US 1481158 A
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N. K. SMITH- WRENCH CARRIAGE Filed Sept. 1922 Patented .Ham. is. ieaa NELSON K. SMITH, F DALLAS,,TES.
Application filed 8eptember'5, 1922. Serial No. 586,121.
To all whom it may concern:
Be it known that I, NELSON K. SMITH, a citizen of the United States, residing at Dallas, in the county of Dallas and State of Texas, have invented certain new and useful Improvements in Wrench Carriages, of
which the following is a specification.
This invention relates to new and useful improvements in carriages for supporting pipe wrenches on well drilling rotaries.
The invention is in some respects an improvement upon my co-pending application filed Sept. 30, 1921, Serial No. 504,452. The object of the invention is to provide a car- 1 riag'e with means for securely fastening a pipe wrench therein together with a latch or holding said fastening means. A further object is to provide a carriage in which the position of the wrench may be reversed and the wrench fastened or released from the pipe without changing any of the parts of the carriage. Another object,- is to provide means for fastening the wrench in the carriage and arranged to release the wrench in the carriage, whereby said wrench is freed from the pipe and still supported in the carriage. A further object is to mount the jaw of the carriage in such a manner as to compensate for any imperfections in the alinement of the parts, such asthe inclination of the carriage post owing to a worn rotary hole.
- A further object of the invention is to provide fastening means for the wrench I which may be quickly operated to either fasten or release the wrench and which will be ositive in its action.
construction designed to carry out the invention will be hereinafter described to 4 gether with other features of the invention.
The invention will be more readily understood from a reading of the following specification and by reference to the accompanying drawings, in which an example of the invention is shown and wherein:
Fig. l is a perspective view of a carriage constructed in accordance with my invention and in position on the platform of a rotary and showing the wrench in engagement with a drill pipe.
Fig.- 2 is an elevation of the carriage, .portions being illustrated in sections,
Fig. 3 is a plan view,
Fig. 4 is a cross sectional view of the jaw, and
Fig. 5 is a detail of the jaw mounted.
In the drawings the numeral 10 designates a vertical standard or post which is preferiably cylindrical and has its upper end telescoping into a carriage sleeve 11. The sleeve is provided with an annular chamber 12 contiguous to the post and provided with diametrically opposite openings 18, which register with a diametrical opening 1 1 in the post 10 when the carriage is depressed. A to pin 15 may be inserted thru one of the openings 13 into the opening 14 and is of such length as to be confined within the chamber 12. This pin limits the upward and downward movement of the sleeve when it is en- 7e gaged by the ends of said chamber. A collar 16 is confined on the post by a set screw 17 and a coiled spring 18 surrounding the post has its lower end seated in the upper side of the collar, while its upper end supports thesleeve 11. The spring is of such tension as to normally displac the sleeve 11 to the upper limit of its movement, in which position its upper end is substantially flush with the upper end of the post 10, as
is shown in Fig. 2. It will be seen that the carriage sleeve is thus resiliently sustained and may bedepressed when necessary.
A jaw 19 is provided with a transverse depending shank 20 which is fastened to ears 21 on each side of the upper end of the sleeve b means of bolts 22. The shank is provide with elongated slots 23 thru which the bolts pass and these slots permit a rela tive vertical movement of the jaw so that the latter may have a limited swinging movement when necessary to compensate for tilting of the post 10. The rear side of the jaw is notched out at 24 so as to provide clearance for the post when the carriage is depressed.
.The handle A of a wrench is inserted in the jaw and such wrench is provided with notches B as is shown in Fig. 4. Disks 25 are rotatably confined in the upper and lower portions of the jaw and are connected by an integral pin 26 ecoentrically' mounted im, said disks. The pin is disposed in the slot 'of the jaw and is adapted to be swung into one of the notches B to hold the wrench in position. p
Ontop of --the jaw a hand lever 28 is fastened to the upper disk 25 and is provided with an upwardly bent handle 29 and an angular head 30; A pair of stop lugs 31 are mounted on the rear portion of the jaw on each side of the notch 24. A shaft 32 passes thru' said lugs and is fastened by cotter pins 33. When the lever 28 is swung its angular head 30 is brought into engagement with one of the lugs and limits the swinging movement of said lever in that direction. A latch 34 has its end slotted and straddling the lugs so that the shaft 32 passes thru its slotted end and the latch is thus hinged'into position. The latch is provided with a depending finger 35 and the adjacent side 36 of the head is beveled or out under to conform the said finger, so that when the latch is swung down the finger engages said side 36 and prevents swinging of the lever in the opposite direction.
When the handle A of the wrench, such as is shown in my copending application Serial No. 586,122, is inserted in the jaw 19, the lever 28 has been previously swung so that the pin 26 is in its outward position. When the handle is in position and the wrench engaged with the pipe, the lever is swung so that the in enters one of the notches B and when the table C is rotated the engagement between the notch and the pin become rigid. To release the bite of the wrench on the pipe it is merely necessary to throw up the latch 34, as the pressure of the handle against the in will rotate the same outwardly, thus freeing the wrench from the ipe. This movement of the pin, however, 1s not sufiicient to swingthe pin entirely out of the notch and if the handle is to be withdrawn from the jaw the lever 28 must be swun to move the pin to its outward limit. Angu ar walls 27 are providedat the rear of the jaw to permit the-jaw or the handle A to swim laterally.
It wi 1 be seen that when the latch is in position the lever 28 is held against movement and the pin 26 cannot swing in either direction, the wrench A thus being held in position although iiris free to swing to a limited degree 1n the jaw. When it is desired to reverse the wrench it is also necessary to reverse the latching mechanism and therefore one of the pins 33 is removed and the latch inserted on the other lug 31 so as to be engaged by the head 30 which is suitably shaped to carry out its functions. It
' will be seen that by swinging the latch 34 upward and grasping the handle 29 the lever 28 maybe quickly swung to bring the pin 26 out'of the notch B so that the wrench may be easily removed or inserted in the jaw. There are no pins or bolts to be lost and the device is simple and substantial. If the pipe should fall or the wrench in any memes other way be carried downward the spring 18 will yield and prevent breakage. When the wrench is not in use the jaw ma be swung to one side and when swung ack again will bring the wrench into proper position for fastening on the pipe.
Various changes in the size and shape of the parts as well as alterations and fnodificationsmay be made within the scope of the appended claims.
What I claim, is: I
1.; In a rotary well carriage, the combination of a post, a carriage member slidable vertically on the post and resiliently sustained, means for fastening a pipe wrench to the carriage member, and a latch for holding the fastening means.
2. In a rotary well carriage, the combination of a post adapted to be supported in a rotary table, a carriage member mounted on the post and having a jaw arranged to receive a pipe wrench, a fastening'element adapted to engage the wrench within the jaw, and means for moving the fastening element into position.
' 3.. In a rotary well carriage, the combination of a post adapted to be supported in a rotary table, a carriage member mounted on the post and having a jaw arranged to receive a pipe wrench, a fastening element adapted to engage the wrench Within the jaw, and a latch for fastening said last named means against operation.
4. In a rotary 'well carriage the combination of asupport, a jaw mounted on the support and adapted to receive the handle of a wrench, a fastening device carried in the jaw and adapted to be engaged by a wrench handle, and a latch mounted on the jaw and engaging the fastening device and arranged to release the fastening device when disengaged therefrom, whereby said wrench handle may displace said fastening device to freethe wrench from the ipe.
5. In a rotary well carriage,t e combination of a post adapted to be mounted on a rotary table, a sleeve mounted on the post, a jaw offset laterally from the sleeve and havin an opening for receiving a pipe wrenc fastening means in the jaw for engaging the pipe wrench, and a latch. for holding the fastenin means.
6. In a rotary we-l carriage, the combination of a post, a sleeve mounted to slide vertically on the post, a coiled spring surroundin. the post and supportin the sleeve, 21 latera ly offset jaw connects with "the sleeve, a fastening element carried by the jaw for engaging a pipe wrench, means for operating the fastening element, and a latch for locking said operating means.
7. In a rotary well carriage, the combina tion of a post, a sleeve mounted on the 0st, a jaw, a'connection between the jaw an the said sleeve permitting an independent adjustment of said parts, and means for fastening a pipe wrench in the jaw.
S. In a rotary well carriage, a post, a sleeve mounted on the post, a horizontal jaw carried by the sleeve, a fastening pin in the jaw, means for moving said pin transversely of said jaw, and a latch for holding said moving means against operation.
9. In a rotary well carriage, a post, a sleeve mounted on the post, a horizontal jaw carried by the sleeve, an eccentric element rotatable in the jaw, a wrench fastening pin carried by the eccentric element, a lever for rotating the element, and means for holding the lever against operation.
10. In a rotary well carriage, a post, a
sleeve mounted on the post, a horizontal jaw carried by the sleeve, an eccentric element rotatable in the jaw, a wrench fastening pin carried by the eccentric element, a lever for rotating the element, and a latch carried by theh'ead mounted to swing into the path of the lever to hold the same against operating the element.
11. In a rotary we'll carriage, a post, a sleeve mounted thereon, a jaw having a shank pivoted to the sleeve, an eccentric rotatable in the jaw, a pin carried by the eccentric and exposed in the opening of the jaw, a lever attached to the eccentric, a head on the lever, a latch pivoted on the jaw, and a finger carried by the latch in position to be engaged by the head.
In testimony whereof I aflix my si nature.
- NELSON K. S TH.