US1349344A - Securing-bolt - Google Patents

Description

A. M. ONEILL.

WITNESSES Patented Aug. 10, 1920.

UNITED STATEd PATENT ()FF'ICE.

ARTHUR, M. ONEILL, 0F PITTSBURGH, PENNSYLVANIA, ASSIGNOR T0 JOHN D. BROWN,

0F PITTSBURGH,

PENNSYLVANIA.

SECURING-B 0LT.

Specification of Letters Patent.

Patented Aug". 10, 1920;

Application filed January 14, 1919. Serial No. 271,031.

To all whom it may concern:

Be it known that I, ARTHUR M. ONEILL, a cit'zen of the United States, residing at Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented certain new and useful Improvements in Se curing-Bolts, of which the following is a specification.

y invention consists of an improvement in securing bolts or pins, and has for its object to provide a device of this kind adapted to be positively and securely retained in position and to be quickly and easily inserted or removed by means of a spring actuated locking dog, constructed and adapted to operate in the manner more fully hereinafter described.

In the drawings showing one form of the device,

Figure 1 is a View of the bolt in side elevation with the locking dog extended to locking position;

Fig. 2 is a similar View, partly in section, showing the dog retracted;

Fig. 3 is a view similar to Fig. 1, partly in section, showing the bolt combined with a supplemental spring; and

Figs. 4 and 5 are end views of the bolt showing the locking dog in erected and depressed position respectively.

The bolt 2, of any suitable length and diameter, is provided with a head 3 having an annular shouldered groove 4 by which it may be easily grasped by the fingers for easy withdrawal.

At its other end, the bolt is longitudinally slotted as at 5 for the greater portion of its diameter, open at one side as at 6 and closed at the opposite side by the longitudinal integral wall 7 and backwardly from its terminal for a suflicient distance to provide for the insertion and manipulation of the pivoted locking dog 8.

The dog is of a width to provide by its rear terminal 9 a good retaining or limiting abutment for engagement against any suitable surface a, as that of a plate, eyebar, link, or against the face of any element or elements to be connected or held together by the bolt. In a similar manner, the inner side of head 3 engages against an opposite similar or co-acting face 6, as will be readily understood.

Dog 8 is enlarged at its middle portion, as shown, and is pivotally mounted in slot 6 between the sides of the bolt, at or about its middle, by a pin or rivet upon which it may freely rock, and a spring 11 is mounted in any suitable manner, as by inserting its end in a slot in the dog, as indicated at 12. Holding end 9 of the dog is preferably so inclined to its outer edge that it will assume a right angle to the center of the bolt when erected, as in Fig. 1, and thus bear freely against the face a for good holding action.

The outer terminal 13 of the dog extends somewhat beyond the terminal of the bolt and is preferably tapered at one or both edges, providing a manipulating terminal, which may be thrust outwardly by the fingers or any suitable instrument to depress inner terminal 9, as in Fig. 2. In such position, its end 9 bears against the inclined face 14, forming a portion of the inner end of slot 6, and face 14: is preferably so located as to just meet the end face of terminal 9 when the outer edge of the dog is depressed inwardly to coincide with the outer cylindrical face of the bolt. The dog will operate to open or close, however, irrespective of the limiting face 14-.

The outer edge of the bolt beyond rivet 10, being slightly inclined inwardly, provides ample clearance for withdrawing the bolt through its receivin hole or holes. thrust inwardly to the full depth, and with the dog properly positioned, spring 11 will then thrust the inner end of the dog outgardly to its normal holding position, as in When desired, a coiledspring 15 may be utilized between head 3 and face I) as when the bolt is longer between the dog and the bolt head than the distance between opposite faces a and 6. Such spring acts to positively bring the holding end of the dog into engagement with its co-acting face.

It will be understood that the device may be changed or modified in construction, proportions, or details by the skilled mechanic to suit it to plication, sidered as claim.

What I claim is:

securing bolt having a head at one end and provided at its other end with a longitudinal central slot extending centrally through the major portion of the bolt with an outer opening at one side, a closing wall but all such changes are to be conwithin the scope of the following When varying conditions of use or apr at the other side and an outwardly sloping bolt and lengthwise thereof and a spring 10 inner bearing end, a locking dog pivotally mounted in the slot between the looking dog mounted at its middle portion in said slot and the bolt adapted to normally extend the between the sides of the bolt provided at inner end of the locking dog outwardly beits inner end with a sloping abutment teryond the bolt.

minal adapted to be depressed flush with In testimony whereof I hereunto aflix my 15 the bolt periphery and against said sloping signature.

bearing and at its outer end with a tapered terminal extending beyond the end of the ARTHUR M. ONEI'LL.

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