USRE11129E - aistrell - Google Patents

Description

3 Sheets-Sheet 2.

J. P. H. GASTRELL. MBGHANIGAL MOVEMENT.

Reissued Deo. 2, 1890.

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' 3 Sheets-Sheet 3.

J. 13.11. GASTRELL. MEGHANIGAL MOVEMENT."

. N0.1'1,129. v `ReissudDep.2,1890.

' lUNITED STATES PATENT OFFICE.

MECHANICAL MOVEMENT.

' SPECIFICATION forming part of Ressued Original No. 428,476, dated May 20,

To all whom) it may concern.-

Be it known that I, JAMES P. H. GASTRELL, a subject of the Queen of Great Britain and Ireland, and a resident of Wiesbaden, Nassau, Germany, and domiciled Within the territory of the said Nassau, have invented certain lmprovementsin Mechanical Movements, of Vwhich the following is a specification The object of my invention is to construct To an improved mechanical device in which the extremities of a lever or arm swinging on a center will describe a straight line and not a curve.

My invention is especially applicable to T 5 scale-beams, pumps, cranes, piano-key mechanism, treadles, and other devices in which a straight-line action of pull is desirable or essential.

In the accompanying drawings, Figure l is 2o a side view showin-g my invention as applied to scale-beams or other walking-beams- Fig. 2 is a plan view ot' Fig. l. Fig. 3 is a plan view of a modification of'Fg. 2. Fig. 4 is a modified form of Fig. l. Fig. 5 is a plan of 2 5 Fig. 4. Fig. 6 is another modification showing the application of the movement to a pump. Fig. 7 is a plan view of Fig. 6. Fig. Sis a side view showing the application of my improved movement, by which two move- 3o ments are produced in a straight line, one at right anglesto the other. Fig. 9 is a modified form of the device shown in Fig. S, the angles in this case being changed. Fig. l() is a side p view showing the mechanism so constructed 3 5 that two horizontal movements in opposite directions are produced by a single vertical movement; and Fig. ll is a View of av single set of links on one arm of a lever.

Referring to Figs. l and 2 in the 'first in- 4o stance,I have shown a lever having two equal arms, pivoted at F to a base of any suitable construction. .These two arms terminate, respectively, at E and E2. L and L2 are the pivots on the base, to which are connected the long links described hereinafter. Pivoted to the arms of the lever at E are two links E', A, and CE. These links are pivoted at A and C, respectively, to links AB and BC, which are pivoted together at the point B. A 5o long link AL is pivoted at L to the base and to the links above described at A, and a long Letters Patent No. 11,129, dated December 2, 1890. 1890. Application for reissue filed October 20,1890. Serial No. 36 8,719.

link OL is pivoted at L and to the links at C. This series ot' links forms one-halt' ot' the lever, and it the point B were moved it would describe a straight line, as shown by dotted lines in Fig. l.' The opposite arm of the lever is pivoted at E2 to the links HE2 and. E2D, which in turn are pivoted to thelinks GH and DG at the points H and D. The latter links are pivoted together at the point G. The long link HL2 is pivoted to the links above described at H and to the base at L2, while the long link DL2 is connected to the base at L2 and to thelinks at D. These two sets of links being pivoted, respectively, at L and L2 to the base and pivoted to a lever having its center or fulcrum at F, as soon as one setv of the links moves the opposite set will move in the reverse direction, but the point G will travel in a parallel line with the point B described.

In Fig. 3 the arms of the lever are in line, and the base-section is of a form to accommodate this alignment. In some instances only one setof links maybe used-as, for instance, when it is desirable to have the device operated upon move in a straight line; but it is immaterial whether or not the operating lever move in a circular path-such, for instance, as shown in Fig. 11. The mechanism is especially applicable for use in balances and scales, pumps, key-lever mechanism for type- Writin g machines, valve-gear, treadles, gates, corkscre ws, or nailremovers, and many other devices in which it is advantageous to. have a straight-line lnovement or movements in which a leverlnust necessarily form one of the leading elements.

In Figs. 4 and 5 I have represented the arms of the lever of diiierent lengths, in the present instance two to one, the same idea being carried out in these gures as in Fig. 1, with the exception that one arm of the leveris only one-half the length of the other arm, and the links appertaining thereto are reduced in proportion.

In Figs. 6 and 7 I have shown my invention applied to a hand-pump, in which the handle is reciprocated in a straight line, and thepump-rod consequentlymovedin astraight line, the two arms of the lever in this instance being side byside, and the quadrangu- Walking-beams of engines,

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lar link-works are placed practically side by side and the links composing thejcells are of different length, forming a lever of the second class. The two arms of the lever may be amalgamated where circumstances permit without departing from my invention.

In Fig. 8 I have shown my invention as ap plied to bell-crank mechanism, in which a vertical straight movement is transformed into a horizontal straight movement, as indicated by the arrow, the arms of the lever having its fulcrum at F being at right ngles to each other. s

In Fig. 9 the same idea is carried ont as in Fig. S, with the dierence that the arms of the lever are at a different angle.

In Fig. lOthe devices shown in Figs. l and S are combined, so that by moving the point B downward, as indicated bythe arrow, the point G will be moved in a direction vindicated by its arrow and the point N willbe moved in a direction indicated by its arrow reverse to that of the point G. ism is especially applicable to the key mechf anism of pianos, Where a reverse mot-ion is required and where two parallel motions are necessary, as in the above case,

I claim as my invention-f 1. The combination of the leverhaving its fulcrum at F, one arm of said lever being pivoted to a quadrangular link-work, with long links pivoted to the link-work, as described, and to a base-pivot, substantially as set forth. 2. The combination of a two-armed lever This mechanulcrumed at F to the base, one arm of said lever connected to a quadangular,link-work, with long links connecting saidv link-work with a base-pivot L,the other arm of the said lever being` pivoted to an independent set of quadrangular link-work, said set being connected to a base-pivot L2 by long links, substantially as and for the purpose set forth, and in the manner described.

3. V'Ihe combination of the lever fulcrumed at F, two arms of said lever being at an angle to each other, with quadrangular link-work pivoted to'each arm, with long links pivoted to the link-work and toa base, substantially as described.

4. he combination of the lever fulcrumed at F, the arms of which are 'at an angle to eachother, each arm pivoted to a vcpiadrangular link-work, one of which is continued, forming a second quadrangular set of links, pivotedin turn to one arm of a second lever, the opposite arm of which carries a set of quadrangular links, with long links connecting each set of quadrangular links with the base, in substantially the'manner described, whereby the movement is reversed, substantially as set forth.

In testimony whereof I have signed 'my name to this specification in the presence of two subscribing witnesses.

.I AMES P. II. GASTRELL.

XVitnesse's:

HENRY HovvsoN, JNO. E. PARKER.

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