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Патент USA US2403498

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July 9, 1946I
G. E. BRITTINGHAM
CUT-OUT DEVICE FOR TELEPHONE TRANSMITTERS
’
Filed Juli/‘25, 1944
“2,403,498
2,403,498
Patented July 9, 1946
UNITED STATES PATENT OFFICE
2,403,498
CUTOUT DEVICE FOR TELEPHONE
TRANSMITTERS
Gerald E. Erittingham, Ontario, Oreg.
Appiication July 25, 1944, Serial No. 546,480
3 Claims. (01. 179-158)
1
2
This invention relates to an improved cut-out
device for telephone transmitters and has for its
angular switch element H, with its hypotenuse
primary object to provide simple and effective
side disposed inwardly and its exposed corner l8
means whereby a subscriber using the telephone
may temporarily out out or disconnect the tele
phone transmitter from its circuit when he de
sires to prevent the party with whom he has the
telephone connection from hearing noises or
preferably rounded.
conversation in the room or other place while the
subscriber is not talking into the transmitter.
It is also an important object of the invention
to provide a simple, inexpensive, and reliable de
vice for the above purpose which can be readily
applied to the telephone transmitter, and Which
is especially adapted to be applied to the French
or hand type of telephone instrument, so that
when the instrument is laid down on either side
on a table or other surface the transmitter cir
IE on which is hinged the smaller end of the tri
At the end of the hypotenuse side of the switch
element is a dielectric or insulated cross head
19, on the outer side of which is secured a contact
bridging member 20 by suitable means such as
screws 2!. The switch element ll as a whole
, may be made of dielectric material including the
crosshead l9 or of conductive material with suit
able provision for insulating the bridging member
from the switch element and from the transmit
ter housing.
In Figure 2, the crosshead I9 is shown posi
tioned within the transmitter housing beyond the
outer end of the slot l5 and toward the dia
phragm end of the housing, in conformance with
cuit will thereby be cut out.
a
the pivoting of the switch element at the inner
With the above and other objects in view, my 20 end of the slot. However, an opposite arrange
invention consists in the novel features of con
ment can obviously be made in which the switch
struction, combination and arrangement of parts
element is pivoted at the outer end of the slot [5
hereinafter more fully described and shown in the
and its crosshead’s bridging element engages ap
accompanying drawing, wherein a preferred em
propriately positioned contacts.
bodiment of the invention is shown only for il 25
The contacts 22 and 23, and 22' and 23' in
lustration.
the illustrated arrangement are suitably mounted
In the drawing:
in the inner side of the transmitter housing wall,
Figure 1 is a fragmentary side elevation of a
on opposite sides of the medium plane of swing
French or hand type of telephone instrument,
of the switch element, and are preferably at
showing the transmitter portion, with the cut 30 least partly embedded or countersunk in the wall,
in a position to be simultaneously and positively
out device applied thereto;
Figure 2 is an enlarged fragmentary sectional
engaged by the bridging element 20 of the corre
view taken along the line 2—2 of Figure 1 and
sponding switch element as it is moved inwardly
through the slot I5 against the outwardly press
showing details of the switch;
.
Figure 3 is a plan view of the transmitter, with 35 ing tension of a suitable spring, such as the coil
diaphragm removed, and partly in section to show
spring 24 backed up by a suitable abutment 25
the arrangement of the switches; and
provided in the transmitter housing, and which
Figure 4 is an enlarged perspective of one of
normally keeps the switch element pressed out
the switch arms and its contact bridge.
wardly as indicated in the upper part of Figure 3,
Referring to the drawing, the French or hand 4-0 in which position the bridging member 21] is in
type telephone instrument 5 includes the hand
engagement with the contacts 22' and 23’ and the
piece 5 terminating at one end in the generally
normal transmitter circuit obtains.
cylindrical transmitter housing 1 which is dis
One of the contacts 22 has the transmitter
posed at a convenient angle to the handpiece 6,
circuit wire I3 connected directly to it, as shown
and includes the removable annulus 8 which when 45 in Figure 3, while the remaining transmitter cir
in place retains the diaphragm 9 relative to the
cuit Wire I2 is connected to one side of the mag
magnet to, whose coil H has one side connected
net coil II and the other side of the coil is con
with the transmitter circuit wire I2 and the other
nected by the wire 26 directly to the contact 23’.
side with the transmitter circuit wire i3, both
The
contacts 22' and 23 are connected together
wires passing together through a grommet 50
by a wire 21. As a result, whenever the telephone
equipped opening M in the bottom of the trans
instrument is laid down on either side on a sup
mitter housing, as shown.
porting surface as shown in Figure 3, the corre
Each of two diametrically opposite sides of the
sponding switch element will be pushed inwardly
wall of the transmitter housing is formed with
a slot [5, in one end of which is ?xed a pivot pin 55 and open the transmitter circuit.
2,403,498
3
7
Having thus described my invention, what I
claim is:
1. In a telephone instrument having a trans
mitter of a type adapted to be temporarily laid
on a supporting surface when in use, a transmit
4
wardly to disengage said bridging element from
the contacts and open the transmitter circuit until
the transmitter is raised from the supporting
surface.
2. A telephone instrument, as in claim 1, where
in said switch element comprises a block having
at one end a crosshead carrying said bridging
rest on said surface when so laid thereon, a trans
member with the opposite end of the block piv
mitter circuit within said housing, and a switch
oted in said opening.
comprising a pair of switch contacts mounted
3. A telephone instrument as, in claim 1, where
within the housing and connected in said circuit 10
in said switch element comprises a block and said
and an outwardly projecting spring pressed switch
opening comprises a slot conformably passing
element having a bridging member, normally
the block with a pivot pin traversing one end of
electrically bridging, said contacts, said switch
ter housing either side of which is adapted to
element being pivotally mounted to project
through an opening formed in one side of said
housing sufficiently to engage said supporting
surface when the transmitter is laid on its side
thereon and be thereby pressed far enough in
the slot and pivotally supporting the correspond
ing end of the block, another portion of the block
having a crosshead within the housing and carry
ing said bridging member.
GERALD E. BRITTINGHAM.
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