close

Вход

Забыли?

вход по аккаунту

?

Патент USA US3059079

код для вставки
Oct. 16, 1962
3,059,069
B. S. SEDLEY
CONTROL MEANS FOR ELECTRICAL CIRCUITS AND THE LIKE
2 Sheets-Sheet 1
Original Filed July 1, 1959
27
INVENTOR.
2
' -3.
TAPE
PLAY BACK
MACHINE
23
BRUCE $.SE'DLEY
"'7 J; BY am an‘
26/
ATTORNEY
Oct. 16, 1962
B. s. SEDLEY
3,059,069
CONTROL MEANS FOR ELECTR ICAL CIRCUITS AND THE LIKE
Original Filed July 1 ,
2 Sheets-Sheet 2
1959
a 222'.‘
32
40
341 _
15k
NVENTOR.
BRUCE 5. 5501.5)’
BY
42M
ATTORNEY.
tare
me
3,059,069
Patented Oct. 16, 1962
2
2.
novel lock-and-key arrangement, for there are special
problems where such use is made of it.
3,059,069
CONTROL MEANS FOR ELECTRICAL
A further object of the invention is to provide a lock
CIRCUITS AND THE LIKE
and-key type of electrical switch that is as simple and
Bruce S. Sedley, Fairfax, Calif., assignor to Audio Sys
as nearly foolproof as is possible.
tems, Inc., San Francisco, Calif, a corporation of Cali
Another object of the invention is to provide a rela
fornia
tively
tamper-proof switch arrangement. In the present
Continuation of application Ser. No. 824,289, July 1,
invention, this is done by using a plurality of electric
1959. This application Feb. 15, 1961, Ser. No. 89,897
switches in series, each having its own switch plunger.
12 Claims. (Cl. 200-42)
10 This makes it impossible, or at least quite impractical, to
This invention relates to improvements in control means
for electrical circuits. More particularly, it relates to a
depress both switch plungers by use of a nail or other
article different from the actual key itself. Usually two
novel electrical switch of the lock-and-key type. This
switches are enough, but more may be used if desired.
Another object of the invention is to provide a key
case is a continuation of application Serial No. 824,289
?led on July 1, 1959, now abandoned.
15 especially well adapted for the purpose and for use as a
An example or two will give an idea of how the inven
souvenir article.
Another object of the invention is to provide an attrac~
tion is used. At a children’s park in Oakland, California,
a series of sets illustrates a series of nursery rhymes. At
tive system for encouraging children or adults to patronize
each nursery-rhyme set a metal standard supports what
an explanation system, or story, or the like accompanying
looks like a large book
about the size and thickness of 20 an exhibit.
Another object is to provide a novel mounting and
of this “book” is a keyhole and the title of the nursery
assembly of the lock and support.
rhyme, but inside the “book” is a loudspeaker, and the
Other objects and advantages of the invention will
keyhole leads to a special lock embodying the principles
appear from the following description of a preferred em
of this invention. At the entrance to the park, a mechani 25 bodiment thereof.
a telephone book.
All that can be seen on the outside
cal vending machine sells plastic keys embodying the
In the drawings:
principles of this invention. Any of these keys will ?t
FIG. 1 is a View in perspective of a book-like installa
tion incorporating an electric switch arrangement embody
ing the principles of this invention. A key is shown par
does this by putting the key in the keyhole and turning 30 tially inserted into the opening.
the key about 180°.
FIG. 2 is a view partly in perspective and partly in
What happens, then, is that the key operates the plung
diagrammatic form, showing the book installation of FIG.
ers for two microswitches that are electrically connected
1 with its switch connected to a tape playback machine
in series. Turning the key closes the switches and actuates
and the tape playback machine connected to a loud
an electrical message-repeater-a type of tape-playback
speaker in the book installation.
machine. This message-repeater then plays a recorded
PEG. 3 is an electrical diagram of a portion of the
message through the loudspeaker inside the “book,” and
circuit of FIG. 2, showing the plurality of switches in
the message may be heard by anyone standing directly
series with each other and with the tape playback ma
chine.
outside the “book.” The message may, for example, be a
FIG. 4 is an enlarged view in perspective of the lock
musical version of the nursey rhyme that is represented
all the locks in the park. When a child buys one of these
keys he can “unlock” every “book” in the park. He
by the set, or it may tell a story.
The message-repeater need not be in the “book” or
even very close to it, though preferably the connecting
wires should not be too long. But the point is that a
child who has the key can hear all the messages in the
park, and one who doesn’t have the key cannot hear them
except by tagging along ‘with one who has.
and-key arrangement of this invention, showing the elec
trical switch element adjacent the lock and the key out
ide the lock. To show the parts more clearly, the lock
and key have been shown upside-down.
FIG. 5 is a perspective view of the key in PEG. 4, shown
upside-down.
FIG. 6 is a perspective view of the mounting assembly
for the lock of FIG. 5.
walks-wherever a spoken, audible description of what is
FIG. 7 is a view in elevation and in section of the lock
being seen is desired. And it has other uses, many of 50 of PEG. 4, with the lock rotated 90°.
them obvious to a skilled man in this ?eld. For exam
FIG. 8 is a View in elevation and in section similar
ple, a slide projector may replace the message-repeater.
to FIG. 7, but showing a key shank inserted therein pre
One advantage of the system of this invention is that
paratory to operation and showing portions of the mount
ing plates for the lock.
it does away with the nickel-in-the-slot type of operation
at each loudspeaker. Only one vending machine is needed; 55 FIG. 9 is a View in section taken along the line 9-9
of FIG. 7.
the one at which the keys are sold. In Oakland, each key
is sold in a box, complete with a “gold” chain and printed
FIG. 10' is a view taken in section along the line lit-10
of FIG. 8.
tag that explains its use and lists the different sets where
there are locks operated by the key. The children are
EEG. 11 is a plan view of one-half of the switch-body,
encouraged to use the key to hear all the stories and
showing the receptacle arrangement and the actuating
then to take the key home and be sure to bring it back
portions thereof, and portions of the mounting plates and
screws.
with them the next time they visit the park. They use
it again and again, and the key will always operate all the
FIGS. 1-3 illustrate a typical installation of the in
“books” in the park. That encourages re-attendance at
vention, wherein a novel key 15 is used in a novel lock
the park, where admission is charged, and encourages 65 16 to actuate an electrical circuit incorporating a mes
sage-repeater 17 and a loudspeaker 18. Here, the lock
many others to visit the park. It also encourages every
one to have his own key.
16 is mounted in a book-like housing 20, and a faceplate
From the foregoing, it will be seen that one of the
21 for the lock 16 lies outside the front face 22 of the
main objects of the invention is to provide a customer
“book” 20‘. The lock 16 supports a pair of switches 23'
operated electrical starting-switch arrangement which is 70 and 24 (FIG. 2). More switches may be used if desired,
feasible for use by many different customers.
the key and lock being modi?ed accordingly, but two
Another object of the invention is the provision of a
are normally su?‘icient and fewer are too few.
The same thing can be done in 2005, museums, nature
3,059,069
3
4
The loudspeaker 18 may be supported by the housing
20, or elsewhere if desired; if supported by the housing
holes for the pins and plungers may be bored at different
locations.
The key 15 has a handle of)‘ and a generally cylindrical
20, slits 19 allow passage of the sound. The repeater 17
is usually supported elsewhere. It is connected to the
shank 61.
The handle dtl is preferably flat and has a
switch 23 by a wire 25 and to the switch 24 by a wire
stop member 62 that engages a stop member 63 on the
26 (see ‘FIGS. 2 and 3). The switches 23 and 24 are
faceplate 21 to stop the key 15 from rotating beyond
a certain amount, preferably 180°. The shank 61 has
connected together by a wire 27, so that they are in series.
a groove 64 that extends axially from a free end 65
to near the handle 61!), where it stops at an end wall 66,
Wires 28 and 29 connect the loudspeaker 18 to the re
peater 17 (FIG. 2). A suitable electric cord 30 may
connect the repeater 17 to a suitable power source, such 10 thereby limiting insertion of the key to the right depth.
The groove 64 has an arcuate bottom wall 67‘ and
as A.~C. current.
a radial wall 6%; that extends the full length of the groove
When the key 15 is inserted in the lock 16 and turned
64 on one side of the bottom wall 67. On the other
approximately 180°, the key 15 actuates the lock 16 to
close both the switches 23 and 24. When and only when
this happens, the repeater 17 is actuated to send its mes
side of the groove 64, the key shank 61 has a series of
sage to the loudspeaker 13, the repeater including not
are cams 7%, 71 one for each switch plunger 48, 49,
each cam '70‘, 71 being a curved segment (preferably
sectors comprising stop bands, cams, and key slots. There
only a tape cartridge and playback head but also an am
186") of gradually increasing radius, leading from said
pli?er.
bottom wall 67 to the full radius of the shank 61. For
As indicated in FIGS. 1, 2 and 6, the annular faceplate
21 ?ts over the box face 22 in line with an opening there 20 each guide pin 5%, 51 there is a key-slot '72, ‘73, prefera
bly of 180°, each with a bottom wall 74 the same radius
as the bottom wall 6-7, with radial sidewalls '75 and an
end wall 76 that lies at the same angle of rotation from
the groove 64- as the end of the cams 7th, 71. There is
fit against the rear side of the face 22 and are held in
place by nuts 34, thereby securing the faceplate 21 se 25 a similar slot 77 for the keyway 56, different only as to
length. Between the guide pins, keyways, etc., and at
curely to the box 20‘. The lock 16 is provided with a
the free end 65, there are stop bands 78, wherein the
projecting ridge 35 that ?ts into a slot 36 in the plate
groove 64 is narrow, preventing the key 15 from turning
21, thereby being locked thereto against relative rota
if the stop bands 78 engage a keyway or guide pin.
tion. A rear lock plate 37 with an opening 38 engages
The lock 16 is normally made from brass, but the keys
the rear face of the lock 16, around a projecting rim
15 are preferably made from a lightweight but strong
39, and is bolted to the studs 32, the pressure against
plastic, such as butyrate. In a typical key 15, the shank
the lock holding it securely in place.
61 is about 716” in diameter, the groove 64 is 1/8” deep
FIGS. 4—11 show the lock 16 and key 15 in more de
and 1/8” wide. The keyway 56 and keyway groove 77 are
tail. The body of the lock 16 is made in two pieces 44'!
and 41, so that it can easily be assembled or taken apart 35 about 5/8” long.
in operation, the key 15 is inserted into the lock 16 and
by inserting or removing some screws 42. Recesses 43
turned. it can be inserted in only one way—where the
may be provided to facilitate disassembly, by prying with
groove 64 permits passage past the keyway 56 and the
a screwdriver. When assembled, the lock body 40, 41
guide pins 58 and 51. The wall 66 stops insertion at ex~
is rectangular in cross-section and has a cylindrical key
hole 44 that goes all the way through from one end to 40 actly the right place; then, and then only, the key 15 can
be turned, and it can be turned only in one direction and
the other. The lock 16 is less than half the thickness
only a limited amount, preferably 180°. Then the stops
of the box 20. The lock portion 41 is a simple piece
62 and 63 prevent further turning, as do the walls 76.
that completes the body and supplies half the keyhole 44
The main purpose of the guide pins 56, 51 is to protect
but has no moving parts. Registration pins 45 facilitate
through. Four threaded studs 32 extend rearwardly from
the rear side of the faceplace and pass through bolt holes
(not shown) in the face 22. A pair of dual Washers 33
45 the plungers 4E}, 49 of the microswitches 23, 24. Without
assembly.
The lock body portion 40 supports the switches 23 and
24 and carries the working parts of the lock 16‘. Each
switch 23, 24 has an operating lever 46, 47, respectively
operated by a spring-mounted plunger 48, 49'. The
plungers 48, 49 are axially aligned in the keyhole 44,
project radially into it, and are radially movable. When
the plungers 48, 49 are substantially ?ush with the keyhole
wall 44, they actuate their respective switches 23 and 24.
There are guide pins ‘50, 51, one associated with and
axially aligned with each switch-plunger 48, 49‘ and, like
them, projecting radially into the keyhole 44. They are
held stationary in the body portion v40‘ by set-screws 52.
Similarly, the plungers 48, 49 may be spring-mounted
(by springs 50a and 51a) slidably in guide studs 53 that
are held by set-screws 54 ‘(see FIG. 9) in the body mem~
ber 40 at a depth equal to that of the guide pins 550, 51.
Between the guide pin 50 and the faceplate end of
the keyhole 44 is a ?at plate 55 that provides the ridge
35 and also keyway 56, an axially extending radial pro
jection, axially in line with the plungers 48, 49‘ and
guide pins 510', 51. The keyway plate 55 may be retained
in place in a slot 57 in the body 40 by a through-screw
58 and a set-screw ‘59 that engages one face of the plate
55'.
The pins 45 mate in registration hole 45a in the 70
body 40.
Since the keyway 56 and guide pins '54, 51 are readily
removable, the lock 16 may be varied by replacing any
or all of them by members of different length, to require
a different ‘key 15 at a different installation.
the guide pins 5t}, 51, a nail or some similar foreign object
could conceivably join the microswitches 23, 24 and some
one without a key could listen.
But with two switch
plungers 48, 49 and a guide pin 50, S1 protecting each
plunger, it is practically impossible to actuate the device
without a key 15.
When the key 15 is turned, it operates the plungers 48,
49 and closes both the switches 23 and 24 simultaneously,
thereby actuating the message-repeater 17.
'
Preferably, the rear end of the keyhole 44 has a tapered
or enlarged opening 89, so that if a key shank 61 is broken
oil in the lock 16 it can be removed by pliers without
having to take the lock apart. Also, since the lock 16
is less than half the front—to-rear dimension of the box
Ell, a key 15 which happens to break in the lock 16 before
being turned can simply be pushed out the rear end 81) by
another key 15.
To those skilled in the art to which this invention re
lates, many changes in construction and widely differing
embodiments and application of the invention will suggest
themselves without departing from the spirit and scope
of the invention. The disclosures and the description
herein are purely illustrative and are not intended to be
in any sense limiting.
I claim:
1. A key-operated electric switch assembly, including
in combination: a lock assembly having a keyhole with
an inlet end, a plurality of axially aligned radially mov
able spring-mounted switch plungers normally projecting
Also, the 75 radially into said keyhole, a plurality of stationary guide
3,059,069
with stop means thereon engageable with said faceplate
stop means after said key has been inserted and turned
pins axially aligned with‘said switch plungers, one closely
adjacent each said switch plunger, between said switch
plunger and said inlet end and projecting radially into
180° and a generally cylindrical shank connected to said
handle at one end and having a free end and insertable
vsaid keyhole and acting to prevent simultaneous move
ment of said plungers by a nail-like member that lock
in said keyhole, said key shank having an axially extend
ing groove open at said free end and stopped near said
handle end, with a bottom axial wall, an axially extending
radial wall on one side of said bottom wall lying substan
tially perpendicular to the plane of said handle and on
an electrical circuit; a plurality of electric switches in said 10 the other side a series of sectors comprising stop bands
de?ned by an axial wall, cams de?ned ‘by a 180° cylin
circuit in series with each other, each operated by radially
drical segment of smoothly increasing radius leading
outward movement of one said switch plunger, all said
from the groove bottom wall out to the full radius of said
switches having to be closed before electrical current can
shank, and 180° arcuate slots with a ‘bottom wall the
flow through said circuit; and a key, comprising a handle
and a shank having a free end and insertable in said key 15 same depth as said groove and opening thereinto with
arcuately extending radial walls and end walls axially
hole, said key shank having an axially extending groove
aligned with the portions of said cams at substantially
enabling its passage along said keyway and guide pins;
the full radius thereof, said key having a said cam for
a series of arcuate sectors leading from said groove, said
each said switch plunger, for operation thereof, a said
sectors comprising cams for operating said plungers and
slots enabling rotation relative to said guide pins, said 20 slot for each said guide pin, and a said slot for said key
way, with said bands for the portions where said lock has
key when inserted and turned actuating said switches by
no keyway, guide-pin, or cam, whereby said key, when
operating said plungers.
inserted into said lock, can be turned about 180° until
2. In an electric switch operated by insertion and turn
said stop means or said handle engages said stop means
ing of a key, a lock assembly comprising a ‘body with a
on said faceplate, but can be turned only after full in
generally cylindrical keyhole having an inlet end, a plu
pickers might insert into said keyhole, and a keyway
comprising an elongated member axially aligned with
said plungers and guide pins and projecting into said key
hole and lying closer to said inlet end than said guide pins;
25
sertion thereof, and whereby said switch plungers cannot
be simultaneously depressed without a said key.
5. In a key-operated electric switch actuated by in
sertion and subsequent rotation of a key, a lock assembly
with said switch plungers, one closely adjacent each said
switch plunger between said switch plunger and said inlet 30 having a two-piece tbody de?ning a generally cylindrical
keyhole extending all the way therethrough and open at
end and projecting radially into said keyhole substantially
both ends, and a faceplate at one end of said keyhole,
the same distance that said switch plungers normally pro
one piece of said body having a plurality of axially
ject to prevent picking of said lock, and a keyway com
aligned radially movable switch plungers, spring means
prising an elongated member axially aligned with said
plungers and guide pins and projecting into said keyhole 35 for each said plunger normally projecting them radially
into said keyhole, a plurality of stationary guide and guard
substantially the same distance as they, said keyway lying
pins axially aligned with said switch plungers and each
closer to said inlet end than said guide pins and aiding in
positioned closely adjacent one said switch plunger on
preventing picking of said lock.
the side thereof closer to said faceplate and projecting
3. A key for insertion in a key-operated electric switch
assembly and operation of said assembly by rotation 40 radially into said keyhole substantially the same distance
as said switch plungers to prevent picking of said lock,
therein, comprising a handle and a generally cylindrical
each said guide pin being spaced away from all other
shank connected to said handle at one end and having a
said switch plungers, and a keyway comprising an elon
free end, said key shank having an axially extending
rality of axially aligned radially movable spring-mounted
switch plungers normally projecting radially into said key
hole, a plurality of stationary guide pins axially aligned
gated ‘axially extending radial projection axially aligned
groove open at said free end and stopped near said handle
end, with a bottom wall, a continuous radial wall on one
side and on the other side a series of sectors comprising
with said plungers and guide pins and substantially the
same height thereas and extending from adjacent said
faceplate to a point spaced from the guide pin closest
stop bands de?ned by an axial wall, cams de?ned by a
to said faceplate; a plurality of electric switches con
nected electrically in series with each other ‘and mounted
on said one piece and operated by radially outward move
ment of switch plungers, so that all said switches must be
curved segment of smoothly increasing radius leading
from the groove bottom wall out to the full radius of said
shank, and slots with a bottom wall the same depth as
said groove and opening thereinto with arcuately extend
ing radial walls and end walls axially aligned, the portions
closed for operation of the series arrangement thereof;
and screws holding said pieces together for easy disas
sembly for removal of a broken key.
6. A key for insertion and turning in an electric
switch, comprising a ?at handle and a generally cylin
of said cams at substantially the full radius of said shank.
4. A key-operated electric switch assembly, including
in combination: a lock assembly having a generally cylin
drical keyhole, a faceplate at one end of said keyhole
?aving a stop means thereon, a plurality of axially
drical shank connected to said handle at one end and
having ‘a free end and an axially extending insertion-en
switch plungers, spring means
abling groove open at said free end and stopped near said
said plunger radially into said
stationary guide pins axially 60 handle end, with a bottom axial wall, an axially extend
ing radial wall on one side of said bottom wall substan
plungers and each positioned
tially perpendicular to the plane of said handle, and on
closely adjacent one said switch plunger on the side there
the other side a series of sectors comprising stop bands
of closer to said faceplate and projecting radially into
aligned radially movable
normally projecting each
keyhole, a plurality of
aligned with said switch
de?ned by an axial wall, cams de?ned by a 180° cylin
said keyhole substantially the same distance as said switch
plungers, each said guide pin being spaced away from all
other said switch plungers, and a keyway comprising an
elongated axially extending radial projection axially
aligned with said plungers and guide pins and substantial~
ly the same height whereas and extending from adjacent
said faceplate to a point spaced from the guide pin closest
65
drical segment of smoothly increasing radius leading from
the groove bottom wall out to the full radius of said
shank, so that on turning the key a cam action is obtained
and 180° slots with a bottom wall the same depth as
said groove and opening thereinto with arcuately extend
ing radial walls and end walls axially aligned with the
portions of said cams lying at substantially the full radius
to said faceplate; a plurality of electric switches in elec
trical series with each other and operated by radially out
thereof.
ward movement of said switch plungers, so that all said
7. A key-operated electric switch assembly, including in
switches must be closed for operation of the series ar
combination: a lock assembly having a generally cylin
rangement thereof; and a key, comprising a ?at handle 75 drical keyhole, a faceplate at one end of said keyhole, a
3,059,069
plurality of axially aligned radially movable spring
mounted switch plungers normally projecting radially into
said keyhole, a plurality of stationary guide and guard
pins axially aligned with said switch plungers, one closely
adjacent each said switch plunger between said switch
plunger and said faceplate and projecting radially into
said keyhole substantially the same distance that said
switch plungers normally project to prevent picking of
said lock, and a keyway comprising an elongated mem
8,
tom wall the same depth as said groove and open
ing thereinto with arcuately extending radial walls and
end walls axially aligned with the portions of said
cams that are at substantially the full radius thereof,
said key having a said cam for each said switch plunger,
for operation thereof, a said slot for each said guide pin,
and a said slot for said keyway, with said bands for the
portions where said lock has no keyway, guide-pin, or
cam, whereby said key, when inserted into said lock, can
ber axially aligned with said plungers and guide pins and 10 be turned only after full insertion thereof, and whereby
projecting into said keyhole substantially the same dis
said switch plungers cannot be simultaneously depressed
without a said key.
tance as they, said keyway lying between said faceplate
9. A key-operated electric switch assembly and mount
and the guide pin closest to said faceplate; an electrical
circuit; a plurality of electric switches in said circuit in
ing, including in combination: a housing having a front
series with each other, each operated by radially outward
wall with a hole therethrough; a face plate on the front of
movement of one said switch plunger, all said switches
having to be closed before electrical current can ?ow
through said circuit; and a key, comprising a handle
and a generally cylindrical shank connected to said han
dle at one end and having a free end and insertable in
said front wall surrounding and extending into said hole
and having a central opening and a slot extending radial
said keyhole, said key shank having an axially extending
groove open at said free end and stopped near said handle
end, enabling insertion along said keyway, said guide and
ly from said slot on the rear of said plate; a lock body
in said housing behind said front wall in line with said
central opening, having a keyhole with an inlet end and
a rear end, both de?ned by projecting annular rims, the
rim of said inlet end ?tting snugly in the opening of
said face plate, a plurality of axially aligned radially mov
guard pins, and said plungers, with a bottom wall, a
able spring~mounted switch plungers normally projecting
continuous radial wall on one side and on the other side
radially into said keyhole, a plurality of stationary guide
pins axially aligned with said switch plungers, one closely
adjacent each said switch plunger, between said switch
plunger and said inlet end and projecting radially into
said keyhole, and a keyway comprising an elongated ?at
member axially aligned with said plungers and guide pins
and projecting radially into said keyhole at said inlet end
and projecting axially from said inlet end into the slot of
said face plate; studs projecting rearwardly from said face
a series of sectors comprising stop bands de?ned by an
axial wall, cams de?ned by a curved segment of smoothly
increasing radius leading from the groove bottom wall
out to the full radius of said shank for moving said
plungers when said key is turned, and slots with a bottom ‘
wall the same depth as said groove and opening thereinto
with arcuately extending radial walls and end walls axi
ally aligned with the portions of said cams at substantially
the full radius of said shank, said key having a said cam
for each said switch plunger, for operation thereof when
said key is rotated, a said slot for each said guide pin so
as to permit rotation of said key relative to said guide
pin, and a said slot for said keyway so as to permit ro
plate through said front wall; Washers and bolts on said
studs tightening said face plate to said front wall; a rear
plate ?tting around the rear rim and against said body;
an electrical circuit; a plurality of electric switches in
said circuit in series with each other, each operated by
radially outward movement of one said switch plunger,
tation of said key relative to said keyway, with said bands
for the portions where said lock has no keyway, guide 40 all said switches having to be closed before electrical cur
rent can flow through said circuit; and a key, comprising
pin, or cam, whereby said ‘key, when inserted into said
a handle and a shank having a free end and insertable in
lock, can be turned only after full insertion thereof, and
said keyhole, said key shank having an ‘axially extending
whereby said switches cannot be simultaneously de
groove enabling its passage along said keyway and guide
pressed without a said key being both inserted and turned.
8. A key-operated electric switch assembly, including 45 pins; a series of arcuate sectors leading from said groove,
said sectors comprising cams for operating said plungers
in combination: a lock assembly having a generally cylin
drical keyhole, a faceplate at one end of said keyhole, a
plurality of axially aligned radially movable switch plung
ers each having spring means normally projecting them
radially into said keyhole, a plurality of stationary guide
pins axially aligned with said switch plungers and each
positioned closely adjacent one said switch plunger on
the side thereof closer to said faceplate and projecting
radially into said keyhole substantially the same distance
as said switch plungers, each said guide pin being spaced
away from all other said switch plungers and a keyway
comprising an elongated axially extending radial projec
tion axially aligned with said plungers and guide pins and
when said key is rotated, and slots enabling rotation rel
ative to said guide pins, said key and said face plate hav
ing cooperative stop means, one on the handle of said
key, the other projecting from said face plate to limit the
turning of said key in said lock.
10. The device of claim 9 wherein the depth of said
box is twice the length of said key shank, so that a broken
key shank can be pushed out the rear of said lock by an
other key.
11. A key-operated electric switch assembly and
mounting, including in combination: a housing having a
front wall with a hole therethrough; a face plate on the
substantially the same height thereas and extending from
adjacent said faceplate to a point spaced from the guide
pin closest to said faceplate; a plurality of electric switches
in series with each other and operated by radially out
said hole and having a central opening and a slot ex
hole, said keyshank having an axially extending groove
projecting radially into said keyhole, a plurality of sta
front of said front wall surrounding and extending into
tending radially from said slot on the rear of said plate;
a lock body in said housing behind said front wall in
line with said central opening, having a keyhole with an
ward movement of switch plungers, so that all said
switches must be closed for operation of the series ar
inlet end and a rear end, both de?ned by projecting an
rangement thereof; and a key, comprising a handle and 65 nular rims, the rim of said inlet end ?tting snugly in the
a generally cylindrical shank connected to said handle at
opening of said face plate, a plurality of axially aligned
one end and having a free end and insertable in said key
radially movable spring~mounted switch plungers normally
tionary guide pins axially aligned with said switch plun
open at said free end and stopped near said handle end,
with a bottom axial wall, a radial ‘wall on one side of said 70 gers, one closely adjacent each said switch plunger,
bottom wall and on the other side a series of sectors com
between said switch plunger and said inlet end and pro
prising stop bands defined by an axial wall, cams
jecting radially into said keyhole for preventing picking
de?ned by cylindrical segment of smoothly increasing
of said lock, and a keyway comprising an elongated flat
member axially aligned with said plungers and guide pins
radius leading from the groove bottom wall out to
the full radius of said shank, and slots with a bot 75 and projecting radially into said keyhole at said inlet end
3,059,069
10
and projecting axially from said inlet end into the slot of
said face plate; studs projecting rearwardly from said face
plate through said front wall; washers and bolts on said
studs tightening said face plate to said front wall; a rear
plate ?tting around the rear rim and against said body;
end and a rear end, both de?ned by projecting annular
rims, the rim of said inlet end ?tting snugly in the open
ing of said face plate, and a keyway comprising an elon
gated ?at member projecting radially into said keyhole
an electrical circuit; a plurality of electric switches in said
at said inlet end and projecting axially from said inlet
end into the slot of said face plate; studs projecting rear~
circuit in series with each other, each operated by radially
wardly from said face plate through said front Wall;
outward movement of one said switch plunger, all said
switches having to be closed before electrical current can
washers and bolts on said studs tightening said face plate
to said front wall; and a rear plate ?tting around the rear
?ow through said circuit.
10 rim and against said body.
12. A key-operated electric switch assembly and mount
References Cited in the ?le of this patent
ing, including in combination: a housing having a
front wall with a hole therethrough; a face plate on the
front of said front wall surrounding and extending into
said hole and having a central opening and a slot extend 15
ing radially from said slot on the rear of said plate; a
lock body in said housing behind said front wall in line
with said central opening, having a keyhole with an inlet
UNITED STATES PATENTS
2,080,684
2,602,85'1
Zalkind ______________ __ Mar. 18, 1937
Barton ________________ __ June 8, 1952
2,637,844
Thompson ___________ __ May 15, 1953
2,909,761
Rockola ___.,__.,____,_,__.__j_ Oct. 20, 1959
Документ
Категория
Без категории
Просмотров
0
Размер файла
992 Кб
Теги
1/--страниц
Пожаловаться на содержимое документа