US836494A

US836494A - Shaft-boring apparatus.

Info

Publication number: US836494A
Application number: US17703903A
Authority: US
Inventors: Eduard Frieh; Rudolf Noellenburg
Original assignee: TIEFBOHR AKTIEN GES DEUTSCHE
Current assignee: DEUTSCHE TIEFBOHR - AKTIEN - GESELLSCHAFT; TIEFBOHR AKTIEN GES DEUTSCHE
Priority date: 1903-10-14
Filing date: 1903-10-14
Publication date: 1906-11-20
Anticipated expiration: 1923-11-20

Description

PATENTED NOV. 20, 1906.

1 UNITED sTTFs PATNT oFFIoF.

EDUARD FRIEH AND RUDOLF N OLLEN'BURG, OF NORD-HAUSEN, GERMANY,

ASSIGNORS TO DEUTSCHE TIEFBOHR -AKTIEN GESELLSCHAFT, -O NORDHAUSEN, GERMANY, A CORPORATION.

SHAFT-BORING APPARATUS.-`

To a/ZZ whom it may con/cern:

Be it known that we, EDUARD FRIEH, whose post-office address is N o. 18 Erfurterstrasse, and RUDOLF NLLFNBURG, whose post-office address is No. 13 Rothenburgerstrasse, Nordhausen7 Kingdom of Prussia, German Empire, subjects of the King of Prussia, German Emperor, have invented a new and useful Shaft-Boring Apparatus, of which the following is a specification.

The several forms of percussion shaft-boring apparatus at present employed fory soil containing a large amount of water, but not quicksand, are operated from the surface of the ground by being raised and lowered bymeans of rods or cables whether the work is performed by a single large drill or for the purpose of reducing the weight by a group of small drills mounted in a fixed frame. The momentum to be overcome in raising the drills requires considerable non-productive expenditure of power and disadvantageously limits the number of strokes. The great stroke indispensable for obtainingza good blow results, under the present circumstances, in large losses in friction and water at the wall of the shaft, which in view of thel large masses employed is of great disadvantage.

The present-invention obviates the above drawbacks and greatly 1increases the afli-l ciency of the lboring by the arrangement within a revoluble air-tight casing of a group of automatic drills, each of which is operated independently from a point in proximity to its point of application.

The invention 1s illustrated in the an- Figure 1 is a sectional ing apparatus constructed in accordance with my invention. Fig. 2 Jis a horizontal section thereof, and Fig. 3 is a detail view showing the construction of the individual drills.

Referring to the drawings in detail, A is `a cylinder of 'steel or other suitable material and of any desired size, which is made airtight by plates B B, secured/'within and in proximity to each end thereof... Communicatin with the exterior of each of the plates B an B and passing through the air-tight chambers are a plurality of tubes E, which form inlet-pipes for admitting water to the drill-heads F of the drills C', mounted within at their upper ends to a plate D. Secured to the plate D is a cover G, to which is con-` nected arod H, by means of which the apparatus may be rotated. J is a mud-drum mounted on the cover G.

As shown in Fig. 3, the raising of the drillheads F is effected by means of solenoids s s s, fed by the conductor Z. Springs f are provided for neutralizing the shock due to the falling of the drill-head and also assisting the drills in rising on the next stroke.

As indicated in the drawings by the arrows, the water before escapingvv to the bot-r tom ofthe shaft circulates about each drill, whereby an advantageous cooling of the coils which become heated during operation is obtained. On escaping from the apparatus and rising between the .apparatus and the wall of the shaft the circulation of water carries away the small stones, and owing to the sud. den reduction ofvelocity deposits the heavier Patented Nov. 20, 1906. 'J

said tubes and which are detachably secured stones above the mud-drum J, into which they fall. The slime or stones can be removed from the latter without any interference with the operation of the apparatus by means of special devices or can be raised to the surface with the apparatus itself when it becomes necessary to change the drills.

Owing to the great capacity obtained in' this way; at a comparatively small cost the apparatus can be used 'not only for boring shafts under water, but also advantageously employed in sinking shafts in dry or marshy places.

Having thus described our invention, what we claimas new, and. desire to secure by Letters Patent, is v 1. In a shaft-boring apparatus, the'combination of a rotatable casing, a plurality of drill-containing tubes mounted therein, a drill having an up-and-downfstroke mounted in each of said tubes, a tube surrounding each of said drill-containingl tubes and forming water-circulating means'and operating means carried by each of said drills.

2. In a shaft-boring apparatus, the/combiloo nation of a rotatable casing, a group of drillsl carried thereby, mechanism carried by each of said drillsto raise the same and springs arranged on each drill and adapted to assist the raising of said drill, substantially as and for 1o 5 theK purpose specified.

AB. ln a shaft-boring apparatus, the combi\ nation with a casing constructed as an air vesselv and carrying a group ofseparatelyoperated drills, essentially as and for thc purpose described.

4. In a shaft-boring4 apparatus, the combination of a rotatable casing, a grou of drillst IOy carried thereby, mechanism carrie by each of said drills to raise the same' and springoperated means mounted on each drill and adapted to assist the said mechanism in raising each of said drills, substantially as set forth. k,

In testimony whereof We have hereunto set our hands in presence of two subscribing 15 Witnesses.

EDUARD FEIEH. y RUDOLF NOLLENBURG.

Witnesses:` i

HENRY HAsPER, WQLDEMAR HAUPT