IMPROVEMENTS IN AND RELATING TO LOCKS CONTROLLED AND OPERATED BY TIME-MEASURING MECHANISM
Year: 1879

page_text: LETTERS PATENT to William Robert Lake, of the Firm of Haseltine, Lake, &
Co., Patent Agents, Southampton Buildings, London, for the Invention of
IMPROVEMENTS IN AND RELATING TO LOCKS CONTROLLED AND OPERATED
BY TIME-MEASURING MECHANISM." A communication from abroad by Edwin
Holmes, of Brooklyn, New York, United States of America.
PROVISIONAL SPECIFICATION left by the said Willian Robert Lake at the
Office of the Commissioners of Patents on the 25th June 1879.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN AND RELATING TO LOCKS
CONTROLLED AND OPERATED BY TIME-MEASURING MECHANISM." [A communica-
tion from abroad by Edwin Holmes, of Brooklyn, New York, United States of
America.]
These improvements relate to locks known as "time-locks' wherein time-
measuring mechanism is employed to automatically secure and release bolt-work or
other devices from the inside of a safe vault or other article or structure.
Ordinarily the tinie-measuring mechanism consists of clock-work operated by
mechanical force produced by a spring or weight, such mechanism being hereinafter
called a "mechanical time-piece," and in the event of the breakage or stoppage of
such mechanical time-piece while the safe is closed it has sometimes been necessary
in order to obtain access to the safe to force the door open. In addition to the
expence entailed by this operation several days are requisite to repair the damage,
and during that time the safe or other article or structure would be useless.
The object of one of the present improvements is to provide for a time-lock
simply time-measuring mechanism, which may be operated by electricity generated
from outside the safe, but cannot otherwise be controlled in its operation outside
the safe, and such mechanism as may be used alone or in connection with a
mechanical time-piece.
When combined with the ordinary mechanical time-picco the electro-magnetic
engine need only be put in operation on the stoppage of such time-piece, and to
complete the duty thereof, and inasmuch as it will not release the bolt-work more

page_text: rapidly than the time-piece would have done, it will not prove of assistance to any
one desiring to surreptitiously open the safe.
One improvement consists in the combination of a block or dog, an electro-
magnetic engine, and means for transmitting therefrom motion to a train of wheel-
work, by which it is imparted to devices controlling the block or dog, many
successive movements of the electro-magnetic engine being requisite to affect the
block or dog, and a considerable amount of time being occupied in so doing.
Another improvement consists in the combination in a time-lock of a block or
dog, an electro-magnetic engine, and a governor, preferably consisting of a pendulum
for regulating the speed of the electro-magnetic engine, so that the latter will not
run too rapidly.
A lock embodying an electro-magnetic engine and governor may be employed to
secure the bolt work of a safe for any length of time, such as a number of consecutive
days if desirable.
Another improvement consists in the combination in a time-lock of a block or
dog, a mechanical time-piece, and an electro-magnetic engine in such manner that
either the mechanical time-piece or the electro-magnetic engine may operate the
block or dog independently of the other.
Another improvement consists in the combination in a time-lock of a block or
dog and mechanism for operating the same, actuated either by mechanical force
stored up inside the safe or vault to which the lock is applied, or by a current of
electricity generated outside the safe or vault.
Another improvement consists in the combination in a time-lock of a block or
dog, a mechanical time-piece, an electro-magnetic engine (preferably one having a
governor of the kind above referred to), a dial, and means for connecting the
mechanical time-piece and the electro-magnetic engine with said dial, so that either
such time-piece or engine may operate the dial without interfering with the other.
Another improvement consists in the combination in a time-lock with a block or
dog, a mechanical time-piece, an electro-magnetic engine and a dial of means for
connecting said dial with said time-piece and said electro-magnetic engine so that
it may be adjusted independently of both.
Another improvement consists in the combination in a time-lock of a dial and a
wheel transmitting motion thereto, and connected with its driving-shaft by a
friction-clutch, providing for a circumferential or rotary adjustment of said gear-
wheel relatively to the driving-shaft in one direction, but locking it positively
thereto against movement in the other direction, whereby they may be made
to engage in any relation, and the dial connected with said gear-wheel may be set
at any desirable point without lost motion.
The object of another improvement is to provide an improved means for pre-
cluding the release of the bolt-work during any day when access to the safe will
not be desired. This improvement consists in the combination in a time-lock
with a lever for controlling the operation of its lock or dog, and an unlocking-
finger for operating on said lever to withdraw the block or dog and release the bolt-
work of a device actuated by the unlocking-finger in operating said lever, and
capable of being set so that the first passage of the unlocking-finger past it will
serve only to set it, and so that a subsequent passage will serve to operate the
lever.
The object of another improvement is to effectually preclude the release of the
bolt-work on the tilting of a safe by the shifting of the dog of a time-lock for
controlling the bolt-work.
This improvement consists in the combination with the slider-bar carrying the
block or dog of a time-lock of a pendulous bob or stop pivoted to the case of said
lock, and weighted at one end, so that on the tilting of the safe to which the lock
may be applied to release the block or dog it will obtrude itself behind the slider-
bar, and preclude the block or dog from movement.
Another improvement consists in the combination in a time-lock of a block or
dog, a rotary dial, a finger for controlling the movement of said block or dog, an

page_text: arm carrying said finger supported on the dial shaft, or a sleeve, or a collar thereon,
and capable of adjustment relative to the dial and pin for locking said arm to the
dial provided with a push-piece at the front of the dial and a spring for actuating
it to engage with the dial."
Another improvement consists in the combination in a time-lock of a block or
dog, a lever connected thereto for drawing it inward with a positive action to
release the bolt-work, an unlocking finger for operating said lever so as to draw the
block or dog inward, and a catch or detent for engaging tho said lever after tho
block or dog is drawn inward so as to hold said block or dog during the time it is
desired that the bolt-work should remain unlocked.
Another improvement consists in the combination in a time-lock of a block or
dog, a lever connected thereto for drawing it inward, a detent for engaging with
said lever, a dial, a finger carried by the dial, and adapted to release the detent
from said lever, and a spring for actuating said lever so as to draw the block or
dog forward to operate on the bolt-work,
SPECIFICATION in pursuance of the conditions of the Letters Patent filed by
the said William Robert Lake in the Great Seal Patent Office on the 24th
December 1879.
WILLIAM ROBERT LAKE, of the Firm of Haseltine, Lake, & Co., Patent Agents,
Southampton Buildings, London. "IMPROVEMENTS IN AND RELATING TO LOCKS
CONTROLLED AND OPERATED BY TIME-MEASURING MECHANISM." A communica-
tion from abroad by Edwin Holmes, of Brooklyn, New York, United States of
America,
These improvements relate to locks known as "time-locks" wherein time-
measuring mechanism is employed to automatically secure and release bolt-work or
other devices from the inside of a safe, vault, or other structure.
Ordinarily the time-measuring mechanism consists of clock-work operated by
mechanical force produced by a spring or weight, and herein termed a "mechanical
time-piece," and in the event of the breakage or stoppage of such mechanical time-
piece while the safe is closed it has sometimes been necessary in order to obtain.
access to the safe to force the door open. In addition to the expense entailed by
this several days are requisite to repair the damage, and during that time the safo
or other articlo would be useless.
The object of one part of these improvements is to provide for a time-lock a
simple time-measuring mechanism which may be operated by electricity generated
from outside of the safe, but cannot otherwise be controlled in its operation outside of
the safe, and such a mechanism as may be used alone or in connection with a
mechanical time-piece. When combined with the ordinary mechanical time-pieco
the electro-magnetic-engine need only be put in operation on the stoppage of such
time-piece, and to complete the duty thereof, and inasmuch as it will not release the
bolt-work more rapidly than the time-piece would have done it will not prove of
assistance to any one desiring to surreptitiously open the safe.
One improvement consists in the combination of a block or dog, an electro-
magnetic engine, and means for transmitting therefrom motion to a train of wheel-
work by which it is imparted to devices controlling .the block or dog, many

page_text: successive movements of the electro-magnetic engine being requisite to affect the
block or dog, and a considerable amount of time being occupied in so doing.
Another improvement consists in the combination in a time lock of a block or
dog, an electro-magnetic engine, and a governor, preferably consisting of a pendulum
for regulating the speed of the electro-magnetic engine so that the latter will not
run too rapidly.
A lock embodying an electro-magnetic engine and governor may be employed to
secure the bolt-work of a safe for any length of time, such as a number of con-
secutive days if desirable.
Another improvement consists in the combination in a time-lock of a block or
dog, a mechanical time-piece, and an electro-magnetic engine in such manner that
either the mechanical time-piece or the electro-magnetic engine may operate tho
block or dog independently of the other.
Another improvement consists in the combination in a time-lock of a block or
dog, and mechanism for operating the same, actuated either by mechanical force
stored up inside of the safe or vault to which the lock is applied, or by a current
of electricity generated outside the safe or vault.
Another improvement consists in the combination in a time-lock of a block or
dog, a mechanical time-piece, an electro-magnetic engine (preferably one having a
governor of the kind above referred to), a dial, and means for connecting the
mechanical time-piece and the electro-magnetic engine with said dial so that either
such time-piece or engine may operate the dial without interfering with the
other.
Another improvement consists in the combination in a time-lock with a block or
dog, a mechanical time-piece, an electro-magnetic engine and a dial, of means for
connecting said dial with said time-piece and said electro-magnetic engine so that
it may be adjusted independently of both.
Another improvement consists in the combination in a time-lock of a dial and a
wheel transmitting motion thereto and connected with its driving shaft by a
friction-clutch providing for a circumferential or rotary adjustment of said gear-
wheel relatively to the driving-shaft in one direction, but locking it positively
thereto against movement in the other direction, whereby they may be made to
engage in any relation, and the dial connected with said gear wheel may be set
at any desired point without lost motion.
The object of another of the said improvements is to provide improved means for
precluding the release of the bolt-work during any day when access to the safe
will not be desired. This improvement consists in the combination in a time-lock
with a lever for controlling the operation of its block or dog, and an unlocking
finger for operating on said lever to withdraw the block or dog and release the bolt
work of a device actuated by the unlocking finger in operating said lever, and
capable of being set so that the first passage of the unlocking finger past it will
serve only to set it, and so that a subsequent passage will serve to operate the
lever.
The object of another of these improvements is to effectually preclude the release
of the bolt work in the tilting of a safe by the shifting of the dog of a time-lock
for controlling the bolt-work.
This improvement consists in the combination with the slider-bar carrying the
block or dog of a time-lock of a pendulous bob or stop pivoted to the case of said
lock, and weighted at one end, so that on the tilting of the safe to which the lock
may be applied to release the block or dog it will obtrude itself behind the slider-
bar, and preclude the block or dog from movement.
Another improvement consists in the combination in a time-lock of a block or
dog, a rotary dial, a finger for controlling the movement of said block or dog, an
arm carrying said finger supported on the dial-shaft or a sleeve or collar thereon,
and capable of adjustment relative to the dial, and a pin for locking said arm to the
dial, provided with a push-piece at the front of the dial, and a spring for actuating
it to engage with the dial,

page_text: Another of these improvements consists in the combination in a time-lock of a
block or dog, a lever connected thereto for drawing it inward with a positive action
to release the bolt-work, an unlocking-finger for operating the said lever to draw
the block or dog inward, and a catch or detent for engaging said lever after the
block or dog is drawn inward, so as to hold said block or dog during the time it is
desired that the bolt-work should remain unlocked.
Another of these improvements consists in the combination in a time-lock of a
block or dog, a lever connected thereto for drawing it inward, a detent for engaging
with said lever, a dial, a finger carried by the dial, and adapted to release the detent
from said lever, and a spring for actuating said lever so as to draw the block or dog
forward to operate on the bolt-work.
"
The said improvements also consist in details of construction hereinafter
explained.
In the accompanying Drawing,-
Figure 1 is a front view of a time-lock embodying these improvements, with
the cover removed, and including a view of a portion of the inside of a door and
bolt-work thereof.
Figure 2 is a transverse section of the said lock.
Figure 3 is a face view of a portion of the lever for releasing the dog of the lock
from the bolt-work, including a secondary lever for precluding the lock from releasing
the bolt-work during a holiday.
Figure 4 is a front view of a lock with the mechanical time-piece removed, an
outline in dotted lines of the dial of the lock being included.
Figure 5 is a face view of the dog-releasing lever, shewing a secondary lever
applied thereto, for precluding the releasing of the bolt-work during a holiday, a
catch or detent for holding the said dog-releasing lever while the bolt-work is to be
left free of the lock, fingers for operating the said lever and detent, and an outline
in dotted lines of the dial of the lock.
Figure 6 is a back view, drawn to an enlarged scale, of the dial and the means
for transmitting motion thereto from the mechanical time piece, and from the
electro-magnetic engine; and
Figure 7 is a transverse section of the said dial, including sectional side views of
the locking and unlocking-fingers and their appurtenances.
Similar letters designate corresponding parts throughout the Drawing.
A designates the door of a safe or vault of any suitable construction; B, B, C,
designate the bolt work of the door, consisting of bolts B, B, and a carrying bar C
connected thereto, so as to insure their being simultaneously moved in order to
secure or release the door; D, D, designate a pair of elbow-levers pivoted at about
the middle to the door A; their outer arms are connected to the carrying-bar C so
as to control the movements thereof, but their inner arins b, b, project toward the
case S of the time-lock; c is a dog or block mounted on a slider-bar E in the time-
lock, and extending through the case so that it may fit between the inner arms b, b,
of the elbow-levers D, D. It will be seen that if after the bolt work B, C, is moved
forward to secure the door A, and the dog c is shot or impelled between the arms b, b,
of the elbow-levers D, D, it will preclude the inward movement of the said armus,
and hence the rearward movement of the bolt-work so as to release the door A.
One of the levers D may be sufficient. It is through this dog e that the time-lock
controls the movement of the bolt-work.
Referring now to the time-lock, W designates a mechanical time-piece consisting
of any suitable train of wheels for measuring time, and effecting once in twenty
[four hours a complete rotation of a moveable dial J, bearing numerals indicative of
the twenty four hours of a day. This dial carries with it two arms T, T', which
extend from the dial-shaft, and are capable of being severally adjusted independently,
and connected in different positions to the dial J to provide for adjusting the locking
and unlocking fingers U, U¹, which they respectively actuate, so that they will
operate at different hours. These arms (see particularly Figures 5 and 7) are shewn
(as mounted loosely on the collar forming part of the dial J, and as provided with

page_text: pins p, p, capable of being fitted with different holes v in the back of the dial,
these pins being attached to push-pieces p', p', accessible from the front of the
dial, and held in the holes by springs p2, 22, when not actuated by the push
pieces.
The locking-finger U is affixed to and carried by the arm T, whereby it is
actuated; but the unlocking-finger U', for the purpose of giving it the requisite
rigidity, is shewn as affixed to a ring fitted in a recess in the dial, so as to be free
to turn relatively to said dial, and as extending through an arc-shaped slot in said
dial communicating with said recess, so as to admit of its movement relatively to
the dial, its connection with the arm T¹, by which it is operated, being effected by
the passage of the said finger through a hole in said arm.
By pressing back the push-pieces p', ', the pins may be disengaged from the
dial, and then the arms may be adjusted at pleasure, and on releasing the push-
pieces the pins will engage with the dial, and the arms will be locked thereto.
The locking and unlocking-fingers combined with the above described inechanism
can be easily adjusted relatively to the dial without detachment from their supports,
and can be locked to the dial positively, and not merely secured thereto by friction.
If they become accidentally loosened or freed from the dial they will slip only as
far as the next hole, whereas if secured by friction merely they would on becoming
loosened slip continuously around the dial, and fail to fulfil their functions at all.
One object of the numbers on the dial is to facilitate the adjustment of the arms,
to cause the locking and unlocking fingers to effect the movement of the dog c, and
secure or release the bolt-work B, C.
Preferably I provide the said arms with indices or pointers extending over the
face of the dial, so as to facilitate their accurate adjustment relative thereto.
F designates a spring which acts on the slider-bar E, so as to impel the dog c
outward between the arms b, b, of the levers D, D, when not otherwise actuated.
K', d, designate a lever, the arm d* of which is connected to the slider-bar E,
and the arm K of which projects in the path or line of travel of the unlocking-
finger U, so as to be depressed on the contact of the latter with a secondary lever L
arranged on it, and thus through the arin d* cause the inward movement of the
dog c with a positive movement derived from the dial. V designates a catch or
detent for engaging with the arm K' of the lever K', d*, and retaining it in a
depressed position and the dog c in its rearmost position for the number of hours
during which the safe or vault is desired to be kept open. This catch or detent
is shown as consisting of a bell crank lever, weighted at one end, and provided
at the other with a convex head h, and the end of the arm K¹ of the lever K', d*,
is shown as being rounded on the underside; hence on the depression of the lever
it comes in contact with the head of the said catch or detent, moves it aside, and
passes below it, whereupon the detent moves forward and its head slips over the
end of the said arm K, and holds the said lever stationary.
At the time the lock is set to secure the bolt-work the locking-finger U comes in
contact with the catch or detent V, swings it aside, and releases the arm K' of the
lever K', d*, from it, whereupon the spring F forces the slider bar E forward and
obtrudes the dog c between the arms b, b, of the elbow-levers D, D, and secures the
boltwork against movement.
The secondary lever L, arranged on the arm K¹ of the lever K', d*, is pivoted in
place between the ends, so that it may be adjusted to different positions so far as
permitted by its slot c, and stop piece, and is held in different positions by a
friction spring X. It may be provided with a handle to facilitate its adjustment,
and it is provided at the end nearest the dial J with diverging arms ff, the
upper of which is shorter than the lower. The object of this secondary lever is
to provide for the working of the mechanical time-piece W for twenty-four hours
or more without affecting the dog c and releasing the bolt-work.
It will be seen by reference to Figure 5 that if the secondary lever L has the
rams ff, thrown upward the unlocking-finger U₁ in its transit comes in
contact with the lower arm of said lever, and throws the lever into the reverse

page_text: position, as indicated by the dotted outline, and passes onward without affecting
the lever K', d*, and dog c. It will not again come into contact with the secondary
lever L until twenty four hours afterward, hence a day is passed without releasing
the bolt-work. In its succeeding transit the unlocking-finger comes in contact with
the upper arm 11 of the secondary lever L, and as the said arm cannot then yield
depresses the lever K¹, d*, and draws the dog c inward. The advantage of this
secondary lever is that it enables a time-lock to be set so as not to release the bolt-
work on any holiday, whether it is a Sunday or an irregularly-occurring holiday,
such as Christmas. N designates a pendulous stop or bob, weighted at one end,
and pivoted to the case S of the lock, so that upon tilting the safe to which said
lock is applied its unweighted end will obtrude itself behind the slider-bar E, so as
to preclude the latter from movement, and hold the block or dog c between the
levers D, D, controlling the bolt-work.
-"
: G, I, designate an electro-magnetic engine capable of being operated within the
case S of the lock through electricity generated outside the safe or vault, and shewn
as consisting of electro magnets G and armatures I, the former of which are to bo
made to communicate by wires or through metallic portions of the safe with an
electric circuit, through which currents of clectricity may be passed from a battery
or other generator outside the safe or vault, under control of any ineans or devices
for breaking the circuit, so that the armatures may be alternately attracted to and.
released from the magnets. In order that this engine may not operate too rapidly
I have shown as. combined with it a governor to regulate its action to correspond
with the operation of the mechanical time-piece W. This is an important fenture
of my Invention, because unless the action of the electro-magnetic engine were
retarded or governed in some way it might prove an aid to any one seeking to
surreptitiously open the safe or vault. The governor which I have shown consists
of pendulums ML pivoted at n to the case of the lock, and connected by arms with
the armatures so that they will be set in motion by the movements of the armatures
and will impede a too rapid movement thereof. The armatures carry pawls i by
which they transmit motion through ratchet wheels ; to a worm wand train of
wheel work O to the dial J, and devices for controlling the block or dog, stop-
pawls being employed to preclude the backward movement of the ratchet-
.wheels.
The mechanical time-piece W, electro-magnetic engine G, I, and dial J. are con- .
nected, so that either the time-piece or engine may operate the dial without
interference from the other, and so that the dial may be adjusted independently of
both for the purpose of setting it.
I will now proceed to describe such connection with a special reference to Figures
4 and 6. O¹ designates a shaft driven by the electro-magnetic engine G, I, through
the train of wheels O. The dial J and a gear wheel P¹ rigidly connected with it
are mounted loosely on this shaft, and through this gear-wheel motion is imparted
to the dial. The connection which I have shewn between this gear-wheel P' and
the engine-shaft O' consists of a ratchet-wheel Q rigidly affixed to said shaft, and
pawls qq, carried by the gear wheel P¹ so that the ratchet-wheel will engage with
them when in motion, and so that the gear-wheel and dial may rotate independently
of the ratchet-wheel whenever it and the, engine are inactive, or for the purpose of
setting the dial. The direction in which the shaft O¹, ratchet wheel Q1, and dial J
rotate is indicated by the arrow ¹ in Figure 6.
R¹, R¹, designate two gear wheels, supported on shafts R2, R2, driven by the
time-piece W, and engaging with the gear-wheel P¹. They are provided in the
back with circular cavities, and fitted on hubs R³, R³, which are rigidly affixed to
the shafts R2, R2. These hubs R³, R³, are provided with peripherical recesses &¹, a¹,
tapering from end to end, wherein are arranged rollers t, t, and springs u, u, tending
to force the rollers toward the narrower ends of the recesses s¹, s¹. Thus I form a
friction-clutch whereby provision is afforded for circumferential adjustment of the
gear-wheels relative to their driving shafts in one direction, and for effecting their
positive engagement with said shafts at any point against movement in the opposite.
-

page_text: direction, and not only at regular points such as may be done with ratchet-wheels
and pawls. When the time-piece is in operation the hubs R, R³, are rotated in the
direction indicated by the arrows n², n², and they then wedge the rollers t, t,
toward the narrow ends of the recesses s¹, s¹, and against the inner side of the rims
of the gear-wheels and thereby lock the gear-wheels to them to carry the gear-
wheels around. Thus motion will be transmitted to the gear-wheel P' and dial J,
and the pawls q, q, will play over the teeth of the ratchet-wheel Q¹.
When the electro-magnetic engine G, I, operates the gear-wheels P₁ and dial J
the rims of the gear-wheels R¹, R₁, will draw the rollers t, t, toward the wide ends
of the recesses 81, 8', and they will no longer lock the said wheels to the hubs R³, R³,
hence the said wheels may run free of the time-piece. The moment the said wheels
cease revolving however the springs u, u, force the rollers t, t, toward the narrow
ends of the recesses s¹, 8', in position to lock the wheels to the hubs, so that on the
starting of the time-piece there will be no lost motion between it and the dial. It
will be understood also that as the dial may run free of either the mechanical time
piece or the electro-magnetic engine, it may also be turned in the direction of the
arrow to set it, as the pawls will then play over the ratchet wheel Q', and the
wheels R', R, run free from the hubs R³, R³.
A very important advantage results from connecting the dial with its operating
mechanism by clutches which are in condition to engage with the means for trans-
mitting motion to the dial instantaneously and without lost motion as compared
with a pawl or pawls and a ratchet-wheel, because in the latter case even with the
finest ratchet teeth that can be reliably used there will be considerable lost motion
at the dial. Such lost motion occasions considerable trouble in setting the dial, as
with a ratchet wheel oftentimes the dial has to be set ahead of the real time at
which it is desired to set it, in order to allow of the operating mechanism catching
up and engaging with it at the desired point, thereby entailing the loss of much
time in setting the dial.
Both the mechanical time-piece and the electro-magnetic engine may advan-
tageously be made in duplicate to afford additional security against a lock becoming
inoperative through breakage of parts comprised in them.
It will be seen that by my Invention I provide a time-lock operated by a positive
action in unlocking, and which, in case of a stoppage of the time-piece, may be
operated through electricity outside the safe or vault to which the lock is applied,
and at only the same speed as the time piece would have operated had it continued
active; that I provide a time-lock which may be entirely operated by electricity
supplied from outside, and yet one that is incapable of being controlled in its
movements from outside, save as regards the supplying of the electricity thereto;
and I provide a time-lock which may be operated by the motive power of a
mechanical time-piece arranged in it, or by electricity supplied from outside, and
hence may be safely locked for a long time provided the source through which the
electricity is conducted to it be protected and concealed; that I provide a time-
lock which may be very conveniently set not to unlock on any day whatsoever
during which it is desirable to have it secure the bolt-work; and that I provide a
lock whose dog is, in a very simple manner, precluded from releasing the bolt-work
on the tilting of the safe to which it is applied.
Having thus fully described the said Invention as communicated to me by my
foreign correspondent, and the manner of performing the same, I wish it under-
stood that I claim,-
First. In a time-lock the combination of a block or dog, an electro-magnetic
engine, means for transmitting motion therefrom to a train of wheel-work, by
which it is imparted to devices controlling the block or dog, so that many successive
movements of the electro-magnetic engine will be requisito to affect the block or
dog, and a long period of time will be occupied in accomplishing this result.
Second. In a time-lock the combination of a block or dog, an electro-magnetic
engine for operating the same, and a pendulum or other governor for regulating the
speed of said electro-magnetic engine.

page_text: Third. In a time-lock the combination of a block or dog, an electro-magnetic
engine, and a governor for regulating the speed of said electro-magnetic engine,
consisting of a pendulum pivoted to a suitable support and provided with an arm
connected to the armature of the said electro-magnetic engine.
Fourth. In a time-lock a block or dog, a mechanical time-piece, and an electro-
magnetic engine, the said mechanical time-piece and electro-magnetic engine being
so combined with the said dog or block that either may operate the same indepen-
dently of the other.
Fifth. In a time-lock the combination of a block or dog, a mechanical time-piece,
and an electro-magnetic engine provided with a governor for regulating its speed
for the purpose specified.
Sixth. In a time-lock the combination of a block or dog and mechanism for
operating the same, actuated either by mechanical force stored up inside the safe or
vault to which the lock is applied, or by a current of electricity generated outside
said safe or vault.
Seventh. In a time-lock the combination of a block or dog, a mechanical time-
piece for operating said block or dog, an electro-magnetic engine for operating said
block or dog, a dial, and means for connecting the said mechanical time-piece and
the said electro-magnetic engine with the said dial, so that either inay operate the
dial independently of the other.
Eighth. In a time-lock the combination with a block or dog, a mechanical time
piece, an electro-magnetic engine, and a dial of means for connecting said dial with
said mechanical time-piece and said electro-magnetic engine, so that it may be
adjusted independently of both.
Ninth. In a time-lock the combination of a dial and a gear-wheel transmitting
motion thereto, and connected with its driving shaft, by a friction clutch with
means for imparting a circumferential or rotary adjustment to the said wheel in
one direction relatively to its driving-shaft, while locking it positively thereto
against movement in the other direction, whereby the two may be made to engage
in any desirable relation without lost motion.
Tenth. In a time-lock the combination, with a dial, and means for operating it, of
gear-wheels adapted to communicate motion to the dial, hubs for supporting the
said gear-wheels, tapering recesses between the said hubs and gear-wheels, rollers
or dogs fitting in the said tapering recesses, and springs tending to force the said
rollers toward the narrow end of the said tapering recesses, substantially as and for
the purpose specified.
Eleventh. In a time-lock the combination of a dial,. . a mechanical time-piece
adapted to operate said dial, an electro-magnetic engine capable of being supplied
with a current of electricity from outside the lock for the purpose of operating the
said dial, and a gear-wheel connected with the said dial mounted loosely on a shaft
connected with the said electro-magnetic engine, a ratchet-wheel on the said shaft,
pawls on the said gear-wheels with which the ratchet wheel engages, gear-wheels
meshing into the former gear-wheels and supported on independent hubs driven by
the mechanical time-piece, tapering recesses between the latter gear-wheels and
their hubs, rollers, or dogs, and springs in the said recesses, substantially as and for
the purpose specified.
Twelfth. In a time-lock the combination with a lever for controlling the operation
of its block or dog, and an unlocking-finger for operating on the said lever to
withdraw the block or dog and release the bolt-work of a device actuated by tho
unlocking finger in operating the said lever, and capable of being set so that the
first passage of the unlocking-finger past it will only serve to set it, and so that a
subsequent passage will serve to operate the lever, substantially as for the purpose
specified.
Thirteenth. In a time-lock the combination with a lever for controlling its block
or dog, and an unlocking finger for operating on the said lever of a secondary lever
pivoted to the former, and provided with arms, either of which may be adjusted to

page_text: project within the line of travel of the unlocking-finger, substantially as and for
the purpose specified.
Fourteenth. The combination with the slider-bar carrying the block or dog in a
time-lock of a pendulous stop or bob pivoted to tho case of the said lock, and
weighted at one end so that its unweighted end can obtrude itself behind the
slider-bar, substantially as specified.
Fifteenth. In a time-lock the combination of a block or dog, a rotary dial, a
finger for controlling the movement of said block or dog, an arm carrying the said
finger and supported on the dial-shaft, or a sleeve or collar thereon, and capable of
adjustment relatively to the dial, and a pin for locking the said arm to the dial
provided with a push-piece at the front of the said dial, and a spring for actuating
it to engage with the same.
Sixteenth. In a time-lock the combination of a block or dog, a lever connected
thereto for drawing it inward with a positive action to release the bolt-work, an
unlocking-finger for operating the said lever to draw the block or dog inward, and
a detent for engaging with the said lever after the block or dog is drawn inward,.
so as to hold the said block or dog during the time it is desired that the bolt-work
should remain unlocked.
Seventeenth. In a time-lock the combination of a block or dog, a lever connected
thereto for drawing it inward, a detent for engaging with the said lever, a dial, a
finger carried by the dial and adapted to release the detent from the said lever, and
a spring for actuating the said lever so as to throw the block or dog forward.
In witness whereof, I, the said William Robert Lake, have hereunto set my
band and seal, this Twenty-fourth day of December, in the year of our Lord
One thousand eight hundred and seventy nine.