Projection system

Claim 2

A projection system for projecting images between first and second focal planes comprising: A. Lens means responsive to an image appearing at a predetermined location in one of said focal planes for projecting said image in the other said focal plane at a predetermined location; B. A plurality of mirrors spaced along and providing an optical path between said images comprising: 1. a first mirror positioned to receive images from and transmit images to one of said focal planes; 2. a second mirror positioned to receive images from and transmit images to the other of said focaL planes; and 3. third and fourth mirrors, said third mirror being positioned to transmit images between said fourth mirror and said first mirror and said fourth mirror being positioned to transmit and receive images between said third mirror and said second mirror; and C. Image size adjustment means comprising positioning means attached to at least one of said mirrors for varying the path length between the images whereby the relative size of said images is varied without varying the said locations.

Claim 3

a second mirror positioned to receive images from and transmit images to the other of said focaL planes; and

Claim 4

a second mirror positioned to receive images from and transmit images to the other of said focaL planes; and

Claim 5

A projection system comprising: A. A first rectangular aperture having a length substantially longer than its width; B. A first reeling system for moving a first elongated sheet of image material across and adjacent to said aperture wherein the width dimension of said material is oriented to be exposed to the length dimension of said aperture; C. A second rectangular aperture having a length substantially longer than its width and being smaller in both dimensions than said first aperture; D. A second reeling system for moving a second elongated sheet of image material across and adjacent to said second aperture wherein the width dimension of said second elongated sheet of image material is oriented to be exposed to the length dimension of said second aperture; E. Projection means for projecting an image appearing in a focal plane of one of said sheets of material at a said aperture on to the focal plane of the other of said sheets of image material at the other said aperture; F. Image size adjustment means comprising means for continuously varying the optical path length between a said image and its projected image; G. First electrical drive means for driving said first reeling system to cause said image material to traverse said first aperture at a selected speed; H. Second electrical drive means for driving said second reeling system to cause said image material to traverse said second aperture at a selected but continuously variable speed; I. First speed control means for regulating the speed of said first electrical drive means; and J. Second speed control means responsive to the speed of said first electrical drive means and the ratio of the size of a said image in one said focal plane and its projection in the other said focal plane for regulating the speed of the said second electrical drive means.

Claim 6

A projection system comprising: A. A first rectangular aperture having a length substantially longer than its width; B. A first reeling system for moving a first elongated sheet of image material across and adjacent to said aperture wherein the width dimension of said material is oriented to be exposed to the length dimension of said aperture; C. A second rectangular aperture having a length substantially longer than its width and being smaller in both dimensions than said first aperture; D. A second reeling system for moving a second elongated sheet of image material across and adjacent to said second aperture wherein the width dimension of said second elongated sheet of image material is oriented to be exposed to the length dimension of said second aperture; E. Projection means for projecting an image appearing in a focal plane of one of said sheets of material at a said aperture on to the focal plane of the other of said sheets of image material at the other said aperture; F. Image size adjustment means comprising means for continuously varying the optical path length between a said image and its projected image; G. First electrical drive means for driving said first reeling system to cause said image material to traverse said first aperture at a selected speed; H. Second electrical drive means for driving said second reeling system to cause said image material to traverse said second aperture at a selected but continuously variable speed; I. First speed control means for regulating the speed of said first electrical drive means; and J. Second speed control means responsive to the speed of said first electrical drive means and the ratio of the size of a said image in one said focal plane and its projection in the other said focal plane for regulating the speed of the said second electrical drive means.

Claim 7

A projection system as set forth in claim 2 wherein: A. Said second electrical drive means comprises an electrical motor coupled to drive said second reeling system; B. Speed-sensing means responsive to the speed of said first electrical drive means for providing an electrical signal proportional to the speed of said first electrical drive means; C. Said second speed control means comprising means responsive to output of said speed-sensing means for applying as on input to said second electrical drive means the fraction of the output of said speed-sensing means corresponding to the said ratio of the sizes of said images.

Claim 8

third and fourth mirrors, said third mirror being positioned to transmit images between said fourth mirror and said first mirror and said fourth mirror being positioned to transmit and receive images between said third mirror and said second mirror; and C. Image size adjustment means comprising positioning means attached to at least one of said mirrors for varying the path length between the images whereby the relative size of said images is varied without varying the said locations.

Claim 9

third and fourth mirrors, said third mirror being positioned to transmit images between said fourth mirror and said first mirror and said fourth mirror being positioned to transmit and receive images between said third mirror and said second mirror; and C. Image size adjustment means comprising positioning means attached to at least one of said mirrors for varying the path length between the images whereby the relative size of said images is varied without varying the said locations.

Claim 10

A projection system as set forth in claim 2 wherein said image size adjustment means comprises: A. A plurality of mirrors spaced along and providing an optical path between the images appearing in the said focal planes; and B. Said image size adjustment means comprises positioning means attached to at least one of said mirrors for varying the path length between the images whereby the relative size of said image is varied without varying the location of either a said image in one said focal plane or its projected image in the other said focal plane.

Claim 11

The projection system set forth in claim 4 wherein said plurality of mirrors comprises: A. A first mirror positioned to receive images from and transmit images to one of said focal planes; B. A second mirror positioned to receive images from and transmit images to the other of said focal planes; and C. Third and fourth mirrors, said third mirroR being positioned to transmit images between said fourth mirror and said first mirror and said fourth mirror being positioned to transmit and receive images between said third mirror and said second mirror.

Claim 12

A projection system as set forth in claim 5 wherein said image size adjustment means comprises means for selectively varying the distance of said third and fourth mirrors from said first and second mirrors.

Claim 13

A projection system as set forth in claim 6 wherein the optical path between said first and third mirrors and optical path between said second and fourth mirrors are parallel and wherein said image size adjustment means comprises means for moving said third and fourth mirrors in unison along a linear path.

Claim 14

A projection system as set forth in claim 2 wherein said image size adjustment means comprises: A. A first mirror positioned to receive images from and transmit images to one of said focal planes; B. A second mirror positioned to receive images from and transmit images to the other of said focal planes; C. Third and fourth mirrors, said third mirror being positioned to transmit images between said fourth mirror and said first mirror and said fourth mirror being positioned to transmit and receive images between said third mirror and said second mirror. D. Adjustment means for selectively varying the distance of said third and fourth mirrors from said first and second mirrors. E. Ratio signal means responsive to the position of third and fourth mirrors for providing and electrical output proportional to the ratio of magnification between said images. F. Summing means for electrically adding the output of said ratio signal means and an electrical signal proportional to the ratio of speed of said first and second drive means and applying the sum signal to said second drive means; G. First speed-sensing means responsive to the speed of said second drive means for developing an electrical output proportional to the reciprocal of said speed of said second drive means; H. Second speed-sensing means responsive to the speed of said first drive means for developing an electrical output proportional to the speed of said first drive means; and I. Electrical multiplication means responsive to the outputs of said first and second speed-sensing means for providing to said summing amplifier said electrical signal proportional to the said ratio of speeds of said first and second drive means.

Claim 15

A projection system as set forth in claim 8 wherein said image size adjustment means comprises: A. Mounting means for movably supporting said third and fourth mirrors; and B. Mirror drive means including a reversible motor and a clockwise-counterclockwise switch for providing power to said reversible motor, said motor being coupled to said mirror mounting means for selectively moving said third and fourth mirrors along said linear path to increase or decrease the distance of said third and fourth mirrors with respect to said first and second mirrors.

Claim 16

A projection system as set forth in claim 9 wherein said mirror drive means further comprises a selective stop circuit in circuit between said clockwise-counterclockwise switch and said reversible motor comprising: A. A plurality of normally closed selector switches connected in series; B. A plurality of normally closed position-sensing switches being positioned to be operated ''''off'''' by said mirror-mounting means contacting a said position-sensing switch, said position-sensing switches being spaced along the travel of said mirror-mounting means; and C. Each said selector switch being connected in parallel with a single said position-sensing switch whereby when said clockwise-counterclockwise switch is operated to an ''''on'''' condition said mirror-mounting means will be moved along its path of travel until the position responsive switch in parallel with an operated ''''off'''' said selector switch Is also operated ''''off'''', stopping the travel of said mirror-mounting means.

Claim 17

A projection system as set forth in claim 10 further comprising means for selectively positioning said position-sensing switches whereby said third and fourth mirrors may be stopped at any of a plurality of preselected points along the travel of said mirror mounting means.

Claim 18

A projection system as set forth in claim 11 wherein said ratio signal means comprises a potentiometer wherein the wiper arm of the potentiometer is coupled for travel with said mirror-mounting means.

Claim 19

A projection system as set forth in claim 12 further comprising means responsive to movement of said mirror-mounting means for varying the focus of said lens means for maintaining the focus of said images.

Claim 20

In combination: A. A first reeling system for moving a first elongated sheet of material; B. A second reeling system for moving a second elongated sheet of material; C. First electrical drive means for driving said first reeling system at a selected speed; D. Second electrical drive means for driving said second reeling system at a selected but continuously variable speed which is a desired fraction of the speed of said first electrical drive means comprising a motor coupled to drive said second reeling system; E. Speed-sensing means responsive to the speed of said first electrically drive means for providing an electrical signal proportional to the speed of said first electrical drive means; and F. Speed control means comprising means responsive to the output of said speed-sensing means for applying as on input to said motor the fraction of the output of said speed-sensing means corresponding to the desired ratio of speed synchronism between said first and second electrical reeling systems.

Claim 21

In combination: A. A first reeling system for moving a first elongated sheet of material; B. A second reeling system for moving a second elongated sheet of material; C. First electrical drive means for driving said first reeling system at a selected speed; D. Second electrical drive means for driving said second reeling system at a selected but continuously variable speed which is a desired fraction of the speed of said first electrical drive means comprising a motor coupled to drive said second reeling system; E. Speed-sensing means responsive to the speed of said first electrically drive means for providing an electrical signal proportional to the speed of said first electrical drive means; and F. Speed control means comprising means responsive to the output of said speed-sensing means for applying as on input to said motor the fraction of the output of said speed-sensing means corresponding to the desired ratio of speed synchronism between said first and second electrical reeling systems.

Claim 22

In combination: A. First and second electrical drive means adapted to provide movements at different speeds, B. Ratio signal means for providing an electrical output proportional to the desired ratio of speeds between first and second electrically driven movements; C. Summing means for electrically adding the output of said ratio signal means and an electrical signal proportional to the ratio of the actual speeds of said first and second drive means and applying the sum signal to said second electrical drive means; D. First speed-sensing means responsive to the speed of said second electrical drive means for developing an electrical output proportional to the reciprocal of said speed of said second electrical drive means; E. Second speed-sensing means responsive to the speed of said first electrical drive means for developing an electrical output proportional to the speed of said first electrical drive means; and F. Electrical multiplication means responsive to the outputs of said first and second speed-sensing means for providing to said summing means said electrical signal proportional to the said ratio of speeds of said first and second electrical drive means.

Claim 23

In combination: A. First and second electrical drive means adapted to provide movements at different speeds, B. Ratio signal means for providing an electrical output proportional to the desired ratio of speeds between first and second electrically driven movements; C. Summing means for electrically adding the output of said ratio signal means and an electrical signal proportional to the ratio of the actual speeds of said first and second drive means and applying the sum signal to said second electrical drive means; D. First speed-sensing means responsive to the speed of said second electrical drive means for developing an electrical output proportional to the reciprocal of said speed of said second electrical drive means; E. Second speed-sensing means responsive to the speed of said first electrical drive means for developing an electrical output proportional to the speed of said first electrical drive means; and F. Electrical multiplication means responsive to the outputs of said first and second speed-sensing means for providing to said summing means said electrical signal proportional to the said ratio of speeds of said first and second electrical drive means.