Visual Automatic-Setback Annunicator. Page: 2 of 3
[1], 2 p. : ill. ; 23 cm.View a full description of this patent.
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UNITED STATES PATENT OFFICE.
LEE STEPHENS, OF FORT WORTH, TEXAS, ASSIGNOR OF ONE-HALF TO JOHN H. GREER,
OF FORT WORTH, TEXAS.
VISUAL AUTOMATIC-SETBACK ANNUNCIATOR.1,234,504.
Specification of Letters Patent. Patented July 24, 1917.
Application filed August 10, 1914. Serial No. 856,132.To all whom it may concern:
Be it known that I, LEE STEPHENS, a
citizen of the United States, residing at
Fort Worth, in the county of Tarrant and
5 State of Texas, have invented certain new
and useful Improvements in Visual Auto-
matic-Setback Annunciators, of which the
following is a specification.
My invention relates to automatic set back
10 annunciators, and more particularly to vis-
ual annunciators, and the object is to pro-
vide a simple operating mechanism which
will act with certainty and precision and
which is provided with indicators or needles
15 which will be positively positioned and
rigidly held in position for indicating pur-
poses. Other objects and advantages will
be fully explained in the following descrip-
tion and the invention will be more par-
20 ticularly pointed out in the claims.
Reference is had to the accompanying
drawings which form a part of this appli-
cation.
Figure 1 is a diagrammatic perspective
25 view of the back of a board, showing the
actuating mechanism. Fig. 2 is a detail
view of one of the needles or indicators,
showing the position of the needle relative
to the numbers on the board. Fig. 3 is a
30 vertical section of the board, taken substan-
tially on the line x-x of Fig. 1 and show-
ing the actuating mechanism. Fig. 4 is a
detail view of a pair of solenoids, which may
be used instead of the magnets shown in
35 the previous views.
Similar characters of reference are used
to indicate the same parts throughout the
several views.
The mechanism is mounted on a board 1
40 which may be mounted at any convenient
place. A magnet 2 is mounted on the board
1 by means of a block 3 to which the magnet
is attached. A rocker shaft 4 is mounted
on the board 1 by means of brackets 5. The
45 shaft 4 carries needles or locking devices 6
and 7 which may be rigidly and adjustably
attached to the shaft 4 by set screws 7. The
indicator 8 is mounted on a pivot post 9
which is journaled in the board 1. The
50 outer end 10 of the post or shaft 9 is en-
larged and a lever 11 is adjustable and
rigidly connected to the shaft 9 by means
of running the lever through the post and
holding the same in fixed position by a set
55 screw 12. The lever 11 carries a keeper orarmature 13 suspended between two mag-
nets 14 and 15. The magnets 14 and 15 are
mounted on the board 1 by means of blocks
16 which are attached to the board 1. The
magnets are attached to the blocks 14 and 60
15 by making the cores 17 of the magnets
long enough to project through the magnets
and into the blocks 14 and 15 and then se-
curing the blocks to the board by set screws
18. The lever 11 is thus pivotally mounted 65
with the keeper 13 suspended between the
magnets. The lever 11 is provided with a
counter-weight 19 which may be adjusted
on the lever until it is properly balanced.
The lever N projects up between the needles 70
6 and 7 which are used for locking the lever
in position to hold the indicator 8 on the
desired number. The needles 6 and 7 are
rigid on the shaft 4 and the indicator 8 and
the lever 11 are rigid with the shaft 10 75
and 9.
The mechanism above described is oper-
ated by a suitable battery 20. A wire 21
connects the negative pole of the battery 20
with the magnet 2 and a wire 22 connects 80
the magnet 2 with a series of push buttons
23 and 24. The positive pole of the battery
20 is connected to the terminals of the mag-
nets 14 and 15 by a wire 32. Each push
button is connected to one of the mag- 85
nets,-push button 23 being connected to
magnet 15 by a wire 25 and push button 24
being connected to magnet 14 by wire 26.
In operation the circuit is closed by a push
button. It is necessary that the shaft 4 be 90
rocked before the lever 11 is moved. For
this reason the armature 27 which is carried
by the lever 28 is placed closer to the core
of magnet 2 than the armature 13 is to the
cores 17. The lever 28 is rigid with shaft 95
4. A push on button 23 will close a circuit.
The magnets 2 and 15 will be energized,
the magnet 2 being energized first. The
shaft 4 will rock and lift the needles 6 and 7
out of the path of the lever 11 and the lever 100
11 will be moved by the magnet 15 and pass
below and outside of the needle 6. In-
stantly when the push button 23 is released,
the needle 6 will drop to normal position
and thus lock the lever 11 outside of the 105
needle 6. The lever 11 will thus hold the
indicator 8 pointing to the desired number
on the board. The indicator will continue
to point toward the number until the next
push button is actuated, or the needles 6 no
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Stephens, Lee. Visual Automatic-Setback Annunicator., patent, July 24, 1917; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth853973/m1/2/: accessed July 2, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu.; crediting UNT Libraries Government Documents Department.