US1295576A - Ditch-digging machine. - Google Patents

Description

K. J- NORDBY.

DITCH DIGGING MACHINE.

APPLICATION FILED JAN. 25. I916.

Patented Feb. 25, 1919.

KRISTOFFER. JENSEN NORDBY, 0]? SEM, JARLSBERG, NORWAY.

DITCH-DIGGING MACHINE.

Specification of Letters Patent.

Patented Feb. 25, 1919.

Application filed January 25, 1916. Serial No. 74,170.

To all whom it may concern:

Be it known that I, Knrs'rorrnn JENSEN NORDBY, a subject of the King of Norway, residing at Sem, Jarlsberg, Norway, have invented certain new and useful Improvements in Ditch-Diggin Machines; and I do hereby declare the fo lowing to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to letters or figures of reference marked thereon, which form a part of this specification.

This invention has for its object to provide an excavator or machine for digging ditches and consists mainly of a vertically swinging digger, which attacks the end surface of the ditch, and of an inclined conveyer [which takes the dug-earth up from the ditch.

The drawing illustrates in side elevation, the front portion of a digging machine embodying my invention.

The digging device consists of a beam 1 of the same or approximately the same shape as the cross sectional shape of the ditch to be dug. On the front side of the beam are provided a plurality of pointed serrated or spade-shaped teeth 2, which form the diggers proper. The beam 1 is held in a guide 3 in which it may be adjusted Vertically according to the depth of the ditch to be dug. The beam is held in the guide by means of bolts 4 threaded through holes 5 in the guide and in the beam 1. The guide 3 is secured at the top by means of a pivot pin 6 to a crank wheel 7 which is put in rotation from the motor (not shown) by means of chains 9, 10 and wheels 14, 15, 16 so as to obtain a suitable speed. Both on the motor and in connection .with one of the chain wheels are provided powerful fly wheels so as to thoroughly equalize the power.

In connection with the wheel 15 is further arranged a friction coupling 11 for cutting the excavator in and out.

The guide 3 is connected below by means of the pivot 12 ,with an arm 17, which is pivotally mounted on a lug 18.

By the rotation of the crank wheel 7 whose radius is shorter than the arms 17, the digging device 1, 2 will therefore perform a swinging motion, the beam being moved bodily in approximately parallel paths whereby every point of'the same will move in circular or approximately circular paths. It will be understood however that owing to the arm 17 being longer than the crank 7 the lower part of the beam will have a greater movement than the upper part in the longitudinal direction of the apparatus.

The two wheels 7 and 16- and the arm 17 are mounted on the lugs 18 provided on the front of the carriage frame. The latter is connected above the front wheel .with a screw-threaded shaft 19 by means of which it may be adjusted so as to enable of elevating or lowering the whole digging apparatus relatively to the front wheels in case this be necessary, owing to the configuration of the lands, in order to render the bottom of the ditch horizontal. For this purpose a leveling apparatus may be provided at the front of the apparatus so as to enable the conductor to control .the level from his seat 20.

v The guidance is effected from the drivers seat by means of the hand .wheel 28-, and gears 29, which act upon toothed segment 30 on the front axle.

During the digging, the carriage is advanced by suitable driving mechanism, not shown. The earth to be dug is cut loose by the teeth 2 of the digging device and received on a sliding shoe 49 mounted at the lower end of a conveyor 37.

Claim:

In a ditch digging machine, a crank disk 'rotatably mounted on the front of the machine frame, a guide pivotedly connected at its upper end to said disk, a link pivoted at one end on a fixed pivot on the front of said frame below and in rear of the periphery of the crank disk and having its free end pivotally connected to the lower end of the guide, a digging bar adjustably In testimony that I claim the foregoing mounted in and extending below the guide, as my invention, I have signed my name in 10 and ad plurellity of superposed cutters presence of two subscribing Witnesses. mounte on tie bar below the uide the length of the link being greatergthari the KRISTOFFER JENSEN NORDBY' radius of the crank disk, [whereby the paths Witnesses;

of the cutters progressively increase from M. E. GUTTERMSEN,

the guide to the lower end of the bar. C. FABRICIUS HANSEN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of l'atente. Washington, D. G."

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