GATE. 
’ gate, which is lefs expeuiee, but by no means {o good as 
when the ftrap-extends to the whole length of the gate, as 
Helctibed: cose Poa thimble is twilted 1-4th of an inch 
bearing towar e hanging-poft. Fig. 16..is the lower 
aig of a a gate oo oe to the pitas thimble 
s 18 inch is to’ 3 inches, in regard to th 
above fuch proportion, the greater muft become the er ‘ti 
of the gate’s fall, or tendency towards the line of re 
until its one. is arrefted by the faftening-poit 1-16th part 
of the circle, or 22° 30! fhort of the line of reft. Th 
lower thimble is let into the gate by a ferew of oud fub- 
ftance throughout its length, or not tapered, in order that 
the adjuftment of the thimbles, as to the velocity of the 
gate’s fall, may be regulated to fo great a nicety as half a 
turn of the ferew: and the thimble may either be let into 
c Re aced alfo by the lo ower 
thimble, which being Seed 1-4t th of an inch out of the 
middle of the heel af th 
this abet in effet, aa ier of an ce to thee 
length of the lower thimble, fo that, by a plumb-lite, it will 
be found (when the gate is hung upright, as it always ought 
to be) that the actual extra length of the lower thimble, 
or horizontal eae ® oe two centres from each other, 
wi : - ++ oe 17 hook. 
Pig. s the i book, y-ho and 
is Fars an i aah longer from He centre to the fhoulder as 
the upper hook, in order. to oie the thimbles; the atual 
to ae pr ae ae hoo n be more ie n I- 16th 
art ‘of an inch fmaller than ap ae for as the whole 
fofs j in eee a ie need not be fo much as 1-8th of an 
inch, or not m erhaps than 1-12th (which exadtly ba- 
nes what is ede in the thimbles), the extra length of 
the lower thimble before it is fixed to the gate, and that of 
cifely to accord with the dimenfions expreifed in the plate, - 
fuppefing. the diftance ee the two hinges to be 40 inches.”’ 
it is added, that “ the diameter of the hooks fhould 
be about 13-16ths of an inch, and the perforated parts of 
the thimbles, when made to fit fuch hooks, will be about 
14-16ths, that is, 7-8ths of an inch diameter: for pivots of 
this fize, ce above eee are fuited, as to the Manta 
of a gate’s fall; andthe thimbles fhould be made of ro 
ed iron, that the fri€tion may be reduced by a finales of 
to be 
the ".urfac affected thereby ; as is 
Vince’s experiments “ On the Motion of Bei afotted 
by FriGiion.”? Vel. 
L) ¥XV. sap ee TranfaGtions of 
And when old iron-work 
ufe of, wherein a larger furface ‘is "expoted to fric- 
tion, 1-8th, or 1-4th of an inch, as may be fi ufficient, adde 
to-the eon extra length of a lower thimble, will be 
2 
the Royal Society of London 
is made 
xtra ~ 
the readieft means of -counteradting the extra friction.’”” 
But, “if the heel of a 
s, muft be fupplied by adding “~ aie length of 
the lower thimble. 
«“ A complete gate for Opening one way, and conftructed 
in fuch a manner, that it fhall not fink at a head, as ordi- 
nary gates are apt to do, is fhewn at fig. 6 e bars are 
let into the middle parts of the head and heel, and the lac- 
om ut 
‘6 the wa he j in ais and finifhing a ee may Te all allowed 
for or not, as the gate is defired to be a little more or lefs 
ftrong.”? But, “ when the timber is good, it is reduced fo 
little’ by being aaa and finifhed fae a gate, that no 
allowance need be e for the wafte ; at all events, if 
the fawyer attends: eS the dimenfions recommended, the gate 
will be quite ftrong enough for its fize.”” 
Greateft 
Parts of Gate. Length. Thickne fs, Tapered to. 
Feet. Tn, aig by In. Tn. by In. 
Heel . - 4 4° 44-35 
Head - - 4 4 24—24 
Ral - - 9 9 34-33 23-25 
5 Bars - "= 9 9  35-~1 2 ae 
Diagonal lang - 9g 6 3i—15 2i—I 
Larger apa ineing 2 8. 34—14 
Smaller 2 8 3.—8t 
which will be found to form a well ‘proportioned gate, the 
whole of the ee parts at the head prefenting to the eye 
2% inches, a d feven out of the eight parts at the heel, 
iron fae of equal length to the gate, 
age) attached ing a part of the upper thimble 
firit inftance, where it holds the heel of the gate by 
in the i 
the fhoulder of the thimble ; it is afterwards {crewed to the 
rail at proper diftances; and laftly, fecures the whole work 
together, by a aaa rounded and. let into the front of 
s head, as feen above. er iron ftrap is about an 
i i nce, for one half of 
ee 
or 
chamfered off, and the whole appears to be gradually taper- 
ed from the hel to the head of the gate, widening a little 
round the hole which is left for the upright part of the 
latch adjoming to the handle. By this arrangement, the 
gate is in fact fufpended by the iron ftrap and rail, inftead 
of the heel, an affitts ae y in preventing any ftrain 
upon the morti - s by the gate’s own he t, or otherwife.’ 
The writer fays, he ‘ oe imagine f 
durable cori oe: and that it ee particularly well 
calculated for road-gatés. As in ace toa ficld, through 
which there is no common road, it is immaterial what fort 
of gates may be ufed, fo a a be made fecure againft 
cattle.” ; 
In 
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