Some keywords to search on please

Hello,

Need some help with some keywords to stick into google searches please ?

1. Am intrigued by the various linkages that I see stuck onto steam train wheels and would like to better understand what they do and why and the history of the thinking behing them. What are they called please ? See examples in my album called Wheel Links **LINK**

2. Am sure that I have seen threads regarding preventing rust in sheds by placing drop sheets over the lathe and mill and then placing a kerosene lantern beside the lathe/mill. The slight heating effect prevents condensation and therefore rust. What do I have to search for or read about to better understand the physics/chemistry of moisture settling out of the air onto machine tools please ? Any key words to use in a search ? Dew Point ?

Bill

Try Stevensons Link or Walschaerts, but I would point out, these refer to the types of actuating mechanism for the valve gear driven by the wheel links on  multiwheeled locomotives....I'm sure some of our train orientated chums can be forthcoming...

As for dewpoint try Dewpoint.... or condensation...

Edited By John Rudd on 17/06/2018 13:08:02

Bill,

Strangely enough, the word 'linkages' should get you off to a good start ... including these favourites of mine:

**LINK** http://mikespics.ca/2015/05/mechanical-linkages/

**LINK** http://www.gutenberg.org/ebooks/25155

Then try 'kinematic' which should get you to this page at the Smithsonian:

**LINK** https://www.si.edu/spotlight/kinematic-models/introduction

MichaelG.

Your pics look like Walschearts valve gear linkages. See Doug Ashton's site here **LINK**for more info on Walschearts linkages and also Stephensons linkages. there are some good animations of both on YouTube too.

Not sure about leaving a kero lamp burning unattended in the workhsop to stop corrosion. I've heard of low wattage electric lights used for similar purposes. Has been discussed on here before if you do a Google site search you might find it.

Oil heaters produce water vapour,just about the last thing you need in a workshop.

Would advise MOST strongly AGAINST having any hydrocarbon fuelled heater in a workshop.

1) Burning any liquid fuel, or gas will produce water vapour, and lead to rusting.

2) Leaving a combustion heater unattended HAS to be fraught with danger of fire.

A 80Watt "frost stat" tubular electric heater is about as much risk as I take with an unattended heater in my shop.

And you need ventilation, (You produce water vapour too, in your breath). A low level vent to let the heavy water vapour escape, and a high level one to admit replacement, and hopefully, drier air. Both need to be weatherproof, or it defeats the object. Ideally they should have a mesh to prevent all the local insects climbing in for a cosy home.

Rust, or the risk thereof will be greatly decreased by having the shop well insulated. It will prevent the rapid changes of temperature that promote condensation, and will make it less likely that your breath will condense when you start work, before the heater reaches your chosen temperature.

Howard

I have spent many hours convincing clients about condensation being a hot and cold problem particularly in bathrooms ,stairwells and bedrooms.Myself I don't use any heat in a single skin brick workshop with no wall insulation the temperature at it's coldest gets down to 4deg ,I just wear more clothing and using an overnight dehumidifyer and I don't have a rust problem.Unles one keeps the temperature constant 24hrs every day the fluctuation of temperature will give condensation.

Frank

Thanks for all the advice, am currently reading the various links above. PC broke for a while only just got it back. Clearly I need to better understand issues associated with humdity / rut / heat / cold / tin sheds (Aussie)

Bill

Hi Bill I run a small dehumidifier at night in the winter which keeps the temperature up slightly and removes moisture from the shed which is slightly insulated.

David

Thanks for the advice.

I found a previous post where a chap recommended using a couple of 40 watt lightbulbs as a heater to keep the air under a tool cover a little bit warm and prevent dew/rust on the metal.

Bill

Protecting machines in my shop is done by insulating the shed and having a greenhouse heat running all of the time on a thermostat so that it keeps the temperature just above freezing. The heater is one of THESE, they come in different sizes. Some of my woodworking tools also has a coat of woodwax22 on the tables especially the cast topped ones