US100510A

US100510A - Improvement in ratchet and pawl

Info

Publication number: US100510A
Authority: US
Publication date: 1870-03-08
Anticipated expiration: 1887-03-08

Description

tniied iatea JOHN u. DunRAN, OF AURORA, ILLINOIS, AssIGN'oR To HIMSELF ANDWI'I@y 'LIAM LOMBARD, OE BROOKLYN, NEW YORK.

Letters Patent No. 100,510, dated March 8,1870; unter/lated February 26, 18,70. Y

IMPROVEMENT IN RA'rcErET AND PAWL.

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

, To all whom itmayxconcern Be it known that I, J onN H. DUnRAN, of' Aurora, in the county of Kane, and State of'lllinois, have invented a new and improved 'Ratchet and Pawl; and

I4 do hereby declare that the'following is a full, clear, 4

and exactfdescription thereof, which will enable others skilled in vthe art to make and use the same, referencev `beiuglhad to the accompanying-drawing forming part `The object of this invention is to iprevent the end of' apawl from working on the edge of a ratchet# wheel, and from thereby wearing ott' the contiguous surfaces while the pawl slips or works loose, on the ratchet.

The invention consists in providing the pawl with spring clamps, by which itis held laway from the edge vof -t-he ratchet-wheel, tso as not to wear the same, as

hereinafter more fully described.

A, in the drawing, represents a ratchet-wheel, ar-

` `ranged on a yshaft or other part of a suitable mechanism or machinery. A

-Bis apawl, pivoted by a pin, a, to a pulley, C, or other suitable part ofthe machinery or mechanism.

.'lo the sides of the pawl are'secured arms b b, that project toward the ratchelwheel, and tit over the faces of the same, as shown.` These arms have sniieient spring power to press against the. sides or faces ofthe ratchet-wheel. Y i y When the ratchet-wheel is turned in the direction of` the arrowvl it tends to carry the ends of the arms b in the same direct-ion, and swings thereby t-he pawl off its edge, and retains it thus as long as it is turned inthis direction. The end of the pawl will, therefore,

not fit against'the edge of the ratchet-wheel, while the same is free to move, and does not Wear on the edge. As soon, however, as the motion of the ratchet-.wheel is reversed into the direction of the arrow 2, the ends of the arms b are carried in the same direction, and draw thereby the pawl against the edge of the wheel, to prevent further turning of the latter in the z'said direction, as is indicated by red lines in ig. l.

In oase the ratchetwhcel is stationary, and the de vice C carrying the pawl is'revolved, the action is the same. If C is turned in the direction ofthe arrow 3, drawing the pawl back toward its pivot, the arms b will be drawn out, and will keep the pawl away from theedge of the ratchet-wheel as long as C is Vthus turned. Whem however, the' motion is reversed into the vdirection ofthe arrow 4 the pawl will be forced against the ratchet-wheel, and will prevent further. turning in the said direction.

` In some cases,paud when the material is of good quality, one single-arm b may be suiicient to produce the requisite friction on the ratchetewheel for keeping the pawl away from the Same.

This invention can be applied to all kinds of machinery, and will produce a considerable saving in pawls and ratchet-wheels, as-their rapid wearing is prevented.

Having thus described my invention,

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

The combination with a ratchet-wheel and pawl, of the single or double spring clampshown and described.

'lhe above speoication of my invention signed by me' this 9th day of February, i869. l

JOHN H. DU'RRAN.

Vli'tuesses:4

JAMEs- D. FOX, J. E. BAYLES.