US1466950A - Lamellar carriage spring - Google Patents

Description

Sept. 4, 1923.

R. BURGER-WEBER LAMELLAR CARRIAGE SPRING Filed OCT.. 2l. 1922 Fly. j.

Patented Sept. d, H23.

normar BURGER-wanna, or BURG, swrrznan LELLAB CARRIAGE SPRING.

i ,I Application led October 21, 1922. Serial No. 596,159.

To all whom it'may concern.'

Be it known that I, ROBERT BURGER- lVnBnn, a citizen ofthe Republic of Swit in consequence of' certain weather'conditions, for instance through humidity, they oxidize in a comparative y short time once the grease applied to the lamellar leafsprings has dried up. The resulting increased friction between the separate leafsprings is prejiudicial to a proper play of the carriage-spring, so that the shocks imparted to the carriage when in movement, instead of being absorbed by the spring, are necessarily taken up by the carriage trame and thus lvery often cause breakages in the spring. If, therefore, the latter is not frequently taken to pieces and cleaned and greased, damage to the carriage and conse'- quent accidents are sooner or later likely. However, the periodical dismounting of the springs not only places the automobile or other carriage out of temporary use, but

such dismounting is mostly diiicult and causes much waste of time, for which very reasons these labours are as often as not neglected. It has previously been proposed, it is true, to overcome these drawbacks by means of lubricating devices arranged laterally of the carriage-springs and causing the oil or other lubricating means to be forced between the separate leaf-springs. Such devices, however, are totally insufficient, inas much as the lubricating means is more likely to be pressed out at the sides of than `into and between thi@ leaf-springs.

The present invention has for its object to avoid all'the aforementioned disadvantages, the improved carriage-spring comprisinto the grooves and between the separateV leaf-springs.

In the accompanying drawings: Figs. 1 and 2 show alongitudinal and a cross section, respectively, of the carriagespring according to a first construction, .and

modified construction.

Similar parts are designated ,by like references throughout the several views and in the specilication. Referring to Figs. l and 2, the carriage- Figs. 3 and 4 show sectional4 views of a spring comprises sevenleaf-springs l, 2, 3,

4, 5, 6 and 7, of which the lower ones, as usual, are shorter than those above. These leaf springs are held together in the known manner by a'clamp or the like (not illustrated), and secured against displacement, relative one to the other, bya centrally disposed bolt 8 which extends through the whole set of the leaf-springs. rlhis boltl is provided, firstly, with a bore 9 which is closed at the bottom but open at the top; secondly, with a lubricator such as, for instance, a grease-box 13 of which only the lower part is indicated; and thirdly, with slots 10 which correspond approximately with the cross section of the grooves inthe leaf- springs 2, 4 and 6. The

latter have longitudinal grooves 11 therein, these grooves gradually diminishing towards each of the ends of the leaf-spring and forming with lthe base of the above 1ying leaf-spring a channel which communicates with the slots l0 and therefore with the bore 9 of the bolt 8.

lf lubricating means is forced into the bore of the said bolt, it is made to pass through the slots 10 into the channels 11,'

then over the well rounded-off edges of the same in order finally to be pressed between the separate leaf-springs, which, to facilitate the penetration of the oil or other grease,`

may be formed with lateral or oblique smaller grooves. @wing to the friction of the adjacent leaf-springs, caused by the play of the whole carriage-spring during the movement of the carriage, the lubricating grease is enabled to reach even those places which, by the mere pressure under which the grease is forced into the channels, would otherwise be inaccessible. In this way a thorough lubrication of the adjacent faces of the leafsprings is eiiected, and a lasting of thecarriage-spring made possible. The play thereof will not be alected but remains even, al-

ways provided, that the lubrication is not neglected and renewed at regular intervals. Since the leaf- springs 2, 4, and 6 are weakened by the grooves 11, it will be of advantage to neutralize the weakenin b making these leaf-springs somewhat t ic er than those without grooves. The grooves 11 may also, if desired, contain linings, and the latter made to receive and distrlbute the lubricating means.

The modification shown in Figs. 3 and 4 is distinguished from thedevice hereinbefore described merely by a different construction of the bolt receiving the lubricant. The bolt 8a according to this modification, instead of having a central bore, now has two op ositely arranged grooves 12, which at t e t0 communicate with the bore o f an integra screw-threaded part 9a adapted to receive the grease-box 13. The purpose of this con-l struction of the bolt 8El is to minimize as far as possible its weakening, the size of the bolt, relative to that of the spring, being of course limted. v A

In place of the grooves described and shown channels of other form could be provided in the leaf-springs. By the application of my improved carriage-spring, especially on automobiles, the latter are preserved vthe grooves.

to the utmost, the carriage-spring absorbing easily all the shocks and thus Warranting a vided with a longitudinally disposed groove,

of a bolt mounted centrally of the leafsprings and extending therethrough, the said bolt having a bore and slots communicating with the corresponding .grooves in the leafsprings, and means to cause a lubricant to be pressed through the said bore and slots into the grooves.

In the herein-described lamellar carriage-spring, the combination, with a series of leaf-springs of which every other one is thicker than the adjacent leaf-spring and provided with a longitudinally disposed groove diminishing towards either end, of a bolt mounted centrally of and extending through the leaf-springs, the said bolt having a central bore and lateral slots to communicatewith the grooves in the leafsprings, and means to cause a lubricant to be pressed through the said bore and slots into ROB. BURGER-WEBER.

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