|Publication number||US1899925 A|
|Publication date||Mar 7, 1933|
|Filing date||Apr 28, 1932|
|Priority date||Apr 13, 1931|
|Publication number||US 1899925 A, US 1899925A, US-A-1899925, US1899925 A, US1899925A|
|Inventors||Emanuel Brofelth Gustav|
|Original Assignee||Malcus Holmquist Ab|
|Export Citation||BiBTeX, EndNote, RefMan|
|Referenced by (5), Classifications (6)|
|External Links: USPTO, USPTO Assignment, Espacenet|
March 1933. G. E. BROFELTH WADDING FOR WHALE GUNS Filed April 28, 1932 Fig.1. F192.
6.5.Brofc [#1 Patented Mar. 7, 1933 GUSTAV EMANUEL BROFEL'I'I-I, OF HALMISTAD SWEDEN, ASSIGNOR TO AKTIEBOLAGET QMALCUS HOLMQUIS'I, OF HALMSTAD, SVTEDEN I whnnlrre FOR WHALE GUNS Application filed April 28, 1932, Serial No. 608,080, and in Norway April 13, 1931.
This invention relates to a wadding for whale guns or the like consisting of a plu rality of round plates placed upon each other and kept together as a unit with end pieces of rubber or the like. 7
One object of the invention is to obtain the most suitable yielding power between projectile (harpoon) and charge of gunpowder in the firing moment. A further object is to provide the best possible tightening means although the wadding at the same time is of such a size that it can be easily introduced into the gun barrel.
The elastic properties of a gunwad are of greatest importance in order to obtain the same shooting results from one shot to another. A harpoon, for instance, can easily be damaged (deformed), if the elasticity is insuiiicient and the shots will be irregular. A good tightening entails that the powder gases do not tear asunder the wadding in the firing moment, but that always the same high discharge speed is obtained and as a result thereof a great range and even shooting results.
The characteristic feature of this invention is that the plates alternately are of different diameter and that the larger plates consist of a soft and elastic material, such as felt, while the smaller plates consist of a harder material.
The yielding power is obtained by means of the felt but may also be produced thereby that adjacent plates are convex in the same or opposite directions and in the same or different degree. Although these plates rest against each other they are not pressed close together, but admit of a further pressing together during the firing, by means of which the kick against the harpoon base ismodified. This elasticity can be obtained merely by a sufiicient'softness of the plates. They can consist of relatively thin elastic plates of metal or pasteboard to alternate with rela tively thick plates of fulled felting.
If plates of harder and more soft material alternate, and moreover the diameter of the harder or stiffer, i. e. the less elastic plates is made equal to or smaller than the calibre of the gun barrel, and the diameters of the more soft plates larger than the calibre, the best result is obtained, because when pressed together during the firing the soft plates spread a little and press with their edges against the walls of the gun barrel, so that a good packing for the powder gases is secured. WVhen the wadding is not pressed to gether it is consequently thinner than during the firing and can therefore easily be inserted into the gun barrel.
The attached drawing shows by way of ex-, ample difierent forms of the invention.
Figs. 1 and 2 show the complete wadding seen from the side and Figs. 3-6 some of itsother plate 2 is made of soft or supple material, e. g. felting, and the plates 3 of harder or stifier material, such as pasteboard 0 metal.
The soft plates 2 have a larger diameter than the gun calibre, and the hard plates 3 preferably a little smaller diameter than the gun calibre. When the soft plates are made convex, as the plates2a in Fig. 3, and the intervening plates 3a are p1ane, an elasticity ensues at the pressing together axially, not only on account of the suppleness of the plates 20 but also as a result of their convex form. When pressed together the material in the plates 2a is moved outwards against the walls of the gun bore. In .Fig. 4 the plates 2?) are made thicker in the middle.
Also in this event the plates 2?) become extended radially when pressed by the plates 36, and a. good packing against the walls of the gun bore is procured. The plates can so I.
have also other forms. The larger plates 20 can thus be arranged in pairs and be convex or conical with the bases against each other,
as shown in Fig. 5. And the plates 30 can They can also be ar 2d outwards against the walls of the gun The plates are held together in a suitable manner, for instance by a metal wire 8 pulled through, so that the wadding and the charge of gunpowder constitute a unit. One or several of the foremost plates 2, 3 next to the plate 1, are soaked in tallow or other fatty substance in order to prevent water from coming into the gunpowder.
The India rubber plate La in Fig. 2 can be provided with grooves 7 which form intervening flanges similar to the flanges formed by the plates 2 and 3 and lying against the wall of the gun bore and constitute a good packing for the gunpowder gases, in order to protect the felt plates against the powder gases during the firing. The plate 40; can also be formed of several thin plates of mutually different diameter and degree of hardness' I claim 1. Awadding for whale guns comprising a plurality of round plates upon each other and kept together as a unit, the plates being alternately of different diameter and the larger plates consisting of a soft and elastic material while the smaller plates consist of harder material, the soft platesbein planeand the hard plates being conical and arranged in pairs with the bases against each other. i
2. A wadding for whale guns comprising a plurality of round pla es upon each other and kept together as a unit, the plates being altern tely of different diameter and the larger plates consisting of a soft and elastic material while the smaller plates consist of harder material, the soft plates b ing plane and the hard plates being conical and arranged in pairs with the bases againsteach other, more than one pair of hard plates arranged between the soft plates.
3. A wadding for whale guns comprising aplurality of round plates upon each other and'kept together as a unit, the plates being alternately of different diameter, the larger plates consisting of fulled felting and the smaller. plates of pasteboard, the soft plates being plane and the hard plates being conical and arranged in pairs with the -bases against each other.
LA wadding for Whale guns comprising-a plurality of round plates upon each other and kept together as a unit, the plates being alternately of different diameter, the larger plates consisting of fulled felting and the smaller plates of-pasteboard, the soft of a metal wire.
plates being plane and the hard plates being conical and arranged in pairs with the bases against each other, more than one pair of hard plates arranged between the soft plates.
-5. Awadding for whale, guns. comprising aplurality of round plates uponeach other and kept together as a unit, the plates being alternately of different diameter, the larger plates consisting of fulled felting and the smaller plates of pasteboard, the soft plates 7 being plane and the hard plates being conical and arranged in pairs with "the bases against each other, more than one pair of hard plates arranged betweenthesoft plates, all the plates being held together by means In testimony whereof *1 have signed my name to this specification.
GUSTAV- EMANUEL BROFELTH.
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|US4694755 *||Apr 9, 1986||Sep 22, 1987||Esperanza Y Cia, S.A.||Shell for firing practice|
|US5750919 *||Feb 16, 1993||May 12, 1998||The United States Of America As Represented By The Secretary Of The Navy||Self-adjusting obturator for projectile launching|
|U.S. Classification||102/532, 267/165|
|International Classification||F42B7/08, F42B7/00|