US620487A - mcfetridge - Google Patents

Description

No. 620,487. Patented Feb. 28, |899. G. A. McFETRIDGE.

INCUBATOR. (Application led Mar. 7,1898.) (No Model.) 2 Sheets-$heet l.

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G. A. MCFETRIDGE.

| N C U B A T 0 R (Application led Mar. 7, 1898.)

2 Sheets-Sheet 2.

(N0 Model.)

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I UNITED STATES PATENT OFFICE.v

GEORGE A. MCFETRIDGE, OF BOUND BROOK, NEW JERSEY, ASSIGNOR TO THE STAR INCUBATOR AND BROODER COMPANY, OF SAME PLACE.

INCUBATOR.

l SPECIFICATION forming* part of l Letters r:Pa-.tent N0. 620,487, dated February 28, 1899.

Application filed March 7, 1898. Serial No- 672,958. (No model.)

To all whom, it may concern:

Beit known that LGEORGE A.MCFETR1DGE, a citizen of the United States, residing at Bound Brook, in the county of Somerset and State of New Jersey, have invented new and useful Improvements in Incubators, of which the following is a specification.

My invention relates to incubators, and has for its object certain improvements in the incubator shown and `described in my application iiled May 13, 1896, Serial No. 591,413. In my said application I have shown a machine having a direct lire-flue at one end and an indirect fire-flue connected therewith and extending to a point near the opposite end, where the products of combustion discharge into the tank above the egg-chamber. An indirect passage for the products of combustion is afforded by means of pipes in said tank at each side of the machine havingl their open ends located in the opposite end of the tank to that at which the products of combustion are discharged and terminating in their opposite ends in stand-pipes extending upward through the top of the incubator, through which the products of combustion escape from the machine. v An air-flue is provided which surrounds the direct fire-flue, and an air-inlet is provided in the end of the machine, which communicates with said air-flue.

It is the object of the present invention to provide improved means for increasing or diminishing the rapidity of circulation of the products of combustion.

In the accompanying drawings, illustrating my invention, Figure 1 is a sectional plan view. Fig. 2 is a transverse vertical sectional view on the line 2 2 of Fig. 1, and Fig. 3 is a central vertical section on the line 33 of Fig. 1. Fig. 4t is a sectional view of a detail.

The numeral 1 indicates the incubator-casing, which may be of the usual or any preferred construction and incloses an egg-chamber 2 and a heat-chamber 3, the two chambers being separated by a diaphragm 4. In the end wall of the incubator I provide a direct fire-nue 5, which extends through the incubator from top to bottom and at its upper or outlet end is provided with a damper 6, controlled by a thermostatic bar 7 of the general construction of and composed of the materials described with reference to the thermostatic bar shown in my. application above mentioned. Connected to and communicating with the direct iire-{iue 5 is an indirect lire-flue 8, which extends at right angles tov vsaid direct fire-flue across the heat-chamber cate with the heat-chamber atvthe end of said chamber opposite that at which the products of combustion discharge therein from the indirect re-iiue 8. Near the opposite or closed ends of said ducts 10 10 I provide the escapelues 12 l2, one for each duct, which iiues eX- tend vertically upward through the top of the incubator. The manner of arranging these escape-fines is as follows: The outlet-ducts 10 are rectangular in shape, as shown inFig. 2, and at a point near its closed end each duct is'provided with an opening 13 in its upper side, which is adapted to receive an escape- Hue 12. The escape-fines 12 are capable of vertical adjustment in said openings-that is, they may be raised or lowered; but the openings 13 13 and the openings in the top of the incubator through which these escape-dues pass iit said tubes sufficiently close to hold them in any adjusted position, as clearly showninFig.4-. Byprovidingtheseadjustable escape-ii ues I can increase or diminish the rapidity of circulation of the products of combustion at will. Thus if the end of the eggchamber opposite the lamp should be found for any reason to receive less heat than the lamp end of said chamber this defect can be remedied by raising the escape-dues 12, so that their lower ends will be near the tops of the outlet-lines 10. This will operate to afford a more ready passage for the escape of `the products of combustion, and hence increase the rapidity of the circulation. If it is desired to decrease the temperature of the end of the egg-chamber opposite the lamp or if for any other reason it is found desirable to diminish the rapidity of the circulation of the products of combustion, I lower the escape-flues 12 in the outlet-ducts 10, thus obstructing, as it were, the circulation. In order that the circulation may not be entirely stopped by pressing the ends of the escapelnes down on the bottoms of the outlet-ducts, I incline or cut away a portion of the bottoms of said escape-dues, as indicated by the numerals 14 14.

The numeral 15 indicates the direct air-ii ue, which surrounds the direct ireiiue 5. Connected to and communicating with the direct air-flue is an indirect air-flue 16, which eX- tends across the heat-chamber and surrounds the indirect fire-due on three sides. Toward its outer end the indirect air-flue 16 communicates with a distributer 16a by means of perforations 17 in the diaphragm 4, which diaphragm constitutes the bottom of said indirect air-flue as well as of the outlet-ducts 10. The distributer 161L in turn communicates with the egg-chamber through the perforations 17% The circulation of the heated fresh air in the egg-chamber is the same as that described in my application above named. In the present case, however, the air after passing out of the egg-chamber through the outlets 18 passes up through the wall of the incubator and discharges through an openin g 19 near the top of the incubator, which is controlled by suitable slides in the ordinary manner.

The numeral 22 indicates the lamp, the chimney 23 of which extends upward in the direct fire-fine 5.

The numerals 20 indicate the air-inlet ports, located one on either side of the lamp, which extend vertically upward in the end Wall of the casing and then inward at right angles to the direct air-flue, with which they communicate. In order to prevent any fumes arising from the lamp passing up these inlet-ports, and thereby being carried into the egg-chamber, the air-inlet ports 2O are continued downward in the form of tubes 21, the lower ends of which are below the plane of the lamp-flame. Any fumes therefore coming from the lamp will rise u pwardand be dissipated by the currents of air in the room Without entering the air-inlet ports.

In the end Wall of the incubator opposite the lamp I provide an opening 24in line with the indirect fire-flue 8, which opening is normally closed by means of a screw-cap 25. By removing this cap access can be had to the interior of the indirect fire-flue for the purpose of removing by means of a suitable implement soot and dust which from time to time collect in said flue. By this means all danger of iire in the iiues is avoided, an even temperature in the egg-chamber is insured, and the cause of bad odor inthe room removed.

By the gentle circulation of heated air in the egg-chamber afforded by my construction of incubator I am enabled to utilize the moisture arising from the eggs, and hence Ihave shown no moisture-pan in connection with the distributer 16, as the practical use of my machine has demonstrated that no artificial moisture is required. Said distributer 16 is in other respects similar to the one described in my application above mentioned, comprising a rectangular metallic casing secured to the end wall of the egg-chamber and to the bottom of diaphragm 4.

Having thus fully described myinvention, what I claim as new, and desire to secure by Letters Patent, is

l. In an incubator, the combination with a heat-chamber of an indirect lire-Hue discharging at one end of saidl heat-chamber, outletducts for the products of combustion communicatin g with said heat-chamber at the opposite end thereof, and escape-lines seated in said outlet-ducts and vertically adjustable therein for the purpose set forth.

2. In an incubator, the combination with outlet-ducts for the products of combustion, of escape-fines, having cut-away lower ends seated in said outlet-ducts and vertically adj ustable therein to increase or diminish the rapidity oi' circulation of the products of com bustion, substantially as described.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

GEORGE A. MCFETRIDGE.

Witnesses:

WM. H. BACHE, LEIGH S. BACHE.

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