IMPROTEMPS TV Lozeman
Year: 1865

page_text: LETTERS PATENT to John Parker Lindsay, of the City and County of
New Haven, State of Connecticut, United States of America, for the
Invention of "IMPROTEMPS TV Lozeman The
PROVISIONAL SPECIFICATION left by the said John Parker Lindsay at
the Office of the Commissioners of Patents, with his Petition, on the
9th February 1865.
I, JOHN PARKER LINDSAY, of the City and County of Newhaven, State
of Connecticut, United States of America, do hereby declare the nature of
the said Invention for "IMPROVEMENTS IN LOCKS FOR FIRE-ARMS," to be as
follows:-
In the accompanying Drawings Fig. 1 is a side view of a complete lock;
Fig. 2, the same view with side of frame removed, and both hammers set at
full cock; Fig. 8 the same view as Fig. 2 with the right-hand hammer dis-
charged; Fig. 4 a top view; and Fig. 5 a partial front end view. Similar
letters indicate like parts.
The object of my Invention is to combine two hammers so as to be
operated by one trigger, and so that but one hammer can be discharged by a
single pull upon the trigger. And my Invention consists in the use of a

page_text: detent which is operated by one of the hammers so as to arrest the trigger
after it has discharged the first hammer, and prevent its action on the sere of
the second hammer to discharge it (the second hammer) until the trigger
has been released after discharging the first hammer, which discharge and
release releases the trigger from the action of the detent, when by again
pulling the trigger the second sere will be operated upon so as to discharge
the second hammer.
A is the frame of the lock in which the hammers B and C, and their
operative mechanism are placed; B is the right-hand hammer; C, the left-
hand hammer hung on a pivot at d, see Figs. 4 and 5, with the mainspring s.
a, b, are the seres, see Fig. 5, hung upon a fulcrum f; c are sere springs to
force the seres into the notches of the tumblers D. E is the trigger hung
between the two seres upon the same fulcrum f; the rear end of the right-
hand sere a is longer than the left-hand sere b, so that the trigger will come
in contact first with the right-hand sere; I is a detent hung upon a fulcrum i,
its rear end pressed up by a spring n; the rear end of the detent is forced
down from the position in blue to that in black, Fig. 8, by the act of cocking
the right-hand hammer B, and is held in the position in black, also see Fig. 2,
by the said right-hand hammer B, the left-hand hammer having no effect
whatever upon the detent. Both hammers being cocked as in Fig. 2, draw
the trigger to discharge the first hammer (the right-hand) B, and a notch a
on the trigger will strike the detent as in black, Fig. 8, the hammer B is
discharged, but the detent is held down the trigger, and prevents the
trigger from being drawn back any further, which it must be before it can
discharge the other hammer C, therefore release the trigger, and allow it to
be forced forward the pressure of the detent upon it to its original position
in Figs. 1 and 2, and in red, Fig. 3. The detent will be released from the
action of the trigger, and will fly up as denoted in blue, Fig. 3; now it is out
of the way of the trigger, which may be again pulled back, and this time far
enough to act upon the sere 6, and discharge the second hammer C, thus but
one charge can be ignited at one time.
I have represented the right-hand hammer as being first discharged, this
is not essential, as the arrangement may be reversed, and the left-hand hammer
first discharged. Or either one of the hammers may be used singly, the other
being down.

page_text: SPECIFICATION in pursuance of the conditions of the Letters Patent, filed
by the said John Parker Lindsay in the Great Seal Patent Office
on the 9th August 1865.
TO ALL TO WHOM THESE PRESENTS SHALL COME, I, JOHN
PARKER LINDSAY, of the City and County of New Haven, State of Connecticut,
United States of America, send greeting.
WHEREAS Her most Excellent Majesty Queen Victoria, by Her Letters
Patent, bearing date the Ninth day of February, in the year of our Lord
One thousand eight hundred and sixty-five, in the twenty-eighth year of
Her reign, did, for Herself, Her heirs and successors, give and grant unto
me, the said John Parker Lindsay, Her special licence that I, the said John
Parker Lindsay, my executors, administrators, and assigns, or such others as
I, the said John Parker Lindsay, my executors, administrators, and assigns,
should at any time agree with, and no others, from time to time and at all
times thereafter during the term therein expressed, should and lawfully might
make, use, exercise, and vend, within the United Kingdom of Great Britain
and Ireland, the Channel Islands, and Isle of Man, an Invention for
"IMPROVEMENTS IN LOCKS FOR FIRE-ARMS," upon the condition (amongst others)
that I, the said John Parker Lindsay, my executors or administrators, by
an instrument in writing under my, or their, or one of their hands and seals,
should particularly describe and ascertain the nature of the said Invention,
and in what manner the same was to be performed, and cause the same to
be filed in the Great Seal Patent Office within six calendar months next
and immediately after the date of the said Letters Patent..
NOW KNOW YE, that I, the said John Parker Lindsay,, do hereby
declare the nature of my said Invention, and in what manner the same is to
be performed, to be particularly described and ascertained in, and by the
following statement (that is to say) :-
In the accompanying Drawings Figure 1 is a side view of a complete lock;
Figure 2, the same view with the side of the frame removed, and both
hammers set at full cock; Figure 3 is the same view as Figure 2, the right-
hand hammer being discharged; Figure 4 a top view; and Figure 5 a partial
front end view. Similar letters indicate like parts.
The object of my Invention is to combine two hammers so as to be operated
by one trigger, and so that but one hammer can be discharged by a single pull

page_text: upon the trigger; and my Invention consists in the use of a detent, which is
operated by one of the hammers, so as to arrest the trigger after it has dis-
charged the first hammer, and prevent its action on the sere of the second
hammer to discharge it (the second hammer) until the trigger has been
released after discharging the first hammer, which discharge and release
releases the trigger from the action of the detent, when by again pulling the
trigger the second sere will be operated upon so as to discharge the second
hammer.
A is the frame of the lock, in which the hammers B and C, and their
operative mechanism are placed; B is the right-hand hammer; C, the left-
hand hammer hung on a pivot at d, see Figures 4 and 5, with the main
spring 8.
a, b, are the seres, see Figure 5, hung upon a fulcrum; f, c, are sere
springs to force the seres into the notches of the tumblers D; E is the trigger
hung between the two seres upon the same fulcrum f; the rear end of the
right-hand sere a is longer than the left-hand sere b, so that the trigger will
come in contact first with the right-hand sere; I is a detent hung upon a
fulcrum i, its rear end pressed up by a spring n. The rear end of the detent
is forced down from the position in blue to that in black, Figure 3, by the act
of cocking the right-hand hammer B, and is held in the position in black, also
see Figure 2, by the said right hammer B, the left-hand hammer having
no effect whatever upon the detent. Both hammers being cocked, as in
Figure 2, draw the trigger to discharge the first hammer (the right-hand) B,
and a notch on the trigger will strike the detent as in black, Figure 3; the
hammer B is discharged, but the detent is held down by the trigger, and
prevents the trigger from being drawn back any farther, which it must be
before it can discharge the other hammer C, therefore release the trigger and
allow it to be forced forward by the pressure of the detent upon it to its
original position in Figures 1 and 2, and in red, Figure 3. The detent will
be released from the action of the trigger and will fly up, as denoted in blue,
Figure 3; now it is out of the way of the trigger, which may be again pulled
back, and this time far enough to act upon the sere b, and discharge the
second hammer C; thus but one charge can be ignited at one time."
I have represented the right-hand hammer as being first discharged, this is
not essential, as the arrangement may be reversed, and the left-hand hammer
first discharged; or either one of the hammers may be used singly, the other
being down.
What I claim as my Invention is, the use of the detent in combination

page_text: with the hammer and trigger, when constructed, combined, and made to
produce the required result, substantially as herein set forth.
In witness whereof, I, the said John Parker Lindsay, have hereunto
set my hand and seal, this Twelfth day of July, One thousand eight
hundred and sixty-five.
JOHN PARKER LINDSAY. (L.S.)