Patent US4197666A successfully refreshed from Google Patents.
US4197666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dual caliber revolver
Assignee: United States Department of the Army
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Filing: 1978-04-24
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Granted: 1980-04-15
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Expires: 1998-04-24
Abstract
Abstract The benefits of a dual caliber gun have been set forth in various periodis. Dual caliber revolvers come into consideration as training weapons. Dual caliber revolvers are also important in survival situations, for example downed aircraft or lost hunters. Prior art dual caliber pistons have one barrel below the other one. Such guns possess an inherent accuracy disadvantage. In addition the internal mechanisms of the guns differ so drastically from standard guns that manufacture is expensive and reliability questionable. A more reliable dual caliber gun is provided herein which has a single trigger, normal spring action, and an unmodified firing mechanism.
Inventors
- 👤 Gim S. Ng
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:08
CPC Classifications
F; F41; F41A; F41A19/00; F41A19/06; F41A19/18; F41A19/19; F41A19/21; F41A19/22; F41A19/14; F41A21/00; F41A21/06; F41C; F41C3/00; F41C3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
148 words
In a dual caliber revolver of the type having: (1) a frame, (2) two barrels attached thereto, (3) a means for supporting the two barrels so that one is beside the other, (4) a cylinder having the two sizes of cartridge chambers alternately concentrically arranged and adjacently aligned to register with their respective barrels, (5) a pair of firing pins mounted laterally in the frame, each pin being in alignment with its barrel and with the cartridge chamber registering therewith, and (6) means carried by the hammer for selectively striking one of the firing pins comprising (a) a firing pin striker plate, (b) keyway means rendering the striker plate slideable from one side of the hammer to the other, (c) pin means cooperating with recesses for locking said plate in position to strike one of the firing pins and to preventing it from sliding out of the keyway.
Claim 2
Dependent Claim
148 words
In a dual caliber revolver of the type having: (1) a frame, (2) two barrels attached thereto, (3) a means for supporting the two barrels so that one is beside the other, (4) a cylinder having the two sizes of cartridge chambers alternately concentrically arranged and adjacently aligned to register with their respective barrels, (5) a pair of firing pins mounted laterally in the frame, each pin being in alignment with its barrel and with the cartridge chamber registering therewith, and (6) means carried by the hammer for selectively striking one of the firing pins comprising (a) a firing pin striker plate, (b) keyway means rendering the striker plate slideable from one side of the hammer to the other, (c) pin means cooperating with recesses for locking said plate in position to strike one of the firing pins and to preventing it from sliding out of the keyway.
References Cited (Backward Citations)
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US467558A
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US627966A
Cited
US943819A
Cited
US990669A
Cited
US1042145A
Cited
US3093922A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1983-04-15 | 1983-10-15 | 1984-04-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-04-15 | 1987-10-15 | 1988-04-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-04-15 | 1991-10-15 | 1992-04-15 | $7700.00 | Window Closed / Lapsed |