US391449A - Camille bobnet - Google Patents

Description

(No Model.)

C.. BORNBT.

- 30.0K DRILLING MACHINE. No. 391,449. Pa,1;11ced0015.4 23, 1888.

WIiEEEEE IIT/mim" UNITED STATES PATENT OFFICE.

CAMILLE BORNET, OF PARIS, FRANCE.

ROCK-DRILLING MACHINE.

SPECIFICATION forming part of Letters Patent No. 391,449, dated October 23, 1888.

Application filed August 6, 1888. Serial No. 282,025. (No model October 8, 1885, No. 70,429; in Spain July 26, 1886, No. 8,776 31, 1888, Nos. 8,327 and 8,460.

To all whom, it may concern,.-

Be it known that I, CAMILLE BORNET, a citizen ofthe Republic of France, residing at Paris, in the said Republic, have invented certain new and useful Improvements in Rock Boring or DrillingMachiues, in part applicable to other boring-machines, (for which I have received Letters Patent in France, No. 152,183, dated November 15, 1882, with two patents in addition dated February 15, 1887, and August 81, 1887, respectively; in Belgium, No. 70,429, dated October 8, 1885, with patent of addition dated August 3l, 1887 in England, No. 248, dated January 6,1888; in Germany, Nos. 8,327v and 8, 460V, dated January 31, 1888, and in Spain, No. 8,776, dated July 26, 1886,) of which the following is a specification.

The present invention relates to improvements in rotary boring or drilling apparatus capable of being actuated either byhand or power, and more especially applicable to the economic boring of hard or soft rocks in the galleries or relative works of mines, quarries, tunnels, andthe like.

These improvements will be successively described With reference to the annexed drawings.

Figure 1 is alougitudinal section showing the application of my improvements to a boring-machine for hard rocks driven bya direct motor. Fig. 2 is a longitudinal section showing the application of the same improvements to a boring-machine for soft rocks-such as coalwith reversible arrangement. Fig. 8 is a transverse section in detail of this apparatus.

In the boring-machine represented in Fig. 1 the central screw, c, is provided with a shoulder or collar, which abuts against cupped, dished, or curved platesprings b, designed to give a certain elasticity to the pressure of the drill or bit upon the rock. These cupped or dished springs are composed, as shown, of steel washers, stamped to a slightly spherical or conical shape, and are coupled two and two, opposite the one to the other, in the manner represented in the drawings. The boring-machine thus improved can be put in motion by hand by means of a crank and bevel-wheels; but it is preferably worked by a rotary motor, g, mounted upon it, the shaft of which trans- .l Patented in France November 15, 1882, No. 152,183; in Belgium in England January 6, 1888, No. 248, and in Germany January mits the motion to the tool-holderf by means of a pinion and toothed wheel h, provided with a key, l, which slides in a groove or slot eut throughout the length of the tool-holderf. A bracket or guard, i, attached by arms to the support or frame of the motor g, serves to retain the gear-wheels h in place and protect their teeth. rIhe rotary motor g can be driven by water, air, or steam. It is mounted on a movable adjustable bracket orsupport, j, which can be secured by a set-screw in such a position that the projection of the motor will not interfere with the work of boring. This special arrangement of the motor mounted on a movablesupport upon the boring-machine may be combined with all sorts of rotary boringmachine irrespective of the various purposes to which the machine may be applied. At its end the screw a carries a lever, c, by means of which it can be turned in either direction, according as it is desired t-o increase or decrease the forward movement of the drill. Ball-bear ings d allow this movement to be made easily during operation, and a bolt or stud, e, retains the lever c in position during ordinary or nor mal work. This arrangement allows for the regulation at will of the ad Vance of the drill or tool according to the hardness of the rock with which it meets by moving or acting upon the lever c either continuously or at intervals. As the action of the spring b allows the screw a to move back slowly, according to the hardness of the rock, it is easy to regulate the position of the bolt e (by means of the set-screw which serves to secure it) in such a way that the lever c, moving back with the screw a, escapes automatically from the control of this bolt e as soon as the pressure upon the drill becomes too great. The screw a, being then no longer held, and being able to turn readily on the ballbearings d, is carried round by friction with the internallyscrewed end of the tubular toolholder f, and this latter ceases to move i'orward until the elasticity of the springs has caused a sufficient cutting away of the rock to ad mit of the forward movement being again begun.

The same improvements are also shown in the simple machine represented in Figs. 2 and 3, which is constructed with a view to boring IOO soft rocks, such as coal. The drill is tted direct to the central screw, k, which has throughout its length a groove or slot wherein slides the key which secures it to the bevel-wheels a. These receive motion from a hand lever or handle, m.

In order to avoid the loss of time necessary to return the screw 7c to its original position the nut o, whichdetermines the forward movement of the tool, carries a projecting ring or collar placed between two similar sets of cupsprings p, each set provided with ball-bearings q. This arrangement renders the apparatus reversible, andit is sufficientafter each boring to turn the whole machine round on its supporting-trunnions r, and to fix the tool or drill at the opposite end of the screw 7tin order that the machine may be ready to operate again.

It will be understood that the invention is not limited to the precise arrangement shown in the drawings to render the machine reversible, and that the employment of other kinds of springs and bearings or abutments arranged one each side of the nut o would permit the attainment of the same result. This machine is provided with a lever, s, and bolt, (similar to c and 6,) which serve to regulate the feed of the machine automatically or by hand, as hereinbefore explained. It can be turned in the inner ring or collar, t, of the support, which serves to connect it with the supporting-frame, and a set or thumb screw, a, engaging in holes made in the frame of the machine, retains the apparatus in the position in which the handle m may be most easily operated when at work. The same result can be attained in a manner equally simple by mounting the supportingpiece of the handle m upon a collar or ring capable of turning round the apparatus, and held or maintained by means of a setscrew in the position which will permit of the machine being easily worked. The two ends of the screw 7a being provided with similar squares, the handle m can be made use of in order to drive this screw direct when the softness of the rock permits.

It will be understood that the application of these improvements is not limited to the two arrangements of rotary boring-machines shown in the drawings. Thus in the arrangement represented in Fig. 2the driving bevel-wheels and the suspension, by means of gimbals, may be suppressed, the screw k being then actuated simply by means ot' a ratchetlever. In this manner a reversible apparatus, automatically adj ustable,ofa simple and cheap construction, is obtained.

I claim as my invention- 1. In rotary rock-boring machines, the combination of cup-springs and ball-bearings acting as support or abutment for the central screw of the drill or its nut for the purpose of giving a certain elasticity to the pressure of the tool and for adjusting the forward movement of the latter while it is working, substantially as described.

2. In rotary rock-boring machines or drills, the combination of a double arrangement of spherical or roller bearings or abutments, and cupped or other springs arranged on each side of the relatively-fixed nut of the central screw 'for the purpose of rendering the boring apparatus reversible, substantially as described.

3. In a rotary boring-machine, the combination, with the tool and its screw, of aspring adapted to hold the tool to its work, and a locking device for the screw, all arranged substantially as shown, whereby when the resistance offered to the tool exceeds the force of the spring the screw or its nut is permitted to turn.

4. In a rotary drilling-machine, the combination, with the tool and its shell, of a motor provided with a band adapted to encircle the shell, gearing connecting the motor with the tool, and a fastening device adapted to hold the motor in any of its adj usted positions upon the shell of the drilling mechanism.

5. The combination, in a rotary boring apparatus, of cupped or dished springs b, ballbearings d, a lever, c, actuating the central screw', and an adjustable bolt, e, with a rotary motor, g, carried upon an arm. j, which can turn around the roek-drill and actuates the tool-holder by means of a spur-wheel gearing, It, substantially as hereinbefore set forth and shown.

6. The combination, in a rotary rock-drill, of a double arrangement of ball -bearings q and cup-springs p, bearing on the nuto of the central screw, an actuating-levens, provided with an adjustable bolt, and a supporting collar, t, provided with a thumb er set screw situated in the center ofthe double-jointed sus pension ofthe rock-drill, as and for the purpose set forth.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CAMILLE BORNE'I.

NVitnesses:

EUGNE DUMAL, UHARLEs BAILLY, J r.

IOO

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