US1118241A - Hoisting device. - Google Patents

Description

C. A. SIGAFOOS.

HOISTING DEVICE. APPLIGATION FILED 1211.11, 1913.

Patented Nov. 24, 1914.

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Clark A. Sl"5afoos,

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G. A. SIGAFOOS.

HOISTING DEVICE.

APPLICATION FILED APR.11, 1913.

1,1 18,241 I Patented Nov. 24, 1914.

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UNITED STATES PATENT curios.

CLARK a. sIGAroos, on OMAHA, NEBRASKA.

HOISTING DEVICE.

Application filed April 11, 1913.

H) all whom it may concern:

Be it known that I, CLARK A. SIGAFOOS, a citizen of the United States, and a resident of Omaha, in the county of Douglas and State of Nebraska, have invented cer tain new and useful Improvements in Hoisting Devices, of which the following is a specification.

My invention relates to elevating and hoisting mechanism, and has for its object the provision of a hoisting mechanism having a separable or detachable table or platform provided with wheels or casters whereby the same may be used as a truck for the conveyance of the materials to be hoisted and for storing such materials until desired for use.

My invention is especially useful in connection with the printing trades, and provides means whereby large quantities of paper when received may be placed at once on a wheeled conveyance, left in place on such conveyance until desired for use, and then elevated so that portions of the material may be conveniently transferred to the feed table of a press.

In the accompanying drawings,Figure 1 is a front elevation of mechanism embodying my invention, Fig. 2 is a side view of the same, Fig. 3 is a bottom view of the wheeled platform, and Fig. 4 is a perspective view of the same when loaded.

In carrying out my invention 1 provide a frame having a pair of vertical guide members of which the lower ends rest upon and are secured to a floor so as to leave an open and unobstructed space upon the floor between them. In the illustrated construction each of the vertical guide members comprises a pair of angle-bars 1 of whichthe ad acent flanges are disposed parallel.

and in spaced relation to each other. Each pair of the bars is secured to a base-plate 2 resting upon the floor A, and at their upper ends carry the heads 3 and 4:. The heads are connected to each other by horizontal transverse members 5, and have suitable bearings therein for the ends of drum-shaft 6. On said shaft adjoining the heads are the helically-grooved drums7 to which are connected the ends of the cables 8 which extend downwardly and are connected to the lifting-heads 9. Said heads are slidably mounted on the vertical guide-members. 1, being movable independently of each other, except in so far as their actuating mechanism is in common.

Specification of Letters Patent.

Patented Nov. 24, 1814.

Serial No. 760,560.

On the drum-shaft 6 is secured a gear 10 which meshes witha pinion l1 carried'on a shaft 12. A gear 13 on the shaft 12'1neshes with a pinion 14. carried on a shaft 15. On the latter shaft is a sprocket-wheel 16 which is connected by a chain 17 with a sprocketwheel 18 on the crank-shaft 19. The latter shaft is suitably mounted in a bracket 20 secured on the outer side of one of the guide members. and at the outer end of the shaft is carried a removable crank 21 by which the shaft may be turned. Adjacent to the sprocket wheel 18 a brake-wheel 22 is secured on the shaft 19, a brake-band 28 extending around the wheel and having one end connected to the bracket 20 and the other end connected to a lever 24: which is pivoted on the bracket as shown in Figs. 1 and 2. A pin-25 is provided which may be passed through an opening in the bracket 20 into a hole inthe side of the brake-wheel, to prevent rotation thereof and thus lock the actuating mechanism to retain the lifting-heads in elevated position. I Each of the lifting-heads has a flangeportion' 26 extending inwardly from the guide-members 1. and on the upper sides of each of said flange port ons are a pair of conical pins 27. The table or platfo m .28 has at each end thereof a pair of erforate lugs 29 which are spaced so as to adapt them to fit a ound the pins 27 on the flanges of the lifting-heads. Similar lugs 30 are placed at the s de of the platfo m. and a forked tongue 31 is pro ided which mav be detachably engaged with any air of the lugs. caster-wheels 32, and when the same rest u on the floor A and the tongue is engaged withapair of thelugs 29 or 30.as shown in Fig. 4, the platform may he used as a truck for the conveyance of the materials with wh ch it may be loaded.

l/Vhen it is desired to hoist materials carried on the truck, the lifting-heads 9 are moved down to a position near the floor A, and the truck is moved to a position between them so that the lugs 29 are above the pins 27, as shown in Fig. 1. The crank 21 is then turned by hand to operate the drum-shaft and wind the cables 8 upon the drums 7, thus raising the lifting-heads. The flangeportions 26 engage the lower side of the platform 28. the pins 27 passing into the openings in the lugs 29 so that the platform is retained in a proper central relation to the On the bottom of the platform are heads, and the platform is carried up by the heads as indicated by dotted lines in Fig. 1.

When used for handling paper, the hoisting mechanism may be placed adjacent to the feed-table of a press B, as shown by the dotted lines in Fig. 2. The platform with its load of paper is then elevated so that a convenient part of the pile is above the level of the press feed-table, and the desired portion of the pile C is transferred to the table. '1 he platform may then be further elevated, as desired, being held in the successive positions by the use of the pin 25, as described.

When it is desired to lower the platform, either when empty or partially unloaded, the locking-pin 25 is withdrawn from the brake-wl'ieel, the brake-lever 24 is moved to clamp the band 23 around the wheel, and the crank 21 is taken off the shaft 19. The Platform is then allowed to descend by its own weight, the movement being controlled by clamping the brake-hand more or less tightly upon the brake-wheel. Nhen the casterwheels reach the floor A. the lifting-heads 9 continue to move down until they are completely disengaged from they platform, after which the same may be wheeled away and replaced by a loaded platform.

By the use of several of the trucks or wheeled platforms, each adapted to be engaged with the hoisting mechanism, they may be used for storing materials until desired for use. Thus, in a printing establishment, paper as received may be unloaded directly onto one of the wheeled platforms, conveyed thereon to the storage room, left there until the paper is desired for use, then wheeled to the hoisting mechanism, and raised into proximity to the feed-table of the press, all without necessitating the rehandling of the paper.

N ow, having described my invention, what Iclaim and desire to secure by Letters Patcut is:

1. In a device for elevating paper to a printing press, a platform provided with casters so as to be movable upon a floor, projecting vertically perforate lugs at the ends of the platform, a pair of spaced vertical guides disposed adjacent to the feedtahle of a press, heads slidably mounted on said guides, said heads having pins adapted to register with the lugs on the truck when the latter is disposed between the guides, and means for raising and lowering the heads on the guides, said heads being movable downwardly to positions at which the pins will be disengaged from the lugs while the truck-casters rest upon a floor between the guides.

2. In a device for elevating paper to a printing press, a platform provided with casters so as to be movable on a floor, a pair of spaced vertical guides disposed adjacent to the feed-table of a press, liftin heads slidaloly mounted on said guides, said heads having projecting parts extending toward each other and having conical upwardly ex tending pins thereon, projecting lugs at the ends of the platform having openings adapted to fit and be automatically centered upon the conical sins of the lifting-heads, means for simultaneously elevating the liftingheads, and means for retaining the liftingheads at successive elevated positions.

In testimony whereof I have hereunto subscribed my name in the presence of two witnesses.

C. A. SIGAFOOS. Witnesses:

D. O. BARNELL, A. R. MITCHELL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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