US110537A - Improvement in adjustable cams - Google Patents

Description

N PETERS. PHOTO-UTHDGRAPHER. WASHINGTON D C @didnt Sieur imnt j effin,

CHARLES F. ANNAN, OF BOSTON, ASSIGNOR TO HIMSELF AND HERBERT S. MERRILL, OF CAMBRIDGE, MASSACHUSETTS.

Leners Peteur No. 110,537, 1aed December 27; 1870.

I IMPROVEMENT IN ADJUSTABLE CAMS.

The Schedulerefen'ed to in these Letters Patent and making part of the same.

To all whom it may concern.

Be it known'that I, CHARLES F. ANNAN, of Bos-A ton, in the county of Suolkand State of Massachw setts, have in vented an Adjustable Cam for producing variable motion at ditferent intervals of time, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing making part of this specification, in which- Figure 1 is a perspective View of my adjustable cam.

Figure 2 is a perspective view of the same reversed.

Figure 3 is a vertical section through lthe center of one portion of my adjustable cam. f

My invention has 'orits object to provide an adjustable cam for imparting to various mechanical devices any variable motion desired; and Y My invention consists in two hubs revolving'upo'n a shalt, and provided with one or more arms, the outer ends of which are provided with enlargements, the

outer sides and surfaces of which contain grooves of the desired form for imparting to the object or device the particular motion required. v

To enable others skilled inthe'art toun'deistand and use my invention, I will proceed to describegthe manner i'n which I have carried it ont.

In the said drawing- A is a shaft, upon which are fitted two e from which project arms a b, the outercnds of which are provided with blocks or enlargements, D E, in the outer faces and ends of which are formed grooves, ed e f,'of the. desired shape, and into which -project the rolls or ends of the levers or other devices to b e actuated thereby.

The inner face of each hub is provided with al short boss or projection, g, of lless diameter than its hub, the boss being planed off' truly, so that when one hub is revolvedaround the shaft, the surfaces 5 6 of each hub will snugly coincide and remain in contact with cach other, each surface 5 being truly nished oiI" in a plane at right angles to the axis' of revolution, in ordert-hat when one hub has-been revolvedand secured `in place by a screw, 7,;12'0 alter the distance between the enlargements D E, any two corresponding points of similar grooves will still vcontinue to remain in the common plane originally given them, and the end of the device to be actuated after having been acted on by'or passed out ofthe groove in one' enlargement, D, will Abe left in the proper position to be takenv up and actuated by the corresponding groove ilnthe otherenlargement E, thereby insuring the to produce any given resnlt,snch as feeding, holding or releasing, striking or cutting, or other operation or otl'ce required in machines of different descriptions. -By providing one or more grooves, c or d, of the samel or different .forms in the outer face of each enlargement D E, and one or more grooves, e orf, in

each of its ends, or in their under sides where their arms join them, I am enabled to provide a ready means of securing any number of similar or variable `motions at different intervals of time.

When it is desired to change the direction of' any particular motion, that is to say, to throw the device operated by the cam from right to lcft, or from one side v to another, it is simplynecessary to unclamp the screw' 7 and revolve the hub C until its enlargement E is revolved around so as to come in contact withthe opposite side of the'A enlargement D, when the. posit-ion of the several portions of the variousV l grooves, c l e f, will be changed with respect to each other, (see igs. 1 and 2.)

the distance between which may be varied, substantially as and for the purpose set forth.

Witness my hand this 26th day of November, A.

D. 1870. CHS. F. ANNAN..

Witnesses:

N. W. STEARNS, W. J. CAMBRIDGE.

Images