US256684A - Alfeed james hobbs - Google Patents
Alfeed james hobbs Download PDFInfo
- Publication number
- US256684A US256684A US256684DA US256684A US 256684 A US256684 A US 256684A US 256684D A US256684D A US 256684DA US 256684 A US256684 A US 256684A
- Authority
- US
- United States
- Prior art keywords
- anvil
- hobbs
- cup
- james
- alfeed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- USXDFAGDIOXNML-UHFFFAOYSA-N fulminate Chemical compound [O-][N+]#[C-] USXDFAGDIOXNML-UHFFFAOYSA-N 0.000 description 6
- 229910001369 Brass Inorganic materials 0.000 description 4
- 239000010951 brass Substances 0.000 description 4
- 210000002445 Nipples Anatomy 0.000 description 2
- 238000004880 explosion Methods 0.000 description 2
- 239000011888 foil Substances 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F42—AMMUNITION; BLASTING
- F42C—AMMUNITION FUZES; ARMING OR SAFETY MEANS THEREFOR
- F42C19/00—Details of fuzes
- F42C19/08—Primers; Detonators
- F42C19/10—Percussion caps
Definitions
- My invention is an improvement upon that class of primers for cartridges in which the anvil is a metallic plate placed flatwise in the cup and held in position by the friction of a [0 portion of its periphery upon the inner concentric surface of the cup.
- My improvement consists in providing the inner face of such anvils with a central proje-ction or boss, which, when the anvil is inserted, bears upon the fulminate in the cup and insures the explosion of the fnlminate by the blow of the firing-pin.
- Figure 1 is a view of the inner face of the primer, showing the anvil in position.
- Fig. 2 is a section of the primer through the line was on Fig. 1.
- Fig. 3 is a view of the anvil detached fromthe cup.
- Fig. 4 is a section of 5 the anvil through the line y y on Fig. 3.
- the anvil A which is inserted in the cup 13, has its opposite ends each formed in several planes, and thereby presents upon its pcriphery a number of corners, which bear upon the inner surface of the cup with such friction as to hold the anvil firmly in place.
- the fulminate O is placed within the cup and covered with tin-foil D in the usual manner.
- the anvil is provided upon its inner face with the central projection or boss, (1., which, as will be seen, bears upon the mass of fulminote in the middle of the cup.
- Anvils of this character are stamped out of a brass plate of suitable thickness by means of apunch anddie.
- annularly-corrugated an vils for primers have been made from thin sheet metal. Such anvils, however, were provided with concentric flanges, and were held in place by the bearing of the flanges upon the interior of the cup.
- the anvil which I employ is made of brass plate, and has no flanges, and is fastened in the cup by the bearing of portions of its periphery upon the interior of the cup.
- VVh-at I claim as my invention is- 6
- the metallic plate or anvil A provided upon its inner face with the central boss, a, and presenting upon its periphery a number of sharp corners for engagement with the interior of thecupB,substantiallyasshownauddeseribed. 7o
Description
(No Model.)
A. J. HOBBS.
PRIMER FOR CARTRIDGES.
No. 256,684. Patented Apr.18,188Z.
I UNITED STATES PATENT OFFICE.
ALFRED JAMES HOBBS, OF BRIDGEPORT, CONNECTICUT, ASSIGNOR TO THE UNIOh METALLIC CARTRIDGE COMPANY, OF SAME PLACE.
PRIMER FOR CARTRIDGES.
SPECIFICATION forming part of Letters Patent No. 256,684, dated April 18, 1882.
Application filed February 2, 1852. (No model.)
To all whom it may concern:
Be it known that I, ALFRED JAMES Hones, of Bridgeport, Connecticut, have invented a certain Improvementin Primers for (Jartrid ges,
of which the following is a specification.
My invention is an improvement upon that class of primers for cartridges in which the anvil is a metallic plate placed flatwise in the cup and held in position by the friction of a [0 portion of its periphery upon the inner concentric surface of the cup.
My improvement consists in providing the inner face of such anvils with a central proje-ction or boss, which, when the anvil is inserted, bears upon the fulminate in the cup and insures the explosion of the fnlminate by the blow of the firing-pin.
The accompanyingdrawings,illustrating my invention, are as follows:
Figure 1 is a view of the inner face of the primer, showing the anvil in position. Fig. 2 is a section of the primer through the line was on Fig. 1. Fig. 3 is a view of the anvil detached fromthe cup. Fig. 4 is a section of 5 the anvil through the line y y on Fig. 3.
On reference to the drawings, it will be seen that the anvil A, which isinserted in the cup 13, has its opposite ends each formed in several planes, and thereby presents upon its pcriphery a number of corners, which bear upon the inner surface of the cup with such friction as to hold the anvil firmly in place. The fulminate O is placed within the cup and covered with tin-foil D in the usual manner.
The anvil is provided upon its inner face with the central projection or boss, (1., which, as will be seen, bears upon the mass of fulminote in the middle of the cup. Anvils of this character are stamped out of a brass plate of suitable thickness by means of apunch anddie.
To produce the boss 0., 1 form a projecting nipple upon the central portion of the punch, so that the anvil is stamped out and the boss formed upon it in one operation.
I am aware that annularly-corrugated an vils for primers have been made from thin sheet metal. Such anvils, however, were provided with concentric flanges, and were held in place by the bearing of the flanges upon the interior of the cup.
The anvil which I employ is made of brass plate, and has no flanges, and is fastened in the cup by the bearing of portions of its periphery upon the interior of the cup.
1 preferably form those portions of the pe- ,riphery of the anvil-plate which bear upon the interior of the cup in planes, so as to present sharp corners, as and for the purpose described in Letters Patent of the United States No. 183,925, dated October 31, 1876, granted to A. O. Hobbs for improvement in primers.
I do not claim broadly a primer-anvil having upon its inner face acentral projection for bearing upon the fulminate; but
VVh-at I claim as my invention is- 6 The metallic plate or anvil A, provided upon its inner face with the central boss, a, and presenting upon its periphery a number of sharp corners for engagement with the interior of thecupB,substantiallyasshownauddeseribed. 7o
ALFRED JAMES HOBBS.
Witnesses:
A. O. Hones, HENRY G. RYLANDS.
Publications (1)
Publication Number | Publication Date |
---|---|
US256684A true US256684A (en) | 1882-04-18 |
Family
ID=2325973
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US256684D Expired - Lifetime US256684A (en) | Alfeed james hobbs |
Country Status (1)
Country | Link |
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US (1) | US256684A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3439618A (en) * | 1967-09-21 | 1969-04-22 | Dynamit Nobel Ag | Wet charged percussion cap |
-
0
- US US256684D patent/US256684A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3439618A (en) * | 1967-09-21 | 1969-04-22 | Dynamit Nobel Ag | Wet charged percussion cap |
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