Method and arrangement for positioning of a selected image in a sequence of images at a predetermined location
阅读：666发布：2022-04-10
专利汇可以提供Method and arrangement for positioning of a selected image in a sequence of images at a predetermined location专利检索，专利查询，专利分析的服务。并且Microfilm is transported past a read-out station. Each of the frame of the microfilm has a code markings in a cyclic progressive code. An optical read head furnishes code marking signals corresponding to the code marking of the frame at the microfilm read-out station. A keyboard furnishes an input signal signifying a selected frame. A first comparator compares the input signal to the code marking signal and furnishes a first coincidence signal when the two are equal. The first comparator further furnishes a comparator signal determining the direction of transport of the film in dependence on the sign of the difference between the code marking signal and the input signal. A second comparator compares each code marking signal with the last previously read code marking signal and furnishes a second coincidence signal when a unit step is indicated by said comparison. The film transport is stopped upon simultaneous presence of the first and second coincidence signals.，下面是Method and arrangement for positioning of a selected image in a sequence of images at a predetermined location专利的具体信息内容。
1. Method for positioning a selected one of a sequence of recorded images in a determined location, each of said images having a corresponding recOrded code marking signifying its position in said sequence, comprising, in combination, the steps of furnishing an input signal signifying said position in said sequence of said selected one of said images; storing said input signal, thus furnishing a stored input signal; transporting said sequence of images past said predetermined location; reading out the recorded code marking corresponding to the image at said predetermined location, thereby furnishing a code marking signal; comparing each of said so furnished code marking signals to said stored input signal and furnishing a first coincidence signal when said code marking signal is equal to said stored input signal, and a comparison signal indicative of the sign of the difference therebetween when said code marking signal is unequal to said stored input signal; controlling the direction of transport of said sequence of images past said predetermined location in dependence upon said comparison signal; further comparing each of said code marking signals to the last previously furnished one of said code marking signals and furnishing a second coincidence signal when said so compared code marking signals have a predetermined difference; and stopping the transport of said sequence of images past said predetermined location only upon simultaneous receipt of said first and second coincidence signals.
2. A method as set forth in claim 1, further comprising the steps of furnishing a direction-change signal upon each change in direction of said transporting of said sequence of images past said predetermined location; counting said direction-change signals; and furnishing a failure signal when the number of said direction-change signals exceeds a predetermined number.
3. A method as set forth in claim 1, wherein each of said recorded images further has a recorded register mark; further comprising the steps of furnishing a direction-change signal upon each change of direction of said transport of said sequence of recorded images past said predetermined location; counting said direction-change signals; furnishing an excess direction-change signal when the number of said direction-change signal exceeds a determined number; reading out the recorded code marking of the recorded image at said predetermined location upon occurrence of said excess direction-change signal, thereby furnishing a starting marking signal; comparing said starting marking signal to said stored input signal and furnishing a difference signal corresponding to the difference therebetween; counting said recorded register marks following receipt of said excess direction-change signal; and stopping said transport of said recorded images past said determined location when the number of said so counted recorded register marks is equal to said difference signal.
4. A method as set forth in claim 1, wherein each of said recorded images further has a recorded register mark; further comprising the steps of furnishing a starting marking signal signifying a predetermined one of said recorded images at said determined location; algebraically adding the number of register marks corresponding to the number of recorded images transported past said determined location to said starting marking signal, thereby furnishing a present marking signal; comparing said present marking signal to said code marking signal and furnishing a failure signal upon inequality between said present marking signal and said code marking signal.
5. A method as set forth in claim 1, wherein said code markings are in a cyclic progressive code.
6. Selection arrangement comprising, in combination, elongated signal carrier means having a sequence of images and a corresponding sequence of code markings, one for each of said images, recorded thereon; transport means transporting said elongated signal carrier means along a predetermined path past a predetermined location; read-out means operatively associated with said elongated signal carrier means for reading out the one of said code markings associated with the one of said images at said predetermined location and furnishing a code marking signal corresponding thereto; input means furnishing a stored input signal corresponding to an externally selected one of said images; first comparing means comparing said code marking signal and said stored input signal, for furnishing a comparator signal indicative of the sign of the difference therebetween and a first coincidence signal indicative of equality therebetween; second comparing means comparing said code marking signal to the last previously read out one of said code marking signals and furnishing a second coincidence signal when said so compared signals have a predetermined relationship; direction-changing means connected to said transport means for controlling the direction of movement of said elongated signal carrier means along said predetermined path in dependence upon said comparator signal; and stopping means stopping the transport of said elongated signal carrier means only in response to the simultaneous presence of said first and second coincidence signals, whereby the transport of said elongated signal carrier means is stopped only when said predetermined relationship exists between sequential ones of said code marking signals thereby eliminating incorrect stopping due to defacement or dirt on said code markings.
7. An arrangement as set forth in claim 6, wherein said input means comprise a decimal keyboard for furnishing an input signal signifying the selected one of said images, and first register means storing said input signal thereby furnishing said stored input signal.
8. An arrangement as set forth in claim 6, wherein said read-out means comprise electro-optical read-out means and second register means connected to the output of said electro-optical read-out means for furnishing said code marking signals.
9. An arrangement as set forth in claim 8, wherein said code markings are in a cyclic progressive code, each of said code markings comprising a plurality of bits; and wherein said predetermined relationship is a change in a single one of said bits.
10. An arrangement as set forth in claim 9, further comprising third register means connected to the output of said second register means and having an output connected to said second comparing means for storing said code marking signals upon read-out of the next subsequent one of said code marking signals.
11. An arrangement as set forth in claim 6, wherein said transport means comprise motor means, and a source of voltage connected to said motor means for the energization thereof; and wherein said stopping means comprise an AND gate, having a first and second AND gate input respectively connected to the output of said first and second comparing means, and an AND gate output, and disconnect relay means connected to said AND gate output for disconnecting said source of voltage from said motor means in response to a signal at said AND gate output.
12. An arrangement as set forth in claim 11, wherein said direction-changing means comprise additional relay means having relay contacts interconnecting said source of voltage and said motor means in such a manner that the polarity of voltage applied to said motor means depends upon said comparator signal.
13. An arrangement as set forth in claim 12, wherein said comparator signal comprises a first direction signal indicative of required movement of said elongated signal carrier means in a first direction, and a second direction signal indicative of required movement in a second direction opposite to said first direction; further comprising first counting means counting changes from said first direction signal to said second direction signal and furnishing a first counting signal signifying said so counted changes.
14. An arrangement as set forth in claim 13, further comprising failure signal furnishing means connected to said counting means for furnishing a failure signal when saId counting signal signifies a number of changes exceeding a predetermined number of changes.
15. An arrangement as set forth in claim 13, wherein said elongated signal carrier means further has a plurality of register marks one associated with each of said images; further comprising third comparing means having a first input connected to said input means and a second input connected to said read-out means for comparing said input signal and said code marking signal and furnishing a difference signal corresponding to the difference therebetween at a third comparing output; additional read-out means operatively associated with said elongated signal carrier means for reading said register marks and furnishing register mark signals in response thereto; second counting means having a preset input connected to said comparing output for presetting said second counting means to correspond to said difference signal, said second counting means further having a counting input for counting said register mark signals, said second counting means furnishing a second counting signal when the number of register mark signals received at said counting input corresponds to said difference signal; and means interconnecting the output of said second counting means and said stopping means in such a manner that said transport of said elongated signal carrier means is stopped in response to said second counting signal.
16. An arrangement as set forth in claim 15, wherein said third comparing means has an enable input connected to the output of said first counting means, for enabling said third comparing means only upon receipt of a first counting signal signifying a predetermined number of said changes of direction.
17. An arrangement as set forth in claim 6, wherein said elongated signal carrier means further has a plurality of register marks, one associated with each of said images; further comprising additional read-out means for reading said register marks and furnishing register mark signals in response thereto; third counting means connected to said additional read-out means for counting said register mark signals in a forward or reverse sense depending upon said comparator signal and furnishing a third counting signal signifying the number of so counted register mark signals; fourth comparing means comparing said third counting signal to said code marking signal and furnishing an additional failure alarm signal when said third counting signal is unequal to said code marking signal.
18. An arrangement as set forth in claim 6, wherein said elongated signal carrier means comprise microfilm and said selected image is one frame of said microfilm; and further comprising microfilm-reading means for reading single frames of said microfilm, at said predetermined location.
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