US1696162A - Tube frame - Google Patents

Description

Dec. 18, 1928. r 1,696,162

E. F. HATHAWAY TUBE FRAME Filed Feb. 24, 1925 CIQ &

11/1 III/II 3 jwarzfir. 5e 7 J 5 Patented Dec. 1 8, 1928.

'UNITEEDNSTA TES PATENT OFFICE,

EDGAR F. HATHAWAY, or WELLESLEY, MASSACHUSETTS, AssreNon To sHAwMur ENGINEERING com ANY, or BOSTON, MASSACHUSETTS, A CORPORATION or MAS SACHUSETTS.

TUBE FRAME,

A'pplication filed February 24, 1925. Serial No. 11,047.

This invention relates to tube frames, and 1s particularly concerned with the problem of affording a strong, durable construction for the support of the yarn-spoolin the tube ploy, in connectionwith the spool-bearing bracket of tube frames, a pivotal latch formed with a sharply out-turned projecting 'lug arranged to spring into engagement with a recess on the spoolbearing arm which carries it in order to lock the spool-journal in its bearing, but a latch of this kind not readily-made e-xceptiout of soft metal, spring steel being altogether too hard to lend itself to such formation, and as a soft metal latch becomes permanently sprungor by repeated flexing to allowit to move to locking position and be released'therefrom, such an arrangement was not found to be satisfactory from a praoticalstandpoint.

It is the object of the present invention to provide a construction and arrangement that will meet the practical requirements of the tube frame art and shall be both reliable in operation and ,durable in service;

To this end the invention comprises a. spool-bearing arm or bracketadapted to be secured to a tufttube frame and notched at its outer end to-form a bearing recess bounded by opposite jaws, oneof which is offset into the path of a pivotal latch capable of being swung into journal-locking position, and being releasably but positively interlocked with said jaw to prevent accidental opening of the bearing. Another feature of the invention resides in the construction and arrangement of the latch forming a heel portion which limits the opening movement of the latch so that the upper edge portion of the latch is left in position to guide the spooLjournal being inserted into its bearing recess, thereby facilitating the insertion of the journal. These and other features of the invention will be described in detail in the following specification and will be defined in the claims hereto annexed.

In the accompanying drawings:

Figure 1 is anassembled view of one end of the tube frame equipped with the suspension and the spool-bearing bracket embodying the present improvements.

Figure 2 is an interior elevation of the spool-bcaring bracket and latch in journalclosing position. I

Figure 3 isa horizontal cross section through the upper end of the latch and spool-bearing arm.

Figure 4 is an inside elevation showing the latch in open position to receive and guide the spool-journal intoits bearing 1e-' cess.

Figure 5 is a detail view, similar to Figure 3, showing a round cornered offset latch locking jaw.

In the form illustrated in the drawings, the tube frame carrier-bar l, is shown of tubular construction to receive the U-shaped attaching member 5, which is detachably secured inside the hollow end portion of the carrier-bar bysuitable fastening screws 5. This attaching member is firmly secured by rivets to the spool-bearing bracket comprising an upright arm 3, preferably of sheet metal, whose outer or upperend is recessed to form a journal-bearing for the journal of the usual yarn-spool 2, which bearing recess is bounded by two jaws 3 andB on opposite sides of the bearing recess. 7

To retainthe spool-journal positively in its bearing recess, while permitting its release when desired, I provide a pivotal latch 7 preferably of'spring steel, which latch, as

shown, is fulcrumed on a pivot stud 7 car- 7 ried by the arm 3, the latch being cut away or recessed at its upper end to form a hooklike portion 7 arranged to overhang the journal of the yarn-spool when the latch is in journal-locking position, as indicated in Figure 2.

As shown in Figures 1 and3, the nearer jaw 23, forming the nearer side of the bearing recess, as the latch is moved to locking position, is offset to intersect or project into the plane of movement of the latch 7. The overhanging hook portion 7 of the latch extends downwardly enough to overlap both jaws, as shown, so that when the latch is forced inwardly the hook portion 7" rides over and springs beyond the offset jaw 3, which is then located between the edges'of the hook-defining recess in the latch 7, as shown in Figure 2. The nearer side of the offset jaw 3 is preferably bevelled, as shown in Figure 3, to give a cam-like action to spring the outer end of the latch inwardly so that it will pass over the oflz'set jaw with the least resistance. \Vhen a spring metal latch is used this spring action can be repeated indefinitely without permanently deforming the latch which thus affords a positive but releasable locking means for preventing the accidental escape of the yarnspool journal. l

The beveling of the jaw 3 can be accomplished in the same operation of the dies that produces the ofi'set of the jaw 3, and instead of a bevel this jaw, as shown at 3", in Figure 5, may be rounded to accomplish the same purpose.

At the lower outer corner opposite its fulcral pointthelatch 7 is formed with a heel portion or corner 7, proportioned and arranged so that when the latch is in opened position this heel portion will come into contact with the adjacent part of the carrier-bar 1, and as shown in Figure 4, when stopped or limited to this position of outward movement, the inner edge 7 of the latch forms an inclined guide aligning with the front edge of the bearing recess to guide v the spool-journal directly in to the bearing recess. This guiding of the journal into the open bearing is of considerable practical convenience to the operator as the opposite journal of the spool usually goes into a closed bearing which must be kept in sight in order to properly insert the spool.

Any suitable means for suspending the r tube frame from the carrier-chains, shown in dotted lines in Figure 1, may be employed in association with the spool-bearing bracket. In this case I have shown an upwardly extending chain-penetrating arm 4, secured against the outer face of the spool-bearing bracket and carrying a pivot suspension hook 6, fulcrumed on the transverse pivot pin 6 and normally pressed outward by means of a spiral spring, not here shown, which is seated in a punched out recess 3, formed in the spool bearing arm.

It will be understood that the yielding member or latch is substantially flat, that is, without any sharp or abrupt oitset and may therefore be made of good spring steel, while the fixed member, that is the bearingJ arm cured to a tube 'rame, a latch fulcrumed to swing transversely of the tube frame in close proximity to one face of said arm, said latch having its outer portion cut out to form a hook-like portion arranged to overhang a spool-journal, the corres )onding portion of said arm being-provic ed with an open bearing recess bounded by opposed jaws, the nearer jaw being offset to intersect the plane of movement of said latch and to interlockingly engage the hook-forming recess of the latch to positively retain the latch in journal overhanging position, substantially as described.

2. In a tube frame, the combination with a carrier-liar, of a spool-bearing arm secured thereto and having in its upper end portion an open bearing recess for the reception and support ofa spool journal, a keeper mounted on said arm to be moved to and from journal-retaining position, said keeper being sprung laterally by its inherent resiliency into positively locked engagement with one side of said bearing recess to prevent accidental displacement from such position, said keeper being formed to engage an abutting portion of the tube frame to limit its movement to open position at a point where one edge of said keeper is in line withthe open bearing recess to guide the spool-journal into said bearing, substantially as described.

In witness whereof, I have'subscribed the above specification.

EDGAR F. HATHAWAY.

Images