US747783A - Grab-bucket. - Google Patents

Description

PATENTED' DEC 22, 1903.

Notzuaasgf J. W. SHAVER. GRAB-BUGKET. APPLIOATION mum Il AR. 1a. 1903.

3 SHEETS-SHEET 2.

R0 MODEL.

WITNESSES:

JNVENTOR. 4 JOHN WSEAIER.

A TTORNE Y5.

No. 747,783. PATENTED DEOLZZ, 1903.

J. W. SHAVER. GRAB BUCKET.

APPLICATION FILED MAR. 13, 1903. H0 MODEL. 3 SHEBTSSHEBT 3.

' WITNESSES: INVENTOR.

. Q BY JQIWWSEAIER.

J ATTORNEYS.

m: NORRIS Pitgns co, PHOj'd-LITHQ. wAsHINu'mN. D, c:

"UNITED STATES.

Patented December 22, 1903.

PATENT OFFICE.

JOHN WRIGHT SEAVER, OF CLEVELAND, OHIO, ASSIGNOR, BY MESNE ASSIGNMENTS, TO THE WELLMAN-SEAVER-MORGAN COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

GRAAB-'BIUCKET."

SPECIFICATION forming part of Letters Patent N 0. 747,783, dated De ember 22, 1903.

' Application filed March 13,1903. Starla 1N0. 147,669. (No model.)

To all whom it may concern:

Be it known that I, JOHN WRIGHT SEAVEB, a citizen of the United States, and a resident of Cleveland, Ohio, have invented certain Imf provements in Grab-Buckets, of which the following is aspecificatiom The object of my invention is to so construct a grab-bucket as to provide for the opening and closing of the same by means of a more acceptable character than those heretofore used in this class of devices. This object I attain in the manner hereinafter set forth, reference being had to the accompanying drawings, in which- Figure l is a side view of a grab-bucket constructed in accordance with my invention, to-

gether with a crane for carrying the same and mechanism forraising and lowering the bucket and for traversing iton said craue. Fig. 2 is a side view'of the bucket on a larger scale. Fig. 3 is an end view of the bucket and its operating mechanism, the c'ase containing the latter being broken away'in order toillustrate such mechanism; and Fig. 4 is a transverse section through said casing.

A represents the bridge of a traveling crane,

mounted by means of suitable rollers (1 upon runways a, and upon this crane-bridge is mounted,'so as to traverse from end to end of the same, a trolley D, and at, one end of the bridge area pair of winding-drums'B and O and an electric or other motor H, which can be caused to operate either or both of the drums B and O.

The drum B receives the hoisting-rope E, which passes around .a suitable sheave or sheaves on the trolley D, and the drum O receives the rope F, whereby the traversing is effected, this rope passing around a sheave G at the opposite end of the bridge.

In the present instance the bucket is of the clam-shell type and comprises two halves L L,

or J and an arm K or K, connected to the bucket at different points, and these arms may be so proportioned as to length and their with suitable dust-proof bearing-boxes, the

arms J J being preferably contained within hoods I on the outside, of the casing I.

An electric motorM is located between and.

suitably mounted upon the shafts O O,'and motion like in extent, but reverse in direction is imparted to said shafts from the motor by any suitable system of gearing. In-the present instance this system of gearing comprisesa pinion N on the motor-shaft, which pinion meshes with a spur-wheel N, turning loosely on the shaft 0 and having any suitable form of frictional connection with a pinion N likewiseloosely mounted on said shaft 0, said pinion N meshing with aspur-wheel N, which is secured to the shaft 0 and ma pinion N whichmeshes with a spur-wheel N secured to the shaft 0'. While this arrangement of gearing serves to positively swing the arms J .I from and toward each other, further connection between said arms is provided by intermeshing toothed segments S S, carried by the shafts O 0, re-

spectively, as shown by dotted lines in Fig. 2;

In order to prevent excessive lift of the opposite halves of the bucket and also to prevent strain upon the parts when the two halves of the bucket have been closed together, automaticcut-outsP P are provided on thecasing I, one of these cut-outs being struck and operated by one of the arms J when the latter has reached the limit of its downward movement and the other being struck and operated by said arm J when it has reached the limit of its upward movement. The electric motor employed is one whose direction of movement is reversible, the cutto;

out I operating to arrest the movement when the motor is running in one direction and the cut-out P operating to arrest the movement of the motor when it is running in the opposite direction.

Current is conveyed to the motor from the trolley D through a cable Q, which is wound upon a drum R on the trolley, this drum hav ing a normal tendency to wind up the cable Q as the bucket is raised, but permitting the unwinding of the cable as the bucket is lowered.

The mechanism described is asimpler and more effective means of opening and closing the buckets than the usual arrangements of ropes, levers, and sheaves or pulleys, and the weight of the motor and its appurtenances is in many cases an advantage, since this added weight causes the bucket to better dig into masses of ore or other material which are difficult to penetrate.

While I have described and prefer to use a bucket composed of two swinging halves, as shown, it will be evident that my invention is not limited in this respect, but can be applied to other forms of bucket as well.

In case the two halves of the bucket in opening or closing meet with obstructioniwhich is too diflicult to overcome the connection between the spur-wheel N and pinion N will yield and prevent injury to the motor, the gearing, or other parts of the apparatus.

Having thus described my invention, I claim and desire to secure by Letters Patcut- 1. The combination of the movable element of a bucket, a hanger on which the same is mounted, a motor carried by said hanger, mechanism whereby said motor is caused to actuate the movable element of the bucket, a crane-trolley from which said bucket-hanger is suspended so as to be raised and lowered, and a flexible conductor extending from the crane-trolley to the bucket-hanger, substantially as specified.

2. The combination of the movable element of a bucket, a hanger upon which the same is mounted, an electric motor carried by said hanger, mechanism whereby the movement of said motor is caused to actuate the movable element of the bucket, and electric cutouts operating to arrest the movement of the motor when the parts reach either of their extreme positions, substantially as specified.

3. The combination of the two halves of a bucket, of the clam-shell type, arms carrying the said halves of the bucket, shafts for said arms,ahanger in which said shafts are mounted, a motor carried by said hanger, and gearing whereby said motor is caused to move one of said shafts in one direction and the other in the opposite direction, substantially as specified.

4. The combination of the two halves of a bucket of the clam-shell type, arms carrying the halves ofsaid bucket, shafts for said arms, a hanger in which said shafts are mounted, a motor also carried by said hanger, gearing whereby said motor is caused to rock said shafts in opposite directions, and intermeshing toothed segments connecting said shafts, substantially as specified.

5. The combination of the two halves of a bucket of the clam-shell type, arms carrying said halves of the bucket, shafts for said arms, a hanger in which said shafts are mounted, a motor also carried by said hanger, gearing whereby said motor is caused to rock said shaft in opposite directions, and other arms connected to the halves of the bucket and pivoted eccentrically in respect to the rockshafts, substantially as specified.

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

JOHN WRIGHT SEAVER.

Witnesses:

O. W. COMSTOCK, W. A. J ONES.

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