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Патент USA US2128726

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Aug. 30, 1938.
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'
E. CLARK
2,128,726
VOLTAGE~SELECTOR AND WIRING TERMINAL, PARTICULARLY FOR USE THEREWITH
.Filed Feb. 6, 1935
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INVENTOR
Ernest Clark
"A. ORNEY
2,128,726
Patented Aug. 30, 1938
UNITED STATES
2,128,726
VOLTAGE SELECTOR AND WIRING TERRIE
NAL, PARTICULARLY FOR USE» THERE
WITH
Ernest Clark, Beeston, England, assignor to
United-Carr Fastener Corporation, Cambridge,
Mass, a corporation of Massachusetts
Application February 6, 1935, Serial No. 5,249
5 Claims. (Cl. 173—328)
‘The present invention relates to switches and
more particularly to voltage selector switches,
and aims generally to improve existing switches
for that purpose.
5
One of the principal objects and advantages
of "the invention is to improve and simplify the
construction of voltage selector switches to the
end that a simple and inexpensive switch may be
made to permit one or more electrically con
10‘ trolled devices to be selectively connected in cir
cuit with different lines of varying voltages.
Other aims and advantages will be apparent
from a consideration of the followingdetailed de
7 scription of one preferred embodiment of the in
which is illustrated‘in the accompanying
115 Y vention
drawing.
In the drawing
Fig. 1 is a front elevation of the improved
switch;
20
.
.
Fig; 2 is a similar view with the cover panel
removed;
Fig. 3 is a rear elevation of the switch;
Fig. 4 is an enlarged longitudinal sectional
view taken on the line 4--4 of Fig. 1; and
Fig. 5 is a detail perspective view of one of the
25
terminals according to one embodiment of the
invention.
The particular embodiment of the invention il
lustrated in the drawing may advantageously
30 comprise a base i of suitable insulating material,
such as a ?brous or phenolic condensation insu
lating material to which is connected a plurality
of lead-in terminals 2, each of which may carry
a particular voltage different from the other. In
35 the illustrated embodiment, three lead-in termi
nals 2 are shown, and by way of example they
may carry voltages of 210, 230 and 250 respective
ly. The base I may also be provided with a plu
rality of take-off terminals 3, two of which are
40 shown in the illustrated embodiment although it
is apparent that one or more of these terminals
may be used, each of the terminals 3 to be con
nected to an electrically operated device.
The base i may advantageously be mounted
45 upon a panel 4 of suitable non-conducting mate
rial, and is advantageously spaced therefrom by
means of insulating spaces 5 (see Fig. 4).
On
the side of the panel 4, opposite the base I there
is a conductor strip or bus bar 6 conveniently
50 formed of a thin ribbon of conducting material
and electrically connected to the take-off termi
nals 3 in any suitable manner, but advantageous
ly by means of fastening members 1 acting to
secure the panel 4, contact strip 6, base i and
terminals 3 in assembled relation. Conveniently
this fastening member may be in the form of a
tubular fastening, such as a rivet, the ends of
which are adapted to be upset over the contact
strip 6 and terminal 3, and the spacers 5 may sur
round the rivet. Thus the base i with its asso
ciated parts and the panel 4 and the parts carried
thereby are secured together in strong assembled
relation.
The strip or bus bar 6 is preferably formed
with a plurality of switch plug receiving aper 10
tures 3, one in registry with each of the lead-in
terminals 2. Each of the terminals 2 is provided
with a plug receiving socket 9 adapted to receive
and hold the end of a removable switch plug ill,
which preferably is formed with a conducting
stem l i and a non-conducting handle portion l2.
In the form of invention illustrated in the
drawing, the stem l l of the switch plug is thread
ed to be screwed into a threaded opening in the
plug receiving socket 9 so as to securely hold the
plug in place. However, my invention is not to
be restricted to this particular form of plug as
other forms of a plug or jack engaging a resilient
socket 9 may be used satisfactorily.
As will be apparent when the plug H1 is insert 25
ed in any one of the openings 9, electrical connec
tion is made between the registering lead-in ter
minal 2 and the take-off terminal 3 through the
conducting stem l I of the plug and the conductor
strip 6. In this manner the take-oil terminals
may be connected in circuit with the lead-in ter
minal carrying the desired voltage. Advanta
geously the panel member may be covered by a
cover panel l3 provided with a plurality of open
ings it in registry with the opening 9, and the 35
openings it may be sufficiently large to receive
the shouldered stem ll of the‘ plug it so that
good electrical contact may be made between the
plug and conducting strip 6.
Either or both of the terminals 2 or 3 may con
40
veniently be made in the form of wiring tabs as
shown in Fig. 5, in which case they may be pref
erably stamped from a single piece of metal to
provide a body 15 centrally apertured as at it
having laterally extending wings ll formed with 45
prongs l8 adapted to be bent into clenching en
gagement with the base or other support. An
extension l9 apertured as at 20 provides a suit
able means to which the conductor may be se
50
cured as by soldering.
It will be understood that the invention is not
to be restricted to the form and construction
shown and described above which is intended for
illustrative purposes only, but that the invention ‘
may be embodied in other forms and arrange
2
2,128,726
ments within the scope of the appended claims.
Also, the invention is usable for switches having
one or more lead-in terminals and one or more
take-off terminals.
I claim:
1. A voltage selector switch comprising a rela
tively thin base of non-conducting material, a
thin insulating panel superposed upon said base,
a plurality of lead-in terminals carried by said
base having a portion disposed between said base
and said panel, at least one take-01f terminal
carried by said base, a conducting strip disposed
on the other side of said panel from said base
and fastening means for connecting said base,
15 strip and panel together, means connecting said
strip and take-off terminal in electrical contact
and a removable switch plug for establishing elec
trical contact between said strip and one of said
lead-in terminals.
20
2. A voltage selector switch comprising a nar
row base of thin insulating material, a plurality
of lead-in terminals and at least one take-off
terminal, each of said terminals carried by said
base, said lead-in terminals having plug-receiv
25, ing portions, a conducting strip, a wide panel of
thin insulating material interposed between said
strip and lead-in terminals, said wide panel
overlying the lateral edges of said base and said
terminals except at the plug-receiving portions
30 of said lead-in terminals, a fastening means for
parallel relation to said base and adapted for
connection to an electrical conductor, a take-off
terminal carried by said base and having a wire
receiving tab extending in substantially the di
rection of the tabs of said lead-in terminals, a 5
conducting strip normally insulated from said
lead-in terminals but in electrical contact with
said take-off terminal, and means for optionally
establishing an electrical conducting connection
between said strip and one of said lead-in ter 1O
minals.
4. A voltage selector switch comprising a thin
base of non-conducting material, a plurality of
lead-in terminals, a plurality of take-01f termi
nals, each of said terminals carried by said base
and having a wire-receiving tab extending lat
erally beyond the edge of said base, a conducting
strip, a thin insulating panel interposed between
said strip and lead-in terminals, and means per
manently connecting said strip and take-off ter 20
minals in electrical contact and providing the
sole means for connecting said base, strip and
panel together.
5. A voltage selector device of the class de
scribed comprising a thin base plate of insulat 25
ing material, a number of independent contacts
attached to said plate, each of said contacts hav
ing a wiring terminal and a connector-receiving
portion, said terminal and said connector-receiv
movable switch plug for establishing electrical
contact between said strip and lead-in terminals.
3, A voltage selector switch comprising a base
of insulating material, a plurality of lead-in ter
minals carried by said base, said lead-in terminals
ing portion of each of said. contacts being in 30
tegral one with another, a second thin plate of
insulating material covering said contacts ex
cept at the connector-receiving portions, a con
ductor strip superposed upon said second plate
and having apertures in alignment with the con 35
nector-receiving‘ portions and a removable con
nector for optionally establishing an electrical
connection between said strip and one of said
comprising a body portion and a tab projecting
contact terminals.
connecting said base, strip and panel together, a
means permanently connecting said strip and
take-off terminal in electrical contact and a re
401 laterally from said body portion in substantially
'
ERNEST CLARK.
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