US1045789A - Shock-absorber. - Google Patents

Description

JULIUS F. HERBMANN, 0F INDIANAPOLIS, INDIANA.

SHOCK-ABSORBER masses.

Specification of Letters Patent.

Patented Nov. 26, 1912.

Application filed January 2, 1:512. Serial No. 669,050.

To all whom it may concemfl I Beat known that I, J ULIUS F. HERRMANN, a citizen of the United States, residing.at

Indianapolis, in the county of Marionand State of Ind ana, have invented certain new and useful Improvements in Shockrkbsorbers, of which the following is a specification.

This inventionrelates to shock-absorbers which are particularly applicable to motorcars and similar vehicles; and the object of the invention is to provide simple and efficient means whereby the rate of speed of the rebound of the vehicle-body, when the wheels are passing over abrupt irregularities in the road, is gradually reduced, thereby not only insuring the occupants more ease and comfort in travel, but also reduc-v ing theliability of breakage of the parts of the vehicle.

I accomplish the above object of the invention by means of a shock-absorber illustrated in the accompanying drawings, forming a part hereof, in which- Figure 1 is aside elevation of the shockabsorber attached to the supporting frame and the running-gear of a vehicle, one of thecompanion arms of thelower portion of the shock-absorber being broken away to show the'internal mechanism located within the drum of said absorber. Fig. 2 is a top or Fig. 1. Fig. 4 is a fragmentary. detail perspective view of one end of the main friction-spring. I

Referring to the drawings, the shock-absorber comprises a hollow drum 10 pro-- vided on its outer periphery with an inte' grally formed arm 11, the outer end of which engages-a projecting bolt 12 which is formed integrally with a bearing-plate 13 secured by means of the rivets 15 to the base-rail 14:. The outer peripheral, ends of the drum 10 provide a bearing for the caps 20 and 21, which are provided with annularly extending flanges 22, the latter projecting over a portion of the outer periphery of the drum 10, and the caps 20 and 21 are each provided with an integrally formed .arm which extends to and jointly engages the bolt 26, formed integrally with the clip 21' which secures the several leaves of the spring 28. By this construction the drum 10 is supported at each end by the caps20 and 21, and insures an equal distri bution of the strain throughout the device when'welght is applied to the arnrll. Ac-

cidental displacement of the caps 20 and 21 from the endsof the drum 10 is prevented by means of thestie-bolt 29. Tension is applied to the device, for preventing rapid reboundingof the vehicle-body, by means of an open leaf spring 30, which is arranged concentrically within the drum 10, the expanding tendency of the material comprising said spring forcing said spring outwardly and tightly against the internal surface of said .drum 10. One end of the spring 30 is enlarged, as at 31, and is anchored to the caps 20 and 2lby means of a transverse-pin 32 (see Fig. 3), and the opposite and free end of the spring 30 is preferably bent outwardly and backwardly to form a V-shaped notch 37. A similar notch 37 is formed at the rear of the enlargement 31, these notches being adapted to receive and secure the ends of an additional spring 35, if deemed necessary to as sist the spring 30 in providing more tension. By mountingone end of the spring 30 on the pin 32, which pin is anchored to the caps 20 and 21, such mounting will cause said spring to mov ewith the said caps and arms 25 in a direction opposite to that in which the drum 10 moves. Hence, when the vehi- .said spring 30, so that a corresponding re duction in its tension exerting power against the internal surface of the drum 10 is secured.

The construction of the shock-absorber is such that while permitting a rapid descent of the vehicle-body, this movement will still be somewhat under the influence of the spring 30, and will not he as free as if no tension device were interposed between the vehicle-body andthe spring 28, from the fact that the spring 30 still exerts a slight tension against the drum 10. On the rebound of the vehicle-body the movement between the drum 10 and the caps 20, 21 and the spring 30 is such as to cause the spring to he expanded and, increase its "exertion against thei-nternal surface of the drum 10. This increased tension of the spring 30 Wlll necessarily retard the up Ward movement, or rebound, oi the vehicle body, permitting said body to gradually re turn to its uppermost position as defined by the vehicle-spring 28. In order tc free thatQpor t-ion of the spring gdhetween the pin 32 and the adjacentwall of the drum 10,; I lengthenwthej aperture 3% through which said vpin 32-passes. The aperture 36 isflcut on at line which extends tangentially J forced outward against the ad acent surltace vention; what I to the radius of .thedruin 10, as shown, so that-when the arm 11 moves downward and thearx'ns 25move upward, to reduce the diameter of the spring 80, the end 01" said s rinv car in the enlar ement 31 will he movedto reducethe pressure against th adjacent wall of the drum 10 on account the peculiar arrangement of the apertir 36,- and said spring 30 will he immediat of the drum 1-0 when the'arms 11 and ilfi aremoved in the opposite direction. away from each other. The device is so" simple and'its operation so easily understood that further description isde'emed unnecessary.

Having thus -fully described my said indesire to secure by Letters Patent,.-*i's 1. In an apparatus for cushioning the rmeans passing-transversely through one end.

of said tension device and adapted to engage andbe supported by'and moving with said"caps,to expand "said tension device against said drum.

2.111 an apparatus forcushioning the relative movements: of a vehicle runninggearand' body-frame,- a hollow drurn an i 3 i eaving wi h said caps axis of said drum, arms on said. cape a drum to engage both the frame and ran--- frame, caps surface of said d1.

, d gear. a tension it means psssin through. one end or ii adapted to. engage tension devioean he sn rgiertediley and crease the diameter of? said tension ole 3, in an for cusl'iini'nng gear and body-heme, a hollow drmn, e arranged to move concentrically ahc t ti ning-gear of thevehicle, yieldahle provided a internal surface of mid drum,-v in from one cap te the otls e slot in said ension devi I device when meving an to an s l i)? cushioning relmovements of a vehicle runninggear and body-frame; a hollow drains caps arranged to move concentrically about the ax s or said drum, crimson. said caps and drum to hot-n the irame and running-gear ot the vehidlafyieldable means provided with a slot notches and adapted i to bearagainst the internal surface of said drurimeans extendin from onecap to the other and thren'gh t e'slo't .in said tension device, and an auxiliary tension device arranged within and cooperativelt engaging both. notches in said first tension device- -Iin witness whereof, ,l'have hereunto set my hand. and" seal at llndianapolis, Indiana, this 16th oi December, Done thou sand nine hundred and eleven.

J HERQMANN. [as] "E' itnesses: l l "W; WOERNER, L. B; 'Wonmme.

said running a vehicle runnin

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