US1366746A

US1366746A - Grapple

Info

Publication number: US1366746A
Application number: US390805A
Authority: US
Inventors: Pohl John
Original assignee: Individual
Current assignee: Individual
Priority date: 1920-06-22
Filing date: 1920-06-22
Publication date: 1921-01-25
Anticipated expiration: 1938-01-25

Description

J. P.0HL.

GRAPPLE. 1 APPLICATION FILED JUNE 22, 1920.

1,366,746. Patented Jan. 25,1921.

INVENTUR.

A TTOR/VE Y3.

JOHN IPOHL, 0F BLOOMFILLD, NEW JERSEY.

GRAIE'PLE.

insane.

Specification of Letters Patent.

PatentedJan. 25, 1921.

Application filed June 22, 1920. Serial No. 390,805.

To all whom it may concern:

Be it known that 1, JOHN Form, a citizen of Russia, and a resident of Bloomfield, in the county of Essex and State of New Jersey, have invented new and useful improvements in Grapples, of which the following is a specification.

This invention relates in general to grapples, and more particularly to grapples adapted for use in hoisting and setting finished blocks of stone.

A common method used at the present time for hoisting finished blocks of stone is to drill a pair of inwardly converging holes in the top bed or upper rough surface of the stone and insert a pin in each of the holes, the outer ends of the pins being con nected by chains or ropes to a hoisting ring attached to the derrick or crane.

The objects of the present invention are to provide a grapple which necessitates the drilling of only one hole, thus eliminating the time and labor incident to drilling-the usual second hole; to provide a grapple having a pair of arms one of which fits into a hole in the block to be hoisted. while the other arm bears frictionally upon the top of the block to cause the other arm to frictionally bind in the hole and hold the block thereon; to secure a grapple having a lazy tong operation one end of which carries a pin to engage the hole in the block to be hoisted and an arm frictionally engaging the top of the block, the other end of the grapple being adapted to be connected to a derrick or crane, whereby tension on'the hoisting apparatus and the grapple tends to cause the pin and said arm on the grapple to frictionally engage the block to raise the same; to obtain novel means for preventing the pin from slipping from the hole; to provide means for maintaining the grapple in operative position on the block preparatory toconnecting the grapple to the hoisting apparatus; and to obtain other advantages and results as may be brought out by the following description.

Figure l is a front elevation of a grapple constructed in accordance with my invention showing the same applied to a block of stone or the like;

Fig. 2 is a side elevation;

Fig.3 is a fragmentary side elevation of the foot at the end of one of the links formmg the grapple;

Fig. f is a horizontal sectional view on a nected at intermediate points in their length by a pivot bolt 3, one end of the link 1 being formed with a substantially cylindrical angularly projecting arm 4 extending toward the corresponding end of the link 2, while the said corresponding end of the link 2 is formed with a presser foot 5 pivotally connected to the link at 6 to swing in the plane of the link. This arm 4 of the link 1 may be formed in any suitable manner, but is preferably integral with the link 1, and is of a length sufficient to project beyond the foot 5 of the link 2. The other ends of the

links

1 and 2 are pivotally connected at 7 and 8, respectively, to one end of actuating

links

9 and 10, the opposite ends of which are pivotally connected at 11 to a hoisting ring 12. A. suitable spring 18 is connected be tween the

links

9 and 10 and tends to draw the same together so as to collapse the grapple. Obviously other forms of springs may be utilized and may be connected at other suitable points to accomplish this result.

In the use of the grapple, assuming that it is desired to hoist a block of stone such as designated by the reference character A, an inclined hole B of a diameter substantially equal to that of the arm 4 of the link 1 is drilled in the block A from the upper side thereof, after which the arm a is slipped into the hole B and the grapple extended by swinging the links 1 and 2V apart about the pivot bolt 3 and causing the. presser foot 5 to rest upon the upper surface of the block. The spring 13 operates to hold the grapple in an extended position on the block A, and a hoisting apparatus such as a derrick (not shown) is'connected to the hoistingring 12 as tension is placed upon the hoisting apparatus and the grapple, the

links

1 and 2 tend to swing together so that the foot 5 tightly and frictionally engages the top surface of the block Aand the arm 4 is forced tightly and frictionally against the walls of the hole B. The pressure of the foot 5 upon the stone tends to increase the frictional engagement of the arm 4 with the hole B, and also maintains the hoisting ring 12 centrally disposed between the arm 4 and the foot 5 so as to properly balance the block upon the hoisting apparatus. For the purpose of adjusting the limits of swinging of the

links

1 and 2 upon each other, the links may be provided with. a plurality of holes 14 to receive the pivot bolt 3 when it is desired to change the relative adjustment of the

links

1 and 2.

For the purpose of causing the arm 4: to tightly engage the walls of the hole B as the grapple is being placed in position to prevent the grapple from falling over upon the block before the hoisting apparatus is connected, the arm 1 is preferably made tubular and has the outer end thereof slotted as at 15, a spreading bolt 16 being fitted within the arm 4 and having a wing nut or other adjusting means 17 threaded thereupon and bearing upon the opposite end of the arm 4:. The inner walls of the arm 4 at the outer end thereof are inclined at 18 and cotiperate with a frusto-conical head 19 on the spreading bolt 16 so that as the nut 17 is tightened upon the bolt the slotted end of the arm is spread outwardly against the Walls of the hole B. To prevent turning of the bolt during the adjustment, the threaded end thereof is preferably slotted longitudinally at 20 and receives a pin 21 which passes V transversely of the arm 4, as more clearly shown in Fig. 4.

In the modified form of my invention illustrated by Figs. 5 and 6, the linlr 22 is formed of two spaced and parallel sections which receive between them the other link the arm by a bolt 27, the function of the pin 25 and the bearing foot 26 being the same as that of the arm 4 and bearing foot 5 of the construction shown in Fig. 1. The opposite ends of the

links

22 and 23 have fpivotally connected thereto the

respective rings

28 and 29 which are coupled together by a hoisting'ring 30 corresponding to thering 12. The operation of this form of my invention is substantially identical with that of the construction shown in Figs. 1 and 2, the

rings

28 and 29 performing the same functions as the

actuating links

9 and 10, and the

links

22 and 28 being folded upon each other when tension is placed upon the hoisting ring 30.

It will thus be seen that my invention provides a grapple for hoisting blocks of stone and the like which requires the drilling of only one hole, and which is simple and reliable in construction and operation. The actuating links '9 and 10 may be substituted by chains, cables or other suitable construction, and many other detail modiiications and changes can be made in the construction of my improved grapple without departing from the spirit or scope of the invention; and :while I have illustrated one possible embodiment of the invention, I do not desire to be limited in the use of my invention except as required by the following claims when construed in the light of the prior art.

Having thus described the invention, what I claim is: i r .7 e 1. In a grapple of the character described, the combination of a pair of pivotally connected members, one end of one of which is constructed to fit into a hole formed in one side of an object to be hoisted, while the corresponding end of the other of said members is adapted to frictionally engage the said side of the said object exteriorly of said hole, and means at the opposite ends of said members for connection to a hoisting apparatus. V

2. In a grapple of the character described, the combination of a pair of members pivotally connected at points intermediate their lengths, one end of one of said members being constructed to fit into a hole formed in one side of an object to be hoisted, while the corresponding end of the other member engages the said side of the said object exteriorly of said hole, and means connected to the opposite ends of said members for attachment to a hoisting apparatus, said means drawing the first-mentioned ends of said members together as tension is placed upon said means.

3. In a grapple of the character described,

the combination of a pair of members pivotallv connected at points intermediate their lengths, one end of one of said members being formed with an angularly projecting arm to fit into a hole formed in one side of 'an object to be hoisted at an angle to the surface thereof, while the corresponding end of the other member frictionally engages the'said side of the said object exteriorly of said hole, and means connected to the opposite ends of said members for attachment to a hoisting apparatus, said means drawing the first-mentioned ends of said members together as tensionxis placed upon said means.

4. 'In a grapple of the character described, the combination of a pair of members pivotallv connected at points intermediate their lengths, one end of one of said members being formed with an angularly projecting arm extending inwardly toward the corresponding end of the other of said members and adapted to fit into a hole formed in an object to be hoisted at an angle to the surface thereof, while the corresponding end of the other of said members is provided with a pivotally connected presser foot adapted to engage the said side of the said object adjacent the said hole and exteriorly there of, and means connected at the opposite ends of said members for drawing said first-mentioned ends together.

5. In a grapple of the character described, the combination of a pair of members pivotally connected at points intermediate their lengths, one end of one of said members being formed with an angularly projecting arm to fit into a hole formed in one side of an object to be hoisted, while the corresponding end of the other member engages the said side of the said object adjacent said hole and exteriorly thereof, means for expanding said arm against the walls 01": the hole in said object, and means connected to the opposite ends of said members for drawing the said first-mentioned ends together.

6. In a grapple of the character described, the combination of a pair of members pivotall connected at points intermediate their lengths, one end of one of said members being formed with an angularly projecting tubular arm having one end thereof slotted and its inner walls inwardly inclined from said end, while the corresponding end of the other of said members engages the surface of the said object adjacent said hole, an expanding bolt within said tubular arm and having at one end a frusto-conical head to engage the inclined slotted end of said arm, the opposite end of said bolt being provided with a nut engaging the corresponding end of the said arm, and means connected to the opposite ends of said members for drawing the said first-mentioned ends together.

7. In a grapple of the character described, the combination of a pair of members pivotally connected intermediate their ends, one of said members comprising a pair of spaced and parallel bars while the other of said members comprises a single bar arranged'between said spaced bars, one end of said second-mentioned member having an angnlarly projecting arm adapted to fit into a hole formed in one side of an object to be hoisted, a presser foot pivotally connected between the said spaced bars at the corresponding end of the other of said members and adapted to frictionally engage the said side of the object exteriorly of said hole, and means connected to the other ends of said pivotally connected members for drawing said first-mentioned ends of the members together when tension is exerted on said means.

' 8. In a grapple of the character described, the combination of a pair of members pivotally connected at intermediate points in their lengths, one end of one of said memhere being constructed to fit into a hole formed in an object to be hoisted, while the corresponding end of the other of said members engages the surface of'the said object adjacent said hole, spring means connected between said members and tending to draw thesaid ends thereof together, and means connected at the opposite ends of said members for attachment to a hoisting apparatus, said means forcibly drawing said first-mentioned ends of the said members together as tension is placed on said means.

JOHN POI-IL.