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Publication numberUS1247430 A
Publication typeGrant
Publication dateNov 20, 1917
Filing dateMar 1, 1916
Priority dateMar 1, 1916
Publication numberUS 1247430 A, US 1247430A, US-A-1247430, US1247430 A, US1247430A
InventorsHenry F Loomis
Original AssigneeHenry F Loomis
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1247430 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)



Patented Nov 20, 1917.

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rammin I .1 @Reading, in the county of Berks and State of Pennsylvania, have inventedcertain new H Jand useful Improvements in Projectiles, of

which the following is a specification. ,3 My invention relates particularly to ex- :plosive projectiles adapted for use in trench warfare or for like purposes, andmy main objectis to provide for securing the maximum destructive effect upon trench structures adjacent the point of impact with the ground. v e j Ordinarilymthe maximum effect has not I been produced because of the, undue pene- ,tration of the earth occurring before explosion of the charge; and my invention consists in an improved construction of the ,20 nose portion of the projectile whereby such excessive penetration will be prevented, while at the sametimethe axial line of the projectile will be held true to its line of flight as heretofore.

Figure l is an elevation ofa shell embodymyinvention in preferred form.

ig. 2 is a longitudinal section of the same. X

In the specific form shownin the drawing or represents a cylindrical shell of ordinary bya partition wall 0 screwed into the open a forward end thereof; and d represents a det- 'l onating device in the form of an adjuste able fuse secured in the partition 0 and exvjltending into the charge chamber 72 to explode the charge containedtherein at a predetermined time. 7

In order to secure the most effective results from such explosive shells especially when directed against entrenchments, the modern practice has been to set the fuse to explode the charge only after the shell has a struck and penetrated the earth; and the best results are attained when the explosion a occurs after penetrating the earth to a depth j 1 not very much exceeding that of the depth i of the trench against which it is directed. @The force with which the ordinary shell strikes the earth, particularly when dis- Specification of Letters Patent; P t nt d 20, 191 '7,

. Application filed March 1, 1916. Serial No. 81,522. i

form having an explosive chamber 6 formed charged at the great elevation commonly practised, causes it to penetrate to a great depth, and the force of the explosion which is effective in destroying the trench is greatly reduced. It is practically impossible to so time the fuse as to explode the shell during its penetrative movement, and I therefore provide for so forming the shell thatvit will travel through the air with a normal trajectory, but upon impact with the earth will be subjected to a retarding effect adapted to reduce its penetration and cause the shell to come to rest at a point not greatly below the bottom of an adjacent trench. To this end I provide the shell with a nose portion in the form of a hollow-cone frustum; the specific nose portion 6 illustrated in the drawing being screwed into the shell at f, and so shaped exteriorly as to rovide it with a modified conoidal end suc as is found to be desirable for maintaining true flight, though hollowed out so as to retard penetration. The usual pointed end of this hollow nose piece 6 is cut away to form an opening it to the hollowed-out chamber '11.

This opening it is large enough to admit the passage of the time setting tool for the fuse; and holes or slots 70 may be provided in the walls of the hollowed nose, arranged spirally or otherwise, as desired.

When discharged from the gun the conoidalnose'e will maintain axial alinement during the flight of the shell, the inrush of air through the opening it escaping through the holes is. Upon striking the earth the opening h will admit earth to the chamber a, which will flow through the holes is under the pressure, thus very effectively retarding penetration of the projectile.

My improved shell with its hollow retarding nose will permit timing the explosion of its charge so as to secure the most effective results, and shells will have effective results equal to or greater than much larger and highly explosive ones operating as heretofore, inasmuch as they will explode at a proper depth relative to the trench instead of a depth greatly below it. My improved nose construction may obviously be formed integral with the shell body, and be readily i modified in form within the limits of my inm fuse, and it. separately ;formed nose portion vention as defined iii/she claim; in the form of a, h011OWv( 3OI1 'fI1 1StuII;i having IVVhaJt 'I'cl'aim is:- '1 ,v afront Opening Sina'ller-thaflsaid end-clo- 10 A g' An explosive projectile 0Omprising'acy1in I sum and "walls I of substantially uniform '5jdri'cal shell, a; sepalfz telyfformed'jgnd-clqthickneg piovide d withiaper tupes. gsure the gfplgpi'bviglqdnwit QQ'iiiQdherqol iffixniwsigngiture.

' xpl'ding HENRY*F."LQOMIS.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US6405653 *Oct 26, 2000Jun 18, 2002Atlantic Research CorporationSupercavitating underwater projectile
US8127705Sep 16, 2009Mar 6, 2012The United States Of America As Represented By The Secretary Of The NavyWater entry system
WO2002068896A2 *Oct 25, 2001Sep 6, 2002Atlantic Res CorpSupercavitating underwater projectile
U.S. Classification102/499
Cooperative ClassificationF42B12/204