US2558983A

US2558983A - Barrel cleaning apparatus

Info

Publication number: US2558983A
Application number: US79789A
Authority: US
Inventors: Frank B Roberts
Original assignee: Individual
Current assignee: Individual
Priority date: 1949-03-05
Filing date: 1949-03-05
Publication date: 1951-07-03
Anticipated expiration: 1968-07-03

Description

July 3, 1951 F. B. ROBERTS BARREL CLEANING APPARATUS 5 Sheets-Sheet 1 Filed March 5, 1949 INVENTOR. ''PAA/K Kaat-,e 7s

TfA/EY July 3, 1951 F, B, ROBERTS 2,558,983

BARREL CLEANING APPARATUS Filed March 5, 1949 3 Sheets-Sheet 2 20 22 L- no 8| K a7 108 99 7' 66 e940 12 |02' 2??.6. 89 9| wem-:e 72' J2ee?. 7.' 994 f,

5o 94 INVENTOR. 9a 915 BY fAA/A/ foaes 24 f 97 96 ATTOAA/E July 3, 1951 F. B. ROBERTS 2,558,983

BARREL CLEANING APPARATUS Filed March 5, 1949 5 Sheets-Sheet 3 INVENTOR. J''Pa/.vA/ afs 7' TOAIVEY Patented July 3, 1951 UNITEDv STATES PATENT OFFICE 15 Claims.

This invention relates to a barrel cleaning apparatus.

The general object of the invention is to provide an improved apparatus for cleaning` the interior of a barrel.

A more specific object of the invention is to provide a barrel cleaning apparatus inclu-ding a rotating brush and wherein novel means is provi-'ded for causing the brush to move along the interior of a barrel to clean the inner surface thereof.

A further object of the invention is to provide a barrel cleaning apparatus including novel means for supporting and/or driving a brush of a barrel cleaning apparatus.

An additional object of the invention is to provide a barrel cleaning apparatus with novel means for supporting and advancing a barrel relative to a cleaning brush.

Another object of the invention is to provide a barrel cleaning apparatus includinga drive screw and wherein novel means operated by the screw causes the barrel to move relative to a cleaning brush.

Another object of the invention is to provide a means for holding a barrel in position on a barrel cleaning apparatus.

Other objects and advantages of my invention will be apparent from the following description taken in connection with the accompanying drawings, wherein:

Fig. l is a top plan view of the barrel cleaning apparatus embodying the features of my invention;

Fig. 2 is a side elevation of the barrel cleaning apparatus;

Fig. 3 is an end view taken along the line 3 3, Fig. l;

Fig. 4 is a sectional view taken on line 4 4, Fig. 2;

Fig. 5 is a fragmentary section taken on line 5 5, Fig. l;

Fig. 6 is an enlarged section taken on line 6 6, Fig. 3;

Fig. 1 is an enlarged section` taken on line 1 1, Fig. 2;

Fig. 8 is a perspective view with parts broken away, showing the drive and clutch mechanism of my invention;

Fig. 9 is an oblique, elevational view, partly in section, showing the lever lock mechanism;

Fig. 10 is a top plan view of the half nut associated with my clutch mechanism, and

Fig. 11 is a sectional view taken on line II-I I, Fig. l0..

Referring to the drawing by reference characters, I have shown my invention as embodied in a barrel cleaning apparatus which is indicated generally at Iii. As shown the apparatus includes a plurality of supporting standards I I which at one end are arranged in pairs to support a transversely extending plate I2 which supports a pair of channels I3. At one end the channels I3 support a bed I4' and at thev other end the channels are engaged by the base members I5 of an electric motor I`6. The motor I6 is provided with a shaft I1 on which a pulley I1 is mounted. The pulley, through a belt I8, drives a pulley I9 mounted on a shaft 20, which is supported on bearing blocks 2l mounted on the channels I3.

The shaft 29 supports a sprocket 2| engaged by a chain 22. The chain 22 passes over a second sprocket 23 mounted on the end of a feed screw 2.4,. and the construction is such that when the motor I6 operates, the feed screw 24 will be rotated. The feed screw is supported in bearing blocks 25 and 26 mounted on the under sidev of a base member 30. The base member 3B, which is in the nature of an inverted channel, is attached at one end beneath the channels I3 and extends at right angles thereto and is supported remote from the bed I4 by a leg 3l The base member 30 forms a trackway for a carriage indicated generally at 32. This carriage` isV provided with flanged wheels 33, which engage the outer edges of the base member 30 so that the carriage may roll reciprocatingly during the barrel' cleaning operation. The base member is provided with a pair of transversely arranged inverted channels 34- which are provided with bearings 35 and shafts 36. The shafts 36 support wheels 31 which may be rubber covered and are spaced apart to receive a barrel 31 thereupon. One of the shafts 36 includes a sprocket 38 which receives a chain 39.

The chain 39 passes over a sprocket 21 mounted on a shaft 26 which latter is journalled in bearings 28. A second chain 29 passes over a sprocket 39 secured to the shaft 28. The chain 29 also passes over a sprocket 4i@ on the feed screw 24. In order to drive the sprocket the feed screw 24 includes a keyway 4l, in which a key 42 on the sprocket 43 slides, and the construction is such that when the feed screw 24 is driven from the motor I6 and is rotated, the sprocket 40 will causel the chain 219 to drive the shaft 28, thus driving the sprocket 21 and the chain 39 to rotate one of the shafts 36 and a pair of the wheels 31 so that the barrel which rests upon the wheels 31 will be rotated.

The carriage 32 in the end remote from the motor I6 includes a pair of angle members 45 which are held in place as by rivets 46. The angle mem-bers l5v extend upwardly to 41 and support a transverse handlev 48.

The carriage 32 also includes a pair of guides 49, between which a stop lever 50 operates.. The stop lever 50 has a pair of yokes 52 thereon which pivotally engage a transverse pin 5 I rIhis transverse pin 5l' is mounted on a slide member 5I' which operates between the guides 49 previously mentioned'. The: lever 56 includes. a depending 3 portion 53', at the lower end of which I arrange a roller 54. This roller 54, when the carriage is at one end of its movement, engages a cam member 54 to rock the lever 50. The lever 50 includes an upwardly directed portion 53.

Mounted on the lever I show a stop member 55 Y Y which has a head 56 thereon. The stop member is surrounded by a spring 51 which engages the head 56 and also engages a plate 58 mounted on the carriage 32. As a result the lever 50 is normally urged to the right in Fig. 5. The upper end of the lever 50 includes a rod 59 which threadedly engages the lever and which is held in place by an adjusting lock nut 60. 'Ihe rod 59 has a rounded barrel engaging head 6| thereon and the construction is such that when the roller 54 is free from engagement with the cam 54', the spring 51 will normally urge the head 6| against the barrel, as shown in full line position in Fig. 2. When the carriage reaches its extreme movement to the left in Fig. 2 the roller 54 will engage the cam member 54' and move the lever 50 to the dotted line position in Fig. 2 so that a barrel may beV readily removed.

The'carriage 32 at the end remote from the head member 6I includes a bracket 6-2, which is mounted on the adjacent channel 34. The bracket V62 includes an upwardly directed portion 64 which is adapted to engage the end of the barrel remote from the end engaged by the head member 6|. Y

The carriage 32 includes depending side members 65 which support a lower channel 66. Y This channel 66 at one end includes an L-shaped bracket 61 which has an aperture 68 receiving I the sleeve 1I to thus limit the downward movement of the pin. A spring 13 surrounds the pin 12 and at its upper end engages a boss 13. The lower end of thespring 13 engages the channel 66. Mounted on the upper end of the boss 13 and secured thereto by welding I provide a half nut housing 14, best illustrated in Figs. and 11. The`housing 14 is semi-cylindrical and slidably receives a half nut 15. The half nut is slidably retained in 4position within the housing 14 by sliding engagement with a bolt 16 arranged within a bore 16.

Y'I he bolt 16 has an extension 11 and is held in position by a nut 18. A compression spring 19 surrounds the bolt 16 and at one end engages the inside of the'housing 14, the other end being in engagement with thehalf nut 15. Y

The barrel cleaning brush is indicated at 80 and is mounted on a shaft 8| which is pivoted onV aY shaft 8,2,mounted upon an arm 83. The arm 83 is mounted at the extreme end of the base memberw30. Theend of the shaft Y8| at the right in Figs. 1 and 2 includes aY pulley 84 over which a belt l85 passes. The belt 85 also passes over a pulley 86, mounted on the motor shaft I1 previously described, and the construction is such that'when the motor I6 operates it will cause thebrush 80 to rotate.

arm 81, similar to the arm 83 and mounted on the base member 30, has a slot 88 which serves as a guide for the shaft 8| as the latter moves about its pivot 82. To move the shaft 8| about the pivot 92 upward to the position shown by the dotted lines of Fig. 2, I provide a push rod 89, having an enlarged end 99. The lower end of the rod B9 is threaded as at 9|l to a substantially square slide member 92 arranged within a square housing 93 which is in turn secured to the chanj nel36.

The lower end of the slide member 92 supports a roller 93 on a pin 94. The roller 93 is adapted to be engaged by a conical cam member 95 slidill v to one of the angles 41.

v ment of the arm H8 to a position as shown by` ably mounted on the drive shaft 24. An arm 96, fixed to a'boss 91 on a shaft 98, is connected to the cam member 95. The shaft 98 is arranged beneath the channel member 30 and is slidably supported by bearing members 99 secured to the lower side of the channel 30. The end of the shaft 98, adjacent the carriage 32, is provided with a check umember |00 and a cushion spring IOI, which latter cushions the stopping action of the carriage. The shaft 98 also includes stop members |02 and |02. The shaft 99 includes a bracket |03 (Fig. 6), the outer end of which supports an adjustable nut |04 which is adapted to engage a switch lever |05 of a switch |06 mounted on the lower side of the channel 30. Thus when the carriage 32 is moved to its extreme rearward position (to the left in Fig. 5), the shaft 98 by engagement of the stop member |02 with a block |01 fixed to the `channel 66 will cause the rod 98 to move to the left, thus moving the conical member and raising the shaft 8| and at the same time actuate the switch |06 to its off position.

As the carriage 32 travels toward the motorV end of the device, the block |01 will strike the member |02 and move the rod 98 to again actuate the switch |06, this time to on position.

So that the carriage 32 may be moved freely -f along the base 30, I have provided a clutch release mechanism which includes an arm IIO, se-

cured to a shaft I I I, which is journalled in bear-V ing blocks I I2 and II 3, which are fixed to the channel 66. The shaft II I also supports a clutch arm II4 which at its outer end has a slot II5 which is adapted to secure the extension 11 on the bolt 16. The arm |I0 passes through a slot I I1 in a guide I I6 which is secured as by welding The guide has a locking lever II8 pivoted as at II9 thereto. The arm ||8 hasV an eccentric surface |20, adapted to engage and secure the arm I0 in position. The arm I I8 is urged toward locked position by a spring .|2|, arranged about the pivot II 9 and having one end secured in a hole |22 in the arm II8, the other end being secured by abolt |23 in the guide |I6. Thus it may be seen that movethe dotted lines in Fig. 9 will free the arm I I0 and allow it to be moved upwardly, thus rocking the leverY I I4 downwardly and removing the nut 15 from' engagement with the shaft 24.

To provide for a limit stop for the carriage, I have arranged an angle |25, secured to the side of the channel 30.V The angle |25 carries an adjustable limit bolt |26, adapted to engage the forward channel 34 on the carriage 32. The'operation of my barrel cleaning apparatus is as follows:

Assuming that the carriage 32 is at its extreme left-hand position: In this position the cam 54' will have engaged the rollerv 54 and will have rocked theV lever 50 so that the barrel engagingV member 6| has been moved to its extreme lefthand position; also, the shaft 8| will be in the'- raised .position due to the engagement of `the camzsurfaceg with the roller 93 so .that the lat- 'terhas raised `the push rod-89 andthe latter has raised the shaft member 8l.

A barrel 3l is then placed on the wheels 31, `with the open end position of the barrel engaging the barrel engaging member -64 Aand with the lbrush 8f3 Vin the'barrel. The arm H0 is then rocked and locked by the locking lever HB. The extension 'Il is thus moved downwardlyycausing the half-nut 15 to be lowered and freed from the feed screw 24. The handle 48 is then pushed towardsthe motor end of the apparatus, thus advancing the carriage with the barrel thereon until the block H11 on the channel '55 engages ythe .member 02 on the rod 98. Whereupon the handle 48 is further moved until Athe limit stop bolt v126 is engaged by the forward channel 34 on the carriage 32. This causes the rod 98 to be moved towards the motor end of the apparatus, thereby causing the bracket |03 to be moved to free the switch U35 so that the latter moves to its normal closed position to actuate the motor I'G. Buring this operation of starting the motor the cam member 95 has =been .moved away from the roller 93 so that the shaft 8| has been lowered, 'whereby the brush engages the interior of the barrel, as shown in Fig. 2. With the motor now driving the brush while the latter engages the barrel, the operator moves the locking lever H8 to free the arm HEB, thus permitting the spring 4.13'to raise the half-nut to feed screw engaging position. The half-nut l thus lengages the screw and as the screw rotates the halfmut is moved tozthe left, for example in Figs. 5 and 1l. As the half-nut moves it first compresses the spring 19 until the half-nut is moved along the bolt 'I6 until the spring is fully compressed. During this initial axial movement of the half-'nut the halfnut housing 'M has been at rest and there has therefore been an advancement of the carriage 32. During the dwell, however, the brush has been rotating and the barrel has been turning so that the entire inner end portion of the `barrel has been visited by the brush. When the rspring 19 has been fully compressed further movement of the half-nut will cause the carriage 'I4 to be moved, thus moving the brush axially relative to `the'barrel along the inner surface of the barrel. The operation continues until the spring IU'I on the rod 98 is engaged by the engagement thereof with the carriage, whereupon further lmovement of the carriage moves the rod 98,

causing the latter to shift the cam 955 to raise the brush and causing the member AHis to vmove vthe switch |05 to open position. At this time the cam -54 has engaged the roller 54, thus rocking the barrel vengaging .member 5| away Afrom fthe barrel so that the latter can be removed. The operation is then repeated.

From the foregoing description it will be apparent that I have invented a novel barrel cleaning apparatus which can be economically manufactured and which is highly efficient for its intended use.

Having thus described my invention, I claim:

1. A barrel cleaning apparatus including a carriage, means to mount the carriage vfor reciprocation, a xed barrel engaging member at one end portion of said carriage, a barrel holding member pivoted on said carriage at the other end thereof, means to normally urge the holding member to engage a barrel on the carriage, means operable to shift `the holding member away from a barrel when the carriage reaches the limit yof its movement in one direction, a brush shaft; a pivoted support for the shaft adjacent to one end thereof, a brush mounted at the other end of said shaft, said brush being disposed in Athe path of 'travel of a barrel on said carriage, said brush being adapted to move into a barrel as the carriage is advanced, means to rotate the ybrush, and lmeans to shift the brush shaft about its pivoted support.

2. A barrel cleaning apparatus including a reciprocatingly mounted carriage, means to hold a barrel on the carriage for rotation thereon, means to rotate a barrel engaged by said `holding means, a feed screw, means to rotate said feed screw, a half-nut, means to mount the halfnut on the carriage for movement to and from -engagement with the feed screw, clutch means on the carriage and operable to shift the halfnut from engaged position to disengaged position, a brush shaft, a pivoted support for said shaft, a brush mounted on said shaft, said brush being disposed in the path of travel of a barrel on said carriage, said brush being adapted to move into a barrel as the carriage is advanced, means to rotate the brush and means to shift the brush shaft about its pivot.

3. A barrel cleaning apparatus including a trackway, a carriage mounted to reciprocate on said trackway, means to hold a barrel on the carriage for rotation thereon, a feed screw, a half-nut, means to mount the half-nut on the carriage for movement to and from engagement with the feed screw, clutch means on the carriage and voperable to shift the half-nut from engaged position to disengaged position, a brush shaft, pivoted support for said shaft, a brush mounted on said shaft, said brush being disposed in the path of travel of a barrel on said carriage, said brush being adapted to move into a barrel as the carriage is advanced, a motor and means driven by said motor to rotate the brush shaft to shift the brush shaft to rotate a barrel held by said `holding means and to rotate said feed screw.

4. A barrel cleaning apparatus including a carriage, means mounting the carriage for reciprocation, means to rotate barrel on said carriage, a feed-screw, a half-nut, means to mount the half-nut on the carriage for movement to and from engagement with the feed screw, clutch means on the carriage and operable to shift the half-nut from engaged position to disengaged position, a brush shaft, a pivoted support for the brush shaft, a brush mounted on the shaft, said brush being disposed in the path of travel of a barrel on said carriage, said brush being adapted. to move into a barrel as the car riage is advanced, means to rotate said brush, means to rotate said feed screw when the carriage is at one Vlimit of its travel, said feed screw being pitched to cause the carriage to move towards the other limit of its travel when the feed screw is rotated, means to stop rotation of ysaid feed screw when vthe carriage reaches the other limit of its movement and means to raise the brush shaft about its pivot when the carriage reaches `said other limit of its movement.

5. A barrel cleaning apparatus including a trackway, a carriage mounted to reciprocate on said trackway, means to hold a barrel on the carriage for rotation thereon, a motor, means driven by said vmotor for rotating a barrel engaged `by said holding means, Ya switch for the motor, means -to operate the switch, a feed screw,'means whereby said motor rotates said feed screw, a half-nut, means to mount the half-nut on the carriage for movement to and from engagement with the feed screw, clutch means on the carriage and operable to shift the half-nut from engaged position to disengaged position, a brush shaft, a pivoted support for said shaft adjacent to one end thereof, a brush mounted at the other end of said shaft, said brush being disengagement with the feed screw, clutch means on the carriage and operable to shift the halfnut from engaged position to disengaged position, a brush shaft, a pivoted support for the shaft adjacent to one end thereof, a brush mounted at the other end of said shaft, said brush -being disposed in the path of travel of a barrel on said carriage, said brush being adapted to move into a barrel as the carriage is advanced, means to rotate the brush and means to shift the brush shaft about its pivot.

7. A barrel cleaning apparatus including a trackway, a carriage mounted to reciprocate on said trackway, means to rotatably hold a barrel on said carriage, means to rotate a barrel held on said carriage, a feed screw,'a half-nut, means to mount the half-nut on the carriage for movement to and from engagement with the feed screw, clutch means on the carriage and operable to shift the half-nut from engaged position to disengaged position, a brush shaft, a pivoted support for the shaft adjacent to one end thereof, a brush mounted at the other end of the shaft, said brush being disposed in the path of travel of a barrel on said carriage, said brush being adapted to move into a barrel as the carriage is' advanced, means to rotate said brush, means to raise and lower the brush shaft, means to rotate said feed screwV when the carriage is at one limit of its travel, said feed screw being pitched to cause the carriage to move upwards the other limit of its travel when the feed screw is rotated, and means to stop rotation of said feed screw.

8. A barrel cleaning apparatus including a trackway, a carriage mounted to reciprocate on said trackway, means to rotatably hold a barrel on said carriage, means to rotate a barrel held on said carriage, a feed screw, ahalf-nut, means to clutch means on the carriage and operable to shift the half-nut from engaged position to disengaged position, abrush shaft, a pivoted support for the shaft adjacent to one end thereof, a brush mounted at the other end of the shaft, said brush being disposed in the path of travel of a barrel on said carriage, said brush being adapted to move into a barrel as the carriage is advanced, means to rotate said brush, means to rotate said feed screw when theV carriage is at one limit of its travel, means to lower the brush about its pivot when the carriage is at said one limit ofV its travel, saidfeed screw being pitched to cause the'carriage to move towards the other limit of its travel when the feed screw is rotated, means to stopvrotation of said feed screw when the carriage reaches the other limit of its movement, and means to raise the brush about its pivot when the carriage reaches said other limit of its movement. y

9. A barrel cleaning apparatus including a carriage, means mounting the carriage for reciprocation, means to rotate a barrel on said carriage, a brush shaft, a pivoted support for the brush shaft, a brush mounted on the shaft, a feed screw, a half-nut housing, means to mount the half-nut housing on the carriage for movement towards and from the feed screw, a rod on said half-nut housing, the axis of said rod being parallel to the axis of said feed screw, a half-nut inthe housing and slidable along the rod, spring means urging the half -nut towards the end of the housing which is nearest to said brush shaft pivot, said half-nut housing' being mounted to move towards and from the feed screw to shift the half-nut from engaged position tov disengaged position; said brush being disposed in the path of travel of a barrel on said carriage, said brush being adapted to move into a barrel as the carriage is advanced, means to rotate said brush, means to rotate said feed screw when the carriage is at one limit of its travel, said feed screw being pitched to cause the carriage to move towards the other limit of its travel when the feed screw is rotated, means to stop rotation of said feed screw when the carriage reaches the other limit of its movement, and means to raise the brush about its pivot when the carriage reaches said other limit of its movement.

10. A barrel cleaning apparatus including a carriage, means mounting the carriage for reciprocation, means to rotate a barrel on said carriage, a brush shaft, a pivoted support for the brush shaft, a brush mounted on the shaft, a feed screw, a half-nut housing, means to mount the half-nut housing on the carriage for movement towards and from the feed screw, a halfnut slidable in the housing, means urging thehalf-nut towards the end of the housing which is nearest to said brush shaft pivot, said half-nut housing being mounted to move towards and from the feed screw to shift the half-nut from engaged position to disengaged position, said brush being disposed in the path of travel of a barrel on said carriage, said brush being YadaptedV to move into a barrel as the carriage is advanced; means to rotate said brush, means to shift the brush shaft about its pivot and' means to rotateY said feed screw. r

11. A barrel cleaning apparatus including a trackway, a carriage mounted to reciprocate on said trackway, a fixed barrel engaging member at one end of said carriage, a barrel holding member pivoted on said carriage, means to normally urge the holding member to engage a barrel on the carriage, means operable to shift the holdingY member away from a barrel when the carriage reaches the limit of its movement in one direction, a motor, a switch for the motor, means to operate the switch, a feed screw, means whereby said motor rotates said feed screw, a halfnut, means to mount the half-nut on the carriage for movement to and from engagement with the feed screw, clutch means on the carriage and operable to shift the half-nut from engaged position to disengaged position, a brush shaft, a pivoted support for the shaft adjacentto one end thereof, a brush mounted at the other end of saidf shaft, said brush being disposed in the path of travel of a barrel on said carriage, said brush being adapted to move into a barrel as the carriage is advanced, means to rotate the brush and means to cause the brush shaft to rise and to permit it to fall about its pivot.

12. A barrel cleaning apparatus including a trackway, a carriage mounted to reciprocate on said trackway, means to hold a barrel on said carriage, a motor, a switch for the motor, a feed screw, means whereby said motor rotates said feed screw, a half-nut, means to mount the halfnut on the carriage for movement to and from engagement with the feed screw, clutch means on the carriage and operable to shift the halfnut from engaged position to disengaged position a rod adjacentto said feed screw, means to mount the rod for reciprocation, a brush shaft, a pivoted support for the shaft adjacent to one end thereof, a brush mounted at the other end of said shaft, said brush being disposed in the path of travel of a barrel on said carriage, said brush being adapted to move into a barrel as the carriage is advanced, means to rotate the brush about its pivot, means to raise and lower said brush shaft, means whereby said rod is moved by said carriage when the latter is at one limit of its travel to close said switch and start the motor, and means whereby when the carriage reaches the other limit of its movement said rod will Abe shifted to open said switch.

13. A barrel cleaning apparatus including a trackway, a carriage mounted to reciprocate on said trackway, means to hold a barrel on said carriage, a motor, a switch for the motor, a feed screw, means whereby said motor rotates said feed screw, a half-nut, means to mount the halfnut on the carriage for movement to and from engagement with the feed screw, clutch means on the carriage and operable to shift the halfnut from engaged position to disengaged position, a rod adjacent to said feed screw, means to mount the rod for reciprocation, a brush shaft, a pivoted support for the brush shaft adjacent to one end thereof, a brush mounted at the other end of said shaft, said brush being disposed in the path of travel of a barrel on said carriage, said brush being adapted to move into a barrel as the carriage is advanced, means to rotate the brush shaft, said brush being normally disposed to fall by gravity about its pivot, means to raise the brush shaft about its pivot, means including a cam member mounted on said rod, and a push member operated by said cam member and engaging said brush shaft, means whereby said rod is moved by said carriage when the latter is at one limit of its travel to close said switch and start the motor and shift said cam member from said push member to free the brush to contact a barrel, and means whereby when the carriage reaches the other limit of its movement said rod will be shifted to open said switch and to raise said brush.

14. A barrel cleaning apparatus including a trackway, a carriage mounted to reciprocate on said trackway, a fixed barrel engaging member at one end of said carriage, a barrel holding member pivoted on said carriage, means to normally urge the holding member to engage a barrel on the carriage, a motor, a switch for the motor, a feed screw, means whereby said motor rotates said feed screw, a half-nut, means to mount the half-nut on the carriage for movement to and from engagement with the feed screw, means to shift the half-nut from engaged position to disl0 engaged position, a rod adjacent to said feed screw, means to mount the rod for reciprocation, a brush shaft, a pivoted support for the brush shaft adjacent to one end thereof, a brush mounted at the other end of said brush shaft,

said brush being disposed in the path of travel of a barrel on said carriage, Said brush being adapted to move into a barrel as the carriage is advanced, means to rotate the brush shaft, said brush being normally disposed to fall about its pivot by gravity, means to raise the brush shaft about its pivot, said means including a cam member mounted on said rod, and a push member operated by said cam member and engaging said brush shaft, means whereby said rod is moved by said carriage when the latter is at one limit of its travel to close said switch and start the motor and shift said cam member from said push member to free the brush to contact a barrel. and means whereby when the carriage reaches the other limit of its movement said rod will be shifted to open said switch and to raise said brush.

15. A barrel cleaning apparatus including a trackway, a carriage mounted to reciprocate on said trackway, a fixed barrel engaging member at one end of said carriage, a barrel holding member pivoted on said carriage, means to normally urge the holding member to engage a barrel on the carriage, means operable to shift the holding member away from a barrel when the carriage reaches the limit of its movement in one direction, a motor, means driven by said motor to rotate a barrel on said carriage, a switch for the motor, a feed screw, means whereby said motor rotates said feed screw, a half-nut, means to mount the half-nut on .the carriage for movement to and from engagement with the feed screw, clutch means on the carriage and operable to shift the half-nut from engaged position to disengaged position, a rod adjacent to said feed screw, means to mount the rod for reciprocation, a brush shaft, a pivoted support for the brush shaft adjacent to one end thereof, a brush mounted at the other end of said brush shaft,

said brush being disposed in the path of travel of a barrel on said carriage, said brush being adapted to move into a barrel as the carriage is advanced, means to rotate the brush shaft, said brush being normally disposed to fall by gravity,

means to raise the brush shaft about its pivot, said raising means including a cam member mounted on said rod, and a push member operated by said cam member and engaging said brush shaft, means whereby said rod is moved by said carriage when the latter is at the other end limit of its travel to close said switch and start the motor and shift said cam member from said push member to free the brush to contact a barrel, and means whereby when the carriage reaches the said one limit of its movement said rod will be shifted to open said switch and to raise said brush.

FRANK B. ROBERTS.

REFERENCES CITED The following references are of record in the file of this patent:

. UNITED STATES PATENTS Number