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Патент USA US2129324

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SePt- 6, 1938.
Filed Dec. 19, 1935
Henry VanCa/i //'0//§md
Patented Sept. 6, 1938
Henry Van Oott Holland, West?eld, N. .L, as
1 signor to The International Postal Supply Com
pany, Brooklyn, N. Y., a corporation of New
Application December 19, 1935, Serial No. 55,254
2 Claims.
(Cl. 70-186)
This invention relates to locks and more par—
ticularly to looks of the reciprocating bolt type
in which a plurality of bolts are employed. Spe
ci?cally, the lock comprises a number of parts
designed to be actuated successively, the oper
8 .
ation of opening the lock depending on proper
actuation of the parts by a suitable key.
In the embodiment of the invention herein
illustrated the lock is applied to the meter mech
10? anism of ‘a so called “prepaid postage” machine.
In addition to its function as an unlocking means
the key also acts to hold the meter in positive
engagement with the machine base better to in
sure engagement of the operating parts.
It is recognized that expert locksmiths by
“feeling” with suitable implements, are fre
quently able to gage the lift of pins in locks
wherein a plurality of reciprocable pins and ro
tary tumblers are used. It is also well known
20 that certain types of reciprocating bolt locks may
be picked with little or no difficulty. However,
in most cases, it is only necessary that two suit
able implements be employed to get the proper
feel of the lock thus to enable one to open the
25 look without a key or to gage the measurements
for duplicating the proper key. In order to ob
viate the possibility of enabling a person to open
the look by obtaining the feel of only two parts
the present lock utilizes no less than three parts,
30 each "of which must be manipulated, and in the
proper sequence, before the mechanism can be
unlocked. Thus, it is practically impossible with
two hands to obtain the feel of the combined
parts, the lock on this account hindering un
authorized actuation.
The invention is described in detail in the
following description thereof in which reference
is had to the accompanying drawing wherein
Fig. 1 is a partial side elevation of a postage
A meter machine to which the lock is applied, parts
thereof being broken away to illustrate the re
spective positions of the parts;
Fig. 2 is an enlarged front elevation of the
lock shown in Fig. 1;
Fig. 3 is a side elevation of the lock;
Fig. 4 is a partial front elevation of a modi?ed
form of lock;
Fig. 5 is a section taken on line 5-5 of Fig. 4;
Fig. 6 is a perspective view of the end of the
50 key; and
Fig. '7 is a section taken on line 1-‘! of Fig. 1;
In the drawing the base of the postage machine
is indicated at l I, the mechanism for driving the
parts not being shown because it forms no part
of the present invention. It is suf?cient to state
that a motor or hand crank operates through
gear I2 to turn shaft l3 which in turn rotates
shaft I4. A suitable connection between shafts
l3 and I4 is indicated at I5, this connection in
the present instance comprising an elongated key
on the end of one shaft and a slot in the end of
the other shaft. The meter is housed in housing
i6 and is permanently geared to shaft [4. This
housing and the meter contained therein are re
movable from the machine base and operating 1-0
mechanism attached to the base.
It is to be understood at the outset that, al
though the lock is shown and described as form
ing part of a speci?c machine, viz; a postage
metering machine, it is in nowise limited in its
use to a machine of this character. However,
to enable a clear understanding of its use and
operation it is illustrated in its application to
this type of machine. It is therefore appropriate
to state that, when the meter is removed from 20
its base, the shaft I4 is locked against unauthor
ized use of the printing mechanism attached to
the shaft, the die normally being approximately
90° removed from an opening I1 in the housing
when the shaft is locked.
The principal members comprising the lock
are a plurality of similarly shaped reciprocable
bars l8, l9 and a bell-crank lever 2| preferably
disposed between bars l8 and I9 and pivoted on
stud‘22. Each of bars l8 and I9 is provided
with slots 23 cooperating with studs 22 and 24
to constrain the bars to move in a limited rec
tilinear path when the bars are moving to or
from looking position.
Furthermore, each bar
is notched, as at 25, a pin 26 on lever 2| coop- -_
crating with the notches when the bars are in
looking position to hold the bars in this posi
tion. Each bar has an angular projection or ?n
ger 21 thereon. Arm or ?nger 28_ on lever 2i,
disposed between the bar ?ngers, is so disposed 40
with respect to these ?ngers when the bars are
in looking position that its edge is spaced from
the edges of ?ngers 21 as shown in Fig. 2. This
is to insure movement of lever 21 by a key prior
to lifting of the bars by the key as will be
hereinafter explained.
In Fig. 2 each bar is provided with a foot 29
engaging a notch 3| in each of two similar rocker
levers 32 pivoted at 33 on the back of the meter
housing back plate 34. A second notch 35 in each 50
lever 32 cooperates with ?ngers 36 in each of two
independently movable bolts 31, 31’, the latter
members being guided in a slot 38 in boss 38
formed integral with the back plate. As shown
in Fig. 2, bolts 31, 31’ engage a slot 4| in shaft 55
I4, thereby preventing rotation of the shaft. As
suming the normal position of the parts to be as
shown in Fig. 2, that is, in locking position, it
will be seen that bars l8 and I9 are held in this
position by springs 42, 43 and that lever 2| is
maintained in the position shown by spring 44.
In Fig. 4 the bars l8, l9 are in substantial
alignment with shaft | 4, thus eliminating the
interposed members 32, 31, 31’; the bars serving
10 as looking bolts.
In this form of the invention
the bars directly engage the shaft and the lock
is represented in its simplest embodiment.
The key for actuating the locking mechanism
is shown in Fig. 6 as a cylindrical shank 45 hav
15 ing a key head 45 thereon, the head comprising a
plurality of spaced parallel plate-like portions 41
connected by a web 48 at one side thereof but
open along its other edge. These plates are so
spaced that they are adapted to cooperate with
20 ?ngers 21, 28 to lift the same when the key is
turned. Fingers 21, 28 lie between a plurality of
parallel plates 49 between which are spacers 5|,
the thickness of the latter being substantially
that of ?ngers 27, 28 so that the ?ngers and
25 plate-like portions. of the key head may engage
each other only if they register with each in a
de?nite predetermined relation. Plates 49 and
spacers 5| are secured to back plate 34 by pins
52. The back plate is provided with a suitably
30 shaped key-hole 53 to permit insertion of the
key. Concentric with the key hole is an arcuate
projection or abutment 54 disposed between the
key-hole and ?ngers 21, 28 to prevent ready ac
cess to the ?ngers except by means of the key.
35 It will be seen from Fig. 6 that the plate-like
portions 47 extend from the shank 45 to the
outer edge of the key whereas the plates. 4'!’ have
a depth substantially equal to that of web 48. A
groove 48' is thus provided to permit the key to
be rotated without interference from projection
In Fig. 1 it will be seen that shank 45 has re
duced portions at 55 and 56. The shoulders at
the ends of portions 55 are engageable with pin
45 51 secured to .a part of base or housing I I’ to
limit longitudinal movement and removal of the
key from base H’. Spring 58 normally forces
the key to the right in this ?gure. The other
reduced part of shank 45 is threaded at 59 to re
ceive nut 5| and is splined to a thumb piece 62 to
permit relative longitudinal movement of piece 62
and the shank. The shank is turned by the
thumb piece, however. A short pin 63 on piece
62 is adapted to enter either of two holes 64, B5,
55 in the back of housing M’. It will be seen that
these holes are approximately 300° apart cor
responding with the degree of rotation necessary
to move the key from its initial position indi
cated in Fig._ l with the key bit disposed ver
60 tically above the shank to the position shown in
Fig. 4 to release the locking bars. Since springs
42, 43 and 44 normally tend to hold the bars in
their locking position it is evident that pin 63
must engage hole 65 to hold the bars in their
released position.
When the meter housing is to be mounted on
the base the key is turned to the position indi
cated in Fig. 1.
The meter is then held in a
position where key-hole 53 registers with the
key head and the parts of coupling | 5 properly
engaged. Thumb nut 59 is turned to draw the
key head against back plate 34. The meter is
thus held ?rmly to the base.
When it is desired to release the locking mech
anism, thumb piece 62 is turned to rotate the
key through approximately 300° from its initial
position in the direction indicated by the arrow 10
in Fig. 4. The key head ?rst engages. ?nger 28
on lever 2 I, releasing pin 2| from notch 25. Fur
ther rotation of the key brings the key head into
engagement with ?ngers 21 on bars I8 and I9,
raising the bars which, in turn, through rockers 15
32, release bolts 31-37’ from recess 4| in shaft I4.
This permits rotation of the shaft. When key 46
is rotated clockwise (Fig. 2), bars l8 and I9 are
drawn down by springs 42, 43 and, due to the
shape of notch 35, the projection 32' on each of 20
the rockers 32 forces bolts 37, 31' into recess 4|,
thus preventing further rotation of the shaft.
It will be apparent that, when the meter and
its housing are removed from the base of the
machine, the key must be turned to permit the 25
locking bolts to fall into locking position. Simi
larly, in order for the machine to operate, the
key must be rotated to release the bolts.
A preferred embodiment of the invention has
been shown and described but such modi?cations 30
as fall within the scope of the appended claims
may be made without departing from the basic
What is claimed is:
l. A look comprising a pair of reciprocable 35
members each having a notch thereon, means
normally urging said members to locking posi
tion, a pivoted lever engageable with said notches
when said members are in looking position, said
members and said lever having projections ex
tending angularly therefrom, and a plurality of 40
spaced parallel plates between which said pro
jections are disposed, the projection on said lever
being engageable by a key to rock the pivoted
member from engagement with said notches, the
projections on said members being thereafter
engaged by continued movement of the key to
reciprocate said members.
2. A look comprising a pair of reciprocable
members each having a notch thereon, means
normally urging said members to locking posi 50
tion, a bell-crank lever pivotally mounted be
tween said members, one arm of said lever having
means thereon engageable with said notches
when said members are in locking position, said
members having projections extending angu 55
larly therefrom in substantial alignment with
the other arm of said lever, and a plurality of
spaced parallel plates between which said other
arm and said projections .are disposed, said other
arm being engageable by a key to rock the bell 60
crank lever from engagement with said notches,
the projections on said members being there
after engaged by continued movement of the
key to reciprocate said members.
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