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p 927 P. G. WENTWORTH TWISTER TRAVELER AND METHOD OF MAKING SAME Filed Aug. 26. 1926 Patented Sept.--13, 1927.
OFFICE.
PHJLIP WENTWORTH, OF PROVIDENCE, RHODE ISIIJAND- 'rwrs'rnn' 'mavnnnn. AND mnrnon or MAKING same.
Application filed August 26, 1926. Serial No. 181,667.
In previous patents I have dealt with the problems of lubrication and durability 1n travelers and refer to Nos. 1,415,072 and- 1,461,059 as examples of each. 6 My present invention involves bot h factors and specifically involves certain improvements over the former in which a lubricating channel was formed to catch and dellver the grease.
As therein shown, the groove was a channel cut in the inner face of the traveler which was of the twister type. While these travelers have proved to be highly satlsfactory in operation, they were somewhat difiiciilt and expensive to make. Furthermore, they had a tendency common to travelers of the twister type to break at their upper bend, which is. usually a rather abrupt turn. The difiiculty has been pro- 2 0 vide metal pliant enough to take this bend and yet of sufiicient rigidity to stand the strains of usage.
Pursuant to my present inven-tlon, I provide a traveler of'stock capable of being bent' as desired, withoutfracture and yet a when formed .according to my method,
having a very considerable strength or stlfiness.
I will proceed to describe my invention and will refer to the accompanying drawings in which I have shown a characteristlc embodiment.
In the drawings:
'Fig. 1 is a, view of such a traveler on its ring.
.Fig. 2 is a diagrammatic view of the method of manufacture.
Fig. 3 a vertical section. I
- Fig. 4 an inside face view, and Fig. 5 a section on the line 5-5 of Fig. ,4.
In the embodiment shown in the draw-a ings, the traveler T is of the usual type and adapted to run on the conventional ring R as shown in Fig. 1. While traveler T is 'of general formas shown, it has a lubricatlng groove after the manner of my invention in my previous Patent 1,415,072 as before explained. According to my present invention, the groove G instead of being a slot or cutroovef is in the nature of the blank with its ollo'w. side inward toafiord a groove, and
its raised side outward forming a longitudmal rim which strengthens the traveler.
The problem in this type of traveler is somewhat similar to that involved in my prior Patent 1,461,059. The twister traveler, however, is a heavier traveler and is formed of difl'erent stock .which is usually an alloy comprising generally a composition compounded to a certain analysis from brass,
cgpper, zinc, and tin. p
The critical point in this type of traveler is at the bend t where the stockis turned at substantially right angles to itself, and where the strain, incident to placing the traveler on the ring R, localizes in such a way as to be apt to cause breakage at this point, For this reason, the alloy of this traveler has had to be somewhat soft even though this softness was undesirable in the body of the traveler. In accordance with my invention, I take my stock preferably in rod form as indicated at S in Fig. 2. This stock is passed through rolls A which flatten'it to the desired cross section. A stop is then made by the dies B to produce the rib G at suitable intervals. The stock is then severed in proper length as indicated at S in Fig. 2, and is then formed into the traveler T as therein indicated. 1
This provides a traveler which has a surface hardness imparted by the rolling and yet of sufiicient softness to rmit the bend at t and to allow the trave er to harden at that point without breakage. The body of'the traveler is, however, given great rigidity by means of the impressed groove or channel G.
In the formation of this channel, there is not only the rigidity due to the stiffening effect of the rib as such, but also a further hardening effect due to the work of the metal in the die. The groove G has thesame formation asthe groove or slot in my previous patent but the traveler so constructed and formed has the" additional advantages above recited.
Travelers in accordance with my invention may beef-any shapeor design and formed of any usual material and may be made in any suitable steps. The method diagrammatically illustrated in Fig. 2 is intended merely as an illustration, and the depth, length, and location of the groove and rib, may be modified to meet any requirements or conditions;
All such modifications and variants are, therefore, to be understood as contemplated by my invention which is formulated in the following claims.
I claim 5 1. A traveler of the class described comprising a fiat metal body having a channel bead formed longitudinally thereof, and disposed with its channel side on the inner face of the traveler.
2. A traveler of the class described comprising a flat metal body having a pressed channel bead formed longitudinally thereof, and disposed with its channel side on the inner face of the traveler.
3. In a traveler of the class described, a. longitudinal channel bead having its channel on the inner face thereof.
4. In a traveler of the class described, a pressed longitudinal channel bead having its channel on the inner face thereof.
5. The method of forming travelers, consisting in impressing in the stock a channel head with its channel on the inside face of the traveler.
6. The method of forming travelers, consisting in flattening a cylindrical stock, in impressing in the stock spaced channel beads and severing the stock between beads and in forming therefrom a traveler with its channel on the inside face. a
In testimony whereof I afiix my signature;
PHILIP C. WENTWORTH.