Member postings for Sam Stones

Dave!

You SOD, you have the negative back to front!!!

Sam

Frances IoM said

'Clogs were still readily available during my childhood in NW England for operatives in cotton mills'

... and kids like me in primary and the first few months of secondary school. I was banned from the slides on the frozen playground. The irons apparently tearing up the nice smooth surface the older kids had produced.

Clogs were lovely and warm, and could make sparks by kicking the concrete a glancing blow.

The co-op was always busy in the clog-repair shop.

Someone in the toolroom was not impressed when he caught me winding a 0-1 around by gripping the thimble in my fist - "... and stop swinging it around like a clog iron", he yelled.

Another pass-time, although I never saw one was 'clug feytin o'rt moss'.

Sam

Edited By Sam Stones on 26/05/2019 21:52:25

In the 1891 Census, my paternal grandfather aged 15 was record as Blacksmith. They were tough in those days 

Ten years later the 1901 Census shows him as Agricultural Engineer. When I checked for this jump in his status, it transpires he may well have remained as a Blacksmith. He died while my father was only six, so I didn't get a chance to ask. 

Some of these are interesting ...

JOBS IN LANCASHIRE - Extracted from the 1881 Census records

Catcher In Paper Mill

Certified School Mistress

Clogger’s Wife

Colliery Tally Shouter

Engine Driver In Bakehouse

Formerly A Cotton Reeler. At 87 - Too Old

Fustian Dyer

Half Timer

Hooker In Warehouse (Cotton Manuf)

Omnibus Inspector (Cab Man)

Sand Hawker

Skinner Of Hides

Street Sweeper (Scavenger)

Stripper & Grinder In Cotton Factory

Throstle Overlooker

Anyone wanting a more complete list can send me a PM.

Sam

Edited By Sam Stones on 25/05/2019 02:58:01

It still happens down here Tim

A good one Rod. Not so brutal.

I noticed that I was holding my breath at several stages as his soldering iron touched where it shouldn't have.

With several thermoplastic mouldings, there was a potential for one or other to be polyacetal (POM).

The fumes from burning POM can lift your head off, so be careful chaps.

Sam

Back again Bill.

I thought you'd be interested in the (potential) consequences of water leaking into the inside of your cordless tooth brush.

Matthias doesn't often 'DO' strip-downs.

**LINK**

Sam

Not a railway sign this time, but it made me smile.

Back in the 70’s, freeways were ‘coming into fashion’. One of the early ones to be constructed was a length of about eight km taking traffic out of the city. At the end furthest from the city was a ‘T’ intersection.

It caused the inevitable pileup.

Here, drivers of semi-trailers had to make tight left-hand turns to clear the corner building. On this corner had been a delicatessen, a fact only made clear following an over-tight left-hand turn. A large truck had torn away a small section of the shop awning.

Revealed behind the crumpled mess was some of an old sign.

It read "DELICATE____".

And, I didn't have a camera.

Sam

Edited By Sam Stones on 07/05/2019 23:14:57

At an 'S' shaped level crossing down here, there was once a sign for motorists which read ...

SIGNAL BEFORE TURNING

Clive, I thought it said "Do not use toilet unless train is in motion!"

Apologies Dave, I can add nothing about NSU.

Chris’s mention of Cyclemaster however, brought back a flood of memories. I clocked up many miles on my 32cc version. The main setback was those messy coupling quadrants. Made from a certain grade of rubber, if oil got to them they turned into a squishy, sticky mess.

Just before I sold it in ’56 to make way for the (no longer avoidable) OHMS invitation, I fitted the bike with a ‘long-range’ BSA Winged Wheel pannier-style petrol tank. With a pocket full of rubber quadrants and two tanks, Lands End to John O'Groats was a distinct possibility.

Sam

Edited By Sam Stones on 01/05/2019 22:45:36

George - Re Galahad ... I wouldn't know where to start (or finish), although I'm reminded of a sentence which starts with ...

I is ......

I is the ninth letter of the alphabet.

Sam

Was it this one George?

The publican of the Pig and Whistle ordered a replacement sign for his establishment. Upon viewing the new sign, he expressed dissatisfaction to the sign maker. He asserted that there was too much space between pig and and and and and whistle.

Sam

This might open another tin-of-worms.

Some may have heard/read the word 'and' written consecutively five times in the same sentence.

Sam

Where would I be without your help Michael?

Sam

I've removed my dark glasses, and can hear much better.

Definitely a significant error of mine Michael.

Thanks for bringing it to my attention, and apologies to all.

Cycloidal NOT involute!

It's time this SOB packed his bags.

Sam

Here are the links ...

Part A

**LINK**

Part B

**LINK**

Phew!!!

Sam

As a convenience, here is roughly where Thread Part A ended

To conclude, perhaps I should have carried the exercise to include deepening the meshing, i.e. crossing over the two PCD’s. However, I’m inclined to think that the results would be fairly obvious in that the teeth/leaves/pins would soon clash.

Unlike the previous exercise where contact of wheel teeth and pinion leaf flanks produced slight changes of contact traces (especially the ‘On centreline and 0.1mm offset), the round pins of the lantern produced smooth curves. Similarly, as here …

… the cross-overs of the pressure angles are less severe.

Finally, and despite my own luck, only slight changes in depth from the theoretical (i.e. less than 1.0mm) suggest that depthing, at these sizes in particular, needs to proceed with extra care. No doubt for those with depthing experience, you will recognise how the meshing behaves. Too deep and there will be a gnashing of teeth? Too shallow, more gnashing?

Links to both albums are here …

Meshing with Cycloids

https://www.model-engineer.co.uk/albums/member_album.asp?a=50467

Meshing with Lantern pinions

https://www.model-engineer.co.uk/albums/member_album.asp?a=50528

Thanks for everyone who helped.

Sam

Apologies if this mesh came unstuck.

What started as a simple (CAD) depthing exercise between the wheel teeth and pinion leaves of John Wilding’s large wheel (290 x 8) skeleton clock, turned into a rather protracted undertaking.

See here … **LINK**

There were complimentary hints too, that I should instead direct it for M.E. publication. However, for various reasons I am no longer attracted to the idea. I had already enjoyed (and struggled) with submitting three articles and have a clear idea of how much work is involved.

As mentioned in other places, I have never carried out a practical depthing exercise of gear wheels/pinions. Perhaps I was lucky enough to get away with drilling the pivot holes in the skeleton clock plates even before I had cut the wheels, pinions and arbors. However, following John Stevens’ design, the clock has been running since about 2011.

In conjunction with the meshing details in the previous thread, and Michael Gilligan’s interesting suggestion, these latest images show how an 8pin lantern pinion would mesh with the large (290tooth) wheel (refer John Wilding’s ‘Large wheel skeleton clock).

As before, I constructed the wheel teeth according to ‘involute’ data via BS 978: Part 2. The diameter of the lantern pins matches the thickness of the pinion leaves in the previous thread. Obviously, the front disc of the lantern pinion is missing for clarity.

As before, this series includes meshing-depth decreases from ‘on centre’ to include offset of 0.1mm, 0.25mm, 0.5mm, and 1.0mm. The wheel teeth drive the (pinion) pins to the right.

This is incomplete. Please go to Part B

Sam

This thread was becoming such a mesh, that I decided to deal with the lantern pinion issue (suggested earlier) under another title.

Once it's loaded, I'll leave a link on this thread.

Sam

From your question Bazyle, here are two identical ‘gears’ in mesh.

I chose to use the 8-leaf pinions as a simple and quicker method to get the results. When I was doing the 290-tooth wheel meshing with the 8-leaf pinion, it was quite laborious ‘chasing’ a pinion tooth with a wheel tooth. There’s nothing in my CAD package that allows any sort of dynamic interaction.

This close-up shows the contact trace, a slightly wobbly blue line at an angle of about 13.7 degrees.

I have to confess that in view of the symmetry and a somewhat lazy attitude, I flipped (mirrored) a half-trace (left to right and top to bottom).

Here's the plot of the pressure angle, also featuring the mirrored data.

I couldn't bring myself to reduce the depth and plot each one as I did for the 290-8 and 198-7 pairs.

Sam