US1423971A

US1423971A - Hoisting apparatus

Info

Publication number: US1423971A
Application number: US500888A
Authority: US
Inventors: Curtis E Smith
Original assignee: Individual
Current assignee: Individual
Priority date: 1921-09-15
Filing date: 1921-09-15
Publication date: 1922-07-25
Anticipated expiration: 1939-07-25

Description

C. E. SMITH. H 0|STING APPARATUS.

APPLICATION FILED SEPT. 15,192I.

Patented July 25, 192 2.

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C. E. SMITH.

HOISTING APPARATUS. APPLICATION FILED SEPT-15,1921.

1 123,971 I Patnted July 25, 1922.

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c. E. SMITH.

HOISTING APPARATUS.

APPLICATION FILED SEPT. 15,1921.

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STATES earner arica.

CURTIS E. SMITH, OF ST. JOSEPH, MISSOURI.

HOISTING APPARATUS.

Specification of Letters Patent.

u Application filed September 15,1921. Serial No 500,888.

To aZZ wa m, it may concern:

Be it known that I. Cunrrs E. Sirrrrr, a citizen of the United States, residing at St. Joseph, in the county of Buchanan and State of Missouri, have invented certain new and useful Improvements in Hoisting Apparatus, of which the following is a specification.

This invention relates to hoisting apparatus and more especially to that class of hoisting apparatus used for hoisting and supporting long pieces of material for the purpose of sawing or working upon them in any Way.

An object of this invention is to provide an apparatus by which a relatively long piece of timber or other. material can be elerated by one person at one operation and seprovide a hoisting apparatus by which either end of the piece of material or thematerial as a whole can be raised at one time at the option of the operator.

These and other objects and advantages will be obvious from the following description taken in connection with the accompanying drawings in which is embodied a preferred form of my invention.

In the drawings:

Figure l is a side elevation of the device as a whole. i

Fig. 2 is an end elevation of that part of the device marked A.

Fig. is an inside elevation of that part of the device marked B. v

Fig. at is a perspective view of theload carrier associated with part B. V

Fig. 5 is a sectional'view of the handle used for operating and holding the load clamping cable.

Fig. 6 is an end elevation of a modified form of the support shown in Fig. 2.

, Fig. 7 is an end elevation of a modified form of the support shown in Fig. 3.

Figs. 8 and 9 are plan views of the saw supporting platform shown in Fig. 7

The device is composed of two upright .framelike members A and B held in suitable spaced relation to each other. The

frame A is rectangular in structure having a base part 1,

upright parts

2 and 3 and a horizontal part 4-. Extending from the part 2 to the base 1 are brace members 5 and 6 to give rigidity to the frame A. -The frame is further braced by means of a member 7 extending from the brace 6 to the base 1.

Slidably mounted upon the upright 2 is a load carrying member 8 having a load engaging part 9 and a guide means 10 engaging the

uprights

2 and 3 to prevent the load carrying means from turning. Suitably attached to the load carrying member is'a cable 11 which passesover a pulley 12 on the upper end of the upright 2. The, cable 11 passes under a pulley on the frame Bdheree inafter described.

The, fame B consists of a base 17 and an upright 18, properly braced in relation to each other by means of abrace19. Theupright 18 consists of twofsection's, a lower one 20, attached to the base 17 and -an upper one 21, suitably attached, to the lower section when the device is to be used tohoisttimber.

Attached to section 20 is a bracket on which is mounted a pulley 23; A. second bracket member 21', carryingapulley'2 l, is

attached to the upperend of the upright as shown in Fig. 3. p j

The

pulleys

23 and 24; are adapted to re-v ceive and-guide the cable 11 substantially vertically after said cable has been directed diagonally downward from pulley 12'. A second load carrying member 25 on the support B is slidable on that portion of the cable which is entrained between pulleys 23 and 24c, and is adapted to be adjustably clamped to any point along said portion of the cable as may be desired.

Patented July 25, 1%22.

, The load carrying memberzor claw 25 comprises'a load engaging part-or rest 26 in the shape of a triangular prism ha'ving a longi tudinal side edge of its base integrally con nected with a flat upright member of substantially the same width as the'rest 26, and

projecting outwardly from one face of the upright member, The upper end of the member 25 is provided with a right angular extension 27 projecting from the opposite face of the upright member.- Securely mounted in a vertical position is a threaded stud 29 engaged by a winged nut 29.

The cable 11, directed from pulley 23, is passed through a perforation 28 in the extension 2-7 and looped around the threaded stud after the load ngaging member 25 has been located at the desired height. The winged nut 29 is then screwed down tight upon the cable for locking the cable to the load engaging member.

In order to secure the free end of the cable 11 in position to maintain the load at a predetermined height, I have provided a. clamping device for this purpose on the load carrying member 25. The clamping device comprises a grooved wheel 30 mounted 1n the forked end of a threaded shank 31, upon which is adapted to be screwed a handle 31. The forked end is pivotally mounted on the rest 26, and is held against rotation in one direction by means of a pawl and ratchet mechanism 32. The grooved wheel and the 'lork'ed end of the shank are rotatedby actuation of the handle 31.

The free end of the cable is directed downwardly frompulley 2 1 wound around the grooved wheel 30 inserted between the wheel and fork, then looped around the threaded shank 31. The handle is then screwed down tight on the cable whereby said cable is made last to the load carrying member. The ratchet mechanism 82 holds the clamp in position.

The cable 11, when so clamped near its free end, holds the load in close association with the load carrying member.

lVhen so desired a short length of cable 11" is looped over or clamped by the nut 29, wound on the grooved roller 30, and clamped by the handle 31 in a manner similar to the clamping of the end of cable 11 for independently holding the load on the load carrying member 25.

The claw or load carrying member 8 is identical in construction to the claw 25.

The operation of the device thus'described is as follows One end of a piece of timber is placed on the claw 8 and supported by the load engaging part 9. The other end of the timber is supported by the claw 25. A pull on cable 11 will raise both ends simultaneously by reason of the position of the various pulleys and the weaving of the cable on the pulleys.

If, at any time, the end of the timber which is carried by the support is raised at too great a height, the nut 29 may be loosened slightly when that end of the timber will lower under its own weight since the claw 25 is slidable on the cable 11, the cable sliding through the perforation 28 in the extension 27 of the claw.

By releasing the cable from nut 29 of claw 25, the end of the timber carried by support A may be elevated alone, or by securing said end of the timber against'movement, the end carried by support 13, when the cable is engaged by the nut 25, is elevated solely by a pull on the free end of the cable. Any

v position of the timber may be maintained by locking the free end of the cable 11 to the handle 31 on claw In this position, the timber may be operated on by any suitable tool actuated manually or mechanically.

In the construction disclosed by Figs. 6 to 9, inclusive, certain elements of Figs. 1 to 5, inclusive, are sufficiently modified to cause the device to move a timber horizontally instead of vertically.

To the support A, shown in Fig. 2, is secured the table 13 comprising a horizontal member 15 with the leg 1 1-, shown in F 6, to provide a horizontal support for a timber end. A pulley 16 is rotatably mounted on the upright 2 in alinement with the horizontal member 15 and over which the cable 11 is entrained after being directed from its connection with the claw 8. The cable is then directed over pulley 12, and then diagonally downward to the pulley 28 on the bracket 22" of the standard 20.

In the support B of Fig. 7, the upright 21 is omitted and a table is supported by the bracket 22 mounted on the standard 20.

The table 84- is carried by L-shaped brackets .35 having a slot 38 through which is passed a bolt for adjust-ably securing the table to the bracket. The bracket is also perforated at 36 and 37, for the reception of securing means iorattaching the brackets at the point of juncture of the two sections of the bracket to the upright.

It bracket 21, mounted on bracket 22, carries the pulley 2st over which the cable 11 is directed from pulley 23 to the claw located in a horizontal position. The claw 25 is similarly constructed to the claw of Fig.

Upon the table 3 1 is a saw 33 for cutting the end of the timber carried by the supportB.

As shown in Figs. 6 and 7, the timber is maintained in horizontal position by the spaced tables. The ends of said timber being engaged. by the claws 8 and 25, are moved simultaneously in a direction towards the saw by a pull on the cable 11 which is clamped to the claw 25 by the nut 29.

The device zulapted as a whole to be used in connection with a saw for sawing the ends of a piece of timber, a pull on the cable drawing the end 01" the timber towards the saw. The lever 31 and grooved wheel 30 provide for a line adjustment of the timber towards the saw,since a release of the pawl and ratchet mechanism will permit of a slight rotation of the lever and wheel to slightly release the load to properly position the timber against the saw preparatory to sawing the timber. A steady pull on the free enclof the cable will cause the timber to move readily towards the saw whereby the timber will be cut desired.

In practice the upright'18 may be omitted altogether and the

brackets

21 and 22 attached to any suitable support, as the side cable moving both ends of the load of a wall, a tree, or any other convenient obect.

Having thus described a preferred embodiment of my device and how it operates and may be used, what I claim as myinvention and desire to secure by Letters Patent, 1s-

1. In a device of the class described, spaced supports provided with pulleys over which a cable is entrained, the cable being directed diagonally downward from the top of one support to the lower portion of the other support, then to the top of said support, the free ends of the cable being directed away from the tops of the supports, a load carrying member on one end of the cable adapted to engage one end of a load, and a second load carrying member connected to the cable intermediate its ends, adapted to engage the other end of the load, said simultaneously when one end of the load is moved in a predetermined direction.

2..In a hoisting apparatus, spaced'supports provided with pulleys over which a cable is entrained, the cable being directed diagonally downward from the top of one support to the lower portionof the other support, then to the top of said support, the free ends of the cable depending from the tops of the supports, a claw secured to one end of the cable dependingfrom a support and adapted to support one end of a timber, and a claw adjustably secured to the cable intermediate its ends and supported by the cable intermediate the top and bottom of the other support.

3. Ina hoisting apparatus, spaced supportsprovided with pulleys over which a cable is entrained, the cable being directed diagonally downward from the top of one support to the lower portion of the other support, then to the top of said support, the free ends of the cable depending from the tops of the supports, and-a load carrying member fixed to the free end of the cable carried by a support, and, a second load carrying member slidable on that portion of the cable carried by the other support and adapted to be adjustably secured to said cable.

4:. In a hoisting apparatus, spaced supports provided with pulleys over which a cable is entrained, the cable being directed diagonally downward from the top of one support to the lower portion of the other support, then to the top of said support, the free ends of the cable depending from the tops of the supports, a load carrying member fixed to the free end of the cable carried by one support, a second load'carrying member slidable on that portion of the cable carried by the other support and adapted to be adjustably secured to said cable, and means for securingthe free end 01": the cable, to the second load carrying member for maintaining the load in a predetermined position.

5. In a hoisting apparatus, spaced supports provided with pulleys over which a cable is entrained, the cable passing diagonally downward from the top of one support to the lower portion of the other support, then to the top of said support, the free ends of the cable depending from the tops ofthe supports, a load carrying member fixed to the free end of the cable carried by one support, a second load carrying member slidable on that portion of the cable carried by the othersupport and adapted to be adjustably secured to said cable, and means for securing the free end of the cable to the second load carrying member for maintaining the load in a predetermined p0- sition, said securing means being movable whereby the load may be slightly shifted.

- 6. In a hoisting apparatus, spaced sup ports provided with pulleys over which a cable is entrained, the cable passing diagonally downward from the top of one support to the lower portion of the other support, then to the top of said support, the free ends of the cable depending from the tops of the supports, and a load carrying member fixed to a free end of the cable carried by one support, and a second load carrying member slidable on the cable carried by the other support and adapted to be adjustably secured to said cable, the other free end of the cable adapted to be secured to the second load carrying member in'embracing relation with the ,load to retain the load on the said load carrying member and like wise to maintain the load in a predetermined position.

In testimony whereof I afiix my si ature.

CURTIS E. S TH.