US768902A

US768902A - Elevator or hoist.

Info

Publication number: US768902A
Application number: US19778104A
Authority: US
Inventors: Claus A Juhl
Original assignee: Individual
Current assignee: Individual
Priority date: 1904-03-12
Filing date: 1904-03-12
Publication date: 1904-08-30
Anticipated expiration: 1921-08-30

Description

PATENTED AUG. 30, 1904.

C. A. JUHL. ELEVATOR 0R HOIST.

APPLICATION FILED MAR. 12. 1904.

a sums-sum 1. J

1 if z N0 MODEL.-

1mm PH HUM" D No. 768,902. PATENTED AUG. 30, 1904. 0. A. JUHL. ELEVATOR 0R HOIST.

APPLICATION FILED MAR. 12, 1904.

N0 MODEL. 3 SHEETS-SHEET 2.

3 SHEETS-SHEET 8.

Nb MODEL.

UNITED STATES Patented August 30, 1904.

PATENT @EETEE.

ELEVATOR OR HOIST.

SPECIFICATION forming part of Letters Patent No. 768,902, dated August 30, 1904.

Applicatioirfiled March 12, 1904.

To all whont it may concern:

Be it known that I, CLAUs A. J UHL, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Elevators or Hoists, of which the following is a full, clear, and exact specification.

My invention relates more particularly to that class of elevators or hoists used for hoisting materials to the upper floors of buildings under course of construction and for other like purposes; and it has for its primary object to provide improved, simple, and automatic means for thus elevating wheelbarrows or other receptacles and detaching the same from the elevator mechanism.

With these ends in view my invention consists in certain features of novelty in the construction, combination, and arrangement of parts by which the said objects and certain other objects hereinafter appearing are attained, all as fully described with reference to the accompanying drawings and more particularly pointed out in the claims.

In said drawings, Figure 1 is a side elevation of my improved hoist, showing the same applied to three floors of a building, which appear in section. Fig. 2 is a detail perspective view of a part of one of the hoisting-chains. Fig. 3 is a detail plan view of one of the chainlugs. Fig. 4 is a detail side elevation of a portion of the wheelbarrow. Fig. 5 is afront view of the complete apparatus looking from the left, as in Fig. 1. Fig. 6 is an enlarged perspective view of one of the yokes used on the sides of the barrow. Fig. 7 is a side elevation of the upper part of the apparatus, illustrating the modification hereinafter described; and Fig. 8 is a front view thereof.

1 2 3 areportions of the first, second, and third floors of the building supposed to be under construction and through the upper two of which floors are formed the openings 4, which constitute or provide for the elevatorshaft, which may be over the shaft for the regular elevators of the building, or a special shaft for the accommodation of the materialhoist. In either case I arrange below the lower floor 1, in or directly under this shaft, a pair of sprocket-wheels 5 6, which are rigidly secured to a shaft 7, and this shaft is connected with semi No. 197,781. (No model.)

be driven by a horse attached tothe lever 12 or by any other suitable power.

Directly over the elevator-shaft on the top floor 3 I mount a second pair of sprocketwheels 13 14. These, however, have a free space between them and are journaled on suitable stud-shafts 15, rigidly secured in standards 16, and over these two pairs of sprocketwheels 5 6 13 14 pass two chain belts 17 18, both of which are provided on their inner sides with horizontal lugs 19 20. One of these lugs is shown in detail in Figs. 2 and 3, and as they are the same in construction and operation the description of this one will suffice for both. As appears in Fig. 2, the lug proper is rectangular or square in cross-section and is provided with two flanges or shoulders 21 22 at the inner side of the chain; but this square portion is connected to a round or cylindrical portion 23, which passes through the links of the chain and may serve at that point as a pivot for said links. The outer extremity of this round portion 23 is rigidly secured to a downwardly-extending weighted arm 24, which serves to maintain. the equilibrium of the square-portion 19 of the lugthat is, to ,hold the flat sides of said portion always vertical. The chains are so positioned that a wheelbarrow of any suitable form, one of which is shown at 25, may be wheeled onto the lower floor, but between the ascending folds of the chains, so that the lugs 19 20 as they rise will automatically engage in two yokes 26, secured to the sides of the wheelbarrow, and thus elevate the latter. One of these yokes is shown in detail in Fig. 6, and it will be seen that it comprises two diverging side pieces 26, which are secured at their lower ends to the sides of the wheelbarrow and serve to guide the lugs 19 20 into their places in the yokes, and an inwardly and downwardly curved head 26, which is se cured to the side of the barrow and holds the yoke at a distance therefrom to make room for the engagement of the flange 21 behind the yoke 01 at a position between the yoke is pivoted or hinged at 33, independently of and the side of the barrow, thus precluding the possibility of the yoke becoming dislodged from its place on the lug, but at thesame time allowing the lug to become disengaged from the yoke when the lug starts downward.

The inwardly-bent portions 26 of the yokes are arranged near the upper edges of the sides of the wheelbarrow, so as to avoid, in a measu-re,the possibility of the barrow tipping over in case the weight therein should he unequally distributed, and as a further safeguard against this tipping action the weighted arms 24:, before described, are provided, it being understood that the weights of these arms, being a considerable distance from the center of the lugs 19 20,will be capable of counterbalaneing the wheelbarrow and overcoming any tendency to tip an objectionable degree in the event this tendency should not be entirely overcome by the high location of the yokes on the barrow.

The floor upon which the barrows are to be unloaded is provided in its opening t, adjacent to the chains, with a pair of trap-doors 27 28, having their free edges arranged together contiguous to the upwardly-moving folds of the chains and held against downward movement below the level of the floor 3 by any suitable supports 29, which, however, are located at the sides, so as not to interfere with the upward movement of the wheelbarrows, which rise under and lift the traps 27 28. If desired, these traps 27 28 may be provided with counterweights 3O 31, respectively, arranged at the sides thereof for relieving the resistance of the traps against the barrow when engaged thereby. The sprocket-wheels 13 14: are sufficient in diame ter, or at least arranged a suflicient distance above the traps 27 28, to permit the barrow to swing clear thereof and ride with the chains around the upper sides of the sprockets and finally descend on the opposite side of the elevator-shaft upon an incline comprising hinged and fixed portions 32 32, the barrow remaining on the incline until the lugs 19 2O descend out of engagement with the yokes 26, whereupon the barrow may be removed from the incline, or, if it be provided with wheels or rollers, as shown in Fig. 1, it will automatically run down such incline out of the way of the next loaded barrow. 1n the meantime an empty barrow may be run onto the traps 27 28, which have been closed by hand or allowed to close automatically, and the yol 'es 26 thereof engaged over the first pair of the ascending lugs 19 20, which are coming up empty or without a barrow, thereby attaching the empty barrow to the ascending chain, which carries it upwardly around the upper edges of the sprockets 13 14:, like the loaded barrow; but before it reaches the incline the attendant throws the hinged part or platform 32 up out of the way. This part 32 the fixed part 32, and provided with a counterweight 3st, which holds it in its elevated position until the barrow passes downward, whereupon it may be thrown back again to its position (shown in Fig. 1) for receiving air other, loaded barrow.

In order that the ascending and descending barrows may not by any possibility collide in the event the chains should vibrate excessively, I arrange verticalwires 35 adjacent to the line of movement of the inner end of the ascending barrows and similar wires 36 adjacent to the line of movement of the inner end of the descending barrow, these wires being secured to the building structure in any suitable way, as by rods 37, extending across the floor-beams. The barrows themselves may be of any suitable construction; but in order that the hatches in the floors of the building may not be made larger than necessary for ordinary purposes it is preferable that the handle of the barrow be telescopic, as shown at 38 in Fig. t. hen the empty barrow reaches the lower iioor 1, it alights upon an incline 39, and as the lugs 19 2O descend out of the yokes 26 the barrow runs down the incline out of the way.

In the form of my invention shown in Figs. 7 and 8 the two trap-doors 27 28 are connected by automatic mechanism to the hinged platform 32, so that when the traps 27 28 rise to permit a full barrow to ascend with the chain the hinged platform 32 will automatically descend into the position shown in Fig. 7 to receive it, and when the platform 32 is raised to permit an empty barrow to pass downwardly the traps 27 28 will be lowered into the path of the next ascending barrow, so as to serve the function of again lowering the hinged platform 32 into position to receive the loaded barrow. This automatic action preferably consists of sprocket-wheels at), 4C1, and i2, arranged on the pivots or hinges of thetraps 27 28 and platform 32, respectively, and achain belt 43, passing around the sprockets 40 42 and over and engaging the sprocket 41, so that the motion imparted to the sprockets 40 &1 will always be opposite. It will also be seen that this automatic action between the trap-doors and the platform 32 provides for their operation by simply wheeling the barrow against the outer trap-door 27 while it is in its upright position, thus depressing both of the traps 27 28 and at the same time elevating the platform 32 to allow the empty barrow which depressed the trap 27' in being wheeled onto it to pass downwardly without interference from the platform 32. On the other hand, should the platform 32 be in its upright position while a loaded barrow is rising it will be automatically lowered when the loaded barrow strikes and lifts the traps 27 28.

Having thus described my invention, what I claim as new therein, and desire to secure by Letters Patent, is 1 1. In an apparatus for the purpose described, the combination of a pair of upright belts, means for driving said belts in unison, lugs project-ing from said belts in pairs opposed to each other, a receptacle for carrying material, means on the sides of said receptacle for the engagement of said lugs, and means arranged between the descending sides of said belts for catching and removing said receptacles.

2. In an apparatus for the purpose described, the combination of two upright belts, means for driving said belts in unison, lugs projecting from said belts in pairs opposed to each other, a receptacle for hoisting material, having means for the engagement of said lugs, a hinged trap arranged adjacent to the ascending sides of said belts for supporting one of said receptacles while the lugs ascend into engagement therewith.

3. In an apparatus for the purpose described, the combination of a pair of upright belts, means for driving said belts in unison, lugs projecting from said belts in pairs opposed to each other, a receptacle for material, means on said receptacle for the engagement of said lugs, a hinged trap adjacent to the ascending sides of said belts for receiving and holding an empty one of said receptacles while said lugs ascend into engagement therewith, and a member arranged adjacent to the descending sides of said belts for engaging and dislodging the said receptacle as it descends therewith.

4. In an apparatus for the purpose described, the combination of a pair of endless,

upright belts, means for driving said belts in unison, lugs projecting from said belts, a receptacle for the material, having means for the engagement of said lugs, and a removable platform arranged between the descending sides of said belts forcatching and removing said receptacle.

5. In an apparatus for the purpose described, the combination of a pair of upright belts, means for driving the same in unison, a receptacle for material, the inner sides of said belts and the outer sides of said receptacle comprising detachable means for connecting the receptacle to both of said belts, and means arranged between the descending sides of said bolts for engaging and dislodging said receptacle therefrom.

6. In an apparatus for the purpose clescribed, the combination of a pair of upright belts, means for driving the same in unison, a receptacle for material, means on said receptacle and belts for detachably connecting the belts and receptacle together, and means for engaging and dislodging said receptacle from the belts.

7. In an apparatus for the purpose described, the combination of a pair of upright belts, a receptacle for material, means for detachably connecting said receptacle to said belts, a hinged trap arranged adjacent to one side of said belts and adapted to be struck bythe ascending receptacle thereon, a hinged member arranged adjacent to the other side of said belts and adapted to be engaged by the descending receptacle thereon, and means operatively connecting said trap and member together, whereby they will oscillate in unison.

8. In an apparatus for the purpose described, the combination of a pair of upright belts, means for driving said belts in unison, a receptacle for material, means for detachabl y securing said receptacle to said belts, a pair of hinged traps having their free edges arranged adjacent to the ascending sides of said belts, ahinged platform arranged adjacent to the descending sides of said belts, sprocketwheels secured to the hinges of said traps and platform, and a sprocket-chain passing around the sprocket-wheels on one of the said traps and the platform and over the wheel on the other of said traps.

9. In an apparatus for the purpose described, the combination of a pair of upright belts, lugs pivotally connected thereto, counterweights secured to the pivots of said lugs, a receptacle for material and means for rigidly connecting said receptacle to said lugs.

10. In an apparatus for the purpose described, the combination of a pair of upright belts, angular lugs pivoted thereon, counterweights secured to said lugs, a receptacle for material, and means on said receptacle complementary in shape to and adapted to receive said angular lugs.

11. In an apparatus for the purpose described, the combination of a pair of upright belts, lugs projecting therefrom, a receptacle for material, and diverging yokes secured to the sides of said receptacle for receiving said lugs as the latter ascend.

12. In an apparatus for the purpose described, the combination of a pair of upright belts, flanged lugs thereon, a receptacle for material and yolzes on the sides of said receptacle for engaging over said lugs, said yokes,

being set off from the sides of the receptacle to admit said flanges between them and the receptacle.

13. In an apparatus for the purpose described, the combination of a pair of upright belts, lugs projecting therefrom, a receptacle for material, yokes secured to the sides of said receptacle and opening downwardly for receiving said lugs, and means arranged between the descending sides of said belts for engaging and dislodging said receptacle while said lugs descend.

GLAUS A. J UHL.

l/Vitnessesz F. A. HOPKINS,

M. B. ALLs'rAnT.