USRE6659E - Improvement in street-sweeping machines - Google Patents

Description

2 Sheets--Sheet1. .I. EDSON.

Street-Sweeping Machine.

No. 6,659. RissuedSept.28,1875.

-mTNESJ'ES: I [NVENTORI 4% W? I 4 r 2 Sheets-.-Sheet 2.

Linson'. Strut-Sweeping Machine.

[1v VEN TOR Reissued S ept. 28-,1875.

6 H 6., m) N m UN TED- STATES JACOB nnson, or nosronnassaonnsnrrs.

PATENT OFFICE.-

BEST AVAILABLE CQPY IMPROVEMENT IN STREETSWEEPING MACHINES.

' Specification forming part of Letters Patent No. 159,025, dated January 26, 1875; reissue No. 6,659, dated September 28, 1875; application filed August 28, 1875.

DIv'IsIoN B.

To all whom it may concern: 7 1 a Be it known that I, JACOB EDsoN, of Boston, in the county of Sufiolk and State of Massachusetts, have invented certain new anduses ful'lmprovements. in Street SweepingMa panying drawings, and to the letters of reference marked thereon,'which form a part of this specification.

My invention relates to improvements in street-sweeping machines; and consists in an improved construction ot'the frame and stays by which therotary brush is supported; also, in an improved lifting and holding device for the brush; also, in an improvement in the manner of attaching and detaching the drivingwheels to and from the driving-shaft; also, in the employment of an adjustable independent dust-guard, that is adjustable independent of the rotary brush.

On the accompanying drawings, Figure 1 represents a ground plan of my improved street-sweeping machine. Fig. 2 represents a cross-section on the line A B, shown in Fig. 1. Fig. 3 represents a longitudinal section of the rotary brush, which section is made on the line C- D, shown in Fig. 1. Fig. 4 represents an enlarged cross-section on the line E F, shown in Fig. 1. Fig. 5 represents an end view of the brush and support, seen from D in Fig. 1; and Fig. 6 represents an enlarged cross-section on the line G H, shown in Fig. 2.

Similar letters refer to similar parts wherever they occur on the diflerent parts of the drawings. a a a" represent the frame of the machine.

b b are the driving-wheels. c is the drivingshaft, provided with the bevel-gear d, that engages into a bevel-gear, e, on the intermediate shaft f, from which a rotary motion is conveyed to the brush-shaft g by means of the endless chain h and suitable chain-pulleys on i the intermediate shaft f and brush-shaft g, as usual. The brush-shaft g is made of wood, 1 and provided in each end with a short shaft or pin, i i, that are madeto revolve, each, in a closed bearing, is k',-as shown in i Fig.3. To the rear of the shaft-a is attached-an armor support,-,-,l, provided in its outer ,end with -a guide-roller,over-which the strap or band m ,is conducted..iETheiextreme lower endzof said strap,or band m isattached to the .bearin g k.

A similar strap or band, n, is attached to the bearing]: in the opposite end of -the brushshaft g. To the shaft a is attached a stand or bracket, 0, through the upper part of whichis inserted a movable pin or shaft, 11, provided with a crank, q, as shown. Between the bearings of the stand 0 the pin or shaft p is made as a pair of cams, m n, each of which is flattened centrally with the axis of the pin 1;, as shown in detail in Fig. 6. The band or strap m is attached to the cam m, and the band or strapn is attached in a similar manner to the cam n, as shown in- Fig. 6. By means of thecrank q, pin 1), cams m n, and the hands or straps m n, attached to the bearings Ia k.of the brush-shaft g, it will readily be seen that the latter can be raised or lowered at pleasure simply by turning the crank q, and when the cams m n are turned to a position, as shown in Fig. 6, corresponding to the position of the brush when raised to its highest position, they will remain in such a position, on account of the strain of the bands or straps m n being in the direction of the center of the pin 1). By turning the crank q in a direction toward the left the brush is instantly lowered.

To the driving-shaft c is hinged an arm, 1',

outside'of the wheel I), 'as shown in Fig. l, in which arm the bearing 70 is secured. To the outer end ofthe movable arm 1' is attached a stay or brace, s, that is hinged in its opposite end t to the shaft or frame-work a, as shown in ,Fi g. 1, by which arrangement great strength is obtained for the support and proper position of the brush-shaft during its operation. The outer end of the frame a is connected to the outer end of the support I by means of a stationary stay or brace, u, as shown in- Fig. 1. 1) represents the dust-guard, movable on a stationary shaft or bar, to. and is provided with a chain or its equivalent, x, by means of which it can be raised and lowered independ entof-the ositlon of-thebrnsh-sheib-es may; be desireb The device for detaching the driving-wheels from the driving shnft is. fully shown in Fig. 4, and is arranged as follows: To the shaft 0 is keyed or attached, in, each end thereof, a. ratchetwheel, 3 as shown. The wheels revolve freely on the shaft, and boys sttached to their hubs 'or spokeseringor'box, min which is hinged a pawl, 1, that is he t incontaet with the teeth of the rotchetw eel y by .menns of-o' suitable spring, 2,115 shown. An'

eccentric com, 3, is located in relation to the.

BEST AVAILABLE co y Heving'thnsi'ihliy described the were, construetion, and operation of my "invention, I wish to secure by Letters Patent, and claim- 1. The combination of the frame or shafts a a" with the support I and stay or brace u,

as and for the purpose described.

2. In combination with the straps or hands m n, the cams or eccentrics m n, as and for @im -1-purpose set' forth; i

3. The com or eccentric 3, in combination with the pawl 1. sprin 2, ratchet-wheel y, the

shaft 0, and the driv ng-nwheelihas and f0] I the purposetset forth.

4. In combination with the rotary brush 4, the independently-adjustable dust-guard c;

as and for the purpose herein set forth anti described.

In testimony tbnt-lclaim theforegoing a! mi invention, I hsve hercunto-set my hanzi th s-21st day of Angnst, 1875.

Witnesses:

JACOB EDSON. Annex Annuals, V

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