US1171580A

US1171580A - Lifting device for hollow blocks.

Info

Publication number: US1171580A
Application number: US55248710A
Authority: US
Inventors: Grosvenor Atterbury
Original assignee: Individual
Current assignee: Individual
Priority date: 1910-03-31
Filing date: 1910-03-31
Publication date: 1916-02-15
Anticipated expiration: 1933-02-15

Description

G. ATTERBURY.

LIFTING DEVICE FOR HOLLOW BLOCKS,

APPLICATION FILED MAR. 31. 1910.

1 1 '7 1 ,5 8O Patented Feb. 15, 1916.

/ M QmsvE/mHrrmm/RY. M flggljaftc wmm S THE COLUMBIA PLANOGRAPH co. WASHINGTON, D. c.

. TED STATES PATENT. OFFICE.

" GBOSVENOR ATTERBURY, OF NEW YORK, N. Y.

To all whom it may concern: 7

Be it known that I, GRosvENoR A'r'rnn- BURY, a citizen of the United States, residing in the city,county, and State of New York, have invented certain new and useful Improvements in Lifting Devices for Hollow Blocks, of which the following is a full and complete disclosure.

-My invention relates particularly to lifting devices for blocks made of cement or cementitious material, of large size, and the object of my invention is to produce a device which, while being simple and not liable to get out of'order, will engage and lift hollow blocks without damaging the blocks, even though the blocks be'not thoroughly set or hardened, and which will be to a large extent automatic 1n operatlonand require but little attentionfrom the operator, and operate entirely in' the interior of being in section. Fig. 2 is a side elevation of the lower portion of the lifting device shown in .Fig. 1. Fig. 3 is a sectional view taken on the line 33 of Fig. 2. Fig. 4. is a plan view of the centering device shown in Fig.- 1. Fig. 5 is a side elevation of a modified lifting device with the block and centering piece in section. Fig. 6 is a side elevation showing two lifting devices, as shown in Fig. 5, arranged to simultaneously lift two hollow blocks or one large block with two hollow spaces. The blocks and portions of the lifting mechanism are shown in section. V

Referring in detail to the modification shown in Figs. 1, 2, 3 and 4, the numeral 1 designates a block to be lifted, which is hollow, and has oppositely disposedrecesses 2 cast in its interiorwalls-at the bottom. The lifting device comprisesside members 3,

Specification of Letters Ifatent.

joined at their upper ends bya pivot 4, and connecting at their lower ends with the slldes 5 and 6. These members 5 and 6 are of substantial width, and in connection with right position. The links 81 serve to connect the intermediate portions of the members 3 with the lower end ofthe member 82. To the upper end of the latter there is attached the lifting chain 8, terminating at its upper end in the lifting ring -9. The chain 10 which is connected to the members 3 at their upper end bythe pivot pin 4, is for use in lowering the device into the block. When the lifting device is lifted through the chain 8, the first result is to pull up the links 31 and thrust the side members carrying. the slides 5 and 6 outwardly, so that they will enter the recesses in the lower end of the block and act as supports for the same. When the chain 10 is in use for lowerin'g the deviceinto a block, the force of gravity acting through the side members 3, and especially. through the member 32 U Patented Feb. 15, 1916. Application filed March 31, 1910. Serial No. 552,487. i

.ing device, adapted to support it in an up.-

closes the device so that it may be lowered 1 into the block or withdrawn therefrom. At-

tachedto the side members 3 are spring guides 3 which aid in centering the lifting device particularly while it is being expandfinding device comprising a top plate 11 and guides l2'is arranged to slide on the lifting 'chain 8. Theobject of this centering device -.is to automatlcally center the lower end of thelifting device when itis lowered into a block, so that themembers 5 and 6 will register with'the recesses 2, and by centering the chain in the interior of the block to keep the block steady and in a vertical position while, suspended. In order that this center ing device may be used with blocks having ,openingsof different-sizes, the members 12 are made adjustable, by shifting the bolts 7 areconnected at theirupper ends by the links 17. These links are connected at their inner ends by the pin 18, adapted to slide vertically in the slot 19. A lowering chain more useful in this particular apparatus as the hooks 22 are more likelyto engage accldental roughnesses upon the interior of the block. There is also a lifting chain 21 attached at its lower end to the pin 18. There.

is also provided a centering device the same as that described IIZLCOHIIGCtlOIl wlth Fig. 1.

'l Jith this. arrangement, when the device is being lowered into the block by means of chain 20, the force of gravity will cause the members 14 to hang vertically, so that they pass readily into the block, but when the device has been lowered and the block is ready to be lifted, and the pull is on the chain 21, the lower ends of the side members 14: are thrust outwardly by the pull on the links 17, and the hooks 22 are forced into the recessesx2, and'firmly engage the block.

In Fig. 6, where the device of Fig. 5 is shownin duplicate applied to lift two blocks at the same time, or one large block having two recesses, there is provided a spacing member 2% adapted to hold the lifting devices at a predetermined distance from each other. This spacing member is made in two parts connected by bolts, and its length may be adjusted by shifting the bolts into the holes 26. This double lifting device is also useful where blocks are cast with a plurality of hollow spaces.

The lifting device shown in Fig. 5 is adjustable to operate with openings of different size, by shifting the pins 16 to the holes 27, and "by shifting the pin 18 to the holes 29, or by making either of these changes. The operation of my improved lifting device is obvious from the foregoing description. In the case of that form shown in Fig. l the operator attaches the lifting hook 30 to the ring 9 at the upper end of the lowering chain and the device is readily 'loweredinto' the block. The ring 9 is then disengaged and the ring 9 en" gaged, and a pull on the lifting chain 8 opens the side members 3 and forces the slides 5 and 6 into the recesses 2. The block is then lifted to its desired position and the ring 9 is disengaged and the ring 9 engaged ,so that the lifting device may be withdrawn from the block. The same is true of the modification shown .in Fig. 6,

except that the hooks 23 and 23 take the place of the rings 9 and 9?, and are used alternately 1n the same manner, according to whether thedevice is being lowered into the block or is intended'to engage and lift;

the block.

In the apparatus. shown in Fig.5 the change from lowering chain to lifting chain is accomplished bymeans of rod- 24. At

25 and 25: so thatthe change from one chain to the other may be made by sliding lieving the operator of the weight of the chains while making the change.

While I have described only two modifications of my invention, 1 am aware that '70 each end'of rod '24: there are formed hooks.

rod 24: over the lifting hookBQ, thus re-,

numerous other modifications may be made those skilled in the art without departmg from the spirit of my invention, and 11' Wish to secure protection for all such modiiications as come within the scope of my claims.

What I claim. is: 1. A lifting device adapted for use with a hollow blocs, having.oppositely disposed recesses near its lowerfend;comprising pivoted members, lowering means adapted' to.

maintain the lifting device in a closed position,- lifting means adapted to open said pivoted members and cause them to enter the recesses of said block, centering devicessecured to said lifting means and a centering and finding device for said lifting means in.- dependent'thereof and' adapted to engage the upper end. of the block substantially as described.

2. In combination with a lifting device adapted for use with a hollow block having oppositely disposed recesses near itsv lower end, said lifting device being adapted.

to enter said recesses of said block, a finding device independent of the lifting device and adapted to engage the upper end of the block to thereby center the lifting device in the block and steady the block during the 4-. In combination with'a lifting" device,

adapted for use with a hollow block, havingopposit'ely disposed recesses near its lower end, a centering and finding device independent of the liftingdevice' and comprising a top plate and guides so arranged as to automatically center the said lifting device when it is lowered into the blocks so that the lifting device will register with the. recesses and to automaticallysteadythe block during the lifting operation 5. In combination with a lifting device adapted for use with a hollow block having top plate, whereby said centering device oppositely-disposed recesses near its lower may be used with blocks having openings end, a centering and finding device indeof different sizes.

pendent of the lifting device and adapted GROSVENOR ATTERBURY. to guide and control the same comprising Witnesses:

a top plate and guides, the said guides be- WALTER MEAOHAM,

ing adjustable in radial recesses in said RAMSY HOGART.

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

Washington, I). 0.