Improvements in Pneumatic Dispatch Apparatus.
Year: 1899

page_text: Date of Application, 2nd May, 1899-Accepted, 9th Sept., 1899
COMPLETE SPECIFICATION.
Improvements in Pneumatic Dispatch Apparatus.
I, BIRNEY CLARK BATCHELLER. of 1518, North 15th Street, Philadelphia,
Pennsylvania, United States of America, Mechanical Engineer, 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:-
My invention relates to pneumatic despatch apparatus and particularly to that
portion of such apparatus which has for its function the introducing of a carrier
into a transit tube, either at a terminal or intermediate station of the line, my
object being primarily to provide a sending apparatus, that is to say, a device
by means of which a carrier is fed to the tube with an actuating device by which
a single motion operates the sending apparatus and provides for its return to its
non-active position automatically after, and only after, the carrier has left the
sending apparatus.
In its preferred form my invention consists in the combination of a sending
apparatus or device, an actuating lever to operate the same, a laich to hold the
lever operative position, and latch releasing mechanism arranged to be
actuated by the exit of a carrier from the sending apparatus. My invention
further consists in various details of construction and combinations of mechanism
which will be best understood as described in connection with the drawings in
which my invention is illustrated, and in which
Figure 1 is a side view of a sending apparatus adapted for use at an inter-
mediate station on the main transit tube and provided with my improvements.
Figure 2 is a front view of the sending apparatus with the improved parts
shown as on the section line 1-1 of Fig. 1.
Figure 3 is a plan view of a portion of the lever lock releasing mechanism.
Figure 4 is an end view of this mechanism partly shown as on the section
line 22 of Fig. 3.
Figure 5 is a perspective view of a detail of the mechanism.
Figure 6 is a view similar to that shown in Fig. 2 but illustrating a modi-
fication of my device.
Figure is a cross sectional view taken as on the line 3-3 of Fig. 6 showing
a detail of construction.
Figure S is a plan view of a portion of the lever lock releasing mechanism
constructed in accordance with the modification of Fig. 6.
Figure 9 is an end view of this mechanism.
Figure 10 an enlarged view of a portion thereof.
Figure 11 a cross-sectional view taken as on the line 4-of Fig. 10.
Figure 12 is an enlarged sectional view of the portion of the lever lock actuat-
ing mechanism and also of the valve and its connections upon which, in the
construction shown in the drawings, the actuating lever directly operates.
Figures 13, 14 and 15 are sectional views of a third modification in the lever
lock actuating mechanism, the three views exhibiting the mechanism in three
different positions which it assumes in the act of operation.

page_text: Fig. 16 is an elevation showing a modified form of my invention.
Figs. 17 and 18 details of the mechanism shown in Fig. 16 and
Figures 19 and 20 side and front elevations of a very simple embodiment of
the broader idea of my invention.
indicates a transit tube, which, in the construction illustrated, is interrupted,
space being left between its two ends for the movable sectional tubes D2 and D'
supported on the swinging arms DD which arms are pivoted on the rod or
shaft (( supported on the standards CC. The normal position of the parts is
that shown in Figs. 2 and 6 in which the main tube section D registers with
the interrupted ends of the main tube forming in effect a part of the normal
tubular system and in which the other sectional tube D2 lies in position as shown
to receive a carrier which it is desired to insert in the transit tube. The par-
tions of the swinging frame lying between the sectional tubes and flush with
the interrupted ends of the main tube are flat and fit against the
interrupted ends of the main tubes so as to close them when this web portion
is opposite to them, and the portions (extending out from the standard Care
flat and fit nicely against the ends of the tube section D' when it is moved out of
registry with the main tube. B is a by-pass connecting the interrupted sections
of the main tube A around the sending apparatus and giving free passage to
air at all times so that the motion of carriers in the system will not be interrupted
by the temporary interruption of the conduit A caused by the action of the
sending apparatus.
As shown, the swinging frame D. except in Figs. 19 and 20 is actuated by
means of a piston in a cylinder E. the piston rod 12 being connected to a
Croshead E sliding in a guide E and through a connecting rod with an
arm sccured, as shown, to the tube D. The admission and exhaust of motive
Huid, preferably compressed air which may be drawn directly from the transit
tube, is governed except in Fig. 16 by the movements of a piston valve 12 in a
easing shown in section in Fig. 12, the motive fluid coming from a supply
pipe and the valve rod extending in one direction, as indicated at F, to an
attached head F1 having, as shown, a perforation F formed in it through which
and the guideway in which the head moves a locking bolt can be inserted al
will to prevent motion of the stem and valve. In the other direction the valve
stem extends, as indicated at F through a cylindrical box in which, as
shown, is situated a hollow cylindrical plunger having, as best seen in Fig. 7,
pin or trunnion like extensions extending outward through slots F in the
box F A spring is arranged to hold the plunger F normally at the end of
the box, as shown in Fig. 12, and another spring extends from the hollow of
the plunger to a ring preferably adjustably secured on the valve stem, as
indicated at 1.
To the pins or trunnions F" are connected the forked arms GG of the send-
ng lever which is pivoted at (as shown and which, when moved toward the
eit forces the plunger forward or inward in the box compressing the
springs and Fand, through the latter spring, pushing the valve rod toward
the right and shifting the position of the valve to that in which it will effect a
mostment of the piston and of the sending apparatus if the valve is at the
the free to move, a condition which, in the particular arrangement shown in
the drawings, may not exist, either by renson of a locking pin being inserted
through the hole F, or by reason of the locking lug X (see Fig. 6) being by
the action of the device indicated at Y forced over so as to rest against the
sliding block F
In the features above described the apparatus shown in my drawings is sub-
stantially like that shown in my prior American Patents dated Dec. 21st, 1897,
and numbered 595.751 and 595,754, in which patents the locking device indicated
at X and Y in Fig. 6 of my drawings is fully shown and described. In illus
trating this part of the mechinism I do not wish to be understood as in any way
limiting my invention upon its employment because while its mechanism is well

page_text: adapted for the purpose, my invention, as will be obvious, is adapted for use
with any sending mechanism.
As shown by my prior American patents above referred to the actuating lever
of the sending apparatus is provided with a locking segment by which it can be
secured either in operative or nonoperative position, but the locking mechanism
is of such a kind as to require manipulation by the operator to change the posi-
tion of the lever, and, as briefly stated above, it is an object of my present
invention in its best form to make the return of the sending lever to nonoperative
position automatic, relieving the operator of all further care after he has latched
the lever in its sending position. in which position it will remain through what-
ever period is required for the release of the locking device provided to prevent
motion in the sending apparatus, and through whatever time, also, may be
required for the sending apparatus to move to its designed position to bring the
new carrier into line with the transit tube, and until the carrier has actually
escaped from the sending apparatus into the transit tube.
My preferred form of mechanism for acting upon the lever to latch and
unlatch it is that shown in Figs. 1 to 5 inclusive in which H H is the locking
lever pivoted at H', the end H being arranged when thrust up to rest against the
crossbar Gª of the sending lever and latch it in operative position, while to the
end I is connected a spring which normally acts to press the arm H into posi-
tion to engage the lever as shown. In Fig. 2 a rod I is directly connected to the
end of the arm H³ and to a piston 3 working in a cylinder having a port
leading into its end and another port J leading through its side in position to
be uncovered by the piston when it moves to the right, and covered and closed
by it when it moves to the left. The spring acting upon the lever lock is
indicated at K, its normal action being not only to press the active end of the
lock lever upward but also to press the piston ja toward the left and thus to
close the port JF. The arm indicated in the drawings is simply a handle
attached to the lever and by which it can be manually operated.
From the port of the cylinder J leads a pipe P, which connects with the
chamber of the valve casing 0 (see Figs. 3 and 4) while a supply pipe Q lead-
ing from the transit tube connects with the chamber in the said casing. From
the other port 2 of the cylinder leads the pipe or conduit N which connects,
as shown, with the top of the cylinder M.
Referring now particularly to Figs. 3, 4 and 5 it will be seen that the ports (1
and 3 of the valve casing O connect with each other through the port 0 and
also that a cylindrical passage 03 leads out of the chamber (, as best shown in
Fig. 4. is a valve stem extending through the chamber to the outside of
the casing as shown, and connected at its inner end with a valve R having
a tubular extension R which extends from the valve R' through the chamber K
and fits in the cylindrical passage 0. Ports Rare formed through this tubular
portion of the valve in position, as shown, to open into the chamber 03 when
the valve R is seated thus connecting said chamber with the passage 07 while
the lifting of the valve R' from its seat forces said openings R'back into the
cylinder thus cutting off communication between said cylindrical opening and
the chamber 02 R' is a spring acting to normally hold the valve Ri seated, as
shown in Fig. 4.
I is a rock shaft to which is attached a finger L' which by the action of a
Spring LP, as shown, coiled round shaft L, is normally held so as to project up
into one of the tube sections A as indicated in Fig. 1, 2 and 6, the passage of
a carrier pressing such finger down and causing a corresponding motion in the
shaft L. while, after the passage of the carrier. the parts are returned to normal
position by the action of the spring L 1 (see Figs. 3 and 4) is an eccentric
attached to the shaft L and to which by means of the eccentric strap L', is con-
nected the valve actuating rod L L. the operative end Le of which is grooved
out as shown so that under certain conditions it will pass below the end of the
rod R which rod will lie in the groove. Li is a slotted extension on the top of

page_text: the valve actuntiing rod and by means of which and the pin Mº, it is attached
to and supported by the piston rod M³ of a piston M' moving in the cylin-
der M, M being a spring which normally holds the piston and its rod in its upper-
most position, as shown in Fig. 4 in which position the end of the rod L1 lies
opposite to the valve rod R and in position to actuate such valve rods.
Fig. 4, indicates an opening through the lower part of the cylinder M through
which air can freely escape.
M³,
The operation of the mechanism is readily followed: A carrier being inserted
in the sectional tube D2, the operator takes hold of the sending lever Gand
moves it outward until it is engaged by the operative end II of the lever I H
This motion of the lever permits the spring K not only to effect the latching of
the lever but to force the piston to a corresponding position, that is to say, as
shown, for instance, in Fig. 2. to the left hand end of the cylinder and having
moved it the operator need concern himself no more about the mechanism and,
immediately after any locking devices in the system have been released, the
motion of the sending lever effects the desired shifting of the sending apparatus.
bringing the tube section D into registry with the transit tube, after which, of
course, the pressure of air forces the carrier out of the sectional tube and into
the transit iube, in which motion it pushes the finger L' down to the position
indicated in dotted lines in Fig. 4 and this motion of the finger acting through
the shaft and eccentric draws the valve actuating rod L L backward so that
its end will clear the end of the valve actuating rod R, as is shown in Figs.
and 4. and, at the same time, the spring M, acting on the piston M' and piston
rod M draws the operative end L of the actuating rod upward so that it lies
opposite to the end of the piston rod R. As soon as the carrier has passed over
the finger the spring 12 causes it and its attached mechanism to return to
normal position and the consequent motion of the eccentric forces the actunt-
ing rod L L outward until the end Le impinges against the end of the rod It.
lifting the valve from its seat and causing the tubular portion R³ of the
valve to move into the cylindrical passage 0 to a distance sufficient to close the
ports . The motive fluid (compressed air) will then pass from the supply pipe Q
through the chamber and passage 0 into the chamber 03, thence, through
the opening 0 in said chamber into the conduit P. from which (see Fig. 2) it
passes into the end of the cylinder J and acting against the piston J forces said
piston to the position shown in Fig. 2, depressing the lever-lock and releasing
the actuating lover G, which immediately returns to the position in which it
lies above the lock lever. The described motion of the piston opens the
port J in the cylinder I through which, and the connected conduit N, the com-
pressed air passes into the head of the cylinder M as shown through the open-
ing M the air pressure acting against the piston M' forces it down in the cylin-
der M and the piston rod M therefore forces the end L of the connecting
rod L L down until it ceases to abut against the end of the rod R whereupon
the spring causes the return of the valve RR to the position shown in
Fig. 4, the end of the valve rod R moving backward through the recessed portion
of the end L. This receding of the valve not only cuts off the supply of com-
pressed air to the cylinder J, but opens the conduit P to the atmosphere through
the valve chamber 02, the ports R, the hollow valve R and the passage 01, so
that the pressure in the cylinder J and ports connected therewith rapidly falls
to atmospheric pressure and the apparatus is in condition to again engage the
sending lever when it is moved to an operative position.
In Figs. 13, 14 and 15, T have illustrated a modification of the valve mechanism
for admitting and exhausting compressed air to the cylinder J. the valve casing
in this construction is indicated at T, and has formed in it, a port T which con-
nects with the conduit Q and a port T3 which connects with the conduit P, both
of said ports connecting also with a cylindrical passage in the easing and, prefer-
ably, lving directly opposite to each other as shown. The cylindrical passago
referred to, and indicated at T7, is enlarged into an annular space T which con-

page_text: nects with the atmosphere through a port T, and a further enlargement is indi-
cated at where the casing is formed into a cylinder, the outer head of which
forms a chamber T with which connects the pipe X as shown. T is a pin extend-
ing through the tubular bore T for purposes to be hereafter described. U is a
tube section fitting in the tubular bore T of the casing T and having slots U¹
through which the pin T passes. In the tube are formed the ports is and U³
which in one position, that indicated in Fig. 15, register with the ports T and T³.
Other ports U and Us are formed through the tube as shown, while at its extreme
end additional ports as indicated at 7 are provided at or near the point where
the end of the tube connects with the piston indicated at U and moving the
cylinder T In this modification of my apparatus the finger 1 and the rock
shaft to which it is attached are constructed as already described, but, in place
of the eccentric L. I here employ a lever arm 1 which is, of course, the mere
equivalent of the eccentric, and which, by means of a connecting rod L. is
attached to a plunger L which fits in the tube and is provided as shown with
a slot L through which the pin 18 passes. The plunger is formed with a port S
leading through it and adapted, in the position shown in Figs. 13 and 15, to come
opposite to the ports T and T, and with this port or passage S, is connected the
port or passage S', coming opposite to the enlargement 13 in the valve chamber.
The normal position of the parts is that shown in Fig. 13 in which, it will be
observed, the supply pipe Q is cut off from connection with the valve casing by
the position of the tube U, while the pipe P is in free communication with the
atmosphere through the port T3, the port U, the passages S and S, the port U³,
the enlarged passage T3 and the exhaust port T. The depression of the finger L'
by the outgoing carrier thrusts the plunger L10 inward as shown in Fig. 14, the
shoulders L pressing against the end of the tube U and pressing it also inward
until its parts U and C register with the ports and T while its port comes
opposite to the space T3 and the piston attached to the end of the tube is
moved over to the left hand end of the cylinder T. The return of the finger L'
to its normal position by the action of the spring on the rock shaft draws back
the plunger Lo to the position indicated in Fig. 15, but leaves the tube U and
its vision U in the position to which they were moved as described in connection
with Fig. 14. The compressed air then passes freely from the pipe Q through
the ports T. 1. S. . and T to the pipe P and thence into the cylinder J
where it operates to move the piston J as already described and, after the piston
has been moved. permits the compressed air to flow through the pipe N into the
chamber T where acting against the piston U it forces said piston and the
tube U, to which it is connected, into the position indicated in Fig. 13 cutting
off the supply of compressed air and opening the pipe P to the atmosphere as
already described.
Referring next to the modification illustrated in Figs. 6 to 11 inclusive. I
would premise my description by saying that this modification differs from the
forms already described in dispensing entirely with pneumatic means for actual-
ing the lever lock, substituting purely mechanical devices for this purpose and
while, in a broad sense, this mechanical device is an equivalent to and a mere
modification of my invention as shown in the forms already described it also
embodies features of construction invented by me which, as they are alternative
to the pneumatic system specifically claimed in this application, will therefore
form the subject matter of another Application for Letters Patent.
Referring again to the drawings it will be seen that no cylinder J is con-
nected with the lever-lock H H but that a spring indicated at K is employed
having the same action on the lever lock as the spring K shown in connection
with the cylinder J. From the end of the arm of the lever lock extends, in
place of the piston rod I of the other construction. a rod I which connects with
a short arm W of a bell crank lever, the other end of which is indicated at W
and which is pivoted at W, and to the arm W of this lever is connected the

page_text: rod W, moving in suitable guides and having attached to it the block W in which
is formed the notch W. The rock shaft L which, together with the attached
finger L is similar to that described with respect to my former constructions,
extends at right angles to the rod W and has attached to its end the head V
which lies immediately above the notched block W and is formed to provide a
pivot pin at one extremity and a pin 12 at its other extremity. V is a
bell crank lever pivoted on the pin and connected as by a spring V with a
pin V, the action of the spring being to draw the arm against the centre of
the head V. as shown in Fig. 10, holding the arm in normal position of the
parts, in the position indicated in Figs. 10 and 9, that is, lying above and
parallel with the upper surface of the block W. When the finger is depressed
and the rock shaft correspondingly moved, the head V. moving with the rock
shaft and carrying the bell crank lever with it, presses the arm V', down
upon the horizontal surface of the block W₁ and, at the same time, moves it
toward the right as shown in Fig. 9 until its end comes opposite to the notch W
into which the action of the spring forces it. The release of the finger by the
passage of the carrier causes it and the rock shaft to resume their normal posi-
tion, the spring L acting therefore to turn the arm to the left as shown in
Fig. 9 and thereby forcing the rod W in this direction, netuating the bell crank
lever WW and the rod 1 and, through this rod, the lever lock 11 11³, the
end of which is depressed so as to release the sending lever G. the further
movement of the rock shaft lifting the end of the lever arm out of the
noteh Wenables the spring K to netuate the lever lock to engage the lever
when it is next moved to an operative position.
In the various modifications of my inventions hereinbefore described, the send-
ing lever, having a yielding connection with the controlling valve of the actuat-
ing cylinder, has formed an element, and for obvious reasons I prefer and recom-
mend its use my invention, however, in this broader sense, does not necessarily
involve the presence of this lever or indeed of an actuating cylinder, and in
Figs. 16 to 20 I have illustrated further modifications of my invention, the one
illustrated in Figs. 16 to 18 showing a construction in which the sending lever is
dispensed with but an netuating cylinder still employed, while the one illustrated
in Fig. 19 and 20 illustrates a construction in which the operator acts directly
upon the sending apparatus without the intervention of an actuating cylinder.
Referring first to the construction shown in Figs. 16 to 18, it will be seen
that the sending apparatus, the valves and M, the connections to and from
these valves, and the mechanism directly connected therewith, is the same in
all essential particulars as shown and described in connection with my preferred
and most perfect form of apparatus. In place however of using the governing or
controlling valve I lead a connection, indicated at .r., from a source of fluid
pressure, as shown, from the pneumatic tube to the rear end of the cylinder E
and place in this connection a valve casing and three way cock ª by means
of which the end of the cylinder E can be placed in connection with a source of
fluid pressure, or connected to the atmosphere to exhaust, as indicated in the
sectional view, Fig. 17. The pipe 1' leading from the valve chamber ( branches,
as indicated at PT P, the branch entering the head of the cylinder E and the
branch entering the chamber y'. In a casing y, having formed in it a second
valve chamber, connected with the first by the passage y. which passage is
adapted also, as shown, to serve as a valve sent in the head of the chamber y',
is formed another chamber y counceling freely with the atmosphere through
passages and also with a short cylindrical chamber y y' is a valve stem
extending through the lower head of the cylinder E and secured to a valve y
adapted to seat itself, as shown, in the passage y', the valve stem being con-
tinued in tubular form through the chambery and into the chamber y'. the
tubular stem being connected through passage with that face of the valve
which is open to the chamber y, and the tubular portion y of the valve stem

page_text: being of a diameter which fits neatly in the cylindrical chamber y. A spring y"
acts to hold the valve closed when conduit N, leading from the top of the
casing M, connects, as shown, with the chamber y³.
The operation of the above described construction is as follows: the normal
position of the parts is that indicated in Fig. 16, and when a carrier has been
inserted in the sending tube D³ the operator turns the cock admitting air
through the piper into the lower head of the cylinder E and forcing the piston E¹
forward until the sending tube D registers with the transmission tube. After
admitting sufficient compressed air into the cylinder to perform this work, the
operator returns the cock to its normal position, that shown in Fig. 17, which
permits the air to exhaust freely from the cylinder E. The operation of the
carrier on leaving the sending tube is, as before described, to depress the
finger L, and through precisely the combinations of mechanism already
described, to connect the supply pipe Q with the pipe P admitting the compressed
air through the pipe 1" into the upper head of the cylinder E and forcing the
piston Eback to the position shown in Fig. 16. The compressed air is of course
also admitted into the chamber y through the branch pipe P, but as that
chamber is closed by the valve y no effect is produced by the initial admission
of pressure fluid to the chamber. As the piston approaches the lower end
of the cylinder it strikes against the projecting end of the valve stem y press-
ing the valve y into the chamber y' and opening the passage y³, and at the same
time, the end of the hollow stem y enters the cylindrical chamber y which
prevents any escape of the motive fluid into the chamber y'. The valve being
opened the pressure fluid flows from the branch pipe I through the chambers y
and y into the pipe N and thence into the head of the cylindrical casing M,
acting on the piston M³, as already described, and through its action closing the
valve in the casing 0.
As soon as the piston E moves away from the lower end of the cylinder E. the
spring y returns the valve to its seat bringing the parts to the position shown
in Fig. 18 whereupon any pressure fluid remaining in the casing M and pipe N
will escape freely through the chamber, the ports y, the hollow valve stem y",
the chamber y and the open passages y
The construction shown in Figs. 19 and 20 presents my invention in perhaps
its simplest form. The sending apparatus in this construction is operated by a
lever connected securely to the frame 1) and a latch or bolt is provided in
position to engage a detent and hold the sending frame in position when the
sending tube D registers with the transmission tube, indicates a spring which
operates to thrust the bolt or latch = upward. The bolt is provided with a pin
which extends into a slot in a bell crank lever arm, the other arm of which
lever is indicated at and the pivotal connection of which is indicated at
The depression of the bolt is effected by connecting the arm of the bell crank
lever with the finger L, as indicated in Fig. 19, a lever Z connected to the rock
shaft is connected in turn by a rod with the bell crank lever aforesaid and
so that on the escape of a carrier from the sending tube the depression of the
finger Leffects directly the depression of the bolt or latch releasing the
detent, whereupon a spring, such for instance, as K, restores the sending
apparatus to normal position.
Having now particularly described and ascertained the nature of my said
invention, and in what manner the same is to be performed. I declare that what
I claim is
1. In a pneumatic despatch tube system the combination with a transit tube of
a sending apparatus whereby a carrier can be injected into the tube, a lever
arranged to actuate said sending apparatus, a lock arranged to hold said lever in
position to act on the sending apparatus, and means for releasing the lever from
the lock situated in the transit tube close to the sending apparatus and actuated
by the escape of a carrier from the sending mechanism.

page_text: 2. In a pneumatic despatch tube system the combination with a transit tube of
a sending apparatus whereby a carrier can be injected into the tube, a lever
arranged to actuate the sending apparatus, a resilient connection arranged
between said lever and the sending apparatus, a lever lock arranged to engage
and hold the lever aforesaid in position to actuate the sending apparatus, and
means for releasing the lever from the lever lock actuated by the escape of a
carrier from the sending apparatus.
3. In a pneumatie despatch tube system the combination with a transit tube of
a sending apparatus whereby a carrier can be injected into the tube, a lever
arranged to netuate the sending apparatus, a resilient connection arranged
between said lever and the sending apparatus, a lock or locks arranged to prevent
the movement of the sending apparatus under certain conditions, a lever lock
arranged to engage and hold the lever aforesaid in position to actuate the sending
apparatus and means for releasing the lever from the lever lock actuated by the
escape of a carrier from the sending apparatus.
4. In a pneumatic despatch tube system the combination with a transit tube of
a sending apparatus whereby a carrier can be injected into the tube, a lever
arranged to actuate the sending apparatus, a resilient connection arranged
between said lever and the sending apparatus, a lock or locks arranged to prevent
the movement of the sending apparatus under certain conditions, a lever lock
arranged to engage and hold the lever aforesaid in position to actuate the send-
ing apparatus, a finger arranged in the tube at the outlet of the sending appa
ratus, resilient means for holding said finger normally in position to be engaged
by a carrier and return it to such position after being depressed, and means
actuated by the return of said finger arranged to withdinw the lever lock,
5. In a pneumatic despatch tube system the combination with a transit tube
of a sending apparatus whereby a carrier can be injected into the tube, a lever
arranged to actuate the sending apparatus, a resilient connection arranged
between said lever and the sending apparatus, a lever lock arranged to engage
and hold the lover aforesaid in position to actuate the sending apparatus, means,
as a spring acting to normally press the lever lock into position to engage the
lever, a pneumatic cylinder and piston arranged to disengage the lever-lock from
the lever, a conduit for motive fluid leading from a source of supply to said
cylinder, a valve or valves in said conduit arranged to regulate the
passage
fluid therethrough and means arranged to be actuated by the exit of a carrier
from the sending apparatus for operating said valve or valves.
of
6. In a pneumatic despatch tube system the combination with a transit tube of
a sending apparatus whereby a carrier can be injected into the tube, a lever
arranged to actuate the sending apparatus, a resilient connection arranged
between said lever and the sending apparatus, a lock or locks arranged to prevent
the movement of the sending apparatus under certain conditions, a lever lock
arranged to engage and hold the lever aforesaid in position to actuate the send-
ing apparatus, means, as a spring, neting to normally press the lever lock into
position to engage the lever, a pneumatic cylinder and piston arranged to dis-
engage the lever lock from the lever, a conduit for motive fluid leading from a
source of supply to said cylinder, a valve or valves in said conduit arranged to
regulate the passage of fluid therethrough and means arranged to be actuated by
the exit of a carrier from the sending apparatus for operating said valve or
valves.
7. In a pneumatic despatch tube system the combination with a transit tube
of a sending apparatus whereby a carrier can be injected into the transit tube,
a motor for actuating said sending apparatus, a power controlling device for
regulating the operation of said motor, an actuating lever having a resilient con-
nection with said controlling device and a lock to secure it in position to actuate
said controlling device, means, as a spring, neting to normally press the lever-
lock into position to engage the lever, and means for operating the lever lock to
release the lever actuated by the escape of a carrier from the sending apparatus.

page_text: S. In a pneumatic despatch tube system. the combination with a transit tube
of a sending apparatus whereby a carrier can be injected into the transit tube. a
motor for actuating said sending apparatus, a power controlling device for
regulating the operation of said motor, an actuating lever having a resilient con-
nection with said controlling device and a lock to secure it in position to actuate
said controlling device, means as one or more locks for temporarily preventing
the motor controlling device from moving under the resilient pressure of the
lever, means, as a spring, acting to normally press the lever-lock into position to
engage the lever, and means for operating the lever-lock to release the lever
actuated by the escape of a carrier from the sending apparatus.
9. In a pneumatic despatel tube system the combination with a transit tube
of a sending apparatus whereby a carrier can be injected into the transit tube, a
motor for actuating said sending apparatus, a power controlling device for
regulating the operation of said motor, an actuating lever having a resilient
connection with said controlling device and a lock to secure it in position to
actuate said controlling device, means as one or more locks for temporarily pre-
venting the motor controlling device from moving under the resilient pressure
of the lever, means, as a spring, acting to normally press the lever-lock into posi-
tion to engage the lever, a pneumatic cylinder and piston arranged to disengage
said lock from the lever, a conduit for motive fluid leading to said cylinder, a
valve or valves in said conduit regulating the passage of fluid therethrough and
a trip arranged to be operated by the exit of the carrier from the sending appa-
ratus and to open said valve or valves to admit motive Huid to the lock cylinder.
10. In a pneumatic despatch tube system the combination with a transit tube
of a sending apparatus whereby a carrier can be injected into the transit tube, a
motor for actuating said sending apparatus, a power controlling device for regu-
lating the operation of said motor, an actuating lever having a resilient con-
nection with said controlling device and a lock to secure it in position to actuate
said controlling device, means as one or more locks for temporarily preventing
the motor controlling device from moving under the resilient pressure of the
lever, means, as a spring, acting to normally press the lever-lock into position
to engage the lever, a pneumatic cylinder and piston arranged to disengage said
lock from the lever, a conduit for motive fluid leading to said cylinder, a valve
or valves in said conduit regulating the passage of fluid therethrough, a trip
arranged to be operated by the exit of a carrier from the sending apparatus and
to open said valve or valves to admit motive fluid to the lock cylinder, and
mechanism for closing said valve actuated by the motion of the lever lock or
attached device.
11. In combination with a pneumatic despatch tube, a sending apparatus
whereby a carrier is injected into said tube. a lever for actuating said apparatus,
a lever-lock for latching said lever in operative position, a pneumatic cylinder
as J having a supply conduit as P and an exhaust conduit as N leading therefrom.
a piston working in said cylinder arranged to move the lever-lock to release the
lever and thereafter to open the exhaust port of the cylinder. a valve in the supply
conduit. means actuated by the passage of a carrier from the sending apparatus
arranged to open said valve and admit fluid to cylinder and means actuated by
fluid exhausting from said cylinder arranged to effect the closing of said valve.
12. In combination with a pneumatic despatch tube, a sending apparatus
whereby a carrier is injected into said tube, a lever for actuating said apparatus,
a lever-lock for latching said lever in operative position, a pneumatic cylinder
as J having a supply conduit as P and an exhaust conduit as N leading there-
from, a piston working in said cylinder arranged to move the lever-lock to
release the lever and thereafter to
open the exhaust port of the
cylinder, a valve casing in the supply conduit, a valve ag R' Re
situated in said casing arranged when closed to cut off the supply
of motive fluid and to open the pipe P to the atmosphere, a valve
actuating rod L LA elastic means tending
hold said rod in
to

page_text: position to actuate valve RR, a cylinder M and piston M¹ connected to said
rod and arranged when actuated to push said rod out of operative position, a
finger as arranged when actuated by a carrier to withdraw rod L L from
operative position and a connection as specified between conduit N and cylinder M.
13. In a pneumatic despatch tube system, a sending apparatus adapted to move
into registry with the tube to inject a carrier therein and to move out of registry
therewith, to receive a carrier and means situated in the transit tube close to the
sending apparatus and actuated by the escape of the carrier for effecting the return
of the sending apparatus to receiving position.
1
1000
EDWARDS AND CO..
Chartered Patent Agents, 65 and 66. Chancery Lane, London,
Agents for the Applicant.