th en
p -In sig -sp eed be
th llo ll, ilt ith elicacy ,
sc rip tio becau tia ry
A tre r
10 tru tio rte sira ry
u tio slow tin feeble-
e lin rly tio ess effo rt.
SPEED-INDICATOR.
T tiv -
B Nikola Tesla, iti- tiv eed rth ss
z ite lth tru ,
Y hen. tru rib d
50 tin tisfa rily p£ior. --j. 1,209,359, ecern- g
’ 19, 1916, rib isc sity liq id
o rin tru ecreases its rise s,
40 sio isc sity aseo ccessfu -
p tiliz -tra tru tio ,is -
m issio fro seco ite ^
a arid lly tra rly tio n
., ASSIGNOR WALTHAM WATCH COMPANY, OR
WALTHAM, MASSACHUSETTS, CORPORATION MASSACHUSETTS.
Application filed December 18,1918. . itio rio re
48 ffo rte lin rly ses, -
p rtio tio of; ses disclo re,^S ecific a
m rin tio fin sig n
p iriý stru tio ile ., ilt -sp tio y
5 rta stru tio . som
sp eed stances,, sira to
to eed ittin a
15 ith concom i-
sio effect eed tro sio lo> v-range te
a ste tic lic eed -
c tru tio ssa tic ecrease siz lessen -
m cau ses tic (su sitiv as
20 rin -fric tio rin -in litie tio tru le,
lik lig ffe lish y
to tia lly ffe -tr ittin e-,
c tra itio tem riv ele-
p ric ity tic ita liq er-
25 flu tru tly itio y
d tiv sib rite- lic tio rre to
c tio lin tio lity eflectio s,
s lic ity eco tte ti-
b ility ility lly e
30 tta isc sity liq ria -
iZes also tio t
a lia ita ll’ ssa r,
as il, elo cities, its Hbut liq tiv ly
in scale, sity r
35 ffe lity
p ith ith lf-c tio tem -
r.
NIKOLA TESLA, 03? NEW YORK, Y.UNITED STATES PATENT OFFICE. In. 137,691.
1 Specification Letters Patent. lic tio d
q ire tru riv ith fro tin clo sely -
55
60
65
70
76
80
85
90
95
100
.
. Serial No'
