US1063741A - Electric safety signal device. - Google Patents

Description

J. A. SGHBL'LENGER. ELECTRIC SAFETY SIGNA L DEVICE. APPLICATION FILED MAY 26, 1911.

Paitented June 3, 1913.

1 041? moeo l-Tan satires;

:r'osnrn a. sonnniinnenaci aaiisrsaeuae, ir-tiireisl ELECTZRIC SAFETY SEGNAL 1376'? 1833.

nal Devices, of which the following is a specification. v

The invent onrelates to improvements 1n electrical {signal systems for mine shattsi; elevators, orthe like, and has for an ob ect' to provide'ai simple signal system wherein, the cost 01% installation and maintenance is reduced to a minimum, the necessity ofvconstant electrical contact between the car and the bus-bars is eliminated, and the possible chance of disarrangement of the parts is practically obliterated.

With the above, and other objects in viewwhich. will appear as the description' progrosses, the invention resides in the novel construction and arrangement of parts hereinafter fully described and claimed.

In the accompanying drawings the system is illustrated as preferably applied, and in which drawings,

Figure l is a vertical view of a mine shaft with the system arranged therein. Fig. 2 is a top plan View of the mine shaft and cage disclosing the relation of the coacting' part-s. Fig. 3 is a cross-sectional view of the circuit closer in detail.

Reference being had to the several views of the drawing, wherein like numerals indicate similar parts, two conductors designated by the numerals 1 and 2 and preferably comprising substantially L-shaped angle bars, are secured to and parallel with one of the walls of the shaft. 'From the upper end of the conductor 1 a connection 3 is led to a battery 4, comprising a sutlicient number of cells in series, and to the hell or other signal device'5, preferably located in the en- .gine room. An insulated connection 6, leads from the hell 5 tothevbell 7, located on the first levelof the mine, and a connection 8 from the belt? to the hell 9 located on the second or lower level. The remaining postof the hell 9 is connected to the conductor 2 by theconnections 1O.

The circuit closing means, to be mounted on the cage, comprises a substantially T- shaped member, consisting of a contactbar 11 adapted to spanthe two conductors in its Speeificatienof Letters -1? tent. Application as May as, 1911. Serih l no. seas la.

operativeposition and formed with a push rod 12 intermediate its ends and atright angles to its axis, the freeend of the push rod being threaded to receive the hand grip 13. A suitable housing, consisting of a lease plate 14 formed cent-rally with an opening 15 adaptedto receive the push rod 12,

i Patented-June 3, 1913.. i

and a casing 16 also provided with an open- I ing 17 and a tubular extension 18 projecting inwardly from the opening. A coiled spring 19 is placed on the push rod 12 afterit has been inserted in the opening 15 in the base plate 14 and the hand grip 13, is then inserted in the tubularopening 17 of the easing 16 and attached to the push rod thereby placing the spring under tension between the baseand the inner face of the grip, the diameter of the latter being greater than that of the push rod. 5

From the foregoing it will be seen that with the system applied, as illustratedf'the usual constant sliding contacts or suspended cable connect-ions between the cage and the signal circuit is dispensed with, anequal resistance in'the circuit is maintained by reason of the simple arrangement of thewiring, one end of the signal circuit being connected at the top of the shaft to the conductor 1 and the other end to the lower end of the conductor 2. Whenit is desired to signal engineers in the engine room or the workmen at any of the levels, the operator pushes inwardly upon the grip against the tension of the spring thereby forcing the.

contact, bar 11 outward from the side of the cage and into contact with the conductorsthus completing the circuitt-hroughout' the system. As soon as the grip .is released'the spring returns the contact bar to its inoperative position.

Having thus described the invention, what- I claim as new is I In a signal system for mine shafts, the

combination with the shaft and a cage slid-.

able therein, of a pair of rigid conductors secured to one wall of the shaft adjacent the path of travel of the cage and spaced apart, an electric circuit and a source of energy therein, said rigid conductors forming overlapped terminals of the circuit and having connections with the circuit at relatively opposite ends, a plurality of signal devices connected in series in the circuitand adapted to be arranged at the various levels in the mine and adjacent the cage hoist, means car- In testimony whereof I aflix my signature ried by said cage and operable to bridge the in presence of two witnesses.

said rigidIconducto-rs in the movement of w the cage whereby the signal devices may. be JOSEPH L G operated, and means for holding the last- Witnesses:

named means out of contact with the rigid JOSEPH H. PmnsoN,

conductors. MARION SQ WI-IITLEY.

Copies of this patent may be obtained for five. cents each, by addressing the Commissioner of Patents.

' I Washington, D. 0.

Images