US758297A

US758297A - Railway signal apparatus.

Info

Publication number: US758297A
Application number: US10132702A
Authority: US
Inventors: Clarence W Coleman
Original assignee: Hall Signal Co
Current assignee: Hall Signal Co
Priority date: 1902-04-04
Filing date: 1902-04-04
Publication date: 1904-04-26
Anticipated expiration: 1921-04-26

Description

BEST AVAILABLE COPY PATENTED APR. 26, 1904.

- -U. W. GOLEM'AN- RAILWAY SIGNAL APPARATUS.

ABPLIOATIOH FILED APR. 4, 1902.

3 SHEBTBSHEET 1.

10 IODEL.

AH ATTORNEY v PATENTBD APR, 26', 1904.-

' c. w. COLEMAN. RAILWAY SIGNAL APPARATUS.

APPLIOATIQR FILED APB. 4,-1902.

I0 IODBL.

BERNIE-SHEET 2,.

M ATTORNEY.

PATENTED APR. 26, 1904.

G. W. COLEMAN.

RAILWAY SIGN-AL APPARATUS. Arrxlzoumn IILBD'APB. 4. 1902.

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- INVENTOR ATTORNEY paratus. IO

nail.

Patented April 26, 1904.

UNITED STATES PATENT- ()FFIQE.

CLARENCE W. COLEMAN, OF WESTFIELD, NEW'JERSEY, 'ASSIGNOR TO THE HALL SIGNAL COMPANY, A CORPORATION OF MAINE.

RAILWAY SIGNAL APPARATUS.

srnczmcanox formin g part dgLetam Patent No. 758,297; dated. s ines, 1eo4.; I Application died April 4, 1902. Serial No. 101,327- (yo model.)

T011112 whom concern.- Beit known that I, CLARENCE W. COLEMAN,

,a citizen ofthe United States, and a resident-of Westfield, in the county of Union and State of New Jersey, have invented certain new and useful Improvements in-Rail way Signal Apparatus; of which the following is a specification.

This invention relates to railway signal ap- The'invention seeks to provide an apparatus characterized by simplicity of construction and efli ciency and reliability of operation. In carrying out this purpose it employs fluidpressure for operating the signal. It is more particularly proposed, h0wever,"to employ liquefied gas stored in a local reservoir in proximity to the signal which when released as-- sumes the gaseous form for performing the required work.

The invention seeksfto provide an eflicient arrangement of valve devices especially designed and arranged for positive and reliable control of fluid-pressure in operating'the sig- The invention also proposes to'provide a suitable system of 'electric circuits for controlling the operation of the signals.

In' the present embodiment of the invention 7 hereinafter setforth the signals are arranged to stand normally at danger, home and distant signals being carried on the same post. The

, signals may, however, be arranged to stand normally at safety, if desired. The invention,

" however, is not in all of'its features limited to such details. Bloreover, the signals have in their best form a normal bias to danger posi tion and when moved from danger to safety position are held from return movement by a retaining device until released.

In the accompanying drawings, forming part of this specification, and in which like re'fer once-numerals designate corresponding parts, Figure 1 is a front elevation of the apparatus 4 when the signal is at dan er artly in section and with parts omitted. Fig. 2 is a side elevation of the apparatus shown in Fig. '1 looking in the direction. from right to left of Fig. 1. a Fig. 3 is a sectional plan view'on theline of Fig. 1 with the frame partly broken away. Fig. 4 is afront elevation shdwing a device for increasing the leverage of the motor -in connection with the home anddistant signals, and Fig, 5 is a diagram of the electric usual manner the honie and distant signals 2 and 3, pivoted on the post.

4is aframe, substantially U-shaped, secured to the post, and to which are connected the op erating parts of the fluid-pressure motor. In the present embodiment of the invention duplicate motors are employed for home and distant signals 1 aving the same construction and arrangemen In each of these motors a gaspressure applying' chamber is employed, which, as shown in the drawings, maybe in the form of a piston-chamber and piston.'

'5 is the piston-chamber for the home signal 2, within which works the piston 6, carrying the piston-rod 7, to which is'fixed a hood 8 to inclose the top of the pistorrchamber. The piston-chamber is supplied with gas through the pipe 9, which is connected with the pipe .10, leading to a local reservoir 97, containing theliquefied gas- 11 is an automatic reducing-valve located in the pipe 10 for reducing the pressure in accordance with the requirements of proper operation.-

12'isavalVe-casing connected with the pipe 9 and provided with an exhaust-port 13, controlled by an exhaust-valve l4, and also pro- .vided with asupply-port'controlled by an inlet orsupply valve 15. These valvesare carried on the verve-stem 16, operated by the bell-crank lever 17, carryingvan; armature associated. with the magnet 18.

In the preferred arrangement supply-valve 15 is. biased toward closed position and exhaust-valve 14 is biased toward open position. This may be provided for by the weight of the parts or otherwise.

The valve-casing is alsoprovided witha cut off valve 19, which may be of any suitable form, but which, as shown in the drawings,

is in the form of a diaphragm and which seats against a plate 20 within the valve'casing The cutofi valve 19 has a bias to closed fposition, which may be provided for by the spring 21 on the stem of the cut-off valve. The

cntofl' valve is restrained from closing by a pivoted member or lever 22,Lworking on a p'iivot 23,vand the. lower end of this lever is pivotally connected to the stem of the cut-ofli valve.

The lever 22 is held in position to restrain the cut-off valve 'by means of a suitable locking means or latch or catch, which may bein the form of a dog 24, secured to the frameon-the pivot-pin 25. v

Secured tothe piston-rod 7' is an adjustable block 26, having a 'stud 27, carrying at its outer end the roller 28. The dog 24 has secured to it a downwardly-extending arm 29, whose lower end-is sheared or inclined, as-

, shown'inlFig. 1, and whose'lower end terminates a suitable distance-above the stud 27,

.show-n in Fig. 1.

against return movement. provided with the oifset 34, against which the mitt-ed to fall.

when the piston 6 is in its lower position, as hen the piston rises,the roller-28 works against the arm 29, thereby lifting the dog- .24 to release the lever 22, which thereby causes the cut-off valve 19 to close. The block 26 on the piston rod 7 carries a spring-dog30, which when the piston rises to put the signalto safety, against its roller28 on the arm 2'? works when the piston descends from its upper to its lower position. The purpose of this offset is to'push back the lever 22 into position for engagement by the dog 24.when the latter is per hismovement of the lever 22 of course again, opens the cut-ofi' valve 19. The. arm 33 normally hangs with its ar- -mature against the pole of the magnet 18 and for this purpose is shown as provided with the I counterweight 35.

Of course the retaining device and iasso ciated means may be variously modified without departingfrom the scope of the invention.

36 is a circuit-closer working against a contact 37 and operated by a weighted lever 38, which is controlled by a rod 39. This rod is secured to a bar 40, adapted to work up and 7 down on pin 41, projecting from the upper part of the frame 4. When the block 26 rises,

' it lifts the bar 40, thereby closing

contacts

36 and 37. .These contacts control the move- 'ment of the distant signal to 'safety, and by means of-these contactsthe movement of the distant signal to safety is prevented until after the home signal has gone to safety. This will more fully appear in connection with the circuits hereinafter to be described.

The purpose of the arm 29 is to enable the inflow of gas to 'the piston-chamber 5 tobe cut off before the piston has completed its upward movement, the expansion of the gas previously admitted to thepiston-chamber being relied upon to complete the upward. move ment of the piston. This effects a saving in the uantity of gas consumed in shifting the sign Of course if this advantage is not desired the arm 29 can be omitted. In this case'the cut-off valve would be closed when the-arm 26 rises high enough to lift. the dog 24 from engagement with the arm 22., At this time the signal will be at safety.

A device for increasing the'leverage ofthe motor maybe used in connection with the signal, if desired. Referring now to this device, 42 is ayokefcarriedby an upper extension of the frame 4. A lever 43 is-pivoted at one end to oneside ofthis yoke and at its other end to the signal-rod 44 of the home signal. 45 is a link pivotally connected at its lower end to the piston-rod 7 and at its upper end to a lever 46. The'lever 46 is pivoted at one end to the extensionof the frame 4 and at its op-. posite end carries a roller 47, bearing against the lower sideof the lever 43- intermediate the ends of the lever 43.

When the signal is at danger and the piston in its lower posi tion, as shown in Fig. 1, the

levers

43 and 46 are in the position shown in Fig. 1. When the piston rises to put the signal to safety, the lever 46 is inclined upward, lifting the lever ,43 to an inclined position, as shown in" Fig. 4. In this movement the point where the lever 46 bears against the lever 43 moves gradually outward from. the pivoted end of the lever 43, so that the resistance to the upward movement of the piston gradually decreases as the movement of the signal to safety proceeds. This diminishing resistance compensates for the diminishing power of the expanding gas in the piston-chamber as it lifts the piston. By this arrangement .it is feasible to make use of a power which shifts the signal from one position to another without substantial loss in the efficiency of that power. For example, it is feasible, as contemplated in the apparatus herein described'and shown, to shut off the gas before the signal completes its movement to safety and rely uponthe expansion of the gas already within the piston-chamber, as heretofore described. This deviceoperates to equalize the otherwise changing ratio between the power to shift the signal and the resistance which thispower must overcome. It may be employed to accomplishits purpose in a case where the power remains constant and the resistance would otherwise increase, or in a case where the"power decreases and the resistance IIO ' tofore described for the home signal.

separate storage-tank for liquefied gas and a' entrance of block 67 are located the home and 1 contacts 77, normally "open contacts 37 and rial magnet 55, (shown' also In ,Fig. 1,) wire 78, signal-magnet 7 9 forhome signal 69, conwould otherwise be constant, or in acase where the power decreases and the resistance would otherwise increase, or in a case where a the power decreases and the resi stance would i otherwise decrease less than. the power. In 1 theapparatus herein shown the power de- I creases, owing to the fact thatthe gas is cut 5 03 'beforethe upward movement of the pis ton is completed, and the resistancewould in creaseexcept for the employment of the device forincreasing leverage. This device may be arranged in a variety of forms.

Inasmuch as the apparatus for the distant signal is a duplicate of that already described for the home signal, it will not benccessary to describe it further than to point out its various parts.

4:8 is a piston-chamber for the distant signal, and 4&9 the piston-rod, carrying a block 50, similar to the block 26.

51 is the supply-pipe for the piston-chanc her and connects with the pipe 10. i

52 is a valve-casing provided with inlet and outlet valves 53 and 54, respectively, which are operated\by the. magnet 55;

56 is a cut-oil valve controlledby the lever 57, which is released by the dog 58, working in the same way as the dog 2 59 isv an arm carried by the dog 58 and simi lar to, the arm 29.

60 is a latchsimilar to the latch 31 and is operated by the arm 61, similar to the arm 33. The arm 61 is controlled by the magnet 55. The signal-rod 62 is connected with the lever 63, operated upon by the lever 64, which is connected by the link to the piston-rod 49. The

levers

63 and 64 operate for the distant signal identically with

levers

43 and 46, here- If desired. each of the signals may have a seplalrate reduci-ng valve associated with each tan e The system shown in Fig. 5 contemplates an arrangemcntot' the home and distant signals in blocks, the signals being equipped with apparatus such as that shown in Figs. 1 to 4, inclusive. In Fig. 5 atrackis .shown divided into

blocks

66, 67, and 68. At'the distant signals 2 and 3, and at theentranceof block 68 are located the home and distant Sig-- nals .69 and 70. The signal-circuit 'for home signal 2 maybe traced from battery 71, commonreturn-wire 72, wire 73, normally open contacts 74, home-'signart magnet 18, (shown also in Figs. 1 and 2,) andnorinally closedcontacts 75 back to battery. The signal-circuit for the distant signal 3 may be traced from battery 76, wire 72,'v vire 73, normally open 36. (shown also in Figs.- 1 and 2,)distantsig tacts 80, and wire 81 backv to battery. The

. danger.

circuit of the block 66 includes the track-mag nets 82 and 83. The circuit of the block 67 includes the track-magnets 84: and 85.] The i circuit of the block 68 includes the track-magi Thereupon the magnet 18 closes the exhausti port 13 and opens the inlet-port.

(See Figs.

1 and 2.) The gas then enters the pistonchamber 5, and the piston 6 rises to move the signal 2 to safety. 'hen the magnet 18 is thus energized, it holds positively the arm'33 in the position shown in Fig. 2. As the pi's ton 6 rises it pushes aside the a'rm29, thereby lifting the dog'2et from engagement with -the lever 22 and thus closes thecut-otf valve 19. The gas already admitted to the pistoncha-mber expands and continues the upward movement of the piston until the dog 30 snaps past the latch, 31. The signal 2 is then at safety. The upward movement of the block 26 lifted the bar {0,'and thereby closed the

contacts

36 and 37. As soon as this takes place the circuit for thedistant signal 3 and home signal 69 is completed, the normally open contacts 77 in this circuithaving been closed when the magnet 83 was shunted to close 'the contacts .74. The distant signal 3 and home. signal 69 thereupon go to safety,

the apparatus operating in the way just de-' scribedwith reference to the home signal.

When the train enters block 167, it shunts mag'nets84, thereby opening at 7 5 the signalcircuit-of home signal 2, and thus dee'nergizes magnet- 18. Magnet 18 thereupon releases. the

valves

14 and 15, so-that the inlet-port is closed and the outlet-port 14 is opened. The magnet 18 also releasesthe lever 33, whereupon the weight of the signal causes the dog 30 to push the latch 31 out of the way, so that the signal returns to danger and the piston 6 descends. This movement of the piston opens

contacts

36 and 37 in the distant-signal circuit and causes the distant signal to go to The presence of the train in block 67 also deengergizes magnet 85, whereupon the home signal 69 is continued at safety and the home signal 95 and distant signal Z0 are put to safety in advance of the train, the operation being the same as that heretofore describedwith respect to signals 2, 3, and.

69. In the same Way when the train enters block- 68 the-

signals

69 and 70 go to danger, and the contacts being now closed a, following train entering block 66. may put the homesignai2 to safety. This following train, however, in block 66cannot put the distant signal 3 or home signal 69 to safety, becausethe .train' in block 68 keeps the contacts at this time open. While the various features of the invention 'areshown in what is believed to :be the best form and arrangement, it is to be understood that many of the advantages of the invention may be obtained by. various changes iii the details of structure and arrangement of such features Without departing from the scope of the invention. For example, various forms of pressure-applying chambersother than a the source of fluid-pressure supply is other piston-chamber may be used. Again, if as;

sired, the fluid within the pressure-applying chamber may be exhausted or allowed to escape therefrom immediately after the signal has been brought to a position where its re-f turn movement is prevented by the retaining device. claimed herein; but it is reserved for another pending application-to wit, application filed March 1, 1904. Serial No. 196,088, fora railway signal apparatus. Furthermore, some features of the invention maybe used inconnection with a fluid-pressure signal wherein than liquefied gas. In such cases the gaspressure applying 'chamberwould still be utilized. 7 I The device for increasing leverage (shown in Fig. 4) and the'system of circuits are not spe-' cifically claimed hereimthe same being reserved for other pending applications to wit, application filed lVIarch 1, 1904, Serial No. 196,088, for .a railway signal apparatus,

and application filed June 7, 1902,"Se rial No. 110,577, for a signal apparatus and systems:

What I claim, and desire to secure by Letters Patent, ise r 1. In afluid-pressure signal apparatus, the combination of a signal; a continuously-maintained fluid-pressuresupply source; a fluidpressure-applying chamberin operative connection with the signal and in communication with said supply source; supply and exhaust valves for said chamber; means for operating said valves whereby fluid-pressure may be j ply source; a fluid-pressure-applying chamber in operative connection with the signal and in supplied to and maintained in said chamber to move the signal from one position to another and there maintain it by said fluid-pressure; and a retaining device toprevent return movement of the signal. v

2. In a fluid-pressure signal apparatus, the combination of a'signal; a fluid-pres'sure-supcommunication with said supply source; supply and exhaust valves for said chamber; me'ans' under electric control for operating s'aid valves. whereby fluid-pressure may be su'p lied to and maintained-in said chamber to move the signal from one .position to another and there maintain it by said fluid-pressure,

and a retaining device under electric control to prevent return movement of the signal.

3. In a fluid-pressure" signal apparatus, the combination of a signal; a fluid-pressure supply source; a fluid-pressure-applying chamber 5 finoperative c0nnection with the signaland in 'iusaid chamber-to move the signal from one position-;to another and there maintain it by said fluidpressure; a retaining device to prevent r.eturn 'mo vement of the signal; and a This modification is not specificallysignal. I

, another and there maintain it.

'commun'icationwith said supply source; supply and exhaust valves for said chamber; means for operating said valves whereby fluidpressuremay be supplied to and maintained track-circuit'for controlling said valve-opercans. and said retaining device.

ati

' In a {fluid-pressure signalapparatu's, the

om'biination'of asignal a fluid-pressure-supply source; a fl uid-pressure-apply ing chamber in operative connectionwith-the signal'aiid in communication with said supply source; supply and exhaust valves for said chamber;

means for operati'ng said valves whereby fluid-pressure may be supplied to and maintained insaid-chamber to move-the signal from one position tonnuther' and there maintain it by said fluidPpressure; a retaining device to prevent'retiirn-inovement of the signal; and a signal-circuit for operating said valve-oper- ,ating means and said-retaining device. 5,. In .a-fluidi-pressure s gnal apparatus, the

combination 'of a signal;a'continuously-maim tained fluid-pressnrH-supply source; a fluidjpressure;applying chamber in operative con- 'nection with the signal and in communication with said supply source; supply and exhaust valves for saidlchamber; means for opening the'supply, alive whereby fluid-pressure may be admitted tov saidchamber to move the sigj -nal from one position to another and there IOO maintainit'by fluidrprssure; a retaining device tojprevent, return. "movement of the signal; and means for releasing said retaining device and 'opening'the exhaust valveto perm'ita return movement of the signal.

. 6. In a fluid-pressure si nal apparatus the "combination of asi gnal; a ontinuously-main- 7. In a fluid-pressure signal apparatus, the

1 combination of a signah'a fluid-pressure-sup? ply. source; a fluid-prs'suM-applying chamber in operative connection with the signal and incommunication with said supplysource;

supply and exhaust valves for said chamber;

means for opening the supply-val-vew dereby fluid-pressure may be admittedto said-chain; bar to move the signal fromlone position to" byfluid-rpressure; a retaining device to prevent return.

movement of the signal; and a trackcircuit for releasing said retaining device and opening the exhaust-valve to permit a return movement of the signal.

8. In a fluid-pressure signal apparatus, the combination of a signal; a continuously-malntained fluid-pressure-supply source; a fluidpressure-applying chamber in operative connection with the signal and in communication with said supply source; supply and exhaust valves for said chamber; means for operating said valves whereby fl ind-pressure may be supplied to and maintained in said chamber to 5 move the signal from one position to 'anotherand there'maintainit 'bysaid fluid-pressure; means for automaticallycutting ofl the fluidpressurc supply to said chamber upon a-pre} determined movement of the signal;-and a retaining device to prevent return movement of thesignal.

9. In a fluid-pressure signal apparatus, the combination of a signal; a fluid-pressure-supply source; afl uidpressure-applying chamber in operative connection with the signal and" in communication with said supply source; supply and exhaust valves for said chamber; means under electric control for operating said valves whereby fluid-pressure may besu pplied 3 to and maintained in said chamberto move the signal from one position to another and-there maintain it by said fluid-pressure; means for automatically cutting off the fluid -pressure' supply to said chamber upon a predetermined '35 movement of the signal; and a retaining device under electric control to prevent return movement of the signal.

10.7 In afluid-prc'ssure signal apparatus, the

combination of a signal; a continuously-main- 4 tained fiuid pressurcsupply source; afluidpressure-apMying chamber in operative connection with the signal and in communication with said supply source; supply and exhaust valves for said chamber; means for opening the supply-valve whereby fluid pressure may be admitted to said chamber to move the signal from one position to another and there maintain it by fli'iid-pressure; a retaining device to-prevent return movement of the sig 5" nal; means for automatically cutting off the lluidq ressure supply to said chamber upon a predetermined movement of the signal; and a means for releasing said retaining device and opening the exhaust-valve to permit a return movement of thesignal.

11. In afluid-pressure signal a 'iparatus, the combination of a signal; a continuously-main taine l fluid-pressure-supply source; a fluidprcssure-applying chamber in operative. connection with the signal and in communication 'with said supply source; supply and exhaust \'al\ '.'s'for said chamber; means Foropening the supply-valve whereby fluid-pressure may be admitted to said chamber to move the sig- 651ml from one position to another and there maintain it by fluid-pressure; a retaining device to prevent return movement of the signal; means for automatically cutting ofi the fluid-pressure supply to said chamber upona predetermined movement of the signal; and

train-operated means for releasing said .rettaimngdevlce audopenlng the exhaust-valve to permit a return movement of the signal.

12. In a fluid-pressure signal apparatus, the

combination of a signal having a'normal bias to danger; a continuously maintained fluid-r pressure-supply source; a fluid-pressure-applying chamber in operative connection with. said'supply source; supplyand exhaust valves for said chamber; means for operating said toand maintained in said chamber tomove the signal to safety against its normal bias and there maintain it by saidfluid-pressure; and a retaining device to prevent return movement ofthe signal. I

-13. Ina flmid-pressure signalrapparatus, the

' valves whereby fluid-pressure may be supplied 7 combination of a signal having a normal bias to danger; a "fluid-pressure-supply source; a fluid-pressure-applying chamber in operativeconnection with-the signal and .in com iiuni cation with said supply source; supply and exhaust valves for said chamber; means for operating said valves whereby fluid-pressure may be supplied to and maintained in said. chamber to move the signal to safety against its normal bias and there maintain it by said fluid-pressure; a retaining device to prevent prevent return movement of the signal;-and

means for releasing said'retaining device and opening the exhaust-valve to permit areturn movement of the signal.

15. In a fluid-pressure signal .apparaitus; the combination of a signal-having a normal-bias to danger; a fluid-pressure-supply source; a' i] uid-pres'su re-applying chamber in operative connection with the signal and-in communication with said supply source; supplyand' exhaust valves for said chamber; means under electric control for operating said Valves whereby fluid-pressure may be supplied to and- "5 maintained in said chamber to move the, signal to safety againstli'ts normal bias and there maintain it by said fluid-pressure; means'for automatically cuttingoff the fluid-pressure supply to said chamber upon a. predetermined movement of the signal; and a retaining device under electric control to prevent return movement of the signal.

16. In afluid-piessure signal apparatus, the combination ofa signal having-a normal bias to danger; a continuously-maintained fluidpressure-supply source; a fluid-pressureapplying chamber in operative connection with the signal and in communication With said supply source; supply and exhaust valves for said chamber; means for openingbthe supplyvalve vwhereby -fluid pressure may be admitted .to said chamber to move the signal to safety against its normal bias and there maintain it by fluid-pressure; a retaining device to prevent return movement of the signal; means for automatically cutting oii the fluid-pressure supply to'said chamber upon a predetermined movement oi the signal; and ttrain-operated means forrreleasing said retaining device and opening the exhaust-valve to permit a return movement of the signal.

17 In a fluid-pressure signal apparatus, the combination of a signal; a fluid-pressure-sup:

ply source; a fluid-pressureapplying chamber.

in operative connection with the signal and in communication with said-su pply source; sup ply. and exhaust valves for-said chamber;

means for opening the supply-valve whereby fluid-pressure may be admitted to said chamher to, move the signal from one position to another andtheremaintain it by fluid-pres' s'ure;j a retaining device to prevent return movement of the signal; and a magnet for releasing said retaining device and opening the exhaust-valve to permit a return movement .of the signal.

18. In a fluid-pressure signaliapparatus, the combination of-a signal; a fluid-pressure-supply source; a fluid-pressure-zipplying chamber in operative connection with the signaland in I vcommunication with said supply source; supply and exhaust valves for said chamber;

means for opening the supply-valve whereby fluid-pressure may be admitted to said chamber to move the signal from one position to anotherand there maintain it by fluid-pressure; a retaining device to prevent return move- 'ment of the signal; a signal-circuit; and'amagnet included in said circuit for releasing said retamin g device and opening the exhaust-val ve to permit a return movement of the signal.

19. In a fluid-'preSsuresignaI apparatus, the combination of a signal; a fluid-pressure-supply source; a fluid-pressure-applying chamber in operative connection with the signal and in communicaizion with said supply source; supply and exhaust valves for saidchambcr;

. means for'opening the supply-valve Whereby fluid-pressure may be admitted to said cham her to move the signal from one position to ariother and there maintain it by'fluid-pressure; a retaining device to prevent return movement of the signal; means for automatically cutting off the fiuid-pressure supply to rsaeev said chamber upon a predetermined movement of the signal; a signal-circuit; and a magnet included in said'circuit for releasing said retaining device and opening the exhaust-valve to permit areturn movement of the signal.

20. In a fluid-pressure signal apparatus, the

combination of a signal; an isolated fiuid pressure stor ge-tank; a fluid-pressure-applying chamber in operative connection with the signal and in communication Withsaid SlJGK". age-tank; supply and exhaust valves for said chamber; means for operating said valves whereby fluid-pressure may be supplied to and maintained insaid chamber'to move the sig nal from one position to another and there maintain it by said fluid-pressure; a retaining device to prevent return movement of the signal; and an automatic reducing-valve for said flu1dpressure-apply1ng chamber.

21. In a. gas-pressure signal apparatus, the' combination of a signal; a tank for liquefied gas; a gas-pressureapplying chamber inoperative connection with said signal and in comn lunicatiou vwith said tank; supplyandexhaust valves for said chamber whereby gas may be supplied to and maintained in said chamber to move the signal from one position to another and there maintain it by gas-pressure; means for operating said valves; and. a retaining device to prevent return movement of thesignal. c v V 22. In a gas-pressure signal apparatus, the combination of-a signal; a tank for liquefied gas; agas-pressure-applying chamber indop erative connection with said signal and in communication with said'tank; supply and exhaust valves "for said chamber whereby gas may be supplied to and maintained in said chamber to move the signalt'rom one position to another and there maintain it by gas-pressure; means foro perating said valves; means for automatically cutting 05 the gas-supply to said chamber-upon a predetermined movement of the signal; and a retaining device to preventreturn movement of the signal. 23. In a gas-pressure signal apparatus, the combination of a signal; a tank for liquefied gas; a gas-pressure-applying chamber in operative connection with said signal and in comi 'municationwith said tank; supply *and'exhaust valves for said chamber whereby gas may be supplied to and rnaintained in said chamber to move the signal from one position to another andthere maintain it by gas-pressure; means for operating said valves; a re-- tant signal.

valves for said chamber whereby gas may be supplied to and maintained in said chamber to move the signal from one position to another and there maintain it by gas-pressure; a retaining dev ce to prevent return move- 'by gas may be supplied to and maintained in said chamber to move the signal from one posi- I tion' to another-and there maintain it by gas-' pressure; means for operating said valves; and a retaining device to prevent return movement of the signal. I

26. -In ag'as-pressure'signal apparatus, the combination'of home and distant signals; gas- -pressure-applying apparatus for operating said signals separately; a source of liquefied gas. for supplying gas to said gas-pressure-ap plying apparatus; and means operated upon a predetermined movement of the home signal for controlling the movement of the distant signal.

27. In a gas-pressure signal apparatus, the

combination-of home and distant signals on the same post; gas-pressure-applying apparatus for operating said signals separately; a detachable and replaceable-tank for liquefied gas located in proximity to said post for supplying gas to said apparatus; and means operated upon a predetermined movement of the home signal for controlling the movement of the dis- 28. In a gas-pressure -signalapparatus,'the

combination of home and distant signals on the same post; 'a sourceof liquefied gas; a separate gas-pressure-applying chamber for each signal and in controllablebommunication with said source of liquefied gas; and means operated up'on a'r'medetermined movement of the home signal and controllingthemovement of the distantsignal.

29, In a gas-pressure signal apparatus, the combination of home and'distant signals; a source of liquefied gas; a separate gas-pressure-applying chamber for each signal and in controllable communication with said source of liquefied gas; supply and exhaust valves for each of said chambers; and means controlling the supply-valve of the distantsignal and 0p erated upon a predetermined movement of/the home signal. I I I i 30. .In a fluidpressure signal apparatus, the

combination 'of home and distant signals; a

source of fluid-pressure s'u pply for the distant signal; a fluid-:Pressure-applyin'g chamber in operative connection with the distant signal an'd'in communication with said supply source;

supply and exhaust valves for said chamber wherebyfluid-pressure may be supplied to said chamber to move the distant signal from one position to anothema retaining device to prevent return movement of said distant signal;

a signal-circuit for controlling the operation of said supply and exhaust valves and said retaining device; and a circuit-controller in said signal-circuit under the control of said home signal whereby the movement of the distant signal to safety is prevented until the home signalhas gone to safety.

31. In a gas-pressure signal apparatus, the combination of home and distant signals; a

tank for liquefied gas for the distant signal; a

gas-pressureap'plying chamber in operative connection with the distant signal and in communication with said tank; supply and exhaust valves -for said chamber wherebygas may be supplied to said'chamber to move the distant signal from one position to another; a retaining device to prevent return move- 'ment of said distant signal; a signal-circuit for controllingthe operation of said supply and exhaust valves and said retaining device;

and a circuit-controller in said signal-circuit under the control of said home signal whereby the movement of the distant signal to safety is prevented until the..home signal has gone to safety.

32. In a fluid-pressure signal apparatus, the combination of home and distant signals; a source of fluidpressure supply to r the distant signal; a fluid-pressrire-irpplying chamber in operative connection with said distant signal;

and in communication with said supply source; supply and exhaust valves for said chamber;

means for operating said valves whereby fluidpressure may be supplied to and maintained in said chamber to move said distant signal 'from one position to another and there maintain it by said fluid-pressure; a retaining device to'prevent return movement of said distant signal; electric means controlling the operation of said valves and said retaining de vice; and. means operated by the movement of the home signal to safety for controlling the operation of said electric means, whereby the movement of the distant signal to safety is prevented until the home signal has gone 1 to safety.

83. In a gas-pressure signal apparatus, the

combination of home and distant signals; a-

tank for liquefied gas for the distant signal; a

gas-pressure-applying chamber in operative.

connection with said distant signal and in communication with said tank; supply and exhaust valves for said chamber; means for operating said valves whereby gas may be'supplied to and maintained in said chamber to move said distant signal from one position to another and there maintain it bysard gas-pressure; a

retaining device to prevent return movement of said distant signal; electric means controlling .the operation of said valves and said resignal. to safety is prevented taining-device; and means operated byjthe movement of the 'home'signal to safety for 'controlling the operation of said electric H gas; agas pressureapplying chamber in operating said valves .and means iior cutting offerative connection with said signal and in communication with said tank, whereby gas may be supplied from said tank to said gas-pressure-applying chamber to move the signal to another position of indication; supply and ex-l haust-valve's' for said chamber; means for opthe supply of gas 'to said chamber before the s gnal has completedits movement under gaspressure, whereby the expansive power of the gas in said chamber may be utilized to complete the movement of the signal.

35. In a gas-pressure signal apparatus, the combination of a signal; a tank for liquefied gas; a gas-pressure-applying chamber in operative connection with said signal and in communication with said tank, whereby gas may.v be supplied from said tank to said gas-pressure-applying chamber to move the signal to another position of indication; supply and exhaust valves for said chamber; means for operating 'saidyvalves, means for cutting ofi.

V the supply of gas to said chamber before the signal has completed its movement under gas- .pressure, whereby the expansive power of the gas in said chamber may be utilized to complete the movement of the signal; and a retaining device to prevent return movement of the signal.

36. In a,gaspressure signal apparatus, the combination of a signal; a tank for liquefied gas; a gas-pressureapplying chamber in 'operative'connection with said signal and in communication with said tank, whereby gas may be supplied from said'tank to said gas-pres sure-applying chamber to inove the signal to another position of indication {supply and ex' 'haust valves for said chamber; means for cut ting off the supply of gas to said chamber before the signal has completed its movement under gas-pressure, whereby the expansive power of the gas in said chamber may be util-- ized to complete the movement of the signal;

a'retainingdevice to prevent return movement of the signal; and a signal-circuit for operat:

ing said supply and exhaust 'valves and said retaining device. I I

37. In a gas-pressure signal apparatus, the combination of a signal having a normal bias to one position of indication; a tank for liquefied gas; a gas-pressure-applying chamber in operative connection with said signal and in controllable communication with said tank, whereby gas may be supplied from said tank to said gas-press,ui'eapplying chamber to move the signal against its normal bias to another until the home valves for said chamber; a cut-off valve normally biased to closed position; and a retaining device to hold said cut-off valve open and adapted to release. the cut-off valve when the' position of indication; supply and exhaust signal has made a predetermined movement under gas-pressure.

38. In a gas-pressure signal apparatus, the

combination of a pivoted semaphore-signal having a normal bias to danger; a tank for liquefied gas; a gas-pressure-applyingchamher in. operative connection with said signal and in communication with said tank; supply and exhaust valves for said chamber, whereby gas may be supplied to said chamberan'd maintained therein to move the ,7 signal to safety and there maintain it by gas-pressure; a cut-off valve for said chamber; means for automaticall-y'closing the cut-off valve'upon a predetermined movement oii'the signal against its normal bias; and electric devices to control theposition" of the supply and exhaust valves.

39 Ina fluid-pressuresignzil apparatus, the 1 combinationv of a signal; means for supplying.- the fluid-pressure to operate the signal; a valve to cut of! the fluid-supply; a pivoted member operating to'open said valve; and lockin means to hold the pivoted member. Y

40. In a fluid-pressure signalapparatus, the combinationof a signal; means for'applying the fluid-pressure to operate the signal; avalve' to out OK the fluid-supply; a pivoted member operating to open said valve; and locking means to hold the pivoted member, said lock ing means being released upon a predetermined movement of the signal.

41. In a fluid-pressure signal combination of a signal; means for applying the fluid-pressure to operate the signal; a valve to cut off the fluid-supply and having a bias toward closed position; a pivoted member op apparatus the crating to open saidvalve; anda lockingmeans to hold the pivoted member; 1

42. In a fluid-pressure signal apparatus the combination of a signal; means for applying the flu id-pressure to o perate' the signal; a valve to cut ofi the fluid-supply and having a bias combination of a signal; means for applying the fluid-pressureto operate the s1gnal;a valve to cutoff the fluid-supply; a pivoted member operating to open said valve and arranged to be actuated to opensaid valve upon a predetermined movement of the signal; and'locking means to hold the pivoted member.

M. In a fluid-pressure signal apparatus, the I combination of asignal; means for applying the fluid-pressure tooperate the signal; a valve to cut off the fluid-supply; a lever operating to open said valve and arranged to be actuated I so b open said valve upon a predeterminedmovement of the signal; and a latch .to hold the lever, said latch being released upon a predetermined movementof the signal;

45. In afluid-pres'sure signal apparatus, the

v combination of a signal; means for applying .the' fluid-pressure to operate the signal; a valve to cut oil the fluid-supply and having abias toward closed position; a lever operating to. open said valve, and arranged to be actuated to open said valve upon a predetermined movement of .the signal; and a latch to hold the lever.

46 In afluid-pressure signal apparatus, the

combination of a signal; means for applying the fluid pressure to operate the signal; a valve to cutoff the fluid-supply and having a biastoward closed position; a pivoted member operating to open said valve, and arranged to be actuated to open said valve upon a predeter mined movement of the signal; and locking means to hold the pivoted member, said looking means being released upon a predetermined movement of the signal.

47. In a fluid-pressure signal apparatus, the combination of a signal; means for applying the fluid-pressure to operate the signal; ,a cutofl" valve; a pivoted member operating to open said valve; locking means to hold the pivoted member; a supply-valve; and a magnet for operating said supply-valve.

48. In afluid-pressure signal combination of a signal; means for applying the fluid-pressure to operate the signal; acutofl*'valve; a lever operating to open said valve; a'latch to hold the levergsu pply and exhaust ports; valve means controlling said ports; and

a magnet for operating said valve means. 49. In a fluid-pressure signal apparatus, the

combination ofa signal; means for applying the fluid-pressure to operate the signal; a cut off-valve; a pivoted member operating to open said valve; locking means to' hold the pivoted member, said locking means beingreleased 7 the fluid-pressureto operate thesignal; a cut off valve; a pivoted member operating to open said valve and arranged to be actuatedto open 6 said valveupon a predetermined movement of 5- upon a predetermined movement of the signal; supply and exhaust valves on the.same

stem; and a magnet for operating said supply and exhaust'valves. 1

50. In a fluidpres su re signal apparatus, the combination of a signal; means for applying the fluid-pressure to operate the signal; "a cutoff valve having a bias toward closed position;

a pivoted member operating to open saidvalve;'locking means to hold the pivoted mem her, said locking means being released upon a predetermined moyement'of the signal; a supply-valve; and a-magn'et foroperating said I supply-valve.

51. In a fluid-pressure signal apparatuathe combination of a signal; means-for applying the signal; locking means to hold the pivoted apparatus, the I lat safety; a supply-valve;- [211M119 magnetto.

'member, said locking means being released leased upon a predetermined movement of the signal; a supply-valve; and a magnet for operating said supply-valve.

- 53. In afiuid-jgressure signal apparatus, the

combination of a signal; means for applying ofl' valve having a bias toward closed position; a lever operating to open said valve, and arranged to be actuated to open. said valve upon a predetermined movement of the signal; and a latch to hold the lever, said latch being I'ethe fluid-pressure to operate the signal; a cutleased upon a predetermined movement of the Y signal; supply and exhaust valves on the same stem; and a magnet for operating said supply and exhaust valves.

5 L. In afluid-piessure signal apparatus, the combination of a signal; means for applying the fluid-pressure to operate the signal; a cutoff valve; alever operating to open said valve;

a latch to hoid the lever; and a retaining device to hold the signal in one position.

" 55. In a fluid-pressure signal apparatus, the. combination of a signal; means for applying thefluidpressure to operate the signal; a su-p-' ply-valve; acut-oif valve havinga bias toward closed position; and means controlled by a movement of the signal to cause said cutoff valve/to open.

. 56/ In a fluid-pressure signal apparatus, the combination of a signal; means for applying. the fluid-pressure to operate the-signal; asup-. ply-valve; a-cut-ofl val ve having a bias toward closed position; and means controlled by a "movement of the signal to cause said cut-oil valve -to open and remain open while the supply-valve is closed. r

57 Ina fluid-pressure s gnal apparatus, the I combination of a signal; meansi'or'applyi-ng the fluid-pressureto operate thesignal; asupply-valve; a cut-off valve havinga bias toward closed position; means controlled by a movement of the signal to cause said cut-off valve to open; and meansto hold '.the cut-ofl valve open, said means beingreleased upon a predetermined movement of the signaL,

58-. In afluid-pressure signal apparatus, the V combination of a signal having a normal bias to danger position; means for applying the fluid-pressure: to move the signal to safety position; a cut-ofl valve; means to open said cutoff valve upon a movementof the signal to danger; a retaining device. to hold the signal tion; a cut-0E valve; means to open said cut-off valve upon a movement of the signal to danger; a retaining device to hold the signal at safety; a supply-valve; and a magnet operating when energized to cause supply-valve to open and to cause said retaining device to "be set, and operating when deenergizedto cause the said retaining device to be released.

60. In afluid-pressuresignal apparatus, the combination of a signal having a normal bias to danger position; means for applying the fluid-pressure to move the signal to safety position; a cut-off valve operating to close automatically; means for opening and holding open said cut-off -valve 'upon'a movement of a the signal to danger, said means being released upon a movementof the signal to. safety; a

retaining device to hold the signal at safety; a supply-valve; and electric means controlling said supply-valve and said retaining device.

61. In a fluid-pressure signal apparatus, the l combination of a signal having a normal bias to danger position; means for applying the fluidpressure to move the signal to safety position; l

a cut-off valve operating to close automatict ally; means for opening and holding open said cut-off valve upon a movement of the signal to danger, said 'means being released upon a movement of the signal to safety; a retaining device to hold the signal at safety; a supplyvalve; and a magnet controlling said supplyvalve and said retaining device, said magnet operating when energized to cause the supplyvalve to open and to cause the retaining device to be set, and operating when deenergized to cause the supply-valve to close and said re- 1 taining device to be released.

6-2. In afluid-pressure signal apparatus, the combination of asigiial having a normal. bias to j combination of a signal; aliquefied-gas source;

movement of the signal to safety; aretaining device to hold the signal at safety; a supplyvalve; and a magnet controlling said supplyoperating when energized to open the supplyvalve and set the retaining device and operating when deenergized to close the supply-valve and release the retaining device.

64. In afiuid-pressure signal apparatus, the

combination of a signal; a fiuid-pressure-supply source; a piston and piston-chamberiii communication with said source and in operative connection with said signal; a cut-off valve operating to close automatically; a pivoted member operating to open said valve; locking ,valve and said retaining device, said magnet means to hold said pivoted member when the ply source;,a piston and piston-chamber in communication, with said source and in operative connection with said signal; a cut-off valve operating to close automatically; a pivoted member operating to open said valve; locking means to hold said pivoted member when the valve is open; means carried by the piston-'rod to move said pivoted member so as to open said valve when the signal goes to danger, and arranged to release said locking means when the signal goes to safety; a supply-valve; a magnet to operate the supplyvalve; and a retaining device to hold the signal at safety.

66- In a gas-pressure signal apparatus, the

e a piston and piston-chamber in communication with said source and in operative connection with said signal; a cutolf valve operdangei' position; means for applying the fluidpressure to move the signal to safety position; acut-ofi valve operating to close automaticlatch to hold the lever and arranged to be released upon,a movement of the signal to safety; a retaining device to hold the signal .63. In a fluid-pressure signal apparatus, the I combination of a signal having a normal bias to pressure to move the signal to safety position; a cut-ofi valve operating to close automaticdanger; locking means to hold the pivoted 'member and'armuged to be released upon a ating to close automatically; a pivoted member operating to open said valve; locking means to hold said pivoted member when the valve is open; means carried by the pistonrod to move said pivoted member so as to ally: a lever for opening said cut-ofl' valve 1 upon a movement of the signal to danger; a I

open said valve when the signal goes to danger; asupply-valve; aretaining device to hold the signal at safety; and electric means opertive connection with said signal; a cut-off valve danger position; means for apply ng the fluid- 3 opei'ating'to close automatically; a lever operating-to open said valve; a latch to hold said I lever when the valve is open; [means carried ally; a pivoted member for opening'said cutoff valve upon a movement of the signal to by the piston-rod to move said lever so as to open said valve when the signal goes to danger; and arranged to release said latch when the signal goes to safety; a supply-valve; a

Ire

retaining device to holdthe signalat safety; and a magnet operating when energized to open the supply-valve and set the retaining combination of a signal; means for applying the fluid-pressure to operate the signal; a slipply-valve; a cut-off valve biased toward closed v position operating to close when the signal goes to safety; and means operating to open said cut-oif valve and actuated by the movement of the signal to danger.

70. In a fluid-pressure signal apparatus, the combination of a signal; means for-applying 2 5 the fluid-pressure to operate the signal; a sup ply-valve; a cut-off valve biased toward closed position; means controlled by a movement of the signal to restrain the closing of the cutoff valveuntil the signal has made a predetermined movement; and a magnet to operate the supply-valve.

71. In a fluid-pressure signal apparatus; the combination of a signal; means for applying the fluid-pressure to operate the signal; a sup- 3 5 ply-valve; a cut off valve biased toward closed position operating to close when thesignal goes to safety; meansoperating to open said cut-ofl" valve and actuated by the movement,

of the signal to danger; and a magnet to op 40 erate the supply-valve. l 72. In a fluid-pressure signal apparatus, the. combination of a signal; means for applying the fluid-pressure to operate the signal; asupply-valve; a cut-ofl valve biased toward closed position; means controlled by a movement of the signal to restrain the closing ofthe cutoff valve until the signal hasmade a predetermined movement; and'a retaining device to hold the signal at one'condition of indication. Y I 73. In a fluid-pressure'signal apparatus, the

combination of a signal;'a supply-valve; a cutoff valve operating to close automatically when the signal goes to safety; means operating to open said cut-,ofl" valve and actuated -'by the movement of the signal to danger; and a rev taini ng device to'holdthe signal at safety.

'74. In a fluid-pressure signal apparatus, the combination of a signal; means for applying 91116 flu1d-pressure-to operate the signal; a sup-Y ply-valve; acut-ofl valve having a bias toward closed position and operating, to close auto:

'.;inaticall, when the signal has made a prede- I movement; means controlled .by a 5 movement of the signal to restrain the closing ferinin to-cause the supply-valve to open and to cause combination of a signal; means for applying of the cu't-ofi valve until, the signal has made such predetermined movement; a retaining device to hold the signal at one condition of indication; and a circuit operating when closed the settingof the retaining device, and operating when denergized to cause the supplyvalve :to' close and to cause therelea-se of the retaining device.

75. In a fluid-pressure signal apparatus, the combination of a signal; means for applying the fluid-pressure to operate the signal; a supply-valve; a c'ut-ofi valve operating to close automatically when the signal'has made a pre determined movement; means operatingto open said cut-off valve and actuated .by the movement of the signal to danger; a retainthe supply-valve to open and to cause the s'et- I ting of the retaining device, and operating when deenergized to cause the supply-valve to closeand to cause the release of the retainiing device. 7 6. In a fluid-pressure signal apparatus, the combination of a signal; means for applying the fluid-pressure to operate thesignal; a sup ply-valve; a cut-off valve biased toward closed position and operating to close when the signal goes to safety and to open' when the signal goes to danger; and means controlling said cut-off valve and operated by movement of the V signal. i Y I,

'7 7 In a fluid-pressure'signal apparatus. the

10 the fluid-pressure to operate the signal; a supply-valve; a cut-off valve biased toward closed position and operating to close when the-'sig-' nal goes to safety and to open when the signal goes to danger; means controlling said cut- 10 5 off valve and operated by movement of the signal; and a retaining device to holdthe signal at safety. a

78. In a fluid-pressure signal apparatus, the combination of a signal; means for applying the fluid-pressure to operate the signal; a supply-valve; a cut-olf'valve operating to close when the signal goes to safety and to open when the signal goes to'dan'ger; means co'ntrolling said cut-ofi' valve and operated by 11 when the signal goes to safety and having a bias' toward closed position; and a pivoted member actuated by the movement of the signal to dark I get and operatingtoopen saidvalve.

80. Inafluid-pressure signalapparatus the combinetion of a signal; means for applying: r30,

the fluid-pressure to operate the signal; a valve for cutting off the supply of fluid-pressure when the signal goes to safety and having a bias toward closed position; a pivoted member actuated by the movement of the signal to danger and operating to open said valve; and traincontrolled means operatingto eflectthe initial supply of fluid-pressur to put the signal to safety.

81. In a fluid-pressure signal apparatus, the combination of a signal; means for applying the fluid-pressure to operate the signal; a valve for cutting 011' the supply of fluid-pressure when the signal goes to safety and having a bias toward closed position; a pivoted member actuated by the movement of the signal to danger and operating to open said valve; and a locking device to hold said pivoted member and released when the signal goes to safety.

82. In a fluid-pressure signal apparatus, the combination of a signal; means for applying the fluid-pressure to operate the signal; a valve for cutting off the supply of fluid-pressure and having a bias toward closed position; and means operated by movement of the signal and controlling said valve, whereby said valve is opened when the signal goes to danger and is closed when'the signal goes to safety.

83. In a fluid-pressure signalapparatus, the combination of a signal; means for applying the fluid-pressure to operate the signal; a valve for cutting off the supply of fluid-pressure andv having a bias toward closed position; and means operated by movement of the signal and controlling said valve, whereby said valve is opened when the signal goes to danger and is closed when the signal goes to safety; and

train-controlled means operatingto effect the;

initial supply of fluid-pressure to put the Signal to safety.

84. In a signal apparatus, the combination' of a signal; storage means containing a supply of liquefied gas; means for applying the gas to operate the: signal; a supply-valve; a cut-01f valve biased toward closed position; and means controlled by a movement of the signal to restrain the closing of the cut-off valve until the signal has made a predetermined movement.

; In a signal apparatus, the combination I of a signal storage means containing a supply of liquefie gas; means for applying the gas to operate the signal; a supply-valve; a cut-offvalve biased toward closed position, and operating to close when the signal goes to safety; and means operating'to open said cut-ofl" valve and actuated by the movement of the signal to danger. I

86. In a'signal apparatus, the combination of a signal; storage means containing'a supply of liquefied gas; means for applying the gas to operate the signal; a supply-valve; acu't-ofi valve biased toward closed position and .op-' erating to close when the signal goes to safety and to open when the signal goes to danger;

rection and to open when the signal has made a predetermined movement in another direction; and means controlling said cut-off valve and operated by movement of the signal; a retaining device to hold the signal in one'position; and means operating to cause the supply-valve to open and the retaining-(device to be set. Y V

88. .In a signal apparatus, the combination of a signal; storage means containing a supply of liquefied gas; means for applying the gas to operate the signal; a valve for cutting off the supply of fluid-pressure when the signal goes to safety and having a bias toward closed position; and a pivoted member actuated bythe movement of the signal to danger and operating to open said valve.

89. In a signal apparatus, the combination of a signal; storage means containing a supply of liquefied gas; means for applying the gasto operate the signal; a valve for cutting off the supply of fluid-pressure when the signal goes to safety and having a bias toward closed position; a pivoted member actuated by the movement of the signal to danger and operating to open said valve; and train-controlled means operating to effect the initial supply of fluid-pressure to put the signal to safety.

90. In a signal'apparatus, the combination of a signal; storage means containing a supply of liquefied gas; means for applying the gas to operate the signal; a valve for cutting off the 91. In'a fluid-pressure mechanism the combination of a motor; an exhaust-port; a valve to cut off thefluid-sugbply; and means operated from the motor for controlling said valve, said means comprising a part connected with the motor and having a movement coincident therewith, and a'second 'part moved by the first-mentioned part and coacting with said.

valve. g V

92. In a fluid-pressure mechanism, the combination of a motor; an exhaust-port; a valve to cut off the fluid-supply; and means operated from the motor for controlling said valv e, said means comprising a part connected with the motor and having a movement coincident therewith, a pivoted lever operated bysaid part and in operative relation to said vaive,

and a second levergf or holdingthe first-mentioned lever inon'e of the positions to which it has been moved.

I 93 In a fluid-pressure mechanism, the com-' bination of a motor, an exhaust-port; a valve to cut 01f the supply of fluid-pressure; a pivoted lever in operative relation to said valve;

' comprising a part connected with the motor and having a movement coincident therewith, and a second part moved by the first-mentioned part and coacting with said valve; and a retaining device operating to hold the signal in one position.

95 In a signal apparatus, the combinationof a motor; an exhaust-port; a valve to .cut ofi the fluid-supply; means operating from the motor for controlling said valve, said means comprising a part connected with the motor:

and having a movement coincident therewith,

a pivoted lever operated bysaid part and in operative relation to said valve, and a second lever for holding the first-mentioned lever in one. of the positions to which it has been moved; and a retaining device operating to hold the signal in one 'position[ therein that the same may conform to the record of the case in the Signed and sealed this 17th day of May, A. D., 1904:.

7 96. In a signal apparatus, the combination of a motor; an exhaust-port; a valve to cut ofi the supply of fluid-pressu re; a pivoted lever in operative'relation to said valve; means in engagement with said lever for operating it; a latching-lever for said pivoted lever; a part connected with the motor for operating said 4 means; and a retainingdevice operating to hold the signal in one position. l

' 97. In a signal apparatus, the combination of a motor; an exhaust-port; a valve to cut 011' the fluid-supply; means operated from the motor'for controlling-said valve, said meanscomprising a part connected with the motor and having a. movement coincident therewith, and a second part moved by thevfirst '?IDBD tioned part and coacting with said valve; a .5

supply-valve; a retaining device'to hold the signal at safety; and electricmeans operating when energized to open the supply-valve and a set the retaining device and operatingwhen -deenergized to close the supply-valve and release the retaining device.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

CLARENCE W; COLEMAN.

Witnesses:

A." K. GALE, WM. M. TOWNLEY.

' It is hereby certified that in Letters Patent No. 758,297, granted A ri1"26',1904, upon the application of Clarence W. Coleman, of Wstfield, New Jersey, for an improvement in Railway Signal Apparatus, anerror appears 'in the printed specification requiring correction, as follows: In line 83, page 10, the word lever should read joivbted tnember; and that the said Letters Patent should be read with this correction Patent Oflice.

E. B. MOORE, Acting Commissioner of Patents.

and having a movement coincident therewith,

CLARENCE W; COLEMAN.

Witnesses:

A." K. GALE, WM. M. TOWNLEY.

E. B. MOORE, Acting Commissioner of Patents.

Correction in Letters Patent No. 758,297.

It is hereby certified that in Letters Patent No. 758,297, granted April 26, 1904, upon the application of Clarence W. Coleman, of Westfield, New Jersey, for an improvement in Railway Signal Apparatus, an error appears in the printed specification requiring correction, as follows: pivoted member; and that the said Letters Patent should be read with this correction therein that the same may conform to the record of the case in the Patent Ofiice.

Signed and sealed this 17th day of May, A. D., 1904.

[man] In line 83, page 10, the word lever should read E. B. MOORE, Acting Commissioner of Patents.