US2145054A - Take-down firearm - Google Patents

Description

Jan. 24, 1939.

H. F. MOSSBERG TAKE-DOWN FIREARM Filed Nov. 50, 1937 IN VENTQR Ha raid EMUSsb-erg.

ATTORNEY Patented Jan. 24, 1939 TAKE-DOWN FIREARM Harold F. Mossberg, New Haven, Conn, assignor to 0'. F. Mossberg & Sons, Inc, New Haven, Conn, a corporation of Connecticut Application November 30, 1937, Serial No. 177,234

5 Claims.

This invention relates to firearms of the takedown type and more particularly to an improved take-downv screw for use in securing the forearm to the barrel of such types of firearms.

The principal disadvantage experienced with the form of take-down screws at present in use is, that being disposed in, and extending downwardly from, the forearm forward of the trigger guard, they interfere with the proper holding of the firearm, or gun, while it is being sighted, by presenting a protuberance on an otherwise smooth surface. Such a condition is both uncomfortable and inconvenient. This invention contemplates as one of its objects the provision of an improved form of take-down screw which will lie substantially flush with the lower smooth surface of the forearm so as not to interfere with the holding of the firearm nor be uncomfortable nor inconvenient in use.

Another object is to provide a take-down screw for a firearm, or gun, of the take-down type, by which the barrel may be more firmly and securely attached to the forearm than it can be by the use of any of the present forms of takedown screws.

Still another object is to provide a take-down screw adapted to be disposed in the forearm of a firearm substantially flush with the surface thereof and means, normally positioned within the screw head and adapted to be extended from the same to be readily grasped to rotate the screw when inserting it into, or removing it from, its operative position, to secure the forearm tothe barrel.

A further object is to provide an improved take-down screw for the above purposes which will be relatively inexpensive to manufacture, simple in construction, compact, of pleasing appcarance, and very eificient and durable in use.

With the above and other objects in view, which will appear as the description proceeds, there has been illustrated in the accompanying drawing one form in which the invention may be conveniently embodied in practice.

In the drawing, wherein like reference characters designate like parts throughout the several views:

Figure 1 is a side view of a take-down firearm, or gun, having a. take-down screw embodying the features and principles of this invention associated therewith;

Figure 2 is an enlarged cross-section through the firearm, or gun, taken on line 2-2 of Figure 1;

Figure 3 is a bottom plan view of the parts shown in Figure 2;

Figure 4 is a sectional view of the take-down screw of this invention taken on line 4-4 of Figure 3; and

Figure 5 is a perspective disassembled view of the parts constituting the take-down screw of this invention.

In most take-down firearms, or guns, the barrel ii is detachably secured to the forearm portion E2, of a gun stock is, by means of a screw, a threaded end M of which is adapted to screw into an internally threaded member, or post, l5 formed on, or suitably secured to, the barrel II. The threaded end M of the take-down screw is formed on the end of a stud I6 extending from the inner end i8 of the screw head I! and forms a shoulder l9 thereat. The shoulder I9 is adapted to seat against the bottom 2| of an escutcheon sleeve 22, set into the material of the forearm portion 52 in a counterbore provided therein and in alignment with the post 15 on the barrel l l, the screw end M and stud 16 passing through a hole 26 in the bottom 2!, which hole 28 may be threaded, as shown. The outer surface of the outer end 23 of the screw head il, when the shoulder i9 is seated upon the bottom 2! of the sleeve 22, is substantially flush with the outer surface 24 of the forearm. portion l2. The outer end 23 of the screw head I! is shown as being of a larger diameter than the inner end i8 thereof, and has a diametrically extending slot 25 formed therein. The slot 25 extends into the inner end iii to adjacent the shoulder l9 and is adapted to slidingly receive a screw actuating blade 26 which extends entirely across the screw head ii to be guided in its sliding movements axially with respect to the screw by the interior sides of the sleeve 22.

The blade 26 is frictionally retained in any position within the slot 25 by a plunger 21, which is disposed in a laterally directed hole 28 extending diametrically across the outer end 23 of the screw head l8 at right angles to the slot 25. The plunger 21 is constantly urged into engagement with one side of the blade 26 by a coiled spring 29, which reacts between the end of the hole 28 and the inner end of the plunger 21. The plunger 21 is provided with a lug 3!, which is received in a slot 32 extending lengthwise of the blade 26. The slot 32 ends short of the inner end of the blade at one of its ends and extends outwardly into a cross-slot 33 disposed adjacent the outer end of the blade 26. By means of this construction, the blade 26 may be pulled out of the slot 25 until the blade at the inner closed end 34 of the slot 32 engages the lug 3!, the end 34 by such engagement acting as a stop to limit the outward movement of the blade 26. A depression 35 is formed in the end surface of the head end 23 to facilitate the thumb and finger of the user grasping the blade end 36 at the cross-slot 33 to withdraw the blade 26 from the slot 25 into the screw actuating position indicated in dotted lines in Figures 1, 2 and 4.

One of the prior forms of take-down screws, over which the present one is an improvement, was provided with a knurled head to be grasped by the thumb and finger of a user to rotate the same. The take-down screw illustrated provides the flat blade 25 for the purpose of rotating the same, and it has been found that a screw, embodying the features and principles of this invention, may be more tightly threaded into the post l5 to rigidly secure the barrel II to the forearm portion I2 and by the use of less force in so doing than one having a knurled head. It has also been found that less force is required to unloosen such a take-down screw, when it is desired to remove the same to permit separation of the' barrel from the forearm while taking down a gun of this type.

When the gun is in assembled condition, as shown in Figure 1, the blade 26 is fully disposed in the slot 25 and is firmly retained therein by the spring pressed plunger 21 with its outer end substantially flush with the forearm outer surface. When in such position, the blade 26 and screw head end 23, both being substantially flush with the forearm surface, present no uncomfortable or inconvenient protuberance at this point, and no interference in handling the gun is experienced. Threading the hole 20 prevents the threaded screw end M from accidently falling through this hole when it is removed from the post I5 and thereby secures the screw to the sleeve 22 against accidental removal. When it is desired to take down the gun, the user withdraws the blade 26 from the slot 25 by grasping it at the cross-slot 33, this being facilitated by this cross-slot 33 and the depression 35 in the end surface of the screw head end 23. withdrawing the blade 26 from the screw end 23, it is used to rotate the take-down screw to screw it into, or out of, the post I5. After such use the blade 26 may be pressed into the screw head wherein it will be retained by the plunger 21.

While there has been shown and described herein a particular form of take-down screw embodying the features and principles of this invention, it will be understood that the invention may be embodied in other forms without. departing from the spirit or essential attributes thereof. It is therefore desired that the present embodiment be considered in all respects as illustrative and not restrictive, and it will be further understood that each and every novel feature and combination thereof, present in, or possessed by, the device herein disclosed, forms a part of the invention included inthis application.

What is claimed as new and for what it is desired to secure Letters Patent, is:

1. In a take-down screw for a firearm, a threaded end portion, a head portion having a slot extending diametrically across its outer end, a blade slidably mounted in the slot for adjustment in said head portion and to be drawn out of the slot into a screw actuating position, a spring pressed plunger engaging said blade to frictionally retain it in its adjusted positions relatively to the head portion, said blade having a lengthwise slot therein, and a lug on said plunger to enter the slot in said blade to guide the blade in .itsmovements in the head portion and limit its outward movement. 1

2. In a take-down screw for a firearm, a

After 7 spring pressed plunger engaging said blade to frictionally retain it in its adjusted positions relatively to the head position, said blade having a lengthwise slot therein, and a lug on said plunger to enter the slot in said blade to guide the blade in its movements in the head portion and limit its outward movement, said blade also having a cross-slot adjacent its outer end and said head portion having a depression in its outer end surface to facilitate the grasping of said blade by the fingers of a user.

3. In a take-down firearm, a take-down screw adapted to hold adjacent parts of said firearm together, said screw having a threaded portion to enter a first of said firearm parts, a head portion to enter the second of said firearm parts and be disposed substantially flush with its outer surface, said head portion having an axially directed slot extending diametrically across its outer end, a flat blade slidably mounted in the slot with its outer end flush with the outer end of said head portion and adapted to be drawn axially with respect to the screw out of the slot into a. screw actuating position, and means passing through the blade and adapted to frictionally engage a side of said blade to retain said blade within the slot and when in screw actuating position.

4. In a take-down firearm, a take-down screw adapted to hold adjacent parts of said firearm together, said screw having a threaded portion to entera first of said firearm parts, a head portion to enter the second of said firearm parts and be disposed substantially fiush with its outer surface, said head portion having a slot extending diametrically across its outer end, a blade slidably mounted in the slot for adjustment in said head portion and to be drawn out of the slot into a screw actuating position, a spring pressed plunger engaging said blade to frictionally retain it in its adjusted positions relatively to the head portion, said blade having a lengthwise slot therein, and a lug on said plunger to enter the slot in said blade to guide the blade in its movements in the head portion and to limit its outward movement.

7 5. In a take-down firearm, a first firearm part having a threaded hole, a second firearm part having a counterbored hole in axial alignment with the threaded hole in said first part, a sleeve disposed in the counterbored hole of said second part, and a screw having a threaded end to cooperate with the threaded hole in said first part and a head to enter and seat beneath the outer surface of the second part in said sleeve disposed in the counterbored hole therein to clamp the parts together, said screw head having a slot extending diametrically across the same, a fiat blade in the slot extending entirely across said grasped to rotate the screw.

HAROLD F. MOSSBERG.

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