[modeleng] Re: Parts prices
- From: "Clifton" <clif.gwr@xxxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Tue, 25 Sep 2012 17:57:51 +0100
Hi All,
On Duplex pumps I have been building one of the Southworth steam feed pumps,
the little 3" high one & it is driving me round the twist.
On a full size pump it is usual to have a rocking arm to transpose the down
motion at the end of the piston rods travel to an up motion of the steam
slide valve to make it double acting. ( & vice versa at the top of the
stroke). This little beast uses a slide valve which via steam passages
operates a shuttle valve which then moves the main steam valve in the
opposite direction.
As the whole pump is only 3" high you can imagine the size of the steam
chest which has two slide valves & a shuttle valve in it.
I have now spent about a week trying to get it to work including making
three news sets of slide valves & a new port face. I have trued to slide
valve faces & port face using engineers blue & as far as I can see it is
perfect.
But will it go, will it heck!
I think a bit of redesign is going to happen to get a rocking arm in.
Regards
Clif
----- Original Message -----
From: "Jesse" <fernj1@xxxxxxxxxxx>
To: <modeleng@xxxxxxxxxxxxx>
Sent: Tuesday, September 25, 2012 5:36 PM
Subject: [modeleng] Re: Parts prices
> On 9/24/2012 4:30 PM, Ken Strauss wrote:
>> I'm on your side of the pond (north shore of Lake Ontario).
> Ken, you got any room for expatriates up there? Anyway, my Audel's
> manual tells quite a bit about Mr. Monecky and says it refuses to call
> such a valuable tool a "Monkey Wrench". Mr Monecky lived in Brooklyn,
> NY or at least that is where he is buried. The Audel's gives the date of
> his death but I don't remember much else from the paragraph denouncing
> the use of "Monkey Wrench".
>
> I have gotten a lot of valuable steam engineering information from that
> series of books. One interesting tidbit is how to make a duplex pump
> run properly. Anyone who has ever built one of those little jewels
> usually has problems getting them to run slow. They short stroke most
> times, but if a little bit of "lost motion" is done to the "D" valves,
> the thing will run as slow as wanted. I think I put about .040" slack
> on the valve rod for my three 1-1/2" scale pumps and I can get them to
> run as slowly as desired. If pumping water, I can close off the
> discharge line almost completely and the pump will run at a creep. I
> have one on my 2-1/2" Shay as a boiler feed pump and once you set it, it
> will keep the boiler full.
>
> Jesse in the wee little town of Troy, TN.
>>
>>> -----Original Message-----
>>> From: modeleng-bounce@xxxxxxxxxxxxx [mailto:modeleng-
>>> bounce@xxxxxxxxxxxxx] On Behalf Of Jesse
>>> Sent: Monday, September 24, 2012 5:12 PM
>>> To: modeleng@xxxxxxxxxxxxx
>>> Subject: [modeleng] Re: Parts prices
>>>
>>> On 9/24/2012 3:46 PM, Ken Strauss wrote:
>>> Ken, you wins the seegar even though you left out one letter in Mr.
>>> Mon_e_cky's name .You must have a copy of the same Audels' Manual that I
>>> have.
>>> Adjustable open wrenches are all called Crescent Wrenches over here in
>>> the
>>> American colony probably because the first ones were made by the
>>> Crescent
>>> Tool company . Never heard one called a "shifter". Spanners usually
>>> have
>> a
>>> large opening with either a lug on the ends of the jaws or else steel
>> pins,
>>> depending on how it is to be used. I have seen a spanner or two in
>>> which
>> one
>>> leg could pivot so it would fit more than one size packing gland or
>> whatever.
>>>> You're probably going to tell some story about "Charles Moncky"...
>>>>
>>>> I thought that an adjustable open end wrench was commonly called a
>>> "shifter"
>>>> across the pond. I believe that a "spanner" is a fixed jaw open end
>> wrench.
>>>>> -----Original Message-----
>>>>> From: modeleng-bounce@xxxxxxxxxxxxx [mailto:modeleng-
>>>>> bounce@xxxxxxxxxxxxx] On Behalf Of Jesse
>>>>> Sent: Monday, September 24, 2012 4:09 PM
>>>>> To: modeleng@xxxxxxxxxxxxx
>>>>> Subject: [modeleng] Re: Parts prices
>>>>>
>>>>> Barry,
>>>>> That I can understand as I have a turret (capstan) where my tailstock
>>>> normally
>>>>> goes, but I do a lot of work that requires the turret which has
>>>>> 6 stations so the tailstock sits on the floor. Currently, the box
>>>>> tool, a
>>>> threading
>>>>> die and a couple of drill chucks are mounted on the turret.
>>>>> Sometimes there is also a center cut end mill to allow facing of the
>>>>> work
>>>> and a
>>>>> center drill in another chuck.
>>>>> Funny how two nations with the same language call items by different
>>>> terms. A
>>>>> few years ago I had a problem with "linisher" which is belt sander
>>>>> over
>>>> here.
>>>>> Ah well, we will soon be building weapons to slow down the Taliban
>>>>> and I suppose I will have to make some sort of spear thrower or
>> something.
>>>>> Several years ago I had one of our loggers ask me where the "chuck"
>>>>> for
>>>> the
>>>>> drill press was. I pointed out to him that it was in plain sight on
>>>>> the
>>>> drill press,
>>>>> but he still couldn't see it. It turned out that he called the chuck
>>>>> key a
>>>> "chuck"
>>>>> and it had fallen to the floor where he didn't see it. Loggers is
>>>>> big
>>>> tough blokes,
>>>>> but sometimes have funny names for tools. Over here every adjustable
>>>>> open end spanner (wrench) is called a "Crescent wrench", I suppose
>>>>> because the
>>>> first
>>>>> ones were made by Crescent Tool Company. Spanners are usually forked
>>>> tools
>>>>> (Y
>>>>> shaped) with pins that fit into notches or holes on steam packing
>>>>> glands
>>>> and the
>>>>> like. Little delicate adjustable spanners are used to unscrew the
>>>>> back of
>>>> wrist
>>>>> watches.
>>>>>
>>>>> This brings to the so called "Monkey Wrench". Now how many of you
>>>>> gents know where that name came from?? When I started work as a
>>>>> machinist apprentice at the railroad in 1953, I was issued a ball
>>>>> peen hammer, a flashlight, a 10" Mill Bastard File, and was supposed
>>>>> to get a "Monkey
>>>> Wrench",
>>>>> but didn't. I still have the flashlight and it works as well as it
>>>>> did 60
>>>> years ago
>>>>> though the reflector has darkened considerably. I have a couple of
>>>>> "Monkey Wrenches" just as curiosities.
>>>>> Now, who is going to get the cigar for explaining where Monkey
>>>>> Wrenches
>>>> got
>>>>> their name?? Alan, Tel, Clif, Al Messy????? Only reason I know is
>>>>> because
>>>> I
>>>>> accidentally saw it in my 1921 Audel's Mechanic's Manual.
>>>>>> Jesse,
>>>>>>
>>>>>> I think that the terminology in the U.S. is "Turret lathe". They
>>>>>> were the original "mass production" lathe.
>>>>>>
>>>>>> The capstan is a device sat on the cross slide of the lathe which
>>>>>> indexes round every time the cross slide is wound to the right. The
>>>>>> capstan is pivoted on a vertical axis and contains a number of tools
>>>>>> (usually 6) located radially.
>>>>>>
>>>>>> Almost every bit of film showing factory work during WW2 shows
>>>>>> Capstan lathes at work.
>>>>>>
>>>>>> Regards,
>>>>>>
>>>>>> Barrie
>>>>>>
>>>>>>
>>>>>> ----- Original Message -----
>>>>>> From: "Jesse" <fernj1@xxxxxxxxxxx>
>>>>>> To: <modeleng@xxxxxxxxxxxxx>
>>>>>> Sent: Monday, September 24, 2012 4:56 PM
>>>>>> Subject: [modeleng] Re: Parts prices
>>>>>>
>>>>>>
>>>>>>> Well well, the roller box is very similar to my homemade box tool,
>>>>>>> but of course much nicer. Both accomplish the same thing. No
>>>>>>> rollers in my box tool though. I just use brass bushings that fit
>>>>>>> the stock material which is mostly 5/16" or 1/4" in dia.
>>>>>>>
>>>>>>> Still nothing on a capstan lathe. Is this a type of lathe that is
>>>>>>> installed on a sailing ship capstan????
>>>>>>>
>>>>>>> Jesse the curious one in Troy Tennessee
>>>>>>>> It's one of these:
>>>>>>>>
>>>>>>>> http://www.tangi-flow.com/rollerboxes.php
>>>>>>>>
>>>>>>>> Alan
>>>>>>>> On 24/09/2012 01:02, AC Messer wrote:
>>>>>>>>> I am familiar with a capstan lathe but I too am iterested as to
>>>>>>>>> what is a "roller box".
>>>>>>>>>
>>>>>>>>> Al Messer
>>>>>>>>>
>>>>>>>> MODEL ENGINEERING DISCUSSION LIST.
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