US102704A - Improvement in smiths bellows - Google Patents

Description

waited, tattt parte entre.

Leners Parent Nol 102,704, ma May 3, 1870.

Y IMPROVEMENT IN SMITHS BELLOWS.

The Schedule referred to in these Letters Patent and making part o the same.

l', GEORGE H. PEEK, ot' VLast (Hamburg, in the county of Erie and State of New York, have invented 'an Improvement in the Means for Actuating Smiths Bellows, of which the following is a specification.

My invention relates to the ordinary smiths bellows, which are supported at the center, and divided into two compartments, with weighted and movable upper and lower aps, the bellows being operated by elevating the lower Hap, which forces the air into the upper compartment, which, as it distends, raises the upper ap or top thereof. AIn order to. raise .the lower tlap with a uniform velocity, a constantly-increasing resistance, due to the partial compression of the air and the distension ci' theexible sidesot' the. bellows, has to he overcome, which requires for the purpose a corresponding increase of power duriig the time it is. cx-

4Acrted in` eecting the movement.

As a uniform movement ofthe ha|nl-lcver is the natural, common, and easiest movement for the operator, and as such movements of the hand-lever, in the common arrangements for actuating'bellows by hand, produces a uniform movement of the lower flap of the bellows, and as this requires an extra exertion of power during the latter part of the movement to overcome the extra resistance, therefore, it becomes a matter of' importance to construct and arrange the means employed in working thc bellows so as to obv-iat'e thc necessity'of this increased exertion and strainonrthe partof the operator.

My invention, which is designed to accomplish this 'object,consists in the combination, with the lower'liap of the bellows, of two levers, connected together/by a [sliding jointor shifting point ot' contact, so that the length of one of thcarms thus united will increase and decrease with the vmove-ment of the levers, whereby the increased resistance or weight of the lower tlap,- during the latter portion ot' its upward movement, will be overcome, not by increasing the power or the velocity of the same, but by compelling it t0 travel through a greater space in moving the weight a .given distance. than is required to move it the same distance during the former part of its movement.

In the accompanying drawings- Figure I represents an elevation of my improved arrangement for actuating the bellows.

Figure II is an elevation at rightangles to Fig; I.

A is the upper and A the lower flap of the bellows. BU, two levers, each pivoted to sides of the up- Q' rights or standards D, and having their adjacent arms united by a pin in the end ot the arm Al), fittting in a' slot, c, in the end of the arm c.

The power may be applied directly to the arm b of lever B, or through the intervention of a rod, e, connecting with a hand-lever, F, as shown in the drawings.

The arm c2 of lever (l connects with the lower flap Af of the bellows, whichI forms the weight to be raised. The parts are represented in the drawing in the position in which they are at the commencement of the upward movement ofthe flap A', the point of contact ot' the levers B C being in line, or nearly so, with lthe fnlcrathereof, when the length of the arm c, which is measured by the distance between the fulcrnnl ot' C and the pin or point oll contact ot' the levers, is the shortest. As the flap is being elevated, this` distance and length of' arm b gradually increases till the end of the movement, when its length will be greatest, the

point of contact having changed to near the end ofthe slot c', as represented in dotted lines.

lVi'th ther levers B C constructed and operating as above described, it is evdentthat a given power applied to the hand-lever F will cause the latter to travel with anniform', or nearly uniform, velocitythroughoutl the whole of its sweep, the compensation for the increased resistance opposed `by the bellows being made by the increase in the length of the arm c, and the consequentdecrease in the velocity of the weight or` 1t is not alleged that a new bellows, nor a new; crank-connection, has been invented, 'but a newly orl ganized machine has been made by the combination of hand-lever with the intermediate connections and the bellows; and

I therefore claim as my invention- The smiths bellows and its operating hand-lever F, and theintermediate levers B O, constructed, arranged, and operating substantially as and for the purpose hereinbefore set forth.

GEORGE H. PEEK. Witnesses W. H. FonBUsH, JNO. J. Bouman.

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