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Publication numberUS1131876 A
Publication typeGrant
Publication dateMar 16, 1915
Filing dateOct 23, 1913
Priority dateOct 23, 1913
Publication numberUS 1131876 A, US 1131876A, US-A-1131876, US1131876 A, US1131876A
InventorsChester Tietig
Original AssigneeChester Tietig
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Tamping device.
US 1131876 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)


- Patented Mar. 16, 1915.

Witt woo HESTEBfTIETIG, or emanating, 931

rmrmc nnv cE.

Specification ofiettrs ratent. v

Application filed October 23, 1913. Serial 1V0. 798,919.

T all whom it may concern:

Be it known that I, CHESTER TIET'IG, a citizen of the United States, residing at No. 2402, Ohio avenue, Cincinnati, in the county of Hamilton and State of Ohio, have invented certain new and useful Improvements in Tamping Devices, of which the following is a specification.

This invention relates to devices for blasting out earth, coal, rock etc., but it is especially adapted for blasting out coal; and in this application it is shown to be applied to this use of it.

The object of this invention is to provide a means of tamping for exploslve charges contained in bore holes. It 1s desi ed particularly to prevent the strikingfo the detonator, or the explosive proper, by the tamp- 7 tion may be used with clay behind it,

ing stick, such as is use when clay or 511111- lar substance is the sole tamp ng material.

A secondary object of the invention is to provide a secure tamping such as will prevent the ignition of m1ne gases when used with permissible explosives, by preventin what is known as a blow out shot. For this, and for other purposes, this invenas the auxiliary tamping material. The invention is fully illustrated in the accompanying drawings, in which- Figure 1, is a longitudinal v1e w.of a portion of the de 'ce partly in section. Fig. 2 is a'longitudina view of the holdmg mplement employed. Fig. 3 is a plan view of the front face of the holding irfiment. Fig. 4 is a side elevation of a m cation of the plug, and Fig, 5'is a face-view of the I plug, showing another modification.

The various features of the device are referred to by the numeral characters, similar numerals denoting corresponding parts in the several views. f

The numeral 8 designates a tube, made of thin pasteboard or other easily worn material, and which has a diameter slightly less than the bore hole. ing both ways, tube and is provided with a longitudinal opening 11. A rigid cap 12, covers the uper end of the tube 8 and has acentralperoration 13.

. diameter of the cap 'A plug'10 taper-- closes the lower end of the A cord 14, secured to the lower end of the plu 10, passes through the plug, ,the tube an the cap.

The tube 8 is tightly packed with a filling 18, which is preferably composed of spun blast furnace slag, commonly known as mineral wool.

20 designates a cap retaining implement, comprising a stock 22, with a rigid disk 24, on one of its ends, and a handle 25, on its other end. This disk is centrally perforated for the passage of the cord 14, and has a slot, extending from its outer edge to its central perforation, to admit the cord. The diameter of this disk is slightly less than the 12. For convenience in carrying, the stock may be jointed intermediate of its ends.

A modification of the plug is shown in Fig. 4, in which the forwardtaper of the plug, is cut oif to form a truncated cone, and a further modification is shown in Fig. 5, in which the front face shown in Fig. 4, is dished,-or recessed these modifications is to reduce the quantity of air s ace between the detonator and the end of t e plug.

The operation of this invention is as follows; The tube with its lug, cap and cord, are assembled, and care 11y ad usted upon the charge, which has been placed in the bottom of the boring. The holding implement 20, is then inserted with its disk 24, firmly held against the cap 12, of the tube 8. The cord is then pulled steadily back, drawing the plug into the tube, which-breaks apart, and the filling tightly fills up the space between the tube and the wall of the boring. The holding implement is now withdrawn and if it is desired clay may be put into the boring and tamped tightly upon the cap,

' without fear ofigniting thecharge with the tam ing stick. aving now I claim 1s,

1. In a tamping terial in said tube, a .plu' of said tube, a perforat described the invention, what in thelower end cap on the upper end of said tube, and'a cord secured to said plug and extending through said plug, said tubeand said cap.

as at 26. The object of' device a tube, filling ma-- Patented Mar. 1c, 1915.

In testimon whereof I afiix my signature 1n presence 0 two witnesses,


v Witnesses:


Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2590882 *Mar 17, 1948Apr 1, 1952Morton Stanley ATamping or stemming plug
US4754705 *Nov 17, 1986Jul 5, 1988The Curators Of The University Of MissouriMechanical stemming construction for blast holes and method of use
US5247886 *Oct 14, 1992Sep 28, 1993The Curators Of The University Of MissouriBlast plug and stemming construction for blast holes
US5253586 *Oct 15, 1992Oct 19, 1993The Curators Of The University Of MissouriMethod of stemming a blast hole
U.S. Classification102/333
Cooperative ClassificationF42D1/18