US427449A - Combined belt-shifting and brake apparatus - Google Patents

Description

(No Model.)

J. THOMSON. COMBINED'BELT SHFTING AND BRAKE APPARATUS. No. 427,449. aftented May 6, 1890.

UNITED STATES )PATENT Ormea.

JOI-IN THOMSON, OF BROOKLYN, NEV YORK.

COMBINED BELT-:SHIFTING AND BRAKE APPARATUS...

SPECIFICATION forming part of Letters Patent No. 427,449, dated May 6, 1890.

Application filed March 14, 1890. Serial No. 343,900. (No model.)

To @ZZ whom it may concern:

Be it known that I, JOHN THOMSON, a citizen of the United States, residing at Brookl yn, Kings county, State of New York, have invented certain new and useful Improvements in Combined Belt-Shifting and Brake Apparatus, of which the following is a specification.

This is an invention in apparatus for shifting the belt and stopping the ily-wheel by a single movement of a lever, and is particularly intended for and applicable to printing, stamping, or embossing machinery. The object thereof is to obtain an inexpensive but efflcient, quick, and powerful action with such a construction and disposal of the parts as to be readily adaptable to exist-ing types of machinery and to the various conditions met in practice.

In the drawings, Figures 1 and 2 are respectively side and front elevations of a ilywheel with tight and loose pulleys attached thereto, showing the application of my improvement; and Fig. 3 is atop plan view of the hand-lever and the brake-shoe.

In the apparatus of this description the efficiency and usefulness largely depend upon the convenience for adjustment and the permaneney and durability of the structure. It should be readily adaptable to fly-wheels and pulleys of different diameters turning in -either direction and to the requirements of individual operators.

In the illustration the fly-wheel 95 may be assumed as revolving from the operator, in which instance the pulling' side 96 of the belt is in front; hence it may be shifted or shipped from theopposite or following side. In the two standards 97, each a duplicate of the `other, which maybe directly secured to the :floor or the base of the machine, is mounted a piece of shafting 98. To the backward end of this is secured the belt-shifting fork 99, properly engaging the belt. To the forward end of the shaft is likewise secured the handlever 100. By vibrating the hand-lever acting through the shaft to the fork the belt will be shipped from the tight pulley 101 te the loose pulley 102, er vice versa. From the hub Of the hand-lever ashort arm 103 extends (like a bellcrank) out under the fiy-wheel, theextremity of which is formed to approximate a sphere or ball 104. Upon this ball is mounted a brake-shoe 105, properly adapted thereto by a socket-bearing, half in the lower side of the shoe and half in the cap 10G', secured thereto, as by the screws 107. In the face of the shoe two recesses are formed, into which are snugly forced pieces of semi-elastic material 10S-such as leather, paper, rubber, or wood-but which project above the face of the shoe; hence it will be apparent that when the h and-lever is forced over toward the position 109 the material in the face of the shoe will be brought into contact with the face of the fly-wheel, and that the universal action permitted by the ball-andsocket connection between the shoe and the lever will permit and insure a prompt and automatic adjustment of the contacting surfaces. In applying this apparatus to a machine the workman is not required to make a close adj ustnient. The standards are iirst brought to an approximate position and secured. The handle is then forced over to position 109, which is limited or determined by the impact of the shoe against the face of the iiy-wheel. The belt-shifting fork is next swung on the shaft and secured, as by the set-belt 110, to bring the belt over to the desired extent upon the loose pulley. The handle is then reversed as to position 111, the throw of the belt-shifting fork being determined in this instance by the adjusting-belt 112 in the short arm of the lever, which makes contact upon the face of the standard.

In the fitting of the ball and socket no diffi readily operated by a pedal, as indicated by dotted out-line 114.

Vithout limiting myself to the precise construction of parts shown, I claim- The combination, with the standard and a ICO rocking shaft mounted thereon, of a beitname to this speeioation in the presence of shifter fork and hand-1ever connected to the two subscribing Witnesses. rocking shaft, the hand-lever having a rightv v angled projection, upon the extremity of JOHN THOMSON 5 which is mounted, by means of a universal Vitnesses:

joint,abrakeshoe, substantialiyas described. EDW. K. ANDERTON, In testimony whereof I have signed my JOHN MCKINNON.

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