US1179804A - Conveying apparatus. - Google Patents

Description

J. T. COWLEY,

CONVEYING APPARATUS.

APPLICATION FILED APR. 16. 1909.

- Patented Apr. 18, 1916.

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CONVEYING APPARATUS.

APPLICATION man APR. I6, 1909.

1,179,804. Patented Apr. 18, 1916.

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J. T. COWLEY.

CONVEYING APPARATUS.

APPLICATION FILED APR.16,!909.

Patented Apr, 18, 1916.

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J. T. COWLEY.

CONVEYING APPARATUS. APPLICATION FILED APR. 16. 1909.

1,179,80%. Patented Apr. 18, 1916.

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uh I?" new 0% V dttouwny 'rm: COLUMBIA PLANOGRAPH :0. WASHINGTON, n. c.

J. T. COWLEY.

CONVEYING APPARATUS.

APPLICATION FILED APR. 16, 1909.

6 SHEETS-SHEET 6.

Patented Apr. 18, 1916.

wi kmeooeo wf ceiving station by a carrier.

front elevation of a portlon of a sending stadetail views of a carrier.

JAMES '1. COWLEY, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE LAMSON COMPANY,

OF NEWARK, NEW JERSEY, A CORPORATION OF NEW EBSEY.

CONVEYING APPARATUS.

Specification of Letters Patent.

Patented Apr. 18, 1916.

Application filed April 16, 1909. Serial No. $90,360.

paratus, of which the following is a specification.

My invention relates to improvements 1n conveylng apparatus and particularly to that class wherein a continuously traveling cable is utilized to actuate one or more carriers, to convey and deliver loads between two or more stations.

The object of my invention is to simplify the construction and to render more etficient sitions assumed bythe carriers during their travel thereon. Fig. 2 is an enlarged or detail side elevation of the upper part of the system shown in Fig. 1, and illustrates the method of automatically operating a re- Fig. 3 is a tion. Fig. a is a side elevation of sending station mechanism, parts being shown in section. Fig. .5 is a plan view of Fig. 4. Fig. 6 is an enlarged side view of the automatic selector mechanism at the sending station to determine the destination of a loaded carrier. Fig.7 is a plan view of Fig. 6. Fig. 8 is afront elevation of a receiving station. Fig. 9 is a side elevation of the same.

Fig. 10 is a somewhat diagrammatic detail plan view of said station. Figs. 11, 12, 13 and 14 are res ilcctively front, side, plan and Fig. 15 is an enlargeddetail view of one of the indicators.

Figs. 16, 17 and 18 are enlarged detail views of part of the unloading mechanism; and

Fig. 19 is a detail of the lever catch or latch hereinafter referred to.

Referring to Figs. 1 and 2, the track A consists of two rods 1 upon which the carriers travel and are guided' B represents an endless cable looped at the ends of the track around the drums C. The cable is driven by one of the drums C, to which power is imparted by thebelt D leading around the turns in the track the cable is carried by the grooved pulleys E. At intervals along the cable carriers 9 are attached for the transportation of articles.

Referring to Figs. 11-14, the carrier 9 has an upward extension 109 at its back, and from the rear of this back projects the wrist-pin 209 journaled in the truck 2 adapted to travel on the rods 1. From the rear of the truck projects the arm 210 (Fig. 12) connected with the cable B. The body of the truck is generally rectangular, and at each corner is a pair of grooved rolls 3, 4: to engage one of the rods 1. These rolls engaging the rods hold the truck to the track or Way as it is propelled along the same by the cable. The wrist-pin 209 is held in place in its bearing in the truck by the cap-plate 6 secured to the end of the wrist-pin and proectlng over the adjacent edge of the truck. The cap-plate is held in place on the wristpm by the bolt 7 and the nut 8. Interposed between the wrist-pin and its bearing in the truck are the bearing balls 5. By means of this pivotal connection between the carrier and the truck the carrier can retain a pendent position irrespective of the position taken by the truck in following the direction of the tracks.

Means are provided to Prevent the carrier from swaying during the progress of the truck. Pivot-ed at v13 to the truck 2 is the lever 13 (Fig. 14:) normally pressed outward at its upper end by the spring 12. Pivoted to the lower end of the lever, as at 101, 1s the pin 10 having play in a bearing in the base of the truck. In the inner face of extension 109 of the carrier are the three detents 11 11 (shown by dotted lines in Fig. 11) arranged in a circle concentric with the pivotal point of the wrist-pin 209. Two of the detents are on the horizontal diameter of the circle, and the other 11 is midway between them on the lower arc of the circle. lVith these detents 11 11 the inner end of the pin 10 is adapted to engage as the carrier turns on the truck. Detent 11 is made of a slightly different shape from the detents 11, for convenience of construction and to avoid further cutting into the adjacent circular rib shown in dotted line immediately above detent 11. On the upper end of the lever 13 is the roll 15- to engage the cam-rail 14 located in each turn of the track. (Fig. 2.) When the truck and carrier are traveling on an upright section of the track the pin is pressed into engagement with the lower detent 11 through the action of the spring 12 on the lever 13. (hen the truck and carrier are traveling on a horizontal section of the track and the carrier is swinging downward from a side of the truck, the pin 10 is pressed into engagement with one or the other of the two upper detents 11. hen the truck approaches a turn in the track the cam-rail 14 engages the roll 15 and depresses the upper end of the lever 13 against the action of the spring 12, which withdraws the pin 10 from the detent 11 for 11 with which it has been in engagement. This frees the carrier so that it can swing on its pivotal connection with the I fixed in the frame of the carrier.

' of the rod.

truck and retain its pendent position while passing the turn in the track. ,After the truck has passed theturn in the track and the cam-rail 14 frees the lever 13, thelatter through th action'of spring 12 projects the pin 10 to engage the detent that may have been turned in line with the pin. This engagement of the pin with the detent will hold the carrier against turning on the truck while the latter is traveling on either a vertical or horizontal section of the track. As a further precaution against swaying of the carrier guides 16 (Figs. 2, 13) are provided to engage the rolls 17 on the back of the truck 2, and the guides 18 to engage the rolls 19 on the cornersof the carrier. The guides 16 and 18 extend parallel with the straight portions of the track.

Means are provided for actuating the unloading mechanism at the particular station where the load of a carrier is to be discharged. On the side of the carrier 9 (Figs. 11-13) is the actuating dog 20 adjustable on the detented rod 21. The dog is held in its adjustments on the rod against accidental displacement by thepawl 22 pressed by the spring 23 into engagement with the detents By adjustment on the rod 21 the actuating dog 20 can be set to actuate the unloading mechanism atvthe particular station at which the'load of the carrier is to be discharged. This unloading mechanism will be described further on.

is the indicator 24 slidable on the rod 25 .ward movement of the indicator on the rod 25 is limited by the head of the bolt 26 passing through the indicator into the frame of the carrier. The indicator 24 has two adjustments. in and out, on the rod 25, and is held in either of these adjustments by the pawl 221 pressed by the spring 231 to engage a notch at either end of the rod 25. This indicator 24'is designed to show whether or not the carrier 9'is loaded; to permit a. loaded carrier to passany statlon. at which.

a load is waiting tobe taken up by an- The outother carrier, and also to enable an empty carrier to actuate mechanism to position a waiting load so as to be taken up by the approachingempty carrier. It may be stated here that the carriers, in the preferred construction shown by way of exemplification, receive the loads projected into their path, while the respective carriers are on the ascending side of the track, and discharge their loads on the descending side of the track.

The mechanism for receiving the articles to be transported and depositing them into an ascending carrier will now be described. (Figs. 35.) At the receiving station is a slide 27 provided with rolls 29 to travel in the grooved rails 30. Hinged to this slide is the swinging shelf 28 to receive the articles to be transported preliminary to being loaded into the approaching carrier 9. This shelf is composed of fingers positioned to tends to throw the lever to the left, as shown by dotted lines in'Fig. 4. Whenthe lever is moved, the pawl 38 being in engagement with the stud 36, it carries with it the slide 27 against the action of the weight 31. By means of the turn-buckle 40 the tension of the spring can be regulated to meet the requirements. This movement of the slide 27 to the left positions the shelf 28 in the path oftravel of the carrier. By pressing on the pedal of the lever 37 the latter can be pressed to the right, as shown by full lines in Fig. 4, so that the pawl 38 engages the stud 36. The lever 37 is held in this position to the right by the spring catch 41, the recess in the upper side of which receives and latches with the pin 411 on the lever 37 as shown in Fig. 19. The catch 41 is, fixed on the inner end of the shaft 42. On the outer end of the shaft 42 is the arm 49 connected at its extremity by the rod 48 with one arm of the bell-crank 47. The other arm of the bellcrank is connected by the rod 46 with th arm 45 on the rock-shaft 44. On the latter is the trip 43 in a position to be struck by the indicator 24 on the approaching carrier, that is, if the indicator has been adjusted to operate a loading mechanism. If the carrier has already been loaded, and the indicator accordingly adjusted, the trip 43 will not be struck and the shelf 28 willnotbe moved. from its position at the right, as shown by full lines in Fig. 4. In Fig. 3 the two paths of the indicator 24 are indicated by the two dotted lines X, Y. While traveling in one of these paths the indicator 21, when the carrier is empty, will strike the trip as; and while travelingin mechanism for positioning the dog 20, previously described, on the loaded carrier leaving the station, so that the dog will actuate the unloading mechanism at the station where the load is to be discharged from the carrier. (Figs. 3-7.) This selective mechanism comprises the bars 50, 51 secured at their outer endsto the sleeve 521 journaled on the pintle 52. On the inner ends of these bars are the lugs 65 pivoted to the arms 64 carried by the rock-shaft 63. The inner upper end of the bar 50 is horizontal and slidable thereon is the selector 55 to engage the dog 20 of the approaching carrier when the selector is positioned for that purpose. The guides 53, 541 are pivoted at their upper ends to the selector 55 and at their lower ends have sliding connections with the bar 51. These sliding connections permit the guides to moveto accommodate the adjustment of the selector on the horizontal part of the rod 50. There is considerable space between the lower endso'f the guides 53, so that the dog 20 on the approaching carrier will pass between them, no matter where the dog may happen to be on the bar 21. (Fig. 12.) The upper ends of the guides 53, 5 1 converge toward the selector so that the dog 20 entering between their lower ends will be directed to the space between the jaws 551 on the selector. Owing to the action oi the spring-pressed pawl 22, which holds the dog with a yielding pressure on the rod 21, the dog can be moved along the rod when it is engaged by the guides 53, 54-. The location of the selector determines the position of the dog 20 on the carrier so that it will actuate the unloading mechanism atthe particular station where the load is to be discharged.

At each sending station mechanism is provided for setting the selector 55 to position the actuating dcg20 on the loaded carrier so that the dog will actuate the unloading mechanism at the station where the load is to be discharged. Connected with the selector 55 is one end of the rod 57 (Figs. 6, 7), the other end of which is shdable in the brackets 58. Fixed on the rod 57 between the brackets 58, is the hand-piece 56, carrying a pawl 61 pressed by the spring 60. The finger of this pawl operates toengage the notched edge of the station-indlcator plate 59 and there holds the hand-piece in its adjustments. The plate 59 extends parallel with the path of travel of the hand-piece 56 on the rod 57, the limits of the travel being between the brackets 58. In the edge of the plate 59 is a series of notches, one for each discharging station, and opposite to each notch is a number to designate a discharging station. When it is desired to unload the carrier at a particular station theoperator moves the hand-piece 56 into engagement with the notch having the number of that station. This adjustment of the hand-piece moves, through the rod 57, the selector 55 on the arm 65 so that the jaws 551 will be in a certain horizontal position. As the carrier approaches the station, its dog 20 passes between the guides 53, 51- and is directed to the space between the jaws 551. This will position the dog 20 on the rod 21 (Fig. 12) so that it will actuate the unloading mechanism at the particular station where the load is to be discharged. A difl'erent position of the dog 2-0 on the rod 21 will actuate a different unloading mechanism. The unloading mech anism will be described further on.

The selective mechanism is normally held out of engagement with the dogs 20 of passing carriers by spring 62 (Fig. 6) acting on the shaft 63. The spring turns the shaft so that the arms '61, which are pivoted to the bars 50, 51 forming the principal frame of the selective mechanism, will move such mechanism to the position shown by full lines in Fig. 7. When in this position the guides 53, 5t and the selector will be out of the path of the dogs 20 on the passing carriers. When an empty carrier approaches and its indicator 21 engages the trip 13 (Fig. 4F.) andthrough the intervening mechanism previously described, the slide 2? is thrown forward to place the load on the shelf 28 in the path of the carrier, then the projection 66 (Figs. 5, 7) on the slide 27 engages the arm 67 on the rockshaft 63 and turns the latter against the action of the spring 62 (F 6) to place the selective mechanism in position so that the dog 20 on the carrier will be directed to the jaws 551 of the selector 55. As the selector has been previously set by the operator, the dog 20 will be positioned to operate the unloading mechanism at the particular station where the carrier is to be discharged. This movement of the rock-shaft 63., through the action of the projection 66, turns lever 68 (Figs. 37) and through the rod 69 moves the cam 70 into the path of the indicator 24: on the approaching carrier. When the indicator strikes the cam 70, the indicator is moved to its other position, showing a loaded carrier, and consequently will not trip the loading mechanisms at the succeeding stations.

The swinging shelf 28 of the loading mechanism is pivoted to the slide 27 (Figs. 4, 5) so that it can be swung upward and dump its load on the station shelf should the mechanism operate so imperfectly as to position the shelf in the pathof an upwardly moving carrier already loaded. With the loaded shelf 28 in the path of an unloaded carrier 9, as the carrier passes the station the fingers forming the bottom of the carrier will pass between the fingers of the shelf 28 and pick up the load previously placed on the shelf. As the carrier continues its upward movement the roll 19 (Figs. 1113) at one of thecorners of the carrier and traveling upward between the guides 18 strikes and moves the cam 71 (Figs. 4, 5) outwardly. This movement of the cam 71, through the rod 72 and arm 7 8 rocks the shaft 74 so that the lever 75 on said shaft will engage the projection 381 on the pawl 38 and frees the latter from the stud 36 on the slide 27. It is to be observed that this operation takes place while the slide is in an advanced position with the lever 37 engaged with the same as shown by dotted lines in Fig. 4. hen the slide 27 is freed from the lever 37, it is retracted from the path of the carriers by the weight 81, as shown by full lines in Fig. 4, the lever remaining in the dotted line position through the action of the spring 39. Should the operator desire to despatch another load from this table, he places the articles on the shelf 27 and presses down on the pedal of the lever 37 so that the lever is turned back to engage the pawl 38 with the stud 36, and the pawl 41 again engages the pin 411 on the lever. hen so arranged the mechanism is set so as to be put in operation by the indicator 24 of the next unloaded carrier engaging the trip 43, as previously described.

The mechanism for discharging the load from the carrier when the latter arrives at its destination will now be described. The pivoted shelf 76 (Figs. 8-10) of the receiving mechanism is provided with fingers to register with the intervals between thefingers of the carriers. The movement of this shelf is controlled by the lever 7 7 and its connections acting through rod 78- and lever 79. The shelf is normally held in a raised position out of the path of descending carriers by the latch 80 engaging mechanism at the lower end of the lever 77. The pawl 81 acting through the rock-shaft 82 upon which it is mounted and which in turn rocks the lever 83 and thereby longitudinally displaces the connecting rod 84 (to the upper extremity of which lever 83 is attached) when in the downward path of an actuating dog 20 on any carrier, releases the latch 80 and allows the lever 77 to move upward impelled by the spring 85 acting through the lever 86, thereby depressing the swing shelf 76 into the path of the carrier to pick up the load from the same. The moving speed of these parts is governed by the dash-pot 87, plunger88 and connection 89 to lever 86.

The lever 77 is controlled by a slide 90 (Figs. 1618) carrying rolls 91 which run on rod 92, and the slide is held from rotation about the rod by guides 93 which inclose roll 94. Journaled in slide 90 is a rock-shaft 95, one end of which engages the slot 771 of the lever 77, while pinned to shaft 95 is a bell-crank 96 and a latch-collar 97 having a shoulder against which bellcrank latch 98 may act to keep the rockshaft 95 from rotating when held in engagement by spring 99.

The bell-crank restoring cam 100 is fixed at the upper end of the slide movement and so adjusted as to rotate the bell-crank 96 into the path of truck wheel 4 of the carrier 9 when shelf 76 is depressed to receive a load; the rock-shaft being kept from rotation by bell-crank 98 acting on latch-collar 97, the slide 90 is carried down by the descending carrier 9, thereby elevating the shelf 76 to a position out of the path of the carriers. But when the shelf 76 becomes elevated and slide 90 reaches its downward limit of travel, the heel of the bell-crank latch 98-passing the head of latch 80 and striking on its hub 801, is disengaged from the latch-collar 97, thus permitting further movement of the truck wheel 4 to rotate bell-crank 96 out of the path of descending carriers while the heel of the bell-crank latch 98 thereafter engages the latch 80 and retains the station mechanism from engaging passing carriers until again released and restored by a carrier destined to deliver at that station. The downward movement of the slide 90 acts through roll 94 and cam 101 to move theindicator 24 on the carrier to the unloaded posltlon.

At different discharging stations the cam 81 has a different position on the shaft 82, the relative position of the shaft to the pass ing cars being the same for all stations, from the positions of such cams on their shafts at the other station. Consequently the positioning of an actuating dog 20 on its rod 21 will determine the pawl and station where the unloading mechanism will be actuated.

In sending a load from one station to another, the operator sets the hand-piece 56 (Figs. 6, 7) to the notch opposite the numeral designating the destination of the load and places the load on the swing shelf 28, and stepping on the pedal of the lever 37 (Fig. 4) brings it back into engagement with the stud 36 by latch 41 until the approach of an empty carrier. The load indicator 24 at the back of an empty carrier engaging the trip 43 releases the lever 37 and permits the spring 39 to slide the loaded shelf 28 into the path of the carrier; and the selector 55 (Figs. 6, 7 by the action ofv the slide shelf arm 66 on rock-shaft lever '67, enters the path of the actuating dog 20 on the carrier and locates the said dog to operate the unloading mechanism at the desired station. As the carrier passes through the station, the load indicator 2% becomes set to the loaded position by the action of the cam 70, and the roll 19 011 the carrier acting on the cam 71, after a load is picked up, releases the slide 27 from the lever 37 and pawl 38 and permits the counterweight 31 to restore the slide to its normal retracted position.

When a carrier approaches the station for which its load is destined, the actuating dog 20, which has been set to engage the pawl 81 at that station, operates such pawl to release the swing shelf 76 and to permit its descent to a position for stripping off the load at the same time that the slide 90 rises to a point where the bell-crank 96 will permit the descending carrier to engage it and restore the station to its normal position out of the path of the carriers, while the downward movement of the slide 90 and carrier 9 permits the cam 101 to restore the load indicator 24- on the back of thecarrier to the empty position.

Having thus described my invention and set forth a construction embodying the same, what I claim as new and desire to secure by Letters Patent of the United States is 1. In a conveying apparatus, a way, a carrier adapted to travel on said way, means for actuating said carrier, despatching and load receiving devices located along the path of travel of said carrier and having parts thereof adapted to be moved into cooperation with said carrier to load and unload the same, means for moving said parts of said receiving devices into said cooperation to unload said carrier and means operable by and of said despatching devices for preventing the carrier from cooperating with any other despatching device after receiving a load until said load is delivered at a predetermined one of said receiving devices.

2. In a conveying apparatus, a way, a carrier adapted to travel on said way, means for actuating said carrier, despatching and load receiving devices located along the path of travel of said carrier and having parts thereof adapted to be moved into cooperation with said carrier to load and unload the same, adjustable means at each despatching device for pre-determining the receiving station to receive the load on said carrier, means for moving said parts of said receiving devices into said cooperation to unload said carrier, and mechanism on said carrier operable by said adjustable means to prevent the cooperation of said carrier with any other despatching device until the load is discharged. at its pie-determined receiving device.

3. In a conveying apparatus, a way, a carrier adapted to travel on said way, means for actuating said carrier, despatching and load receiving devices located along the path of travel of said carrier and having parts thereof adapted to be moved into cooperation with said carrier to load and unload the same, means to guide said movable parts which unload said carrier, into position to cause the unloading of the latter, adjustable means at each despatching device for predetermining the receiving device to receive the load, means to move said unloading parts along said guiding means, mechanism on said carrier adapted to be set by said ad justable means to prevent the cooperation of said carrier with any other despatching device until the load is discharged at its predetermined receiving device, and means at said receiving device. for releasing said mechanism to permit said carrier to be re-- loaded.

4. In a conveying apparatus, a way, a carrier adapted to travel on said way, a despatching device located along the path of travel of said carrier, receiving devices located along the path of travel of said carrier, mechanisms at the receiving devices adapted to be brought into the line of travel of the carrier to unload said carrier, setting means adjacent the receiving devices and mechanism on the carrier adapted to be operated by said setting means at the receiving devices to permit said carrier when unloaded to operate the carrier-loading mechanism.

5. In a conveying apparatus, a way, a carrier adapted to travel on said way, means for actuating said carrier, despatching devices located along the path of travel of said carrier, receiving devices also located along said path, said despatching devices each adapted to load material upon said carrier, and means, operable by a given despatching device for preventing said carrier from cooperating with another of said despatching devices after receiving a load until said load is delivered at a predetermined one of said receiving devices, said last mentioned means operating substantially independently of the weight of said load, means to reset the means last aforesaid at substantially the time that said load is delivered and independently of said load, and means for effecting said delivery from said carrier to said predetermined receiving device.

6. In a conveying apparatus, a way, a carrier adapted to travel on said way, means for actuating said carrier, automatic carrier-loading devices located along the path of travel of said carrier, receiving devices also located along said path, and means, operable by a given carrier-loading device independently of the weight of the load to be despatched from the latter, for preventing said carrier from having its load discarrier adapted to travel on said Way, means for actuating said carrier, automatic carrierloadmg devices located along the path of travel of said carrier, said carrier-loading devices each adapted to load material upon said carrier, and means, operable by a given carrierloading device independently of the Weight of the load to be despatched from the latter, for preventing said carrier from distributing an article to be despatched from another of said loading devices after receiving said load until the load is removed from said carrier.

8. In a conveying apparatus, a Way, a carrier adapted to travel on said Way, means for actuating said carrier, despatching stations located along the path of travel of said carrier and having automatic carrier loading apparatus thereat, and means operable from a given station independently of the weight of the load to be despatched therefrom, for preventing said carrier from receiving a second load from the loading apparatus of any subsequently encountered station, after receiving said first load, until the later is removed from said carrier.

9. In a conveying apparatus, a Way, a carrier adapted to travel on said Way, means for actuating said carrier, despatching stations located along the path of travel of said carrier and having automatic carrier loading apparatus thereat, means operable from a given station independently of the Weight of the load to be despatched therefrom, for preventing said carrier from cooperating with the loading apparatus of a subsequently encountered station, after receiving' said load, until the load is removed from said carrier, and means for automatically removing said load and re-setting said preventing means to permit said carrier to be reloaded.

10. In a conveying apparatus, a Way, a carrier adapted to travel on said Way, means for actuating said carrier, despatching stations located along the path of travel of said carrier and having automatic carrier loading apparatus thereat, means operable from a given station independently of the Weight of the load to be despatched there from, for preventing said carrier from cooperating With the loading apparatus of a subsequently encountered station, after receiving said load, until the load is removed from said carrier, a plurality of carrier unloading devices, and means, adapted to be set from the station at Which said load Was despatched, for unloading said carrier to a predetermined one of said devices.

11. In a conveying apparatus, a Way a carrier adatped to travel on said Way, a despatching device located along the path of travel of said carrier, receiving devices located along. the path of travel of said carrier, means at the despatching device adapted to project into the line of travel of the carrier, a load WhereWith to load said carrier, mechanism on the carrier to prevent said means from projecting its load into the path of said carrier When the latter is already loaded, means for setting said mechanism on the carrier, and means, independent of the load, for unsetting said mechanism on the carrier When said carrier is unloaded.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing Witnesses, this 30th day of March A. D. 1909.

JAMES T. GOWVLEY. Witnesses:

L. Gr. BARTLETT, A. L. MORSE.

copies or this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washingtoml). 0."

Corrections in Letters Patent No. 1,179,804.

It is hereby certified, that in Letters Patent No. 1,179,804, granted April 18, 1916, upon the application of James T. Cowley, of Boston, Massachusetts, for an improvement in lonveying Apparatus, errors appear in the printed specification requiring correction as follows: Page 5, line 40, claim 1, for the Word and read any; pages 5-6, lines 1301, claim 6, for the Word distributed read disturbed; page 6, line 20, claim 7, for the Word distributing read disturbing; same page, line 36, claim 8, for the Word later read latter; same page, line 77, claim 11,

strike out the comma; 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 @ffice.

Signed and sealed this 9th day of May, A. D., 1916.

R. F. WHITEHEAD,

Acting Commissioner of Patents.

[SEAL]

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