US75635A - Improvement in eotaey blowees - Google Patents

Description

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vall arranged and operating substantially as and for "the purposes setv forth.

CHARLES W. ISBELIL, OF NEW YORK, N. Y

Letters .Patent No. 75,635, dated March 17, 1868.

IMPROVEMENT IN ROTARY BLOWERS.

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TO' ALL WHOM'IT MAY CONCERN: j

Beit known that I, CHARLES W.ISBLL, of the city, county, and State of New York, haveinvcnted a.

`certain new and useful Improvement on Blowing-Apparatus, of which the following is a full, clear, and exact description, reference being had to the accompanying drawing, forming part of this specification, and in whichv Figure 1 represents an end elevation of a blowing-apparatus constructed according to my improvement.

Figure 2, a vertical transverse section of the same; and

Figure 3, a horizontal section thereof through the line x :c in g. 1.

Like letters indicate corresponding parts throughout the several figures.

This improvement relates to blowing-apparatus of the character described in Letters Patent ofthe United States (Nd-44,809) issued to W. I?. Mackensie,.of Jersey City, in the county of Hudson, and `State of New JerT scy, and bearing date the 25th day of October, 1864; Y'and the nature of my invention consists 'in a novel 'inode of hanging the shaft, with or around which the vanos work, as au axis and support relatively thereto of the eccentric-drum, that, in being driven, gives to the vanes their respective actions, and whereby friction is reduced, by securing to the drum bearings of a central or small `diameter within the circle which encompassesthe vanes shaft, and every facility obtained for lubricating from `the outside both shafts or bearings.

Referring to the accompanying drawing, A is the frame ofthe apparatus'. B B are the fans or vanos supported by the axle or shaft C, to which'the oncef said fansor vanes B may be rigidly attached by a fast sleeve, b, so as to revolve with the said shaft, or so as to give motion thereto, while the other vane, B', works freely thereon by means of a loose sleeve, b. In case of more than two vanes, also, all excepting the one should turn loosely Von the shaft C in order that they may adapt themselves to the continuous change of angle which they assume in their passage through the drum D, as the latter, which serves to drive them, is rotated, say, 4by a pulley, E, said drum being represented as turning loosely on Yfixed shafts or gudgeons, I". These shafts F are shown as carried by plates G, one at either end, and made vertically adjustableto meet sagging or wear of the vanos in their cylinder II, by set-screws c, said plates being attachments tothe frame A, but adjust-able up and down thereon on slackening screw-bolts, d, which hold `them to the frame and fit through oblong slots in the plates G. I is what may be termed the cylindrical packing through `which the vanes pass in .their intersection of the'drum.` is the air-inlet or opening to the cylinder, and K the discharge-spout, or outlet.

The vanes shaft C turns in and is supported at either end by cranks or projections L, made fast to the inner ends of the shafts or gudgeons F, by which means the shaft C need not pass through the outer ends of the drum, thereby admitting of thclatter having arms or perforated end-plates, e, from central bosses,f, which form the drum-bearings on the shafts F. lThis mode of supporting the drum, as compared with bearings to it outside of the shaftC, materially reduces friction,`while every facility is afforded for lubricating both the revolving shaft C and drum-bearings. v j

In other respects the action of the blower is or may be the same als that described in Letters Patent hereinbefore referred to, and it may be applied to the same or any suitable puiposes, the eccentric position of the drinn D', relatively to the cylinder II, causing the vanos to gradually project beyond the circumference of the drum, and then to gradually recede, so as to-conform accurately tothe air-space of the cylinder, and to conduct the whole body of air therein to and dischargcit from the spout or outlet of the blower.

It may 'here be advisable to mention, in conclusion, that 'this my improvement has no reference4 to a iixcd arrangement of the shaft C, which is so objectionable on account of wear to the boxes of the vanes, and didiculty attending the lubrication of such, while, by allowing-the shaft C to rotate, the wearis transferred to the outside bearings of said shaft, and the loose vane or vanes thereon only have a small turning or oscillating movement on the same, incidental to alteration in angle of said vane or vancs.

what I claim as my invention, and desire to secure by Letters Patent, is-

The revolving shaft C, having one of the vanos B rigidly attached and the others loose thereon, and supported in journals in the arms L of the stationary shafts F, in combination with the drum D and cylinder H,

CHAS. W. ISBELL.

-Wi-tnesses: i,

J. W. Coeurs, Geo. W. REED.

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