US1272759A - Hand-grenade. - Google Patents

Description

1. F C. YTTRUP.

HAND GRENADE.

APPLlCATlON FILED FEB. 4, ma.

Patented July 16, 1918.

WiT ESSES INVENTOR m: Nome: Pr'lFRs m, mmwumc WASHVNGIUN. my C,

n sm- T IFFTGE.

HAND GRE ADE.

, Specification of Letters Patent.

Patented uly 16, 1918.

Application filed February 4, 1918. Serial No. 215,246.

To all whom itmay concern:

Be it known that 1, JOHN FJG. Y'r'rirur, a subject of the King oiiDcnmark, and a resident of Pittsburgh, in the county of Allegheny and State of Pennsylvania, have invented a new and useful Improvement in Handfirenades; and I do hereby-declare the following to be a full, clear, and exact! description th ercof- This invention relates to bombs or projectiles, and more particularly to grenades adapted primarily for hand throwing, and has for one of its principal objects the provision of a device of this class that maybe safely handled by the operator without danger of premature explosion.

Another object is the provisionof a. grenade that will explode at a predetermined time, and one in which the detonator will be fired by the action of the device passing through the air. i

' Other objects, such as simplicity and cheapness in manufacture, will be more fully brought out in the specification and illustrated in the accompanying drawings, in

which:

Figure 1 is a sectional view through a complete grenade embodying my invention;

Fig. 2 is a sectional view at right angles to Fig. 1.

Referring more particularly to the drawings, the numeral 2 designates the body portion of my. grenade; which is preferably composed of tin and made pear shaped in order that it may be readilygrasped by the operator, and also to facilitate its travel through space. The upper or small end of thebody is screw-threaded to receive a cap 3, having a centrally arranged aperture 4 in the end 3 of said cap. The upper or small end of the body portion 2 has an internal flange 5 formed adjacent its terminal. A tube like receptacle 6. having a flange 7 is adapted to extend within the body poriion 2 and be supported by the flange 5i i l The body portion 2 is adapted to be filled with any well known explosive 8 requiring a shock to set it off, and to have at its head or large end an inner head 9 of cast metal Or other charge. The head 9, which I prefer formed of cast metal, is crossed by separation channels 10 at intervals, such channels or lines running at right angles to each other so as to divide such inner head into small squares which will separate when the device explodes.

The tube-like receptacle (5 is partially filled with a strong explosive 11, such as mercury powder, and contains a. fuse strip. 12 which has slow burning qualities and which will burn predetermined time, as for example {i-th inch per second. i

An invertedcup-shaped member 13 is mounted above the cap 3 and contains a coil spring let. An ignition wire 15 is secured to the cup 13 and extends through the aper ture i and within the receptacle 6, and has. an inflammable headlG.

. The spring 11- is ot'such length that' it must be comprcssedunder the cup .13 in orderto allow the wire 15 which is secured to such cup to extend within the receptacle' i, and when COIl'l'PlQSSGd'llZ is held in position by the locking arms 17 whichv are securedto thesidcs of cap 3 and bent "over .the cup 13. v i f.

The arms 17 areheld in position"overthev cup member 13 by the cord 18 which is wrapped around the'free ends of such .arms

, and has its one end trained"downwardly under the inclo sing tube or neck 19, which is removably secured to the small end of the body portion 2. The cord 18 is then)- trained upwardly and has itsend secured-in a'stoppermember or cork 20 adapted to be secured in the tube or neck 19.

The operation of the device is as follows: The device. being assembled and filled with the suitable explosives, the operator will grasp it so use the large end will leave his hand first; he willremove the cork or stopper 20'which is composed of light mate rial, such as cork or wood; he will thenremove the neck 19 and grasp the stopper 20 under the thumb of-the throwing hand.

The operator will then throw the'device into the air in aforward direction, and the pear shape of the body portion will cause such body to travelwith its large or head end inclined toward the ground. Such po sition will aid in scattering the-charge or inner head 9. f j i The stopper or'corklfi, -beiug-light,-will travel to the rear of the device at the length ofthe string or cord 18. The peculiar shape of the body portion 2 and the manner in which 'it is gripped by the operator will cause the device to have a whirling action when. thrown into the air. The circling or whirling action of the body 2 will cause the cord 18 to unwind from the locking arms 17 thus releasing the same and permitting spring 14 to force the cup member 13 up Ward, thereby causing the head 16 on the wire 15 to ignite This is due to the friction caused by the head 16 in passing through the aperture 1 in cap 3 striking the sides of said aperture. Vhen the head 16 ignites it will start the fuse 12 and thus set ofi the charge 11 which acts as a. detonator to set off the main explosive charge 8.

'It will thus be seen that it is impossible for a grenade constructed according to my invention to prematurely explode thus injuring-the operator and companions.

It will be understood thatthe cord 18 may be wrapped around the arms 17 any number of times desired, thus" increasing or decreasing the length of time required for the device to explode after beingrthrown into the air.

Although I- have shown and described my invention in combination with a specific form of grenade, it will be understood that various changes may be made in design and 2-. A projectile comprising a body portion 1 to contain explosive, a detonating tube with in said body portion, .an automatic igniown means, said means comprising a spring accelerated stem extending within said tube,

means for locking said stem, in inoperative 'position, said means comprising locking arms bent over said stem to depress the same, and means for releasing said arms.

3. In a hand grenade, a detonator comprising a tubular receptacle partially filled with an explosive, a fuse within said receptacle, an ignition stem extending into said receptacle to ignite said fuse, a spring member compressed under a cup member, a pair of locking arms adapted to be bent over said cup to hold saidspring in its compressed position, and a flexible cord "member wound around the free ends of said arms to hold them in position, said cup being secured to grooves 011 its inner surface at intervals and extending at right angles to each other dividing said head into small squares to facilitate its breaking apart when the device is exploded, and a detonator for discharging said explosive.

5. A hand grenade comprising a pearshaped body portion composed of thm metal to contain an explosive, a detonator for said I explosive, said detonator comprising-a tubularreceptacle partially filled with an explosive, a fuse within said receptacle, an ignition stem extending into said receptacle to ignite said fuse, a spring member compressed undera cap, a pair of locking arms bent over said cup members to hold said spring in its compressed position, and a flexible cord member adapted to be wound around the free ends of said arms to hold them in position, said'cup being secured to said ignition stem,'and said stem being ignited .when said spring andcup are released.

6. A" hand grenade comprising a pearshaped body portion composed of relatively thin metal to-contain an explosive, a head of relatively thick cast metal having dividing lines therein to facilitate it breaking apart When the device is exploded, a detonator for discharging said explosive, said detonator comprising a tubular receptacle partially filled with an explosive, a fuse within said receptacle, an ignition stem extending'into said receptacle to ignitesaid fuse, a spring 7 member compressed under a cup member, a

pair of locking arms bent over said cup.

member to hold said spring in its compressed 'pos1t10n, and a flexlble cord member wound around the free ends of said arms to hold them in position, said cup being se- F. C. YTTRUP, have hereunto setmy hand.

' JOHN F. o. YTTRUP.

I Witnesses V r J. N. COOKE,

J. M. GEVOGHEGAVN.

Copies of this patent may be obtained for five cents each,.by addressing the Commissioner of 'Patents,

Washington, D. C.

.cured to said ignition stem, and said stem

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