US157910A

US157910A - Improvement in bellows

Info

Publication number: US157910A
Authority: US
Publication date: 1874-12-22
Anticipated expiration: 1891-12-22

Description

UNITED STATES PATENT QEEIGE.

MICHAEL DovLE, or NEW YORK, N. Y.

IMPROVEMENT IN BELLOWS.

Specification forming part of Letters Patent No. 157,910, dated December 22, 1874; application filed August 24, 1874.

To all whom it may concern:

Be it known that I, MICHAEL DoYLE, of the city, county, and State of New York, have invented certain new and useful Improvements in Bellows, of which the following is a specification, reference being had to the accompanying drawing, in which- Figure l is a perspective view of a bellows embodying my invention. Fig. 2 is a vertical central sectionmof the same.

The bellows in which my invention is comprised is double-acting, in order to maintain' a continuous blast of air. I employ a stationary or fixed center diaphragm, A, with exterior movable plates B G, connected with the center diaphragm or plate by side Walls of leather or other pliable material, D, thus forming a chamber, a, on each side of the center plate. The plates B C are not hinged to the center plate, and do not vibrate on an axis; but they reciprocate bodily toward and away from the center plate.

This arrangement enables me to obtain air-chambers of requisite capacity, and yet economize space, bringing the bellows within a smaller compass than would otherwise be practicable.

The center plate is fixed to a frame, E, and the two movable plates B O are provided on each side with guides b, which move in vertical guide openings or grooves in the fraine, and thus assure the position of the moving parts of the bellows. The upper and lower plates B C also are connected by rods c, or their equivalents, so that the two shall move in unison, their arrangement being such that, when the one chamber, a, is collapsed and contracted, the other chamber, a, will be eX- tended.

Ihe movement of the bellows in the present instance is eected by lever-handle F, pivoted to the frame E, and connected by a link or jointed rod with the upper plate G.

Air is supplied to thelower chamber through iiap-valves d in the plate B. The air-supply of the upper chamber a is, in this instance, through a passage, e, in the center plate A, which is controlled by a iiap-valve,f. The air from both chambers is discharged through a common outlet, g, formed in center partitionplate, with which outlet the chambers communicate through openings h. These openings are controlled by a single disk or puppet valve, i, which plays up and down in an intermediate valve-chamber, j, formed in the plate A between the two openings 11,. This valve, operated by differences in the airpressures in the two chambers a during the movement of the bellows, alternately rises and falls, and thus throws alternately each chamber a into communication with the outlet g.

By means of the above-described construction and arrangement of parts a practically con tinuous and uniform blast will be obtained.

The apparatus is not only effective but cheap, simple, and little liable to get out of order, and it occupies but little space.

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

The combination of the guided exterior plates of the two airchambers ofthe bellows, reciprocating bodily toward and away from the center partition or plate, as described, with the center partition or plate, having air-outlet g and openings h, controlled by the intermediate valve z', as herein shown-and set forth.

In testimony whereof I have hereunto signed my name this 19th day of August, A. l). 1874.

MICHAEL DOYLE. Witnesses:

R. S. HAYWARD, CHARLES E. EDLING.