TEACHING DEVICE
First Claim
Patent Images
1. A teaching device for use with a projector having a remote control unit and adapted to project images from a series of film frames, comprising:
- circuit means operably connected to the remote control unit;
a predetermined plurality of select switches associated with each image projected;
advance means operably connected to said circuit means and adapted to actuate the remote control unit and tHereby advance each frame;
means adapted to connect said circuit means to a power source;
said circuit means adapted to prevent operation of said advance means until the correct select switch of said predetermined plurality of select switches for each image has been selected and operated; and
program means physically separate from said film frames and electrically interconnecting said circuit means with said predetermined plurality of select switches to program said circuit means and thereby determine an electrically changeable sequence of correct select switches for the images.
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Abstract
A teaching device for use with a slide or film strip projector which is adapted to project images from a series of slides regulates the advance of the slides. The device includes a housing having a plurality of select switches and an advance switch which actuates the advance of each slide. Circuit means within the housing prevent operation of the advance switch until the correct selection of one of the select switches is made for each slide. Removable program means adapted to be inserted into the housing to program the circuit means for each series of slides.
7 Citations
23 Claims
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1. A teaching device for use with a projector having a remote control unit and adapted to project images from a series of film frames, comprising:
- circuit means operably connected to the remote control unit;
a predetermined plurality of select switches associated with each image projected;
advance means operably connected to said circuit means and adapted to actuate the remote control unit and tHereby advance each frame;
means adapted to connect said circuit means to a power source;
said circuit means adapted to prevent operation of said advance means until the correct select switch of said predetermined plurality of select switches for each image has been selected and operated; and
program means physically separate from said film frames and electrically interconnecting said circuit means with said predetermined plurality of select switches to program said circuit means and thereby determine an electrically changeable sequence of correct select switches for the images.
- circuit means operably connected to the remote control unit;
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2. The device of claim 1, wherein an error counter is provided, said error counter being electrically connected to said circuit means and said circuit means adapted to actuate said error counter when an incorrect select switch is selected and operated for each image.
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3. The device of claim 1, wherein indicator means operably connected to the circuit means are provided to indicate when the correct switch has been selected and operated for each image.
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4. The device of claim 1, wherein said program means is removable whereby different program means can be employed for the same series of film frames.
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5. The device of claim 1, wherein reset means are provided, said reset means being electrically connected to said circuit means and being adapted to reset the program of said circuit means.
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6. A device to regulate the operation of a remote control unit of a slide projector, comprising:
- circuit means operably connected to the remote control unit and adapted to be connected to a power source;
a predetermined plurality of select switches each adapted to close said circuit means;
advance means operably connected to said circuit means and adapted to actuate the remote control unit when said circuit means has been closed; and
program means electrically but not optically interconnecting one of said predetermined plurality of select switches to said circuit means prior to each operation of said advance means whereby the operation of one select switch closes said circuit means and permits actuation of the remote control unit.
- circuit means operably connected to the remote control unit and adapted to be connected to a power source;
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7. The device of claim 6 wherein said circuit means includes recording means, said recording means adapted to record the operation of each select switch except said one select switch prior to each actuation of the remote control unit.
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8. The device of claim 6 wherein indicator means are provided, said indicator means operably connected to said circuit means and adapted to indicate when said one select switch is operated prior to each actuation of the remote control unit.
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9. The device of claim 6, wherein reset means are provided, said reset means operably connected to said circuit means and having a reset switch, said reset means adapted to reset said program means when said reset switch is operated.
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10. A device to regulate the operation of a remote control unit of a slide projector, comprising:
- circuit means operably connected to the remote control unit and adapted to be connected to a power source;
a plurality of select switches each adapted to close said circuit means;
an advance switch operably connected to said circuit means and adapted to actuate the remote control unit when said circuit means has been closed;
program means operably connecting one of said select switches to said circuit means prior to each operation of said advance switch whereby the operation of said one select switch closes said circuit means and permits actuation of the remote control unit;
said circuit means including a step switch, said step switch optically connected with said program means and being adapted to advance after each actuation of said remote control unit whereby the select switch closing said circuit means varies.
- circuit means operably connected to the remote control unit and adapted to be connected to a power source;
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11. The device of claim 10 wherein said program means includes a plurality of primary terminals and a plurality of secondary terminals, each of said secondary terminals connected to one of said primary terminals, each of said primarY terminals connected to one of said select switches, and each advance of said step switch connecting said step switch to one of said secondary terminals.
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12. A device to regulate the operation of a remote control unit of a slide projector, comprising:
- circuit means operably connected to the remote control unit and adapted to be connected to a power source;
a plurality of select switches each adapted to close said circuit means;
an advance switch operably connected to said circuit means and adapted to actuate the remote control unit when said circuit means has been closed; and
program means operably connecting one of said select switches to said circuit means prior to each operation of said advance switch whereby the operation of said one select switch closes said circuit means and permits actuation of the remote control unit, said program means comprising a plug with multiple prongs having internally wired terminals.
- circuit means operably connected to the remote control unit and adapted to be connected to a power source;
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13. The device of claim 12, wherein said program means is removably connected to said circuit means by said prongs.
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14. A device to regulate the operation of a remote control unit of a slide projector, comprising:
- circuit means operably connected to the remote control unit and adapted to be connected to a power source;
a plurality of select switches for closing said circuit means;
said circuit means including a step switch having a moveable contact and a plurality of fixed contacts;
program means to program said circuit means having a plurality of primary terminals and a plurality of secondary terminals;
each said secondary terminal connected to one of said step switch contacts and one of said primary terminals, each said primary terminal connected to one of said select switches;
each said select switch operable to close said circuit means when said select switch is operably connected to said moveable contact through one of said primary terminals, at least one of said secondary terminals and one of said fixed contacts;
an advance switch operably connected to said circuit means for actuating the remote control unit when said circuit means has been closed; and
said moveable contact advancing from one of said fixed contacts to another of said fixed contacts after each actuation of the remote control unit whereby the select switch operable to close said circuit means varies with each actuation of the remote control unit.
- circuit means operably connected to the remote control unit and adapted to be connected to a power source;
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15. The device of claim 14, wherein said circuit means includes reset means having a reset switch, said reset means adapted to advance said moveable contact to a predetermined fixed contact when said reset switch is operated.
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16. The device of claim 14, wherein said circuit means includes error recording means, said error recording means recording only once the operation of each said select switch except said select switch operable to close said circuit means prior to each actuation of the remote control unit.
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17. The device of claim 16, wherein means are provided to mechanically erase said recording means.
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18. The device of claim 14, wherein said circuit means includes indicator means, said indicator means indicating the close of said circuit means whereby said advance switch may be operated to actuate the remote control unit.
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19. The device of claim 14, wherein said program means is removable whereby another program means can be used to change the program of said circuit means.
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20. A teaching device for use with a projector having a remote control unit and adapted to project images from a series of film frames, comprising:
- circuit means operably connected to the remote control unit;
a predetermined plurality of multiple choice switches, one of which is related to each image;
said circuit means adapted to actuate said remote control unit and thereby advance the film frames and project another image upon the actuation of said multiple choice switch related to the image then projected; and
program means physically separate from said film frames and electrically Interconnected with said circuit means and said multiple choice switches determining which said multiply choice switch of said predetermined plurality of multiple choice switches is related to each image and providing a sequence of image related multiple choice switches.
- circuit means operably connected to the remote control unit;
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21. The device of claim 20, wherein said program means is adapted to be changed to provide a different sequence of image related multiple choice switches.
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22. A teaching device for use with a projector having a remote control unit and adapted to project images from a series of slides comprising:
- circuit means operably connected to the remote control unit;
a plurality of multiple choice switches, one of which is related to each image;
said circuit means adapted to actuate said remote control unit and thereby advance a slide and project another image upon the actuation of said multiple choice switch related to the image then projected; and
program means operably connected to said circuit means and said multiple choice switches determining which said multiple choice switch is related to each image and providing a sequence of image related multiple choice switches, said program means comprising a plug with multiple prongs having internally wired terminals.
- circuit means operably connected to the remote control unit;
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23. The device of claim 22, wherein said plug is removeably connected to said circuit means by said prongs.
Specification