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 Posted: Mon Oct 05, 2009 10:53 pm |
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The original Technicolor 3-strip Camera 2072091
The original Technicolor 3-strip Optical System 2000058
The Dichroic Prism used in Technicolor camera from 1951-1955 2749792
Regards Peter M |
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| Peter... |
| Posted: Tue Oct 06, 2009 11:08 am |
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On 2009-10-06 01:53:27 -0700, cinemad at (no spam) hotmail.com said:
Quote: The original Technicolor 3-strip Camera 2072091
The original patent, drawn earlier, shows Mitchell Standard movements.
The actual cameras, as constructed, have Mitchell Compensating Link
movements (NC, BNC, FC, BFC type).
There are two movements, one being conventional, and the other being a
reverse of the other.
The movements are driven not by a horizontal shaft, as would be
conventional for such a movement, but by a vertical shaft which has a
single worm which engages the two worm gears on the movements, these
movements being 90 degrees displaced in the horizontal plane, and
surrounding the beam-splitter.
It is this vertical drive shaft of the Three-Strip camera which made
the later adaptation to VistaVision (1955) somewhat straightforward.
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CinemaScopeŽ: The Modern Miracle You See without Special Glasses! |
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| Peter... |
| Posted: Sun Oct 18, 2009 12:05 am |
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On 2009-10-06 01:53:27 -0700, cinemad at (no spam) hotmail.com said:
Quote: The original Technicolor 3-strip Optical System 2000058
There was an earlier concept, disclosed as the second part of an
earlier patent, U.S. Pat. No. 1,889,030, and which DID teach that a
four strip incarnation was possible.
The fourth record, then called the Key Print, was made in a bi-pack
with the green record.
The actual implementation of the camera was, of course, for three
strips and not four, as disclosed in U.S. Pat. 2,072,091.
The Key for Three-Strip was, of course, obtained as a silver image from
the green record, at 50 percen density of that principal photography
record. The Key was first printed on the blank receiver stock, after
which the three color records were applied by imbibition.
So, U.S. Pat. No. 1,889,030 taught that three or four strips were
possible, with the Key Print of the four strip color model being
employed for improved edge definition and deep shadow fills.
However, no dual bi-pack camera, if, indeed, there ever was one, left
the laboratory.
This earlier patent, probably forgotten by most researchers, is most
likely where the notion of a Four-Strip Technicolor camera came about.
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CinemaScopeŽ: The Modern Miracle You See without Special Glasses! |
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| ... |
| Posted: Mon Oct 19, 2009 10:16 pm |
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On Oct 18, 5:05 pm, Peter <peterh5... at (no spam) rattlebrain.com> wrote:
Quote: On 2009-10-06 01:53:27 -0700, cine... at (no spam) hotmail.com said:
The original Technicolor 3-strip Optical System 2000058
There was an earlier concept, disclosed as the second part of an
earlier patent, U.S. Pat. No. 1,889,030, and which DID teach that a
four strip incarnation was possible.
The fourth record, then called the Key Print, was made in a bi-pack
with the green record.
The actual implementation of the camera was, of course, for three
strips and not four, as disclosed in U.S. Pat. 2,072,091.
The Key for Three-Strip was, of course, obtained as a silver image from
the green record, at 50 percen density of that principal photography
record. The Key was first printed on the blank receiver stock, after
which the three color records were applied by imbibition.
So, U.S. Pat. No. 1,889,030 taught that three or four strips were
possible, with the Key Print of the four strip color model being
employed for improved edge definition and deep shadow fills.
That's actually the Multicolor 3 Color system utilising a Bi-Pack
and a third film. I didn't realise that Multicolor had a 3 color
process?
Regards,
Peter Mason
Quote:
However, no dual bi-pack camera, if, indeed, there ever was one, left
the laboratory.
This earlier patent, probably forgotten by most researchers, is most
likely where the notion of a Four-Strip Technicolor camera came about.
--
CinemaScopeŽ: The Modern Miracle You See without Special Glasses! |
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| Peter... |
| Posted: Tue Oct 20, 2009 5:00 pm |
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On 2009-10-20 01:16:18 -0700, cinemad at (no spam) hotmail.com said:
Quote: That's actually the Multicolor 3 Color system utilising a Bi-Pack
and a third film. I didn't realise that Multicolor had a 3 color
process?
I don't think so.
I believe the earlier patent discussed a multicolor (not capitalized)
system using a beam-splitter and three or four films, at least one pair
of which were in a bi-pack.
multicolor (multiple colors, in the instant case being three or four,
and IS NOT capitalized) is different from Multicolor (a registered
trademark for a two-color bi-packed system, and it IS capitalized).
For the same reason there is a monopack (any single strip three-color
system, and IS NOT capitalized) and Monopack (Technicolor's trademark
for its 35mm low-contrast three-color reversal principal photography
film, which is really Eastman's Kodachrome Commercial, and IS
capitalized).
The later patent also has Figs. 1 and 2, and which repeat essentially
the same information as the earlier patent.
The earlier patent included multicolor (generic meaning) in its Title
field, and the inventor and assignee was the same as the later patent,
which included Three-color in its Title field and Technicolor Corp in
the Assignee field.
--
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