US1630719A - Street-cleaning machine - Google Patents

Description

i 1,630,719 y 31 1927' SCHROEDER STREET CLEANING MACHINE Original Filed March 4, 1924 WITNESS I INVENTOR,

oww/d -34 ATTORNEY.

Patented May 31, 1927.

UITED STATES ALBERT SGHROEDER, OF PIQUA, OHIO.

STREET-CLEANING MACHINE.

Original application filed. March 4, 1924,

This invention relates to new and usc ful improvements in street cleaning machines, and is a division of my application Serial No. 696,873 filed March lth, 1924;.

it is the principal object of this invention to provide in a street cleaning machine, imirersal means for operating the brooms at an oblique angle and for permitting their easy removal for cleaning and repair.

.in the accompanying drawings, Figure l is a plan view of the broon'i assembly. l igure 2 is a side View of one of the broom discs. Figure 3 is a longitudinal, sectional view taken through the sprocket and universal means for driving the broom'discs. 11 i gure s. is an end View 01. the same, with the polygonal shalt shown in section And Figure 5 is a longitudinal, sectional view taken through the outerend of the universal driving means end the bearing" therefor.

ic'ierring to the accompanying drawings, the numeral 1 designates a broom assembly housing which is quadrilateral in lon -itudinal section and which has, rhomboiclal sweeping opening Projecting inwardly 'lfrom the housingl is an arm 3 whose outer end is forked and boredto fit a jack shaft t for sliding movement thereon. Fitted on the shaft l within the forkedportion ot' the arm 3, i a sprocket wheel 5 whose hub portion (5 carries a radial pin '7 which is free to move through a longitudinal slot 8 formed in the tubular shaft 1. The sprocket wheel 5 is thus tree to slide on the shaft 1 while it is rotated by the latter to drive, through a sprocket chain 9, a sprocket wheel 10 mounted in a bearing 11 secured to the housing 1 just beyond the arm (See Figures 1 and At its inner end the jack shaft 4: is mounted in a bearing 12 secured to atransverse support 13. Secured to the support 13 a short distance beyond the bearing 12 are two bearings 14, 14; for a dead shaft 15. (See Figure Slidable along the shaft 15 is the outer cylindrical end 16 of an arm 17 that projects inwardly from the outer part of the housing 1. Surrounding the dead shaft 15 between the end 16 of the arm 17 and the inner bearing 14:, is a helical spring 18, In the event the housing 1 is crowded against the curb, it will be forced inwardly by the latter against the compression of the spring 18, since the arm 17 of said housing is free to slide onthe dead of the housing 1..

1 (See Figure 1.)

Serial No. 696,873. Divided and this application filed April 16, 1925. Serial No. 23,488.

shaft 15 and the arm 3 of it is free to slide along the jack shaft s. During this sliding movement of the housing 1 the rotation of the sprocket wheel 5 by the jack shaft l will not be disturbed, since the longitudinal slot 8 in the latter permits a sliding movement of said sprocket wheel along it to continuously drive the sprocket wheel 10 for the purpose of actuating the broom mechanism now to bedescribed. 1

The bearing llis secured to the housing 1 in a position to bring the sprocket wheel 10 at an oblique angle to a shaft 19 that passes through the center of the sweeping opening 52 to a bearing 20 secured to the opposite side A (See Figure 1.) The shaft 19, which is preferably polygonal in cross section, is connected to the sprocket wheel 10 by the followinguniversal means to accon'nnodate its inclination to the latter. Referring to Figures 1 and 3, the numeral 21 designates a driving clutch member having a hub portion 22 which is received by a central recess 23 in the inner face of the sprocket wheel 10. Although it may be of any other suitable shape in cross section, the recess 23 in this instance is made polygonal to receive, tor the purpose of driving it, the

polygonal hub portion 22 of the member 21.

Formed in the central portion of the member 21, which is of disc shape, is a polygonal hole 24 to conform to the. shape of the shaft 19 and a little larger than the latter. It the shaft should have another "form in cross section, the hole 2-1 would then have that form. Provided in the member 21 near its perimeter, are equally-spaced holes 25 that are preferably four in number to re ceive the ends of an equal number of rods 26 which surround the shaft 19. At their outer ends these rods are received by holes 27 in a disc member 28 similar to the member 21. (See Figures 3 and The holes 25 and 2'? are slightly larger than the rods 26 to permit them to have a certain angular movement within the holes. Like the member 21, the disc member 28 has formed in its central portion a polygonal hole 29 to receive the outer end of the shaft 19, than which it is larger to allow said shaft to have an angular movement within it. (See Figure 5.)

The disc member 28 has a hollow hub portion 30 into which the outer endot the shaft 19 projects, and which is received by an annular boss portion 31 on the bearing plate 20 that is secured to the casing l by screws 32. (See Figures 1 and 5.) j

Mounted on the shaft 19 beyond, and substantially parallel with, the disc member 28, are broom discs Referring to Figures 1 and 2, each disc 33 is provided around its periphery with a number of equally spaced receptacles 34; for broom bobs 35. Any number of broom discs maybe mounted on the shaft 19, and each one has afcentral hole 36 through which the shaft projects. Near the hole 36 in each disc, and

equally spacedaround it, are holes 3T to receive the rods E26. Each hole 36 is slightly larger than the shaft 19, and the holes 37 are larger than the rods 26 to accommodate the inclination of those members to the broom discs. Furthermore, there is an odd number of receptacles and an even number of rod reccivingholes 37, the broom bobs 35 may bestaggered to form the desired spirals. When the broom bobs 35 are rotated by the sprocket wheel 10 through the universal means hereinbefore described, they will sweep the dirt to the center of the street or road.

There may be any number ol broom discs 33 mounted on the shaft 15) to provide a broom width that willrlean the desired swath. j. Great flexibility is obtained by splitting up the brooms, with the result that depressions in the street will be swept clean by them. The broom discs may also be easily taken out of the machine byremoving the end bearings-and the squared shafts.

The angulardriving connection which I i provide for the broom discsis simpler than a universal joint and requires less power Having described my invention,

1. In a device of the type described, a

so that.

for its ope 'ation. This driving connection is strong and flexible, and does not take up much space.

I claim:

housing, adriving men'lber therein formed with a central polygonal hole, a polygonal shaft which at one end projects at an oh lique angle into said hole, a member within said housing out of alignment with said driving member and formed with a central hole into which the other end of said shaft projects at an oblique angle, the driving member and the second member formed with holes around their central ones, rods received at an oblique angle by the holes in said members that surround the shaft re ceiving holes, and brushing means mounted on said rods and shaft for the pur iose specified 2.111 a device of the type described, a housing, a driving member therein torined with a central polygonal hole, a polygonal shaft which at one end projectsat an obliquc angle into said hole, a member within said housing out of alignment with said driving member and formed with a central hole into which the other end ofsaid shaft projects at an oblique angle, the driving member and the second member formed with holes around their central ones, rods received atan oblique angle by the holes in said members that surround the shaft receiving ones, and broom carrying discs formed with holes to lit on said shaft and rods for rotation thereby at an oblique angle to them; i a

In testimony whereof I have hereunto set my hand this 11th day of A ril, 1925. v ALBERT S HROEDER.

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