Ordnance – Mounts – Training mechanisms
Patent
1987-04-06
1989-04-25
Brown, David H.
Ordnance
Mounts
Training mechanisms
33238, 235411, F41G 306, F41G 508
Patent
active
048236748
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a sight for aiming at a mobile target of an anti-aircraft gun or the like which is manually aimed in elevation and azimuth, comprising a ranging unit, an aiming unit fixed to the gun and a calculating unit, preferably a computer, the ranging unit comprising first means for optical aiming at the target along a first aiming line, preferably fieldglasses, a device for ranging to the target, preferably of the laser type, devices for measuring the angular rates of the aiming line in elevation and azimuth, preferably gyros, the sight also comprising a device for measuring the elevation, which at least contributes to the measurement of the elevation of the ranging unit, preferably an electrically sensed pendulum, said mentioned devices being provided to emit signals corresponding to their respective measured values to the calculating unit, the aiming unit comprising second means for optical aiming at the target, which means is controllable in elevation and azimuth in relationship to the firing direction of the anti-aircraft gun the calculating unit being provided, quided by said received signals, and information given about the velocity of the projectile fired from the anti-aircraft gun and the prevailing wind vector, to control the second optical means so that when aiming through same at the target, the lead angle and the offset angle of the barrel of the anti-aircraft gun are such, that a fired projectile will hit the target.
When fighting against mobile targets with an anti-aircraft gun there are different methods for aiming. The most simple one, but also the least reliable, implies so called direct aiming, in which the aiming operator judges, by experience, the lead angle and the offset angle by tracking the target through a simple ring sight. The aiming is entirely manual. In order to improve such manual aiming of an anti-aircraft gun its barrel has been provided with gyros measuirng its angular rates, emitting signals corresponding to the angular rates of the barrel in elevation and azimuth to a calculating unit, which in turn emits control signals to an optical sight, the aiming line of which is controllable in relationship to the direction of the barrel of the anti-aircraft gun. The control signals have the object to control the sight in relationship to the firing direction, so that the aiming operator, by aiming at the target and simultaneously setting the firing direction in elevation and azimuth, shall bring about such lead and offset angles that a fired projectile will hit the target. As the gyros measuring the angular rates are fixed to the gun, the measurement is disturbed by their movement together with the setting of the barrel, so that the method implies a dependent aiming line method.
The development of systems for fire-control of anti-aircraft guns comprises remote control of barrels from a central ranging unit from which the range to the target is determined and its velocity and track in an earthbound coordinate system and with the aid of a calculating unit the anti-aircraft gun is remotely controlled by servo means, so that the lead- and offset angles for the barrel are the correct ones for firing the projectile. the range determination in such a central ranging unit is carried out by radar or by a laser meter provided with a thoroughly gyro stabilized sight. Such equipment is expensive and complicated. The manual aiming of the barrel is completely eliminated in these fire-control systems, which apply an independent aiming line method.
As there are still several manually aimed anti-aircraft guns, which are not suited to rebuild for remote control, there is a demand for a sight for the application of an independent aiming line method for manually aimed anti-aircraft guns. This sight should be simple and reliable and should permit a high degree of hit precision. The object of the invention is thus to provide a sight of the art mentioned introductorily, which bears said desired features. Further, the sight shall be so stable when aiming without gyro-stabilizing,
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patent: 3845276 (1974-10-01), Kendy et al.
patent: 3848509 (1974-11-01), Corn
patent: 3992708 (1976-11-01), Olson et al.
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patent: 4011789 (1977-03-01), Bresee et al.
patent: 4146780 (1979-03-01), Sprey
patent: 4266463 (1981-05-01), Saltin
patent: 4402250 (1983-09-01), Baasch
Brown David H.
Custin James R.
Nilles James E.
Saab Instruments Aktiebolag
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