US1174361A - Elevator. - Google Patents

Description

W. F. SIMMONS & C. W. LEVY.

ELEVATOR. APPLICATION FILED SEPT- 24, 1915.

1., 174,36 1 Patented Mar. 7, 1916.

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WISE F. SIMMONS AND CHRISTIAN W. LEVY, 0F HUMBLE, TEXAS.

ELEVATOR.

Specification of Letters Patent.

Patented Mar. 7, 1916.

Application filed September 24, 1915. Serial No. 52,379.

county of Harris and State of Texas, have invented certain new and useful Improvements in Elevators, of which the following is a specification.

This invention relates to new and useful improvements in elevators, and has more particular relation to a locking device for securing thejaws of the elevator around the pipe to be lifted. a

In boring the ordinary oil wells the bit is usually secured to the lower end of a pipe which is rotated by the well known rotary and it often becomes necessary to withdraw this pipe from the well for the purpose of removing the drill and replacing the same and for other purposes. The pipe is usually formed of sections connected together by collars, greater in diameter than the diameter of the pipe and when it is desired to elevate the pipe the elevator is secured around it beneath the collar which rests upon the top of the elevator. In lifting a long string of pipe, or in fact,'in lifting a string of any length the latch securing the jaws together around the pipe often is released accidentally with the result that the jaws separate and the string is allowed to drop in the well.

It is the object of this invention to provide a latch which will probably secure the jaws open position and Fig. 6 tion thereof.

together so as to prevent their accidental release.

With the above and other objects in view, the invention hasparticular relation to oer;v tain novel features of construction, operation, and arrangement of parts an example of which is given in this specification and illustrated in the accompanying drawings wherein Figure l is a side elevation of a string of pipe with the elevator secured therearound and showing an end view of the latch, Fig.

2 is a Side elevation thereof showing a side view of the latch, Fig. 3 is a plan view of the elevator showing the pipe in eQtion, Fig. 4 shows a sectional view of the latch, Fig.5 shows a plan view of the elevator in Referring now more particularly to the drawings, wherein like numerals of referunderneath its collar, an extension carrie shows a side eleva-- ence designate similar parts in each of the figures, the numeral 1 refers to the upper pipe section and the numeral 2 to the lower section, said sections being united by the collar 3. The elevator proper is formed of the arcuate jaws 4. and 5 hinged together at 6. The free ends of the jaws have the outward extensions 7 and 8 respectively whose inner sides are plane and fit closely together when the jaws are closed.'

' The inner side of the extension 7 has the catch 9, which is alined with and adapted to project throu h the slot 10 cut through the extension 8. ivoted to the outer end of the extension 8 is the latch 11 and when the elevator jaws are closed around the pipe underneaththe collar 3 the'catch 9 projects through the slot 10 and the latch 11 and engages behind the shoulder 12 of said catch and locks the jaws together around the pipe. The jaw 5 has a notch 13 cut in the upper edge thereof in alinement with the latch 11, inwhich the free end of' said latch rests when the elevator is secured around the pipe, and the collar 3 rests upon said free endof the latch 11 and looks it in engage ment with the catch 9 when the pipe is being lifted and thus secures the jaws together around the pipe and prevents their accidental release while the string is being withdrawn from the well.

' What we claim is:-

1. A device of the character described including a pair of arcuate jaws hinged together at one end and adapted to fit around a pipe underneath its collar, extensions carried by the other ends of said respective jaws which fittogether when the jaws are in closed, position, one of said extensions having'a slot, a catch carried by the other pro ection in alinement with said slot and projecting therethrough when the jaws are in closed position, a latch adapted to engage 2. An elevator including a pair of arcuate jaws "adapted to be secured around a pipe by the free end of each jaw, one of said extensions having a" slot therethrough, a catch carried by the other extension adapted to project through said slot,a latch provided 5 to engage with the catch when the jaws are in closed position, the free end of said latch engaging under said collar and being locked in position thereby.

3. An elevator including a pair of arcuate.

vided with a notch in which the free end of said latch rests, and wherein it is secured by the collar.

In testimony whereof we have signed our names to this specification in the presence of two subscribing witnesses.

WISE F. SIMMONS. CHRISTIAN W. LEVY.

Witnesses:

AQL CARY, J. J. Hmns.

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