Author Topic: S.L. Bailey  (Read 2473 times)

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Offline Hutch

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Re: S.L. Bailey
« Reply #50 on: 09 Nov 2018 at 02:26 »
Yes I agree Leon, The bike in the picture appears to be from a later period than stated in Clew's book, I had not manged to look up a more accurate date so put "circa" on the date :-)  (Lunch times at work are way too short!). I have  also found it difficult to find evidence of Bailey's actual input into the earlier Douglas OHV designs and as a result started looking at Walter Moore's work at Douglas for clues. I have not found much so far but did find the starting point that precipitated his being employed by them - the 3 speed gearbox patent.

Cheers

Ian
« Last Edit: 12 Nov 2018 at 23:49 by Hutch »

Online cardan

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Re: S.L. Bailey
« Reply #51 on: 12 Nov 2018 at 11:26 »

The Grand Prix at Le Mans on 28 August 1920 was written up in the Motor Cycle on 2 September. Bailey was not there. There were three Douglases entered, in the hands of Alexander, Kickham and Doisi. (Was Doisi riding the bike that Bailey would have been riding were he not on the boat on his way to Australia?) Alexander was extremely fast: a nail in his tyre delayed his start by about three minutes, but he was leading after two 10-mile laps. After 16 laps his lead was 20 minutes! Alas he stripped second gear "probably owing to the fact that these machines have no clutch", and when he stalled at one of the hairpins and accepted a push to get going again, he was disqualified.

No clutch eh? Interesting. If you have a look at the photos of the event on Gallica (the National Library of France website), for example Kickham on his bike https://gallica.bnf.fr/ark:/12148/btv1b530516117 , you can see that these machines had a Bailey-designed shock absorber built into the flywheel, but no clutch on either the flywheel or the gearbox. Bailey signed the patent application for the shock absorber on 21 August 1920, the day he sailed for Australia.

Did these bike have a sump under the engine? If not a sump, then what?

Leon

Online cardan

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Re: S.L. Bailey
« Reply #52 on: 12 Nov 2018 at 11:34 »

Here's the drawing from Bailey's transmission shock absorber patent, GB172093, granted in November 1921. From the outside, the flywheel looks to house a clutch, but doesn't.

Leon

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Re: S.L. Bailey
« Reply #53 on: 12 Nov 2018 at 20:26 »
Did these bike have a sump under the engine? If not a sump, then what?

The rider's shoe, behind the gear-change mechanism!

The alloy wick lubricators on the rocker spindles were also a Bailey design. The patent was GB187502 issued in 1922.

Leon

Offline Hutch

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Re: S.L. Bailey
« Reply #54 on: 13 Nov 2018 at 03:40 »
Great work Leon!

I have been re-reading The Best Twin and came across a list of patents in Appendix 1 (pg 229 - 238 in ed. 2). There appear to be 49 (?) that Bailey's name are on and a lot are related to the RA model.

As we know through the threads on this forum and NCR, Doug has done an amazing amount of research in this area and noted to me in a PM that Bailey's first patent with Douglas was lodged on 13th May 1918 with W. Douglas, no. GB 126161 and that Bailey even neglected to put Douglas Motor's as an applicant on some of the later ones! Bailey was quite prolific until he left for Australia on 16th Jan 1925 with Catherine, Dinah and Ian, (his occupation simply listed as "Engineer") , His last patent with Douglas appears to have been lodged 24th September 1924 relating to RA pistons.

-Ian

Offline Hutch

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Re: S.L. Bailey
« Reply #55 on: 13 Nov 2018 at 23:20 »
Here is a chronological list of patents I found on Espacenet  for Stephen Leslie Bailey (and others). This includes some German, French and US patents so the list is longer than that shown in The Best Twin. Hopefully i have captured them all against date of application correctly. Please let me know if you find any errors and omissions and I will edit the list.

Date of             Title                                                                                  Publication         Publication
Application                                                                                             number                date

13-May-18   Improvements in the Manufacture of Motor-cycle Frames.   GB126161 (A)   8/05/1919
22-May-18   Improvements in or relating to Power-transmission Clutches.   GB127099 (A)   22/05/1919
13-Jul-18           Improvements in or relating to Cooling Devices for the
                        Pistons of Internal-combustion Engines.                           GB127757 (A)   12/06/1919
13-Jul-18           Improvements in or relating to Valve-operating Mechanism
                        for Internal-combustion Engines and the like.                   GB127146 (A)   29/05/1919
13-Jul-18           Improvements in or relating to Sight-feed Lubricators.           GB129785 (A)   14/07/1919
4-Mar-19           Power-transmission clutch                                                   US1371542 (A)   15/03/1921
26-Mar-19           Improvements in and connected with the lubrication of
                        pistons                                                                           GB138478 (A)   12/02/1920
22-May-19   Schmierung fuer Kolbenbolzen                                           DE334127 (C)   10/03/1921
12-May-19   Valve-operating mechanism for internal-combustion engines   US1399941 (A)   13/12/1921
12-May-19   Sight-feed lubricator                                                           US1346942 (A)   20/07/1920
27-Mar-20           Improvements in or relating to lubricating pumps for
                        internal combustion engines                                           GB160364 (A)   24/03/1921
29-Mar-20     Improvements in or relating to lubrication indicators and
                        regulators for internal combustion engines                           GB160365 (A)   24/03/1921
2-Jun-20           Lubrication of pistons                                                           US1437585 (A)   5/12/1922
23-Aug-20           Improvements in or relating to power-transmission clutches   GB170729 (A)   3/11/1921
23-Aug-20           Improvements in or relating to valve controlling and
                        operating mechanism for internal combustion engines           GB173016 (A)   23/12/1921
26-Aug-20           Improvements in or relating to the lubricating of the valve
                        mechanism of internal combustion engines                           GB173270 (A)   28/12/1921
26-Aug-20         Improvements in or relating to cycles and the like           GB173269 (A)   28/12/1921
26-Aug-20      Improvements in or relating to the cylinders of internal
                        combustion engines                                                           GB174968 (A)   26/01/1922
26-Aug-20           Improvements in or relating to internal combustion engines   GB172093 (A)   28/11/1921
17-Jun-21           Improvements in pistons for internal-combustion engines   GB187281 (A)   17/10/1922
20-Jul-21           Improvements in or relating to brakes for cycles and like
                        vehicles                                                                           GB187687 (A)   20/10/1922
11-Nov-21           Improvements in fastening and coupling dynamo-electric
                        machines to internal combustion engines                           GB196010 (A)   11/04/1923
16-Nov-21           Improvements in saddles for use on motor cycles and the
                        like                                                                                   GB192219 (A)   1/02/1923
19-Nov-21           Improved means for clamping or anchoring single or
                        multiple strand cables                                                           GB193923 (A)   8/03/1923
10-Dec-21      Improvements in or relating to the lubrication of the valve
                        mechanism of internal combustion engines                           GB187502 (A)   26/10/1922
24-Jun-22           Improvements in the induction systems of internal
                        combustion engines                                                           GB201715 (A)   9/08/1923
8-Jul-22           Improvements in pillion seats for use on cycles, motor
                        cycles or the like vehicles                                                   GB203126 (A)   6/09/1923
8-Jul-22           Kolben, insbesondere fuer Motoren mit innerer Verbrennung   DE390053 (C)   16/02/1924
18-Sep-22           Perfectionnements apport├ęs aux pistons pour moteurs
                        ├  combustion interne                                                   FR556216 (A)   13/07/1923
19-Sep-22           Saddle                                                                           US1502975 (A)   29/07/1924
19-Oct-22           Improvements in friction transmission clutches                   GB205680 (A)   25/10/1923
7-Dec-22           Improvements in the construction and mounting of valve
                        stem guides                                                                   GB210235 (A)   31/01/1924
16-Mar-23           Improvements in change speed gear operating mechanism   GB213107 (A)   27/03/1924
16-Mar-23           Improvements in shackles preferably for use with spring
                        forks for cycles and the like                                                   GB207744 (A)   6/12/1923
16-Mar-23           Improvements in filler caps for liquid containers and the like   GB209641 (A)   17/01/1924
16-Mar-23     Improvements in motor cycles                                           GB211023 (A)   14/02/1924
17-Mar-23           Improvements in and relating to the steering columns of
                        motor cycles or like vehicles                                           GB216259 (A)   29/05/1924
17-Mar-23           Improvements in shock absorbing devices                           GB216258 (A)   29/05/1924
17-Mar-23           Improvements in shock absorbing mechanism                   GB209643 (A)   17/01/1924
17-Mar-23           Improvements in actuating mechanism for change speed
                        gears                                                                           GB209336 (A)   10/01/1924
17-Mar-23      Improvements in crankcases for flat twin-cylinder internal
                        combustion engines                                                           GB212425 (A)   13/03/1924
17-Mar-23           Improvements in gear boxes for change speed gear
                        mechanism                                                                   GB211024 (A)   14/02/1924
26-Mar-23           Improvements in or relating to brake mechanism                   GB217994 (A)   26/06/1924
27-Mar-23           Improvements in saddles for use on cycles, motor cycles
                        and the like                                                                   GB205025 (A)   11/10/1923
11-May-23   Improvements relating to the pistons of internal combustion
                        engines and the like                                                           GB215957 (A)   22/05/1924
11-May-23   Improvements in knee grips for use on motor-cycles           GB201117 (A)   26/07/1923
22-May-23   Improvements in fuel tanks for use on motor vehicles           GB202931 (A)   30/08/1923
5-Jun-23           Improvements in sidecars for use with motor cycles           GB217754 (A)   26/06/1924
30-Jan-24           Improvements in the construction and mounting of valve
                        stem guides                                                                   GB229838 (A)   5/03/1925
16-Jun-24           Improvements in oil pumps                                                   GB234299 (A)   28/05/1925
24-Sep-24           Improvements in pistons for fluid pressure engines           GB244829 (A)   24/12/1925
13-Oct-24           Improvements in transmission shock absorbers                   GB242413 (A)   12/11/1925
13-Oct-24           Improvements in chain guards for motor cycles                   GB242054 (A)   5/11/1925
25-Oct-24           Improvements in or relating to mechanical starting devices
                        for internal combustion engines                                           GB244559 (A)   24/12/1925
25-Oct-24           Improvements in internal combustion engines                   GB244558 (A)   24/12/1925
25-Oct-24           Improvements in or relating to motor cycle saddles           GB241714 (A)   29/10/1925
25-Oct-24           Improvements in stationary internal combustion engines   GB240662 (A)   8/10/1925

Online cardan

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Re: S.L. Bailey
« Reply #56 on: 14 Nov 2018 at 05:35 »
Hi Ian,

Yes there is a gaggle of SLB patents.

One thing I've found interesting is that there are quite a number of "Sports Model" patents (several of them filed on the day SLB left for Australia in August 1920). The cush drive in the flywheels of the 1920 race bikes, the box rocker shaft oilers (I note an earlier patent than the one above - that didn't mention wicks - dated 21 Aug 1920), clutch, front disc brake, combined rear brake and cush drive, and so on. Based on the patent record, you'd have to go with "Bailey designed the Sports Model" or at least "most of the innovations on the Sports Model were Bailey designs".

Here's one of the "August 21" patents that didn't make it to the production models. It was was for an aluminium cylinder head, made by inserting a pre-made iron skeleton (for the "skull", valve seats, spark plug boss and optionally the rocker stanchions) into the pattern and casting aluminium fins etc. around it. (I think Doug once told us that this is how DT heads are made, albeit not using aluminium?)

Anyway, this appeared in The Motor Cycle 22 July 1920:
"There were two interesting Douglases entered for the Class C ten miles scratch race [at Brooklands] for motor bicycles up to 500 c.c., both of them had overhead inlet [sic] valves. Of these, Bailey's mount had cast iron cylinder heads, while Thorpe's engine had aluminium cylinder heads."

A cunning plan, but I don't know how many Douglas racers went on to use aluminium heads?

Cheers

Leon
« Last Edit: 14 Nov 2018 at 05:43 by cardan »

 

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