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Патент USA US2131269

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Sept. 27, 1938.
F. c. BYRAM
2,131,269 ’
SWITCH STRUCTURE
Filed NOV. 11, 1936
13
w
" FREDERICK C. BYRAM
Patented Sept._ 27, 1938 _
' 2,131,269
_
UNITED STATES FATENT OFFICE
2,131,269
SWITCH. STRUCTURE
Frederick C. Byram, Spring?eld, Ohio, assignor
to Penberthy llniector Company, Detroit, Mich,
a corporation of Delaware
'
Application November 11, 1936, Serial No. 110,229
1 Claim.
(01. 200-67)
My invention relates to switch structures
adapted particularly for snap closing or opening
of electrical circuits.
An important object of the invention is to pro
vide an improved structure comprising a switch
control element either manually or automatically
operable, a switch actuating element, and a spring
toggle link between the elements, with the opera
tion such that during a period of movement of
the control element the spring toggle is loaded for
subsequent quick or snap movement thereby of
the switch actuating element for operation of the
switch.
1
A further important object of the invention is
15 to provide a simpli?ed structure comprising a
swinging control element and a swinging switch
actuating element, with a common pivot support
for these elements and with a spring toggle link
interposed between the elements for snap action
20 of the switch actuating element after a period of
movement of the control element.
~
The invention also incorporates other features
of structure, arrangement and operation.
A structure embodying the various features of
25 the invention is shown on the accompanying
drawing, in which drawing:
Figure 1 is a side elevation;
Figure 2 is an end elevation;
Figure 3 is a section on plane III~III of Figure
30 2, with the control element in its upper position;
Figure 4 is a section similar to Figure 3, with
the control element in its lower position;
Figure 5 is a section similar to Figure 3, with
the control element in neutral position; and
35
Figure 6 is a side elevation like Figure 1 but
with the switch bulb and supporting bracket re
moved.
In the structure shown, a supporting base plate
ll} of sheet metal has its upper portion bent for
wardly to form a top wall I i whose forward por
tion is bent downwardly to form a wall portion l2
parallel with the base plate. Extending trans
versely through the base plate and the front wall
I2 is a pivot pin l3, and between the base plate
and front wall the pin journals a hub M secured
to and supporting the control element l5 shown
in the form of a lever formed from a piece of
sheet metal. At its outer end the lever has the
laterally deflected ?ange It by which it may be
manipulated or actuated. As shown, the body of
the lever is diamond-shaped, its upper edges on
opposite sides of the pivot abutting with the top
wall ll so that the range of swing of the lever is
limited.
The switch actuating element I1 comprises in
ner and outer parallel arms l8 and I9 connected
together at their lower ends by a yoke 20, and the
actuating element may, as shown, be formed up
from a single piece of sheet metal. At their upper
ends the arms receive the pivot pin 13 so that the 5
element ll is supported for swinging movement.
The inner arm is adjacent to the base plate l0 and
the outer arm is outside of the wall l2, and a
washer 2! may be inserted between the inner arm
and the base plate to reduce friction.
10
The lever I5 at the lower point of its body has
an ear 22 extending therefrom which receives the
bifurcated head 23 of the toggle link 24 for piv
otal connection therewith by means of a pin. 25.
The body of the link is cylindrical and has the 15
longitudinal slot 26 which receives the bar or pin
El secured to and extending between the outer
ends of the arms 58 and IQ of the actuating ele
ment ll. A compression spring 28 encircles the
link body with one end abutting the bar 21 and 20
the other end abutting the shoulder 29 at the base
of the bifurcated head 23 of the link.
1
The inner arm it of the actuating element I1
has an opening 30 therethroughinto which pro
jects a stop tongue 3! which may be formed by 25
deflecting forwardly a portion of the base plate
it. The engagement of the sides of the opening
30 with the stop tongue limits the range of swing
of the actuating element l1.
'
The extension 22 on the lever l5 and the
toggle link and spring constitute a spring toggle
connection between the lever and the switch ac
tuating element for effecting quick or snap ac
tion of the actuating element when the control
element or lever 15 is operated. Referring to 35
Figures 1 and 3, where the lever I5 is in its upper
position, the axis of the pivot pin 25 is to the
right of the dead or neutral line between the pivot
pin it and the bar 21, and the actuating element
i‘! will be held with the right side of the opening 40
36 against the stop tongue 31. If the lever i5
is now swung downwardly, the actuating element
It will not be moved until the pivot connection
25 between the lever and the toggle link has
moved to the left beyond the dead or neutral 45
line between the pivot pin 13 and the bar 21.
During downward swing of the lever the spring
is compressed and loaded, and then, after pas
sage of the pivot 125 beyond the neutral line, the
force of the loaded spring will be expended in 50
quickly moving or snapping the actuating ele
ment ll to the right, and in quickly swinging the
lever downwardly through the remainder of its
downward movement, the actuating element be
ing stopped by the engagement of the left side 55
2
2,131,269
of its opening 30 with the stop tongue 3!? , and the
lever beingstopped byther engagement of the inner
end thereof with the top wall I I of the supporting
base. Figure 5 shows the movement of the tog
gle element through the neutral line, and Figure
4 shows the ?nal position thereof, with the
control lever down.
If the lever is now swung
upwardly, the actuating element remains at rest
until the toggle link pivot 25 passes the neutral
10 line, whereafter the actuating element I‘! will be
quickly moved or snapped to the left, with the
right side of its opening 30 against the stop
tongue 3|, and the lever IE will be quickly re
turned to its full upper position where it will
15 be stopped by its engagement with the top wall
H. The initial movement of the control lever
in either direction thus loads the toggle spring,
and thereafter the actuating element and the
control element are quickly snapped to their re
spective limits of movement.
I have shown the actuating element I‘! ar
ranged to support and actuate a mercury tube
switch 34. To support the mercury tube, a por
tion of the outer arm i9 of the actuating element
25 may be bent forwardly to provide a shelf 32 for
supporting a spring clampv 33 for the tube 34.
As shown on Figure 1, the tube or bulb 34 may
have circuit terminals A and B for connection
by the mercury C when the control lever I5 is
30 in its upper position for closure of the circuit of
an operating element such as an electric motor.
When the lever is swung downwardly and the
toggle connection swings the actuating element
l1 into its other position, the mercury tube is
Ca: in canted for disconnection of the mercury from
the contacts and reopening of the circuit. The
mercury bulb may have terminals D and E at its
other end for closure of another circuit when the
bulb is tilted, or other terminal arrangements
40 may be provided for any desired control of one
or a number of circuits. The quick or snap
action of the element H and the consequent rapid
tilting of the switch bulb will assure quick open
45
ing, and closing of the‘circuit to be controlled.
The switch structure shown comprises simple
parts, mostly of sheet metal. which can be eco
nomically made and assembled. The provision
of a common pivot support for the control ele
ment [5 and the actuating element I‘! materially
simpli?es the construction, and with the toggle
arrangement shown there is an ample side thrust
component against the actuating element to hold
it in snapped position against accidental dis
placement.
The ?ange IS on the control lever l 5 facilitates
manual actuation of the lever, and the flange
may be slotted as indicated at 36 for engagement
with suitable abutments on shift rods or wires 10
(not shown) for transmission to the lever of the
movement of control elements such as floats,'and
for resultant control by the switch structure of
electrical circuits of driving motors of devices
Whose operation is to be regulated.
I have shown practical and ef?cient embodi
ments of the various features of my invention,
but I do not desire to be limited to the exact con
struction, arrangement and operation shown and
described, as changes and modi?cations may be 9,0
made without departing from the scope of the
invention.
I claim as my invention:
In a switch structure of the class described, a
supporting frame comprising a back wall, a top
wall, and a front wall depending from the top
wall, a pin supported by said back wall and front
wall, a hub journalled on said pin between said
front and back walls, an actuating lever carried
by said hub to swing on said pin, a 'U-shaped 30
switch actuating frame having its rear leg receiv
ing said pin between said hub and said back wall
and having its front leg receiving said pin in
front of the front wall, said front leg having a
portion de?ected laterally thereupon to form a 35
support for a circuit controlling element, an
abutment pin connecting said switch actuating
frame legs near the yoke thereof, a toggle link '
structure comprising a link having a head pivoted
to said lever and having a slot in its other end .
receiving said abutment pin, a spring encircling
said link and abutting said abutment pin and
said head, whereby swing of said lever will result
in snap swing of said switch actuating frame,
and circuit controlling means carried by said 46
switch actuating frame.
FREDERICK vC. BYRAM.
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