Patent US5519256A successfully refreshed from Google Patents.
US3758052A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for accurately increasing the range of gun projectiles
Assignee: United States Department of the Navy
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Filing: 1969-07-09
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Granted: 1973-09-11
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Expires: 1989-07-09
Abstract
Abstract The present invention is a gun system which utilizes rocket assisted projectiles and accurately controls their placement. The projectile is fired by a gun and actual trajectory variables are compared in a computer with desired trajectory conditions. If there is a difference, the firing time of the rocket is altered to make the actual trajectory variable correspond to the desired condition. A radar system is utilized by the computer to obtain the trajectory information. A transmitter is connected to the computer to send the firing signal to a receiver mounted in the projectile.
Inventors
- 👤 Alexander R Mc
- 👤 L Stout
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 06:27
CPC Classifications
F; F42; F42B; F42B15/00; F42C; F42C13/00; F42C13/04; F42C13/047
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
175 words
A system for controlling the placement of a gun-launched projectile comprising: a projectile adapted to be launched from a gun; booster rocket means incorporated in said projectile for imparting additional thrust along the longitudinal axis of the projectile subsequent to the launching of said projectile from said gun; means located remote from said projectile for measuring actual projectile trajectory parameters; a computer located remote from said projectile responsive to said measuring means which utilizes the measured trajectory parameters to provide an indication of when said measured trajectory parameters differ from the Desired projectile trajectory parameters and which generates an initiate signal when the measured variables and the desired conditions differ; a transmitter connected to said computer and operable to send said initiate signal to said projectile; said projectile further comprising a radio receiver to receive the initiate signal from said transmitter; Wherein the rear section of said projectile forms a booster rocket which is actuated by said initiate signal received by said radio receiver to provide additional thrust to said projectile along its longitudinal axis.
Claim 2
Independent Claim
175 words
A system for controlling the placement of a gun-launched projectile comprising: a projectile adapted to be launched from a gun; booster rocket means incorporated in said projectile for imparting additional thrust along the longitudinal axis of the projectile subsequent to the launching of said projectile from said gun; means located remote from said projectile for measuring actual projectile trajectory parameters; a computer located remote from said projectile responsive to said measuring means which utilizes the measured trajectory parameters to provide an indication of when said measured trajectory parameters differ from the Desired projectile trajectory parameters and which generates an initiate signal when the measured variables and the desired conditions differ; a transmitter connected to said computer and operable to send said initiate signal to said projectile; said projectile further comprising a radio receiver to receive the initiate signal from said transmitter; Wherein the rear section of said projectile forms a booster rocket which is actuated by said initiate signal received by said radio receiver to provide additional thrust to said projectile along its longitudinal axis.
Claim 3
Dependent Claim
20 words
A system as in claim 1 further comprising a squib connected to said radio receiver for firing said rocket booster.
Claim 4
Dependent Claim
36 words
A system in claim 2 wherein said rocket booster includes: a nozzle through which ignited rocket fuel is directed; and solid rocket fuel for powering said rocket booster; said radio receiver being mounted in said nozzle.
Claim 5
Dependent Claim
28 words
A system as in claim 3 further comprising an eccentric plug mounted in said nozzle to protect said radio receiver and to prevent premature ignition of said rocket.
Claim 6
Dependent Claim
51 words
A system as in claim 4 further comprising a centrifugal switch connected to said squib; and a power supply connected to said centrifugal switch for providing energy to ignite said squib; said centrifugal switch being operative to prevent power from reaching said squib until sufficient spin is imparted to said projectile.
Claim 7
Dependent Claim
45 words
A system as in claim 5 further comprising: a discriminator connected to radio receiver to protect the system from erroneous ignition signals; and a level detector connected to said discriminator and said squib to further insure that the squib is ignited at the proper time.
Claim 8
Dependent Claim
26 words
A system as in claim 6 further comprising a delay circuit connected between said centrifugal switch and said squib to prevent premature ignition of said squib.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |