US 2030468 A
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Feb. 11', 1936. Fjc. RAHLMANN FIRE EXTINGUISHER 2. Sheets-Sheet 1 Filed Oct. 16, 1934 Inventor F C Fez/m a n n q By Attorney Feb. 11, 1936. c, RAHLMANN FIRE EXTINGUISHER Filed Oct. 16, 1934 2 Sheets-Sheet 2 Inventor Attomey Patented Feb. 11,1936
UNITED STATES FIRE EXTINGUISHER Frederick c. Rahlmann, San Antonio, Tex, assignor of fifteen one-hundredths to G. Woodson Morris, San Antonio, Tex.
Application Gctober 16, 1934, Serial No. 748,538 2 @laima. (Cl. 169-26) This invention appertains to new and useful improvements inand more particularly to extinguishers ofthe type employing releasable bombs containing fire extinguishing material.
The principal object of ,the present invention is to provide an extinguisher which incorporates a thermostatic element so that when the said element is affected by heat, thesame will act to release a fire extinguishing bomb, a sprinkler valve, or other fire extinguishing means, and ii desired, simultaneously energize an alarm.
Other important objects and advantages of the invention will become apparent to the reader of the following specification. 35 In drawings: 7
Figure 1 is a side elevational view of the switch, and'diagrammatically showing the electrical con- -nections between the switch and the alarm.
Figure 2 is a sectional view taken substantially on line 2-2 of Figure 1.
Figure 3 is a side elevational view of the switch and associated electrical connections, said switcl being shown in released position and dropping a fire extinguishing bomb.
Figure 4 is a front elevational view of the strip spring.
Fig. 5 is a fragmentary longitudinal sectional. view showing the destructible insulation and 0011- I ductor wires.
.0 Referring to the drawings wherein like numerals designate like parts, it can be seen that the switch proper includes a frame made up of the vertical angle iron 5 and the horizontal spaced bars 6 and 1 extending therefro the bar 6 being substantially longer than the bar 17 and being provided with afoot portion 8 to which the upper end of the elongated strip spring 9 is secured,
the spring having a natural tendency to spring to the position shown in Figure 3. a
Feedable through a threaded opening in the spring 9 isthe adjusting screw 80 and to this screw is attached one end of the thermostatic wire H, the opposite end.being attached to the post l2 which extends through an insert of insulation material in one flange of the vertical frame member 5, this, insert being denoted by numeral The post i2 is connected by a jmnper M to one of a pair of adjacent wires insulated from each this arm is connected by the jumper H to- .5 one side of a source of current I8, the other side contactor 21 is the cable other by insulation of a fire destructible character of the source of current having one end of a free wire it secured thereto and disposed in close proximity to the jumper M as shown in Figure 5 so that whenever the insulation I9a which covers and separates the same burns ofi and the wire 5 comes together, a circuit is established through the conductor 69, jumper it, thermostatic wire H, spring 9, arm i5, jumper I7 and battery 58 or other source of current which results in the heating of the wire it and release the spring 9 so that the fibre lug at the lower end thereof. disengages from the arm l5. To insure good connection between the adjusting screw it and the arm iii a copper wire 23 is trained along spring 9 to a copper or bronze 15 arch contact 20' to arm I 5. And to insure against burning and sticking at point of suspension lug 2% is a fibre support. Numeral 2! represents a bomb containing carbon tetrachloride or some other chemical oi fire extinguishing property, the g bomb being provided witha book 22 for engagement over the arm. Obviously, when the arm is released to the position shown in Figure 3, .the hook 22 will slide ofi of the armand will perform its function as it breaks against the floor 5, or some other structure.
Numeral 26 represents an taining the annunciator 25 and a switch generally referred to by numeral 26 which includes a contactor 21 normally maintained in closed so position by a spring 28. Extending from this 29 trained over a suitable number or pulleys 30 to connect to the aforementioned swingable arm i5.
Obviouslmwhen the arm I5 is released to the position shown in Figure 3, the cable 29 will be slackenedsufiicient to permit the contactor 21 to regain circuit closed position and result in the energization of the alarm 25, simultaneously with the dropping of the bomb 2|.
While the foregoing specification sets forth the invention in specific terms, it is to be understood that numerous changes in the shape, size and materials may be resorted to without departing from the spirit and scope of the invention a hereinafter. claimed.
Having described my invention, what is claimed as new is: p v
1. In combination, a support, a swingable arm 'on the support adapted to swing from a horizontal to a. vertical position, a thermostatic element secured at one end to' the support, 9. lug on the opposite end of the element for sustaining the arm in horizontal position, said thermostatic element adapted to flex under an increased tem- 66 alarm circuit conthe expansion thereof to 10 pemture rte move the lug from the arm, a spring on the element in normal tensionai engagement with the arm to urge said am downwardly when released by the displacement of the lug, and a. fire ext -t v bomb siidable on the arm and adapted to he released from the arm when the arm moves downwardly.
2. In emnbtnetion, a support, a swingable arm on the supp-ext adapted to swing from a, horieontel te a vertical position, e, thermostatic element secured at one end to the support, a lug en the opneeite end of the element for sustainthe the arm in horizontal position, said theme etetie element adapted to flex under an iner temperature te more the leg from the arm, a spring on the element in no tensionai engagement with the arm to urge said arm down wardiy when released by the displacement of the lug, a. fire extinguishing bomb slidable on the arm and adapted to be released from the arm when the arm moves downwardly, a. source of current, said am, thermostatic element and spring being of current conducting material, a. connector extending from one side of the current source to the arm, a pair of remotely extending conductors provided with fire destruetibie u= iation between the same, one of said conductors being connected to the other side of the seurce of current and the other conductor to the said thermostatic element.