US552575A

US552575A - calhoun

Info

Publication number: US552575A
Authority: US
Publication date: 1896-01-07
Anticipated expiration: 1913-01-07

Description

3 Sheets-Sheet l.

D. I.v CALHOUN; EXCAVAT'ING MACHINERY.`

N5. 552 5v5. Patented Jan. v, '1895.

ANDREW EJSRAHANL PHOTO-UMD. WASMIN ETONJC.

. (No Model.) '3 sheets-sume.

'13.41. CALHOUN. EIXAVATING MACHINERY.

Nor 552,575. Patented Jan. '7, 1896,

II n Nl ANDREW BGRANAM. FHUTO-LITNU. WASHINGTIN. D C

(No Model.) 3 Sheets-Sheet 3.

D. I. CALHOUN.

` BXGAVATING MACHINERY. 5 No. 552,575. y Patented Jam?, 1895.

ANDREW EGRAHAM.PHUTOUTMQWASHINGDNJ-C.

NiTE rares ATENT OFFICE.

DANIEL I. CALHOUN, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE CALHOUN EXCAVATOR COMPANY, OF SAME PLACE.

MACHINERY.

SPECIFICATION forming part of Letters Patent No. 552,575, dated January 7, 1896.

Application le August 23, 1895.

T all whom t may concern.-

Be it known that I. DANIEL I. CALHOUN, a citizen of the United States of America, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Excavating Machinery, of which the following is a specification.

My invention relates to excavating machinery of that class in which a carriage running upon a suitable cable supports a scoop adapted for excavating earth, a carriage being provided with a suitable operating-rope for raising and lowering the scoop and drawing the carriage along the cable, and means being provided for securing the carriage at a predetermined point upon the cable, and also for inverting the scoop and dropping its contents at a predetermined point beneath the cable. i

The invention is fully described and explained in this specification and shown in the accompanying drawings, in which- Figure l is a side elevation of a cable-track, suitably supported at its ends, a carriage running upon the track, a scraper dependent from the carriage, and means for operating the parts, as hereinbefore suggested and as hereinafter set forth. Fig. 2 is a top plan of a scraper resting upon its iiat surface, as shown in Fig. 3. Fig. `is a longitudinal vertical section of the scraper shown in Fig. 2. Fig. a is a detail view showing one end of the transverse latch-operating lever of the scraper. Fig. 5 is an enlarged side elevation illus trating the locking device and a dumping d'evice on the cable and their operative relation to the carrier and scraper. Fig. 6 is a top plan illustrating the locking device mounted on the cable. Fig. 7 is an enlarged view, partly in side elevation and partly in vertical section, of the dumping mechanism. Fig. Sis an enlarged vertical section through the line 8 S, Fig. 5, illustrating the mechanism for clamping the dumping attachment at any given point upon the cable. Fig. 9 is an 0blique section through the line 9 9, Fig. 7, the view being downward.

In the views, Ais a suitable cable-track supported at its ends upon towers or other structures A A', which may be either stationary or sem No. 560,192. (No model.)

movable along parallel lines at right angles to the line of the cable. Upon the cable A runs freely a carriage made up of two plates B B, connected by suitable transverse bolts and provided withrollers R R, lying between the upper margins of the plates and resting upon the cable. An operating-rope R is fastened at r to a pivoted tumbler E, hereinafter fully described, and passes over a pulley R2, mount- 6o ed in the carriage, a ruiming-pulley R3 beingv supported upon the rope between its end r and the pulley R2. The pulley-block is provided with a hook r, Figs. l and 5, which connects it with the scraper.

At any desired point upon the cable, and usually near one of its ends, is secured alocking device adapted to hold the carriage stationary during the operation of lling the scraper, this device being shown in Figs. l, 5, and 6, and being made up of a tube C encircling the cable, dependent arms C C, and horizontal arms C2 C2 adj ustably fastened to the dependent arms so as to be raised or lowered. At the end toward the carriage on the cable the arms C2 C2 are spread apart sufficiently to embrace or receive between them the end of the carriage, as indicated in Fig. 6, and a transverse rod c, Figs. 5 and 6, eX- tends across the space between them and is adapted to enter notches N N, Fig. 5, formed in the edges of the plates B B of the carrier. Between the two plates B B is a lockinglever D, pivoted near its center and having at one end a hook or shoulder d, adapted to move upward from the position shown in Fig. 5, and thus to engage the rod c and secure the carrier in a stationary position upon the cable. Two small swinging latches b b, pivoted to the plates B B, are adapted to swing into the position shown in Figs.` 5 and 6 and prevent accidental upward movement of the rod c, thereby preventing accidental escape of the rod from the hook d until the latter is moved downward completely to the position in Fig. 5, in the manner hereinafter explained.

Between the plates B B is pivoted a tumbler E, formed at one end with a notch e, and having at its opposite end a shoulder adapted to receive a short locking-lever e', also piv oted between the two plates, the point of at- ICO tachment fr of tlie'operating-rope R being above the pivot of the tumbler and on the side thereof toward the notch e. The notch e is adapted to receive a transverse pin f, lying between the upper ends of the cheekpieces F of the pulley-block R3, and thus to support the pulley-block and scoop when the tumbler is locked in the position shown in Fig. 5. A transverse pin e2, Fig. 5, is set in the tumbler E and passes through a slot d in the locking-lever D, and by means of this engagement the oscillation of the tumbler Oscillates the lever D, thereby raising and lowering the hook d.

When the parts are in the position shown in Fig. l, the carriage being looked to the transverse pin in the ends of the bars C2, the hook d is raised to engage the transverse pin, the short locking-lever e being out of engagement with the end of the tumbler, the opposite end of the tumbler being dropped down and the pulley-block R2 being free from the carriage. Then the parts are in this position the scoop may be iilled by means of the draftrope, and may then be raised until it reaches the position shown in Fig. 5, when the transverse pin f will enter the notch e of the tumbler, lifting the latter to the position shown in Fig. 5 and permitting the engagement with the tumbler of the short lockinglever e', thus securing the pulley-block and scoop in their raised position. The same upward movement of the notched end of the tumbler raises the slotted end of the locking'- lever D and depresses the opposite end of the lever to the position shown in Fig. 5, thereby permitting the carriage to move away from the locking device C C C2.

The scoop or scraper supported upon the pulley-block R2 resembles in many respects the scraper which I have shown and described in a prior patent, No. 506,667, but has certain novel features which may be particularly described. The body of the scraper consists of two` end pieces G G, approximately triangular in shape and having their bases curved approximately in arcs of circles, anda casing G' connecting the two end pieces and extending along one straight side and the curved base of each end piece.

Tov the outer faces of the end pieces are pivoted two bars-H Il, connected by a transverse bar II, set back aconsiderable distance fromthe bars Il Il, and joined to them by means of'parallel side pieces H2', lying alongthe end pieces G G of the scraper. In the scraper as heretofore constructed by me the bars H H'y were connected by a transverse bar lying substantially in their own plane 5 but Ihave found that the offset transverse bar shown herein has the advantage of leaving the entire throat of the scraperl open, so that it may be more readily illed.

To the inner faces of the end pieces Gl G are pivoted two latches I I, providedV with springs z t andhavin g their outer ends hooked to-engage the bars H2, as shown in Figs. 2, 3

and 5. The free ends of the latches l I are in engagement with short arms 7c, formed on a crank-lever K, pivoted in suitable ears k', the rocking of the crank-lever in the direction indicated by the arrow in Fig. 3 being adapted to disengage the hooks of the latches l l from the ends of the bar H2. Then the hooks of the latches I l are in engagement with the transverse bar of the scraper and the scraper is suspended from the pulley-block R2, the crank-lever K is in the position shown in Fig. 5, and its movement in the direction indicated by the arrow in that figure is adapted to release it from the bars H2 and permit the scoop to swing about the pivots at the lower ends of the bars H Il, and thereby discharge its contents.

At any desired point upon the cable A is secured the mechanism shown in Figs. 5, 7, 8 and 9, which is adapted to operate the cranklever K and dump the scraper in the manner described in the last preceding paragraph. This mechanism consists of a frame made up of two parallel sets of bars united by suitable transverse bolts so as to embrace the cable, the frame being made up in substance of horizontal bars L L, lying above the cable, and downwardly-extending bars Ll L2, joined to the bars L L, the bar L2 being curved at its lower end toward the bar L', as clearly shown in the figures. The frame is provided with two rollers R4 R4, resting upon the cable, and with a stationary jaw Z, above and in contact with the cable. A second jaw Z lies below the cable and is vertically movable so as to be pressed against it, and a lever Z2 is pivoted to the frame and adapted to press the movable jaw upward against the cable and lock the frame in place at any desired point thereof. This lever may be operated by means of a cord Z3, attached to its lower end and passing about a pulley, as shown in Fig. 7, the application of force to the respectiveV ends of the cords being adapted to move the free end of the lever correspondingly and thus to loosen or tighten the clamp Z.

Between the two bars L2 L2 is pivoted a lever M, connected at its upper end with a horiZontally-sliding bar M and at its lower end with a horiZontally-moving bar M2, sus` IOO IIO

pended by means of a link MS from the point raised from the position shown in Fig. l to that shown in Fig. 5, and is there'locked toL the carriage, thereby releasing the carriage fromthe lock C C2, the` draftv upon the rope R moves the carriage and scraper along the cable toward the dumping device just eX- plained until the carriage strikes the free end of the bar ifi', as shown in Fig. 5, thereby forcing this part backward and pressing the free end of the bar M2 forward and slightly upward. This movement of the bar swings the crank-lever K in the direction indicated by the arrow thereon in Fig. 5, and thus dumps the scraper and permits its contents to fall to the ground. The slackening of the rope then permits the carriage to run back toward the lock C' C2, the scraper during this movement being locked to the carriage.

Between the dumping device and the locking device on the cable is secured at any suitable point a block O, provided with a dependent latch o, adapted to swing in one direction but not in the other from its normal vertical position. The position of this latch is such as to `permit the carriage to move freely from the locking device C' G2 to the dumping device; but upon the return of the carriage the short locking-lever e' in passing under the latch o is thrown out of engagement with the end of the tumbler, and the notched end of the tumbler is thereby permitted to drop down and release the scraper, which thus descends to the ground while the carriage is still moving toward the lock upon the cable, the scraper being thus ready for filling when the cable reaches the locking device and is secured in a stationary position.

The dumping mechanism hereinbetore described resembles somewhat in function and operation the one which I have shown and described in said former patent; but it has the advantage of equalizing the strain and shock brought upon it by the carriage and scraper, since this strain is communicated` through the ends of the two parts M M2, instead of being applied at a single point. It has the t'urther advantage of ready adjustability upon the cable, and I have found in practice that it strains the cable much less than the other device, for the reason that it does not produce the upward thrust upon and deiiection of the cable which was incident to the use of the other form.

Having now described and explained my invention, what I claim as new, and desire to secure by Letters Patent, is-n 1. The combination with the body of a scraper formed substantially as described, of the bars, Il, H, pivoted to the scraper and connected by the offset transverse bar, H', and side bars, H2, the latches adapted to engage said bars, the crank-lever, K, engaging said latches and adapted by its oscillation to disengage them from the bars and permit inversion of the scraper; substantially as shown and described.

2. The combination with the cable andthe locking device secured thereto and embodying the suitably supported bars, C2, C2, provided with the transverse pin, c, of the car# riage frame, B, B, provided with rollers resting upon the cable, the oscillating lever, D, provided with a hook adapted to engage the pin, c, the latches, Z9, b, adapted to secure the transverse pin against accidental vertical movement and means substantially as shown and described for operating the hooked lever and thereby locking and unlocking the carriage at a predetermined point upon the cable.

3. The combination with the cable, the carriage moving on the cable, and the scoop dependent from the carriage, ofthe bars, I-I, H, pivoted to the scoop and connected by a transverse bar, the latches, I, I, also pivoted to the scoop and adapted to engage the bars, H, H, or an attachment thereof, the crank lever, K, pivoted to the scoop and adapted to actuate the latches, and a dumping mechanism supported upon the cable substantially as 'shown and described and embodying a suitable frame supported by the cable, a swinging lever, M, pivoted to the frame, and two horizontally moving bars, M', M2, connected with and actuated by said lever, one of said bars being adapted to receive the thrust of the carriage, and the other being adapted to actuate the crank lever upon the scoop; substantially as shown and described.

a. The combination with the cable, the carriage moving thereon, and the scoop supported thereby and provided with the bars, H, H, latches, I, I, and crank lever, K, operating substantially as described, ofthe frame, L, L', L2, supported upon the cable and provided with clamping jaws, Z, Z', the lever, Z2 Z2, adapted to operate one of said jaws and thereby clamp the frame to the cable, and mechanism supported by the frame and adapted to receive the thrust of the crank lever upon the scoop and thereby disengage the latches, I, I, and permit the dumping of the scoop.

5. The combination with the cable, the carriage moving thereon and the scoop supported thereby and provided with locking means for holding it in an upright position, of the frame supported on the cable and provided with means for actuating the locking device on the scoop, clamping jaws mounted on said frame and adapted to grip the cable, a lever operating one .of said jaws and a cord attached to the lever whereby it may be oper ated vfrom a distance; substantially as shown and described.

DANIEL i. cALHoUN.

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