1858-06-07 James Ferrabee Patent No. 1277 P07

are carriages for receiving the rakes or brushes (as the case may be) and they are jointed to the expanding arms 1, 1, 1.

It will be seen that as the disc k turns in one direction, the arms 7, 1, 7, will project further from the centre of motion, and as the disc turns in the opposite direction the arms will be drawn in. In order, therefore, to alter the diameter of the expanding frame a suitable handle is applied to the worm m, which being turned causes the disc k to turn also.

Figures 11 and 12 are elevations, and Figures 13 and 14 are partial plans, of sweeping machines with an expanding brush. The red circles indicate the pitch lines of the driving wheels.

Figure 15 is an elevation of a sweeping machine, with two brushes revolving in opposite directions.

At Figures 11 and 12, A is the back for receiving the sweepings, forming also the frame of the machine. B is a swivel wheel in an adjusting carriage for supporting and guiding the machine; C is a carrying wheel; a is a part of axle, and D is a part of frame; b is a cog wheel attached to the carrying wheel C and driving the cog wheel c; d is a cog wheel on the same axle as c, and driving the cog wheel e, which is fast on the axle f of the expanding brush E; g, g, are discs grooved or recessed to receive the expanding arms h, h, h. These discs are fast on the hollow axle f; i is a scroll wheel turning on the axle f and held by a set pin; k is a shield in one piece, or two or more pieces, moving on the joint 7, and regulated by a set pin m; and n is a hinged flap in the box a.

When the machine is in motion the brush will revolve in the direction of the arrow, and by its action, governed by the curved shield, the sweepings will be carried round and thrown into the box from the upper side of the brush. The shield being hinged, yields to any unfavorable obstruction. The diameter of the brush may be increased or diminished by turning the scroll wheel i on its axle. On Figure 15, A is the box for receiving the sweepings, and forming also the frame of the machine; B is a carrying wheel; C is a pulley fast on the same axle as B; D, D, are revolving brushes with a pulley on the axis of each. A band is passed partly round the driving pulley C, once round the pulley on the small brush, and partly round the pulley on the large brush, and as the machine is set in motion the brushes revolve in the direction of the arrows, and by their combined action the sweepings are delivered into the box A. Suitable adjustments are provided for regulating the distance of the brushes from each other, and of both of them from the ground.

In conjunction with these brushes an apparatus may be applied and used for sprinkling water before the brushes to lay the dust.