Miner s safety-box
US 368471 A
Description (OCR text may contain errors)
MINERS SAFETY BOX.
No. 368,471. Patented Aug. 16, 1887.
. close them.
UNTTEn STATEs PATENT @EETcE JOHN HARGRAVES, OF ST. CLAIR, PENNSYLVANIA.
SPECIFICATION forming part of Letters Patent No. 368,471, dated August 16, 1887.
Application filed February 5, 1887. Serial No. 926,698. (No model.)
To aZZ whom it may concern.-
Be it known that I, JOHN IIARG'RAVES, a citizen of the United States, residing at St. Clair, in the county of Schuylkill and State of Pennsylvania, haveinvented a new and useful Improvement in Miners Safety Boxes, of which the following is a specification.
The invention is an improved device to enable miners to carry squibs, matehes,and torchpaper for the purpose of firing the blasts. The torch-paper is usually paper steeped or soaked in saltpeter, (sulphate of potash,) so that it will burn readily without flame, and will fire the squib and blast without igniting the gases accumulating within the mines.
The invention consists in the construction and novel arrangement of parts hereinafter described,pointed out in the appended claims, and illustrated in the accompanying drawings, in which- Figure 1 represents a perspective view of the box, showing the top punched or knocked up in such manner as to form a space on which to ignite the matches. Fig. 2 represents a perspective vicwof the same with the top turned oft and to one side. Fig. 8 represents a central longitudinal section of the device,showing the compartments into which its interior is divided.
Referring to the drawings by letter, A designates the body of the device, preferably oval in cross-section and divided by the longitudinal partition a and the transverse partitions a a into the chambers 13, G, and D, the first running the entire length of the box, and designed to contain squibs, and the chambers O and D being respectively designed to con tain matches and torch-paper.
The chamber B is open at the top but closed at the bottom by the partial partition to. The chamber 0, which is designed to contain torchpaper, is open at its lower end, which end is covered by the cap Z),the said cap fitting upon the lower end of the device.
The chambers 13 and D are open at their upper ends, and the cap or cover (Z is used to The said cap fits over the upper end of the body A, and has secured to each of its sides the downwardly-projecting straps E, having the pivotal pins 0 0 near their inner ends. The said straps slip outward and inward in the guide-frames F, which are secured longitudinally to the sides of the body of the box, and are provided with the direetingslots ff in their outer sides, in which slots the pins 0 eengage. The outer ends of the said slots are rounded, so that when the straps E are pulled out totheir farthest extent the pins 0 a will turn in the said rounded ends and will move the cap (7. to one side and from offthe body of the box. The upper ends of the guideframes are cut away, as shown atf,and when the cap is moved off the body the arms E will rest upon these cutaway portions and support the cap, as shown in Fig. 2. The top of the cap cl has the rows of elevations d punched upon it, which elevations make its exterior surface sullicicntly rough for a match to light thereon.
It is evident from the foregoing description that the squibs, matches, and torch-paper can all be conveniently carried by the device, that the squibs can be ignited by matches when there is no danger in so doing; but should explosive gases be present, the squibs and torchpaper will be used to fire the cartridge.
The box keeps the three articles separate from each other, and keeps them dry and in condition for immediate use, as each is tightly inclosed in its own chamber or compartment.
Having described my invention, I claim 1. The combination, with the body of the box and the guide-frames secured upon the sides thereof and having longitudinal slots, of the cover provided with side arms having pivotal pins at their ends, the said pivotal pins working in the longitudinal slots in the guideframes,and the arms of the cover being between the guide-frame and the side of the box, substantially as specified.
2. The combination of the body of the box, the guide frames secured upon the sides thereof, having the longitudinal slots and the cutaway portions at their upper ends,and the cover having the side arms provided with pivotal pins at their ends, the said pivotal pins working in the slots in the guide-frames, and the said arms resting on the cut-away portions of the guide-frames when the lid is swung from off the body, substantially as specified.
The herein-described box, having the body A,divided by thepartitions a and a into the compartments B, G, and D, the cap I) on In testimony that I claim the foregoing as the lower end of said body, the cover (1, promy own I have hereto afiixed my signature in vided with the straps or arms E, having the presence of two witnesses.
pivotal pins e,and the guide-frames F, secured JOHN HARGRAVES. 5 to the sides of the body and provided with Witnesses:
the guide-slots f f, all combined and arranged H. B. DAVIS,
substantially as and for the purpose specified. JAMES JAHN.