"Rob H." <[email protected]> wrote in message
news:[email protected]...
> This week's collection of photos has been posted:
>
> http://55tools.blogspot.com/
>
>
1687. Obviously a folding rule of some kind. I guessing it is made from
brass to be non sparking or non rusting. I have seen this type of rule from
different materials and combinations thereof.
"Rob H." <[email protected]> wrote in message
news:[email protected]...
> This week's collection of photos has been posted:
>
> http://55tools.blogspot.com/
>
>
> Rob
1688 Cable loom clip???? I'm sure I've seen it somewhere.
1690 Aluminium heatsink for some semiconductor. Thyristor ? Prolly 60's /
70's ??
1692 Switch sequencer, driven by "clock" motor seen on RHS. Programmed by
pegs placed in the drum.
Thanks Rob, keep it up. :)
"Rob H." <[email protected]> wrote in message
news:[email protected]...
> This week's collection of photos has been posted:
>
> http://55tools.blogspot.com/
1689 looks like part of a feather board, used to create gentle pressure to
push work against a fence when routing or circular sawing
On 6 Aug, 09:17, "Rob H." <[email protected]> wrote:
> This week's collection of photos has been posted:
>
> http://55tools.blogspot.com/
>
> Rob
1690 is a masochist's insole.
Rich Grise <[email protected]> fired this volley in
news:[email protected]:
> If it was liquid-cooled, it'd be a block
> with tubes bonded to or embedded in it.
Well, Rich, no... I have worked on similar-looking 'sinks that held
stud SCRs with the whole affair immersed in a tank of silicone oil. (Old
EMI CAT machines)
In fact, there's a PC on the market (for high-end gaming) that floods
the entire chassis with oil, for a similar effect.
LLoyd
"Rob H." <[email protected]> wrote in message
news:[email protected]...
> This week's collection of photos has been posted:
>
> http://55tools.blogspot.com/
>
>
> Rob
1690 heatsink for a power transistor
Steve R.
In article <[email protected]>, "Rob H." <[email protected]>
wrote:
> This week's collection of photos has been posted:
Let's see...
1687 - Folding rule, obviously, but for some specialized purpose;
possibly it has a draft scale for pattern making (for cast iron or other
similar cast metals)
1688 - This looks somewhat familiar, but I'm not quite sure where.
Possibly it's a holder for a (rather large) lavaliere microphone, to be
clipped onto one's attire. The microphone capsule, of course, would be
held in the circular portion. It could also be a clip for some other
arbitrary use, like holding sunglasses on a car visor when they're not
needed.
1689 - Probably a (part of) a featherboard, used with a table saw or
related tool to prevent wood from kicking back. The pictures show it
upside-down from its usual application.
1690 - Heat sink for a large (older) power transistor or other
three-leaded semiconductor.
1691 - Possibly a tool to apply feet or ferrules to the ends of canes,
chair or table legs, etc.?
1692 - Timer/controller from some piece of equipment; I'd guess it's for
a "motion" sort of advertising light, and the big drum rotates at 1 rpm,
making each numbered division one second. The sequence seems to be
programmable by installing and removing the little black plastic bits on
the drum. Contact 'S' looks like it was overloaded...
Now to read other guesses.
--
Andrew Erickson
"He is no fool who gives what he cannot keep to gain that which he cannot
lose." -- Jim Elliot
Rob H. wrote:
> This week's collection of photos has been posted:
>
> http://55tools.blogspot.com/
>
>
> Rob
1687 - Folding rule, not sure what it was used for though with that
strange scale.
1688 - Cable loom clip
1689 - Part of a feather board for a saw/router/shaper. Holds the board
from kicking back.
1690 - Heat sink. From a very early semiconductor.
1691 -
1692 - Sequential switch. Not sure what it's from but it could be for
lights or a display controller.
--
Steve W.
Rob H. wrote:
> This week's collection of photos has been posted:
>
> http://55tools.blogspot.com/
>
>
> Rob
1691 - Screwdriver shaft borer. I'm sure we've all been infuriated
trying to unfasten screws overtorqued by careless apprentices, and none
would admit to it. So you bore out their screwdriver shafts to a wall
thickness of .03" and fire the one who twists his shaft.
1692 - Spelling Bee aid. In the heyday of spelling bees, millions of
dollars could depend on the outcome of a match. By greasing the right
palms, a parent might procure the word list, but what if the child had
trouble memorizing them? You would program this "music box" with the
correct spellings and let it play over the public address system during
the match. People in the audience would assume it was an ice-cream
truck outside.
> 1691) Hmm ... an interesting thing -- and it looks as though there
> were multiple sources of illumination or multiple reflections
> from a display case, ad the shadows are showing up in multiples
> in some places.
>
> I think that there should be a belt which goes from the tapered
> block down under the end, and back up to the lever operated
> winch on the other side to pull the workpiece (which looks
> somewhat like a spoke from a wagon wheel) to allow drilling or
> shaping the upper end.
Yes, it's a wagon wheel spoke, the tool cuts a round tenon on it.
Rob
"Northe" <[email protected]> wrote in message
news:[email protected]...
> 1687: I think it's a something like a gunner's level used for determining
> the correct angle of a cannon barrel to send the projectile a certain
> distance.
>
> Northe
Correct, it's a French Sector that was used for gunnery calcs. The rest of
the answers for this week's set can be seen here:
http://answers296.blogspot.com/
Rob
>>
>> http://answers296.blogspot.com/
>
> Hmm ... while I could accept that 1692 is a punch card emulator,
> the phrase "same sequence as the punched paper tape" generates problems.
> The punched tape used by most computers was an eight-level tape (eight
> holes) of which one served as a parity bit.
>
> The punched cards had 12 rows of holes, of which the first 9
> were for the digits '1'-'9' and '0' was represented by the absence of
> any punch there. There were three other rows ("10", "11", "12") which
> were used to encode columns when letters or symbols were represented.
>
> The drum has a group of ten fingers corresponding to the 1-9
> plus apparently a '0' bit, plus another group of nine fingers, of which
> eight can represent all of the states of those three bits, though there
> is no need to represent all of the three card bits off, the one labeled
> 'U' appears to generate a pulse for ever position to tell the system
> when to accept the setting of the other switches, and the 'V' one
> appears to be a single bit to indicate the first or last position on the
> drum.
>
> I am curious as to how many actual positions the drum has. The
> punched cards had 80 columns, of which the first 72 were commonly used
> for program data, and the remaining eight were used to contain a
> sequence number, so if the deck of cards happened to be dropped, it
> could be sorted back into sequence by another machine. :-)
>
> There were other (smaller) cards which had 96 columns (actually
> two rows) and which used four bits to encode the basic "1-9" rows.
>
> Looking at the programming keys in this drum, it appears that it
> was producing binary code instead of character-based code, as there
> normally would not be more than one punch (bit) in the 1-9 rows (here
> A-J or A-K.
>
> I could probably look up the codes for the PDP-11/LSI-11
> machines to see what the visible part of the sequence tries to do, but I
> don't see any point in that at the moment.
>
> But that is a neat collector's item these days.
>
> Enjoy,
> DoN.
I don't know much about this device but I'll pass your comments on to the
owner of it and see what he has to say.
Rob
Lloyd E. Sponenburgh wrote:
> Rich Grise <[email protected]> fired this volley in
> news:[email protected]:
>
>> If it was liquid-cooled, it'd be a block
>> with tubes bonded to or embedded in it.
>
> Well, Rich, no... I have worked on similar-looking 'sinks that held
> stud SCRs with the whole affair immersed in a tank of silicone oil.
> (Old EMI CAT machines)
>
> In fact, there's a PC on the market (for high-end gaming) that floods
> the entire chassis with oil, for a similar effect.
And there are folks who dunk the whole machine into a liquid nitrogen bath.
On Thu, 06 Aug 2009 16:27:17 -0500, Lloyd E. Sponenburgh wrote:
>> http://55tools.blogspot.com/
>
> 1689 is definitely a feather board, and looks to be a ShopSmith one.
>
> 1690 appears to be a heatsink for immersion in oil or water, though I
> don't recognize the device hole configuration.
Actually, it's for forced air. If it was liquid-cooled, it'd be a block
with tubes bonded to or embedded in it.
That hole configuration was used many, many, many years ago for high-
power germanium transistors. The hole in the middle accepts a stud
that was integral with the package, and the other three are emitter,
base, and collector, not necessarily in that order.
Hope This Helps!
Rich
On 2009-08-06, Rob H. <[email protected]> wrote:
> This week's collection of photos has been posted:
>
> http://55tools.blogspot.com/
Posting from rec.crafts.metalworking as always.
1687) At first glance, a folding carpenter's rule, but a closer
look suggests that it is for navigation with maps.
1688) A clip-on paper guide -- perhaps for an inkjet printer
or something similar.
1689) This looks like an anti-kickback guide for a wood saw, except
that either the photo is reversed, or it was photographed from
the bottom.
The fingers allow the workpiece to slide towards the blade, but
if the blade jams in the work and tries to kick it back towards
the operator, the fingers will bite in and hold it in position.
1690) A heatsink for a single transistor -- of the old doorknob
style. I forget the TO-? number, but it was one of the early
power transistor styles. The design suggests that it is cast,
and then just machined flat where the transistor contacts it
(through a possible insulating mica and some silicone based
heatsink compound.
The shape suggests to me that it was probably from a car radio,
and likely one from before stereo was common.
1691) Hmm ... an interesting thing -- and it looks as though there
were multiple sources of illumination or multiple reflections
from a display case, ad the shadows are showing up in multiples
in some places.
I think that there should be a belt which goes from the tapered
block down under the end, and back up to the lever operated
winch on the other side to pull the workpiece (which looks
somewhat like a spoke from a wagon wheel) to allow drilling or
shaping the upper end.
1692) A drum encoder switch. 19 circuits individual switched by
the black dots in the drum's slots. It is turned by an old
electric clock style of synchronous gear motor, and I would
guess that it provides one rotation of the drum every 24 hours,
to switch on and off things like room lights, or to ring bells
in up to 19 rooms at half-hour increments.
No -- perhaps not half hour increments, alternating (even) hours
are not listed, and it looks as though it may either duplicate a
second time around the drum, or go up to 48 or 50 positions.
The letters above the switch fingers are not to indicate letters
being sent, but rather to identify the fingers, using a scheme
similar to those on connector pins, where letters likely to be
mistaken for others are dropped. Here, we are missing 'I', 'O',
'Q', and there is no need for 'X', 'Y', and 'Z', as all the pins
are already accounted for.
Now to see what others have suggested.
Enjoy,
DoN.
--
Email: <[email protected]> | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---
On 2009-08-07, Rob H. <[email protected]> wrote:
>
> "Northe" <[email protected]> wrote in message
> news:[email protected]...
>> 1687: I think it's a something like a gunner's level used for determining
>> the correct angle of a cannon barrel to send the projectile a certain
>> distance.
>>
>> Northe
>
>
> Correct, it's a French Sector that was used for gunnery calcs. The rest of
> the answers for this week's set can be seen here:
>
> http://answers296.blogspot.com/
Hmm ... while I could accept that 1692 is a punch card emulator,
the phrase "same sequence as the punched paper tape" generates problems.
The punched tape used by most computers was an eight-level tape (eight
holes) of which one served as a parity bit.
The punched cards had 12 rows of holes, of which the first 9
were for the digits '1'-'9' and '0' was represented by the absence of
any punch there. There were three other rows ("10", "11", "12") which
were used to encode columns when letters or symbols were represented.
The drum has a group of ten fingers corresponding to the 1-9
plus apparently a '0' bit, plus another group of nine fingers, of which
eight can represent all of the states of those three bits, though there
is no need to represent all of the three card bits off, the one labeled
'U' appears to generate a pulse for ever position to tell the system
when to accept the setting of the other switches, and the 'V' one
appears to be a single bit to indicate the first or last position on the
drum.
I am curious as to how many actual positions the drum has. The
punched cards had 80 columns, of which the first 72 were commonly used
for program data, and the remaining eight were used to contain a
sequence number, so if the deck of cards happened to be dropped, it
could be sorted back into sequence by another machine. :-)
There were other (smaller) cards which had 96 columns (actually
two rows) and which used four bits to encode the basic "1-9" rows.
Looking at the programming keys in this drum, it appears that it
was producing binary code instead of character-based code, as there
normally would not be more than one punch (bit) in the 1-9 rows (here
A-J or A-K.
I could probably look up the codes for the PDP-11/LSI-11
machines to see what the visible part of the sequence tries to do, but I
don't see any point in that at the moment.
But that is a neat collector's item these days.
Enjoy,
DoN.
--
Email: <[email protected]> | Voice (all times): (703) 938-4564
(too) near Washington D.C. | http://www.d-and-d.com/dnichols/DoN.html
--- Black Holes are where God is dividing by zero ---