US2720423A

US2720423A - Rotary broom making machine

Info

Publication number: US2720423A
Application number: US235704A
Authority: US
Inventors: William H Seavey; Winfred J Mullins; Jessie M Jackson
Original assignee: M R LILLENGREEN
Current assignee: M R LILLENGREEN
Priority date: 1951-07-09
Filing date: 1951-07-09
Publication date: 1955-10-11
Anticipated expiration: 1972-10-11

Description

Oct. 11, 1955 w. H. SEAVEY ET AL 2,720,423

ROTARY BROOM MAKING MACHINE Filed July 9, 1951 251'16615-Sh6e1 l V E'I' l 2 o o 4 2e 29 I i 34B 5 I I i i 0 H I 6 0 3 20 o s M 0 o 'n w lo HI HIM o 0 ll MI INVE T IAM H. Y R CLAUDE D. JACKSON WINFRED J. MULLINS AT TO RNEY Oct. 11, 1955 Filed July 9, 1951 W. H- SEAVEY ET AL ROTARY BROOM MAKING MACHINE H MI ||||H INVENTOR. WILLIAM H. SEAV'EY YCLAUDE D. JACKSON WINERED J. MULLINS AT TORNEY 2 Sheets-Sheet 2 United States Patent ROTARY BROOM MAKING MACHINE William H. Seavey, Claude D. Jackson, and Winfred J.

Mullins, Eugene, Oreg.; Jessie M. Jackson, administratrix of said Claude D. Jackson, deceased, assignors to M. R. Lillengreen, Seattle, Wash.

Application July 9, 1951, Serial No. 235,704

Claims. (Cl. 300-14) This invention relates to rotary broom making machines and is particularly adapted for applying bristles to the hubs of rotary brooms used in street cleaning machines and the like.

The primary object of the invention is to provide a bristle feeding mechanism for feeding the bristles on to the hub of the broom underneath the bristle binding cable automatically.

In the applying of the bristles to the hub of the broom, it is necessary to maintain the bristles in a definite predetermined arrangement relative to the hub and the binding cable applying the bristles to the said hub. Our new and improved feeding mechanism accomplishes this object entirely automatically.

These and other incidental objects will be apparent in the drawings, specification and claims.

Referring to the drawings:

See

ing mechanism is supported by the movable carriage 13, which is mounted to the tracks 14 by way of the trunnion wheels 15, best illustrated in Figure 4. Hanger bars 16 extend down from the carriage and connect to the feeding table supporting the same in a predetermined position relative to the broom hub and the take up roller.

Extending downwardly from thetable 12 is a bracket 17 for supporting a feeding wheel 18. This wheel engages the grooves 19 of the hub of the broom, as best illustrated in Figures 4 and 6, and as the broom hub is revolved this feeding roller moves the feed mechanism longitudinally of the machine at the same rate of speed as the pitch of the grooves 19 on the broom hub, the object of which will be more fully described later.

Extending beyond the end of the feeding table 12 are flat bars 21 forming guides, as best shown in Fig. 3.

1 These bars have a ninety degree twist formed between Figure 1 is a plan view of a rotary broom making machine.

. Figure 2 is an enlarged detailed fragmentary view, taken on line 2-2 of Figure 4, looking in the direction indicated.

Figure 3 is a fragmentary perspective view of the bristle feeding table, including the feeding belt supporting brackets.

Figure 4 is an end sectional view, taken on line 4-4 of Figure 1.

Figure 5 is a side view of Figure 1.

Figure 6 is a fragmentary plan view of the feed roller in relation to the hub of the broom, taken on line 66 of Figure 4.

Figure 7 is a detail sectional view of one of the driving rollers for the feeding belts.

Referring more specifically to the drawings:

Our new and improved rotary broom making machine consists of a framework 1 for supporting the broom hub 2 and the take up roll 3. The hub of the broom 2 is so constructed as to be removably mounted to the shaft 4, which in turn is journalled within bearings 5.

The take up drum 3 is permanently journalled within the bearings 6, and is also of well known practice. The shaft 4, including the broom hub 2 are rotated by the motor 7, transmission 8 and the drive chain 9. The take up drum 3 is driven from the transmission 8 by the chain 10. When the hub 2 is having the bristles applied thereto, it is driven by the transmission while the take up drum 3 is permitted to idle transferring the binding cable 11 from the take up drum 3 on to the hub 2. A hold back brake may be located within the transmission resisting the rotation of the take up drum 3, maintaining the binding cable in a taut condition.

When the bristles are being removed from the hub 2, the shaft 4 is allowed to idle while the take up drum 3 is driven by the transmission. Our invention primarily consists of providing a bristle feeding mechanism, comprising a feeding table 12 having upstanding sides forming vertical guides, as best shown in Fig. 3. This feedthe end 20 of the feeding table 12 and their extremities 22. These bars have idler rollers 23 journalled to their outer ends in a vertical position. A pair of feed belts 24 are trained about these pulleys at their one end and about the horizontal rollers 25 at their opposite ends.

The rollers 25 have sprockets or pins 26 formed thereon and adapted to register with the holes 27 throughout the length of the belts. These sprockets maintain the belts in timed relation to one another. Extending upward- 1y on the top run of the belts 24 are pins 28, between which the brush bristles 29 are aligned and conveyed. The feed belts 24 are driven by the rollers or sprockets 25, from a motor 30, power transmission box 31 and belt 32 in the direction of the arrow (Fig. 4).

In the operation of our bristle feeding mechanism, the bristles 29 are placed between the pins 28 on top of the belts 24 at the point indicated by numeral 33, Figure l. The bristles are carried by the belts underneath the bristle binding cable 11, which forces the central point of the said bristles down between the belts 24 and into the bristle groove 19 of the hub 2, as best illustrated in Figures 1, 2 and 4.

The belts 24 follow the twist of the flat bars 21 coming to a vertical position when they finally reach the idler rollers 23. As the bristles are forced down between the belts by the cable 11, the pins 28 hold the ends of the bristles parallel and opposite to one another so that as the central portion of the bristles are forced into the grooves 19 by the binding cable 11 they will be in their proper radial position from the hub 2. Without maintaining the accurate transverse position of the bristles to the belts throughout the length of the belts, the bristles would not enter the grooves 19 in the proper relative position, therefore the primary object of designing the feeding mechanism as illustrated is to maintain this proper bristle position while being applied to the grooves of the hub.

A special guide, comprising a semi-circular rod 34 prevents the bristles having been applied to the hub from getting into the path of the bristles being applied to the groove. This guide begins at 34A ending up at 34B being supported by the feeding table as best illustrated in Figure 4. The bristles are applied to the top of the surface of the belt at the point 33 in the desired amount to wind the hub with the desired density of bristles.

We consider the principle of feeding the bristles under the binding cable by a pair of belts which are moved from a horizontal plane to a vertical plane maintaining the end of the bristles having been folded down into the grooves by the binding cable opposite to one another until they have been completely bound into place, and the method by which it is possible to control the position of the bristles while being applied to the grooves of the broom drum are the outstanding features of our invention.

We have only illustrated the relative position of the bristles as being applied to the drum and have not attempted to show the complete density of the bristles as would ordinarily be applied. This we have done for the convenience ofillustrating the principle of the feeding mechanism in applying the bristles to the grooves.

What we claim is:

l. A broom making machine comprising means for supporting a broom hub having a spiral groove on its periphery, a drum to receive cord to be wound in the spiral groove of a hub, the drum being spaced from and mounted above the horizontal plane of the means for supporting the broom hub, a pair of guides located below the drum and above the means for supporting the broom hub, said guides being fiat at their forward ends and twisted at an angle of 90 degrees at their rear ends, belts for carrying bristles under a cord being wound on a broom hub, means for guiding the belts against the surfaces of the guides, whereby horizontally disposed bristles passing under said cord and engaged thereby are gradually bent from a horizontal position and radially disposed to said hub and held by the cord in the spiral groove, a feeding table integral with the forward ends of said guides, means for transversely moving the table and the guides as the cord and bristles are applied to said broom hub, and means for retarding the rotation of said drum to place tension on the cord so that the cord will draw broom straw into the spiral groove on said broom hub.

2. A brush making machine comprising a frame, means on the frame for supporting a broom hub having a continuous spherical spiral groove, a cord carrying drum spaced from the hub supporting means, a flat table in-. terposed between the hub supporting means and the drum, the flat table having upstanding sides forming vertical guides, the rear end of the flat table having spaced-apart guides which extend over and beyond the broom hub, said latter guides being gradually twisted from the end portion of the flat surface of the table to a 90 degree angle at their free ends over the broom hub, the space between the guides tapering toward the free ends of the guides, horizontally disposed guide rollers at the forward end of the flat table, vertically disposed rollers at the rear ends of the guides beyond and over the hub supporting means, flat bristle conveying belts trained around the rollers to receive and convey bristles from the flat table under the cord fed from the drum to the groove in the hub, whereby when bristles are placed transversely over the belts on the flat belts passing over the table and between the side guides on the table, they will be carried to the twisted guides and bent degrees and conveyed under the cord and through the space between said twisted guides to the broom hub, and means between the hub supported on the hub supporting means and the drum to transversely move the table at the same speed as the cord and bristles are fed to the groove in the periphery of the hub.

3. A broom making machine as defined in claim 2, wherein the conveyor belts are provided with pins to engage the transversely arranged bristles and convey same between the upstanding sides of the flat table to and under the cord while said bristles are being bent at an angle of 90 degrees between the twisted portions of the guides.

4. A broom making machine as in claim 1 wherein a guide means is mounted adjacent said broom hub and coacting with the spiral groove on said broom hub prevents the broom straws applied to said broom hub from interferring with the broom straws being applied to the groove.

5. A broom making machine as in claim'l wherein the means for transversely moving the table and the guides comprises a bracket mounted on said table intermediate of said guides and a wheel supported by said bracket which is adapted to engage the spiral groove in the broom hub to move the table and guides in transverse relation to said broom hub.

References Cited in the file of this patent UNITED STATES PATENTS Plumeau July 6, 1943