US2474848A - Tool for assembling carbine bolts - Google Patents

Description

,July 5, 1949. P. E. KERN TOOL FOR ASSEMBLING CARBINE BOLTS Filed July 18, 194e `& Rk\\\\\\\ `man..

` Fnl E. KEN1.

Patented July 5, I1949 TOOL FOR ASSEMBLING CARBINE BOLTS Paul E. Kern, Lebanon, Pa.

Application July 18, 1946, Serial No. 684,440

(Granted under the act of March 3, 1883, as amended April 30, 1928; 370 O. Gr. 757) 1 Claim.

The invention described herein may be manuiactured and used by or for the GovernmentJ for governmental purposes, without the payment to me of any royalty thereon.

This invention relates to tools, and more particularly to a type for facilitating the removable of the iiring pin, the extractor and the ejector from the bolt of a carbine calibre .30 M1.

An object of the invention is to provide a device of this character, into which the bolt may be quickly and easily inserted and positively held during assembly or disassembly.

Another object of the invention is to provide a device, which While holding the bolt securely, will also depress the extractor and ejector plungers and hold them against escape from their sockets until it is desired to remove them.

A further object of the invention is to provide a device, which will be sturdy, inexpensive to manufacture and will be easily kept in working condition.

Other objects and advantages of the invention will be apparent during the course of the following description.

In the accompanying drawings, forming a part of this specification and in which like reference characters are employed to designate like parts throughout the same,

Figure 1 is a side elevational view of a tool embodying the present invention, showing a rifle bolt seated therein, in position to be disassembled,

Figure 2 is a vertical longitudinal section thereof, approximately on the line 2-2 of Figure 4,

Figure 3 is a vertical transverse section thereof, approximately on the line 3-3 of Figure 2,

Figure 4 is a horizontal transverse section thereof, taken through the pivoted joint and showing the bolt and one jaw in plan,

Figure 5 is a fragmentary view similar to Figure 4 showing the recesses for holding the bolt in the jaw, and

Figure 6 is a similar view taken on the line 6 6 v of Figure 2.

A standard carbine .30 caliber bolt is shown to illustrate one use of the device, but it is to be understood that this bolt forms no part of the present invention.

In the drawing, wherein for the purpose of illustration is shown a preferred embodiment of my invention, the numeral 9 designates generally a carbine bolt. This bolt houses a firing pin l0 which has a tang I at one end and a restraining notch I2 near the other end. Also housed in the bolt 9 is a spring pressed ejector plunger |3, having a restraining notch I4.

The bolt 9 has a transverse bore l5 for receiving a pivot pin I6 which forms a part of an extractor The pivot pin I6 engages in the notch |2 of the firing pin it and the notch i4 of the ejector i3. A spring pressed plunger I8 is also provided for the extractor The plunger I8 has its longitudinal axis disposed at an angle to the longitudinal axis of the bolt.

Near its end adjacent the extractor Il, the bolt 9 is formed with a locking lug 2E! and a cam lug 2|.

All of the foregoing structure is old as has been stated.

Due to the smallness of the parts and to their location with respect to each other, it has been diiiicult, in the past to assemble these elements by hand without losing some to the spring pressed parts, or injuring the fingers of the assembler.

The present invention has been devised to overcome these difficulties and is herein disclosed as comprising two heads, movable toward and away from each other, each head being shaped to perform its function as will be shown.

A rst jaw 22 is provided with a bore 23 forming a part of a seat for the reception of the bolt 9. At one side of the bore 23 and opening thereinto is a slot or key-Way 24, through which the firing pin tang passes during insertion of the bolt 9 into the bore 23.

A shoulder 25 is formed in the jaw 22 to serve as a support for the locking lug 20 of the bolt 9.

Arising a suitable distance above the shoulder 25 at each side thereof are parallel walls or abutments 26 which serve to confine the lug 20 in a predetermined position.

A second shoulder 2l is formed in the jaw 22 to serve as a support for the cam lug 2|. This shoulder 21 is located at the side of the bore 23 opposite to the seat 25.

At each side cf this shoulder also are formed walls or abutments 28 snugly embracing the cam lug 2|. The bore 23, the shoulders 25 and 2l together with the abutments all contribute in holding the bolt in a predetermined position, against rotation or longitudinal movement.

A second jaw 29 is provided, and is adapted to be'moved toward and away from the 'lrst jaw 22 as will appear later.

When the bolt 9 is properly positioned in its seat in the rst jaw, and the two jaws are moved toward each other, the ejector i3 comes into substantial axial alignment with an adjustable presser finger 3U threadedly engaged in a bore in the second jaw 29. A locking nut 3| is threaded onto tractor plunger I8. When the jaws 22 and 29 are moved toward each other the-tooth 315` of the pawl 33 will rst contact the inclined face of the extractor I1, and thereafter be cammed-onto the plunger I8. A similar tooth 3,1 is formed onthe outwardly extending end of the pawl 33. It will be apparent, upon examination of the drawing, that the pawl 33 is reversible so that either tooth 36 or 3l may be used in the event that one becomes broken or deformed.

The jaw 22 is provided with a handle 38 which isformed, at its junction with the jaw, with a Pivot receivinglug 39. A handle 40, for the jaw 2,9, is likewise provided with a similar pivot receiving lug 4I.

The portions 39 and 4I are formed with aligning bores to receive a pivot element 42. This ccnnection is conventional and may be varied as the requirements of shop oriield practice dictate.

The operation of the, device is as follows:

It should be understood at this point that the ringpin, ejector and spring, extractor and spring pressed plunger, are all held in the bolt by, one element, that element being the extractor pivot pin I9. Should this pivot pin be driven out, all of .the above named parts would be propelled outwardly by their springs to some distance, and on occasions lost. The present invention has been devised to overcome these diiculties in assembly and disassembly.

The end of the bolt 9remote from the lugs and 2l, is inserted into the bore 23 of the jaw 2,2 and rotated untilthevtang II of firing pin I0 cornes into alignment withtherslot 24. The bolt may thenbe fully inserteduntil the lugs and El. are at rest ontheir` respective shoulders 25 and 21.

At this time the; bolt andlugsare firmly held against rotation so that theV elements to be removed or replaced cannot loe-moved'out of the paths of thev nger and the-pawl` 33. The jaws are now moved toward each other by means of their handles.

The pivoted pawl 33 is'y so, designed that its tooth '36 comes 4into contact with they extractor plunger I8 near its outer end and retracts the said plunger when pressure is applied to the handles 38 and 40 to close the jaws. This action causes the pawl 33 to rock on its pivot 34 against the tension of its spring 35 and let its tooth 36 lollow the line of motion of plunger I8.

Simultaneous-ly with this-operation.the presser finger 30 is-brought to beanon theejector I3 and causes retraction thereof against its spring.

All spring pressed parts are then safely held andv the ejector. pivot pin I6 may be driven out or inserted into its bore I5, as desired.

It-is to be understood that the form of the inventionherewithshown and described, is to be taken as a preferred example of the same, and that Various changes in the shape, size and ar` raneementof parts. may be resorted to, without. departing fromthe spirit of the invention, or the.

scope of the subjoined claim.

Having. thus` described my invention, Iy claim:

An assembly, device for firearm bolts compris-- ing a pair of pivotedjaws, onevof said jaws hav-- ing a bore therethrough perpendicular to its inner' surfacel and having'formedlon said inner surface two oppositely, disposed recesses opening into said bore; theother of said jawshaving a slot there-y through perpendicular to its inner surface to accommodate ,a spring` biased ypawl pivoted i therein, said pawl having a forwardly directed tooth terminating intermediate the inner surfaces of said jaws, said other jaw also havnga presser linger fixed therein perpendicular' to its inner surface and positioned forwardly,` and, laterally of said pawl, one end of saidjmesserf finger terminating ina section of vreduced. diameterintermediate said inner surfaces.

PAUL E. KERN.

REFERENCES CITED 'I'he following references are of record in the le of thispatent:

UNITED STATES PAYIENTS' Nunlber` Name Date 390,457 Cook: Oct. 2, 1888 839,045 Straw Dec. 18,1906 979,609 Vaughn Dec. 27, 1910 982,635`v Rogers et a1.` Jan. 24, 1911 1,049,539. Scott. Jan. 7, 1913 1,155,632 Woodhead Oct.,5, 1915 1,397,614 Bary- ,Nov. 22, 1921 2,359,897. Christensen. et al. Oct. 10, 1944 2,364,630` Gilligan Dec. 12, 1944

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