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Have you ever seen this symbol ?

Discussion in 'Misc Electronics' started by Rich, Apr 5, 2005.

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  1. Rich

    Rich Guest

    I think I saw it (or something like it) on a cirquit diagram in the
    1950s. Any idea which component it is? (I am not an electronics pro).

    Thank you

    To email me remove the dog from my address.
  2. John Miller

    John Miller Guest

    Could be a tapped inductor, but it's a bit hard to tell, out of context.

    I don't think it's random access memory, although it does look a little
    like Aries (the RAM).

    John Miller
    email domain:; username: jsm(@)
    Surplus (For sale or trade):
    Tektronix 465B oscilloscope
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  3. Rich

    Rich Guest

    Thank you. If anyone could point me to a URL that shows a similar
    symbol, I'd much appreciate it.

    To email me remove the dog from my address.
  4. Ray L. Volts

    Ray L. Volts Guest

  5. Ritch

    Ritch Guest

    It could well be. Can you tell me what that symbol would be used to
    denote in 1950s electronic schematics?

    Thank you


    To email me remove the dog from my address.
  6. IEEE std 315 refers to something that looks like what you drawn as a
    partial transformer (para 6.4.20)

    Anyway, "IEEE Std 315 - Graphic Symbols for Electrical and Electronics
    Diagrams (Including Reference Designation Letters)" would be a good
    place to look if you have access to it.

    More of the circuit diag. may be helpful.
  7. DaveC

    DaveC Guest

    As someone else suggested, it looks like a very small winding of a
    transformer, possibly center-tapped.

    Show us the symbol in context of a portion of the diagram.
    Please, no "Go Google this" replies. I wouldn't
    ask a question here if I hadn't done that already.


    This is an invalid return address
    Please reply in the news group
  8. JeffM

    JeffM Guest

  9. Ritch

    Ritch Guest

    I wish I could. I am going entirely from memory. I think the symbol
    may have been enclosed in a circle, like transistor symbols are. I
    also think there was a bit more to it than what I drew. there may have
    been a short line crossing the central vertical line, or something.


    To email me remove the dog from my address.
  10. Don Bruder

    Don Bruder Guest

    Now that you've said that, chances are high that you're never going to
    get a *CORRECT* answer. Lots of guesses, for sure, but no way to know
    that any of them are right or wrong.

    Without knowing *FOR SURE* what it's supposed to look like, as opposed
    to your now-known-to-be possibly faulty/erroneous drawing from memory,
    it could be literally ANYTHING, from a block-diagram symbol for
    "turbocharged V8 engine" to a loose eyebrow hair that fell on the
    original drawing while it was being made and then somehow got propagated
    into future copies, to a hobo-cant "Avoid this house - owner has vicious
    dog and shoots at hobos" symbol, or an ancient etruscan glyph meaning
    "god" - there's simply no way to tell that doesn't involve guessing,
    with no ability to verify the guess as right, wrong, or otherwise.

    Lack of context is also contributing to making it much more difficult to
    pin down what the intended/correct meaning is - were it shown as part of
    a circuit, it might be possible to figure out "It has to be the symbol
    for a _______ because that's the only component that makes even a little
    bit of sense at this position in a circuit like this."

    I've got a similar "problem" with a word from chemistry - I remember my
    high-school chemistry teacher using a several-syllable word that started
    with an "am" sound, which was applied to a class of materials/compounds
    (plain old water happens to be one of them) that could be classified as
    both acid AND base, depending on the pH of what it was being combined
    with - mixed with something strongly acidic, a material to which the
    word was applicable would behave as a mild base. Mixed with a strong
    base, it would behave as if it were a mild acid. Mixed with material
    that was neither acid nor base, it behaved as if it were neither acid
    nor base itself. I've searched for literally years to find someone who
    can tell me again what that word was, with no luck at all. (Asking the
    teacher isn't a viable option, since he managed to find himself
    splattered all over several hundred feet of highway and the
    grille/hood/windshield of a drunk's pickup not long after I finished his
  11. Concur on all points. Looks like an astrological symbol to me,
    but what do I know.
    Ouch. Hope you didn't like him very much.


    Mark L. Fergerson
  12. Don Bruder

    Don Bruder Guest

    Ouch. Hope you didn't like him very much.[/QUOTE]

    Eh... He was OK. Not the "bestest of the best" I ever encountered, but
    reasonably well above the "He's a teacher, therefore he's the enemy"
    mark. He also ran the school chess club, introducing me to the joys (and
    frustrations...) of the game, routinely beating the pants off me and
    most comers for what seemed like ages.
    Mark, I think you may have just pulled a rabbit outta yer rump! That
    looks suspiciously like the word I've been trying to find for so long.
    Lemme go do a lookup and see...


    Having the characteristics of both an acid and a base; Capable of
    reacting chemically either as an acid or a base.

    YES!!!! THAT'S IT!!!! HOORAY!!!!!!

    20 years of on again, off again searching FINALLY recovers "the lost

    I've had chemistry majors look look at me like I had three heads when
    I've asked. A senior chemist at Dow Chemical in Midland Michigan laughed
    at me and said there's no word that fits the definition I gave, only a
    hyphenated phrase I've long since forgotten. College chem instructors
    scratched their heads and said "idunno". Searches through dictionaries
    turned up nothing. (Ever try looking up a word based on its
    definition??? OY! Wotta pain!) At times, I even began to wonder if I was
    imagining him using it.

    You're my hero, Mark! :)

    Well, maybe not "hero", but boy is it good to know I wasn't dreaming all
    these years!
  13. Barry Jones

    Barry Jones Guest

    In case you're interested, I use an old PC based dictionary, The
    American Heritage Talking Dictionary, that will search the definitions.
    I put in "base and acid and chemical," and "amphoteric" was the only
    result. The program seems to be part of Compton's Home Library, it may
    still be available. The OED on disk would probably be able to do that as
    well. I can get into an online version through my college, but it's a pain.
  14. JeffM

    JeffM Guest

    I use an old PC based dictionary,
    Haven't installed it on my current box, but yeah. It's good.*&loc=revfp2&clue=base+acid+chemical
  15. Ritch

    Ritch Guest

    Oh great! You come in here and undermine my tentative lifeline to my
    long-lost component , and in the process solve your long-lost physics
    puzzle. There's justice for you! :-[

  16. Don Bruder

    Don Bruder Guest

    Uh... Sorry, Rich...

    But let's face it... Mine was, unlike yours, an "accurate drawing", so
    to speak...

    Just a matter of"waving it in front of the right set of eyeballs" to get
    the answer.

    Yours, on the other hand... Well, as you said yourself, it might not
    even be the symbol you're remembering. We're STILL trying to guess
    whether what you drew actually has any relationship to the symbol you
    think you remember, and if it does, what symbol (of several possibles,
    in several different areas of specialization) it could be.

  17. Eh... He was OK. Not the "bestest of the best" I ever encountered, but
    reasonably well above the "He's a teacher, therefore he's the enemy"
    mark. He also ran the school chess club, introducing me to the joys (and
    frustrations...) of the game, routinely beating the pants off me and
    most comers for what seemed like ages.[/QUOTE]

    Well, shit. Now you can't look him up and whup him (assuming you
    got better than you were then).
    And I wasn't even a chemistry major. Truth be told, the only
    reason I remember it is that my pattern-recognition wetware keeps
    trying to break it down into components "am" from "ambi" and
    something referencing photography, so that'd make it mean "can't
    decide whether it's black or white".
    That's quite all right with me; heroism is usually an attribute
    awarded posthumously. Especially for doing something right while
    screwing up...

    Mark L. Fergerson
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