US1191549A - Magnetic tube-sawing machine. - Google Patents

Description

Patented July 18, 1916.

2 SHEETS-SHEET 1 H. M. WILSON.

MAGNETIC TUBE SAWlNG MACHINE.

APPLICATION FILED FEB. 28. 1915.

wn-uzsszs H. M. WILSON.

MAGNETIC TUBE SAWING MACHINE.

PPLICATION-map FEB. 28. 1916.

Patnted July 18, 1916.

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HOWARD M. WILSON, 'OF PITTSBURGH, PENNSYLVANIA.

MAGNETIC TUBE-SAWING MACHINE.

Specification of Letters Patent.

Patented July 18, 1916.

Application filed February 28, 1916. Serial 0. 80,958.

To all whom it may concern:

Be it known that I, HOWARD M. WILSON, a citizen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Magnetic Tube- Sawing Machines, of which the followin is a full, clear, and exact description, re erence being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a plan view of one form of my improved tube sawing machine. Fig. 2 is a longitudinal sectional view on the line II--II of Fig. 1. Fig. 3 is an end view of the machine. Fig. 4 is a detail sectional view showing the gears for operating the tube supporting members, and Figj 5 is a diagram showing the electrical connections.

This invention relates to an improve ment in tube sawing machines and is designed to' provide a cheap and efficient device for cutting off the ends of the tubes and in which the tubes are moved to the saw by means of oscillating arms, and in which the tubes are held against anti-friction rollers on the arms by electroma'gnets, the arrangement being such that the tubes are free to rotate on the rollers during the cutting operation. V

The precise nature of my invention will be best understood by reference to the accompanying drawings which will now be described, it being premised, however, that various changes may be made in thedet'ails of construction and general arrangement of the parts without departing from the spirit and scope of my invention, as defined in the appended claims.

Referring to the accompanying drawings, the reference characters 2 and 2 designate longitudinal parallel continuously rotating shafts which are ournal'cd in suitable bearings 3 and 3?, respectively. Mounted on the shaft 2 are the frames 4, and mounted on the shaft ,2 are similar frames 4?, there being one pair of said frames at each end of each of the shafts. Journaled on'pins in the upper portion of each of the frames 4 are rollers 5, there being two such rollers for each frame. The frames 4 are also provided with similar rollers 5 for the reception of a tube 6, the ends of which are adapted to be cut 0E by saws 7 and 8 at opposite ends of the machine, and which; may be driven from any suitable source of power. The frames 4 on the shaft 2 are close enough to each other to take in the shortest tube to be cut by the machine, so that a tube which is being cut will be supported on the rollers 5 in the frame 4. This is also true of the frames 4*. Connected to the shaft 2 is a pinion 10 which meshes with a gear wheel 11 journaled in hearings in the frame 4, and which gear wheel meshes with pinions 12 on the spindles of the rolls 5, the arrangement being such that the rolls 5 in one of the frames will be continuously rotated to rotate the tube supported thereon. I have only shown the rollers in one of the frames 4 connected to be positively driven which is sufficient to rotate the tube, but if desired the rollers on the other frame 4 can beconnected in a similar manner. One of the frames 4* is also provided with suitable gearing driven by the shaft 2 and to which I have given the same reference characters with the letter a affixed.

13 designates a motor which is connected to the shaft 2 by suitable speed reducing gears within the casing 14. This shaft 2 is connected to the shaft 2 by means of a to this rock shaft are a plurality of levers 19 which are connected by means of links20 to the frames 4 and 4, so that the frames 4' and 4 will be simultaneously rocked with the shaft 17. Connected to the shaft 17 is a slotted lever 21 which is connected by means of a crank pin 21 with a crank shaft 22 having a crank 23. The crank shaft 22 is provided with a gear wheel 24, the teeth of which are adapted to mesh with the teeth of the gear wheel 25, the gear wheel 25 having a blank space 2 6,while some of the teeth of the gear wheel 24 are cut away to engage the blank space 26 on the wheel 25;

the arrangement being such that the gear.

wheel 24 is rotated one revolution for each revolutionof the gear wheel 25 the gear wheel 25 being continuously rotated while the gear wheel 24 is intermittently rotated for the purpose hereinafter described. The

gear wheel 25 is rotatably mounted on the rock shaft 17, and connected to this gear wheel is a gear wheel 27 which meshes with the' pinion 28 on the shaft 2*.

Connected to each of the frames 4 and 4 are brackets 29 each of which supports a magnet 30.

31 are segmental contact plates, there being one set of such contact plates connected to each bracket and which are in turn con nected to the terminals of the magnets supported on their respective brackets. Mounted transversely of the machine at the proper height are a plurality of skids 32 over which the tubes are adapted to be rolled when fed to the machine. Connected to these skids adjacent to thevarious rock frames 4 and 4 are brackets 33, and connected to these brackets, but insulated therefrom are brushes 34 which are connected to a suitable source of electrical energy, the brushes being arranged to contact with the plates 31 to energize the magnets when they are in predetermined positions, as hereinafter described.

The operation of the device is as follows: The tubes to be cut away are first rolled down the skid to the dotted line position shown in Fig. 3, the rock arms 4 being shifted to the position shown in dotted lines and at which time the brushes 84 will be in contact with the plates 31 so that the magnets will be energized to hold the tube in position between the rollers. As soon as the tube has been moved to the dotted line position, the friction of the rollers will cause the tube to rotate on the rollers; the rock arms are then shifted to full line position by means of the crank 23 at which time the teeth of the gear wheel 24 will be in mesh with the teeth 25 to move the frames to the full line position. As soon as these frames have reached this position the blank space 26 will engage the cut-away portion of the gear wheel 24, so that the tube will remain in'the full line position during the period that the blank space 26 passes over the cut away portion of the wheel 24, which will be sufficient time to cut off the end of the tube by means of the saw 7. As soon as the teeth 25 again engage the teeth of the wheel 24, the frames 4 and 4 will be rocked to the left to move the tube toward the skids 32, and just before the tube reaches the skids the electrical connections to the magnets 30 will be broken so that the tube will roll away from the frames 4 toward the frames 4. The tube 6 will then be moved longitudinally to theright or left to bring the end to be cut in proper alinement with the saw 8 and will be conveyed thereto by means of the frames 5 the operation of which will be precisely the same as the operation of the frames 4.

The advantages of my invention result from the provision of electro-magnetical devices for automatically conveying a tube to be cut to the cutting saw and retaining it in position with relation to the saw by means of electromagnets and shifting the tube from its position adjacent to the saw after the tube has been cut and then breaking the electrical connections to release the tube. Further, from the provision of means to rotate the tube during the time that it is in proper relation with the saw to be out, thus insuring a square cut on the end of the tube. Further a much smaller saw can be used than when the tube is cut by passing the saw therethrough.

I claim:

1. A tube-sawing machine comprising a saw, means for moving a tube to be cut into position with relation to the saw, and electro-magnetic means for retaining the tube in position with relation to the saw; substantially as described.

2. A tube-sawing machine comprising a rotary saw, means for moving the tube to be cut into position with relation to the saw, means to rotate the tube, and electro-magnetic means for retaining the tube in contact with the rotating means; substantially as described.

8. A tube-sawing machine comprising a saw, electro-magnetic means for moving the tube to be cut into position with relation to the saw, and rollers for rotatingthe tube, said electro-magnetic means being also arranged to hold the tube in frictional contact with the rollers; substantially as described.

4. A tubesawing machine, comprising a plurality of rocking frames, tube supporting rollers on said frames, means to rotate said rollers, means to intermittently rock said frames to deliver the tube to the saw and to retain the tube in cutting relation to the saw, and electro-magnetic means for holding the tube in contact with the rollers during a portion of the travel with the rocking frames; substantially as described.

5. A tube-sawing machine, comprising a rotary saw, a plurality of rock frames, means for intermittently rocking said frames and tube supporting rollers on said frames, means for rotating some of said rollers to rotate the'tube, an electro-magnet carried by one of said frames and arranged to hold the tube in contact with the rollers, and electrical connections for said magnet arranged to permit the circuit to flow through the magnet during a portion of the travel of the frame and to cut out said circuit in another portion of its travel; substantially as described.

In testimony whereof, I have hereunto set my hand.

HOWARD M. WILSON. Witnesses:

J. M. HALL,

J. H. J oHNsoN.

Copies of this patent may be obtained for five cents each, by addressing the commissioner of Patents,

Washington, D. G. e

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