1861-12-31 Thomas Green & Willoughby Green - Patent No 3263 - P03
Specification. A.D. 1861.-N° 3263.
T.&W. Green & Mathers' Impts. in Chains for Giving Motion to Chain Wheels, &c.
nature of the said Invention, and in what manner the same is to be per- formed, to be particularly described and ascertained in and by the following statement thereof, that is to say :-
This Invention has for its object improvements in chains for giving motion to chain wheels, and in giving motion to machinery. The first part of the Invention consists in constructing chains used for giving motion to chain wheels with extra links, or what may be called guard links, on each side of the driving links, these extra links are to overlap the edges of the teeth of the chain wheels, and they serve to keep the chain in its place on the wheels. When using a chain constructed in this manner, no flanges are required on the chain wheels.
The second part of the Invention consists in giving motion to machinery by the combined use of a chain and chain wheels and friction surfaces, such as a pulley and band or friction wheels, which wheels may either be plain or grooved. By thus using a chain in combination with friction, the chain works more easily, and yet with the same certainty as before.
And in order that our Invention may be most fully understood, we will proceed to describe the Drawings hereunto annexed.
DESCRIPTION OF THE DRAWINGS.
In Figures 1 and 2 is shewn a plan and side view of a chain for giving motion to chain wheels constructed according to our Invention. In these Figures a, a, are the driving links of the chain which are formed to fit the teeth of the wheels, with which the chain is to work, and are similar to the links of chains used for giving motion to chain wheels heretofore constructed, and 6, 6 are what we call the guard links, placed on each side of the chain. The guard links are kept in their places by the pins c, c which connect together the driving links a, these guard links come on each side of the chain wheel with which the chain is to work, and keep the chain in its place on the wheel. By using a chain, composed as above described, of driving links formed to fit the teeth of the chain wheels, and of guard links on each side of the driving links, the chain wheels will not require to have flanges formed upon them to keep the chain in its place.
Figures 1 and 2 also show a mode of communicating motion from one shaft or axis to another by the combined use of friction surfaces and of a chain and chain wheels. In this Figure the friction surfaces are composed of grooved friction wheels, there being a grooved friction wheel c1 on each of the axes a' and b', and an intermediate grooved wheel d, which works with both the wheels c1; on each of the axes a1 and b1 is also a chain wheel e around which