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Патент USA US2367090

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Jan. 9, 1945.
T. BIRKENMAIER
2,367,090
ELECTRIC SWITCH
Filed Oct. l5, 1942
H6125 ß
3 Sheets-Sheet l
Jan. 9, 1945.
T. BlRKENMAlER
2,367,090
ELECTRIC SWI TCH
Filed Oct. 15, 1942
3 Sheets-Sheet 2
Jan. 9, 1945.
T. BIRKENMAIER
2,367,090
ELECTRIC SWITCH
Filed oct. 15, 1942
4 FIGBì
29
a
27
M_ l?
en „7
/Z 2f
8/ /5/09/0557
3 Sheets-Sheet 3
Ratented Jan. 9, 1945
2,367,090
UNITED STATES PATENT OFFICE
2,367,090
ELECTRIC SWITCH
Theodore Birkenmaier, St. Louis, Mo., assiznor to
W. N. Matthews Corporation, St. Louis, «Mo.,
a corporation of Missouri
Application October 15, 1942, Serial No. 462,179
6 Claims. I (Cl. 200-126)
This invention relates to electric switches,- and
with regard to certain more speciñc features, to
repeating electric fuse switches.
The invention is an improvement upon the type
of construction shown in my United States Pat
2, and wings 4 serving as weather guards. Each
also has a cam surface 11 leading into a socket
19.
~
The hoods I9, 2| and 23, along with the struts
Among the several objects of the invention
may be noted the provision of/a foolproof repeat
ing fuse switch having a simple, compact, reliable
and enclosed structure for providing time~delay
action between successive circuit reclosures; and
I1 pivot as a unit upon said bearings I3 and, in
order to assure electrical transmission between
the bracket 5 and the arm I5, braided copper wire>
25 connects the two. This wire allows for free
relative movement between the members 5 and
I5.
A tension spring 21 reacts between an eye 29
the provision of a switch of the class described
carried on the arm I5 and an eye 3I carried on
ent 2,240,253, dated April 29, 1941.
which, despite the time-delay features, effects
snap-action circuit reclosure through successive
ly operative fuse holders. Other objects will be
the bracket 5.
in part obvious and in part pointed out herein
after.
The invention accordingly comprises the ele
ments and combinations of elements, features
of construction, and arrangements of parts which
will be exemplified in the structures hereinafter
described, and the scope of the application of
which will be indicated in the following claims.
In the accompanying drawings, in which is i1
lustrated one of various possible embodiments of
The line C-L of axial tension of
this spring 21 passes beneath the pivot I3, there
by tending to bias the arm I5 downward. The
maximum downward position that may be as
sumed by the arm I5 is determined by lugs 33 on
the arm I5 cooperating with adjustable stops
35 on the bracket 5.
20
'
On the lower end of the insulator 3 is a
bracket 31 held in place by means of a saddle
piece 38 and screws 39. This bracket also carries
openings such as 9, one of‘which receives a line
wire connector II. The bracket 31 carries three
pairs of arms enumerated respectively as 4I, 43
the invention,
and 45, arranged in descending order by pairs as
Fig. 1 is a side elevation of the switch shown
indicated in Figs. 1 and 2. Each pair has sup
in closed position and ready for operation;
porting slots 41 for gudgeons 49 of fuse holder
Fig. 2 is a right-side elevation of Fig. 1;
assemblies indicated at A, B and C, respectively.
Fig. 3 is a fragmentary horizontal section taken 30 Each fuse holder assembly A, B and C is con
on line 3-3 of Fig. 1, but reversed in position;
stituted by an insulating fuse tube 5I carrying an
Fig. 4 is a vertical section taken on line 4-4
upper conducting head 53 into which is screwed
of Fig. 2i
a round-nose conducting cap 55. Each cap 55
Figs. 5 to 7 are views similar to Fig. 4, showing
may be removed from its head 53, for the pur
successive operating positions of the parts in
volved in Fig. 4; and,
" pose of inserting a fuse link 51 through the fuse
tube 5I and thereafter screwing down the head
Fig. 8 is a fragmentary view of a lower por
55 to hold the upper end of said link. The link
tion of Fig. 1 illustrating opening action of the
passes through the fuse’ tube and out of its lower
lower end of the fuse holder, the same being
end. At the lower end of'each fuse tube 5I is a
40 clamp 59 carrying an extension eye 6I. Pivoted
viewed on line 8-3 of Fig. 2.
Similar reference characters indicate’ corre
at 63 to the clamp 59 is an arm 65 of bell-crank
sponding parts throughout the several views of
the drawings.
Referring now more particularly to Fig. 1, there
is shown at, numeral I an arm for holding a verti
shape carrying the respective pair of gudgeons
49 for the fuse holder assembly under considera
_ tion.
This bell-crank arm 65 has a normal po
sition such as shown in Fig. 1, the unbroken
fuse link 51 holding it in such position. The fuse
link maintains the stated position because of its
cal insulator 3. At the upper end of this insulator
is held a laterally extending bracket 5, thev same
being held in place by a screw clamp 1. This
attachment to the arm 65 at a screw terminal 61
bracket 5 has suitable openings 9 for receiving,lr (in
and its attachment at 55.
50
Whichever opening desired) a line wire connec
In order to hold a fuse holder assembly upright
tor Il.
at positions B or C in Figs. 1 and 2, each eye 6I
Pivoted to the bracket 5 at points I3 is a mul--l
is provided with a. lateral finger 69. In the cases
tiple-contact arm l5. This arm l5 is :made up
where a fuse .link assembly (all the assemblies
rigidly with struts I1 carrying at their ends con
are alike) is inserted in the brackets 43 or 45
tact hoods I9, 22H and 23. Each hood has skirts
(positions B or C), the fingers 69 serve support
2
assoc/,coo
ing purposes in connection with hooks 1I pívoted
bly A) , the catch of pawl |01 is engaged with the
at 13. Each hook 1| is biased downward by a
spring 15. Hence when fuse holder assemblies
are positioned with their gudgeons 49 in the slots
41 at positions B or C, the levers 65 at this time
being held against the lower ends of the tubes 5l
ratchet.
ratchet While the catch of the pawl |09 is not,
the latter being spaced some distance from the
.i
Upon blowing of the .fuse in the fuse holder
assembly at A and dropping-out of this assembly,
the bias ofthe arm i5 is brought to bear (through
by the links 51, and rotated outward, the hooks
the mechanism 99, 95, 89, 9_1, |03) to pull down
I 1I will catch the fingers 69 and support these two
the pawl |01 which at this time is in engagement
10 with the ratchet wheel I I |. The result is that the
shown in Fig. 2.
.
escapement mechanism outlined is driven. The
Each arm 1l is prevented from descending too
cscapement mechanism provides time-delay while
far after release by means of contact between
permitting movement until the next succeeding
a. stop |0 on the arm and the upper surface
socket 19 of member 2| approaches the fuse link
of the respective adjacent support 43 or 45
the
assembly positioned at B. However, before con
case may be.
tact made between 2| and the upper end of this
The fuse holder assembly that is placed in trie
inse link assembly at B, the catch of the pawl |01
A position (Fig. 2) also carries a ringer E9 but
:arranged to slip from engagement with the
only io the purpose of interciialigcability and
ratchet III (Fig. 5) so as to bring about a sud
'uniform
When a fuse holder assembly .is
den contact between the member 2| and the top
placed in position A the nnger t9 is of no use
oi this second fuse link assembly. This tends to
otherwise. because when the inse holder is ro~
avoid arcing contact. At the same time the catch
i' ‘d upward in position A its contact head 55
fuse holder assemblies in the B and C positions
of the pawl |09 comes near to initial engagement ,
en nigcs the sloping cam
‘ll oi the socket
I9 and cams the` arms l5 upward.
the con
with the :ratchet lII, as indicated in Fig. 5.
it, when,
inse linlf; in the ruse holder as»
nortion 55 moves into the socket '15, where»
'. i1; ,n the Abias
the sp.
- 2l”
i5 downward acts to hom the
"'
casina“ the ari'n
_ .
- --
.
„.
positions
bly in position
B andA.C The
are spaced
.fuse holat increasing
assemblies
biotic, and that fuse holder ‘falls away,
- ...lravflng its support from the arm, I5,
almost immediate engagement between the pawl
lllg and the
li icou‘oles "up the gea-r train
i'or time-»delay action as indicated between Figs.
5 and
This
again under downward bias of
arm l5. 'Ii’he time-»delay action now proceeds un
til
socio`
in member 2t approaches the
head, 55 oi tilt-i third fuse holder assembly in po
35 sition C. Before contact is made, the catch of
tanccs from the sockets in members 2i and 23 by "
reason of their descending order ci support.
In order to delay circuit reclosing actions
through the fuse holders at positions B and il?.
a time~de1ay mechanism M is
This mech»
anism comprises a gear bor; 9| rigidly fastened
pawl H19 slips from the ratchet l i i to permit final
to the bracket 5 by means of a bolt 83.
quick: reclosinc.' action of the circuit. The posi~
The box is provided with a cover B5. Within
tion of parte with the circuit closed through the
is a main shaft 81 which also reaches exterior-ly.
i'use holder assembly at C is shown in Fig. 6.
Here the shaft 91 is provided with a keyed arm
40
Finally. when the fuse link in the fuse holder
99 having at its end an arcuate slot 9i for angu
assembly at «Si blows, the corresponding fuse hold
larly adjustable connection at 93 with an. arm 99.
er mselnbiy drops out, and since neither pawl |01
The end of the arm 95 is ‘Divotecl at 91 to an oft»
nor |09 is engaging the ratchet wheel III, the
set connecting link 99 which in turn is pivoted at
'lugs 33 engage the
|0| to one side of the contact arm I
Thus down à c: alim iE moves down uch
stops 35, This ends its travel.
ward rotation of the arm I5, through the linkage
It is to he noted *im* when the upper pívoted
99, 95, and 09, tends 'to rotate the shaft 81. The
purpose of the rotary clamping adjustment at the
slot 93 is to obtain angular phase adjustment
between the arm i5 and the shaft B1.
Referring to the interior of the bor; 8l, the
shaft 81l has keyed to it a bifurca'ted arm |03
>having a pivot pin |05 for a pair ci pavvls |01 and
|09, both of which, by means c'î- spring H3, are
normally biased toward engagement with a ratch
et wheel I I I. The ratchet wheel i I I is on a corn
mon shaft ||5 with a gear |11 that meshes with
Contact ar.
‘
swings down into
contact with
60
tions, the soc
B and C posi
pc
, ne
cavities 19 in the
members ti and 23 tend to cam the fuse holders
backward -from the positions shown in Fig. l,
so that the respective- pins 69 are drawn away
from the associated notched portions of the hook
1|. This is because the sockets or cavities 19 have
a larger radius than the respective heads 55 which
cooperate therewith, as indicated in Fig. i. The
a pinion |I9. Pinion ||9 forms a rigid cluster
(on. a countershaft |20) with a gear |2| which
meshes with a pinion |23 on a shaft |25, the lat~
ter also carrying an escaperncnt wheel |21. The
teeth |29 of the cscapement wheel successively
contact pallets I3I struck ‘up from an oscillatmg
socket in each hoo-:l 2| and 23 is positioned to
strike its respective head 53 with the front slope
of the cavity. In other words7 the cavities in 2|
and 23 are not positioned for initially centrally
striking the heads 53. lin the case of the first
tube A. under hood I9 such positioning is not
escapement anchor wheel |33. ‘îi'hus
ary and in. this case the cavity may be een»
over the head 53. since there is no catch
.z
69 ci tube A. Thus the front slope
or each cavity in hoods 2i and t3 acts as a cani
on the ratchet III is transmiy
gearing |I1, IIB, |2|, |23 tothe'
stituted by the members I‘t'i, ‘iii an
3c.
escapement provides a. time~delay action. The
successive oscillating actions of the Wheel i533 in
effecting escapement are indicated in Figs. i, to '1.
The pawl |01 has a. catch for the ratchet wheel
I l l' which is lower than (or ahead of) the catch
of the pawl |09. Therefore, when the arm i5 is
up. as indicated in Fig. 4 »ithe position which it
assumes when resting upon the fuse holder assexn~
to drive the respective head 55 backward into the
center or rea bortion of the cocliet, whereby the
latch relcasi
"ect on the respective pings 69
on tubes
alla l..
obtained. The action, being;
like a blow, is very effective for the latch releas
ing purpose. ’l c members 2i and 21| are stepped
forward as indicated in. Fig. i to permit proper
coactioi?A witlfi the heads 53 oi“ the forwardly
2,867,090
stepped tubes B and C. Thus, Just prior to the
falling out ol' the fuse holder from either the
B or C position, the respective pin 69 is pushed
back to be free of holding action by the respective
hook 1|. Hence the clearing position of the pin
69 shown in Fig. 8 is easily reached, without
interference.
This improves the reliability of
3
conditions applied thereto, the other conducting
means being pivoted, means biasing said pivoted
conducting means toward successive engagements
with said switch means and normally contacting
the highest of the same, time-delay means com
prising a single escapement means, a single
the release.
Among the advantages of the invention is the
ratchet means driving said escapement, latches
for the ratchet means, a linkage connecting said
o1' the fuse holder assemblies.
spaced conducting means on the support, one of
said conducting means constituting a series of
pivoted conductor and the latches, said latches _.
fact that the time-delay mechanism is up above l10 being
arranged to catch and release from the
the arm I6 and out of the way, the same being
ratchet means successively.
compactly enclosed and arranged, controlling all
2. A repeating fuse switch comprising a support,
The location of
the time-delay apparatus leaves the region be
tween the upper arm l5 and the lower arms
4|, 43 and 45 entirely free for application and
closing in manipulation of the fuse holders, just
as is the case in a fuse holder in a non-repeating
switch.
pivot means, substantially identical collapsible
fuse switch means respectively pivoted in descend
ing order in said pivot means and collapsible in
response to overload current applied to the fuses,
the other conducting means being pivoted, means
Another advantage is that in a very compact 20 biasing said pivoted conducting means toward
mechanism both a time-delay eiTect is obtained
successive engagement with said switch means and
and also a quick action contact for a succeeding
normally contacting the highest of the same,
reclosure after a given time-delay.
time-delay means comprising a single escapement
The device is reliable, foolproof, and reclosure
means, a single train of gears driving the escape
is simple, being simply rotary re-application of
ment means, a single ratchet means driving said
loaded fuse holders to arms 4|, 43 and 45.
train of gears, latches for the ratchet means, a
In addition, the operator may fuse and organ
linkage connecting said pivoted conductor and the
ize the device with any one or more of the fuse
latches, said latches being arranged to catch and
holders. For example, he may rely for time-delay
release from the ratchet means successively.
action upon any pair of fuse holders, such as a 30
3. A repeating switch comprising a support,
pair at A and B or a pair at B and C. If greater
spaced conducting means on the support, one of
time-delay is required for operating only a pair
said conducting means constituting a series of
of fuse holders he may use the device with fuse
pivot means, collapsible switch means respectively
holders at A and C only. Under the latter condi
pivoted in descending order in said pivot means
tions the time-delay between release of fuse holder
and collapsible in response to electrical overload A and insertion of fuse holder C into the line
conditions applied thereto, the other conducting
is the sum of the ordinary time-delays between
means being pivoted, means biasing said pivoted
operations required between A and B plus B and C.
conducting means toward successive engagements
'I'his is because, when latch lOl-releases and there
with said switch means when uncollapsed and
is no fuse holder at B, the latch |09 hooks into 40 normally contacting the highest of the same, time
the ratchet ||| and delays further motion of
delay means comprising a single escapement
the arm I5 in its iinal travel into contact with the
means, a single train of gears_driving the escape
fuse holder at C (assuming the fuse holder at B
ment means, a single ratchet means driving said
to be missing).
train of gears, latches driving the ratchet means,
Another feature is that the operation of . a linkage connecting said pivoted conductor and
the time-delay mechanism is not deleteriously
affected by the position of the device as a whole.
For example, although it is shown vertical in the
drawings, various degrees of tilt will not aiïect
the latches, said latches being arranged to catch
and release from the ratchet means'successively,
the catching period oi.' a given latch being ar
ranged for controlled biased movement of the
pivoted conductor from the time that one switch
member collapses and disconnects from the
It will be understood that manipulation of thepivoted conductor until the pivoted conductor ap
fuse holders is accomplished generally by use of
proaches the next non-collapsed fuse holder.
the ball-end of a lineman’s stick in the eyes 6|,
4. A repeating fuse switch comprising a sup
which are presented forwardly when the holders
fall into depending positions. Fig. 8 shows an 55 port, spaced conducting means on the support,
one of said conducting means constituting a series
intermediate position in a falling operation, just
of pivot means, substantially identical collapsible
before an eye 6| rotates to the said forward posi
tion.
‘
fuse switch means respectively pivoted in descend
ing order in said pivot means and collapsible in
In view of the above, it will be seen that the
several objects of the invention are achieved and 60 response to electrical overload applied to the fuses
therein, the other conducting means being pivoted,
other advantageous results attained.
means biasing said pivoted conducting means t0
As many changes could be made in the above
Ward successive engagements with said fuse switch
constructions without departing from the scope
of the invention, it is intended that all matter con 65 means and normally contacting the highest of
the same, time-delay means comprising a single
tained in the above description or shown in the
escapement means, a single train of gears driving
accompanying drawings shall be interpreted as
the escapement means, a single ratchet; means
illustrative and not in a limiting sense.
driving said train of gears, latches driving the
I claim:
1. A repeating switch comprising a support, 70 ratchet means, a linkage connecting said pivoted
conductor and the latches, said latches being ar
spaced conducting means on the support, one of
ranged to catch and release from the ratchet
said conducting means constituting a series of
means successively, the catching period of a given
pivot means, collapsible switch means respectively
latch being arranged for control of the pivoted
pivoted in descending order in said pivot means
conductorfrom the time that one fuse switch
and collapsible in response to electrical overload 75 member collapses from the pivoted conductor
. 1t.
4
aneignen
spaced
said conducting
conductingmeans
meansconstituti
pivot means, a plurality ci? c:
means respectively pivoted in
a series of
- means and collapsible in response to electrical
_, Z1) sa.lile switch
r Ming order in
«ducting means being pivoted, means biasing said
i. said switch
ward successive engagements
„ne nearest of
means and normally Contactin
the escapement means, a
`
„
ig a single
f gears driving
tchat means
ing the
driving said train of gears,
gagements with «said fuse holders and normally
only contacting the nearest of the same, tinie~delay means comprising a single escapement means,
a single train of gears driving the escapement
means, a single ratchet means driving said train
of gears, latches driving the ratchet means, a
linkage connecting said pivoted conductor and the
latches, said latches being arranged to catch and
release from the ratchet means successively, the
catching period of a given. latch being arranged
the ratenet
ad of a given
the nivoied
“i
by collapsing until the nivo-ted conductor ai»
preaches
', “n ‘however
the next
releasing
non-collegiaal
from theinse holder,
means
1w
lati
tlie neat
member, the latcliine' however
ratchet means before contacta is
`
for control of the lpivoted conductor from the time
that one fuse holder leaves the pivoted conductor
means successively, the can;
leaves the pivoted conductor
the pivoted conductor approae
pívoted conducting means toward successive en~
‘seing ar»
conductor and the latches,
ranged to catch and rele:`
conductor from the time "
overload conditions applied thereto, the other con».
pivoteti
ratchet means, a linkage
latch being arranged for «co
of pivot means, collapsible fuse holders respec~
tively pivoted in descending order in said pivot
a support,
mrt, one of
said pivot means and individually oliapsibie in
response to electrical overload col
ions applied
ng pivoted,
thereto, the other conducting me?
means to»
means biasing said pivoted con in
escapement means, a single train.
one of said conducting means constituting a series
use holder,
fore it contacts the next nonnel m
5. A repeating switch co
the same, time-delay means c
port, spaced conducting means. on the support,
but be~
until the pivoted conductor ai
with said
second switch member, whereby' said ‘pivoted cone
duc-,tor may approach `the second switch member
untrammeied by the timeW-del y mechanism une.
under pure bias on said pivoted comino 'ne means.
6. A repeating inse switch, comp.. [email protected] a
preach the second inse no er nntri in
time~delay action and under
`
between said pivoted conducto
'I'IHEODÜRE BlRFILÍiSMMAIER.
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