US1050472A - Loading apparatus. - Google Patents

Description

H. LECHTENBERG. LOADING APPARATUS.

APPL1 0A TION FILED JAN. 23, 1912.

1,050,472. Patented Jan. 14, 1913.

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H. LEGHTENBERG.

LOADING APPARATUS. 1 APPLICATION FILED $1111.23, 1912.

1,050,472. Patented Jan.14,1913.

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LOADING APPARATUS. 7

APPLICATION FILED JAN. 23, 1912. 1,050,472. Patented Jan 14,1913.

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LOADING APPARATUS APPLICATION FILED JAN. 23, 1912 1,050,472. Patented Jan. 1 1, 1913.

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APPLIG-ATION FILED JAN. 23, 1912.

.Pa tented Jan. 14,1913.

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UNITED STATES PATENT QFFIQE.

HENRY LEOIITENBER-G, OF QUINCY, ILLINOIS.

LOADING APPARATUS.

T 0 all whom it may concern Be it known that I, HENRY LECHTENBERG, a citizen of the United States of America, residing at Quincy, in the county of Adams and State of Illinois, have invented certain new and useful Improvements in Loading Apparatuses, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to a loading apparatus, and pertains, more particularly stated, to mechanism for operating the loading receptacles of concrete mixing machines, and means for controlling the operation of such mechanism whereby the loading receptacle operating mechanism may be thrown out of action when the loading receptacle has been elevated to discharging position, also whereby the loading receptacle may be temporarily held in its discharging position, and whereby the reverse operation of the loading receptacle operating mechanism may be controlled in a manner to permit a slow and easy return of the loading receptacle to its load receiving position.

Figure I is a side elevation of my appa ratus. Fig. II is an end elevation of the apparatus. Fig. III is an enlarged top or plan view of the loader operating mechanism, including the shifter members for throwing said mechanism into and out of action. Fig. IV is an enlarged longitudinal section through the winding drum of the loader operating mechanism and the parts inti mately associated with said winding drum. Fig. V is an elevation of the ratchet member associated with the winding drum of the hoisting mechanism and the pawls cooperable with said ratchet member, coexisting parts being shown in section taken on line VV, Fig. IV. Fig. VI is an enlarged view, partly in section and partly in eleva tion, of the brake device for controlling the reverse movement of the winding drum of the hoisting mechanism.

In the accompanying drawings: I have shown my apparatus as carried by a truck comprising a frame 1 and ground wheels 2, which truck is preferably employed as a support for a concrete mixing apparatus in order that it may be portable.

3 designates a rotatably mounted mixing drum in which the materials commonly utilized for the production of concrete are Specification of Letters Patent.

Application filed January 23, 1912.

Patented J an. 14, 1913.

Serial No. 672,906.

introduced to be mixed preparatory to being discharged from the drum ready for use. The concrete materials are deposited in the drum by a charging bucket 4, and the concrete is taken from the drum by a pivotally mounted discharge chute 5, movable to and from the position that will provide for the deposit of concrete into the chute as it is elevated within the drum.

A suitable framework A is included in the apparatus contiguous to the mixing drum 3, and this framework includes a pair of frame members 6 located at the side of the apparatus at which the charging bucket at is located. The frame members 6 have secured to them brackets 7 that serve as a support for a pivot shaft 8 to which the spout of the charging bucket is attached. The pivot shaft serves as a fulcrum for the charging bucket, in order that when said bucket is elevated from a lowered position to an elevated position, its spout will be directed into the discharging opening of the drum 3 to empty the contents of said bucket into said drum.

9 designates a hoisting rope, one end of which is connected to the upper end of the framework A, and which extends downwardly from said framework to a pulley 10 having suitable connection with the charging bucket 4. From said pulley, the hoisting rope extends to a sheave 11, also supported at the upper end of said framework, and thence downwardly to a winding drum 12, to which more particular reference will be hereinafter made.

13 designates a main power shaft that may be driven by power communicated thereto in any suitable manner. This main power shaft is utilized to drive the mixing drum 8; and, to provide for its performing such service, the shaft is preferably equipped with a bevel pinion 1% that is arranged in mesh with a bevel gear ring 14: that encircles the -mixing drum.

15 designates a winding drum shaft that is made cooperable with the main power shaft 13 through the medium of a bevel pinion 16 on the main shaft that meshes with a bevel gear wheel 17 on the winding drum shaft so that said shafts will rotate in unison. The winding drum 12 to which the hoisting rope 9 is attached is loosely mounted on the shaft 15, and has associated therewith aclutch member 18 that is adapted to receive the engagement of a shiftable clutch member 15) which is splined to the shaft 15, as seen in llig. l v it will be appreciated. that inasmuch as the. winding drum is loosely mounted upon, the winding drum shaft. said shaft may rotate within said winding drum without imparting rotation to it whenever the shiftable clutch member 19 is freed from the drum carried clutch member 18; and, further that when the shiftable clutch member is placed in engzigen'ient with the winding drum clutch member, the winding drum shaft will operate to impart rotation to the winding drum in one direction to wind the hoisting rope 9 therearoulul.

At one end of the winding drum 12 is a friction ring 20 that is adapted to be gripped by a friction band 21 operable by means to be hereinafter fully explained. At the opposite end of the f tion. drum is a ratchet ring 22 the teeth of which are arranged internally of said ratchet ring and are de signed to receive the engagement of certain elements to be hereinafter more particularly referred to.

it will next proceed with the description of the clutch member shifting mechanism by which the winding drum is placed in cooperation with. the winding drum shaft to provide for the ele'ation of the charging bucket l, and also to the automatically operable means by which said parts are thrown out of cooperation with each other and the winding drum is temporarily restrained from rotation when the hoisting bucket has been elevated and its contents are being delivered into the concrete mixing drum of my apparatus.

(see Jigs. l and Ill), designates a bell crank shifter lever pivotally mounted at 2i, and having one of its arms arranged in engagement with the movable clutch member 19 that is shiftable to and from the winding drum clutch member 18. It is more directly through the medium of this shifter lever that movement is imparted to the clutch member 19 on the winding drum shafh and said lever may be operated at will to shift said clutch member, and with thismbject in view the lever is provided with a handle The shifter lever 93 has pivotally attached to it one end of a connecting bar that leads to elements about to be described which are actuated through the medium of the charging bucket f when the latter is elevated to mixing drum charging position.

Of the elements just referred to, 27 designates a vertical shaft journaled in brackets 28 entending from one of the frame membe 6 of the framework it. The shaft- 27 has fixed to it a throw lever 29 that receives the pivotal connection of the connecting bar 26 whereby said lever is united to the shifter lever 2 The throw lever 29 is provided with a handle 30 by which it may be manipiiilatech if de ech to impart movement to the ctmnecting bar 26 and the shifter lever to shift the. movable clutch member 19. The shaft 2? has lifted to it a crank a in 31 that is pivotally connected at 32 to a push pin 33 operable in a bearing Ell supported by the frame member 3 that supports the brackets 2 8.

The push pin is so located that it is engaged by the charging bucket 4- when said charging bucket is elevated to dumping position; and to provide for such engagement, the charging bucket is preferably furnislnzal with a projection 35 (see full lines Fig. l and dotted lines l i that strikes against the free end oi.

said pin when the charging bucket elevated and pushes said pin backwardly. its the pin 33 moves backwardly it acts to inniart movement to the crank arm 31., causing the shaft 97 to be rotated, the lever 29 to be moved in a direction to exert a pull upon the connecting bar 20, and said connecting bar to in turn exert a pull upon the shifter lever 23" From the foregoing it will be understood that after the mm'able clutch member 1!) on the constantly rotating winding drum shaft 15 has been placed in engagement with the winding drum clutch member 153 the winding drum will cause the charging bucket to be elevated through the medium of the hoisting rod 9 until the push pin 3?) has been moved during the latter part of the upward movement of the hoisting bucket with the result: of disconnecting the clutch member 19 from the winding drum and automatically stopping the operation of the winding drum immediately upon its reaching its dumping positionv Provision is made for temporarily holding the vinding drum from rotation when the charging bucket reaches its dinnpin position. The means utilized for this purpose includes the friction ring 20 carried by the winding drum and the brake band 2i. arranged around said ring. This minus is illustrated in Figs. ill U and i l. The brake band 21 has connected to it at one end an arm 36 and extendiiig from the other end of said band is a rod 37. 38 is a weighted lever pivotally mounted at 3Q and adapted to swing in a vertical plane toward and away from the friction ring 20, so that one time it will occupy the position in which it is illustrated in Fig. Ill and at another time in the position in which it is illustrated in Figs. 1 and i l. The lever 38 has an extension 41-0 that projects from its pivot 39 in a direction toward the friction ring 20, and to which extension the arm 36 attached to the brake band 21. is pivoted at a l. The weighted lever 38 is provided with a lug L2, located above the pivot point 3t) and through which the brake band rod 2-57 in the weighted lever 38, and 45 is a spring controlled hand lever by which the point of said bolt may be retracted from the position in which it is illustrated in Fig. III. 46 is a trip rod pivotally connected to the throw lever 29, from which it extends rearwardly toward the winding drum friction ring 20. This trip rod is slidably arranged in a guide 48, and is provided at its rear end with a laterally extending arm 47, movable in the same path as that in which the trip bolt 44 in the weighted lever 38 is moved.

\Vhen the winding drum 12 of my apparatus is being operated, as previously ex plained, to elevate the charging bucket 4 to dumping position, the lever 38 occupies the position in which it is seen in Figs. I and VT; and at this time the brake band 21 is released from the friction ring of the winding drum so that it is inactive. It will be seen, however, that inasmuch as the trip rod 46 is connected to the lever 29, automatically operated by the charging bucket, that when said lever is moved for the purpose of releasing the winding drum from its driving connection with the winding drum shaft, said trip rod will be moved forwardly. As said rod moves forwardly, it engages the trip bolt 44 and acts to throw the weighted lever 38 from the over dead center position, seen in Figs. I and VI, so that it will fall of its own accord toward a horizontal plane and assume the position seen in Fig. 111, during which movement it acts to tighten the brake band 21 around the friction ring 20, and cause such gripping action as to hold the winding drum from rotation. The hoisting bucket will, therefore, be upheld in its dumping position until the weighted lever has been returned to its former position to release the holding action exerted by the friction band. To permit the return of the weighted lever to its initial position at the desired time, the spring controlled lever 45 is manually operated to retract the trip bolt 44 so that itwill not interfere with the laterally extending arm 47 of the trip bar 46 that engages said bolt in throwing the weighted lever forwardly.

My apparatus includes means for controlling the descent of the charging bucket 4 and the reverse rotation of the winding drum 12 when the charging bucket has been emptied, and which becomes operative immediately after the friction band 21 has been released from holding influence upon the winding drum. 49 is a bevel gear wheel loosely mounted on the winding drum shaft 15 adjacent to the ratchet ring 22 carried by the hoisting drum. This wheel has pivotally fitted to it at its side adjoining said ratchet ring, a plurality of pawls 50, (see Figs. IV and V), that are constantly in engagement with the teeth of said ratchet ring, and which ride idly over said teeth while the hoisting rope 9 is being wound on the winding drum. When, however, the winding drum is released and partakes of a reverse rotation, said pawls are caused to move in a circular path with the winding drum and being carried by the bevel gear wheel 49 act to rotate said bevel gear wheel. The bevel gear wheel 49 is arranged in mesh with the bevel pinion 51 that is carried by a vertical shaft 52 that extends through a bearing in the horizontally disposed friction plate 53. 54 is a brake disk splined to the vertical shaft 52 and resting upon the friction plate 53. 55 are weighted governor arms pivoted at 56 to ears carried by the vertical shaft 52 and having heels 57 at their lower ends which are seated on the brake disk 54.

The operation of the winding drumcon trolling mechanism during the reverse rotation of the winding drum is as follows: As the bevel gear wheel 49 partakes of ro tation with the winding drum in its reverse movement due to the engagement between these parts previously explained, it acts to rotate the vertical shaft 52; and, as said shaft rotates, it carries with it the weighted governor arms 55 which are thrown outwardly relative to each other by centrifugal force, with the result of causing their heels 57 to press downwardly upon the brake disk 54 and create such frictional engagement between this disk and the friction plate 53 as to retard the movement of the shaft 52 and, consequently, of the bevel gear wheel 49 and the hoist-ing drum so that the speed of rotation of said parts will not be greater than desired during the reverse movements ,of the hoisting drum and the charging bucket.

The weighted governor arms 55 are preferably incased within a housing 58, and oil is preferably supplied to the friction plate 53 by an oil cup 59.

I claim 1. A loading apparatus comprising a framework, a charging bucket pivoted to the framework, a lower pulley on which the charging bucket is carried, an upper pulley supported from the framework, a winding drum shaft, a winding drum having a fixed clutch member and mounted loosely on the winding drum shaft, a flexible connection extending from the upper end of the framework under the lower pulley, thence over the upper pulley and thence to the winding drum and connected to the latter, a movable clutch member splined to the winding drum shaft, and a bell crank shifter lever having one of its arms engaging the movable clutch member.

2. A loading apparatus comprising a framework, having a pin bearing, a charging bucket provided with a striker and pivoted to the fran'iework, a winding dram shaft, a winding drum having a fixed clutch member and mounted loosely on the winding drum shaft, a flexible connection be tween the charging bucket and the wind ing drum whereby the charging bucket is 'aised and lowered, a movable clutch member splined to the winding drum shaft, a bell. crank shifter lever, having its inner arm engaging the movable clutch member, a vertical shaft journaled on the framework, a crank arm fixed to the vertical shaft, a push pin slidable in the pin hearing and pivoted to the crank arm, throw lever tired to the vertical shaft, and a connecting bar pivoted to the outer arm of the bell crank shifter lever and the throw lever at its respective ends.

3. A loading apparatus comprising a framework, a charging bucket pivoted to the framework, a winding drum shaft, a winding drum having a friction rin and mounted loosely on the winding drum shaft, a flexible connection between the charging bucket and the winding drum whereby the charging bucket raised and lowered, a friction band adapted to grip the friction ring, having atone end an arm and at the other end a rod, a weighted lever having an extension to which the arm of the friction band is pivoted, and :1 lug to which the rod of the friction band is secured, a spring trip bolt loosely arranged in the weighted lever, and a slidable trip rod pivoted to the throw lever at one end and having an arm movable in the path of the trip bolt at the other end for throwing the weighted lever.

4:. A loading apparatus comprising a fran'iework, having a pin bearing, a charging bucket provided with a striker and pivoted to the framework, a winding drum shaft, a winding drum having a friction ring and mounted loosely on the winding drum shaft, a flexible connection between the charging bucket and the winding drum whereby the charging bucket is raised and lowered, a friction band adapted to grip the friction ring having at one end an arm and at the other end a rod, a weighted lever having an extension to which the arm of the friction band is pivoted. and a lug to which the rod of the friction band is cured, a spring trip bolt loosely arranged. in the weighted lever, a vertical shaft journaled on the framework, a crank arm fixed to the vertical. shaft, a push pin Slidable in the pin bearing and pivoted. to the crank arm, a throw lever fixed to the vertical shaft, and a slidable trip rod pivoted to the throw lever at one end and having an arm movable in the path of the trip bolt at the other end for throwing the weighted lever.

5. A. loading appa 'atus COlIlPliSlllg a framework, a charging bucket pivoted to the framework, a winding drum shaft, a winding drum having a ratchet ring, and mounted loosely on the winding drum shaft, a flexible connection between the charging bucret and the winding drum whereby the charging bucket is raised and lowered, a bevel gear wheel loosely mounted. on the winding drum shaft having a plurality of pawls engaging the teeth of the ratchet rin a friction plate, a vertical shaft having ears and extending through the friction plate and having abevel pinion. meshing with the bevel gear wheel, a brake disk splined to the vertical shaft and resting on the friction plate, and weighted governor arms pivoted to the ears of the shaft and having heels at their lower ends bearing upon the brake disk.

HENRY LECHTENBERG.

In the presence of- HARRY Hmnnnnmia, H. C. SCHAFFER.

Copies of this patent may be obtained. for five cents each, by addressing the Commissioner of Eatents, Washington, D. U.

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