them may cause its reverse or receding movement. Such an arrangement
with two solenoids is as follows:-
The one solenoid is so placed in relation to the other (hereafter called the main
solenoid) that when a current is passed through it its attraction will be in a contrary
direction to that of the main solenoid: thus it will act to bring the core or moving
part back to its normal position after the forward or operative movement has been
effected the current may in this arrangement be suitably shunted from one coil to
the other and thus produce the reciprocating movements With such an arrangement
the core will be always magnetised in the same sense, which will be advantageous as
affecting the construction of the core, the heat generated therein, and the speed or
rapidity of its movements.
Two or more solenoids or systems can be arranged in either tandem or parallel
fashion. An advantage of such an arrangement will be that it will afford increased
power.
A solenoid and core according to this invention may have combined therewith an
arm or a lever (or more than one) acting after the manner of an armature and
alternatively attracted and repelled or released and so giving the required reciprocating
movements, the solenoid and core remaining stationary, and the armature being built
up of iron pieces insulated from one another similar to the core and sheathing.
F. C. PHILLIPS.
W. Lloyd Wise,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicants.

page_text: COMPLETE SPECIFICATION.
New or Improved Means or Apparatus for Imparting Percussive
or Reciprocating Motion to Rock Drills or other Tools
Instruments.
ΟΙ
We, FREDERICK CARRINGTON PHILLIPS, of No. 2, Victoria Mansions, Westminster,
in the County of Middlesex, Electrical Engineer, and HUGH ERAT HARRISON, of the
same address, Electrical Engineer, 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:-
This invention has for object to enable percussive or reciprocating motion to be
imparted by means of electricity to rock drills or other tools or instruments such as
hammers. For this purpose a solenoid or electro magnet is employed to produce the
required reciprocating motion which may be in a right line or an oscillatory motion in
a curved course about a fixed centre. An arrangement of apparatus for the purpose
of this invention is as follows:
A solenoid is provided with a surrounding sheathing or cover (hereinafter called
the sheathing) of divided and insulated iron. It may be built up of bars or wires
insulated from one another and arranged at right angles to the direction of current in
the solenoid or approximately so. There is a core (which may be made of insulated
bars) inside the solenoid.
The sheathing the core and the armature are so arranged and constructed that they
include all or practically all the effective lines of force generated from the solenoid or
electro magnet, and may make a complete or nearly a complete magnetic circuit when
the armature is pulled into close proximity to the sheathing and core by the magnetic
attraction due to the current in the solenoid.
Make and break or shunting devices are provided of such construction and
arrangement that they may be actuated by the core or moving part (hereinafter
called the armature) in such manner that the current may be established and broken
or shunted in the solenoid to produce the reciprocating movement of the armature and
this may be effected automatically. These make and break or shunting devices may
be such that they can be actuated by hand or otherwise independently of the armature.
An arrangement for the purpose is as follows :-
Three contact pieces and a plate which is permanently attached to one of the
contact pieces (hereinafter called the second contact piece) are provided, the arrange-
ment being such that the plate can be caused to rest against either one or both of the
other two contact pieces by the armature or by other means. One contact piece is
connected to one end of the wire of the solenoid, the other end of this wire is
permanently connected to one pole of a source of electricity; a second contact piece
which is in permanent contact with the plate is permanently connected to that pole of
the source of electricity that is not permanently connected to the solenoid, and the
third contact piece is connected permanently to one end of a wire which in the single

page_text: arrangement is a simple resistance, or in a compound arrangement such as hereafter
described may be the coil of the second solenoid. The other end of this wire is
attached permanently to that. pole of the source of electricity to which one end of the
wire of the solenoid (or of that one which gives the forward movement if there be
two) is permanently connected. With this arrangement when the plate is caused to
rest against the first contact only, the solenoid, (or that one which gives the forward
motion) is energised and the forward or working movement is effected. As this is
done, however, the plate is moved so as to rest upon only the third contact piece, thus
causing the solenoid to relax its hold and admitting of the return movement of the
armature or moving part carrying the tool, and where there are two solenoids
energising the second solenoid to effect such return movement.
By the addition of suitable adjusting devices (such as two cams adjustable on the
before mentioned plate) the times and duration can be controlled as already mentioned,
whether one solenoid or more be employed.
In conjunction therewith means are provided whereby the times and duration of the
current can be controlled independently and in relation to any particular phase in the
movement of the armature or other moving part. It is sometimes convenient to make
the armature fixed and obtain the motion from the sheathing or electro magnet.
By the means above mentioned a tool or instrument, such as a drill of the kind used
in quarrying stone, can be caused to give blows which may be varied in rapidity and
in force at pleasure, and which may be automatically controlled. The armature can be
moved to return the tool after each blow by the action of gravity or of a spring or by
other suitable means. Two or more solenoids or electro magnets can be arranged
such-wise that one or all of them may act to produce the forward or operative
movement of the tool, and one or all of them may cause its reverse or receding
movement. Such an arrangement with two solenoids or electro magnets is as
follows: The one solenoid or electro magnet is so placed in relation to the other
(hereafter called the main solenoid or electro magnet) that, when a current is passed
through it, its attraction will be in a contrary direction to that of the main solenoid or
electro magnet: thus it will act to bring the armature back to its normal position
after the forward or operative movement has been effected the current may in this
arrangement be suitably shunted from one solenoid to the other and thus produce the
reciprocating movements. With such an arrangement the armature may be always
magnetised in the same sense which will be advantageous as affecting its construction,
the heat generated therein, and the speed or rapidity of its movements. Two or more
solenoids or electro magnetic systems can be arranged in either tandem or parallel
fashion. An advantage of such an arrangement will be that it will afford increased
power.
A solenoid with sheathing and core according to this invention may have combined
therewith an arm or a lever (or more than one) acting after the manner of an
armature and alternatively attracted and repelled or released and so giving the
required reciprocating movements, the solenoid with its sheathing and core remaining
stationary, the armature being built up of iron pieces insulated from one another in a
manner similar to that of the core and sheathing.
Referring to the accompanying sheet of drawings,
a
Fig. 1 is a vertical section in the line A B of Fig. 4 of apparatus according to this
invention wherein two solenoids or electro magnets are employed for imparting
reciprocating motion to an armature mounted on a shaft that carries a rock drill or
other tool.
Figs. 2 and 3 are transverse sections on the lines CD and E F respectively of
Fig. 1.
Fig. 4 is a plan partly in section on the line G H Fig. 1.
Fig. 5 is an end view.
1 and 2 are circular coils or solenoids of insulated wire. Each coil is enclosed on

page_text: :
(see Fig. 2) and are insulated from each other and from its frame 4 by suitable
insulating material 3*. 5 and 6 are insulated hoops or rings encircling the bars or
plates so as to bind the bars or plates and coils securely together the hoop or
ring 5 also serving to fix the bars or plates in their frame 4. Each coil with its bars
or plates 3 constitute an electro magnet. The armature of the electro magnets
comprises, in the example shown, a series of iron bars or plates 7 carried by a boss or
enlargement 8 of a shaft 9, the said bars or plates being insulated therefrom and from
each other by suitable insulating material 10. The boss or enlargement 8 is provided
with a flange 11 that takes into a slot formed in each of the bars or plates (see Fig. 1),
and with projecting edges 12 that bear against the sides of the said bars or plates so
as to prevent end wise displacement thereof. 12* is an insulated hoop or ring that
serves to bind the bars or plates 7 on to the boss or enlargement S. The armature
shaft 9 reciprocates in bearings provided for it in the frames 4, and carries a rock
drill 13 or other tool. The frames 4 are so relatively placed that a space is left
between the electro magnets in which the armature may reciprocate.
The automatic make and break or shunting device whereby the reciprocating motion
of the armature and its shaft and tool is caused, is as follows:-
14 is a plate pivotted at 15 to a bracket of insulating material 4* secured to one of
the frames 4. The plate 14 is provided with tappets or extensions 16 and 17 against
which a pin or projection 18 carried by the shaft 9 alternately strikes so as to cause
the plate to automatically oscillate on its pivot and alternately make and break
contact with separate insulated contact pieces 19 and 20. 21 is a spring one end of
which is connected to the plate at 22, its other end being fixed at a point 23 above the
pivot 15. This spring serves to retain the plate 14 in either of the positions into
which it is moved by the pin or projection 18.
:--one
The contact pieces 19 and 20 are mounted on and insulated from a spindle 24 with
right and left handed screws, and are so arranged that by turning the spindle by hand
they may be caused to approach or recede from each other thereby enabling the time
and duration of the energising current of each solenoid or electro magnet to he
adjusted. The plate 14 is preferably so arranged that it may come into contact with
one of the contact pieces before it breaks contact with the other so that the current
may be shunted from one electro magnet to the other without breaking the circuit.
The plate 14 is provided with a handle or extension 14* whereby it may be operated
by hand or other means instead of by the pin or projection 18. The apparatus
hereinbefore described is connected up with an electric generator as follows:-
pole (say the positive) of the electric generator is permanently connected to the
plate 14 through its pivot at 15, and the other pole (say the negative) with one end of
each of the coils 1 and 2. The other ends of the coils 1 and 2 are connected to the
contact pieces 19 and 20 respectively. By this arrangement it will be seen that when
the plate 14 is in contact with the contact piece 19, the coil 1 will be in circuit and
will be excited, and thereby cause the armature to move forward. The pin or
projection 18 will then actuate the plate 14 and cause it to make contact with the
contact piece 20, thereby completing the circuit of the coil 2, which will then cause
the armature to move backward. After closing the circuit of the coil L, the circuit of
the coil 2 is broken by the movement of the plate 14. This reciprocating movement
will continue automatically. When one electro magnet only is employed to effect the
forward movement of the armature and tool carried thereby the return movement is
effected by a spring weight or equivalent device, the current being shunted from the
coil of the electro magnet, through a suitable resistance, during the return movement
of the armature.
Having now particularly described and ascertained the nature of our said invention,
and in what manner it is to be performed, we declare that what we claim is
1. In apparatus for imparting percussive or reciprocating motion to rock drills or
other tools or instruments, a solenoid or electro magnet, the iron of which is in the
form of bars or plates insulated from one another in directions approximately at right

page_text: angles to the direction of the electric current in the wires or conductors of the said
solenoid or electro magnet, substantially as described.
2. In apparatus for imparting percussive or reciprocating motion to rock drills or
other tools or instruments, a solenoid or electro magnet and armature, the iron of
which is in the form of bars or plates insulated from one another in directions
approximately at right angles to the direction of the electric current in the wires or
conductors of the said solenoid or electro magnet, substantially as described.
3. In apparatus for imparting percussive or reciprocating motion to rock drills or
other tools or instruments, the combination of two or more solenoids or electro
magnets such as referred to in claim 1 with one or more armatures substantially as
described and shown.
4. In apparatus for imparting percussive or reciprocating motion to rock drills or
other tools or instruments, the combination with a solenoid or electro magnet or
magnets such as referred to in claim 1 of a make and break or shunting device
operated either by the reciprocating part or by other means, substantially as described.
5. The improved apparatus for imparting percussive or reciprocating motion to rock
drills or other tools or instruments, substantially as described with reference to the
drawings.
F. C. PHILLIPS.
W. Lloyd Wise,
Per F. J. Brougham,
46, Lincoln's Inn Fields, London, W.C.,
Agent for the Applicants