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Патент USA US3093932

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June 18, 1963
Filed April 24, 1961
3 Sheets-Sheet 1
June 18, 1963
Filed April 24, 1961
5 Sheets-Sheet 2
(vgéww? W
June 18, 1963
J. T. NY
Filed April 24, 1961
5 Sheets-Sheet 5
United States Patent 0 ” "ice
Jessie T. Ivy, 523 Henderson St., Seattle, Wash.
Filed Apr. 24, 1961, Ser. No. 105,228
6 Claims. (Cl. 42-62)
This invention relates to revolvers and has reference
more particularly to certain improved features of revolver
construction that are related either directly or indirectly
to the cylinder of the revolver; this application being a
continuation-in-part of my US. application ?led on Au
Patented June 18, 1963
FIG. 4 is an end view of the present cylinder, as seen
from its loading end.
FIG. 5 is a longitudinal section of the cylinder, taken
on line 5—5 in FIG. 4.
FIG. 6 is a fragmental side view of parts of the revolver,
showing the cartridge ?ring hammer in down position.
FIG. 7 is a sectional detail on line 7--7 in FIG. ‘6,
showing the cylinder indexing pawl and the cylinder in
dexing ratchet gear.
FIG. 8 is an enlargement of the indexing pawl and
ratchet as seen in FIG. 7.
FIG. 9 is an enlarged section taken on line 9—-9 of
FIG. 6.
gust 3, 195‘9, under Serial No. 831,288, now Patent No.
FIG. 10 is a fragmental section of a part of the cylinder
3,030,723, entitled Revolver With Full and Semi-Auto
matic Action.
15 showing the extractor disk as adapted for use of auto
matic type cartridges therewith.
Furthermore, the present invention is concerned with
FIG. 11 is an exploded view showing in perspective,
the parts constituting the frame structure or applied
‘automatically cocking the hammer incident to the ?ring
FIG. 12 is a view, partly in section, showing a revolver
of each cartridge and with means for forwardly indexing 20
with an alternative type of cylinder mounting shaft; this
the cylinder as the hammer is cocked.
shaft being tubular and containing a spring loaded push
It is one of the primary objects of this invention to
rod designed to be moved by gas pressure through the
provide a revolver with improved mountings for the cylin
cylinder to cock the hammer and to then be returned to
der trunnions to permit it to be more readily removed for
reloading and then easily replaced ‘and secured in its 25 normal position by the spring pressure.
Referring more in detail to the drawings:
The improvements of the present invention are herein
Another object of the invention is ‘to provide improved
illustrated in FIG. 1 as embodied in the revolver disclosed
latching means for yieldably retaining the cylinder trun
in my prior application above mentioned, but are not
nions in their mountings but permitting their ready dis
30 necessarily restricted thereto. The revolver herein shown
placement for removal and reloading of the cylinder.
is designated ‘in its entirety by reference numeral 10. It
Further objects and advantages of the present invention
comprises the usual frame structure, having a main body
reside in the provision of a readily removable cylinder,
portion 10a with which a handle or grip portion 10g is
having two concentric and circularly arranged rows of
formed. At its forward end the frame 10 mounts two
cartridge chambers, with chambers of ‘the different rows
revolvers that may have one or two separate barrels or a
double bored barrel; that may be equipped with means for
disposed in staggered arrangement; in the provision ‘of 35 separate barrels, 11 ‘and 12, extending forwardly from the
frame in side by side relationship. The main body por
tion of the frame is formed with the usual rectangular
of the cylinder mounting trunnion forming shaft, designed
opening 10x in which the present cartridge cylinder 15,
to coact with a spring means whereby accuracy in index
embodying the improvements of this invention is remov
ing is insured; and to provide that the trunnion forming
shaft may also be used for a quick and easy ejection of 40 ably mounted by an axially contained mounting shaft 16,
?attened indexing surfaces on one of the end portions
cartridges or empty cases from the cylinder after it has
been removed from the revolver frame.
Another object of the invention is to provide a revolver
as seen in FIG. 5, or by the tubular shaft of FIG. 12,
each of which will be presently fully described.
The ?ring of cartridges in the revolver is eifected in
the usual way by the action of a spring loaded hammer
‘cylinder with certain notches, slots and sockets, with
which especially designed spring latches coact, .to prevent 45 17 which is released from its cocked position, as seen in
FIG. 2, for ?ring by a trigger mechanism, preferably that
{any possibility of incorrect ‘cylinder indexing.
shown in FIG. 2 to include the usual trigger 18 that has
Further objects and advantages of the invention reside
its ?nger pull portion 18' protectively contained in a trig
in the ‘details of construction of the various parts associ
ger guard 19 that is formed with the frame 10. It is fur
ated with the cylinder and in their relationship, combina
tion and mode of operation, as will hereinafter be de
ln accomplishing the above mentioned and other ob
jects of the invention, I have provided the improved de
ther to be understood that the frame 10 is equipped with
opposite side plates 22 and 23, best shown in FIGS. 3
and 11, wherein it is also to be observed that the front
‘and rear end walls of the cylinder containing opening 10x
tails of construction, the preferred forms of which are 55 are formed with laterally opening seats 24 and 25 that are
so designed as to receive and rotatably contain therein the
opposite end portions of the cylinder mounting shaft 16,
FIG. 1 is a side view of a revolver embodying the im
where they serve as trunnion supports.
provements of the present invention therein, with parts
It has also been shown in FIG. 5 that the cylinder 15
broken away or removed, for explanatory purposes.
illustrated in the accompanying drawings, wherein:
FIG. 2 is an enlargement of the cylinder and cylinder
containing portion of the revolver frame, with the near
side cover plate of the hand grip portion of the frame
is slidably keyed to shaft 16 by means presently described,
and that the shaft ends extend beyond the ends of the
cylinder as cylinder supporting trunnions, one of which
is formed circumferentially thereof, at regular angular
intervals, corresponding to the spacing of chambers in
FIG. 3 is a vertical cross-section taken on line 3-3
the cylinder, with ?attened surfaces, as at 16)‘ in FIG. 5,
65 for a purpose presently to be explained.
in FIG. 1.
Keyed on the rear end portion of shaft 16 closely adja
cent the rear end surface of‘ the cylinder, is the cylinder
indexing ratchet wheel or gear 26.
The surface of the
rear end Wall member of the cylinder recess 19x is addi
tionally recessed, as at 10z in FIG. 11 as is also the side
plate 23 as at 23z in FIG. 3, to accommodate this index
cylinder indexing gear wheel 26 to the shaft 16 and holds
it ?rmly against the outer face of the extractor disk 40
when the cylinder is mounted on the frame.
Normally, that is, when the revolver is loaded and
ready for ?ring, the frame ‘10, cylinder 15 and its mount
ing shaft 16 are in the relationship shown in FIG. 2, and
ing gear in the removal from or replacement of the cylin
the end trunnions of the shaft 16 are seated in the frame
der in the frame recess 10x and to adapt the cover plate
seats 274-25 provided therefor. To displace the cylinder
for containing the indexing pawl as shown in FIGS. 2
from the frame for loading or for the unloading of car
and 7. It is further to be understood by reference to FIG. 10 tridges or cases therefrom, it is pushed laterally from its
normal position of FIG. 3 to or beyond the dashline
11 that the trunnion seats 24' and 25 as provided, in the
position in that same view. Empty or full cartridges may
frame, open laterally to the left side of the frame through
then readily be extracted from the cylinder chambers by
rather elongated passages 2.7-2.7 formed in the side
holding the cylinder in the hand and actuating the shaft
plate 22 as applied to that side of the frame; these pas.
sages being slightly ?ared toward their outer end portions 15 16 rearwardly therein as shown in dash lines in FIG. 5,
thus to shift the extraction disk 40‘ from the cylinder and
as shown in FIG. 3 to more readily receive the trunnions
mountings of the cylinder as it is. applied to the frame.
cause" it, by reason of this movement and its peripheral
When the cylinder is properly positioned, its trunnion
holding contact with the rim ?anges of the cartridge cases
supponts rest rotatably in the seats 24 and 25 provided
then in the cylinder to extract them from the cylinder.
for them where they are yieldably held against displace 20 The shaft 16 is shown in FIG. 5 as having a keyway 42’
extended therealong and the inner end of a set screw 42s
ment by leaf springs 28-28 applied as in FIG. 3; which
threaded into the cylinder protrudes into this keyway to
springs are shown to be mounted in recesses 29-—29
prevent the shaft 16 and the disk 40 from rotating in the
formed in the bottom walls of the channels 27—27 as
provided in the side plate, and which lead inwardly to
cylinder and to act as a limiting stop for shaft movement.
the trunnion seats. Each leaf spring 28 is riveted or 25 This extracting operation, as illustrated, shows that the
otherwise suitably ?xed at its outer end against displace
disk or plate 40 has been displaced to the left. Extraction
ment, and it is formed‘ at its inner end with a down-turned
is most eifectively accomplished by holding the cylinder
shoulder forming portion 30.
and striking the shaft 116 on its forward end to drive it
The inner portions of
rearwardly. After extraction, the disk or plate 49 is
inwardly therealong to their seated positions and will then
merely pressed back into the recess 40r, the cylinder
snapout to trunnion holding position as shown in FIG.
chambers reloaded, and then the cylinder is replaced in
3. The latch, as provided by each spring, will be auto
the frame opposite to its direction of removal.
matically depressed, by the downward cam-like pressure
The cartridges of either caliber, as loaded in the cyl
of the corresponding trunnion thereagainst when such
inder, are adapted to be selectively ?red in the revolver
pressure is manually applied against the cylinder to push 35 by the action of the hammer 17 which has a pin striking
head block 47 that is adjustable to positions for selective
it from position. However, under normal handling con
ly striking ?ring pins 43 or 43’ which are mounted in
ditions, these spring latches so engage the seated trunnions
as to hold the cylinder 15 properly in its functional posi
proper positions in the rear end portion of the cylinder
mounting frame, to accommodate the position of car
tion in the frame.
The cylinder 15 is shown-in FIG. 4 to be formed, in 40 tridges of different calibers. The hammer ‘17, is as best
shown in FIGS. 2 and 6. It comprises an inner end
the usual circular arrangement, with ?ve cartridge holding
mounting hub or tumbler portion 17a substantially of
chambers 31 for cartridges of the same caliber, and is
cylindrical disk-like form and at its outer end is formed
also formed outside the ?rst circular row with a second
With a head 17h. A pivot shaft 44 extends axially
circular row containing a like number of chambers 32
for cartridges which may or may not be of lesser'caliber. 45 through the tumbler portion 17a and mounts the hammer
in the frame for its required swinging action. The por
For example, the chambers 31 may receive .44 caliber
tion 17a is contained in a recess 45 formed in the frame
cartridges and the chambers 32'receive .22v caliber car
‘and the end portions of the pivot shaft 44 are rotatably
tridges. Preferably the chamber arrangement in the cyl
contained in sockets provided therefor in parts of or parts
inder is as in FIG. 4 which show the chambers of the
two rows to be for cartridges of different calibers and to 50 applied to the frame 10.
Movably mounted on the striking face of the hammer
be in staggered relationship.
head 17h, as best shown in FIGS. 6 and 7 is the ?ring pin
The two barrels Ill and 12 with which the present re
striking block 47. This is shown to be pivotally mounted
volver is shown to be equipped have‘ their inner end por
by a pivot pin 48 applied through itsupper end‘ portion
tions reduced in diameter and shouldered and ?tted in
bores 11b and 12b provided therefor, respectively, in the 55 as in FIG. 7, to permit the lower end portion of the block
to be adjusted to the full, line position of FIG. 7, for
forward end of the frame 10a and side plate 23. The
striking against the ?ring pin 43 that is set in the frame in
chambers 31 and 32 of the cylinder are adapted, respec
position to ?re cartridges in the outer circle of chambers,
tively, to be successively registered with the inner ends
or to be adjusted to its dash line position in that same
of these two barrels by the successive indexing movements
of the cylinder. The speci?c manner of making, assem 60 view to strike the ?ring pin 43’ that is set in the frame
in position for the ?ring of the cartridges of the inside
bling and securing the barrels to the frame is not a part
circle of chambers.
of this invention and will not be further explained. How
The ?ring pins are spring loaded for retraction and
ever, it is to be noted that each is bored and ri?ed as
are mounted in the frame bores 43x and 43y and may
required to best accommodate the cartridges used.
It is also to be observed by reference to FIGS. 4 and 65 be of the usual form. Each ?ring pin has a projecting
head end portion at its outer end that is adapted to be
5, that an- extractor plate 40 of disk form is seated in a
these springs will be depressed as the trunnions are moved
recess 40r provided therefor coaxially within the rear end
struck by the hammer block 47 when the hammer is re
leased for ?ring, and an extended ?ring pin point at its
inner end which strikes the cartridge. The positioning
chambers 31 and 32 and is so peripherally notched as to 70 of the hammer head for selective ?ring of cartridges of
diiferent caliber is manually effected. At one of its po
receive therein certain peripheral rim portions of the car
sitions, the head will strike the pin 43. At another it
tridges of both calibers as applied to their respective
will strike the pin 43’ and at an intermediate position it
chambers of the cylinder, as seen in FIG. 4. This disk
is ?xed on the cylinder mounting shaft 16 by means of a
will be positioned to strike both pins. Block positioning
key 42 shown in FIG. 5 which key also ?xes the’ small
is manually effected by thumb pressure applied laterally
surface of the cylinder 15. This disk is of such diameter
and is bored with holes registering with the cartridge
thereto and the block will be yieldably held at any set
the trigger has a pivotal connection at 93 with a hori
position of adjustment by a spring pressed ball latch 50
zontally disposed lever 92. Lever 92 has a rear portion
as shown in FIG. 9 wherein it is seen to be mounted in
that extends substantially horizontally and rearwardly
in the frame from pivot point 93 and at its rear end is
the striking block and is adapted to be seated in any one
formed with an upturned hook 94 that is adapted under
of a series of three notches 51 formed in the face of the
certain conditions, with the hammer down, to be engaged
hammer head over which the block is mounted, to retain
with the shoulder 74 of the hammer mounting tumbler
it in a selected position.
portion 17a. At its forward end, lever 92 has a rounded
The cocking of the hammer, as effected either manual
knob 92k adapted for sliding movement during trigger
ly with the thumb or automatically, effects an auto
matic forward indexing of the cylinder 15 through the 10 pull, on the upwardly inclined forward end de?ning
surface of slot 90. Normally, the hammer 117, when
action of a pawl and ratchet mechanism that has been
“down” is in the position of FIG. 6, and the trigger ac
shown in FIGS. 2, 6 and 7 wherein it is seen that a pawl
tuated lever 92 with the hook 94 at its rearward end will
actuating link 60 is pivotally ?xed as at 61 to the lower
then be so positioned that the book 94 will be engaged with
forward edge portion of the hub or tumbler portion
the shoulder 74 of the parts 17a with initial trigger pull.
17a of the hammer 17 to extend forwardly therefrom and
at its upper end this link has a spring pressed pawl '67
pivoted thereto and extended into ratcheting contact with
When the trigger is pulled rearwardly from normal posi
tionfor the manual cocking of the hammer, the lever’
92 is pulled forwardly to engage hook 94 with shoulder
the ratchet gear 26 ?xed on pin 16. This relationship
74 and by continuing trigger pull, it rotates the hammer
of parts provides that when the hammer is swung rear
wardly from position of FIG. 6 to that of FIG. 2 for 20 counter clockwise to its cocked position, as in FIG. 1.
The safety latch stop 85 having previously been released
cocking, the pawl 67 engages the ratchet wheel 26 and
from the sear by the user tightly grasping the revolver
rotates it as required to advance the cylinder 15 one
handle and the sear lever 68’ having been rocked by
interval. It is shown also in FIGS. ‘1 and ‘2, that a sear
spring 72 into the hammer latching position as in FIG.
68 is provided for latching the hammer when moved to
cocked position. The scar is shown to be located in the 25 1, it will be understood that continuing trigger pull moves
the trigger from its normal position shown in dash lines
upper part of the hollow grip frame at the rearward edge
at 18a in FIG. 2 to the full line position where it engages
of the mounting end of the hammer. It is shown best
the forward end of a scar actuating pin 95 that is mount
in FIG. 6 to comprise a slightly upwardly curved for
ed for endwise sliding action in a bore 95' of the frame
wardly extending lever arm portion 68’ that is pivoted
in the frame between its ends by a pin 69 and is provided 30 with its rear end positioned to engage the lower end of the
wing portion of the sear. Thus, when the trigger is pulled
at its rear end with an upwardly and forwardly directed
to its limit, the sear lever 68' will be rocked by the pin
latch tooth 70 and downwardly and rearwardly directed
95 in such manner as to displace its forward end ?rom
wing 71 against which a coil spring 72 bears to urge the
holding engagement with the stop shoulder 74 of the
ment with the lower periphery of the mounting tumbler 35 hammer mounting tumbler portion 17a thus to release the
hammer for ?ring.
portion 17a of the hammer. This tumbler portion of
Oocking of the hammer can be done manually either
the hammer is also formed on its lower periphery with
by thumbing of the hammer rearwardly or by trigger
two latch engaging shoulders 73 and 74 at about 90°
pull as above described. However, when it is to be done
spacing. When the hammer 17 is down, the normal po
forward end of this lever arm 68’ into or toward engage
sition of the sear 68, relative to the hammer is as shown
by trigger pull the user ?rst pushes the trigger forwardly
in FIG. 6. With the cocking of the hammer, either by
from its normal dash line position 18a of FIG. 2 to the
dash line position 18b. This causes the rear end portion
of lever 92 which is upwardly spring pressed to be posi
tioned to engage the hook 94 with the shoulder 74. Then,
thumb or by any automatic means, the tumbler portion
17a rotates counter clockwise from position of FIG. 6,
to position of FIG. 1, but the sear does not move to
hammer latching position unless preceded by release of 45 with the continuing trigger pull, the hammer, is caused
the previously mentioned safety latch mechanism as con
to rotate rearwardly to its cocked position for latching the
tained in the hand grip. If the hand grip safety latch
sear lever 68' with shoulder 74 as in FIG. 1 as trigger
has been released, then the sear lever arm 68' is actuated
to position of FIG. 1 to cause lever arm 68' to engage
pull is relieved.
When the hammer cocking operation is to be effected
stop 74 to hold the hammer in cocked position, until
automatically as, for example, by a gas actuated means,
the cocking rotation of the hammer is effected through a
released for ?ring by trigger pull as later explained.
a horizontally disposed latch bar 111 which at its rear
The safety latch above mentioned is seen in FIG. 1 to
be contained in the grip portion of the revolver. It
ward end has pivotal connection, as at 112, with the
lower peripheral edge of the hammer mounting tumbler
comprises a lever member 89 that is pivoted at its lower
end in a seat 81 in the bottom member of the frame 55 portion 17a. This bar is connected at its forward end to
a pull rod 109 of the automatic mechanism. When a car
portion of the grip. The upper end portion of lever
tridge is ?red, the gas of detonation in the barrel acts
80'is widened to provide a sort of fin 33 that projects
through means not herein disclosed in detail to act
outwardly through a slot 84 formed in the back edge of
through a cable ‘106 and rod ‘109 to pull the latch plate
the frame member. The upper end portion of the lever
80 is normally positioned in such manner that a stop por 60 111 forwardly to cock the hammer and cause it to be
latched by the sear 68 as has been shown in ‘FIG. 2.
tion 85 thereof at its upper end, will engage against the
It is to be understood that the movement of the plate
lower edge of the wing 71 of the sear thus to hold the
sear arm 68' against movement.
However, when the
111 is the same with either manual or automatic ham
mer cooking and therefore the gas operated, or automatic
revolver user tightly grasps the handle grip preparatory
to ?ring, he automatically presses the ?n 83 and lever 65 cocking means has not been shown in detail as it was dis
80 inwardly against the yielding pressure of a coiled
closed in the parent application. When the hammer is re
spring 86 contained in the handle and, thus displaces the
leased for ?ring, by trigger pull, and the pull is retained
stop portion 85 of the lever 80 from the sear so that the
by pressure of pin 95 against the sear 68, the sear tooth
sear lever arm 68' will snap under pressure of spring 72
70 will snap over the hammer shoulder 73 and it then
70 becomes necessary that the trigger pull be momentarily
The trigger, which controls ?ring, is designated by nu
released to allow the sear, under pressure of spring 72, to
meral 18 and it is shown to be of the usual form, with a
resume its hammer holding position of FIG. 1 and then,
to hold the hammer in position of FIG. 1.
?nger hold portion 18' disposed in the usual trigger guard
whenever the user is ready he can release the sear by
with its upper end portion extended through a frame slot
means of trigger pull to ?re the next shot.
90 and pivoted in the slot at 91. At its upper end 75
It has been shown in FIGS. 1 and 2 that the rearward
extent of hammer travel; oan; be selectively limited at
predetermined points thus, to provide either for semi
automatic operation or- full; automatic operation, respec
tively; this being effected by,- the; adjustment of a stop
which. near its forward end, has a port 23%) opening
therefrom into the revolver barrel. Fitted in this tube
225>is a piston 231 which has a rod 231’ extended rear
latch plate 1130 that is pivotally mounted on the top of the
wardly therefrom through a bushing 232 and continues
into abutment with rod 244mounted‘ axially in tube 2-18‘.
frame, immediately back of the hammer position. This
Acoiled- spring Milis retained. under compression in the
tube 225 to urge the piston 231 to its forward limit of
travel against- aplug- 241 that closes the forward end of’
the tube.
manually ‘adjusting the stop between its two positions.
Slida'bly mounted in the rearward. end portion of tube
In one position a shoulder .133 at the forward end of the 10
latch acts ‘as a stop for limiting rearward swing of the
213, for endwise movement, is a small diameter push
latch, as shown in \FIG. 2 is. pivoted on the frame by a‘
screw 131 and has ‘a thumb ?ange 132 at its rear end for
rod 244. This is slidable in a bushing 245 that closes the
rear end of tube ‘218. This rod engages at its forward
70 can be engaged by the hammer shoulder 73. In its
end with the rear end of a similar rod 231’. At its rear
other position, the latch permits a farther rearward swing
of the hammer, and the latching of the sear tooth '70 .over 15 end rod 24.4. extends slightly beyond bushing 245 into
cocking contact with hammer 17. A coiled spring 247
the hammer tooth shoulder 73 takes place as shown in
contained in tube 218 acts against a collar 248'?xed on
FIG. 2, when trigger is pulled to and held rearwardly.
rod 244- to urgethe rod forwardly. When a cartridge
‘In FIG. 2, it is shown that a recoil plate 145 is ?xed
is ?red, gas pressure propelling the bullet through the
transversely of the rear end member of the frame 10a
that de?nes the rear end of the cylinder containing open 20 barrel, passes through port 239‘ and drives the piston 231
rearwardly. This acts through rods 231’ and 244. to
ing ‘10x. This plate is shown to be set in a recess formed
swing the hammer 1-7 to its latched and cocked position.
just above the position of the indexing ratchet 26. It has
Its control and operation otherwise may be as in the
holes bored through its opopsite end portions to receive
revolver previously described. Tube and rod lengths are
screws for attachment of the opposite side plates 22‘ and.
23, and also is bored for the mounting of the two ?ring 25 so established that when no gas pressure is being ex
hammer at a positionjshort of that at which the sear tooth
pins 43-43’ previously described.
In order to insure proper and exact indexing of the
erted against piston 231, the cylinder 15a can be readily
lifted out of the frame as previously explained.
In the event that a cylinder is designed to accommo-v
date cartridges of substantial lengths in its larger cham—
plate ‘111 as attached to the hammer is formed on its
top edge with an upwardly extending ?ange or ?n 1111' 30 bers, the smaller chambers could be formed with ri?ings
as shown in FIG. 5, thus making it unnecessary to employ
and the rear peripheral edge of the cylinder 15 is
cylinder 12, it is shown, in FIGS. 2 and 6 that the latch
formed in accordance with the degree of angular spacing
of cartridge chambers with indexing notches 168. With
each forward movement of plate vIll-1 that is incident to
hammer cocking, whether manually or automatically,
the ?ange ill-l’ enters one of the notches 168- thus to ac
curately register the cylinder bore containing the cartridge
next to be ?red, with, the proper barrel-and ?ring pin.
To supplement this above described cylinder registra
tion means, I also employ a leaf spring 170‘ that is
mounted in the frame 10‘ to press yieldingly against the
?attened end surf-aces 16)‘ of the forward end portion of
the cylinder mounting shaft 16- as- contained in seat 25.
This spring is ?attened and presses yieldingly against the
the smaller barrel for the cartridges ?red in them, or at
least such ri?ed chambers. add to the effect of the ri?ed
What I claim to be new is:
l. A revolver comprising. a main frame formed with
an- opening therethrough and having laterally opening
seats formed in the opposite end Wall surfaces of said
opening, a chambered cartridge cylinder removably
mounted by said main frame in said opening; said cyl
inder having coaxial supporting trunnions at its, opposite
ends,‘ rotatably contained in said seats for its‘ functional
support, a side plate applied to said frame, providedwith
an opening through which the cylinder is applicable to
shaft 16 to assist in locating thecylinder at the exact regis 45 and removable from. the main frame opening, and a pair
of leaf springs ?xed at their outer ends to said side plate
tration or indexing point. Its location in the-frame is
and formed. at their inner ends with shoulders designed to
shown best in FIGS; 2 and 5.
normally holdingly engage said supporting trunnions of
As a safety means to prevent ?ring in the event that
the cartridge cylinder to yieldingly retain the cylinder
the cylinder is not in proper registration, I employ a latch
against displacement from the frame opening.
of bell-crank or angular lever form, designated" in dash
2. The revolver of claim 1 wherein the opening as pro?
lines at 174 in FIG. 6. This lever, has a horizontal arm
vided in said side plate is formed in the opposite end walls
176v that overlies the rear top surface of the cylinder 15
thereof with channels in which the cylinder mounting
and a vertical arm 177 at the rear end of the cylinder.
trunnions may be received for guidance in their move“
Arm 177 is pivoted in- the frame It!‘ at its lower end as
at 178. The arm 176 is formed'at its forward end with 55 ment into and from said seats, and wherein said leaf
a downwardly projecting point 179‘ adapted to enter, socket
springs are ?xedly mounted in said channels, and are
180v formed at predetermined points in the cylinder when
the chamber next to be ?red is in exact registration with
the proper barrel. If the cylinder is not exactly indexed,
yielda‘ole for disengaging said shoulders from holding
relationship with said trunnions.
3. The revolver of claim 1 wherein one of the cylinder
then the angular lever 1'74which is located in the line of 60 mounting trunnions is formed circumferentially thereof
striking travel of the hammer head 1711 will act as a stop
with ?attened surfaces at intervals of angular spacing cor
to prevent the hammer head block striking the firing pin
or pins.
Various parts of the revolver are subject to modi?cation
responding to the angular spacing of the cartridge cham
bers of the cylinder, and a leaf spring is ?xed in the main
without departure from the spirit of the invention dis 65 frame to yieldingly bear against said surfaces to facilitate
accurate indexing of the cylinder in its rotative indexing
closed. For example, in FIG. 12, I have illustrated an
alternative mounting for thecylinder, as Well as an al
ternative mode of use of gas pressure for cylinder index
4. The revolver of claim 1 wherein said cartridge cyl
inder is provided with a mounting shaft extended coaxially
ing and hammer cocking. In this view the cylinder 15a
is rotatably mounted by a trunnion providing tubular 70 therethrough and having a keyed connection therewith
and which shaft has its opposite end portions extended be
shaft #218 which corresponds to the shaft 16 of FIGS. 1
yond the end surfaces‘of the cylinder thus to serve as
and 2. When the cylinder is in proper position in the
its mounting trunnions.
frame, this tubular shaft axially aligns with a tube of like
5. The revolver of claim 4 wherein the cylinder is
character, designated at 225 which is ?xedly mounted in
the revolver frame along the underside of the barrel and 75 equipped at one end with a cartridge extraction disk with
?xed mounting on one end of said shaft and which disk
is adapted to be functionally actuated for cartridge ex
traction by an endwise actuation of the shaft relative to
the cylinder.
6. The revolver of claim 5 wherein a cylinder indexing
gear is ?xed to said shaft and an indexing pawl coacts with
the gear and is operable incident to the trigger coacting
operation after each ?ring.
References Cited in the ?le of this patent
Du Bose ____________ __ Dec. 21,
Rodehaver ___________ .._ Oct. 22,
Vosrnek ______________ -_ Dec. 2,
Dickinson ____________ __ Dec. 8,
Kelly ______________ __ Sept. 14,
Kauch _______________ __ July 10,
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