SU102767A1 - Dynamograph - Google Patents

Description

The subject of the invention is a dynamograph for recording the tension of a thread when it is unwound from a cocoon, consisting of a drum companion with a spring motor and a reel with an electric motor.

. The proposed dynamometer, but compared with the known dynamometers for this purpose, has a higher sensitivity in the initial and final portions of the moving yi-test under investigation.

The special feature of the dynamograph is that it has an angular lever newly mounted on an axis, on one end of which the contact of an electric motor starter is fixed, and on the other - a spring engine axle block.

The drawing shows a general view of the dynamograph.

For example, a smoked paper 2 is fixed on the drum / recorder, on which the search tip 3 draws a graph 4 of the magnitude of the force generated by unwinding the alkaline thread 5 from the cocoon 6 floating in the water in the bath 7. to the top supported by center 9, fixed

on the arm 10, mounted on the rack //.

The axis 8 is provided with a friction disk 12 interacting with the wheel 13, which is driven by a spring motor 14 having a clockwork key 15. The rotation speed of the spring motor 14 is regulated, for example, by a clock mechanism or a rotating wind positioned therein.

The tip 3 is mounted on a flat spring 16 mounted on the bracket 17, mounted on a rack 8, and provided with a roller 19, through which a loop of unwinding silk thread 5 is thrown.

To mark on the paper 2 the straight line 20 the initial position of the writing tip 5, in order to make it easier to determine, on the drawn chart, the magnitude of the forces required to soften the snapping yarn from the cocoon .6, the wheel 22 drawing on paper straight line.

To register the tension of the thread 5 along the entire length of its unwinding from the cocoon in the dynamograph, the reel 23 is used, lying;

synchronously with the rotation of the recorder drum.

The reel is mounted on soy 24, which freely rotates in the bearing of the bracket 25 mounted on rack 26. At the other end of the axis 24 a drive pulley 27 is attached, connected by a belt 28 with a pulley

29. electric motor 30.

The length of the unwinding thread is taken into account by the counter 31, the pulley 32 of which by the belt 33 is connected to the driving pulley 27.

In order to match the rotational speed of the reel 23 with the rotational speed of the drum / rheostat 34 is included in the power circuit of the electric motor 30.

To ensure that the engine 14 is turned on and off at the same time, the motor

30, reel 23 and counter 31 are applied rotary lever mounted on the axis} 35.

At one end of this lever is fixed contact 36, which interacts with a fixed contact 37. Contacts 36 and 37 are introduced into the electrical circuit of the electric motor 30.

At the other end of the lever 35 is installed brake pad for the axis of the spring motor M.

A cocoon 6 is placed in the bath 7, the thread 5 of which is placed on the roller 19 of the writing tip 3 and then attached to the reel 23.

Turning the angular lever 35 clockwise releases the axis of the spring motor 14 from the brake shoe and simultaneously turns on the electric motor 30,

the result is a rotation of the reel 23 and the counter 31.

Depending on the efforts of its loop arising from unwinding of the thread 5, overcoming the tension of the spring 16, the roller 19 with the writing tip 3, drawing the schedule 4 of the tension of the thread tension, declines downwards by an appropriate amount.

At the same time, the wheel 21 draws on paper 2 a line 20 of the initial polol of the writing tip, which facilitates the reading of the magnitude of the efforts in the initial and final sections of the moving thread under study.

A graph obtained on smoked paper is fixed by plastering onto it, for example, with a spray gun, fixing an alcohol solution of shellac.

Subject invention

A dynamograph for recording the tension of silk iiti when it is unwound from a cocoon, containing a recorder with a spring motor and a reel with an electric motor, is necessary in order to increase its sensitivity in the initial and final portions of the studied a moving thread, in it is applied a corner lever mounted on an axis, at one end of which the contact of an electric motor starter is fixed, and on the other end a brake spring of an axle motor.