US757480A - Band or strap brake. - Google Patents

Description

PATENTED APR. 19, 1904.

P. '0. MIDDLETON & w. s. H. SMITH. BAND 0B. STRAP BRAKE.

APPLICATION FILED MAY 8,.1903. N0 MODEL. 2 SHEETSSHBET 1.

WITNEEJSDES I INVE'N'I-CRS ,Q '2 22% 2E.::5;

No. 757,480. PATENTED APR. 19; 1904."

VP. 0. MIDDLETON & W. s, H. SMITH.

BAND 0R STRAP BRAKE.

APPLIOATIOR FILED HAYB/IQOS. l

2 SHEETS-SHEET 2.

no MODEL.

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UNITED STATES Patented April 19, 1904;

PATENT OFFICE.

PETER CHARLES MIDDLETON AND WILLIAM S. H.- SMITH, OF CROYDON,

ENGLAND.

BAND OR STRAP: BRAKE.

SPECIFICATION forming part of Letters Patent No 757,480, dated April 19, 1904.

I Application filed May 8,1903. $erial No.156,284. (No model.)

road-vehicles, and has for its object to provide means whereby band-brakes are caused to act equally well in'either direction of revolution of the brakedrumth at is to say, backward or forward.

In the accompanying drawings, Figure 1 is a sectional elevation of a dou ble-action brake. Fig. 2 is a modification. Fig. 3 is a diagrammatic elevation illustrating the application of our invention onto a brougham. Fig. 4: is a detail modification.

Referring to Figs. 1 and 2, a Z) are a pair of levers which are pivoted in any suitable manner to the framework or other part of thestructure, as hereinafter described. .The levers a Z) are each formed with an arm a b and an arm a 5 respectively, the arms a 6 being connected to the crossed ends of the brake band or strap 0, which encircles the brake-drum d, and the arms a 5 being connected to the tensioning rod, chain, wire, or other operating-connector. In their normal positions of brake-off the arms a 5' abut against a stop-piece e or other abutment attached to or integral with the'fixed attachment device in such a manner that one or the other of said arms a 6 serves as-the fixed end of the brake band or strap.

In Fig. 1 the levers a b are pivoted at a 6 respectively, at opposite sides of a clip attachment f, which is fixed to a transverse tube 9, which forms part of the usual tubular frame of motor-vehicles.

In Fig. 2 the levers are pivoted upon a common center-viz., a stud or pin it, fixed to or integral with the attachment device j, which is shown fixed to a longitudinal tube of the frame. It will be understood that the pivot or pivots of the levers may be otherwise attached to the vehicle or structure, and the respective lengths of the arms may be varied according to circumstances.

The connectors which communicate. the motion of the usual operating-pedal or hand-lever to the brake-lever are adjustably connected to the arms a 6 Preferably the connece tors are so connected to the foot or hand lever that the motion thereof applies the band to the drum, and that according to the direction of rotation of the drum the correspond- -ing lever is forced against its stop, as before described, by the frictional pull of the handbrake. In order to render such action of the brake in either direction self-adapting and controllable from one foot or hand lever, a rocking yoke i, Fig. 3, is interposed between the lever is and the brake-levers a 5, said yoke being adapted to rock about a pivot 2", which is connected to the lever is by theconnector Z. As shown in Fig. 3,-the yoke is connected at its ends to the levers a f) by connectors m and is suitably supported by a link a, pivoted to the carriage at a and to the yoke at 2". The end of the connector Z is fitted with a suitable bifurcatedend Z, between the legs of which the yoke t' is free to move. Thus if the carriage is running forward and the brake is applied by the lever 70 the frictional contact of the band 0 upon the drum holds the arm 0; of the lever a rigidly against the stop 49, causing the yoke z to rock, the transmission of the tensioning power being continued by the connector Z and lower connector m to the lever b. If there is a reverse or backward motion of the vehicle, the arm 6' is similarly held against the stop e and the tensioning power is applied by the connector to the lever a.

It will be obvious that any other alternating means may be adopted for connecting the connectors m with the operating hand or foot lever. For instance, the yoke i (or its equivalent) may be pivoted-upon the end of said hand or foot lever, or the connectors we may be formed of a continuous and flexible material, such as wire rope or the like, which is looped round a pulley 0, pivoted at the end of the operating-lever, as shown in connection with the foot-lever k in Fig. 4:.

In all cases it is necessary that the connectors m must be connected to the operatinglever, so that either may act independently of the other, depending upon the direction of rotation of the brake-drum.

We claim- 1. A band-brake to act in either direction dependent upon the direction of rotation of the brake-drum, consisting of a pair of levers pivotally fixed and connected to the crossed ends of the brake-band; a fixed stop located between said levers adapted to limit their motion toward one another; and alternative means for transmitting the motion of the operatinglever to one or the other of said levers, as set forth.

2. A band-brake to act in either direction dependent upon the direction of rotation of the brake-drum, consisting of a pair of levers pivotally fixed; a band encircling said drum the ends of which are crossed and connected to the said levers; a fixed stop located between the brake-drum, consisting of a pair of levers" each connected to its respective connector and to the crossed ends of the brake-band; a fixed stop located between said levers to enable either of them to -act as the fixed end of the brake-band; and an alternative device to enable either of the connectors to transmit the motion of the operating-lever to its respective lever, as set forth.

4. The combination with a pair of levers each connected to its respective connector and to the crossed ends of the brake-band, and a fixed stop located between said levers to enable either of them to serve as the fixed end of the brake-band, of a rocking yoke (pivotally and movably mounted) connected at its ends to the said connectors and at its pivot to the operating-connector of the hand or foot lever, substantially as set forth;

In testimony whereof we have hereunto set our hands in presence of the subscribing witnesses.

PETER CHARLES MIDDLETON.

- WILLIAM S. H. SMITH.

Witnesses as to the signature of Peter Charles Middleton:

' JosEPH LAKE,

WALTER J. SKERTEN.

Witnesses as to the signature of William S.

H. Smith:

WALTER J SKERTEN, G-UY C. DOWNING.

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