US654411A - Bicycle-brake. - Google Patents

Description

No. 654,4". Patented luly 24, |900. E. C. F. OTTO & E. C. F. UTTU, In.

BICYCLE BRAKE.

(Application :Bled Feb. 24, 1900.)

(No Model.)

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WITNESSES.

EDVARD CHARLES FREDERICK OTTO AND EDl/VARD CHARLES FREDERICK OTTOfJR., OF HONOR OAK, ENGLAND.

falcYcLE-eRAKE.

SPECIFICATION arming part of Letter; Patent ivo. 654,41 1, dated July 24, 1900. Application led February 24, IQO. ASerial No. 6,424. (No model.)

To all whom t mag/concern l the supporting-drum B and the inner pe- Be it known that we, EDWARD CHARLES riphery of thebrake-drum C is the linked FREDERICK OTTO and EDWARD CHARLES strap or chain band A, the one end link or of FREDERICK OTTO, J r., subjects of the Queen which is attached tothe supporting-drum B 55 5 of Great Britain, residing at Honor Oak, inv by means of a radially-arranged projection d2 the county of Surrey, England, have invented on the said link which engages a transverse a new and useful Improvement in Brakes for groove in the drnm, as shown in Fig. 2, and Velocipedes,(forwhichwe have obtained Letthe other end link afo'ifthe saidlinked strap ters Patent in Great Britain, No. 15,503, bearor chain band A is attached to the sprocket- 6o Io ing date the 28th of July, 1899,) of which the wheel Y by means ofa transverse projection following is a full and complete specilication. a3 on the said link which engages a hole or Thisinvention relates to an improved brake slot y in the web y of the sprocket-wheel, as for velocipedes adapted to be pntinto operashown in Fig. 1. VWhenthe pedals of the tion by the action of back-pedaling; and it cycle are driven in a' forward direction, the 65 I5 consists, essentially,` of two concentricallysprocket-wheel Y revolves in the direction arranged drums-the one a revolving one of the arrow, Fig. 2, and its motion is imformed on or iixed tothe hub of the drivingparted to the hub "Xi of the driving-Wheel wheel and the other a fixed one attached to by reason of the `end link a of the strap or the frame-and a linked strap or chain band band A bearing against the other end link a 7o zo one end of which is attached to the revolving ofthe strap orband A, as shown in Fig. 2; but

drum and the other end to the sprocket-wheel, when back 'pressure iseX'erted on the drivingwhich is loosely mounted-on the hub of -the pedals the end link a "ofV the strap or band driving-wheel, the object being to overcome being engaged with the sprocket-wheel moves the defects com monA to brakes ofthe strap-andin the opposite direction to the other end link 75 z 5 drum type. r l Y Y i ct of the strap or band which engages the hub In the accompanying drawir1gs,which illusof the Wheel through the drum B, which trate this invention, Figurel is a broken view causes the linked strap or chain band A to in sectional elevation 5 and Fig. 2 is aview in engage the brake drum TC, which it does, transverse section on line X X, Fig. 1, showowing to the linked formation of the strap or 8o 3o ing onevform myinvention may assume. Figs. drum, gradually a link at a time.

3 and 4. are similar views showing an alterna- In the modification shown by Figs. 3 and 4 tive construction and Figs. 5and Gare broken the supporting-drum B is placed exterior to Views,in side elevation and plan,respectively, the brake-drum C and is fixed to the hub X of the linked strap or chain band. of thedriving-wheel by means of a hanged 85 3 5 Similar letters'refer to similar parts through` locking-rin g V. In this construction the end out the several views. link a of the strap or band A is attached to Referring to Figs. 1 and 2, on the hub X the supporting-drum B by means of a radiof the driving-wheel is screwed and fixed by ally-arranged projection d2 on the said link, alocking-ringaanged drumB, hereinafter which engages a transverse groove in the 9o 4o calledthesupporting-drum, whichis adaptdrum, as shown in Fig.` 4, and the other end ed to circumferentially support the `linked ylink ct of the strap or band is attached to the strap or chain band when not in use. Mountsprocket-Wheel Y by means of a transverse ed loosely on this drum B is the driving 'projection a3 on the said link, which engages sprocket-wheel Y. On the aXleZ of the driva hole or slot y in the web g/,of the sprocket- 95 45 ing-wheel is a drum C, hereinafter called the wheel, as shown in Fig. 3. When the bicycle brake-drum, which is mounted concentricis being driven in a forward direction, the ally with.` the supporting'- drum B and lies motion of the sprocket-wheel Y imparted to within the rim of the sprocket-wheel Y. @This the hub of the driving-wheel by reasonof the drum C'is soconnected tothe frame of the engagement of the linked strap orbandA roo 5o machine that itz'cannot revolve. In the anwith the supporting-drum B, and when back nular space between the outer periphery of pressure is exerted on the driving-pedals the linked strap or drum A is caused to engage the brake-drum C by reason of the link a moving toward the end link ct.

The linked strap or band A consists of a series of links of metal or other suitable material connectedA together by transverse pins or rivets, as shown by Figs. 5 and 6, or so shaped that they engage one another by hooking. When the linked strap or band is i11- tended to act by coming into contact with an internal drum-t'. e., when it would be in a state of compressionthe ends of the links are preferably so shaped that they abut one against the other, as shown, so as to relieve the pins or rivets connecting them of all strain.

Each link of the strap or band is made of the same width, and its operative engaging surface, Whether,y it be the outer or inner'one, is made of the same curvature as the surface of the drum with which it is intended to engage, so as to obtain the greatest possible amount of frictional surface. If increased frictional resistance is required, it may be obtained either by lining the brake-drum with leather or other suitable material or in any other approved manner.

. It will be seen that owing to the link formation of the strap or band it has no tendency to become set or to lose its shape, and being supported it cannot come into accidental contact with the brake-drum when the brake is oft Neither does it, as in this type of brake having spring or elastic straps, absorb a large amount of power to overcome its elasticity when applying it, and, further, it is impossible for the brake to seize when too suddenly applied, owing to the links coming successively into action.

What we claim, and desire to secure by Letters Patent, is

l. In a brake for velocipedes, the combination, with a supportingdrum rigidly connected with the road-wheel, and a non-revoluble brake-drum arranged concentric with the supporting-drum; of adriving-Wheel, and a chain-brake arranged in the space between the said drums and having its ends connected to the said driving -Wheel and supportingdrum respectively, said chain being composed of pivoted links which are curved upon the side next to the brake-drum so as to form a continuous brake-surface of the same curvature as that of the brake-drum, substantially as set forth.

2. In abrake for velocipedes the combination with the hub ot' the driving-Wheel, of a drum mounted concentrically thereon and adapted to support the operating strap or band when the brake is out of action, of a sprocket-wheel mounted loosely on the said drum, of a second drum mounted on the axle of the driving-Wheel concentrically with the first drum and so attached to the frame of the machine that it cannot rotate, and of a strap or band formed of a series of links pivoted together so that their ends abut against one another each link having its operative face. curved to the same radius as the operative face of the drum with which the strap or band engages when the brake is in action, the one end link ot the said strap or band being connected to the drum fixed to the hub of the driving-wheel and the other end link to the sprocket-wheel, as and for the purpose set forth.

3. In a brake for velocipedes the combination with the hub of the driving-Wheel, of a drum mounted concentrically thereon and adapted to su pport the operating strap or band when the brake is out ot' action, of-a sprocket-wheel mounted loosely on the said drum, of a second drum mounted on the axle of the driving-Wheel concentrically with the rst drum and so attached to the frame of the machine that it cannot rotate, and of a strap or band formed'of a series of links pivoted together so that their ends abut against one another each link being of the same width and having its operative face curved to the same radius as the operative face 'of the drum with which the strap or band engages when the brake is in action, the one end link of the said strap or band being connected to the drum fixed to the hub of the driving-wheel and the other end link to the sprocket-Wheel, as and for the purpose set forth.

EDWARD CHARLES FREDERICK OTTO. EDWARD CHARLES FREDERICK OTTO, JB.

Witnesses:

A. KNIGHT lCROAD, W. M. HARRIS.

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