US732541A - Gas-check pad for breech-loading ordnance. - Google Patents

Description

G. GBRDOM. CHECK PAY FR BREF. ri LGADG ORDN'ANGE.

APPLIQATO' FILED IDEC. 2'?. 1902.

N0 MODEL. 2 SHEETS-SHEET l'.

@y All@ Hor., 732,541.

PATENTED JUNE 30, 1903.

G. GERDOM. GS CHECK PAD FOR BREEGH LOADNG ORDNANCE.

APPLICATION FILED DE()x 27, 1902.

2 SHEETS-Smm 2.

UO MODEL.

- UNITED STATES Patented June 30, 1903.

PATENT EEICE. A

` GREGORY GERDOM, OF WATERVLIET, NEW YORK, AssIGNOR 'ro ORDNANOE' IMPROVEMENT COMPANY, A CORPORATION or NEW YORK; y

eAs-cHEcK PAD FOR Bassora-LOADING omznuluqc4 SPEQIFICATION forming part of Letters Patent N o. 732,541, dated June 30, 1903.

Application filed December 27.v 1902. vSerial No. 136.770. (No model i y To all whom it kTn/ow/ concern.-

Be it known that I, GREGORY GERDM, of Va-tervliet, Albany county, New York, have invented a new and useful Gas-Check Pad for Breech-Loading Ordnance, of which the.

following is a specification.

My invention relates to improvements in gas-cl1eek pads for breech-loadin g ordnance, its object being to provide a pad which will be practically unaffected by extreme ranges of temperature and also which cannot be' burned or otherwise injured by contact with the powder-gases.

To this end my ,invention consists in the` improved plastic composition adapted to con# stitute the body of the pad and in the envelop therefor, both as hereinafter particularly de-` scribed and claimed. l

The type of gas-check for which luy-invention is adapted is known as the De Bange, in which the pad is seated upon the forward end of the breech-block and a mushroom head bears upon the pad and has a stem extending through an axial opening in Vthey pad and In the service use of guns iittedfw'ith the above-described type of gas-check it has 'been found that the canvas envelop or covering for Y the pad' is permanently injured or destroyed in case -of slight leakage of gas which comes into contact with it. Itis also found that the composition heretofore used in such pads by extreme cold is rendered too rigid for its designed functionand that repeated firings of a gun will raise the temperature of the chamber and of the pad to such a degree that the com-A position is reduced to such soft condition that it fails to retain its normal shape and seriously interferes with the action of the breechblock. My improved composition, however, is practicallynnaffected by the extreme maximum rand minimum temperatures to which it is subjected in service. f-

Myimproved pad envelop or covering, while perfectly iexible, so as to yield to pressures modifying the lform of the pad, is wholly unaiected by the hot gases which may leak into con tact with it. The composition for the core consists of the following ingredients comd pounded vin substantially the followingv proportions and manner: Take about-four parts, by measure, of glycerin, with one part, by measure, of starch, mix and cook until reduced to a stiff paste and then add two parts, by measure, of tallow or li-nseed orothersuitable oil and mix thoroughly whilehot.'` The mass should then be allowed to stand for sev-t,

eral days. .j This paste is thenmixed with asbestos in about the following proportionsviz., twenty to thirty per cent of paste Iwith. eighty to seventy per cent of asbestos. This is thoroughly mixed and should be allowed to stand under pressure for several days, after which it is ready for molding into pads. The

pad so molded is covered with the wire en velop inthe manner hereinafter described.

In the accompanying drawings, forming part of this specification, Figure 1 represents a sectional sideelevation of my improved pad before it is subjected to final pressure. Fig. 2 is a plan view of the pad complete, show ing .the interlocking and uniting edges of the covering. Fig. 3 is a side orv edge elevation of the complete pad, a portion-being broken away to show theembedding of the wires of the covering in the mass ofthe core under final pressure. Fig. 4 is an enlarged detail of apiece of the wire-netting used for the covering. Fig. is a similar'view ofthe same distorted, as when applied to the core; and Fig. 6 is a detail showing the interlocked edges of the netting as it is secured in place. y

' In the drawings, A represents the core of plastic material, and B its envelop of wirenetting. The general form of the core, as is well understood, is annular and' properly shaped to lit its seat upon the end of the breech-block. and the mushroom head which `bears upon its opposite face; The composition hereinbefore described having been molded' into the proper form is covered '-by the wirenetting B in the following manner A piece of the netting, being distorted, as indicated in Fig. 5, in the direction of the plane of the pad, is folded around the outer periphery of the core andthe meeting ends are'interlocked by passing the wire ends 2 around the wire 3 of -the opposite sclvage edge and bending them L -Wires by solder.

`two pieces of fabric are then secured together,

s shown in Fi'gs. l, 2, and 3, by laying an an- 'nular piece 0f asbestos or oth er non-conductor underneath the same and then uniting the After the pad has thus been :completed it Ais subjected to heavy pressure, which forces the Wires into the mass of the core or, conversely, the mass of the core out 'between the vWires, so that the wires are completely embedded therein and a smooth surface is presented to the adjacent parts of the gun, as shown inA Fig;V 3.' The envelp is free Vto yield to Athe pressures which modify the for-m of the pad, while retaining the contents, and is unaffected by a leakage of hot gases, which would burn and cut a combustible 'envelep After the pad is finished it should. be vsubjected for about one hour to a heat of about 300 Fahrenheit and after cool- 4Aing should be given one or more coats of linseed-oil. After drying the pad should be returned to the press for final pressure andl shaping;

I claiml. A gas-check pad, comprising a plastic core having a metallic cloth envelop.

2. A gas-check pad comprising a plastic core and a Wire-cloth envelop constructed substantially as specified.

A gas-check pad having a plastic-core, and a Wire-cloth envelop formed by folding sections of cloth upon the core and uniting the overlapping edges with solder.

4. A gas-check pad comprisin gin combination a iiexible envelop and a plastic core composed of asbestos, a suitable grease, glycerin and starch combined substantially in the proportions and manner specied.

5. A gas-check pad comprising in combin'ation, a iiexible Wire-cloth envelop and a plastic core composed of,asbestos, a suitable grease., glycerin and starch, constructed and combined substantially as specified.

Signed at New York city this 19th day of December, 1902.

GREGORY GERDOM.

Vitnesses:

T..D. MERWIN, '.l. T. CRANE.

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