US3719998A - Target evaluation - Google Patents

Target evaluation Download PDF

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Publication number
US3719998A
US3719998A US00015079A US3719998DA US3719998A US 3719998 A US3719998 A US 3719998A US 00015079 A US00015079 A US 00015079A US 3719998D A US3719998D A US 3719998DA US 3719998 A US3719998 A US 3719998A
Authority
US
United States
Prior art keywords
target
disc
holding plate
supporting disc
targets
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US00015079A
Other languages
English (en)
Inventor
H Krausser
A Krausser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Carl Edelmann GmbH and Co KG
Original Assignee
Carl Edelmann GmbH and Co KG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE19691910345 external-priority patent/DE1910345C/de
Application filed by Carl Edelmann GmbH and Co KG filed Critical Carl Edelmann GmbH and Co KG
Application granted granted Critical
Publication of US3719998A publication Critical patent/US3719998A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41J—TARGETS; TARGET RANGES; BULLET CATCHERS
    • F41J3/00—Targets for arrows or darts, e.g. for sporting or amusement purposes
    • F41J3/0009—Dartboards
    • F41J3/0095—Manufacture of dartboards
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F41—WEAPONS
    • F41J—TARGETS; TARGET RANGES; BULLET CATCHERS
    • F41J5/00—Target indicating systems; Target-hit or score detecting systems
    • F41J5/14—Apparatus for signalling hits or scores to the shooter, e.g. manually operated, or for communication between target and shooter; Apparatus for recording hits or scores
    • F41J5/16—Manually evaluating scores, e.g. using scoring plugs or gauges; Apparatus for evaluating scores on targets after removal from the target holder

Definitions

  • the sensor of the measuring device in contact with the outer circumference ofthe supporting disc can measure the eccentricity of the supporting disc and thus the corresponding eccentricity of the shot hole.
  • the paper targets which, in order to be accurately centered in the recess of the supporting disc must have a thickness of approximately 2 mm., throw a shadow on the target cards when the light comes from the side so that the shooter no longer sees the target as the circular paper target but as an oval surface which is distracting and irritating.
  • a further drawback of the known device is that due to the different sizes of paper targets used in the different matches, a whole set of supporting discs or centers must be available for each quotient device, since a separate supporting disc of a certain size is required for the evaluation of paper targets of one size. It also happens once in a while that no suitable supporting disc is available for the paper targets of a shooting target.
  • Patented Mar. 13, 1973 It is the object of the present invention to provide a device which permits the use of one-piece targets, independent of their outline and the shape of the bulls-eye forming the actual target while using only a single sup porting disc.
  • the invention is particularly intended to permit the evaluation of hits on a one-piece target with the same accuracy as with the so-called paper targets which, due to the abovementioned drawbacks, are not permitted in national and international shooting championships.
  • the supporting plate is provided with positioning pins and the target is provided with corresponding holes.
  • the supporting disc and the target are provided with three positioning pins and holes, respectively, which are oflset by and disposed at the same distance from the center of the supporting disc and the target disc.
  • the diameter of the preferably cylindrical fitting pins decreases in their upper region and the pins are provided with a tapered tip or are rounded.
  • the holes in the target are disposed at a uniform distance from the center of the bulls-eye in order to assure that the center of the bullseye does indeed coincide with the center of the supporting disc after the target has been placed onto the positioning pins, it is particularly advantageous to manufacture the targets in such a manner that the printing of the target and the cutting of the holes occurs in one process step.
  • the apparatus for producing the targets may be so constructed that punches are disposed in a guide in or next to the printing block for printing the target. These punches are concentrically disposed with respect to the center of the bulls-eye and the printing table is constructed as a die in the area opposite the punches.
  • FIG. 1 is a partial sectional View through the apparatus for evaluating the hits on a target where the individual components are shown in an expanded state for reasons of clarity.
  • FIG. 2 is a plan view of the apparatus of FIG. 1.
  • FIG. 3 is a schematic sectional view of a device for producing the targets constructed according to the present invention.
  • FIG. 4 is an elevational partially sectional view of the apparatus.
  • a holding plate 12 for supporting disc 13 is rotatably mounted in frame 11 of the device.
  • the supporting disc 13 which is annular, and has an open center generally indicated at 13 are three cylindrical centering or positioning pins 14 disposed at the same distance from the center of the supporting disc and olfset by 120 with respect to one another.
  • the positioning pins are each provided with a tapered tip.
  • the target 15 intended for evaluation, after it is removed from any appropriate holder in which it Was disposed during shooting, is provided with holes 16 corresponding to positioning pins 14 and is placed onto supporting disc 13.
  • the annular supporting disc 13 on which the target 15 is mounted is then displaced with respect to the holding plate 12 in such a manner that the centering pin 18 of plug 20, extending through the target 15 and the circular open center in supporting disc 13, comes to lie in the centering bore 22 coaxially disposed in holding plate 12.
  • This holding plate is then rotated 360 in a known manner. Due to the frictional resistance created between the mating surfaces of the supporting disc 13 and the holding plate 12, this disc will rotate with the holding plate.
  • the axis of rotation of the supporting disc 13 and of the target 15 passes exactly through the center of the shot hole 21.
  • the eccentricity of the shot hole 21 with respect to the center of the bulls-eye 17 or the center of the supporting disc 13, which is identical therewith, can be determined without difficulty by means of a suitable, known measuring device 35 mounted on frame 11. When the shot hole is in the exact center of target 15 the eccentricity will be zero.
  • the sensor 23 of this measuring device 35 is in contact with the outer circumference of the supporting disc 13, as shown in FIG. 2.
  • the supporting disc 13 is rotated by 360", and the difference between the maximum and the minimum value shown by indicator 24 of the measuring device is equal to twice the eccentricity of the shot hole 21.
  • the indicator 24 of the measuring device 35 which is preferably provided with a pointer so that it indicates the value when the centers of the annular plate 13 and the holding plate 12 coincide.
  • the maximum deviation from the 0 value measured by the indicator 24 of the measuring device 35 would directly correspond to the eccentricity of the shot hole 21 with respect to the center of bulls-eye 17.
  • guides 26 are disposed next to the printing block 25 for printing the targets.
  • the printing block is mounted to be moved toward and away from the table 30.
  • These guides are set back somewhat with respect to the actual printing plate 27 so that they do not come in contact with the printing roller 28 inking the printing plate.
  • Punches 29 are mounted in guides 26 concentrically disposed with respect to the center of the bullseye. They are coupled in a suitable manner with the mechanism actuating the printing block 25 so that they are pressed downwardly, synchronously with the printing of the target on cardboard 31 placed on the printing table 30.
  • This cardboard passes intermittently below printing plate 27, through the target cardboard and into the bores 32 disposed in printing table 30 so that table 30 is also a die.
  • the bores 32 simultaneously serve to remove the waste material 33 cut out of the target cardboard.
  • the punches 29 also move up and down while the punch guides 26 are stationary.
  • the inking roller 28 moves horizontally back and forth in order to ink the bottom of the printing plate 27.
  • the advantage of the apparatus according to the invention for evaluation of the hits on a target is mainly that one-piece targets can be used which can be manufactured in a single process step and thus very economically or conversely, that it is now possible to evaluate one-piece targets just as accurately as the relatively more expensive paper targets discs.
  • a device for target hit evaluation of the type including a frame, a holding plate means rotatably mounted in said frame, means defining a bore in said holding plate and which is disposed at the axis of rotation thereof, a measuring means having a sensor and mounted in spaced relationship with said holding plate means, a target supporting annular disc means, a target having shot holes therein and mounted on said disc means, a plug means insertable through a shot hole in the target and through said annular disc means into said bore to secure said disc means to said holding plate in frictional engagement therewith and for rotation about the axis of rotation of said holding plate, said disc means, when so mounted on said holding plate, contacting said sensor along the peripheral edge of said disc means, the improvement wherein said target supporting disc means has target positioning pins thereon and said target means are provided with holes corresponding to said pins for properly positioning said target on said target supporting disc means.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Length Measuring Devices With Unspecified Measuring Means (AREA)
  • Manufacture Or Reproduction Of Printing Formes (AREA)
  • A Measuring Device Byusing Mechanical Method (AREA)
US00015079A 1969-02-28 1970-02-27 Target evaluation Expired - Lifetime US3719998A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19691910345 DE1910345C (de) 1969-02-28 Vorrichtung zur genauen Auswertung von Schußtreffern auf einteiligen Schieß scheiben

Publications (1)

Publication Number Publication Date
US3719998A true US3719998A (en) 1973-03-13

Family

ID=5726738

Family Applications (1)

Application Number Title Priority Date Filing Date
US00015079A Expired - Lifetime US3719998A (en) 1969-02-28 1970-02-27 Target evaluation

Country Status (4)

Country Link
US (1) US3719998A (de)
AT (1) AT299757B (de)
CH (1) CH526760A (de)
SE (1) SE357258B (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007003546A1 (de) 2005-07-01 2007-01-11 Siemens Aktiengesellschaft Nutverschluss

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2007003546A1 (de) 2005-07-01 2007-01-11 Siemens Aktiengesellschaft Nutverschluss

Also Published As

Publication number Publication date
DE1910345A1 (de) 1970-09-10
AT299757B (de) 1972-06-26
CH526760A (de) 1972-08-15
DE1910345B2 (de) 1972-06-15
SE357258B (de) 1973-06-18

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