Switch. Page: 2 of 3
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UNITED STATESPATENT OFFICE.
EDWARD J. KILMER, OF CORPUS CHRISTI, TEXAS,
SWITCH.Specoication of Letters Patent. Patented Nov. 19, 1918.
Application ;pled January 3, 1918. Serial No. 210,167.To all whom it may concern:
Be it known that I, EDWARD J. KILMER, a
citizen of the United States, residing at Cor-
pus Christi, in the county of Nueces and
5 State of Texas, have invented certain new
and useful Improvements in Switches, of
which the following.is a specification.
This invention relates to switches, and
more particularly to a multiple point switch.
10 One of the main objects of the invention
is to provide a switch plug which may be
secured in a light socket of standard con-
struction, this- plug being adapted to re-
ceive a plurality of lamp globes of standard
15 construction and having means for option-
ally connecting any one of said globes into
the circuit so as to illuminate the same inde-
pendently of the other globes or lamps. A
further object is to provide simple and effi-
20 cient means for controlling the circuits of
the lamps. Another object is to provide
control switches having wedge members for
connecting the contacts bf the lamps with the
contacts of the plugs, these members en-
25 gaging the contact snugly and having slid-
ing or wiping engagement therewith so as to
insure clean contact surfaces. Further ob-
jects will appear from the detailed descrip-
tion.
30 In the drawings:
Figure 1 is a top plan view, partly in sec-
tion. of a switch control means constructed
in accordance with my invention.
Figs. 2, 3, and 4 are detail perspectives
35 of various forms of switch handles which
may be employed.
The body 1 of the plug casing is of cylin-
drical shape being directed with the up-
wardly directed peripheral flange or wall 2.
40 This casing is formed of metal, any suitable
metal which is a good conductor of electri-
city being used. The flange 2 is provided
with a plurality, in this case 3. radially dis-
posed equally spaced screw sockets 3. These
45 sockets are directed outwardly and are
adapted to receive the socket members 4 pro-
vided at the inner ends of the lamps 5, these
socket members and the lamps being of
standard construction. Each socket mein-
50 ber 4 is provided at the center of its inner
end with an inwardly directed rounded con-
tact 6. This contact is in axial alinement
with a similar contact 7 formed at the outer
ends of a cylindrical metallic arm 8 which
55 is secured to the metallic covering 9 of a
screw plug 10 of standard constructionwhich is secured at the center of casing 1.
This screw plug is adapted to be threaded
into the usual socket in the well known man-
ner, being provided with the central contact 60
11 which is electrically connected to the cas-
ing 1 by the usual lead, the metallic covering
9 of this plug terminating short of the casing
so as to be electrically insulated therefrom.
It will be evident that, when the two contacts 65
6 and 7 are electrically connected the circuit
for lamp 5 will be closed, thus illuminating
the lamp.
A switch arm 12 is pivotally secured at its
inner end to the casing 1, as at 13. This 70
switch arm is formed from wood or other
suitable electrical insulating material, and
projects through a slot 14 through flange 2,
being provided on its outer end with an en-
larged head or grip 15. The central por- 75.
tion of arm 12 is cut away to provide a flat-
tened member 16 adjacent each end of which
is formed a limiting shoulder 17. A switch
blade 18 formed from copper or other suit-
able metal is pivotally secured at its outer so
end, as at 19, to the flattened member 16
of the switch handle. The inner portion
18a of this blade is disposed at .an angle to
the outer portion and has its inner end cut
at a slant or bevel as at 20. The switch as
blade is of such width as to fit snugly be-
tween the contacts 6 and 7 when the switch
handle is swung into operative position ad-
jacent the socket 3, as shown in the lower
lamp in Fig. 1 of the drawings. Due to 90
the bevel or taper given the inner end of the
blade, this blade acts as a wedge member
which can be forced tightly between the
contacts so as to be in tight engagement
therewith. Also, due to its sliding move- 95
ment across the contacts, the blade pro-
vides .a wiping contact with both of the con-
tact members 6 and 7 thus insuring that the
contact points will be at all times clean and
polished, thus doing away with corrosion 100
anl roughness of these elements.
While I have described my switch as used
more particularly in connection with elec-
tric lamps, it will be evident that it may be
used equally well for controlling electric 105
circuits for various purposes, and I do not
intend to limit myself to this single use of
my invention above described.
It will be evident that there may be slight
changes made in the construction and ar- 110
rangement of the different parts of my in-
vention without departing from the field and1,285,223.
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Kilmer, Edward J. Switch., patent, November 19, 1918; [Washington D.C.]. (https://texashistory.unt.edu/ark:/67531/metapth1256439/m1/2/?rotate=270: accessed July 17, 2024), University of North Texas Libraries, The Portal to Texas History, https://texashistory.unt.edu; crediting UNT Libraries Government Documents Department.