US1529628A - Excavating machine - Google Patents

Description

March 10, 1925.

J. LEGRAND EXGAVATING MACHINE Patented Mar. l0, 1925.

UNITED #STATES JULES LEGRAND, or sin-MANDE, FRANCE. f

'PA'TEN T '0 FFICEEQ] ExcAvA'rING MACHINE appiicamn filed Angustias, i921. seriaijNo. 497,052.`

a To all whomfz't may concern: i y

Be it known ythat I, JULES LEGRAND, a 'citi- Zen of the French Republic, residing at Stg' an improved apparatus for mechanically excavating subterranean galleries or trenches, which is also applicable for use in connection with military engineering, railways, mines and the like.

The apparatus mayv also be employed to pick up broken material, convey the saine to the rear of the machine and deposit it in a heap.

The invention is illustrated by the acconr panying drawings in which y y Fig. 1 is an elevation of the apparatus operating in a mine gallery.' i

Fig. 2 is a plan offFig. 1 with the hood removed. v

Referring to Figs. 1 and 2 the apparatus consists essentially of a chain of bucket-s 1 mounted in front of a metal framework 2 cari'ied upon a carriage 3 which 1s supported through the wheels 4 having a number of feet pivoted thereto. Buckets 5 mounted on the double chain 1 pass over the'pulleys 6, 7 and 8 and engage the soil with asharp edge. The chains 1 are driven in the direction of the arrow Fig. 1 from an electric motor 9l through the medium of reducing gear 10, v

buckets 5 to act through the arc of a circle and thereby over a larger front than if the frame were stationary. Fig. 2 shows in dotted lines the framework 2 in one of 'its extreme lateral positions corresponding to the breadth of the gallery being excavated. The lateral movement of the framework 2 is effected by means of a worm 13 actuated by a handle 14 and atrain of gears 15' or other convenient mechanism. The material excavated by the buckets is deposited during their downward movementy upon an endless `conveyor 16k which with its connected parts i is `mounted between side lrails 17 disposed'in 'thev interior of the carriage Thedrum 18 over.A which the conveyor passessis driven :in the direction of tlie-arrowand receive its motion from-the electric `motorl) through 'the medium of pulleys and belts '20, or other suitable driving mechanism f may beemployedl. The materialv fromthe conveyor 16 may be shot into trucks or onto another conveyor independent of the'excavat-ing apparatus.

The advancement of the whole apparatus on its wheels is effected by the motor 19 orI other convenient mechanism actuating the rearv axlethrough the medium of speed re-` lducing gear and train of wheels 21. l

A detachable hood of sheet steel 22 is Vdisposed above the apparatus to protect the operators and the machine from possible falls of dbris. p The energy necessary for the movement of the parts of the apparatus is `furnished by an electric generator `disposed externally of the apparatus. l .p 4 v A metallic shield 23 is placed in front of the carriage 3 to catch anymaterial which may escape from the buckets and to clear the soil in front of the wheelslll of the apparatus.

Before advancing the apparatus in a gal` lery wooden supports must be inserted in plane of the Imaterial excavated, and `dis- Y posed'in anyv approved manner.

Further the apparatus may be made to run upon a track of wood or-iron made` in pieces Aand placed beneath tion advances. l

constructed that vit may be easily, taken to pieces to facilitatetransport.l .e y u I,claim:-. Y 1`. An apparatus for the wheels as the excava- The apparatus may also if desired be so mechanically excav#l y" y ating subterranean gallerles or trenches-and the llke comprising 1n combination an auto-`` mobile frame, a vertical pivot axle upon the front end of said automobile frame, aframc I I i pivotally mounted upon-saidl axle, sprocket pulleys mounted theone ,above the other at one end of said pivotable frame, aY bucket chainguided upon'isaid pulleys ,so that'itj i. lforms an excavating head forproducinga cavity' into which the apparatus' can vadvance, a motor upon theot'her end of said f v f, l1l() pivotable vframe for driving said sprocket pulleys, an inclined conveyingv sheet 'ar-4 ranged in the longitudinal axis ofthe auto muy..

mobile frame extending with its lower end under the top end of said bucket chain in i order `to'receivethe material poured out by the buckets, and extending at its other end a 5 conveniently great distance beyond the end ofl tlie automobile frame in order to deliver the conveyed material directly into trucks.

2. An apparatus for rmechanically excavatlng subterranean galleries or trenches automobile frame,A a vertical pivot axle upon fthe front end `ofsa-id automobile traine, a pvandthe like 4cornprising in combination to excavate the ground for a height which is Slightly superior to the height of the apparatus, a motor upon the rear end of said pivotable traine designed'to drive the rearinost'of said pulleys and a conveying band `,carried by said automobile frame extending upward from the front end-to the rear end and-designed to receive upon its low front end the material poured out by the buckets and to deliverthe :same Aat the' rearinto separate truclrs. l

In testimony Wlaeiieof I fa'x my signature in pnesence of two Witnesses.

.JULES LEGRAND.

VViftneSses y ,AN-uien VBLoUin.` HENRI BLoUm.

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