SU47093A1 - Automatic gearbox - Google Patents

Description

In the proposed automatic gearbox, the negative lens is displaced by a lever, the axis of rotation of which maintains the horizontal direction while the optical axis of the pipe gets tilted, resulting in an angle between the axis of the pipe and the longitudinal axis of the lever decreasing in proportion to the cosine of the angle of inclination.

The drawing shows the scheme of the proposed automatic gearbox.

The proposed optical automatic gearbox, which is a variable-base rangefinder at the target, is a slant (it is for reading on a horizontal bar of a horizontal range with an inclined beam of sight.

The instrument is essentially a double image tachometer. The image shift and the parallax angle are made by moving the diffusing lens in front of the telescope objective. The indicated movement of the lens is carried out by the lever L, the axis of rotation of which makes a constant angle with the axis of rotation of the tube of the rangefinder. The magnitude of the parallax angle caused by this shift of the negative lens in the direction perpendicular to the optical axis is determined by the shape

mule a j

where o denotes lens shift the piecewise length of the same lens.

(201)

The initial direction of the optical axis of the pipe can be maintained by a paired pipe (as in the inventions of Prof. Hugershofa and VN Churilovsky), but for structural considerations, according to the invention, it is proposed to separate the two halves of the diverging lens so that one half is located in front of the bottom of the lens Oh, and the second was shifted by the value of S in front of the upper half of the same lens Ob.

In order that with an inclined ray of sight along a horizontally set rail, it was possible to count the horizontal range directly, it is sufficient that the angle “follows the law

w cos in

(2)

where o is the parallax angle with a horizontal pipe; willows are the elevation or descent angle on the ground. The change of the angle according to the law (2) is carried out as follows. A vertical finger on the rim of the negative lens enters the slot of lever A, which rotates around the ZZ axis.

The ZZ axis lies in the horizontal plane and intersects the horizontal axis NOR of the telescope near the optical axis.

Denote the angle in the horizontal plane between the axes ZZ and / f // through

"And the length of the lever L letter /. Then lens shift

 sin a (3)

since in the horizontal position of the optical axis of the pipe, said axis makes an angle with the direction of the lever A. When the pipe is tilted, the angle between the axis of the pipe and the lever will vary according to the law.

"A cos Oi (4)

which can be proved by the positions of spherical trigonometry.

Substitute the value of a into formula (3), first putting sin in mind j of the smallness of its angle.

Then we have. cos in (5) Substituting in formula (1) gives:

W -. cos in (6)

This proves that the angle follows the law (2).

The subject matter of the invention.

An automatic gearbox for determining a horizontal range on a horizontal rail, characterized in that the shift of the rangefinder lens with the base at the target is carried out by lever A, the axis of rotation of which makes a constant angle with the axis of rotation of the pipe of the rangefinder and is placed in slots remaining in the horizontal plane when tilted pipe rangefinder so that the angle between the axis of the pipe and the projection of the longitudinal axis of the lever A on the horizontal plane is proportional to the cosine of the angle of inclination of the pipe, which provides a change p ssto audio observed between the two pixels E, also proportional to the cosine of this angle, and hence a direct reading of the horizontal distance.