Re: rose reader
- From: dg140@xxxxxxxxxxxxxxxxxxx (Charles Pond)
- To: optacon-l@xxxxxxxxxxxxx
- Date: Fri, 20 Aug 2004 00:44:16 -0400 (EDT)
Hi Phil. Is it with Mike? What will he do with it? Can it be had?
Charles
---
>I know where the protype for the neumatic full display is,
>but I doubt if the person that built is ever going to
>work on it again. he is busy desiging and building
>robots now.
>
>phil
>
>On Tue, Aug 17, 2004 at 10:48:17PM -0400, Charles Pond wrote:
>> The idea of air pressure was suggested to me by a college, gristled
>> industry man several years. He got the idea from an air hockey game. We
>> looked at an initial design. The small parts needed could easily be
>> machined and mass produced. The computer control of the beasty was also
>> considered, and indeed doable. A compressor was needed, but nowadays one
>> would imagine that a small enough one could be had. Most of the time any
>> number of tactile poxcels are idle, so the compressor could be set to a
>> low level mode and some air could be stored for use during that time.
>>
>> So where are all of the various prototypes of the various tactile
>> displays? Whose basement is filled up with these gadgets?
>>
>> Charles
>>
>> ---
>>
>> >Hi.
>> >the rose reader was developed by a f b.
>> >it was extremely mechanical, and took most of a minute to update the
>> >display.
>> >I had a chance to see a protype when I worked for maryland computer
>> >services,
>> >but I don't remember all the details.
>> >another approach that was tried at one time, was
>> >to use air pressure to raise pins. it worked fairly well,
>> >and was pretty fast, but it required an air compressor.
>> >
>> >phil
>> >
>> >On Tue, Aug 17, 2004 at 09:57:33AM -0400, Charles Pond wrote:
>> >> How did the Rose Reader work? Any details?
>> >>
>> >> Charles
>> >>
>> >> ---
>> >>
>> >> >It was talked about in the late 1970's or early 1980's; if I recall
>> >> >recorrectly, it was supposed to be a full-page braille display.
>> >> >
>> >> >Mike Freeman
>> >> >
>> >> >----- Original Message -----
>> >> >From: "Charles Pond" <dg140@xxxxxxxxxxxxxxxxxxx>
>> >> >To: <optacon-l@xxxxxxxxxxxxx>
>> >> >Sent: Monday, August 16, 2004 6:02 PM
>> >> >Subject: Re: P2RD
>> >> >
>> >> >
>> >> >> What is or was the Rose Reader?
>> >> >>
>> >> >>
>> >> >>
>> >> >>
>> >> >> >Probably the same thing that happened to the Rose Reader!
>> >> >> >
>> >> >> >Mike Freeman
>> >> >> >
>> >> >> >On Sun, 15 Aug 2004, Charles Pond wrote:
>> >> >> >
>> >> >> >> Hi Charles. There are no formal optacon parts stores. parts are
>> >> >becoming
>> >> >> >> scarce now. Other off-the-shelf parts are also being
>> >> >> >> discontinued, so
>> >> >> >> board reworks are becoming more necessary and also more cumbersome.
>> >> >> >>
>> >> >> >> There is no combination optacon/Braille display available. The
>> >> >> >> P2RD is
>> >> >a
>> >> >> >> portable reading machine which is intended to come with a small
>> >> >> >> tactile
>> >> >> >> display. That display has not yet been made, and no one seems to
>> >> >> >> know
>> >> >> >> much about what happened to the P2RD at this point.
>> >> >> >>
>> >> >> >> Charles
>> >> >> >>
>> >> >> >> ---
>> >> >> >>
>> >> >> >>
>> >> >> >>> Can some one give me the http address to investigate this optacon?
>> >> >> >>> I
>> >> >am
>> >> >> >>> inquiring for a friend who has an optacon and wishes to get it
>> >> >repaired or
>> >> >> >>> replace it if possible. She wants her machine repaired and would
>> >> >> >>> also
>> >> >be
>> >> >> >>> interested in the Braille display.
>> >> >> >>>
>> >> >> >>> So, can you also tell me of a repair and/or parts address or phone
>> >> >number?
>> >> >> >>>
>> >> >> >>> Charles Helms
>> >> >> >>>
>> >> >> >>> ----- Original Message -----
>> >> >> >>> From: "Charles Pond" <dg140@xxxxxxxxxxxxxxxxxxx>
>> >> >> >>> To: <optacon-l@xxxxxxxxxxxxx>
>> >> >> >>> Sent: Saturday, August 14, 2004 10:02 PM
>> >> >> >>> Subject: Re: P2RD
>> >> >> >>>
>> >> >> >>>
>> >> >> >>>> Hi Beth. TSI did some experiments on a Braille-Optacon device,
>> >> >> >>>> but I
>> >> >> >>>> don't know the results. I have a whopping big binder here of
>> >> >> >>>> their
>> >> >> >>>> research and such, but haven't yet looked through it all. What
>> >> >> >>>> about
>> >> >the
>> >> >> >>>> videoTim, have you looked at that?
>> >> >> >>>>
>> >> >> >>>>
>> >> >> >>>> part of tge issue of a Braille optacon was the need for a
>> >> >> >>>> constantly
>> >> >> >>>> refreshing image on the tactile pad; hence the buzzing at about
>> >> >> >>>> 230
>> >> >times
>> >> >> >>>> per second. The 230 hertz is what turned out by observation to be
>> >> >the
>> >> >> >>>> best tactile refresh rate for the human finger. Neuroscience
>> >> >> >>>> says 60
>> >> >> >>>> Hertz, but TSI's and Stanford's empirical (spell) tests showed 30
>> >> >Hertz as
>> >> >> >>>> the best frequency. The interesting discrepency has not been
>> >> >explained.
>> >> >> >>>> To my knowledge. the P2RD has a 60 Hertz refresh rate. Oleg did
>> >> >mention
>> >> >> >>>> that it might be variable. The pins for the P2Rd display were
>> >> >> >>>> spec'd
>> >> >at
>> >> >> >>>> 1/10 inch spacing, which is coarse compared to the optacon, but
>> >> >better
>> >> >> >>>> for producing Braille characters. In order to have a display
>> >> >> >>>> which
>> >> >can
>> >> >> >>>> produce both Braille and suitable tactile graphic characters, a
>> >> >display of
>> >> >> >>>> 30 or 40 or more pins per inch is needed. So far, not feasible.
>> >> >> >>>>
>> >> >> >>>> Long live the optacon!
>> >> >> >>>>
>> >> >> >>>> Charles
>> >> >> >>>>
>> >> >> >>>> ---
>> >> >> >>>>
>> >> >> >>>>> Hi to all. Re the P2RD: Does anyone have one? I gather from my
>> >> >> >>> research
>> >> >> >>>>> that the characters are shown by pins coming up in shapes of
>> >> >> >>>>> print
>> >> >> >>>>> characters, right? Is there anything out there which would do
>> >> >> >>>>> this
>> >> >but
>> >> >> >>> in
>> >> >> >>>>> Braille? Thanks. Beth
>> >> >> >>>>>
>> >> >> >>>>>
>> >> >> >>>>>
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>
>To unsubscribe at any time, just send a message to:
>
>optacon-l-request@xxxxxxxxxxxxx with the word "unsubscribe" (without the
>quotes) in the message subject.
>
>Tell your friends about the list. They can subscribe by sending a message to:
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>in the message subject.
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>
>
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