Патент USA US2403886код для вставки
July 9, 1946. R. |_. TWEEDALE 2,403,886 AMMUNITION HOIS'I' Original Filed Oct.‘ 3, 1936 5 Sheets-Sheet 2 R. L Tw E E D A L E ,40386 AMMUNITION HOIST Original Filed Oct. 3, 1936‘ 5 Sheets-Sheet 3 INVENTOR 5y , 14. R. L. TWEEDALE 2,403,88 AMMUNITION HOIST Original Filed Oct. 3, 1936 5 Sheets-Sheet 4 INVENTOR 5y , 146. R. |_. TWEEDALE 2,403,886 ' AMMUNITION HOI‘ST Original Filed Oct. 3, 1936 5 Sheets-Sheet 5 INVENTOR MZW 2,403,886 Patented July 9, 1946 UNITED STATES PATENT OFFICE 2,403,886 AMlVIUNITION HOIST Ralph L. Tweedale, Waterbury, Conn, assignor to The Waterbury Tool Company, Waterbury, Conn., a corporation of Connecticut Application October 3, 1936, Serial No. 103,898 Renewed October 28, 1939 14 Claims. (C1. 89—46) 1 This invention relates to power transmissions and more particularly to a conveyor for deliver :ng articles from one station to another wherein a ?re hazard is present at one station and in which it is desired to prevent the possibility of flame transmission between the two stations at all times, while permitting the continued passage of articles between the stations. The invention is particularly adapted to delivering ammunition aboard ship from an ammunition storage com partment to a position at the guns for use therein, 2 . quired for handling ammunition at the transfer station, which not only increases the number‘ of men required for each gun to be ?red but'pre sents also a retarding element in the delivery of ammunition since'it introduces one more place for unavoidable human errors and delays to inter fere with the intended operation of the hoist. . It is an object of the present invention to pro vide a conveyor particularly adapted for delivery of ammunition directly between a loading station adjacent the magazine and an unloading. station adjacent the gun by which ammunition may, be although it will be understood that the invention delivered through a continuous closed casing may be adapted to other uses wherein similar con whereby transmission of ?are-backs to the'load ditions and problems are encountered. It is customary in war vessels to locate the 15 ing station may be prevented without requiring ammunition magazines or storage chambers in the lower part of the ship where the possibility of their contents being exploded by enemy pro an intermediate transfer station. 7 D , _ It is also an object to provide a conveyor, for delivering articles between two stations which are separated by a ?ame-proof wall having an open jectileS is most remote. The guns which use the ammunition being situated on the upper decks 20 ing at one station adjacent the conveyor, and in‘ which is incorporated‘ means for passing articles 7 of the ship. either in turrets or on deck mount through the opening while maintaining a ?ame ings, it is necessary to provide means for con proof seal at all times. veying ammunition from the magazine to a posi A_ further object is to provide a loading station tion near the guns where it may be readily placed 25 fora conveyor having an article passing meche in the guns as needed. _ anism which is actuated by a separate motor ~ Various types of conveyors have been hereto means independent of the conveyor drive mecha fore provided for this purpose and where high rates of delivery to rapid ?ring guns are required, It is also an object to provide a loading station the so-called dredger type ammunition hoists have marked advantages over other types in use. 30 for a conveyor in which a reciprocatingarticle passing member "is mounted adjacent a wall open Such a hoist usually comprises an endless chain ing and is provided with at least one article re conveyor which is encased in a continuous tubular ceiving recess adapted to be alternately brought hoist trunk or casing extending through the ship into register with the opening for receiving an from the loading station in or adjacent the magazine to the unloading station adjacent the 35 article and moved to a position where the article may be transferred to the conveyor. '/ _ gun. This continuous hoist trunk provides a nism. . . Further objects and advantages of the present invention will be apparent from the following description, reference being had to the accom explosions occur at the gun or whenever an enemy projectile explodes in or near the hoist trunk. 40 panying drawings wherein a preferred form ‘of the present invention is clearly shown. . In order to break this continuous path for In the drawings: ?ame travel to the magazine, it has been found Fig. 1 is a diagrammatic cross section ‘ of a , necessary heretofore to deliver the ammunition ship incorporating a preferred form of the pres in two stages by two entirely independent ammu conduit which introduces the possibility of ?ame transmission to the magazine whenever accidental nition hoists with a transfer station where the 45 ent' invention. ~ Fig. 2 is a front view of a loading station in ammunition is carried manually from the de~ corporating the present invention. _ . livery end of the lower hoist to the loading end Fig. 3 is a fragmentary cross section onlline of the upper hoist. This construction, while sat 3—3 of Fig. 4. . isfactory from the standpoint of safety of the Fig, 4 is a cross section on line 4-4 of .Fig. 3. installation and effectiveness to prevent the trans 60 Fig. 5 is a diagrammatic view showing the mission of ?are-backs to the magazine, adds con hydraulic circuits incorporated in the conveyor siderably to the weight and cost of the installa drive and control mechanism. , . tion since each of the two sections of the hoist Referring now to Fig. 1 there is indicated dia must be provided with its own independent drive mechanism. Furthermore additional crew is re 65 grammatically a portion of a longitudinal section 2,403,886 3 4 of a war vessel having superimposed decks In of usual construction, the spaces between which are divided by partitions I2 into suitable compart ments. Indicated at M is a deck gun and at [6 a revolving turret having two or more guns I8 mounted thereon in the usual fashion. Ad jacent the gun I4 is mounted the delivery head 29 of a dredger type ammunition hoist 2| hav ing a trunk 22 extending downwardly through the vessel to a compartment 24 which may be either a magazine compartment for the storage of ammunition or a handling room adjacent such a compartment and in whichis located the load ing end 25 of the hoist 2! together with suitable driving mechanism for the hoist. In the turret I6 is mounted a delivery head 26 of a second ‘H slidably ?tted in a chamber 13 which commu nicates with the upper end of the bore 55 through a passage 15 formed in the spool of valve 51. The piston 69 has a portion ‘I6’ of larger diam eter than the portion ‘H and slidably ?tted in a chamber 18' to which the conduit 56 leads. The bottom wall of the piston 69 is provided with an opening forming a clear passage around the stem of valve 45 and having a seat on which the enlarged portion 61 of the stem is adapted to rest for the ‘purpose of closing this passage. The space inside the piston 16' communicates with the tank through va passage 80’ formed in the stem of the valve 45. At its lower end the valve stem has a roller 82' acting as a follower for a cam 85. The latter is connected by a suitable drive means not shown to the shaft of the sprock ets 49 50 that the cam 85 makes one revolution while the chain 38 travels through one night dis tance. The cam 85 has a depression in which the roller 82’ is shown at rest. vIn this position dredger type ammunition hoist 21 having a trunk 28 extending vertically downward to a compart ment 30 similar to the compartment 24, in which is located the loading end 32 and the necessary driving mechanism for the hoist 27. The hoist trunk 28 is shown secured to the top deck If! at the valve 45 is completely closed while the valve the center of rotation of the turret I 6 and is 51 connects the conduit 63 to the pressure line stationary relative to the turret although it will 59 and the conduit 65 to the tank line 60'. To be understood that the ammunition hoist 2'! may 25 either side of this depression are elevated por be mounted to revolve with the turret i6 if de tions 81 which hold the valves in such a position _ that the valve 45 is opened to a. considerable de Referring now to Figs. 2 through 5 wherein the gree while the valve 51 still connects conduit 63 construction of the loading ends 25 and 32 is with the conduit 59 and conduit 65 with conduit illustrated in detail, there is shown a casing 34 30 60'. The remainder of the periphery of the cam forming the lower end of the hoist trunk to which 85 is raised still further so as to completely open the casing 34 may be tightly sealed at the ?ange the valve 45 and to reverse the connections at 36. The casing 34 serves not only to enclose the the valve 51. When the valves are raised to this drive sprockets 49 and the hoist chain or con upper extreme position the valve stem has been sired. veyor band 38, having conveyor lugs 39, but also as a mounting for the hoist driving and control mechanism. The latter may be of any suitable lifted higher than it is possible to lift the piston 69, so that the enlarged portion 61 lifts away from the seat in the bottom wall of the piston 69. The construction. The form of drive mechanism and cam 85 and its drive mechanism are enclosed in a suitable oil-tight housing not shown, the ‘in tor 42 adapted to drive the sprockets 40 through terior of which is connected to tank. a worm drive 44. A variable displacement pump The entire arrangement of the control unit 46 (see Fig. 5) and auxiliary pump 48 are driven 52 is such that whenever a shot of oil is admitted by an electric motor 50 to supply ?uid to the through the conduit 56 to the chamber 18', the piston 69 is lifted due to the enlarged portion motor 42 through .a control unit 52. The control unit 52 is constructed to control the displacement 6'! being on its seat in the bottom wall of the piston 69. The piston‘69 and both valves 45 and of the pump 46 and to control communication 51 are accordingly lifted to a position just short between the pump 46 and the motor 42 through of the highest position to which the cam would conduits 54 in a manner to provide for auto matically moving the hoist chain 38 through one lift them. ‘Thus the valve 45 is opened and the ?ight whenever a starting “shot” of fluid from 50 valve 51 is reversed to cause the stroke of the pump 46 to be increased at a rate determined'by the auxiliary pump 48 is admitted to the device 52 through a control conduit 56. the volumetric capacity of the auxiliary pump 48. For this purpose the control unit 52 comprises Oil is delivered to and returned from the ?uid a body 4| having a cylindrical bore 43 in which motor 42 through the conduits 54, [Land 53, thus is mounted a spool valve 45 for the purpose of 55 causing the motor 42 to operate, turning the cam blocking or opening the passage of oil between 85. The latter will contact the roller 82' after about one-quarter of a revolution when the high the conduits 54 and conduits 41. A second cy est part of the cam strikes the roller 82', thus lindrical chamber 49 carries a spool valve 5! for the purpose of reversing the ?ow between the lifting the valves 45 and 5‘! a further amount. This additional lift raises the enlarged portion 61 conduits 41 and a pair of conduits 53 which lead to the ?uid motor 42. The body 4| also has at off from the seat in the bottom wall of the piston control therefor illustrated comprises a fluid mo its upper end a bore 55 in which is mounted a 69, thus permitting the oil trapped in the cham spool valve 51 for controlling the stroke regu lating ?uid motor of the pump 46. A conduit 59 extends from the auxiliary pump 48 to the upper ber 18' to escape through the opening in the bot tom wall of the piston 69 and through the pas end of the bore 55 while a conduit 60' enters the bore 55 at its mid-portion. The valve 51 is adapt ed to selectively control and reverse the connec sage 8| to tank. As soon as the cam has com pleted an approximate one-half revolution in ad dition, the roller 82' drops ‘down to the cam'por tion 81, thus reversing connections at valve 51 but not completely closing the valve 45. The tions of the conduits 59 and 60' with a pair of conduits '63 and 65 leading to opposite ends of the 70 stroke of the pump '46 is thus reduced at.a rate determined by the capacity of pump 48 causing stroke regulating mechanism at the pump 46. The valves 45 and 5‘! are formed integrally upon the motor 42 to decelerate. When the cam 85 a common stern having an enlarged portion 61 has completed a revolution, the roller 82' returns to the position shown in the drawings, complete around which is slidably mounted a lift piston 69. The latter has a cylindrical upper portion 4. 5 ly closing the valve 45. At this time the enlarged 2,403,886 6 5 are a pair of directional control valves I00 and portion 61 again comes to rest on its seat in the bottom wall of piston 69, thus placing the appa I02. The movable elements of valves I00 and I02 are mounted on a common stem I04 which is ratus in condition for restarting whenever an connected by a fork and collar connectionto a other shot of oil is introduced to the conduit 56. snap action lever I06. The latter is pivotedco It will be noted that should a shot of oil be intro axially'with the lever 92 and connected to be duced to the conduit 58 before the cam 85 has operated thereby through a spring I08 to pro made one revolution, the lift piston 69 will not vide snap movement of the lever I06 as the lever rise because a free path is opened from the cham 92 reaches either end of its oscillation. ber ‘I8’ to tank through the passage in which the Mounted on the casing 34 behind a back wall enlarged portion 61 seats. It will also be noted 10 IIO of the chamber 66 are a pair of carrier trip that oil pressure from the auxiliary pump is con valves H2 and H4. Each of these valvesiscon stantly exerted over the upper end of‘ the valve nected for operation by a trip lever H6 and H8, respectively, each of which has a portion pro jecting into the chamber 66 and into the re 5'! creating a bias for the entire stem assembly in the downward direction. Likewise this pres sure is exerted over the annular area at the top cesses ‘I0 and 12 when opposite one ‘of the open‘ ings 60 and BI. The trip levers H6 and H8 are adapted to be moved counterclockwise in Fig. 3 whenever a piece of ammunition is properly placed in a recess ‘I0 or 12. Pivotally mounted in the casing 34 adjacent the lower edgeof the open an outward extension 58 having a pair of open ing ‘I8 at I20 is a lower trip lever I22 adapted to ings 60 and BI of proper size and shape to per be depressed by a piece of ammunition'such as mit a piece of ammunition to pass therethrough. I24 when it is placed in position on the‘ hoist The extension 58 is hinged to the casing 34 at 62 along one edge thereof and is adapted to be 25 chain 38. The lower trip'I22 is connected by an arm I26 (see Fig. 5) ton, lower trip valve I28 clamped in sealing engagement therewith by suit mounted'in a valve block I30. 'An upper trip able securing means 64. The extension 58 is valve I32 is also mounted’in the block I30 and is formed with a chamber 66 in which is mounted adapted to be actuated by solenoid I34 which in a reciprocating carrier member 68 which forms turn is controlled by an upper trip I36 located a pair of adjacent recesses 10 and ‘I2. For this at the delivery end of the hoist; ' ~ » purpose the carrier 68 is formed with a bottom The valve I28 is adapted to connect a conduit wall ‘I4 and a, similar top wall, not shown, and I38 with a conduit I40 when the trip I22 is de with three vertical walls ‘I6 forming the sides of the portion ‘II of the lift piston 69 biasing the latter downwardly whenever pressure is relieved in the chamber ‘I8’ by the opening of the pas~ sage through the bottom wall of the piston 19. The casing 34 is provided on its front face with 20 pressed and to connect with a conduit I42 when. of the chambers ‘I0 and 12. The width of the chambers ‘I0 and ‘I2 and the spacing of the open lugs 60 and 6| are such that the carrier 68 may the trip I22 is raised. The valve I32 is adapted to open communication between the conduit I40 be reciprocated between the position shown in and the conduit 56 whenever the solenoid I34 is energized and to close communication when the Fig. 4 in which the recess ‘I0 is opposite the open solenoid is deenergized. The solenoid I34 is‘un ing 60 and a position to the left thereof in which the recess ‘I2 is opposite and in register with the 40 der the control of the upper trip I36 through a three-way switch I44 which is connected in cir opening 6 I. cult with a, three-way switch I46 adapted to be Intermediate the openings 60 and 6| in the actuated by a reversing lever I48. When the re back wall of the chamber 66 is formed an open versing lever I48 is set to hoist ammunition, as ing 18 opposite the hoist chain 38 and with which either of the recesses ‘I0 and 12 may reg ister when the other is in register with an open 45 illustrated in Fig. 5, the switch I46 connects the solenoid to the switch I44 so that the solenoid will be energized from the source I 45‘v whenever ing 60 or 6|. A pair of ?apper doors 1‘! are piv the trip I36 ‘is released by removal‘ of ammunition oted in the casing 34 at the sides of the opening from the delivery end of the hoist.‘ With 'the ‘I8 and are spring biased to closed position and adapted to be opened at certain times by trip 50 reverse lever I48 set for lowering ammunition, the switch I46 connects the‘switch I44 for op’ levers ‘I9 lying in the path of lugs 39. Bevel gear posite action. ' ' ' ing 8| connects the trip levers ‘I9 to the pivot The lever I48 also controls a reversing valve shafts of the ?apper doors ‘IT. A lost motion I50 for selectively connecting conduit I38 or the drive connection at 83 permits the trip levers 19 to be moved downwardly without actuating the 55 conduit I42 with a conduit I52 leading from the auxiliary pump 48, as well as controlling valve doors ‘I1 during lowering operation of the hoist. 5I for reversing the operation of the motor 422 In front of the carrier 68 there is reciprocably The valve I50 also connects the conduits I38 and mounted a sliding door 80 of proper width to I42 with drain conduits I5I and I53 when "not close one of the openings 60 or 6| while leaving the other open. The carrier 68 and the door 80 60 connected to conduit I52. The carrier trip valves each carry rigidly secured thereto downwardly H2 and II 4 are connected‘ by conduits I56 to -a lower trip relay valve I58 which is adapted to extending pins 82 and 84 respectively which pro close communication between the conduits I 56 ject through slots 86 and 88 formed in the bottom and a branch I60 of conduit I52 whenever lower wall 90 of the extension 58. A lever 92 is pivoted to the wall 90 on the lower side thereof embrac 65 trip'valve I28 admits ?uid to the conduit I48, For this purpose a ‘conduit I82 extends from the ing at its outer ends the pins 82 and 84 whereby conduit I40 to the left-hand end of the relay the carrier 68 and the door 80 are caused to valve I58 for admitting pressure ?uid to the move simultaneously in opposite directions. The end surface of a large piston I64. ‘The large pin 82 extends below the lever 92 to enter a bore formed in an operating piston 94 which is re— 70 piston I84 is connected by a stem I66 to a small piston I68, the space to the right of which is ciprocably mounted in a pair of cylinders 96. The connected to the expansion tank I70 through 'a cylinders 96 are formed integrally with a cover conduit I12. ‘ plate 98 which is removably secured to the bot The large piston I 64 when in the position illus- I tom wall 90 to cover the mechanism attached thereto. Also formed integrally in the cover 98 trated blocks communication . between conduits 2,403,886 .7 8 doors 11 and the ammunition .in the recess 10 accordingly drops on to the chain 38 .and lower left due to the release of pressure ?uid in the trip 22 is ready for the next cycle of operation. conduit I49, communication is established be At the end of the movement of piston 94 the snap tween the auxiliary pump 48 and the carrier trip valves H2 and II4 through conduits I52, I59, Or acting lever IE6 is operated to shift the valves Hi9 and I02 connecting the left-hand cylinder and I56. Each of the valves H2 and H4 com 96 to valve H4 and connecting the right-hand prise a piston valve I14 adapted to open com cylinder 96 to the drain conduit I82. The hold munication between the conduit I56 and a con ing valve I18 is thereby permitted to ‘move .to duit I16 leading to the corresponding directional control valve I99 or I02, whenever the trip lever 10 the left again closing the by-pass I89 until such time as pressure ?uid is again admitted to the H6 or H8 is depressed by a piece of ammunition conduit I16. lying in one of the recesses 19 or 12. .A pres While the form of embodiment of the ‘inven sure operated holding valve I18 is also mounted tion as herein disclosed (constitutes a preferred in each valve block H2 and H4 and is moved to form, it is to be understood that other forms the right in Fig. 5 Whenever ?uid pressure is might be adopted, all .coming ‘within the scope admitted through the valve I14 to the conduit of the claims which follow. I16. This movement opens communication be I60 and I56. When the piston I64 moves to the What is claimed is as follows: 1. In a conveyor for delivering ammunition .be so that when ?uid pressure is once admitted to 20 tween a loading station adjacent a storage .com partment and a station for ‘use and .having an the conduit I16 by the opening of valve I14, the endless ?exible ammunition conveyor band, a pressure is maintained therein through the .valve ?ame-proof casing surrounding the conveyor I18 so long as there is any existing back pres~ band and means for driving the conveyor .band, sure at the remote end of the conduit I16. The valves I09 and I62 are adapted to selectively 25 the combination with the conveyor of means for passing ammunition into said casing at the load connect a cylinder 96 either with a conduit I16, ing station and separate motor means for driv as shown in Fig. 5, or to connect both a cyl ing the ammunition passing ‘means, whereby .the inder 96 and a conduit I16 with the expansion ammunition passing means may ‘be operated tank I10 through a branch I92 of the conduit I12. while the conveyor is stationary. In operation with the motor 59 and pumps 48 2. In a conveyor for delivering.ammunitionbe and 48 running and with the hoist at rest due tween a loading station adjacent a storage com to the presence of a piece of ammunition at the partment and a station for use and .having ‘an delivery station, the trip I36 keeps the solenoid endless ?exible ammunition conveyor band, a I34 deenergized so that ?uid from the pump 48 is blocked off from the conduit 56 at the valve 35 ?ame-proof casing surrounding the conveyor band and means for driving the conveyor band, I32. Assuming a piece of ammunition to have the combination with the conveyor of means for been dropped from the recess 12 by the ?apper tween the conduit I16 and conduit I56 through a parallel path including a restrictive conduit I39 passing ammunition into said casing at the load doors 11 and to lie on the chain 38 and the lower ing station, separate motor means for driving the trip I22, as illustrated in Fig. 5, as soon as the ammunition is removed from the delivery station 40 ammunition passing means, and means respon sive to the positioning of a piece of ammunition trip I36 is released to energize solenoid I34, open on the conveyor for controlling operation of said ing valve I32 to admit pressure ?uid to the con motor. duit 56. The control unit 52 in response to the 3. In a conveyor for delivering ammunition -be— admission of pressure ?uid to the conduit 56 tween a loading station adjacent a storage com causes the ?uid motor 42 to drive the sprockets partment and a station for use and having an 40 and chain 38 through one ?ight; that is, endless ?exible ammunition conveyor band, a through the distance to bring the next lug 39 ?ame-proof casing surrounding the ‘conveyor into rest position, as illustrated in Fig. 5. band and means for driving the ‘conveyor band, Assuming a piece of ammunition to have been placed in the recess 10 through the opening 611 50 the combination with the conveyor of .means ,for before the start of the hoist cycle, the trip H6 will be depressed so that valve I14 will be open. passing ammunition into‘said casing at the load ing station, separate motor means for driving'the ammunition passing means, and means respon With the piston 94 and the valve IUD lying in the sive to positioning of a piece ‘of ammunitionin position illustrated in Fig. 5, the piston 94 will not be actuated at the beginning of the cycle 55 the ammunition passing means for controlling op eration of said motor. until the lug 39 has picked the ammunition off 4. In a conveyor for delivering ‘ammunition‘be from the lower trip I22 and permitted the latter tween a loading station adjacent a‘storage com to raise, thus transferring the conduit I49 from partment and a station for use “and having ‘an the pressure line I39 to the drain line I42. As soon as this occurs the lower trip relay valve I58 60 endless ?exible ammunition conveyor band, a ?ame-proof casing surrounding the conveyor moves to the left admitting pressure ?uid from the conduit ISO to the conduit I 56. The piston 94 is thereby caused to move to the left in Fig. 5 moving the carrier 66 to the left and through the lever 92 moving the door 80 to the right in Fig. 4. This action once started is continued regardless of the release of trip IIE as the am band and means for driving the conveyor band, the combination with the conveyor of means-for passing ammunition into said casing at the load ing station including'a linearly reciprocable ‘car rier having an ammunition'receivingrecess, and. means cooperating with the ammunition passing means for maintaining ‘a ‘?ame-proof seal be munition moves to the left away from the same because the holding valve I13 opens a connec tween the inside and outside of the casing at all tion around the valve I14 through the passage 70 times whereby the transmission of ?are-backs I80. When the piston 94 completes. its move from the use station to the loading v‘station is prevented. ment to the left, the recess 10 is opposite the ?apper doors 11 and the recess 12 is opposite the 5. In a conveyor for delivering ammunition :be tween a loading station adjacent a storage com opening 6|. Near the end of the ?ight the next lug 39 actuates the trip levers 19 to open the 75 partment and a station for use and having ;an 2,403,886 endless ?exible ammunition conveyor band, a ?ame-proof casing surrounding the conveyor band and means for driving the conveyor band, the combination with the conveyor of means for passing ammunition into said casing at the load ing station including a linearly reciprocable car rier having an ammunition receiving recess, means cooperating with the ammunition passing 10 ible conveyor band, means for driving said con veyor band, means forming a ?ame-proof wall between said conveyor band and one of said stag tions, said wall having an opening adjacent the conveyor band through which articles may pass, means associated with said opening for passing articles therethrough and cooperating with said opening for maintaining said opening sealed against the passage of ?ame, separate motor means for maintaining a ?ame-proof seal be tween the inside and outside of the casing at all 10 means for driving the article passing means, and means responsive to the positioning of an article times whereby the transmission of ?are-backs in the article passing means for controlling op from the use station of the loading station is pre eration of said motor. ~ vented, and separate motor means for driving the 11._In a conveyor for delivering articles be ammunition passing means. 6. In a conveyor for delivering ammunition be 15 tween two stations the combinationof an endless ?exible conveyor band, means for driving said tween a loading station adjacent a storage com conveyor band, means forming a ?ame-proof wall ' partment and a station for use and having an between said conveyor band and. one of said sta endless ?exible ammunition conveyor band, a tions, said wall having an opening adjacent the ?ame-proof casing surrounding the conveyor band and means for driving the conveyor band, 20 conveyor band through which articles may pass, means including a linearly reciprocable carrier the combination with the conveyor of means for having an article receiving recess associated with passing ammunition into said casing at the load said opening for passing articles therethrough ing station, and means including an alternately and cooperating with said opening for maintain reversing ?uid motor for driving the ammunition 25 ing said opening sealed against the passage of passing means. ?ame, and means for driving the article passing 7. In a conveyor for delivering ammunition be tween a loading station adjacent a storage com partment and a station for use and having an endless ?exible ammunition conveyor band, a means. ' 12 In a conveyor for delivering articles be tween two stations the combination of an endless ?ame-proof casing surrounding the conveyor 30 ?exible conveyor band, means for driving said conveyor band, means forming a ?ame-proof wall band and means for driving the conveyor band, between said conveyor band and one of said sta the combination with the conveyor of means for passing ammunition into said casing at the load ing station including a reciprocable carrier hav ing an ammunition receiving recess, means co tions, said wall having an opening adjacent the conveyor band through which articles‘ may pass, 35 means associated with said opening for passing articles therethrough and cooperating with said opening for maintaining said opening sealed operating with the ammunition passing means for maintaining a ?ame-proof seal between the against the passage of ?ame, and means includ inside and outside of the casing ‘at all times ing an alternately reversing ?uid motor for driv whereby the transmission of ?are-backs from the the article passing means. " use station to the loading station is prevented, 40 ing13. In a conveyor for delivering articles be and means including a reciprocating piston motor tween two stations the combination of an endless ?exible conveyor band, means for driving said 8. In a conveyor for delivering articles between conveyor band, means forming a ?ame-proof two stations the combination of an endless ?ex ible conveyor band, means for driving said con 45 wall between said conveyor band and one of said stations, said wall having an opening adjacent veyor band, means forming a ?ame-proof wall be the conveyor band through which articles may tween said conveyor band and one of said sta for reciprocating said carrier. pass, means including a reciprocable carrier hav tions, said wall having an opening adjacent the ing an article receiving recess associated with conveyor band through which articles may pass, said opening for passing articles therethrough and 50 means associated with said opening for passing cooperating with said opening for maintaining articles therethrough and cooperating with said said opening sealed against the passage of ?ame, opening for maintaining said opening sealed means for driving the article passing means, and against the passage of ?ame, and separate mo means including a reciprocating piston motor tor means for driving the article passing means. 9. In a conveyor for delivering articles between 55 for reciprocating said carrier. 14. In a conveyor for delivering articles be two stations the combination of an endless ?ex tween two stations the combination of an endless ible conveyor band, means for driving said con ?exible conveyor band, means for driving said veyor band, means forming a ?ame-proof wall conveyor band, means forming a ?ame-proof wall between said conveyor band and one of said sta tions, said wall having an opening adjacent the 60 between said conveyor band and one of said sta tions, said wall having an opening adjacent the, conveyor band through which articles may pass, conveyor band through which articles may pass, means associated with said opening for passing means including a linearly reciprocable carrier articles therethrough and cooperating with said having an article receiving recess associated with opening for maintaining said opening sealed said opening for passing articles therethrough 65 against the passage of ?ame, separate motor transversely to the reciprocation of the carrier means for driving the article passing means, and and cooperating with said opening for maintain means responsive to the positioning of an ar ing said opening sealed against the passage of ticle on the conveyor for controlling operation of ?ame, and means for driving the article passing said motor. means. 10. In a conveyor for delivering articles between RALPH L. TWEEDALE. V two stations the combination of an endless ?ex 16 Certi?cate of Correction Patent No; 2,403,886. July 9, 1946. RALPH L. TWEEDALE It is hereby certi?ed that errors appear in the printed speci?cation of the above numbered patent requiring correction as follows: Column 5, line 19, for “piston 79” read piston 69; column 9, line 54, claim 8, after “passing means” and before the period insert the comma and Words , whereby the ammunition passing means may be operated while the conveyor is stationary; and that the said Letters Patent should be read with these corrections therein that the same may conform to the record of the case in the Patent O?‘ice. Signed and sealed this 29th day of October, A. D. 1946. ' [m] LESLIE FRAZER, First Assistant Commissioner of Patents.