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US3839984A Expired / Lapsed US ⏱️ 0.0 years remaining

Safe and arm mechanism for an embedment anchor propellant

Assignee: United States Department of the Navy
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Filing: 1973-05-29
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Granted: 1974-10-08
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Expires: 1993-05-29
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Abstract

Abstract A safe and arm mechanism, for igniting a propellant charge in an embedment anchor which comprises an out-of-line slider housing, two detonators, two adjustable ball release firing pins housed in a chamber above the detonators and actuated by a common piston, and a solenoid valve to admit water under pressure into the chamber. The solenoid valve receives its energy from the surface over a twin-conductor cable. When the mechanism is lowered in water beyond a certain depth after releasing the safety pin, a detonator plunger is moved under hydrostatic pressure so as to bring the detonators in line with the firing pins. When the solenoid valve is actuated by providing power to the solenoid valve, the firing pins are made to strike the detonators, thus setting off the propellant in the anchor barrel and driving the anchor firmly into the ocean floor.

Inventors

  • 👤 J Hinves
  • 👤 D Pimental

Bibliographic Details

Application Number —
Jurisdiction US
Data Source google_patents
Last Synchronized 2026-10-29 19:58
CPC Classifications
B; B63; B63B; B63B21/00; B63B21/24; B63B21/26; B63B21/28

Claims Analysis

Total Claims: 6
Claim 1
Independent Claim 269 words
A safe and arm mechanism for igniting a propellant charge in an embedment anchor which comprises: a block having a first end and second end, said block adapted to be demountably coupled to the embedment anchor at said first end and having a longitudinal ''''Y'''' opening at said first end, a lateral opening adjacent said Y opening and away from said first end, and a pair of generally parallel longitudinal openings adjacent said lateral opening and away from said Y opening; a pair of firing pins adjustably housed in said pair of generally parallel longitudinal openings in said block, said firing pins being longitudinally movable in generally parallel longitudinal openings; chamber means having a first end and a second end, said first end of said chamber being adjustably coupled to said block adjacent said second end of said block; an out-of-line slider adjustably positioned in said lateral opening in said block, said slider being selectively movable relative to said longitudinal openings and said Y opening to align said longitudinal openings, said firing pins and said Y opening; a pair of detonators housed in said out-of-line slider; a safety pin connected to said out-of-line slider to keep said pair of detonators in said out-of-line slider out of alignment with said pair of generally parallel longitudinal openings in said block; a piston housed in said chamber, said piston being in communication with said pair of firing pins; a solenoid valve means secured in said chamber proximate said second end of said chamber for selectively exposing said piston in said chamber to ambient hydrostatic chamber; means for actuating said solenoid valve means.
Claim 2
Dependent Claim 269 words
A safe and arm mechanism for igniting a propellant charge in an embedment anchor which comprises: a block having a first end and second end, said block adapted to be demountably coupled to the embedment anchor at said first end and having a longitudinal ''''Y'''' opening at said first end, a lateral opening adjacent said Y opening and away from said first end, and a pair of generally parallel longitudinal openings adjacent said lateral opening and away from said Y opening; a pair of firing pins adjustably housed in said pair of generally parallel longitudinal openings in said block, said firing pins being longitudinally movable in generally parallel longitudinal openings; chamber means having a first end and a second end, said first end of said chamber being adjustably coupled to said block adjacent said second end of said block; an out-of-line slider adjustably positioned in said lateral opening in said block, said slider being selectively movable relative to said longitudinal openings and said Y opening to align said longitudinal openings, said firing pins and said Y opening; a pair of detonators housed in said out-of-line slider; a safety pin connected to said out-of-line slider to keep said pair of detonators in said out-of-line slider out of alignment with said pair of generally parallel longitudinal openings in said block; a piston housed in said chamber, said piston being in communication with said pair of firing pins; a solenoid valve means secured in said chamber proximate said second end of said chamber for selectively exposing said piston in said chamber to ambient hydrostatic chamber; means for actuating said solenoid valve means.
Claim 3
Dependent Claim 53 words
The mechanism of claim 1 wherein said out-of-line slider comprises a plunger and a spring, said plunger being spring biased by means of said spring so as to keep said detonators out of alignment with said firing pins and said Y opening with said safety pin being in connection with said Out-of-line slider.
Claim 4
Dependent Claim 25 words
The mechanism of claim 2 wherein said pair of firing pins are spring biased inside said pair of generally parallel longitudinal openings in said block.
Claim 5
Dependent Claim 28 words
The mechanism of claim 3 which includes means for keeping said pair of firing pins out of contact with said detonators until energization of said solenoid valve means.
Claim 6
Dependent Claim 42 words
The mechanism of claim 4 wherein said means for keeping out said pair of firing pins out of contact with said detonators until energization of said valve means includes a pair of locking tubes having locking positions therein for said firing pins.

References Cited (Backward Citations)

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US2850974A Cited
US3018751A Cited
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US3154042A Cited
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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) 1977-10-07 1978-04-08 1978-10-08 $2000.00 Window Closed / Lapsed
7.5 Years (Year 8) 1981-10-07 1982-04-08 1982-10-08 $3760.00 Window Closed / Lapsed
11.5 Years (Year 12) 1985-10-07 1986-04-08 1986-10-08 $7700.00 Window Closed / Lapsed

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