US832977A

US832977A - Rope-drive.

Info

Publication number: US832977A
Application number: US28259505A
Authority: US
Inventors: Thomas James
Original assignee: Individual
Current assignee: Individual
Priority date: 1905-10-13
Filing date: 1905-10-13
Publication date: 1906-10-09
Anticipated expiration: 1923-10-09

Description

PATENTED OCT. 9, 1906.

1?. JAMES.. ROPE DRIVE.

APPLICATION II'LED 00T.13, 1905.

2 sums-$53 1.

WITNESSES O T N E V H rn: mmms PETERS cm, wAsHrNnroN. n. cy

PATENTBD OCT. 9, 1906.

2 SHEETS-SHEET 2 INVENTOR V WITNESSES r JE 1n: NORRIS Pnnu ca, WASHINGTON, b. a.

THOMAS JAMES, OF BRADDOOK, PENNSYLVANIA.

ROPE-DRIVE.

Specification of Letters Patent.

latented Oct. 9, 1906.

Application filed October 13 1905. Serial No. 282,595.

To all whom it may concern:

Be it known that I, THOMAS JAMES, of Braddock, Allegheny county, Pennsylvania, have invented a new and useful Improvement in Rope-Drives, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming part of this specification, in which Figure 1 is a plan, and Fig. 2 is a side elevation, of my improved mechanism.

My invention relates to rope-drives in which an endless rope is carried on and is driven by means of sheave-wheels, the rope being used to transmit power at any point between the extreme points of support for the rope. Heretofore it has been the practice with ropedrives of this class to positively drive one of the rope sheaves or drums and to provide a rope-tightening device which carried he other of the rope-sheaves in order to keep the rope at the proper tension, the driving sheave and he sheave on the tightening devices being usually located at the opposite ends of the rope-drive.

My invention is designed to provide improved means by which the rope is driven and is tightened and kept at the desired tension, and it consists in providing a tightening device and applying the rope-driving mechanism so as to be carried on and be movable with th tightening device, .as is hereinafter described and is pointed out in the appended claims.

In the drawings, 2 is the driving sheavewheel of a pair of wheels which are located at any desired distance from one another, (the driven sheave-wheel not being shown,) and 3 is an endless rope which is passed around the sheave-wheels. When the distance between the end sheave-wheels is very great, suitable idler-wheels may be supplied to support and to prevent sagging of the rope.

The driv ng sheave-Wheel 2 is mounted on a shaft 4, which is carried in suitable bearings 5 5, located on a bearing-stand 6. The stand 6 is slidingly mounted on shears or ways 7 7 and is connected by a rod 8 to one arm of a bell-crank 9, which is mounted in fixed bearings 10. The other arm of the bell-crank 9 is provided with a counterweight 11, by which the sheave-wheel 2 is moved to keep the rope 3 at the required tension. Also mounted on the stand 6 is a driving-motor rop 12, which is connected by the pinion 13, through the toothed wheel 14 and pinion 15 on the counter-shaft 16, to the toothed wheel 17, located on the outer end of the driving sheave-wheel shaft 4.

In the operation of the apparatus the motor is started and through the connecting gearing causes the driving-sheave to revolve and drive the rope 3 and through the rope 3 causes any connections to it to be operated. In case the tension on the rope should become too great the outer end of the horizontal arm on the bell-crank will be lifted, lessening the distance between the two wheels and allowing the rope to slip on the sheave and in this way prevent damage to he apparatus.

In order to provide a wearing-surface on the driving sheave-wheels, he wheel is preferably lined with a soft metal, although wood or other material may be used for such linings.

The advantages of my invention will be apparent to those skilled in the art. Instead of having the tightening device and the drivlng mechanism located at widely-separated points they are both on the same end of the By the word rope in the claims I intend to cover any flexible connection.

Variations in the arrangement and location of parts may be made within the scope of my invention.

I claim 1. A rope-driving mechanism having a longitudinally-movable frame, a rope-driving sheave mounted on said frame, a motor also mounted on sa d frame, gearing intermediate the motor and sheave and means for adjusting the frame; substantially as described.

2. A rope-driving mechanism having a longitudinally-movable "frame, a rope-driv ing sheave mounted on sa d frame, a motor also mounted on said frame, gearing intermediate the motor and sheave and a Weight. ,for moving the frame; :ubstantially as described.

In testimony whereof I have hereunto set my hand.

THOMAS JAMES. Witnesses:

JOHN MILLER, H. M. CoRwrN.