US1078842A - Excavator. - Google Patents

Description

J. L. FAIRBANKS- EXGAVATOR.

APPLICATION FILED AUG. 24, 1911. 1,078,842, Patented N0v.18,1913.

a SHEETS-SHEET 1.

rpm- Inventor Attorneys J. L. FAIRBANKS.

EXGAVATOR.. APPLICATION FILED AUG. 2 1911.

1,078,842, Patented Nov. 18, 1913.

3 SHEETS-SHEET 2.

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. APPLIOATION FILED AUG. 24, 1911. I 1 0338 842. Patented Nov. 18, 1913.

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JESSE- FAIBBANKS, F MARION; OHIO.

EXCAVATOR.

Application filed August 24, 1911. Serial No. 645,721.

To all whom it may concern:

Be it known that I, Jesse L. FAIRBANKS, a citizen of the United States, residing at Marion, in the county of Marion and State of Ohio, have invented a new and useful Excavator, of which the following is a specification. 7

This invention relates to an improvement in excavators. a

The primary object of this invention is to provide an excavator in which the dipper supporting arm travels in a fixed plane durticipating 1n the longitudinal movement of ing its load-receiving movement.

A further ob ect of the invention is to provlde a simple and eflicient driving mech- Speeification of Letters Patent.

anism which will. participate inthelongi-= of the handle. ,I+igure 1 is a side eletudinal in-ovemei I In the drawin s vation of the complete apparatus. is a detail view of ta-.1. mechanism.

Fig. 2- dipper arm driving Fig. 3 is a detail view of the-- engine mounting. Fig. at is a side elevation show ng a modified form of driving meeh-.

anism. Fig. 5 is a detail of the driving mechanism. i

In the drawings, designates the car or support for the excavator which supports the boom' 11 in the usual manner. This boom is supported by a beam 12, shroud 1% connecting said boom and beam. The boom 11 which supports the sheave 15 1s of the usual construction being formed of spaced parallel beams each of which is provided with a racltl'l. The dipper arm 18 is supported between the parallel beams being also formed of spaced parallel beams which are provided with racks 19. The racks which are arranged on the parallel beams'ot themain boom are provided with portions li" which extend beyond the edges 17 of'the beam. The bed plate 20 of the engine 21 is arranged to slide on the boom, said bed plate being formed with flanges 24 which extend beneath the portions 17 of the racks 17. The engine 21 is mounted on a carriage including a bed plate 20., the pitman 21 of said engine, driving the shaft 25 on the end portions of which the gears 1-6 are mounted. The slm't't is supported by the side plates 27 which are secured to the engine bed and said gears mesh'with the larger gears 28 ar ranged on a shaft- 29 which is also supported by said plate." The shaft 29 is provided with gears 30, 31, 32 and'33, the gears 30 and 31 being arranged to engage the racks 17 and the gears 32 and 33 the racks 19 which are Patented Nov. is. data.

arranged on the handle. "The yoke which is supported by the shaft 29 contticts with the edges of the beams which conesper arm downward and consonant with this r downward pressure the gears 30 and 31 will move the dipper arm longitudinally through their contact with the rack, the engine parthe dipper arm.

'Steamis supplied to'the reversing valve of the engine by pipes 34, 35, and 36, which are connected by universaljoints 39-which allow the engine to participate in its longitudinal movement; The engine is con trolled by a lever mounted on the car, said lever causing the rotation of a shat 4C1 which in turn drives the shaft 12, the,

shafts being connected by a universal conpllng 43. A gear 44 is mounted on the shatt' lQ said shaft passing through said gear, said gear being adapted to mesh with a gear which actuates the reversmg valve of the engine, the enginein this manner he ing controlled regardless of its position on;

the boom.

It will be noted from the foregoing that the arm whichsupports the'dipper is maintained perpendicular to the ground in its load receiving movement, and although the driving mechanism efiectually impar's longitudinal and vertical movement to the arm,

driving mechanism other than that shown sonant ver-' might be substituted and the ti al and longitudinal movenn secured.

In the modified form of driving mechanism. the motor is mounted on the car, and

the shaft 29 is rotated by means of a mechanism similar to the mechanism for operating the reversing valve of the engine shown .in Fig. 1. This mechanism consists of the square shaft 34 which imparts i'novenieat to a pinion 35' supported by the bracket 36, said pinion 35 meshing with a pini 37 arranged on" the end portion of the shs 25. The shaft 34 is driven by means of at end shaft 38, the shaft being connected by universal coupling 39, the shaft 38 beingsupported by a bracket 40. Mounted on said shaft is a disk 41 which bears against the friction gear 4-2 which is driven by the mo tor 43. The disk 41' is moved across the face of the friction gear 42' by means of the lever 43", the movement of the shaft 84 in this manner being reversed. It will be noted by this construction that the same movement will be imparted to the dipper arm as in the construction shown in Fig. '1, the shaft 34: being allowed to participate in the movement of the boom by means of the universal coupling 39, said shaft sliding freely through the pinion 36 as the dipper arm is advanced longitudinally.

' The many advantages of an excavator of this construction will be clearly apparent as it will be noted that a straight line out is secured, with the dipper arm at any angle, the same rotary movement which propels. the arm in its load-receiving stroke, consonantly pressing said arm downwardly to prevent the same from traveling in an arc.

Particular attention is called to the fact that an excavator of this character may be easily and economically constructed, the various parts being such as may be readily as sembled.

What is claimed is 2- 1. An excavator including a boom, a rack thereon, a dipper arm, a rack uponthe arm, a carriage slidable longitudinally along the boom, a gear supported on the carriage and support the arm, sai

novaaaa carriage and meshing with the arm rack to together about a common axis to simultaneously raise or lower the arm and actuate the carriage, means engaging the shaft and slidably engaged by the arm for holding the arm rack in mesh driven means movable with the carriage for actuatin the gears.

3. An excavator including a boom, racks thereon, a carriage slidably engaging the racks, a dipper arm, racks thereon, a shaft journaled on the carriage, gears upon the shaft and meshing with and constituting pivots for the arm racks, means extending between the arm racks and their gears and engaging the shaft for holding the racks and gears in mesh, gears upon the shaft and meshing with the boom racks, and power driven means upon the carriage for actuating all of the gears simultaneously.

4. An v :cavator including a boom, a rack extending longitudinally of the boom, a dipper arm, a rack upon the dipper arm, a carriage slidably mounted on the boom, a shaft journaled on the carriage, means engaging the shaft and slidably engaged by the arm for holding the arm against movement away from the shaft, a gear on the shaft and constantly meshing with the arm rack, a gear u on the shaft and constantly meshing with the boom rack, and means upon the carriage for actuating the shaft, said dipper arm beine adapted to swing about the shaft-as an axis.

In testimony that I claim the foregoing as my own, i have hereto affixed my signature in the presence of two witnesses JESSE L. FAIRBANKS. 'Witnessesi J. FiLmTvAnLr, PEARL Sononmanacnn.

with its gean-and power gears being revolu'ble

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