US681128A - Automatic fire-alarm. - Google Patents

Description

- Patented Aug. 20, I90I. C. E. LUMBARD. AUTOMATIC FIRE ALARM.

' No. samzs.

(Application filed Kay 9, 1901.)

(No Model.)

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awa f PATENT UFFICE."

CHARLES E. LOMBARD, OF EAST WILTON, MAINE.

AUTOMATIC FIRE-ALARM.

SPECIFICATION forming part of Letters Patent No. 681,128, dated August 20,- 1901.

Application filed May 9, 1901. Serial No. 59,505. (No model.) i

To all whom it may concern:

Be it known that 1, CHARLES E. LOMBARD, a citizen of the United States, residing at East Wilton, in the county of Franklin and State such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the letters of reference marked thereon, which form a part of this specification. 1

This invention relates to new and useful improvements in fire-alarms, and especially to an automatic apparatus so arranged that when the temperature rises to a certain degree fusible couplings are designed to melt, thus actuating mechanism which will sound an alarm at any desired location.

The invention will be hereinafter more fully described and then specifically defined in the appended claims, and is clearly illustrated in the accompanying drawings, which, with the letters of reference marked thereon, form a part of this application, and in which drawings similar letters of reference indicate like parts throughout the several views, in which- Figure 1 is a sectional perspective view showing in elevation the alarm apparatus. Fig. 2'is a section longitudinally through a fusible coupling. Fig. 3 is a plan view of means for holding the cable. Fig. at is a section of alarm-bell, and Fig. 5 is a detail view of a section of a cable.

Reference now being had to the details of j the drawings by letter,'A designates the ceiling of a room which is equipped with my firealarm wires, said wires being in sections B B and normally held together by means of fusible couplings G and which couplings are designed to melt under a high temperature. These wire sections when connected together are held to the ceiling by the flanged pulleys D, and one end is securely anchored, as at D. Swivel elbows E are mounted on the pivotal pins E, fastened to the ceiling, and to the ends of said elbows are fastened said wires, while the other end of the wire-sections are fastened to the end of the clamping-lever F, which is mounted on the pivotal pin F. The pivotal pin F, on which the jaw F is mounted, passes through .the plate G, which is secured to. the ceiling and which plate is apertured at G, through which aper ture thee-able H passes. On one side of said aperture a plate H is secured with its inner edge projecting over the margin of said aperture and forming a stationary jaw which cooperates with the pivoted clamping-lever F to hold the cable at its lowest limit. Said cable has recesses h, Figs. 4 and 5, in which the edge of the plate G and the pivoted jaw F are adapted to be seated under normal conditions. When the sections B B are connected together and fastened to the end of the lever F, the free end of said lever will be held in said recesses in the cable, and the spring I, which is fastened 'at one end to the lever F and its other end secured to a pinch the plate G, is normally under tension. When one of the fusible couplings melts, the spring will throw the free end of the lever out of engagement with the cable and allow the latter to rise under the influence of the spring J, to which the cable is fastened at one end, its other end being fastened to a fixed point. It will be noted that this spring J is normally under tension.

At any suitable location a standard K is mounted, which carries a winding-drum K, suitably journaled, and secured to rotate with said drum is a ratchet-wheel K A dog K is pivoted on a pin it on said standard, one end of said dog engaging the teeth of said ratchet-wheel, while the opposite end is apertured and receives the cable H, which carries an adjustable collar Hiwhich is held in a fixed position by means of a set-screw. This collar serves as a trip and is adapted to contact with the under surface of the dog and cause the teeth-engaging end of said dog to be held out of the path of the teeth of the ratchet-wheel to allow the latter to revolve freely. Winding about said drum is a rope L, which after passing about the double pulley-blocks M and M is anchored to the block M, which also carries a weight M which weight serves to cause the drum to rotate when the dog is thrown away from the ratchetteeth, as described. Secured to the axis of the drum is a crank member having two arms N and N, to one of which, as N, is fastened a counterbalance-weight N while the other end is pivoted to one end of the link 0, which in turn is connected to the eye 0 on the end of the tongue 0 suspended within the bell P. This bell is mounted upon a suitable standard Q and is held stationary by means of the cross-piece P, which is fastened to the crank P said cross-arm being secured to the standard Q by means of the braces P In operation as one of the couplings fuses the wire sections under the tension of the spring I draw apart. The clamping-lever F is thrown away from the cable, allowing the latter to rise up under the influence of the spring J, which will throw the dog K out of the path of the ratchet-teeth on wheel K and allow the drum to rotate by reason of the rope unwinding under the pull of the Weight. As the drum rotates the crank-arm secured thereto will rotate, and thetongue of the bell will be drawn back and forth alternately, striking portions of the bell diametrically ope posite thereof.

Having thus described my invention, what I claim to be new, and desire to secureby Letters Patent, is-

1. An automatic fire-alarm system, comprising a wire and tension-spring secured thereto, a sounding-alarm mechanism which is actuated as said cable is moved under the tension of said spring, a stationary clampingjaw, a pivotedclamping-jaw which is springactuated, a series of wires with fusible connections, said line of wires being connected at one end to said pivoted clamping-jaw, and its other stationary, said jaws designed to normally hold the cable so that the spring secured thereto will be under tension, as set forth.

2. An automatic fire-alarm, consisting in combination with a wire, a spring secured at one end to said wire, at its other end to-a stationary object, a sounding-alarm mechanism designed to be sounded as said wire is actuated under the influence of the spring socured thereto, a stationary clamping-jaw, a

spring-actuated clamping-jaw adapted to co- I operate with said stationary jaw to hold the wire so that the spring secured thereto will be under tension, a series of wires with fusible connections forming a line, one end of which is secured to a stationary obj ect,thence passed about pulleys, and onto pivoted elbows and its other end secured to the end of said pivot-ed clamping-jaw, as set forth.

3. An automatic fire-alarm, comprising in combination with a cable, a spring secured at one end to the latter its other end secured to astationary object, a trip on said cable, a sounding-alarm and means for actuating same as the cable is actuated longitudinally under the tension of said spring, a line made up of a series of wires with fusible couplings, one end of said line being secured to a stationary 6 5 object, alternately -arranged pulleys about which said line passes, and onto the pivoted elbows a stationary clamping-jaw and a pivoted clamping-jaw and spring secured at one end to said pivoted jaw, its other end to a sta tionary object, said jaws adapted to engage a recess in said wire, one end of said line of wires secured to the end of the pivoted clamping-jaw and normally holding said lever so that the spring secured thereto will be under tension, as set forth.

4. In combination with the drum a ratchetwheel secured thereto, a pivoted pawl engaging the teeth of said ratchet-wheel, a springactuated wire, means for normally holding same so that the spring secured thereto will be under tension, a trip carried by the wire and designed to contact with and release said pawl from the ratchet-wheel, a cord secured to and winding about said drum, a weight secured to the other end of said cord, pulleys over which the cord passes, a crank secured to and rotating with said drum, a counterbalance-weight secured to said crank, a bell, alink connection between said crank and the 90 tongue of the bell, as set forth.

In testimony whereof I hereunto afiix my signature in presence of two witnesses.

CHARLES E. LOMBARD.

Witnesses:

FRANK W. BUTLER, MINNIE G. STANWOOD.

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