US431251A - Wagon-bolster spring - Google Patents

Description

(No Model.)

' E. CLIFF.

WAGON-BOLSTBR SPRING, No. 431,251. Patented July 1, 1890.

WlTNESSESI I INVENTUB "ATTOFINEYS".

UNITED STATES PATENT OFFICE.

EDVARD CLIFF, OF NYAOK, NEWV YORK.

WAGON-BOLSTER SPRING.

SPECIFICATION forming part of Letters Patent No. 431,251, dated July 1, 1890.

Ap licatio fil d January 24, 1890. Serial No. 337,913- (No model.)

To all whom it may concern.-

Be it known that I, EDWARD CLIFF, of Nyaek, in the county of Rockland, in the State of New York, have invented new and useful Improvements in lVagon-Bolster Springs, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

This invention relates to the class of bolster-springs which are composed of spiral coils mounted on the bolster and supporting the body of the vehicle.

My present invent-ion consists chiefly in the employment of a plurality of spiral coilsprings of unequal lengths secured to elastic supporting-plates, and so distributed over the lengths of said plates as to equalize the resistances at opposite ends of the bolster and at the same time cause the shorter coils to be brought into action after the longer coils have been partly compressed, and then assist the latter in carrying the load, thus forming a graduated bolster-spring of superior efficiency and durability.

The invention is fullyillustrated in the an:

neXed drawings, in which Figure 1 is a rear end view of a vehicle minus its wheels and showing my improved graduated bolster-spring applied to said part of the vehicle. Fig. 2 is an enlarged side view of the aforesaid graduated bolster-spring. Fig. 3 is a top plan View of the same. Figs. 4 and 5 are vertical transverse sections, respectively, on lines 5c and y y, in Figs. 2 and 3 and Fig. 6 is a detached top plan View of one of the socket-plates 0r step-plates for one of the end coils.

Similar letters of reference indicate corresponding parts.

A represents the axle; B, the bolster; O O, the stakes, secured to the end portions of the bolster in the usual and well-known manner,

and D denotes the body of the wagon.

Z) Z) Z) I) represent spiral coil springs, which may be either cylindrical or conical shaped, and formed either of round or square or rectangular bars of spring-steel. Said coils are of unequal lengths and are distributed over the length of the bolster B, preferably with the longer coils b I) over the ends of the bolster and with the shorter coils h 1) between the longer coils, as best seen in Fig. 2 of the drawings.

Under the bottoms and over the tops of the aforesaid coils I place elastic bearing-plates a and a of spring-steel, to which I secure the coils by means of socket-plates c c and c 0, attached to the plates a a by either rivets or bolts, and tie-bolts e e passing through the centers of the socket-plates c c, in which the central short coils b b are seated. These socket-plates I preferably form with hollow central hubs, which project downward from the upper plates and upward from the lower plates; and receive the heads and nuts of the tie-bolts, and thus obviate interference of the ends of the bolts with the underlying bolster and superimposed parts. By tightening the nuts on said tie-bolts the central portions of the plates a a are drawn toward each other, so as to bring the socket-plates c c to bear on the ends of the short coils Z) Z). The resistance of the longer coils on the ends of the plates at a causes the latter to be sprunginto bowed shape, the lower bar (0 assuming the shape of an arch, while the upper bar a is drawn into the shape of an inverted arch. In this mannerI obtainabolster-spring in which leaf-springs are combined with coil-springs interposed between said leaf-springs. The socket-plates c c serve to prevent lateral dis placement of the coil-springs.

To guard against displacement of the socket plates 0 c on the bearing-plates a a in. case the bolts or rivets become accidentally loosened, I form the said socket-plates with flanges d cl, which abut against the side edges of the bearing-plates a a.

The socket-plates c c on the ends of the bearing-plates a a, I form with guides f f, which engage the stakes O O at the front and rear sides thereof, and thus serve to maintain the coil-springs in a vertical position.

In order to allow the described bolsterspring to be adjusted to bolsters of different lengths, I form the ends of the bearing-plates a a with longitudinal slots 5 2', through which pass the bolts t t, which attach the socketplates 0 c to the aforesaid bearing-plates. By loosening the bolts 1525 the aforesaid socketplates can be slipped inward or outward on. the plates at a, as may be required to bring them into the requisite position to allow the guides f f to properly engage the stakes C O, and then by tightening said bolts the said socket-plates are retained in their adjusted positions.

My improved bolster-spring can be readily adjusted to the desired tension by tightening or loosening the nuts on the tie-bolts c c.

Having described my invention,what I claim as new, and desire to secure by Letters Patent, 1s

1. A graduated wagon-bolster spring consisting of an arching leaf-spring seated on the bolster, coiled springs mounted on the end portions of said leaf-spring, shorter spiral springs mounted on top of the raised central portion of the aforesaid leaf-spring, and a leaf-spring mounted on top of the aforesaid spiral springs and curved reverse from the bottom leaf spring and tied to the central portion thereof, substantially as set forth.

v2. lhe combination, with a wagon bolster and body, of a plate mounted on the bolster lengthwise thereof, coil-springs of unequal heights distributed over the length of said plate, an elastic plate extending over the row of coil-springs, and tie-bolts passing through the short coils and aforesaid plates, substantially as described and shown.

3. The combination, with the wagon bolster and body, of an elastic plate mounted 011 the bolster lengthwise thereof, coil springs mounted on the end portions of said plate, shorter coil-springs mounted on the central portion of said plate, an elastic plate extending over the row of coil-springs, and tie-bolts drawing the central portions of the aforesaid plates against the'ends of the central coilsprings, as set forth.

4. A wagon-bolster spring composed of elastic bearing -plates disposed one above the other and lengthwise of the bolster, socketplates secured to the adjacent sides of said bearing-plates at the central and end portions thereof, coil-springs seated in said socketplates,andtie-boltsdrawingthebearing-plates toward each other, as set forth and shown.

5. A wagon-bolster spring composed of elastic bearing-plates disposed one above the other and lengthwise of the bolster, socketplates secured to the adjacent sides of said bearing-plates at the central and end portions thereof, coil-springs in the soeketaplates on the end portions of the bearing-plates, shorter coil-springs seated in the central socket-plates, and tie-bolts passing through the latter plates and drawing the central portions of the bearing-plates toward each other, substantially as set forth and shown.

6. In combination with the Wagon bolster, two spring-plates disposed one above the other and lengthwise of the bolster, socketplates secured to the adjacent sides of the plates engaging spring-plates at the central and end portions thereof, guides onsaid socket-plates engaging the stakes of the bolster, coil-springs seated in the outer socket-plates, shorter coil-sprin gs seated in the central socket-plates, and tiebolts drawing the central portions of the spring-plates toward each other, substantially as described and shown. I

7 In combination with the wagon bolster and body, two spring-plates disposed one above the other and lengthwise of the bolster, coil-springs interposed between the end portions of said spring-plates, shorter coil-springs interposed between the central portions of said plates, tie-bolts drawing the central portions of the spring-plates toward each other, and nuts on said tie-bolts for adjusting the tension of the coil-springs, substantially as described and shown.

8. In combination with the wagon bolster and body, a plurality of coil-springs distributed over the length of the bolster, plates upon said coil-springs, guides on the outer the stakes of the bolster, a bearing-plate extending over the row of aforesaid plates and supported thereon, and provided with longitudinal slots in its end portions, and bolts passing through said slots and adj ustably connecting the subjacent plates to the bearing-plate, substantially as described and shown. 7

9. In combination with the wagon bolster and body, spring-plates disposed one above the other and lengthwise of the bolster, and provided with longitudinal slots in their end portions, socket-plates adjustably secured to said end portions of the spring-plates by bolts passing through the aforesaid slots, coilsprings seatedin said socket-plates, socketplates secured to the central portions of the spring-plates, shorter coil-springs seated in the latter socket-plates, and tie-bolts connected to the central socket-plates and drawing the central portions of the spring-plates toward each other.

10. In combination with the wagon bolster and body, spring-plates disposed one above the other and lengthwise of the bolster, and provided with longitudinal slots in their end portions, socket-plates adjustably connected to said end portions of the spring-plate by bolts passing through the aforesaid slots, guides on said socket-plates engaging the stakes of the bolster, coil-springsseated in said socket-plates, socket-plates secured to the central portions of the spring-plates, shorter coil-springs seated in the latter socket-plates, tie-bolts connected to the central socketplates, and nuts on said tie-bolts drawing the central portions of the spring-plates toward each other and adjusting the tension of the coil-springs, substantially as described and shown.

11. In combination with the wagon bolster and body, two spring-plates disposed one above the other and lengthwise of the bolster, socket-plates secured to the adjacent sides of the spring-plates at the central and end portions thereof, and provided With flanges engaging the side edges of the spring-plates,

-c0il-springs seated in the outer socket-plates,

shorter coil-springs seated in the inner socket-plates, and tie-bolts drawing the cen- WM. J. GREEN, MELVILLE GREEN.

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