US998252A - Automatic high-temperature-alarm apparatus. - Google Patents

Description

J. V. LUNDSTROM & KQ NIBLSEN. AUTOMATIG HIGH TEMPERATURE ALARM APPARATUS.

APPLIGATIONTILED PEB.1G,1E)10.

Patented July 18, 1911.

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30111? "V. LUN'DSTROM AND KNUD NIELSEN, OF SGHENECTADY, NEW! YORK.

AUTOMATIC HIGH-TEMPERATURE-ALARM APPARATUS.

Specification of I etters Patent.

Application filed February 16, 1910. Serial No. 544,162.

To-all whom it may concern:

Be it known that we, JOHN V. Lonn- STROM and Knob NIELSEN, of whom Jonn V. Imunsrnoir is a subject of the King oi Denmark and his on NIELSEN is a citizen of the United States, both residing at Schenectady, in the county of Schenectady and State of New York, have invented certain new and useful Improvements in Automatic lligh Temperature Alarm Apparatus, of which the i ollowing is a specification.

Our invention relates to automatic high-- temperature alarm. apparatus, and the object of our invention is to provide a device which may be so arranged that it will sound an alarm when. the temperature of a predetermined apartment or particular location in. en a srtiucnt shall have reached a con tain predetermined degree, together with such elements and combinations as are here inatler more particularly set forth and claimed. W e accomplish these objects by moons of the ineclninisin illustrated in the accompanying drawings, in which:

Figure l u "rout elevation. Fig. 2- a side elevation. 3 :1. cross section along the line X---X on 1. Fig. 4- a longitudinal section along the line Y--Y on Similar letters refer to similarparts throughout the several views.

The plate, A, is mounted. in uny suitable manner on thc side of the wall of an upurtineut or in any convenient place and has suitably mounted thereon by means of straps, o, 11., or in -any convenient. manner, the tube, ll, (preferably glass) provided with a bulb, (l, at one end in which tube Inn y be placed mercury, l), or other ingredient suitable toruse in u thermometer. ldxtending into the bulb, C, at the bottom of the tube is a. connecting plug, E, which ongages the mercury, D, and has, outside of the bulb, C, a contacting head, 1*, with wnich the spring contact or'switch, G, is electrically connected, by means of the plate, ,7 to the current'bcaring wire, ll, which is connected with one of the poles of the elec tric bell magnet, J, the other pole oi the magnet, J, being connected with the battery, K, which will also be connected by wire, is,

with the metallic tube, L, as hereinafter more particularly described.

9n the top of the tube, B, we place a cap, '6), which is formed upon or attached to the tube, e, which is preferably brass and which the tube at that end.

carries a wire, M, secured in the end of the tube, L, preferably by insulated contact screw N. W'c place within the tube, 0, a suitable packing and rubber plugs n, u about the wire, M, as shown in Fig: i. En-

velo-ping the tube, 6, is the metallic tube,

L, which reciprocates upon the tube, 6, by means of the operation of a pinion, O, and rack, P, the rack being, s cured. to the rear of the tube as shown in Fig. 2, the pinion, 0, being mounted on a spindle, 7;, extending into the plate, A, and having a thumb screw, 9, projecting from the side of the plate to operate the same. 'We also preferably arrange tor guiding or supporting, the tube, L, when it is raised on the tube, We attach the angle arms, f, f, to the plate, 1 above the end of the tube, (2, which angle arms project into suitable grooves, it, alone the edge of the rack, P, at its junction with the surface of the tube, L. Thus the tube, l), when raised by the pinion will be prevented from leaning to one side or the other and the location of the angle arms in reference to the tube may be adjusted to suit the necessities of the case. The metallic tube, L, is closed at its upper end preventing air from entering, lie tube, 6, is closed at the end thereof which is within the tube, L, and also in lower end of said tube as shown in Fig. i. The tube, B, is covered closely by the cap, b, on the tube, a. The mercury in the tube, l, is therefore in substantially an airtight apartment.

Attached to the tube, L, is a pointer, R, which registers with 21 scale, S, attached to the plate, .A. It is apparent that. the position of the end of the wire, M, within the tube, ll, will be indicated on the sca e, S, by the pointer, R, since the wire is attached tothe tube, 1/, and when that tube is moved toward the tube, ll, the wire will move toward the bottom oi the tube and its relative position therein will be indicated by he pointerattached to the tube, L, on the scale, to. \Ve preferably pluw on the scale, S, figures extending from zero to one hundred.

and eighty, for the purpose oi 'indiceting respectively the degrees of heat necessary to cause the inecury in the tube, B, to rise and inin'iersc the end of the wire, M, at its position when the pointer registers with the several degrees on the scale. NVe also place on the plate, A, above the tube, L, a. projection, T, whiclris in the path of the move ment otthe tube, L, and will act as a stop Patented July 18, 19311.

stance to prevent the tube from being moved out of contact with the tube, e, therefore preventing its falling and breaking.

The operation of our invention is easily understood. The wire connected with the e'ndof the tube, L, being in contact with the wire, M, in the tube by means of the insulated contact screw, N, leads to the battery, K, the battery being in circuit with the bell magnet, J, whereby the bell, U, may be runghnd with the wire, la, in contact with the plug E, which. is immersed with the niercury D, in the tube, B. Thus when the mercury, D, is raised by the temperature of the room in which it is placed so that it will immerse the end of the wire, M, the circuit is completed and the bell is rung.

Our invention is inexpensive in construction, simple in operation and performs the functions equired' of it in a positive and SlIl lSIEi etory manner. No parts are exposed which are liable to become dis advantageously aii'ected by the action of the elements. it is not cumbersome, takes but little room, attractive in appearance and is easily adjusted to the circumstances requircd regarding the amount of heat necessary in order to girean alarm. It may be used not only in ca of a fire, but also for the purpose of notifying lheoilice that the temperature of a cold storage or other plant had become too great.

The tube, B, constructed of such size that tho mercury will not become separated into particles after it has engaged the wire. \Vhcn the temperature decreases if the tube is too contracted the mercury is quite likely to become broken up because of the friction between the sides of the glass tube and the wire. F

We do not want to limit ourselves to the material of: which we construct the variousparts of our device, although we have referred to a brass tube. et as: any suitable .material will come within the scope of our vinvention.

\Vherc age ha \"c referred in the speciliczu tioi ri'and rilainis to mercury, we mean to be understood as including any suitable subwhi h will readily indicate the cl'iangcs i i temperature and adapted for use in tbermoim-lcrs. We have referred to the use of a bz-ll mania-t, but we do not want to limit oursclroi: to that particular means For iring an alarm. lVhere we harlreferred to the term uh-c" herein we mean to include.

not only a wire oi one thickness throughout,

but. it necessary,.niil'ering in diameien What we claim as our invention and desire thermometer enveloping tube and with said spring con tact; and an alarm device placed in circuitwith the battery and said contacts, substantially as described.

The combination of glass containing an expansible liuid; a metallic tube; a cap on one end of said tube adapted to fit over one end of said glass; an enveloping tube closed at one end adapted to reciprocate on said metallic tube; a wire connected at one end to the closed end of 'said enveloping tube and extending through said metallic tube into the thermometer glass; a connecting plug inserted in the thermometer glass; :1 spring contact; adapted to engage said plug; a battery; an alarm device; wires connecting said spring contact and said wire in the metallic tube in circuit with the battery and alarm device when the fluid contents of the glass tube engage the wire therein; and a int-ans for indicating the extent of the projection of the wire into the thermometer glass.

3. The combination of a thcrmmneter glass containing an cxpansiblc fluid; a molallic tube; a cap on one cud oi the tube adapted to fit over one end of said glass; on envelo jiing tube closed at one end adapted to rta-iprocate on said metallic iubez'a wire;

a contact for said wire at the closed end ofsaid envcloiing' tube, said wire extending through said metallic tube into the said glass tube; a metallic plug inserted in said glass tube; a contact for that port ion ol" said plug which is exterior to said tube; an alarm device; a battery; wires connecting said (ontact adapted to engage said plug' and said contact connecting the wire in the metallic tube with the enveloping lube; and a means -i'or iiulirrlingthe position of the \.'ll't in the lllll'llHillHlll glass substantially as described.

4. The combination oi" a lliermomclci. 'lass containing an cxpausihlo fluid; a motallic tube adapted to lit onto the end of said glass; an enveloping a thermometerv tube adapted to reciprocate on said niclallic lul to secure by Letters Patent, is: a. wire; a contact for said wire at the end of 125 l. i \u automatic dovic'c for registering an. said enveloping tube, said wire extending alarm, comprising a thermometer glass; a through said metallic tube into the said thcr metallic tube; a cap on the end of thi tube mometer glass; plugs of non-conducting adul tcd to fit over the end oithe. thermomesubstan't-o in said i'nelallic tube near each tor glass; an enveloping tube closed at one end thereof; an electric connecting plug; in-

eee,252

serted in said thermometer, glass; a contact for said electric connecting plug exterior of said glass; an alarm device; a battery; av

means for placing in circuit with said battery the alarm device and each of said contacts; and a means for indicating the position of the wire in the thermometer glass.

5. The combination with a thermometer glass containing expansible fluid of a tube provided with a cap; plugs of non-conducting substance in said tube near each end thereof; the end of said thermometer glass snugly enveloped by said cap; an enveloping tube adapted to reciprocate upon said first mentioned tube; a wire extending through said first mentioned tube and through said plugs therein and into said thermometer lowered in the thermometer glass; a means for electrically connecting the contents of said thermometer glass and said wire with a battery; an alarm device in the circuit between said wire and the contents of said thermomet er glass.

In testimony whereof we have afiixed our signatures in presence of two Witnesses.

JOHN V. LUNDSTROM. KNUD NIELSEN. Witnesses:

FREDERICK W. CAMERON, J. W. FISHER.

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