Improvements in and relating to Indicator Locks.
Year: 1895

page_text: Date of Application, 14th Feb., 1895-Accepted, 8th June, 1895
COMI MI SE MULTICATION.
Improvements in and relating to Indicator Locks.
A communication from FRIEND WILLIAM SMITH, of 254, Lafayette Street,
Bridgeport, County of Fairfield and State of Connecticut, United States of
America, Manufacturer.
I, PETER JENSEN, of 77 Chancery Lane, London, England, Patent Agent, do
hereby declare the nature of this invention and in what manner the same is to be
performed, to be particularly described and ascertained in and by the following
statement:-
This invention relates to certain new and useful improvements in indicator
devices, such as are commonly used in connection with register locks, which latter
are principally for the purpose of detecting any unlawful tampering.
In indicator locks the locking is effected and automatically registered on a
combination of numbers, letters, or other characters, and this combination is
instantly changed by the act of unlocking.
It is not necessary that any particular precautions be taken in respect to the
locking device proper, since indicator locks are somewhat of the nature of ordinary
lead seals, and it is customary to record the particular combination which appears
when the device is locked, so that, should it be a fact that said combination had
become changed before the device is lawfully and officially unlocked, there would
be clear evidence that the lock had been tampered with.
In indicator locks as heretofore constructed, it has been necessary to employ a
great many elements, and such locks have been exceedingly bulky, owing to the
general principles on which they have been constructed, and it is the aim of the
present invention to accomplish with a far less number of parts, all the results that
any prior constructions have accomplished, a further aim of my invention being to
reduce the weight and bulk of such locks to a minimum.
Moreover, in indicator locks as heretofore constructed, it has been found
necessary to operate the registering devices which present the combination in
succession and independent of each other, in order that the greatest possible
number of combinations might be obtained, and this has made it essential that
mechanism should be employed for the purpose of not only effecting independent
movements of the various registering devices, but also in order that the latter
might, at predetermined times operate in unison, as for instance, when changing
the indicator from units to tens, tens to hundreds, hundreds to thousands, &c.
This improvement contemplates a uniform and constant movement of the
registering devices, the different combinations being effected by the construction of
the registering elements, and not by any peculiarity in the movements of the
same.
The second part of the invention relates to the means whereby the lock is
secured or opened, and although the particular species of lock employed is not a
matter of much importance, still it is necessary to provide an indicator lock in
which it shall be impossible to open the lock without changing the combination
indicated, a further precaution being to provide a seal which shall guard the key
hole of the lock, and shall be locked in position by means positively controlled and
operated by the shackle of the lock itself.

page_text: In the accompanying drawings, which form a part of this application-
Figure 1 is a front elevation of my improved indicator lock.
Figure 2 an interior elevation with the casing sectioned.
Figure 3 a central vertical longitudinal sectional elevation, with the shackle in
lorked position.
Figure 4 a view similar to Figure 3, but showing the shackle unlocked.
Figure 5 a horizontal section at the line x-x of Figure 2.
Figures 6, 7, 8 and 9, are plan views with the cover and shackle removed, and
showing respectively by degrees the positions assumed by the parts as they are
operated from locked to unlocked conditions.
Figure 10 is a bottom view with the seal removed.
Figure 11 is a detail elevation of the key.
Figure 12 is a detail broken perspective of the bottom of the lock, showing
particularly the portion thereof to which the key is adapted.
Figure 13 a detail perspective of the slide yoke.
Figure 14 a bottom perspective of the lock showing a seal label part way
inserted, and
Figure 15 is a detail development of the chains at full length and in proper
relative positions.
Similar numbers and letters of reference denote like parts in the several figures
of the drawing.
1 is the casing of the lock, and 2 is a rotary sprocket drum journaled therein
and provided on its periphery with sockets a extending across the face thereof
which constitute grasping points, in the manner presently to be explained.
4, 5, 6, 7, are the indicator chains which are formed of equal sized links, as
shown, and are hinged together in each instance, said chaius being carried around
the drum 2, the hinges forming protuberances which snugly fit within the
sockets a, so that it will be clear that said drum and chains are in effect a sprocket
wheel and sprocket chains.
The chain 7 has one more link than the chain 6, the chain 6 oue more link thau
the chain 5, while the chain 5 has one more link than the chain 4, and each link
has thereon any suitable number, letter, or other character.
Secured within the casing is a graduated support 3 around which the chains
extend, so that it will be obvious that such chains are substantially endless belts
carried by the drum and support 3.
The outer surfaces of these grades against which the chains lie are circular and
smooth, so that when such chains are carried around by the movement of the
shackle they will drag with but very little frictional resistance around such
surfaces. These surfaces may of course be provided with anti-friction rollers
against which the chains may lie, but I do not consider this as necessary, since the
wear and resistance afforded by the stationary surfaces are not appreciable.
The casing is provided with an opening c, usually protected by some transparent
substance like glass or mica, through which the numbers or other characters on the
chain links register in alignment.
There are no two numbers or other characters that are alike on any one of these
chains, and the object of this is of course, to prevent the location of any one
number or character in the same position any greater number of times than is
absolutely necessary, in order that the greatest possible number of combinations
may be obtained.
Also it is not advisable to have the chains all of the same length, because in
such instance, the relative positions of the numbers or characters on such chains
would never be changed, and the number of combinations would be limited by the
number of the links in any one of the chains.
By making the chains of different lengths, as shown, and by carrying them in
harmony and always at the same rate of speed, I am enabled to obtain the greatest
possible number of combinations, namely, a number equal to the product of the
several numbers of links in each chain.

page_text: It, however, becomes necessary to so govern the movement of such chains
during a complete revolution of the drum 2, that the benefit of this arrangement of
the chains may be obtained, and the principal feature of my invention resides in
the manner in which I attain this result, an explanation whereof I will now give,
referring particularly to Figure 15 of the drawings.
This figure of the drawings represents the chains extended to their full lengths
with the numbers or characters thereon in proper relation with respect to each
other, as shown at Figures 1 and 2.
It will be observed that in these four chains there are eleven, twelve, thirteen
and fourteen links, respectively, and it will therefore be clear that the greatest
number of different combinations that can possibly be indicated in vertical align-
ment is equal to the product of eleven, twelve, thirteen and fourteen, or, in other
words, twenty-four thousand and twenty-four (24024).
The number of links in any one of these chains must not be a multiple of the
number of links in each chain which are carried beyond a given point during the
complete revolution of the drum, for otherwise the numbers or characters on a
chain would not be brought into all the registering positions, and the number of
combinations would thereby be greatly limited.
The rotary drum controls the extent throughout which the chains are carried
during a complete revolution of said drum, and in the present instance as shown
this drum is provided on its periphery with five equi-distant sockets a the sides of
the drum between said sockets being flat so that the drum is really pentagon with
the sockets at the angular portions thereof each side of the drum in cross section
being equal to the length of one of the links. Of course, a plain pentagonal drum
may be employed without sockets, but I prefer the construction shown and
described, since it is more efficient and prevents any accidental slipping of the
chains round the drum; but the gist of my invention in this respect resides in the
broad idea of carrying in unison a certain number of links in each chain beyond a
given point during a complete revolution of the drum, and I therefore do not wish
to be limited to any particular mechanical contrivance for effecting this result.
Moreover, endless belts with the numbers or characters appearing thereon may be
used instead of the link chains, and provided with grasping points to catch in the
sockets to prevent the slipping of such belts, but I prefer to utilize the links,
since they are easy to handle, are less likely to become disarranged, are more
easily repaired, and present generally a better appearance.
It is immaterial how many sides or grasping points are provided to the drum,
for it is only necessary that the number of links in each chain which are carried
beyond a given point during a complete revolution of said drum shall not be
divisible into the number of links in any one of said chains, and therefore, if the
number of liuks in any or all of said chains were changed, it might become essential
to change the construction of this drum so that it would carry more or less links
beyond a given point.
Of course the number of chains used is not a material feature, and it will be clear
that the greater said number is, the greater will be the number of combinations
possible, the aforesaid precautions of course being taken with respect to the links
of said chains, their relative arrangement, and the number of links in each chain
carried beyond a given point by a complete revolution of the drum.
The combination which appears in Figure 1 is 881X, and as the rotation of the
drum carries the chains toward the right (referring to Figure 1), or in the direction
of the arrow in Figure 15, it will be obvious from the foregoing description that
successive intermittent rotations of the drum throughout the arcuate segments
which bound each side thereof, will, respectively bring into registration the
combinations 6086, 2X92, 45S5, 1427, 3248, 53XY, 9664, 775S, 0900, X173,
8S31, 68Y9, 201Z, 4X8X, 1596, 34S2, 5225, 9347, 76X8, 076Y, X954, 810S,
6S70, 2833, 40Y1, 1X19, 358Z, 549X, &c., that is to say, every consecutive fifth
number or character in said chains will be successively brought into vertical
registration through the opening c by the complete revolution of the drum.

page_text: I will now describe the construction of the lock as shown in the drawings and
with which the improvement heretofore described has been combined.
The drum is hollow at its lower end as seen at 8, and has a hub 9'provided with
notches 10 projecting through the bottom plate 11 and the lock casing, and
affording one of the journals of said drum. 12 are guide slots formed in the
casing with which said notches register successively when the drum is
revolved.
The key which is shown at Figure 11 consists of a plain shank 13, from which
project wards 14, 15. The upper ward 14 is longer than the ward 15, so that
when the key is inserted within the drum 2, the ward 14 will project beyond the
hub 9 and above the inner face of the casing 1. When the key is turned the drum
will be revolved and the ward 14 will pass above said casing, so that it will be
readily understood that the key cannot be withdrawn until the succeeding guide
slot 12 registers with the notch which is engaged by said wards. The outer walls
of the guide slots 12 act as stops against which the ward 14 abuts, so that the
drum can be turned by the key throughout a limited extent, which latter is
predetermined by the movement of the drum necessary to cause the belts to register
the next succeeding combination.
It will thus be clear that the key must be removed from the drum and again
inserted with the wards within a succeeding notch in the hub before a new com-
bination can be indicated. This is an important feature, since it prevents any
overthrow of the drum, and moreover it makes it extremely difficult to successfully
tamper with the indicating mechanism for the reason that the key cannot be
employed as a means for rapidly revolving the drum for the purpose of registering
the entire number of combinations up to the combination upon which the lock was
Bealed.
The drum, the graduated support and chains, are all enclosed between the
bottom plate 11 and a top plate 16 through which latter projects the upper hub 17
of the drum. Between this top plate 16 and the upper wall of the casing of
the lock is a space within which all the mechanism for effecting and controlling
the locking and the unlocking is contained, which mechanism I will now
describe.
Secured around the hub 17 is a toothed wheel 18 and a ratchet wheel 19,
the latter being above the former.
20 is a yoke frame, which rests upon the plate 16 and fits snugly between the
side walls of the casing but is capable of a free sliding movement. This yoke is
21, which is within the field of travel of the ratchet wheel 19
provided with revolved one of the teeth thereof will engage said spur
so that when the
and cause the yoke to be carried rearward. The shackle 22 is pivoted at 23 at its
heel end in the casing while its nose is provided with a notch 24, which latter is
engaged by a bolt 25 carried by the yoke 20 whereby said shackle may be locked
in closed position.
When the yoke is withdrawn by the action of the ratchet as above explained,
the bolt will be withdrawn from the notch 24, thereby unlocking the shackle.
26 is a dog pivoted at 27 to the plate 16, and having its nose 28 in engagement
with the toothed wheel 18, so that as the latter is revolved the tail 29 of said dog
will be swung outwardly. 30 is a pin carried by the yoke 20 and projected
inwardly therefrom, and sustained around said pin is a coil spring 31 which bears
against the head of the dog 26 to keep the nose 28 in normal engagement with the
wheel 18; two of its ten teeth pass the nose 28 while one of the ratchet teeth on
the wheel 19 is being turned to bring a succeeding combination into registration.
When the parts are in normal position, as shown at Figure 6, the tail 29 of the
dog will be immediately in front of a projection 32 carried by the yoke, so that the
latter cannot be moved to release the nose of the shackle until said tail is swung-
out of the way.
33 is a gate at the forward end of the yoke and contained- between the
projection 32 and a shoulder 34 which extends from the inner wall of said yoke,

page_text: which gate is slightly wider than the tail 29, so that the latter will readily pass
therein.
As the drum is turned the tail 29 will move away from the projection 32 and
will be swung immediately behind the shoulder 34 by the action of the tooth x of
the toothed wheel 18 against the nose of the dog, as shown at Figure 7, and while
the parts are in this position it would be impossible to withdraw the bolt 25
from the shackle, since the shoulder 34 would abut against the tail of the dog.
By the time the parts have got to the position shown at Figure 7, one of the
ratchet teeth in the wheel 19 will have come into engagement with the spur 21,
while at the same time the nose of the dog will be on top of the tooth in the
wheel 18, and the continued turning of the drum necessary to cause said tooth to
pass beyond said nose will cause the yoke to be slightly withdrawn, so that when
the tooth does pass the nose the projection 32 will have been retracted far enough
so that the tail of the dog will be swung, by virtue of the spring 31, against said
projection and in position to enter the gate 33, as shown at Figure 8, the yoke
frame 20 being thrown forward by reason of the ratchet tooth on the wheel 19
acting against the spur 21 on said frame.
The tail of the dog is now free to enter the gate 33, and on the continued
turning of the drum the ratchet will act on the spur to withdraw the yoke com-
pletely and release the nose of the shackle from the bolt 25, as clearly shown at
Figure 9. The key is then operated to turn the shaft 17 a little further so as to
bring the succeeding combination far enough so as to properly register, and this
would bring the nose 28 right between the teeth y and z, where it would remain till
the projection 32 was removed by locking the shackle again, and then the tail 29
being free the spring 31 would bring nose 28 between the teeth
and z.
y
It will be observed that the spring 31 will be under tension when the parts are
in this position last referred to, and that the nose 28 of the dog will have been
projected by the action of this spring between two of the teeth on the wheel 18.
The dog when in this position acts as a detent to prevent the backward turning of
the drum, while the spring performs the double function of projecting said nose
between the teeth of the wheel 1 and of normally advancing the yoke frame to
locking position.
It becomes necessary, therefore, to interpose some means whereby the yoke
frame may be held in the position shown at Figure 9, against the action of this
spring.
35 is a plunger pin which extends vertically and loosely through suitable
perforations in the plates 11, 16, and also through the bottom of the lock casing,
said pin having affixed to the upper extremity thereof a head 36, which latter rests
upon a coil spring 37 contained within a socket 38 depending from the plate 16, the
function of which spring is to keep the head in a normally elevated position..
When the nose of the shackle is in locking position it will press down this head
against the resiliency of the spring 37, as shown at Figure 3, but when the shackle
is released said head will immediately be projected upward in front of the bolt 25,
as shown at Figures 4 and 9, and will thereby prevent the return of the yoke frame
to its normally advanced position.
I prefer to make the shape and dimensions of this head in cross section the same
as the corresponding shape and dimensions of the nose of the shackle, so that when
the latter is unlocked said head will fill the opening in the top of the casing through
which said nose in locked position projects, so that dirt or other foreign matter
cannot get inside of the casing. I provide a shoulder 39 which extends laterally
from the bottom of this head and abuts against the lock casing to limit the upward
movement of said head, so that the top of the latter will, when projected upwardly,
be substantially flush with the outer face of the casing.
When the shackle is closed the nose thereof will depress the head 36 as shown
at Figure 3.
At the bottom of the lock casing formed a label case 40 within which any
suitable seal label 41 may be inserted, so as to entirely cover up the key hole.

page_text: When the head 36 is depressed by the shackle the pin 35 will pierce this label, thus
locking the same in position, as shown at Figure 3, so that said label cannot possibly
be removed without destroying it.
This is a very good feature of the invention since it ensures the lock as against
any successful tampering. Upor. these labels may be printed or stamped any words
or letters to signify the destination of the goods or the railways over which they are
to be transported, and it is a very simple matter to place secret marks of identifi-
cation on these labels, so that if they are unlawfully destroyed it will be impossible
to provide others in their places without exposing the fraud.
Of course there are various ordinary mechanical contrivances that may be used
instead of the pin 35, but they would all have to be operated to secure the label
by means of some portion of the lock during the act of locking, and, therefore, I
do not wish to be confined to any particular element for locking this label, the gist
of the invention in this respect resting in the broad idea of a locking device
for the label controlled and operated by some active element in the lock during the
act of locking.
When it becomes necessary to open the lock, the seal is simply cut through or
otherwise broken so as to permit of the passage of the key, and after the shackle has
been unlocked and the pin 35 raised, the mutilated label is then readily withdrawn
from its case.
It will thus be understood that the label must be first destroyed before the lock
can be opened, and when it is borne in mind that the lock cannot be opened without
changing the registration, it will be seen that it is well nigh impossible to tamper
with the lock without leaving such clear evidence thereof as would enable an
inspector to immediately perceive that such tampering had been effected.
It will be evident from the foregoing description, that the dog 26 has two
functions, namely, to prevent the rotation of the yoke by a sudden jar or tap
against the lock casing, and to lock the drum as against backward turning such
as might be attempted to restore a preceding combination. Separate springs
may of course be employed for the dog and yoke, but I prefer to use a single
spring which shall act both to throw the nose of the dog between the teeth of
the wheel 18 and also to project the yoke into locking position.
This improved indicator lock is very readily assembled, for it will be seen that the
indicating chains and the drum and support for carrying the same are assembled
and secured in position between the plates 11 and 16, and therefore, the locking
mechanism may be removed for repairing or for other purposes without disturbing
the indicating instrumentalities.
The invention is completely embodied in the construction which comprises the
chains, the series of supports and the rotatory drum for properly carrying said
chains, so that the same number of links in all of the chains will be carried beyond a
given point by the complete revolution of said drum, and means for locking the
latter as against complete rotation save in one direction, the adaptation of the
invention for various uses being merely a secondary matter.
Having now particularly described and ascertained the nature of my said inven-
tion, and in what manner the same is to be performed, I declare that what i
claim is :-
1. An indicator lock, comprising a rotatory drum, endless chains of unequal
lengths having thereon numbers or characters and carried by said drum, and
supports for the opposite ends of said chains, substantially as set forth.
2. An indicating lock, comprising a rotatory drum, endless chains of unequal
lengths having thereon numbers or characters and carried by said drum, supports
around which the opposite ends of said chains pass, and means for preventing
said drum from being turned to a given position excepting in one direction,
substantially as set forth.
3. An indicating lock, comprising a series of chains of unequal lengths all the
chains composed of the same sized links, a rotatory drum and a series of supports
"

page_text: whereby said chains are properly carried after the manner of endless belts, and
means for preventing said drum from being turned to a given position excepting
in one direction. the links of said chains having thereon numbers or characters
capable of registering in vertical alignment at a given point, the construction of
said drum and chains being such that at every complete revolution of said dru
the same number of links in all the chains will be carried beyond a given point,
substantially as set forth.
4. In an indicating lock, the combination of a series of endless chains of unequal
lengths, all chains composed of links of the same size carrying numbers or
characters on their faces, a rotatory dium and a series of supports by which said
cbains are carried, said chains being provided with equi-distant projections while
the drum has equi-distant sockets for engaging said projections, whereby the same
number of links in all of the chains may be carried beyond a given point at a
complete revolution of said drum, and means for locking said drum as against
complete rotation save in one direction, substantially as set forth.
5. In an indicating lock, the combination of a series of endless sprocket chains
of unequal lengths, all chains composed of links of the same size bearing numbers
or characters upon their faces, and a series of supports and a sprocket drum around
which said chains are carried, substantially as set forth.
6. In an indicating lock, the combination of a series of endless sprocket chains
of unequal lengths, all chains composed of links of the same size bearing numbers
or characters on their faces, a series of supports and a sprocket drum around
which said chains are carried, and means for locking said drum as against complete
rotation save in one direction, substantially as set forth.
7. In an indicating lock, the combination of a series of endless chains of
unequal lengths and all composed of links of the same size having thereon numbers or
characters, a series of supports and a drum around which said chains are carried
in unison, the number of links in each chain carried beyond a given point by the
complete revolution of said drum being indivisible into the number of links in any
one of said chains, and means for locking said drum as against complete rotation
save in one direction, substantially as set forth.
8. In an indicating lock, the combination of a series of endless chains of unequal
lengths and all composed of links of the same size, having thereon numbers or
characters, a series of supports and a drum around which said chains are carried
in unison, said drum provided with a plurality of equi-distant grasping portions
whereby said chains are uniformly and positively carried, the number of links in
each chain carried beyond a given point by the complete revolution of said drum
being indivisible into the number of links in auy one of said chains, and means
for locking said drum as against complete rotation save in one direction, substantially
as set forth.
9. In an indicator lock as described, the combination of the rotary drum 2
provided with hub 17, the toothed wheel and ratchet wheel secured to said hub,
the spring-actuated dog having its nose in normal engagement with said toothed
wheel, a yoke frame surrounding said wheels and dog and capable of a sliding
movement within the lock casing and having a spur 21 within the field of move-
ment of said ratchet and provided at its forward end with a gate, and a shoulder
and projection on opposite sides of said gate, the bolt carried by the forward
extremity of said yoke, the spring confined between said dog and yoke, the shackle
pivoted within the lock casing and having a notched nose with which said bolt is
capable of engaging, and the vertically movable resilient head 36, substantially as
set forth.
10. The combination of the casing, the rotatory drum suitably journaled therein
and provided with a hub, the toothed wheel 18 and ratchet wheel 19 secured to
said hub, the pivoted dog 26 having its nose capable of engaging with the teeth
in the wheel 18, the yoke frame 20 surrounding said wheels and dog and capable
of a sliding movement and provided with spur 21, gate 33, projection 3%,
shoulder 34, and bolt 25, a spring for normally projecting the nose of said dog

page_text: hetween the teeth of the wheel 18 and for normally advancing said frame to
locking position, the shackle pivoted within the lock casing and having its nose
provided with a notch 24 with which said bolt is adapted to engage, the pin 35
extending vertically through the lock-casing and having a free movement therein
and provided at its upper extremity with a head-36. and the spring 37 having a
bearing against the under side of said head, whereby the latter is normal'y projected
upward, substartially as set forth.
11. The rotatory drum 2, hollow at its lower end and provided with notched hub 9
which extends through the bottom of the casing, and the casing provided with
guide slots at predetermined points with which said notches successively register,
a key with two wards one longer-than, the other, the shorter ward being wholly
contained within one of the notches in said hub while the longer ward extends
beyond said hub, and will, when the latter is rotated, be carried beneath said casing
and thence into abutment against the outer wall of one of said guide slots,
substantially as set forth.
12. The combination of the hub 17 having secured thereto the toothed and
ratchet wheels, the resilient yoke frame surrounding said wheels and having a
sliding movement within said casing and provided with a spur which is within
the field of movement of said ratchet wheel, whereby, when the latter is
revolved, said frame will be forced backward against its resiliency, the
pivoted resilient dog having its nose in normal engagement with the toothed
wheel, the bolt carried by said frame, the shackle pivoted to the lock casing and
having a notched nose capable of being engaged by said bolt, and the vertically
movable resilient head immediately below said shackle nose, substantially as set
forth.
.13. The combination of the hub having secured thereto the toothed wheel and
ratchet wheel, the yoke frame within said casing and capable of a sliding movement
and having at its forward end a gate and provided with a shoulder and a projection
on opposite sides of said gate, the pivoted dog, and the spring whereby said frame
is normally advanced and the dog operated to bring its nose into engagement with
said toothed wheel and its tail immediately in the rear of said projection,
substantially as set forth.
14. The combination of the pivoted shackle having its nose provided with a
notch, the yoke frame capable of sliding freely and resiliently within the lock
casing and carrying a bolt which engages with said notch, and having at its rear
end a spur, and at its forward end a gate contained between a shoulder and pro-
jection, the hub having secured thereto the toothed wheel and ratchet wheel, and
means for preventing the rotation of said toothed wheel excepting in one direction,
substantially as set forth.
15. In an indicator lock having a key hole, a seal label case formed beyond said
key hole whereby a label when inserted in said case will conceal the key hole, aud
a locking device for said label controlled aad operated by an active element in the
lock during the act of locking, substantially as set forth.
16. An indicator lock having a key hole and a label casing in front of said key
hole whereby a label inserted within said casing will conceal said key hole, and
provided with a vertically movable resilient plunger pin capable of being depressed
by the closing of the shackle and thereby driven through the label to lock the
same, substantially as set forth.
17. The combination of the vertically disposed pin 35 capable of a free movement
within the lock casing and extending through the bottom of the latter, the head on
the upper end of said pin, the spring which bears against the bottom of said head,
the pivoted shackle having a notch in its nose, and the resilient yoke frame
provided with a bolt capable of engaging with said notch to lock the shackle,
substantially as set forth."
18. In an indicator lock having a key hole and a label casing in front of said
key hole whereby a label inserted within said casing will conceal said key
hole, the combination of the pivoted shackle, with the vertically movable

page_text: resilient plunger pin capable of being depressed by the closing of the shackle
and thereby driven through the label to destroy and lock the same, substantially
as set forth.
Dated this 14th day of February 1895.
JENSEN & SON,
77, Chancery Lane, London, W.C., Patent Agents.