US617484A - Push-rod - Google Patents

Description

Nu. 6|7,4'84. Patented lan. I0, 1.899. B. HASKELL.

PUSH ROD.

(Application led June 8, 189B.\

(No Model.)

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UNITED STATES PATENT EEICE.

BRODERICK HASKELL, OF GRAND RAPIDS, MICHIGAN.

PUSH-ROD.

SPECIFICATION forming part of Letters Patent No. 617,484, dated January 10, 1899.

Application led June 8, 1898. Serial No. 682,899. (No model.)

T0 a/ZZ whom, it may concern:

Be it known'that I, BRoDERIcK HAsKELL, a citizen of the United States, residing at Grand Rapids, in the county of Kent, State of Michigan, have invented certain new and useful Improvements in Push or Thrust Rods; and I hereby declare the following to be a full, clear, and exact description of the saine, reference being had to the accompanying drawings, in which- Figure lis a view in elevation of an airbrake-cylinder push-rod embodying my in- Y vention. Fig. 2 is a longitudinal section of the push-rod shown in Fig. 1. Fig. 3 is a view of the invention as applied to the lower connection-rod of a brake system, and Fig. 4 is a longitudinal section of t-he connection-rod shown in Fig. 3.

Like symbols refer to like parts wherever they occur.

My invention relates to the construction of that class of railway devices commonly used in connection with a brake system for applying power to the brakes. y

.Push-bars and connection-rods for brake systems, especially where power-brakes are employed, must be so constructed as to ob- `tain the minimum of wear to avoid lost motion, accuracyin length, or distan ce from center of pin-hole to center of pin-hole or between the points of received Iand-applied powervto facilitate construction, adjustment,

and replacement. and strength proportionate to the work to be done; and to obtain these results certain standards have been established by the Master Oar Builders Association, to

which all of said devices must conform. In the production of this class of devices two methods are commonly practiced--casting and forging-the first of which is objectionable, inasmuch as excessive weight of metal is required to obtain the desired strength, and the second for the reason that skilled labor and careful workmanship are required to obtain accurate results as to length, distance between pin-holes, &c.

The object of my present invention is to obtain ya construction of push-bar or thrust-rod which can be accurately and inexpensively made and will possess the maximum of strength with the minimum of weight.

In carrying out my invention I combine with a jaw having a pin-hole or center and with an end plug or with two jaws, each having a pin-hole or center, which jaws may be of cast metal, an interposed tubular connection which may be wrought metal, the castings having grooves into which the wrought metal of the pipe is crimped or forced to unite the parts, and such a construction or its equivalent embodies the main feature of my invention.

tion more fully, so that others skilled in the art to which it appertains may apply the same.

In the drawings, A indicates a jaw or clevis having a center or pin-hole, of which two may be combined with an intermediate tubular sectionl B to constitute a thrust-rod (see Fig. 3) or a single one with an end plug a to constitute an air-brake push-rod, as shown in Figs. l and 2.

I will now proceed to describe my inven-A The jaws A A and end plug a may, if de- .i

. of the parts A ct within the bore of the tubu- Among the advantages incident to a pushi bar or thrust-rod constructed in accordance with myinvention are the facility with which the length of the push-bar or distance between centers of pin-holes of the end pieces of the thrust-rod can be accurately gaged to meet requirements, the dispensing with skilled labor and special machinery in the manufacture, and the reduction in cost and weight for a push-bar of given size and strength.

Inztsmuch sts the construction herein set forth is not particularly desirable for pullrods or rods under tension, though of utility in thrust or push rods where the parts are under compression, wherever herein the Word push-rod is employed it is intended to embrace not only what is technically termed a pusli-rod, but such connection-rods Where the power is applied between centers by a, thrust in contradistinction from pull rod.

Having thus described my invention, what I claim, and desire to secure by Letters Pittent, is-

l. In et pusl1-bar or thrust-rod, the combination with end pieces one or more of which is a jaw or clevis having a center or pin-hole, of an interposed tubular wrought-metal connection crimped to the end pieces, whereby :Lccuracyis obtained in the distances between the points of power, substantially as and for the purposes specified.

2. In a push-bar, the combination with e jaw-section having :t tang provided with :L circumferential groove, and a plug-section having a, tang provided with a circumferential groove, of an intermediate tub ulztr section which receives the tangs of the end sections and is united thereto by crimping the tub ulztr section into the grooves of the end sections, substantially its and for the purposes specified.

In testimony whereof I affix my signature, in presence of two witnesses, this 6th day of June, 1898.

BRODERICK HASKEIJL.

Witnesses:

ERNEST N. WELLER, J. E. ILIURRAY.

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