Патент USA US2110340код для вставки
March 8, 1938. F. RILEY, JR‘ ' ALARM DEVICE ' ‘2,110,340 ' Filed Aug. 17, 1936 15"" ' [5 %§ , Patented Mar. s, 1938 2,110,340 UNITED STATES PATENT OFFICE 2,110,340 ALARM DEVICE Frank Riley, Jr., Houston, Tex., assignor to Miller Fuel Engineering Company, Houston, Tex., a corporation of Texas Application August 17, 1936, Serial No. 96,431 1 Claim. (Cl. 116—102) This invention relates to an alarm device. An object of the invention is to provide a device of the character described specially designed to be attached to a boiler, and arranged to be actu5 ated when‘ the level of the water in the boiler is below a predetermined level; it being the purpose of the invention to give warning to the attendant that the water in the boiler is too low. It is another object of the invention to provide 10 an alarm device equipped with trip means arranged to be released by the in?uence of the‘ steam in the boiler when the water reaches a predetermined level with an actuating device ar- ranged to be rendered operative upon release of 15 the trip means, and to thereupon actuate the alarm. With the above and other objects in view, the invention has particular relation to certain novel features of construction, operation and arrange20 ment of parts, an example of which is given in this speci?cation and illustrated in the accompanying drawing, wherein: I Figure 1 shows a side view of the apparatus attached to the boiler, and 25 Figure 2 shows a sectional view thereof taken on the line 2—2 of Figure 1. Referring nowmore particularly to the drawing wherein like numerals of reference designate similar parts in each of the ?gures, the numeral 30 l designates the boiler. otally connected to the latch out beyond its piv otal connection with the lug ll. There is a steam pipe I8 extended axially through the nipple 3 and whose outer end is up turned and connected into the lower end of the 5 nipple 4. The inner end of this steam pipe [8 is also upwardly curved so that its inlet end will be above the corresponding end of the nipple 3. So long as the level of the water in the boiler is above the nipple 3, dry steam will be excluded 10 from the tube l3 and said tube will not be thereby expanded in length su?icient to trip the latch l2. However, as soon as the water level descends sul? ciently to admit steam into the nipple 3, said steam will pass also into the tube l3 and will 15 heat and expand said tube, causing an upward 101111 On the rod "5- ThiS upward pull will actu ate the latch l2 outwardly, releasing the free end of the lever ll permitting the weight 9 to- drop, thus opening the valve 5. The inner end of the 20 steam pipe '8 being upturned, Only dry steam will be admitted to the whistle 6 and when the valve is opened, an alarm will be given, indicating the low level of the water in the boiler. The inner end of the steam pipe “3 being upturned W111 Pre- 25 vent the discharge of water through the whistle 6, but Will Permit dry Steam Only to reach Said Whistle The drawing and description disclose What is ‘There is a T-connection now considered 130v be a preferred form 0f the in- 30 2 which is connected into the boiler below the normal water level by means of the tubular nipple 3, and connected into and upstanding from the corresponding end of the T-connection 2, there 35 is a tubular nipple 4 which is normally closed by vention, by Way Of illustration Only, while the broad principle of the invention will be de?ned by the appended Claim What I Claim is: A device of the character described comprising 35 a conventional valve 5 and on which, above the valve, there is mounted the conventional steam whistle 6. The valve 5 may be opened by the valve actuating lever ‘l which is pivotally mount40 ed thereon in the usual way. A chain 8 is at- a T-shaped tubular support mounted on the side of and adapted to be connected into a boiler, a steam whistle on one arm of said T-shaped tubu lar support, a steam pipe extended horizontally through the support into the boiler and arranged 40 tached at one end to the free end of the lever l ‘to supply steam to the whistle, said steam pipe and said chain is connected at its other end to the weight 9. This weight has a bail I 8 to receive the supporting lever II. This lever is piv45 oted at one end to the lower end of the T-connection 2 and its other end is engaged by the de- having the end thereof which is in the boiler up turned, a normally closed valve controlling the supply of steam from the steam pipe to the whistle, a weight fastened on the lower end of 45 said T-shaped support, releasable means normally pending pivotally mounted latch [2 whereby the weight is normally held in inactive position. Upstanding from the other end of the T-con50 nection 2, there is an elongated tube l3 whose holding the weight inactive, means connecting the weight with the valve, means mounted on the other arm of said support, arranged to be actu ated by the steam from the boiler when the water 50 upper end is closed by the cap M. The cap M has a laterally extended lug IE to which the upper end of the release rod [6 is connected. The upper end of the latch is pivoted to 2. lat55 erally extended lug I‘! carried by the T-connection 2, and the lower end of the release rod I6 is piv- in the boiler reaches a predetermined low level and e?‘ective to release the weight suspending means whereby the weight is rendered active to open the valve to permit the discharge of steam through said steam pipe. 55 FRANK RILEY, JR.