Description of a Carriage-Wheel Guard. 328 
make all fast. The section, fig. 3, shows the cross bl, and box 
BB, separated, to explain'the mamner of fitting them together, 
the inside face of the cross having projections ee, which enter 
the end of the box, and keep the pivot in its true centre: thus 
the bolts have only to hold the gudgeons fast on the end of the 
box, the principal strain being taken off by this manner of fitting 
the cross into the box. 
When the gudgeon of a wheel, fitted on this plan, becomes 
wort out, so as to require a new one, it can be removed, by 
‘taking off the four nuts, and a new one applied. 
The cross and gudgeon, being of small dimensions, admit of 
its cylindrical part C being very conveniently turned in the 
lathe. 
LXX. Description of a Carriage-Wheel Guard, by which 
the Wheel is retained safe upon the Axis in case of the 
Linch-pin coming out. By Mr.Joun Papgury, of Speen- 
hamland*. 
Sir, — Frou a conviction of the good wishes which the Society, 
for which you act as Secretary, ever feel for ingenuity, in its. va~- 
rious branches, I am induced to lay before you a plan of my in- 
vention, for the more effectually giving safety to the wheels of 
carriages, to prevent their breaking, or to avoid any mischief 
from loss of that very considerable support, the Linch-pin, on 
the dependence of which the lives and limbs of so many are con- 
tinually exposed. 
The plan I now offer for the investigation of the Society, is 
calculated to obviate the danger which may arise from such an 
accident ; the great repute it has obtained, and the almost ge- ~ 
neral application of it by the coach proprietors of the Bath and 
other roads, together with the prevention of many accidents 
since its adoption, will, I flatter myself, plead a sufficient apology 
for my offering it to your notice. 
I am, sir, ’ 
Your obedient humble servant, 
Speenhamland, Oct. 1812. JoHN PADBURY. 
To C. Taylor, M.D. Sec. 
The following gentlemen, residing in this neighbourhood, have 
inspected the apparatus, and much approve of it. They have 
* From Transactions of the Society for the Encouragement of Arts, Sc. 
for 1813.-The silver medal of the Society was voted to Mr Padbury for 
this communication. 
X 2 done 
