US1343158A - Machine for threading pipes - Google Patents

Description

J. A. REESE.

MACHINE FOR EHREADING PIPES.

APPLICATION FILED APR.26, 1919.

Patented June 8, 1920.

3 SHE ETSSHEET I.

J. A. REESE. MACHXNE FOB THREADING PIPES. APPLICATION FILED APR.26| 191-9.

Patented June 8, 1920.

3 SHEETS-SHEET 3- JAMES AFREESE, 0F BLYTHEVILLE, ARKANSAS, ASSIGNOR TO AMERICAN PIPE MACHINE COMPANY, TOM B. LAIBD, TRUSTEE, A TRUST ESTATE.

MACHINE F 33,- THR-EADING PIPES.

, Application filed April 26,

To all whom it may concern:

Be it known that I, JAMES A. REEsE, a citizen of the United States, residing at Blytheville, in the county of Mississippi and State of Arkansas, have invented a new and useful Machine for Threading Fipes, of which the following is a specification.

This invention relates to a portable machine for use in cutting threads on pipes of different kinds, it being adapted to use an ordinary hand die, there being motor driven mechanism for actuating the die either to cut the thread or to unscrew it from the threaded pipe.

A further object is to provide reversible mechanism which is constantly under the control of the operator and which acts automatically to stop the threading operation when the desired number of threads have been cut, and to immediately thereafter autornatically reverse the operation of the die so as to disengage it from the pipe.

With the foregoing and other objects in view, which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, itbeing understood, within the scope of what is claimed, changes in the precise embodiment of the invention shown can be made without departing from the spirit of the invention. a

In the accompanying drawings the preferred form of the invention has 7 been shown.

In said drawings:

Figure 1 isa plan view ofthe machine, portions of the base being broken away.

Fig. 2 is a side elevation, the motor being removed.

Fig. 3 is a section on line 33 Fig. 1.

Fig. 4 is a section on line 4-4 Fig. 1.

Fig. 5 is a section on line 5-5 Fig. 2.

Referring to the figures by characters of reference 1 designates a base on which are mounted near the sides and adjacent one end, standards 2 and 3 each of which is provided with a recess 1 in its upper end and with an arched cap 5 which is pivotally connected to the standard and is held in place by a bolt 6 extending into a slot 7 in the cap. A set screw 7 is mounted in each cap and the two set screws are adapted to clamp upon the oppositely extending arms 8 of a hand die 9 which is of the usual well known construction. As shown Specification of Letters Patent.

D Patented June 8, 1920.

Serial No. 292,785.

this hand die is provided with the radially disposed cutters 10, a slidable member 11 having guide pins 12 sliding in the die 9, a pipe receiving tube 18 provided with binding screws li for gripping the pipe P, and a gear 15 upon the tube or sleeve 13 meshing with and adapted to be driven by a small gear 16 secured to a key 17 which is slida'oly mounted in the die 9. This key has an angular head 18 and the mechanism described operates in the usual manner. In other words by rotating the key 17 the gear 16 will rotate gear 15 and tube or sleeve 13, thus causing the pipe P to be rotated between the cutters 10 and to be threaded thereby. As the pipe is threaded it is gradually fed forward the key 17 at this time sliding forwardly within the die 9. pin 12 alsoslides within the die during the operation as will be obvious. As before stated the construction and operation. of this hand die constitute, in itself, no part of the present invention but said die is of a well known type for general use.

Mounted on the base 1 is a motor 19 provided with a gear 20 meshing with and adapted to actuate a larger gear 21. This gear is mounted for rotation on a stud 22 extending from a standard 23 and a small gear 24 rotates on said stud with the gear 21 and meshes with a larger gear 25. Gear 25 is secured to a shaft 26 which is journaled in the standard 23 and also .in a bearing 2'? and secured to this shaft and between the standard and bearing is a gear 28 meshim with an idler gear 29 which, in turn, meshes with a gear 30 secured to a longitudinal shaft 31. Another longitudinal shaft 32 is journaled in said standard and bearing and is provided with. a gear 33 W1 ich laps but does not mesh with the gear 30. A yoke 34 is pivotally mounted between the standard 23 and the bearing 27 and carries two gears 35 and 36 arranged side by side and rotating together. The gear 35 is adapted to mesh with the gear 33 while the gear 36 is adapted to mesh with. the gear 28. Yoke 3 1- has a handle 37 and is also provided with a dog 38 adapted to engage notches in a holding member 39 upstanding from the base. When the dog is in one of the notches the gears 35 and 36 are held in mesh with the gears 33 and 28 respectively. When, however, the yoke 34 is moved downwardly, these two gears 35 and 36 are shifted out of mesh with the gears The 33 and 28. In this manner the transmission of motion from the shaft 26 to the shaft 32 can be controlled;

Mounted on the base 1 is a standard 40 and the shaft 31 is journaled' therein and has a clutch member 41 feathered on the shaft, this clutch member being provided with an angular groove 42. A gear 43 is loosely mounted on this shaft 31 and is also provided with a clutch member 44.

The shaft 32 has a tubular extension 45 adapted to rotate therewith and a clutch member 46 is provided at one end of this tubular portion. A shaft section 47 is journaled in the bearing40 and projects at one end into the tubular extension 45 and is adapted to rotate therein. A gear 48 is secured to this shaft section 47 and meshes with the gear 43. A clutch member 49 is feathered on the shaft section 47 and has an annular groove 50. This clutch member is adapted to be shifted into or out of engagement with the clutch member 46, thus to couple the shaft section 47 and to uncouple it from the tubular extension and shaft 32.

The shaft section 47 is spaced from but alined with the key 17 of the hand die and feathered on the shaft section 47 is a coupling sleeve 54 having angular opening in one end adapted to receive the angular head 18 of the key when the sleeve is shifted longitudinally toward the hand die. The parts have been shown coupled together in Fig. 1.

Slidably mounted in the bearing 40 and in the bearing 27 is a rod .55 to which is secured a collar 56. A spring 57 is mounted on this rod and bears at one end against the collar 56 and atits other end against the bearing 40. To this rod. is secured an arm 58 the upper end of which is forked as shown at 59 and is seated in the groove 42 in the clutch member 41. Another rod 60 is slidably mounted in the bearings 40 and 27 and has a spring 61 thereon hearing at one end againstthe bearing 40 and at its other end against a collar 62 on the rod. o this rod is secured an arm 63 provided at its upper end with a fork 64 which is seated in the groove 56 in clutch member 49. A finger 65 extends laterally from the arm 63 and laps the arm 58.

Abraeket 66 is located below the arms 58 and 63 and slidably mounted in this bracket is a yieldin 'ly supported latch bolt 67 adapted, when in normal position, to have its upper end in the path of or in engage ment with the lower end of the arm 63, said upper end. of the bolt being beveled as shown. A bell crank l ver 68 is tiltably mounted on the bracket and one arm of this lever engages the bolt 67 while the other arm thereof is connected to a rod 69 pivoted to and supported by a link 70. A finger 71 is secured to the rod 69 and projects into the path of one of the pins 12 of the hand die; A- rod 72 is slidably mounted inthe bracket 66 and has a finger 73 projecting therefrom and adapted to thrust against the lower arm of the arm 58. The rod 72 is connected at one end to a lever 74 and the other end of this lever is connected to a rod 7 5 which is extended across one side of the hand die and through a' guide-gear 76 extending from the bearing2. A finger 7'7 is provided on this rod 75 and projectsinto the path of the slidable member of the hand die as shown particularly in Fig. 1. An operating lever 78 is pivotally mountedonthe bearing standard 2 and is connected to the rod 60.

his to be understood that, under normal conditions the arm 63 is disengaged from the latch bolt 67 and the springs 57 and 61 hold the arms 58 and 63 shifted toward the hand die with the result that the clutch members 41 and 44 are thus in engagement with each other while the clutch members 46 and 49 are out of engagement. After the hand die has been adjusted intoposition and the end of a pipe .1 has been secured in the hand die by the clamping screws 14, the sleeve 54 is shifted longitudinally into engagement with the head 18 of the key of the hand die. When the motor 19 is started motion will be transmitted therefrom through the gears to the shafts 32 and 31 but as shaft 32 is normally uncoupled from shaft 47 and the pressure of the hand die against the finger 77 transmitted through lever 74 and rod 55 holds theclutch member 7 41 normally disengaged from clutch member 44, it will be obvious that during the operation of the motor the two gears 43 and 48 will'not be actuated. By shifting lever 78 the rod 60 will thrust arm 63 along shaft 47 so as to cause the clutch member 49 to engage clutch member 45 and thus couple the shaft section 47 to the shaft 32. the same time finger 65 will move against the arm 58 and holdthe clutch member 41 out of engagement with the clutch member 44. The parts will be held in these positions by the latch bolt 67 over which the arm. 63 will snap when pushed to the position men tioned. As soon as the parts have thus been shifted motion will be transmitted through the drivingmechanism to the shaft section 47 and key head 18 will be caused to rotate, thus feeding the pipe P into the die and causing it to be threaded. After a. predetermined number of threads have been cut on this pipe, one of the pins 12 will come against the finger 71 and thrust the rod 69 longitudinally so as to operate the bell crank lever 68 and depress the latch bolt 67. As soon as the bolt is thus depressed the spring 61 will shift the rod 60 back to its' normal position, pulling with it the arm 63 so as to uncouple the clutch members '49 and d6. At the same time arm 58 will be released and its actuating spring 57- will shift the rod 55 longitudinally and thereby throw the clutch member 41 into engagement with the clutch member 44. As a result motion will thus be transmitted through the gearing and shaft 31 to gears 43 and d8 with the result that the shaft section ll which is uncoupled from shaft 32 will be rotated in the opposite direction and cause the key 17 to actuate the mechanism of the hand die and unscrew the threaded pipe from the cutters. As soon as the movable members of the hand die have been shifted outwardly a sufiicient distance to completely withdraw the threaded pipe from the cutters, said movable motion will come against the finger 77 and shift the rod 75 longitudinally. This will cause the lever 74 to thrust through rod 72 and cause the finger 73 to push against the lower end of arm 58 with the result that the clutch member ll will be uncoupled from the clutch member lei and the parts of the machine thus reset. At any time during the threading operation the rotation of the key 17 can be stopped by shifting the yoke 3d so as to move the gear out of mesh with gear What is claimed is:

1. In a threading machine the combination with a die having a key operated movable member, and means for supporting the die in operative position of driving mechanism, separate shafts combined therewith,

'rneans upon one of the shafts for engaging and actuating the key, when the shaft is driven in one direction, for feeding a pipe into the threading die, cooperating means upon the two shafts for reversing the movement of the key, and means controlled by the feeding of the pipe during the threading operation for uncoupling the direct connection between the key operating shaft and its driving mechanism and for coupling said shaft to its reversing mechanism, and means operated by the movable portions of the die upon the completion of the unscrewing of the pipe from the cutters for automatically uncoupling the reversing mechanism.

2. In a pipe threading machine the combination with a threading die having a key and a movable pipe engaging and rotating member, of driving mechanism including separate shafts, means upon one of the shafts for engaging the key of the die to actuate the movable portion thereof, means for coupling the shaft directly to the driving mechanism for rotating the key and feeding the pipe to thread the pipe, means operated by the feeding of the pipe and upon the completion of the threading operation for automatically uncoupling said shaft from its driving mechanism and for coupling the other shaft thereto to reverse the action of the key and to unscrew the threaded pipe from the die, and means operated by the movable portions of the die upon the completion of the unscrewing operation for automatically uncoupling the reversing mechanism from the driving mechanism and resetting the apparatus.

3. The combination with a pipe threading die including a key operated movable member, of driving mechanism, an operating shaft, a reversing shaft, gears connecting the shafts, means under the control of the operator for coupling the operating shaft to the driving mechanism, means for coupling said shaft to the key of the die, means operated by the movable member of the die during the actuation of the operating shaft for automatically uncoupling said shaft from its driving mechanism and couplingthe gears to the driving mechanism through the reversing shaft and means operated by the unscrewing of the threaded pipe in the die for uncoupling said gears from the reversing shaft and resetting the mechanism.

4. The combination with a pipe threading die including a key operated movable member, of driving mechanism, an operating shaft, means for coupling it to the key, a reversing shaft, gears connecting the shafts, means under the control of the operator for coupling the operating shaft to the driving mechanism, supplemental means under the control of the operator for uncoupling and coupling said operating shaft, from and to the driving mechanism, means operated by the movable member of the die during the actuation of said operating shaft for automatically uncoupling said shaft from its driving mechanism and coupling the gears to the driving mechanism through the reversing shaft, and means operated by the unscrewing of the threaded pipe from the die for uncoupling said gears from the reversing shaft and resetting the mechanism.

5. The combination with a pipe threading die including a key operated movable member, of driving mechanism, an operat ing shaft, means for coupling it to the key, a reversing shaft, meshing gears, one of said gears being fixed upon the operating shaft and the other gear loose upon the reversing shaft, means under the control. of the op erator for'coupling the operating shaft to the driving mechanism, means for automatically locking said coupling means when the shaft is coupled to the driving mecha nism, means operated by the coupling of the operating shaft to its driving mechanism for holding the reversing shaft uncoupled from its gear, means operated by the movable member of the die during the threading of the pipe for automatically unlocking the coupling means of the operating shaft, separate means for automatically uncoupling In testimony that I claim the foregoing as my own I have hereto aflixed my signa- 10 ture in the presence of two Witnesses.

V JAMES A. REESE. Witnesses SAM COsTEN, C. E. CRIGGER.

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