US745643A - Packing for piston-rods. - Google Patents

Description

. I PATENTEDDEG'. 1-, 1903. -M. MONTGOMERY. momma FOR-PISTON RODS.

APPLICATION FILED SEPT. 11 1.903.

H0 MGDEL.

//1Ve/1/0/ I I No.745,643. I Patented December 1, 1903.

UNITED STATES PATENT FFICE.

MARSHALL MONTGOMERY, F PHILADELPHIA, PENNSYLVANIA, AssIGNoR TO HIMSELF AND HENRY s. MONTGOMERY, TRADING As MONTGOMERY BROTHERS, OF PHILADELPHIA, PENNSYLVANIA, A FIRM.

PACKING FOR PlSTON-RODS.

SPECIFICATION forming part of Letters Patent No. 745,643, dated December 1, 1903.

Application filed September 11, 1908. Serial No. 172,758. (No model.) I

To all whom it may concern: bility to adapt it to fit the rod, but has prac- Be it known that I, MARSHALL MONTGOM- tically little or no elasticity. ERY, of the city and county of Philadelphia The upper memberSis composed ofa strand and State of Pennsylvania, have invented an of textile material, D, in which are preferably 5 Improvement in Packing for Piston-Rods, of embedded a series of wires of lead or other which the following is a specification. ductile metal, and a second strand, F, of elas- My invention has reference to packing for tie rubber, having a height equal to that of piston-rods; and it'consists of certain imthe textile strand and a width sufficient to provements, which are fully set forth in the give considerable elasticity. This rubber Io following specification and shown in the acstrand F presses laterally against the textile companying drawing, which forms a part strand and vertically upon the diagonal strip thereof. B of the lower member.

The Object of my invention is to providea In operation the elasticity of the rubber packing suitable for piston-rods and other strand Fexerted laterally and vertically per r 5 uses which shallhave greatself-adjustability, forms the dual function of feeding the texthereby making it automatic in reshaping tile strand against the rod to compensate and adjusting itself to compensate for wear. for wear and also of forcing down the strip In carrying out my invention I provide a B to spread the lower member R to compen- 7c packing consisting of a flexible rubber-andsate for wear of the lateral wall of the strip 20 canvas strip divided diagonally in the dime A. This adjustment is shown as having tion of its length, so that the two parts. may taken place to a slight extent in the drawing. slide over each other to compensate for wear This double function of the rubber strand F in the width, combined with a second 'meinis most important, as it insures the entire her arranged above'one of the rubber-andwidth from top to bottom of the packing to 25 canvas strips, consisting of a textile packing be automatically adjusted to compensate for to hold thelubricant, preferably provided wear throughout the entire lateral face with lead or ductile-metal wires embedded against the moving piston-rod. The rubber within it, and an elastic rubber. strip extendis put into a condition capable of exerting its ing vertically to one side of the textile maadjusting capacity by the compression given 30 terial and pressing downward upon one of to the packing in the initial adjustment of the canvas-and-rubber strips, whereby it perthe gland of the stuffingbox, and it conforms the dual function of adjusting the textinues to exert that influence until it has fully tile portion laterallyand the rubber-and-canexpanded. Upon further adjustment of the vas strip vertically. In this manner the gland the rubber F will once more be brought 5 packing asa whole has'great capacity for auto a degree of compression to again exert its tomatically'adj usting itself to compensate for adjusting capacity.

' wear of all members of the packing. Having now described my invention, what My invention will be better understood by I claim as new, anddesire to secure by Letters reference to the drawing, in which is shown Patent, is- A 0 a perspective view of a packing embodying 1. A packing consisting of the combination my invention with part in cross-section. of two longitudinal members superimposed.

R is the lower member, and S the upper one upon the other, one member being the member, of the packing, and these are superfull width of the packing comparatively non- 5 imposed and inclosed within a sheath G of compressible and divided diagonally to form 5 braided textile fiber. two strips of triangular cross-section and the The lower member is composed of the rubother member being composed of a strand of ber-and-canvas strand divided diagonally, as textile material, and a strand oi elastic rubat O, to form two strips A and B of triangular her of a height substantially equal to that of :00 cross-section and adapted to slide one upon the textile strand and resting upon the top 50 the other under vertical pressure, so as to of one of the triangular strips of the firstcause them to spread laterally to compensate mentioned member. for lateral wear. This member R has flexi- 2. Apacking consisting of the combination 10 the textile strand and resting upon the top of one of the triangular strips of the firstmentioned member, and the whole incased within a textile sheet or covering to hold the several members together.

In testimony of which invention I hereunto 15 set my hand.

' MARSHALL MONTGOMERY.

Witnesses:

M. J. EYRE, R. M. HUNTER.

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