SU1581607A1 - Arrangement for obtaining experimental traces of criminal tools - Google Patents

Abstract

The invention relates to devices for obtaining experimental traces of crime instruments and improves the performance and quality of experimental traces of crime instruments by the fact that it has racks 5 located on the base 1 with 7 supply coils and receiving coils with longitudinal slots 8, the tension roller 9 and the spring loaded pressure roller 10, the ratchet wheel 11, the drum 12 with radially located projections 13, the spring loaded dog 14 with the opposite lugs 15, a brake, the holder 2 being made in the form of a spring-loaded U-shaped frame installed rotatably and cantilever-mounted with free ends on the inner surface of the ratchet wheel 11, and the crossbar on the rack 5 of the pressure roller 10 and fixed with the possibility of axial movement of retainers 17, the pressure roller 10 is mounted eccentrically to the ratchet wheel 11 under the holder 2 and with the possibility of vertical movement, the drum 12 is mounted on the axis 18 of the supply reel and coaxially to the ratchet wheel 11, The din of the protrusions 15 of the pawl 14 is located with the possibility of contact with the teeth 19 of the ratchet wheel 11, and the other with the protrusions 13 of the reel 12, the brake is installed with the possibility of interaction with the ratchet wheel 11, while the copier 4 is made of a transparent polymer film, for example celluloid installed with the possibility of bending around the pressure roller 10 and the tension roller 9, and its free ends are secured in the slot x 8 of the supply and reception 7 coils. 3 il.

Description

Phage. 2

J 1

moving the latches 17, the presser roller 10 is mounted eccentrically to the ratchet wheel 11 under the holder 2 and with the possibility of vertical movement, the drum 12 is mounted on the feed coil axis 18 and coaxially to the ratchet wheel 11, one of the projections 15 of the pawl 14 is in contact with the ratchet teeth 19 wheels 11, and the other - with vyst818174

13, the brake is installed with the ability to interact with the ratchet wheel 11, while the barely copier material k is made of a transparent polymer film, such as celluloid, installed with the possibility of bending the pressure roller 10 and the tension roller 9, and

IQ free ends secured in the slot x 8 supply and receive 7 coils. 3 il.

The invention relates to devices for obtaining experimental traces of crime instruments.

The purpose of the invention is to increase the productivity and quality of experimental traces of crime instruments.

Figure 1 shows a device for obtaining experimental traces of crime instruments, top view; figure 2 - section aa in figure 1; on fig.Z - section bb in figure 1.

The device for obtaining experimental traces of crime instruments contains

1, under the holder 2 of the gun 3, the crime tracking material 4, has racks 5 arranged on the base 1 with drive feed 6 and receiving 7 bobbins placed on them with longitudinal slits 8, tension roller 9 and spring-loaded pressure roller 10, ratchet wheel 11 , a drum 12 with radially located protrusions 13, a spring-loaded dog 14 with oppositely directed protrusions

15, brake 16. Moreover, the holder

2 made in the form of a spring-loaded U-shaped frame installed with the possibility of rotation and cantilever fixed with free ends on the inner surface of the ratchet wheel

11, and the crossbar on the stand 5 of the pressure roller 10 and the latches 17 installed with the possibility of axial movement. The pressure roller 10 is mounted eccentrically to the ratchet wheel 11 under the holder 2 and with the possibility of vertical movement. The drum 12 is installed on the axis 18 of the feeding reel 6 and coaxially with the ratchet wheel 11. One of the projections 15 of the dog 14 is disposed with the possibility of

50

five

0

five

19 ratchet wheel teeth

11, the other - with the protrusions of the drum 13

12, The brake 16 is mounted with the possibility of interaction with the ratchet wheel 11. At the same time, the copying material 4 is made of a transparent polymer film, such as a celluloid, installed with the possibility of bending around the pressure roller 10 and the tension roller 9 and its free ends are fixed in the slot 8 of the feed 6

and reception 7 coils.

The vertical supports 5 are fixed one opposite the other parallel to the axis of the base 1. On the supports 5 are sequentially mounted for rotation around their axes parallel to each other and perpendicular to the axis of the base 1, a feed 6 and a receiving 7 coil, a tension roller 9 and a pressure roller 10 installed with rotatable eccentrically to the pressure roller 10, ratchet wheel

11c with sector-shaped depressions 20 formed along its perimeter, separated by teeth 19, drum 12 with protrusions

13, mounted on axis 18, feed coil 6 coaxially with drum 12, spring loaded dog 14 with opposing projections 15, connecting drum 12 with ratchet wheel 11, interacting with its projections 15 with projections 13 of drum

12 and the valleys 20 of the ratchet wheel 11. The brake 16 is placed on the base and interacts with the ratchet wheel 11, the Drive 21 is installed on the base 1 and through the gearbox 22 is connected to the receiving coil 7.

The tension roller 9 is placed between the receiving coil 7 and the pressure roller 10 eccentrically about their axes. The pressure roller IO is located between

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The tension roller 9 and the feed coil 6 are spring-loaded and installed with the possibility of simultaneous rotation around its axis and reciprocating movement in the vertical direction relative to the holder 2. The clamps 17 are made in the form of clamping screws with inserts 23 installed with the possibility of axial movement opposite each other friend in racks 5 frame holder 5.

A device for obtaining experimental traces of crime instruments operates as follows.

The coping material is a transparent celluloid film 4, is charged into the device, is transferred through the pressure roller 10 and is passed under the tension roller 9. The ends of the transparent film 4 are fixed in the slots 8 of the coils 6 and 7, followed by a total tension film 4 and its fixation .

A tool 3 of the crime is mounted in the holder 2, which is centered and clamped by screws 17 between the inserts 23. In this case, the pressure of the working part of the tool 3 is adjusted to the film 4.

The actuator 21 is turned on, which, through the reducer 22, drives the receiving coil 7 into rotation. As a result, the film 4 is wound onto the coil 7, coiling from the coil 6. With the passage of the film 4 under the working part of the gun 3 mounted in the holder. 2, traces of individual defects of the gun 3 are formed on it. Millimeter divisions are applied along the entire film 4 to establish the front and counter corners of the gun

3 relative to the film 4.

During the movement of the film 4, the feed coil 6 rotates along with the drum 12, which, in turn, by the projections 13 acts on the protrusions of the dog 14. The last projection 15 acts on the valleys 20 of the ratchet wheel 11, which, under the action of the external spring and its mass, with the mass of the gun 3 rotates one tooth 19 in the direction of movement of the film 4, thereby changing the angle of inclination of the gun 3 relative to the film 4 to obtain an experimental trace from it below the following

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81607 -6

angle of This achieves the formation on the film of 4 tracks from the gun 3 at different frontal and counter angles with respect to the film 4 and to imitate the corresponding angles from the gun 3 at the crime scene.

After receiving the experimental traces from one side of the tool 3, the JQ later turns (rearranged) in the holder 2 and the process of obtaining the tracks repeats for the second side of the tool 3.

Then a section of film 4 with e, xperia J5 is cut off from the total roll of film 4 placed on reel 6 by mental traces and goes to an expert for research, which experimentally compares the obtained traces with

20 traces found at the crime scene.

Claims (1)

Apparatus of the invention for obtaining experimental traces of crime instruments, comprising sledokopirovanny material located on the base under the holder of crime instruments, characterized in that, in order to increase the productivity and quality of experimental traces of crime instruments, it has located on the basis of a rack with feed and drive gears placed on them. receiving coils with 35 longitudinal slits, a tension roller and a spring loaded pressure roller, a ratchet wheel, a drum with radially protrusions, a spring-loaded dog with a counter-projection falsely directed protrusions, a brake, the holder made in the form of a spring-loaded U-shaped frame installed with the possibility of rotation and cantilever free 45 ends on the inner surface of the ratchet wheel, and the crossbar on the stand of the pressure roller and the clamps installed with the possibility of axial movement; 50, the roller is mounted eccentrically to the ratchet wheel under the holder and with the possibility of vertical movement, the drum is mounted on the axis of the feeding reel and coaxially to the ratchet wheel, 55 one of the tabs of the pawl is located with the possibility of contact with the teeth of the ratchet wheel, the other with the tabs of the drum, the brake is installed with the possibility of interaction with the ratchet thirty Editor I. Casard Fig.Z Compiled by Yu.Zezera Tehred M. Khodanich Proofreader T. Malets Order 2060 Circulation 322 VNIIPI State Committee for Inventions and Discoveries at the State Committee on Science and Technology of the USSR 113035, Moscow, Zh-35, Raushsk nab. 4/5 Production and Publishing Combine Patent, Uzhgorod, st. Gagarin, 101 Subscription