US2584788A

US2584788A - Chain guard

Info

Publication number: US2584788A
Application number: US9690A
Authority: US
Inventors: Albert J Cich
Original assignee: ELRAC PRESSED METALS Inc
Current assignee: ELRAC PRESSED METALS Inc
Priority date: 1948-02-20
Filing date: 1948-02-20
Publication date: 1952-02-05
Anticipated expiration: 1969-02-05

Description

A. J. CICH CHAIN GUARD Feb. 5, 1952 Filed Feb. 20, 1948 Patented Feb. 5, 1952 Albert .1. can, Buffalo, N. Y., assignor to Elrae .fressed Metals, Inc., .Buffalo, N. Y.. a. corpora.-

I tion oil Slew .York

AnplicationFebrum-y 20,1948. Serial Na acrio 1 Claim.

This invention relates to, a chain guard .and more particularly to a bracket whereby the guard shield of the chain guard of the driving mechanism of a cycle is mounted on a bar of the cycle frame or the like.

The means which have been employed here tofore for this purpose comprise an undue number of parts which involved unnecessary expense and the same were also of such character that it was difiicult to handle the parts of the Fig. 1 is a fragmentary inner side view of a cycle frame bar and a guard for the chain of a driving mechanism which are adapted to be connected by the bracket embodying this invention, and showing the frame bar arranged at an angle to the horizon.

Fig. 2 is an outer side view of the same, but showing the frame bar in a horizontal position.

Fig. 3 is a cross section taken on line 3-3, Fig. 2.

Fig. 4 is a longitudinal section on an enlarged scale, taken on line 4-4, Fig. 3.

Fig. 5 is a transverse section taken on the correspondingly numbered line in Fig. 4.

In the following description the same reference number is applied to the same part in the several views of the drawings.

The numeral l0 represents a bar of the cycle frame upon which is mounted the guard shield H which protects the clothing of the rider from the chain of the driving mechanism of the cycle, as in a pedal propelled bicycle. This bar is usually round in cross section and of tubular form and is arranged in various positions in diiierent makes of bicycles, the same being shown in an inclined position in Fig. 1, and in a horizontal position in Figs. 2 and 4.

The guard shield II is usually constructed of sheet metal and in various shapes to conform to the driving mechanism with which it is associated, that shown in Figs. 1, 2 and 3 comprising a a vertical wall having an upper part l2 which is arranged lengthwise of the cycle and substantially horizontal and a front part I3 which curves downwardly from the front end of the upper pa t. a a f ge projec g atera y from the vertical wall and having an. upper straight part I4 arranged. on. the upper edge of the longitudinal part of the guard wall and :a front curved part 1&5 which is arranged on the curved edgeof the frontnart of this wall.

The bracket which embodies this invention. is adjustable so as to permit of mounting guard shieldsv on frame bars which are arranged in different relative positions: and. in the preferred form of this bracket the samejisxconstructed as follows: 7

The numerals I16 and I! represent front and rear vertical hinge cars which are arranged side by side in an overlapping relation lengthwise of the frame bar and guard and are pivotally connected by a horizontal rivet l8 passing transversely through the same so that these ears can be turned vertically relative to one another for adapting the bracket to guards and frame rods which may be arranged in difierent relative positions.

The front hinge ear i6 is provided at its front end with a curved attaching flange I9 which projects laterally therefrom and is secured to the inner side of the curved part l5 of the guard flange by bolts 20 passing through the flange l5 and through longitudinal slots 2| in the ear flange l9 whereby the respective hinge ear may be adjusted angularly on the guard to suit different conditions. The front hinge ear and its flange may be economically made from a single piece of sheet metal.

The rear hinge ear I1 is detachably and adjustably connected with the frame bar In by a clamping devicewhich embodies this invention and is preferably constructed as follows:

This clamping device comprises two clips, one of which has a semi-cylindrical clamping jaw 22 connected with the rear end of the rear hinge ear I! and adapted to engage one side of the frame bar and the other clip having a cylindrical clamping jaw 23 which is adapted to engage with the opposite side of the frame bar and is detachably connected with the jaw 22. The last mentioned jaw is formed integrally with the rear hinge ear I! of the sheet metal.

The preferred means for detachably connecting the two clamping jaws shown in the drawings include an eye 24 projecting outwardly from one end of the clamping jaw 23, an outwardly projects ing lip 25 arranged on the corresponding end of the other Jaw 22 and extending through said eye, two fastening lugs 26 projecting laterally from the other corresponding ends of said jaws, and a clamping screw 2'! connecting said lugs, as best shown in Figs. 3 and 5. By these means the bracket can be quickly connected with the frame bar and also adjusted lengthwise thereon for properly fitting the guard to the chain of the bicycle operating mechanism.

It will be noted that the axis of the rivet i8 which pivotally connects the hinge ears l6, I1 is arranged at right angles or transversely to the longitudinal axis of the cylindrical jaws of the clamping device, thereby producing a very compact structure and still permitting the same to be readily attached to the guard and frame and adjusted into the required position to suit these parts. 7

Owing to the reduction in the number of parts which comprise this bracket the cost of the same is materially reduced and the same can be handled more conveniently than those heretofore employed for this purpose.

I claim:

A chain guard for the drive chain of a cycle having a frame bar adjacent said chain, comprising a sheet metal guard having a curved part adopted to cover a part of said chain, a pair of semicircular sheet metal jaws engageable with opposite sides of said frame bar, means securing said jaws together and in clamping relation with said frame bar, an integral L-shaped ear extending from the curved edge of one of said jaws and projecting radially outwardly from and thence axially parallel with said frame bar, a secand sheet metal ear arranged iniace-to-face relation with said first car, a rivet pivotally connecting said ears and arranged crosswise of said frame bar, a curved sheet metal attaching flange integral with and projecting from one edge of said second ear and fitting against the inner face or said curved part of said guard, said attaching flange being elongated in the direction of its curvature and provided at its opposite ends with slots elongated lengthwise of its curvature, and bolts extending through said slots and said curved part of said guard.

ALBERT J. CICH.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 642,906 Hedgeland Feb. 6, 1900 1,069,160 Meltz Aug. 5, 1913 2,406,029 Nettesheim Aug. 20, 1946 2,492,879 Mueller Dec. 2'7, 1949 FOREIGN PATENTS Number Country Date 451,470 France Apr, 19, 1913 465,202 France Apr. 10, 1914 62,404 Norway Apr. 22, 1940 585,903 Great Britain Feb. 27, 1947