US1206207A

US1206207A - Incubator-alarm.

Info

Publication number: US1206207A
Application number: US5244815A
Authority: US
Inventors: Alvia R Cox
Original assignee: Individual
Current assignee: Individual
Priority date: 1915-09-24
Filing date: 1915-09-24
Publication date: 1916-11-28
Anticipated expiration: 1933-11-28

Description

A. R. CUX.

INCUBATOR ALARM.

APPUCATION FILED SEPT.24, m5.

1 06,297 "Patented Nov. 28, 1916.

10 D 4 a x 71 if j Z 4&2 Z5 5 5 2 W 7 wltnesses inventor M by @XWQMQJL W ALVIA R. COX, 0F ADA, GXLAHOMA.

INCUBATOR-ALARM.

Application filed fieptember 2 1, 1915.

To all whom it may concern Be it known that I, Ali-VIA E. Cox, a citizen of the United States, residing at Ada, in the county of Pontotoc and State of Oklahoma, have invented a new and useful Incubator-Alarn'i, of which the following is a specification.

The present invention is an incubator alarm, and aims to provide an attachment for incubators which is operable to give an alarm signal when the temperature of the incubator rises and lowers to an abnormal or dangerous degree.

It is the object of the invention to pro vide an incubator alarm having novel means for controlling an electrical circuit having a hell or other signal interposed therein, whereby the circuit will be closed upon an abnormal change in temperature of the incubator, so that the attendant can look after the incubator, especially if the signal is continued, which would indicate a continuation of the abnormal temperature.

It is also within the scope of the invention to provide a device of the nature indicated which may be readily attached to various incubators, and which is comparatively simple and inexpensive in construction, as well as being practical and eiiicient in use.

Vith the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangement of parts and in the details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed can be made within the scope of what is claimed without departing from the spirit of the invention.

The invention is illustrated in the accompanying drawing, wherein:

Figure 1 is a tragmental view of an incubator illustrating the thermostat and parts operated thereby and also illustrating the attachment applied to the incubator. Fig. 2 is an enlarged vertical section of the attachment, parts being broken away, parts being illustrated in elevation, and the electrical circuit being illustrated diagrammatt cally. Fig. 3 is a horizontal section of the device taken on the line 33 of Fig. .2. Fig. t is ele ation of the device, .iens

Specification of Letters Patent.

Patented Nov. 28, 1916.

Serial No. 52,448.

ing broken away. Fig. 5 is a sectional detail taken on the line 5-5 of Fig. 2.

The incubator illustrated which may be taken. as typical, comprises a casing 1 which is heated by a suitable heater 2, the amount of heat supplied to the interior of the casing 1 eing controlled by a damper 3 carried by a lever t which lever is connected by a link or red 5 to the wafer thermostat 6 mounted within the casing 1.

Tie present attachment embodies a tubular casing 7 adapted to be set on end on the top of the casing 1 adjacent the rod 5, and having a pair of diametrically opposite longitudinal or vertical slots 8. A. cap 9 is threaded upon the upper end of the casing 7, and the lower end of the casing has a base or outturned flange 10 secured by means of screws or in any other suitable manner upon the top of the casing 1.

In applying the attachment to the incubator, a tubular bushing 11 is slipped downwardly through a bore 12 drilled in the top of the casing, the upper end of the bushing or sleeve 12 having an outturned flange 1t seating upon or embedded within the upper surface of the casing to support the bushing. The casing 7 is secured upon the incubator casing over the bushing 12, which also serves to hold said bushing in place.

A vertical slidable rod or spindle 13 is slidable through the bushing 11 and through the apertures 15 and 16 formed in the lower .end or bottom of: the casing 7 and in the cap said strips or arms have curved portions aria o embracing the casing at the upper and lower ends of the slots 8, said portions 2% extending through arcs of over 180 degrees so as to hold their places upon the casing 7. The portions 2% can readily be slipped onto the 7 before the 9 is applied, and the 1 portions 2% have a contractive tension so to tightly embrace the casing 7. The upper and lower ends of the plate 22 are secured to the arms 23 by means of bolts 26 engaged through said plate and arms, and having nuts 27 threaded thereon. Insulating washers 28 are disposed between the nuts 27 and the arms 23, and insulating washers 29 are dispcsed upon the bolts 26 between the plate 22 and arms 23, whereby the plate 22 is insulated from the arms 23 and casing 7.

A vertical guide 30 is disposed adjacent that side of the plate 22 opposite the arms 23 and is parallel with and spaced from the plate 22, the upper and lower ends of the guide 30 being ofiset being en aged with the bolts under the heads thereof. insulating washers 32 are disposed between the ofiset ends 31 of the guide 30 and the ends of the plate 22, whereby the guide 30 as wellas the plate 22 is insulated from the casing 7.

That upright edge of the plate 22 remote from the casing 7 is provided with an angularly extending flange provided with a vertical or longitudinal slot 3%, and the "lange 33 has an angularly' extending lip 34 at its free edge. A pair of contact plates 35 fit slid-ably against the flange 33, and certain edges of the plates 35 project beyond the plate while the opposite edges of the contact plates 35 engage the lip r to pre: vent the plates 35 from rotating. Bolts 36 are engaged through the plates 35 and work within the slot 34, and nuts 37 are threaded upon the bolts 36 for clamping the plates 35 in their adjusted positions. A washer 38 is mounted upon one of the bolts 36 between the nut 37 and the respective plate 35, and the other terminal of the circuit 19is clamped between the washer 38 and the respective nut 37.

As a means for controlling the electrical circuit by the movement of the spindle or rod 1%, a collar 39 is mounted upon the spindle lswithin the casing 7' and is adjustably clamped in place by means of a set screw all carried by the collar and impinging against the spindle. A switch member or finger i2 is threaded into the collar 31-) diametrically opposite the set screw 4:1 and works within one of the slots 8, while the set screw 41 works within the other slot. The finger 42 projects between the plate 22 and guide 30 so as to be guided for vertical movement, and the finger 42 projects between the adjacent ends of the Contact plates 35. V The adjacent corners of said contact plates are rounded, as at 35*, for the engage-V ment of the finger 4.2. The finger l2-is normally between and spaced from the plates 35, so as to open the electrical circuit,land when the spindle ii is moved to bring the finger 42 against one or the other of the plates 35, the electrical circuit is closed, cur

toward the

plate

22 and 7 stat 6, so that the upward movement of the.

thermostat will raise the rod or spindle 1e, while the lowering of the thermostat permits the rod or spindle 14 to gravitate or move downwardly of itself.

In use, the collar 39 is adjusted to the .proper position upon the spindle 14 by loosening the set screw 41 and when the collar is properly adjusted, the set screw is tightened for holding the collar in place. The contact plates 35 are'also properly adjusted so that a predetermined upward or downward movement of the finger 42 will result in the closing of the electrical circuit, it being noted that the plates 35 may be ad. justed to various distances apart. Normally, the finger d2 stands between the contact plates 35, so that the electrical circuit is broken. Should the temperature of the incubator rise or lower to a predetermined abnormal or dangerous degree, the spindle 14 will be moved with the thermostat '6, and

this will bring the finger 4C2 againstgone or the other of the contact plates 35, resulting in the closing of the electrical circuit as above indicated. The hell or signal 21 will therefore be operated to give an alarm. Should the temperature be restored to normal, the spindleor rod 14 will be, moved to normal position so as to open the electrical V circuit, whereby the bell will stop ringing,

thus indicating to the operator or attendant that the abnormal temperature has been rectiiied. .However, if the alarm is continued, the attendant will know that the abnormal temperature of the incubator has notbeen corrected by the usual temperature controlling means and the attendant may then look after the incubator to restore normal conditions. 2

The present device is comparatively simple and inexpensive in construction, and 7 may be installed upon various incubators for giving a warning "should the temperature rise or lower to a predetermined or dangerous degree.

Having-thus described the invention, what is claimed as new is:

1. In a device of the character described,

a casing having means for attachment to an incubator and having a longitudinal slot,

a rod slidable within the casingand proj ecting from one end thereof, the projecting portion o'fthe rod having means for engage: ment wIth a thermostat, an insulated plate attached to the casing and disposed at one side thereof, a pair of contact members adjustably carried by said plate, and a switch member carried by said rod and projecting through said slot between said contact members to move against them for closing an electrical circuit.

2-. In a device of the character described, a casing, a rod slidable therethrough, an insulated plate carried by the casing and having an angularly extending flange provided with a longitudinal slot and an angularly extending lip, a pair of contact plates bearing against said flange, certain edges of said contact plates projecting beyond said plate and the opposite edges of the contact plates bearing against said lip, bolts engaged through said contact plates and working in said slot, and a switch member carried by the rod and projecting between said contact plates to contact therewith.

S. In a device of the character described, a tubular casing having an aperture at one end and a longitudinal slot, an apertured cap threaded upon the other end of the casing, a rod slidable through the apertures of the casing and cap, an adjustable collar carried by the rod within the casing, a contact finger carried by said collar and working in said slot, a pair of arms having curved portions embracing the casing adjacent the ends of said slot, and an insulated plate carried by said arms and having a pair of contacts between which said finger projects.

at. in a device of the character described, a tubular casing having an aperture at one end and a longitudinal slot, an apertured cap threaded upon the other end of the casing, a rod slidable through the apertures 01" the casing and cap, an adjustable collar carried by the rod within the casing, a contact finger carried by said collar and working in said slot, a pair of arms having curved portions embracing the casing adjacent the ends of said slot, an insulated plate having an angularly extending flange provided with a slot, bolts engaged through said plate and arms, a guide parallel with the plate having ofiset ends engaging said bolts, a pair of contact plates bearing against the said flange, and bolts engaged through said contact plates and working in said slot of the flange, the contact finger projecting between said first mentioned plate and guide and between the contact plates.

In testimony that I claim the foregoing as my own, I have hereto affixed my signature in the presence of two witnesses.

ALVIA R. COX.

Witnesses:

W. A. ALEXANDER, JNO. H. JoNEs.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C.