US93650A

US93650A - Improved elasiic pitman for stone-channelling- machine

Info

Publication number: US93650A
Authority: US
Publication date: 1869-08-10
Anticipated expiration: 1886-08-10

Description

itinitd gisten @met @Wina GEORGE J. WARDWEEL, OE RUTLAND, VERMONT, AssieNoR To CUTTER COMPANY, OE NEW YORK OITY.

THE STEAM STONE- Letters Patent No. 93,650, dated August 10, 1869. l

*w- IMPROVED ELAS'IIC PITMAN FOR STONE-CHANNELLING- MACINE.

The ISchedule referred to in these Letters Patent and making part Cn.' the Same- To all whom it may concernr Be it known that I, GEORGE J. WARDWELL, of Rutland, in the county of Rutland, and State of Vermont, have invented a new and improved Pitman- Oonnection for Stone-Channelling Gutters; and I do hereby declare that the following is a full, clear, and exact description thereof, reference being had to the accompanying drawings, making part of this specification, in which- Figure l is a side view of my improved pitman-connection applied to the wrist-pin of a crank-wheel.

Figure 2 is an edgeview of the same, also showing the manner of connecting the arms ofthe pitman to a gang of cutters.

Figures 3 and 4 are views of a modilication of the pitman offigs. 1 and 2. Similar letters of reference indicate corresponding parte in the several figures.

In the schedule annexed to my Letters Patent dated on the 18th day of May, 1869, I described an elastic pitman, which consisted of two levers of unequal length pivoted together, with a spring applied between them, which pitman was used for connecting the gang of cut.- ters to a wrist-pinoli the crank-wheel that communicated through said pitman a rectilinear reciprocating motion to the cutters. The spring was arranged below the fulcrun'i of the levers and Wrist-pin, and was conipressed by the `drawing togetherotl the free ends of the levers. p

The nature of this invention consists in a pitmanconnection, composedof two levers of equal length, with the spring or springs arranged above their fulcrum or wrist-pin connection, as will be hereinafter explained.

To enable others skilled in the art to understand my invention, I will describe its construction and operation.

In theaccompanying drawings- A represents a drivingesliaftI which is arranged in a horizontal 'plane across one end of the steam-channelling carriage, and carries ay crank-wheel, B, as described in my Letters Patent, dntcdon the 18th day of May, 1869.

At a suitable point ou the face of the wheel B isa fixed or adjustable wrist-pin, a, which receives upon it two levers, C C, and serves as the vfulcrum for these levers. y

The yoke b or other equivalent device `is used to prevent the levers from slipping ofi' the wrist-pin a.

It will be seen that the levers C C are of equal length, and that they do not `cross one another, but are connected to the wrist-pin a lby ears formed on them; hence, when the longest arms are pressed together, the shortest arms will be separated, and 'vice tersa.

To these levers C C, springs c c are rigidly secured, which rise above the wrist-pin a, and fo'rm elastic extensions of the shortestarms.

These springs c c may be made of a number of straight plates secured together with their outer ends hooked outwardly to receive the tie-loop d, which connects these ends together.

The lower or longest arms of levers C C are con-` nected to a block, g, by means of links h h, which block is used to connect the links to the cutters E. 'Ihe links'are looselyattached to the levers. and also tothe above said pin, have a spring, c, of India rubber, conlined between them, so as to be compressed by the pressing together ofthe longest arn'is.

It will be secu from the above description that I I have provided for applying a spring to the levers above their point oi' connection to the wrist-pin a, consequently I am enabled to make the levers shorter with a given amount of elastic play than would be the case 4if the spring was applied between the longest arms of the levers below the said wrist-pin.

I do not confine myself` to the crank-wheel B, in combination with the improved pitman, as this pitman may be connected to a wrist-pin, a, on a rectilinear reciprocating cross-head, as described in my application for a patent marked A, and bearing even dato with the tiling of this.

Having described my invention,

WhatI claim as new, and desire to secure by Letters Patent, is-

J ointed levers C G, provided with links h h on ltheir longest arms, and .with a spring arranged above their fulcrum, substantially as set forth'and for thc purposes described.

GEO. J. WARDWELL. Witnesses G. CLARK, O. W. SAFFORD.