US1034261A - Audible signal or annunciator for incubators. - Google Patents

Description

H. R. LIGHTOAP. AUDIBLE SIGNAL OR ANNUNGIATOR FOB. INGUBATOBS.

APPLICATION FILED 0012.11,1911. v

Patented July 30, 1912.

2 SHEETS-91132531.

INVENTOR a. R; LKGHEGM. AUDIBLE S'IGNAL 0B AHHUEGIATQB EOE IBIOUEATOBS.

' APPLIOAIIUE 111.21) 001 .11, 1911.

V. nNYEmToR' WITNESSES ATTO NEYS HARRY RUSSELL LIGHTCAP, 0F GREENEiBURG, Z ENNSYLVANIA.

AUDIBLE SIGNAL OR. ANNUNCIATOE FOR INCUBATORS.

Specification of Letters Patent.

Patented July "1), 13612.

Application filed October 11, 1911. Serial No. 654,188.

To all whom it may concern:

Be it known that I, HARRY RUSSELL LIGHT- car, a citizen of the United States of America, residing at Greensburg, in the county of Allegheny and State of Pennsylvania,

Annunciat-ors for Incubators, of which the following is a specification, reference being had therein to the accompanying-drawing.

This invention relates to an audible signal or annunciator for incubators, and the primary object of my invention is to provide a thcrmalalarm that is positive in its action, durable and applicable to various types of ii'icubators.

Another object of this invention is to provide an audible electric signal that can be adjusted to sound an alarm when the teln- 1 (311117111X? 0t or,l.owcred,'the alarm notifying the attendant of the incubator that the same requires attention to insure a perfect incubation of the contents of the incubator.

A further object of this invention is to provide a portable electric alarm that can be easily placed upon an incubator and connections made for sounding an alarm when there is a change of temperature, the alarm mechanism being arranged in a compact casing that can be easily opened and proper connections made for operation in connection with an incubator.

With the above and other objects in ,view, the invention resides in the novel construc tion, combination and arrangement of parts to be hereinafter specifically described and then claimed.

Reference will now be had to the drawings, wherein Figure 1 is a perspective view of an incubator provided with the alarm, Fig. 2 is an enlarged front elevation of the alarm Fig. 6 i'sf'adetail sectional view of a plug adapted to form part of the alarm inechanism.

. The reference humeral 1 an inhave invented certain new and use-- ful Improvements in Audible Signals or an incubator is slightly raisedcubator. of the ordinary and well known type having a hot air flue 2 beneath which is located a lamp or heating medium 3 of the incubator. Arranged upon. the top of the incubator is a ll-shaped metallic bearing 4 and fulcrumed in said hearing by a pin 5 is a sleeve 6 si pporting a, rod 7. ()nc end of the rod is hook-shaped, as at 8 and provided with a bell or dome 9 directly above the flue 2. The opposite end. of the tulcruined rod 7 has an adjustable counter- I balance weight 10 that is fixed upon said rodby a set screw 11. 1 Resting upon the top of the incubato 1 adjacent to the weighted end oi the rod 7 is a rectangular casing 12 having the front wall 13 thereoiprovided. with an opening 14' that can be closed by a door 15, which is hinged, as at 16 to the edge of the front wall 13. Located within the casing 12 is a battery 17 or other source of electric energy and a conventional. form of electric bell 18. The bell 18 has the binding post 19 thereof connected. by a wire 20 to the binding post 21 of the battery 17, and said battery has the other binding post 22 thereof connected by a wire 23 to a pivoted hook 24 carried'by an end wall of the casing 12. The front wall 13 oft-he casing and the door15 have registering slots providing clearance for the hook124. The other binding post 26 of the bell 18 is connected'by a wire 27 to a binding post- 28 carried by the rear wall of the casing 12, and this binding post is sup ported by a plug socket 29 that extends through the rear wall of the casing 12. The socket 29 is adapted to receive a plug 30 to which is attached a wire 31. opposite end otthe wire 31 is connected by a screw 32 to a clasp 33 that is pivotally connected to one of the side arms of the bearing 4. Secured to the inner side of the door 15 at the hinged edge thereof is a vertical bracket 84 having a longitudinal slot 35, an

openin 3,6 and an arm"37 that extends crosswise of the door to the free edge thereof. Engaging this arm is the hook 24 adapted to place the bracket 34- in the electric circuit of the alarm mechanism, as will presently apt" Adgustably mounted in the brac'imt be by a set screw 38 is any eye The A 39 carried by the upper end of a rod 40 extending through the opening 36 into the bracket. The lower end of the rod 40 is bent to provide a crank 41 upon which is mounted a block 42 having convex upper and lower faces 43. Engaging the cony ex faces 43 are flat springs -14- having the ends thereof secured by screws 45 or other fastening means to the ends of a strap l6 secured, as at 47 to the reduced end 48 of a contact piece 49. The contact piece 49 is loosely mounted upon the crank l1 and the end of said piece is bifurcated or slotted, as at 50 to provide contact arms 51. The contact arms 51- are arranged whereby the rod 7 will extend through the slot 50 and the tilting movement of the rod 7 causes said rod to contact with one of the arms 51.

Assuming that the alarm mechanism is in position for operation, as shown in Figs. 1 and 2, a rise or change in the temperature within the incubator raises or lowers the bell or dome 9, causing the rod 7 to en gage one of the contact arms 51. The contact piece 49 will be slightly moved and immediately restored to its normal position by the springs 44 when the rod 7 is moved out of engagement with the arms 51. By yieldably mounting the contact piece 49 upon the rod 40, a positive contact is assured between said rod and one of the contact pieces, besides the fulcrum of the rod is not strained as though the end of the rod was firmly held by one of the contact pieces. Immediately upon the rod engaging one of the contact pieces, the circuit is as follows: from the binding post 22 by wire 23 to the pivoted hook 24-, through said hook and the arm 37 to the rod 40 Within the bracket 34, through said rod and one of the contact pieces tothe rod 7, through said rod and the bearing 4 to the clasp 33, by wire 31 to the plug 30, binding post 28 by wire 27 to, the binding post 26 of the bell 18, and by wire 20 from the binding post 19 to the binding post 21 of the battery. The bell 18 is. sounded to attract the attention of the attendant of the incubator in order that the attendant can regulate the lamp or heating medium 3 to obtain a proper temperature within the incubator. When the device is not in use, the clasp 33 is detached. also the plug 30, said clasp, plug and wire 23 being placed within the casing 12. The hook 24: is then swung inwardly and the door 15 can be closed. By adjusting the arm 40. the contact piece 49 can be correctly positioned relatively to the rod 7. for instance for obtaining a more positive action when the temperature rises than when the temperature lowers. and vice versa, thisbeing possible by adjusting the rod 40 whereby one of the arms 51 will he in closer proximity to the rod than the other arm.

From the foregoing it will be observed that the thermal. alarm includes a heat actuated rod that is arranged in a normally open circuit adapted to be closed by a movement of said rod to sound an electric hell or other audible signal. The parts of the alarm are compactly arrai'iged and can be disposed of as an attachment for incubators or as a separate alarm device for various purposes.

l Vhat I claim is 1. In a thermal alarm for incubators a casing, a. hinged door carried thereby and adapted to close said casing, a battery arranged in said casing, an audible alarm within said casing, an adjustable contact piece supported by the inner side of said door and normally in an open circuit with said alarm and said battery, and a fulcrumed heatactuated rod extending through the end of said contact piece when said door is open to contact with said contact piece and close said circuit.-

2. In a thermal alarm for incubators, a casing having a hinged door, a battery arranged in said casing, an audible alarm within said casing, an adjust-Mile contact piece supported by the inner side of said door and normally in an open circuit with said alarm and said battery, a fulcrumed heat actuated rod extending through the end of said contact piece when said door is open to contact with said contact piece and close said circuit. and means including a plug carried by the rear wall of said casing and pivoted hook carried by the inner side of one of the end walls of said casing and adapted to control said. circuit.

3. In a thermal alarm for incubators, the combination with afulcrumed heat actuated rod, of a casing, a hinged door carried by said casing, a battery located in said casing, a bell arranged in said casing, an

adjustable and yieldable contact piece supported by the inner side of said door and adapted to be engaged by said rod, and a pivoted hook carried by the inner side of the end wall of said casing and adapted to extend through the front wall of said casing and said door when said door is in an open position to establish in conjunction with the contact piece of said door a normally open circuit between. said bell, battery, rod and contact piece adapted to be closed by a movement of said rod.

4. in a thermal alarm for inciilbators, the combination with a casing, an electrically operated signal arranged within. said casin a hinged door carried by said casing,

I I I an ad ustable contact piece carried by said door, a t'ulcrumed heat actuated rod in a normally open. circuit with said electrically operated signal and adapted to engage said contact piece to close said clrcult to operate pivoted hook carried-by the inner side of the end Wall of said casing and adapted to place said rod and said contact piece in a V normally open circuit with said electrically operated signal.

In testimony whereof I afiix my signature in the presence of two Witnesses.

HARRY RUSSELL LIGI-ITCAP.

Witnesses:

- MAX H. SRoLovrrz,

CHRISTINA T. H001).

Images