US683845A

US683845A - Apparatus for threading conduits.

Info

Publication number: US683845A
Application number: US4358801A
Authority: US
Inventors: Thomas A Callahan
Original assignee: Individual
Current assignee: Individual
Priority date: 1901-01-17
Filing date: 1901-01-17
Publication date: 1901-10-01
Anticipated expiration: 1918-10-01

Description

' Frrc.

PATNT THOMAS A. OALLAHAN, OF ST. LOUIS, MISSOURI.

APPARATUS FOR THREADIN G CONDUITS.

SPECIFICATION forming part of Letters Patent No. 683,845, dated. October 1, 1 0

Application filed January 17, 1901. Serial No. 43,588. No model.)

To all whom it may concern.-

Be it known that I, THOMAS A. CALLAHAN, of the city of St. Louis, State of Missouri, have invented certain new and useful Improvements in Apparatus for Threading Conduits, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part hereof.;

This invention relates to an apparatus for threading conduits; and it consists of the novel construction, combination,and arrangement of parts hereinafter shown, described, and claimed.

Devices of this character heretofore have been constructed with means for advancing the machine within the conduits; but whenever it became necessary for any reason to withdraw them much difficulty has been encountered and no special means has been provided for such backward movement.

The object of this invention is to provide an improved apparatus of the class mentioned and for analogous purposes which can be moved in either direction by the proper ma nipulation of the operating devices.

In the drawings, Figure 1 is a view showing the device in operative position. Fig. 2 is a view showing the parts in their'normal or stationary position. Fig. 3 is a view showing the position of the parts while in the act of advancing. Fig. 4 is a sectional view takenon the line a, a of Fig. 2. Fig. 5 is a sectional view taken on the line b b of Fig. 2. Fig. 6 is a sectional view on the line 0 c of Fig. 2. These views are all looking to the right. Fig. 7 is a view showing the position which the friction-plates assume when the device is moved backward.

Referring to the drawings in detail, 1 denotes the upper rod, which is tubular, and attached to the rear end of which is a small plate 2.

3 indicates the lower tubular rod, which is of the same length as the rod 1, and attached to the forward end of which is a plate 4, similar to the plate 2. The said plate 2 is rigid with the rod 1 and is provided with an opening within which the rod 3 operates. The plate 4 is provided with a like opening for the reception of the rod 1. flange 5 is rigid with the forward end of the rod 1 and prevents the said rod from being An enlargement or which are at a suitable remove from each 2 other andbetween which is mounted a strong coil-spring 8, one end of which abuts against the rear flange 7 and the forward end bears against the friction-plate 9. The said friction-plate 9 is provided with an elongated opening, whereby it is permitted to lie at an incline at certain times duringthe operation of the device. In the upper side of the said plate 9 is formed a notch or slot 10, within which the rod 1 operates and which permits the said plate to move to an inclined position, as above mentioned. From this it appears that the tendency of the spring 8 is to hold the plate 9 in a "ertical position, from which it is moved by the movement of the operating-rod, which I will now describe.

The operating-rod 11 is carried in openings formed in the end plates 2 and 4 between the rods 1 and 3. An elongated opening 12 is formed in the plate 9, which permits it to assumeaninclined position whenever required. A frame 13, consising of two parallel members, has an opening formed in its forward end, through which the rod 11 projects, and the rear ends of the two members are bent downwardly and operate within openings formed, in the brackets 14, the said brackets being secured to the upper end of the plate 9. A lug 15 is rigid with the rod 11 a short distance in front of the rear end of the frame 13, and whenever the said rod 11 is drawn rearwardly the lug 15 bears against the frame 13, moving the said frame and drawing the plate 9 into an inclined position, as shown in Fig. 7. This permits the free movement of the forward end of the device, which may be continued so long as the plate 9 is in the inclined position shown. Whenever the rod 11 is released, the plate 9 is moved to a vertical position by the spring 8, and whenever in this position the ends of the said plate engage against the inner side of the conduit-pipe, and thereby hold the machine rigidly in position. Near the rear end of the plate 1 are two enlargements or flanges 16, corresponding to the flanges 7, and a spring 17 is mounted around the said rod 1, and the forward end thereof bears against the friction-plate 18, mounted upon the rod 1 in the same manner as the plate 9 is mounted upon the rod 3. The lower side of the friction-plate 18 is provided with a notch or depression 19, which permits its movement over the rod 3 to assume the different positions shown in the drawings. The lower side of the said plate 18 is provided with a horizontal extension 20, the purpose of which is to prevent the said plate from becoming caught or fastened in any crevices or cracks which might be encountered in passing through the conduitpipe. The frame 13, in addition to the function above ascribed to it, performs the same function in holding the plate 9 out of cracks in the conduit-pipe.

21 indicates a small pulley which is mounted within a slot formed in the rear end of the rod or pipe 1, and a rope or similar connection 22 is passed into the end of the pipe and outwardly over the said pulley 21, and the inner end of the rope is drawn backward and attached to the flange 6. A pulley 23 is attached to the rear end of the rod 11, and a rope 24 is passed over the said pulley and the rear end thereof is attached to an eye 25, secured to the end of the rod or pipe 3.

26 indicates a rope extending through the pipe or rod 3 and which is passed over asmall pulley 27, carried in a slot formed in the for ward end of the said pipe, and the rear end of the said rope is attached to a projection rigid with the pipe or rod 1.

The operation of the device is as follows: The apparatus is started within the conduitpipe with the parts substantially in the position shown in Fig. 1. The operator then draws the rope 26 toward the rear, by which operation the plate 9 becomes fixed in the pipe, and the plate 18 is drawn forwardly with the rod 1, for the reason that its lower end is free to move, thereby allowing the said plate to assume an inclined position. WVhen the rods have been extended into the position shown in Fig. 3 and the'plates 9 and 18 are close to each other, the operator engages the rope 22 to advance the lower rodS and release the plate 9. By drawing rearwardly on the rod 1 the plate 18 becomes fixed in the conduit-pipe and the rod 3 is advanced, the upper end of the plate 9 being pressed to the rear by the forward move.- ment of the said rod 3. After the rod 1 has been advanced until the plates 9 and 18 are adjacent to each other the rope 26 is released and the rope 22 is again operated, as above described. The operation is repeated continually and alternately advancing the rods by the process which 1 have just described. In case any obstacle is encountered within the conduit-pipe, so that the device can be advanced no farther, it may be drawn out by drawing the rods or pipes 1 and 3 into the position shown in Fig. 3. The operator then engages the rope 21, which draws the rod 11 rearwardly, and the lug 15 is brought to bear against the lower end of the frame 13, which will draw the plate 9 into an inclined position, as shown in Fig. 7. A lug 28, similar to the lug 15, engages against the front side of the plate 18 and forces the same into an inclined position, shown in Fig. '7. After the plates have been moved into this position their ends no longer contact with the inner surface of the conduit-pipe and the machine may be drawn out by drawing on any of the ropes attached thereto. From this it appears that in addition to providing an improved means for advancing the machine within the conduit-pipe I have also provided means whereby it may be drawn out in case necessity arises.

I claim- 1. An apparatus for threading conduits, consisting of two rods or pipes supported adjacent. to each other, friction-plates carried by said rods or pipes, an operating-rod and means for moving said rod to operate the friction-plates, substantially asspecified 2. An apparatus for threading conduits, consisting of two parallel pipes, movably attached together, ropes connected to said pipes for moving them relative to each other, friction-plates carried by said pipes, a rod for releasing the friction-plates in the conduit, and means for operating said rod, substantially as specified.

3. A conduit-threading apparatus, consisting of two parallel pipes, a spring-held friction-plate carried by each of said pipes, a rod for releasing the plates, a rope for moving said rod and means for moving the device in either direction, substantially as specified.

a. An apparatus for threading conduits, consisting of two long parallel rods or pipes supported adjacent to each other, a friction plate carried by each of said pipes, means for clutching the said plates within the conduit, a rod for releasing the plates, means for moving said rod and means for moving the device in either direction, substantially as specified.

5. An apparatus for threading conduits, consist-in g of two rods or pipes supported adjacent to each other, a friction-plate carried by each of said pipes, a rope passing through each of the said pipes and having its opposite end attached to the other pipe, and means for advancing the device within" the conduit when the said ropes are operated.

6. An apparatus for threading conduits, consisting of two rods or pipes supported adjacent to each other, a friction-plate carried by each of said pipes for preventing backward movement, means for holding said friction-plates in substantially vertical position within the conduit, a rod for drawing both of said friction-plates into an inclined position, a rope for operating the rod, ropes passing through the said pipes, each of said ropes having its end attached to the other pipe than the one through which it passes, means for advancing the pipes when the ropes are 0pcrslit through which it passes, means for advanc ing said pipes when the ropes are operated, and means whereby the device may be withdrawn out of the conduit.

In testimony whereof I affix my signature in presence of two witnesses.

THOMAS A. CALLAHAN.

ated, and means for drawing the said device to the rear when the said plates are inclined, substantially as specified.

7. An apparatus for threading conduits, consisting of two pipes supported adjacent to each other and each carrying a pulley supported in a slot formed in the said pipe, ropes passing through the said pipes and over the Witnesses: said pulleys, each of said ropes having its ALFRED A. EIOKS, 10 end attached to the other pipe than the one I J. D. RIPPEY.