[CW] Vibroplex Variable Main Spring

Wed Mar 11 07:30:22 EDT 2020

Thanks Grant, it's an alternate method, I was trying to find it on the
original drawing. It wasn't there.

Thanks,

73

DR

On Tue, Mar 10, 2020, 23:02 Grant Youngman <ghyoungman at gmail.com> wrote:

> It appears to me that he is showing options for adjusting the length of
> the mainspring.  In the first case (those shown on the key) the spring is
> held by two retaining screws (25), and you loosen those screws to slide the
> spring and adjust it’s length.  Similar to the early VPlex Presentations.
> In the case of figures 8-10 he is showing an alternative method of
> adjusting the mainspring length by means of a gear and a single retaining
> screw.
>
> Grant NQ5T
>
> > On Mar 10, 2020, at 10:26 PM, D.J.J. Ring, Jr. <n1ea at arrl.net> wrote:
> >
> > Hi Dennis,
> >
> > The placement of those parts isn't shown. The method of the gear
> controlling the length of the mainspring is shown, but it isn't shown on
> the key, unless I'm blind, which I'm pretty blind these days, but it's not
> shown where it goes.
> >
> > Right?
> >
> > 73
> >
> > DR
> >
> > On Tue, Mar 10, 2020, 21:31 Dennis Berry <dennisberry at att.net> wrote:
> > Actually those parts of the drawing are all shown on page 2 of the
> patent. They are cross sections of three different areas.  The patent shows
> it with some sort of a gear driven system (Fig 9) which is a cross cut of
> Fig 8, described in lines 25-40 (roughly) of the last page.
> > (My old shop class teacher would be proud. )
> >
> > Dennis
> >
> >> On Mar 10, 2020, at 8:34 PM, D.J.J. Ring, Jr. <n1ea at arrl.net> wrote:
> >>
> >> 
> >> And I can never find out where in the patent drawings he shows the
> placement of Figures 8, 9 and 10. The attachment places aren't shown. There
> missing. But that's typical of patent drawings, they really don't show the
> patented device clearly! They keep it a secret.
> >>
> >> His device was more complicated at first with a gear that adjusted the
> mainspring. It was simplified with a notch and two machine screws on the
> Presentation model.
> >>
> >> 73
> >> DR
> >>
> >> On Tue, Mar 10, 2020, 19:23 Richard Knoppow <1oldlens1 at ix.netcom.com>
> wrote:
> >>      I found the patent again. Turns out I already had it. This
> >> shows the La Hiff variable main spring on a Lightening Bug type
> >> key. It is USP 2187351
> >> at:
> >>
> https://patentimages.storage.googleapis.com/31/d1/c8/b34c68f33be536/US2187351.pdf
> >>
> >> --
> >> Richard Knoppow
> >> 1oldlens1 at ix.netcom.com
> >> WB6KBL
> >>
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