US81952A - Henry f - Google Patents

Description

H. F. SHAW.

LATHE HEAD.

Patented Sept. 8, 1868.

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HENRY F. SHAW, OF WEST ROXBURY, ASSIGNOR TO JAMES A. WOODBURY AND SOLOMON S. GRAY. OF BOSTON, MASSACHUSETTS;

'- Letters Patent No. 81,952, dated September 8,1868.

IMPROVEMENT m LATHE-HEADS.

Be it lgnown that I, HENsY F. SHAW, of West Boxbnry, in the county of Norfolk, and State of Massachusetts, have i'nvcnteda new and useful Improvement in Engine-Lathe Head, of which the following is a full, clear, and exact description, reference being had'to the accompanying drawings, makin'ga part of this specification, in which- Figure 1 represents a longitudinal vertical section of an engine-lathe head embodying my invention.

Figure 2 is a transverse vertical section, showing the toothed cylinders in gear.

Figure 3 is a.view of the same, showing the cylinders out of gear with each other. V

Figure 4. is a view of the device used for changing the relative position of the gear-cylinders.

Figures 5 and 6'are views of a device, which may be applied for taking up the wear of the eccentric-sleeve .or the collar.

The nature of my invention consists in the application to an engine-lathe head of a diflisrential gear, in which the internal and external gears are so arranged and connected that the smaller or external gear may have a movement in reference to a nominally fixed point, and is so combined and arranged with respecttto other parts as not to admit of a rotary movement, but so, nevertheless, as to cause a rotary motion of the larger or internal gear-cylinder on its axis; and by means of a simpleadjustmcnt of an eccentric-sleeve, onwhich the smaller gear-cylinder works, the latter may be thrown into a position eccentric to and in gear withthe larger gear-cylinder, and also.out of connection with the same, thus allowing the larger or internal gear'cylindcr a free rotating motion, while the external gear-cylinder remains stationary.

The velocity of the larger gear-cylinder is regulated the relative number of teeth on the same to those on the smaller or external gear. Y

Referring to the dran'ings A represents the frame, in which is properly jonrnalled the shaft B. Upon the shaft B'is placed the conspulley G, on the face of which, and forming a part of the same, is an eccentric cylinder' or sleeve, d. Upon the fixed eccentric-cylinder d works a movable. eccentric-sleeve or collar, 0, provided on the and towards the cone-' pulley C, with a flat projecting piece, a, which fits within a corresponding recessiiu one side of a circular disk orplate P. The disk P is of a larger diameter than'the face of the cone-pulley G, and on the side towards thesaid puliey is attached a fiat spring, S, provided with a pin, 0, which is made to'engage inone of two holes placed on opposite sides of the centre of the inner face of the cone pullcy C, for a. purpose hereinafter describ d The spring S projects above the edge of the disk P, so as to allow it to be easily operated. i

E represents the smaller or internal gear-cylinder, and is fitted snugly upon the collar c, hot so as to .allow the latter to rotate freely in the said cylinder. To the gear-cylinder E is attached an arm, F, which extends downwards, and, at its lower end, is provided with a slot that fits over a pin,f, by which the cylinderqgear is prevented from having a rotary motion; but is allowed an oscillating motion corresponding to the united cocontricity of the sleeves c and cl. V

D represents the larger or internal gear-cylinder, which is made fast to the shaft B, amLrotates yith it;

The sleeves c andd are so arranged that, when their eccentric or thicker portions willboth be on the same side, they will operate on the gear-cylinder. E to throw the latter into connection with the cylinder-gear D, as will appear in figs. 1 and 2, when the shaft B is rotated.

When it is desired to throw the external out of connection with the internal gear, the pinp is Withdrawn from one of the holes by moving the spring S, and the cone-pulley is moved half way round until the, pin drops into the hole there provided, which bringsthe eccentric portions of the-sleeves c and d opposite each other on the shaft B, as shown in fig 3, thus mnking'*the 'gear'sD and E concentric with each other, and disconnecting the gears.

The cylinder-gear E will then remain stationary, and also the gear D, while the pulley G revolves loosely on shaft B.

The sleeve d and collar emey both be bevelled, in order to allow for .wear of the same.

Figs. 5 and 6 represent a device which may be applied to compensate for the weal-of the sleeves,

v To, the sleeve k ai'e attnched three slotted arms, 1;, through which pass screws, m, into the sides oE'the cylindex- Ii, the latter representing the external gear-cylinder E of fig. 1. On the screw m is ,a shoulder, between which and the head is'held the arin n, so that by turning the screws the sleeve It will be moved in or out evenly, as required.

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

1. The combination of the gears D and E, the disk P, "having the spring-pin p and eccentric-sleeve e attached thereto, and the pulley-block 0, provided with the eccentric-sleeve d, alL arranged substantially in the manner and for thepnrpose specified. v

2. The combination of the pulley-block 0, provided with the cam-sleeve d, disk P, and eccentric-collar a, catch S, and gear-wheel E, substantially as and fonthe purpose set forth.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

HENRY F. SHAW.

Witnesses:

' J. H. AnAMs,

L DYER.

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