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Publication numberUS534680 A
Publication typeGrant
Publication dateFeb 26, 1895
Filing dateSep 15, 1893
Publication numberUS 534680 A, US 534680A, US-A-534680, US534680 A, US534680A
InventorsFrank H. Bolte
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 534680 A
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Description  (OCR text may contain errors)

(N'o Model.)4 v u P. H. BOLTE.

' BICYGLE..v No. 534,680. Patented Feb. 26,' 1895.v




SPECIFICATION forming part of Letters Patent No. 534,680, dated February 26,1 895.

Application tiled September 15,1893. Serial No. 485,578. (No model.)

To @ZZ whom, it may concern:

Be it known that I, FRANK H. BCLTE, a citizen of the United States, and a resident of Milwaukee, in the county of Milwaukee, and in the State of Wisconsin, have invented certain new and useful Improvements in Bicying is a full, clear, and exact description thereof.

My invention has for its object to lessen weight without diminishing strength in the construction of safety bicycles, said invention consisting in certain peculiarities of construction and combination of parts hereinafter specified with reference to the accompanying drawings and subsequently claimed.

In the drawings: Figure 1 represents my improvements in side elevation; Fig. 2, a horizontal section on line 2-2 of the preceding 2o igure; Fig. 3, an inner side View of an axlehanger constructed according to my invention, and Fig. 4, a transverse section taken on line 4-4 of Fig. 2.

Referring by letter to the drawings, A rep-V resents one of a pair of hangers for the rear axle of a bicycle. One of the objects of my invent-ion being to lessen weight, I make each hanger from a flat' steel blank of suitable thickness operated upon by shaping dies.

Each hanger has the usual longitudinal slot b or other suitable axle-openingand divergent tube-engaging prongs c, d, these prongs being preferably of semi circular contour in cross-section, whereby I obtain a large amount of brazing surface proportionate to a small diameter of tubing, it being preferable to have the offsets, resultant from the swaging operation, come upon the outer side of said hanger, as herein shown. Those ends of tubes B, C,

engaged by the prongs c, cZ,-of each wheelhanger are swaged to form sockets that correspond in contour with said prongs and are brazed to the latter, whereby I provide very neat and strong joints, and at the same time I gain space forthe sprocket-wheel that is applied to the rear wheel hub of a chain-drive safety bicycle thus enabling me to employ a shorter axle and have less spread of the frame than is usual in the construction of such vehicles.

cles; and I do hereby declare that the follow I am aware of an axle-hangerin which tubular tube engaging arms are a result of a union of two peculiarly constructed metal plates, and I am also aware of such a hanger in the form of' a forging having projections brazed in hollows of frame-bars, but it is not practical with either of said hangers to -have the inside and outside of their yarms or projections brazed to frame-tubes or bars. I-Ience one of the novel features of my invention consists in having the socket-ends of the frametubes correspond to the contour of hangerprong and face the latter inside and out, as is well illustrated in Figs. 2 and 3.

Each hanger is provided with a lateral stud e for engagement with any one of a succession of sockets (preferably perforations) in an eccentric curvilinear washerxD parallel to the contour of the same, this washer being arranged on an axle E intermediate of said hanger and a set-nut F run on said axle.

The set of the Washers D with relation to the studs e on the hangers regulates the adj us'tment of the axle E in the slotted portions of said hangers, and consequently governs the tension Vof the drive-chain (not shown) and it is preferable to consecutively number the perforations in said washers so as to insure of even adjustment.

Having now fully described my invention,

what I claim as new, and desire to `secure by FRANK II. BOLTE.



Referenced by
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US5025977 *Mar 5, 1990Jun 25, 1991Sandvik Special Metals CorporationBicycle drop-out and method of attachment
US5082303 *Sep 6, 1990Jan 21, 1992Gt Bicycles, Inc. A Calif. CorporationChangeable dropout assembly
US5096215 *Aug 7, 1990Mar 17, 1992Sakae Ringyo Co., Ltd.Fork end of a bicycle
US8007383Dec 21, 2007Aug 30, 2011Shimano, Inc.Low profile rear derailleur
US8012052May 11, 2007Sep 6, 2011Shimano, Inc.Low profile rear derailleur with cable guide
US8025598Oct 24, 2006Sep 27, 2011Shimano, Inc.Low profile rear derailleur with a chain receiving space
US8277346Feb 28, 2006Oct 2, 2012Shimano, Inc.Low profile rear derailleur
EP1829780A1 *Feb 28, 2006Sep 5, 2007Shimano Inc.Derailleur
Cooperative ClassificationB62K25/02