US 3371930 A
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Description (OCR text may contain errors)
Matth 5, 1968 YOsHlQ SH|GA 3,371,930
EXTENSIBLE NIGHT STICK Filed Oct. 6, 1965 INVENIOR. l mw 2) W Y BY United States Patent O 3,371,930 EXTENSIBLE NIGHT STICK Yoshio Shiga, 128 Z-chome, Nakamachi Nerima-ku, Tokyo-to, Japan Filed Get. 6, 1965, Ser. No. 493,325 1 Claim. (Cl. 273-84) ABSTRACT OF THE DISCLOSURE The present invention relates to a night stick, and more particularly to an extensible night stick convenient for a policeman to carry and use for self-defense.
The invention will be described hereinbelow in detail in connection with the accompanying drawings, wherein:
FIG. 1 is a partially cutaway elevational view of a night stick assembly of the present invention as extended;
FIG. 2 is an elevational view showing the same stick assembly as telescopically contracted;
FIG. 3 illustrates an enlarged side sectional view of portion A of FIG. 1; and
FIG. 4 is an enlarged side sectional View showing portion B of FIG. l.
Referring to FIG. 1 of the drawings, a top tube 1 has a top cap 1 screwed in the upper end portion thereof. Said top cap 1 is provided for facilitating to telescope a central tube 7 into a base tube 8, as will be described later, in order to contract the night stick assembly of the present invention. In the lower portion of said top tube 1 there is formed a slot for mounting a forwardly sloped lever 5 therein (FIG. 3). As` best shown in FIG. 3, metal inserts 2 and 3 are xedly and opposedly inserted internally of the top tube 1 with the slot therebetween so as to form a space or cavity in top tube 1.
In the space or cavity of the top tube 1 there is accommodated an arcuate leaf spring 4 having the upper end fixed to the metal insert 2 and the lower end slidably engaged with the inclined surface of the metal insert 3. A forwardly sloped lever 5 having stepped end portions is movably mounted in the slot of the top tube 1. The inner side of lever 5 is concavely shaped so as to match the corresponding portion of said arcuate spring 4 and is in engagement therewith. The forwardly sloped configuration of lever 5 permits the lever to readily and smoothly slide into a stopper ring 7' mounted in the upper end portion of central tube 7 when the top tube 1 is telescoped into the central tube 7.
Another stopper ring 6 is attached to the outer circumference of the lower end portion of .top tube 1, and the lower end of this ring 6 is rounded so that in telescoping the night stick, said rounded lower end of ring 6 can smoothly clear the inwardly projected end portion of a substantially U-shaped spring shoe to enable top tube 1 to readily move into base tube 8.
The central tube 7 has a slightly greater diameter than top tube 1 so that the tube 7 may readily receive the tube 1 therein. Further, the central tube 7 has a slightly smaller length than the top tube 1 in order that the stopper ring 6 in the lower portion of tube 1 may halfway clear the inwardly projected end portion of the substantially U- shaped spring shoe 10 earlier than the lower end of the central tube 7, which subsequently clears the spring shoe 10 to slide into the base tube 8. Stopper rings 7 and 7" are respectively tted to the upper inner and lower outer circumferences of said central tube 7. The lower end of said stopper ring 7" in the lower portion of the tube 7 is also rounded so as to readily clear the inwardly projected U-shaped spring stopper when the central tube 7 is telescoped into the base tube 8.
Referring to FIG. 4, the base tube 8 is somewhat greater in diameter than the central tube 7 so as to facilitate the telescoping of tube 7 into tube 8. A stopper ring 8 is attached to the inner circumferential surface of the upper portion of the base tube 8. In order that the central tube 7 may not return into the base tube 8 when the stopper ring 8 comes into engagement with the stopper ring 7 in the lower portion of the central tube 7, the U- shaped spring shoe 10 adapted for stopping the lower end of said central tube 7 is disposed in a bore formed in the base tube 8 through a flange 9 underlying the stopper ring 8. A spring 11 is disposed through said spring shoe 10 with the outer end portion thereof projected from the spring shoe 10, and the projected outer end of said spring 11 is held by a cap 9'. A base cap 12 is screwed in the lower end of the base tube 8 so as to prevent the top tube 1 and the central tube 7 from moving upwardly or backwardly when said tubes 1 and 7 are successively telescoped into the base tube 8. The major portion of the outer circumferential surface of the base tube 8 is coated with a leather of agreeable touch for preventing the tube 8 slipping from the users hand.
As will be seen from the construction described above, the night stick of the present invention may be assembled in such a manner that the central tube is inserted into the base tube 8 through the lower open end thereof, thereafter the top tube 1 is inserted into said central tube 7, and tinally a base screw 12 is screwed in said lower end of tube 8 while the top cap 1' is fitted in the upper end of tube 1 (FIG. 2). The thus assembled night stick in its telescoped state may be perfectly convenient for a policeman to carry with him.
When the night stick as carried by the user is forcefully shaken, in case of need, with the base tube 8 grasped by the users hand, the central tube 7 runs out of the base tube 8 thereby causing the stopper ring 7 in the lower end portion of the central tube 7 to come into engagement with the stopper ring 8 in the upper end portion of the base tube 8 while the top tube 1 is also forced out of the central tube 7 with a result of the stopper ring 6 in the lower end portion of the top tube 1 coming into engagement with the stopper ring 7 in the upper end portion of the central tube 7. At the same time the top tube 1 is fixed at the upper end of the central tube 7 by means of the lower stepped end ofthe lever 5 which has been forced outwardly by spring 4. Thus the night stick is now in its completely expanded state suitable for attack or defense.
When the top cap 1 is pushed downwardly while the lever 5 being pushed laterally inwardly by a linger of the user, the top tube 1 is forced into the central tube 7 until the top cap 1 reaches the upper end of the central tube 7, which in turn is forced by the top cap 1 into the base tube 8. Thereupon, the lower end of the top tube 1 first reaches the U-shaped spring shoe 10, and the lower end of the central tube 7 is positioned in the gap formed by the rounded end portion of the stopper ring 6 tted in the outer circumference of the tube 1 and the rounded projected end portion of the U-shaped spring stopper. When the stopper ring `6 of the tube 1 has cleared the U-shaped spring shoe 10, the lower end of the central tube 7 subsequently clears the U-shaperl spring shoe 10 so that both the top and central tubes 1 and 7 are smoothly forced into the base tube 8 thereby forming the whole stick assembly in a small length suitable for carrying.
Although a preferred embodiment of the invention has been described and shown in detail, it should `be understood that many modifications in various parts are possible without departing from the spirit and scope of the appended claim.
What I claim is:
1. An eXtensible night stiok assembly comprising a base tube including a stopper ring tted to the inner circumference of the upper end portion thereof, a ange formed with a bore therethrough and fixed to the outer circumference of said base tube below said stopper ring, a U- shaped spring shoe loosely tted in said bore, a spring disposed in said spring shoe, and a base cap screwed in the lower end of said base tube; a central tube inserted in said base tube, said central tube including stopper rings respectively fitted to the upper inner and lower outer circumferences thereof; and a top tube inserted in said central tube, said top tube including a slot formed in the lower end portion thereof, metal inserts fixed in said top top tube with the slot therebetween, a leaf spring and a ,4 lever secured in said top tube by means of said metal inserts, and a top cap screwed in the upper end of said top tube.
References Cited UNITED STATES PATENTS 2,757,002 7/1956 Ryden 273--67 3,081,999 3/1963 Harris 272-57 FOREIGN PATENTS 16,565 7/1902 Great Britain.
RICHARD C. PINKHAM, Primary Examiner.
T. ZACK, Assistant Examiner.