Electric Clock Page: 3 of 7
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UNITED STATES PATENT OFFICE.
HENRY IVERSEN, OF CORSICANA, TEXAS.
ELECTRIC CLOCK.No. 839,765.
Specification of Letters Patent.
Application filed September 16, 1905. Serial No. 278,741.To all whom it may contcern7:
Be it known that I, HENRY IvESEN, a
citizen of the United States, residing at Cor-
sicana, in the county of Navarro and State
5 of Texas, have invented new and useful Im-
provements in Clocks, of which the following
is a specification.
This invention relates to a novel clock sys-
tem in which a secondary clock or a series of
io secondary clocks are electrically operated
from a master-clock.
The invention has to do more particularly
with the construction of the secondary clock
and with the circuit-breaker operated from
15 the master-clock.
It is the object of the invention to provide a
system whereby a series of clocks may be lo-
cated at any number of different localities in
2 city or in different rooms of a building and
20 be operated from a master-clock, so that all
the secondary clocks will be caused to keep
uniform time with the master - clock.' By
such a system it is only necessary to regulate
the master-clock to insure that all of the sec-
25 ondary cocks keep uniform time therewith.
In order that the invention may be clearly
understood, I have illustrated the same in
the accompanying drawings, in which-
Figure 1 is a front view, partly in section
30 and partly in elevation, of a-secondary clock.
Fig. 2 is a front view of the master-clock.
Fig. 3 is a side elevation of the secondary
clock. Fig. 4 is a detail view illustrating one
position of the operating and locking-arms,
35 the locking-arm being in an inoperative po-
sition. Fig. 5 is a similar view with the op-
erating-arm in an inoperative position. Fig.
6 is a detail view of one member of a circuit-
breaker, and Fig. 7 is a diagrammatic per-
40 spective view showing the circuit-breaker of
the master-clock electrically connected with
the electromagnets of a secondary clock, to-
gether with the mechanism operated by said
electromagnets, and a circuit make and
45 break device for setting the hands of the sec-
ondary clock independently of the movement
of the master-clock.
Referring now to the drawings, 1 indicates
the master-clock, which comprises the ordi-
50 nary clockwork mechanism with arbors 2 3
for the minute and hour hands, respectively.
On the shaft 4 of the escapement-wheel 5 of
this clock is secured to turn with said shaft
a rotary make-and-break device 6, having an
5 outer circumferential layer 7 of hard rubberPatented Dec. 25, 1906.
or other insulating material, in which is em-
bedded at three or more equidistant points
around the circumference contact-pieces 8,
of suitable metal, preferably platinum.
9 10 indicate two similar contact-arms 6o
which are secured upon insulating-blocks 11
12, said insulating-blocks being independ-
ently and loosely mounted upon a journal
13, carried by a bracket-frame 14, secured to
the frame 15 of the master-clock. The ends 63
of the contact-arms 9 10 rest upon a rotary
contact-maker 6 and are adapted to make
contact at their outer ends with the contact-
pieces 8 as the rotary contact-maker is re-
volved by the clockwork mechanism of the 70
master-clock.
16 indicates a secondary clock, in the
frame 17 of which the mechanism of said
clock is mounted. Said mechanism includes
two electromagnets 18 and 19, respectively. 75
From the rear end of the contact-arm 9 a
wire 20 passes to the electromagnet 18.
From the rear end of the contact-arm 10 a
wire. 21 passes to and is connected with one
pole of an electric battery 22. A wire 23 8o
connects the other pole of said battery with
the electromagnet 19.
24 indicates an armature which is substan-
tially segment-shaped, as shown, and is piv-
otally supported by bearings 25 at opposite 85
ends in sides of the frame 17. The cores 26
of the electromagnets are curved to conform
to rhe curved side of the armature, and when
said electromagnets are energized the arma-
ture will be caused to rotate on its bearings 90
25, or, in other words, sweep across the upper
surfaces of the cores 26. The purpose of this
construction will be presently explained.
Secured centrally to the upper side of the ar-
mature 24 and extending at right angles from 95
opposite sides thereof is a lever-arm 27, loosely
secured or swiveled, toward the outer end of
which is a depending operating-arm 28. On
the outer end of said lever-arm is mounted an
adjustable weight 29. Secured toward the up- 100
per end of the operating-arm 28 is a bracket-
.rm 30, provided with an offset portion hav-
ing an elongated slot 31, which works over
the outer end of the lever-arm 27. The pur-
oose of the bracket-arm 30 is to insure uni- 105
formity of movement to the operating-arm
28. In the lower end of the operating-arm 28
is secured a pin 32, having an upper inclined
side, as indicated at 33 in Fig. 5. This pin is
adapted to engage in any one of a circular o
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Iversen, Henry. Electric Clock, patent, December 25, 1906; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth512083/m1/3/: accessed July 18, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.