US556663A

US556663A - Thomas crawford dennison

Info

Publication number: US556663A
Authority: US
Publication date: 1896-03-17
Anticipated expiration: 1913-03-17

Description

(No Model.)

T. G. DENNISOE.

DRIVING BAND. 6 N0. 556,663. P6666666 6666.17, 1896.

*NMw:

; IIUINITE'D STATES "PATENT 'Orrrcn;

THOMAS oanwronnnnumson, or} QAMARU, NEW ZEALAN-T).

DR lVlNGf-BAND.

1i ysrncirxcs'rion forming part of Letters Patent No; 556,663, dated March 17,18 961 Application filed December 13, 1895. Serial No. 572,041. (No model.) Patented in England October 23, 1396,1lo. 19,971.

To all whomiit may concern.-

Be it known that I, THOMAS CRAWFORD DENNISON, a subject of the Queen'of Great Britain, residing at Oamaru, NewZealand,

haye'inventeda' new and useful Improve ment in Driving-Bands, (for which I have obtained Letters Patent in Great Britain, No. 19,971, hearing. date of October 23, 1895,) of which the following is-a specification.

My invention relates to an improvement in belts or bandsfused for driving machinery, and more especially to bands used as substitutes for the pitch-chains now ordinarily used, in combination with suitable corre- 5 and other velocipedesg and theobjects of my invention are to make such driving belts or hands so that they are very light, strong, flexible and durable, while they cannot stretch and are not liable to slip, and are cleaner than. chains, no lubricatingoil being required. I attain these objects by the means illustrated in the accompanying drawings, in whi 2 5' Figure 1 represents part of a driving-band,

showing the method of its construction. Fig. 2 is a transverse section, and Fig. 3 an edge view. .Fig. 4 is a section showingthe band passing round a pulley, and Fig. 5 a trans- 0 verse section .on a larger scale. Similar letters refer to similar parts in diiferent figures. v

I take a sufiicient length of line, strong, metallic wire, preferably steel, such as is well known as piano wire, and I wind this wire'i'n parallel and adjoining coils round a drumjor wheel of the proper diameter, so that the coils for a flat endless ribbons of the required width. and length, andl attach the two ends ofthewire to the coil by soldering or other equivalent means, as illustrated in Fig. 1, where 2) represents one end of the coil bent across and, soldered to the rest of the band a.

the

kept in their proper. position by means of a suitable solder of sufficient flexibility applied to their whole surface or at intervals.

The flexible metallic band, made as described, after having'becn removed from the drum or wheel round which it has been wound, is wound roundwith a strip or strips spending chain-wheels,for driving bicycles The parallel coils of the wire band a are tion.

lVhere vulcanized instead of plain indiarubber is used for the exterior coating, 1 first coat the wire coilwith a thin coating of alu m inum, so that the wire coil may not be injuriously afiected by any sulphur or other injurious ingredients present in the india-rulr her, or the solder used may be of aluminum or a compound of aluminuim'or instead of aluminum other substances unaffected by sulphur may be used.

The india-rubber (Z ismade of such shape in. cross-sectionas to fit in corresponding grooves round thcperipheries of the pulleys, round which the endless band passes, as shown iusection at c, Fig. 4, and such an arrangement forms an excellent substitute for the ordinarynhain wheels and pitch-chains used in cycles, and for other purposes of the like kind.

p of hard canvas c and is finally coated with plain: or vulcanized india-rubber, as shown at d in thcfigures, of suitable thickness and sec- In order to increase the grip, the sides of the M grooves may be made waved or undulating. Bands made according to my invention are extremely light and flexible and at the same Y purposes for which flexible belts or hands are ordinarily used. I

\Vhat I claim as my invention, and desire to secure byL'etters Patent, is

1. An endless driving-band for bicycles and the like, composed of a central core formed.

of a continuous small tempered-steel wire wound in a plurality of coils adjacent to each other, and the ends of said wire bent transversely across the said coils and soldered thereto; a suitable solder interposed between said coils and binding the same together; a continuous strip of canvas wound spirally upon said central core; and a thick coating of india-rubber inclosing the whole, substantially as described.

'2. An endless driving-band for bicycles and the like, composed of a central core formed of a continuous small tempered-steel wire wound in a pluralityof coils adjacent to each other, and the ends of said wire bent trans- 2 55e,ees

versely across the said coils and soldered thereto; a suitable solder interposed between said coils and binding the same together; a continuous strip of canvas wound spirally 5 upon said central core'; and a thick coating of india-rubber inclosing the whole; the said bandbeing of greater cross-section upon its outer circumference than upon its inner cireumference; to fit in a corresponding1y- 1o grooved Wheel and thus insure the greatest friction against the sides of said groove as well as against the bottom thereof, substantially as described.

THOMAS CRAWFORD DENNISON.

Witnesses:

ARTHUR E. EDWARDS, W. E. SYKES.