US1231706A - Time-controlled draft-regulating device. - Google Patents

Description

C. H. CARROLL. TIME CONTROLLED DRjAfI REGULATING DEVICE.

APPLICATION mm OCT. 21.

Patented July 3 a mw.

CARL H. CARROLL, OF WEST SOMERVILLE, MASSACHUSETTS.

TIME-CONTROLLED DRAFT-REGULATING DEVICE.

Application filed October 21, 1913.

To all whom it may concern:

Be it known that I, CARL H. CARROLL, citizen of the United States, residing at West Somerville, in the county of Middlesex and State of Massachusetts, have invented certain new and useful Improvements in Time- Controlled Draft-Regulating Devices; and I do hereby declare the following to be a full, clear, and exact description of the lnventlon, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to time controlled, draft regulating devices for stoves and furnaces, which may be set in conditlon to allow the draft to be closed, and which will act to open the draft at a predetermined time.

The object of the invention is to produce a device of this character which is simple in construction and reliable in operation, and which may be set up and connected with the draftcontrolling mechanism of the stove or furnace by one whohas very little mechanicalskill.

With this object in view the invention comprises certain novel and improved constructions, arrangements and combinations of parts, the advantages of which will be obvious to those skilled in the art from the following description.

In the accompanying drawings illustrating a time controlled draft regulating device embodying the various features of the invention in their preferred forms, Figure 1. is a view in front elevation of the device showing the same connected with the lower door of a furnace; Fig. 2 is a detail view, partly in section, illustrating particularly the devices for supporting the draft operating lever, showing the position of the parts when the lever is supported in position to allow the draft to be closed; Fig. 3 is a View similar to Fig. 2, showing the positions which the parts assume when the draft operating lever is released; and Fig. 4 is a detail view showing the construction of the outer end of the spool which is mounted on the end of the draft operating 'lever and of the adjacent parts.

The draft operatingdevice illustrated in the drawings comprises a supporting frame indicated at 1, which is adapted tosupport all the parts of the device, and which may be placed in any desiredpositionwith relation to the heater so that the device may be Specification of Letters Patent.

lPatented July 3, 1917. Serial No. 796,473.

connected with the draft controlling mechanism of the heater. Pivoted at 2 upon this supporting frame is a draft operating lever 3, to one end of which is attached a flexible connector 4 having a snap 5 at its lower end by which the connector 4 may be connected with the draft controlling means of the heater. The lever 3 and the flexible connec tor 4 are arranged and connected with the draft controlling means, so that when the lever occupies the position illustrated in F ig. l, the draft of the heater may be closed, and when the lever is swung from the position illustrated in full lines in Fig. 1 to the posit1on illustrated in dotted lines in said figure, the draft controlling means will be operated to open the draft. As illustrated in the drawings, the flexible member 4 is attached at its lower end to the front door 6 of a furnace, which door is located below the firebox or grate. As shown in Fig. 1, the swinging movement of the lever 3 from full line to dotted line position swings the door 6 of the furnace outwardly, as clearly shown in said figure, so as to allow the air to be drawn up through the firebox. A tension coiled spring 7 is attached at its upper endto one end of the lever 3, and at its lower end to the frame 1, and acts to swing the lever 3 from full line to dotted line position. I

When the device is set the lever 3 is sup ported in the full line position, Fig. 1. In order that the lever may be released from such position and allowed to be actuated by the spring 7 to open the draft of the heater at a predetermined time, the mecha nism for supporting the lever is connected with the alarm mechanism of an alarm clock, so that the lever is released when the alarm goes 0E. The alarm clock is indicated at 8, and is mounted in a compartment at the upper portion of the frame 1, and rests upon the transverse shelf 9. T he alarm clock is one of ordinary construction, of which the winding key attached to the end of the arbor connected with the mainspring of the-= time keeping mechanism is indicated at 10, the hand nut secured tothe end of the set ting shaft at 11, the alarm setting dial at 12, and the alarm winding arbor which is connected with the mai-nspring of the alarm mechanism at 13. A- stud 14 is secured to the end of the alarm winding arbor at the back of the clock, and an arm 15 pivoted to the stud 1a is arranged to support thelever 3 in its full line position, Fig. 1. The stu 14 is slotted at its forward end to form two arms 16 and 17, and the arm 15 is slabbcd off on each side to form an arm 18 which is received in the slot between the arms 10 and 17, and the arm 15 is pivoted to the stud 14 by means of a pivot pin 19. The outer ends of the arms 16 and 17 are rounded off on one side, as indicated at 20, and the inner end of the arm 18 is rounded off on the same side as at 21, so as to allow the arm 15 to turn at an angle to the stud 14 to the side 011 which the arms are rounded off, as shown in Fig. 3. On the opposite side the arms 16 and 17 present abrupt shoulders for engagement with the shoulders 22 on the arm 15, and the end of the arm 18 presents an abrupt shoulder for engagement with the end face of the slot between the arms 16 and 17, so that the arm 15 is prevented from swinging to that side of the stud. This construction forms what may be termed a one-way hinge connection between the arm 15 and the stud 14, the arm being free to swing from a position in line with the stud in one direction only with relation to the stud. The arm 15 is provided with a recess 23 to receive the lever 3.

In setting the device so that it will operate the draft controlling means of the stove or furnace to open the draft at a predetermined time, the alarm is set to go off at the time when it is desired that the draft be opened, and the alarm is wound by turning the stud 14. The operator at the end of the winding operation positions the stud 14 and arm 15 so that the arm will not swing downwardly with relation to the stud, but will be supported in alinement with the stud, as shown in Fig. 2. The draft operating lever 3 is then swung about its pivot to raise the lefthand end thereof (Fig. 1), and when the lever strikes the lower side of the arm 15 the arm will swing upwardly to allow the lever to pass. When the left-hand end of the lever is swung past the arm, the arm will drop down beneath it, and the lever is then allowed to rest in the recess 23 in the arm so that it will be supported in the full line position, Fig. 1, by the arm. The connector 4 is then connected with the door beneath the grate, or with any other draft controlling member of the heater which is set in position to close the draft. This completes the setting of the device.

When the device has been set, as above described, and the alarm goes off, the winding arbor 13 is turned by the action of the alarm mechanism spring until the stud 14 and arm 15 reach positions such that the arm can swing downwardly or in the direction of the action of the spring 7. When the parts reach these positions, the arm 15 swings at an angle to the stud 14, releasing the lever 3, which is then actuated by the spring 7 to open the draft of the heater.

To enable the length of the connector 4between the lever and the end thereof which is connected with the draft controlling means of the heater to be adjusted, a spool 24 is mounted for rotary adjustment on the end of the lever 3, and the connector 4 is attached at one end to said spool. In orderto hold the spool 24 in adjusted position, a transverse pin 25 is secured in the end of the lever 3, and is arranged to be engaged in either of the grooves 26 formed in the outer end of the spool 24. A. spring 27 coiled about the lever 3 is secured at one end to the lever, and at the other end bears against the spool 24, thereby holding the spool in position with the pin 25 engaged firmly and securely in one of the grooves 26. The provision for adjustment of the length of the connector 4-enables the device to be more conveniently connected in operative relation with the draft controlling means of the heater, and also enables the extent to which the draft is opened by the device to be varied readily. It will be noted that the de-' vice above described is simple and compact in structure, is composed of few parts so that it is not liable to get out of order, is self contained and may be set up in connection with the heater merely by placing the device in a convenient position with relation to the draft controlling means of the heater, attaching the connector 4 to the draft controlling means, and adjusting the spool 24 to ive the proper length to the connector 4. flaving explained the nature and object of the invention, and having specifically described a device embodying the same in its preferred form, what is claimed is 1. A time controlled draft regulating device for stoves and furnaces, having, in combination, a draft controlling device, a movable member for operating the draft controlling device to open the draft, a rotary stud, an arm pivoted to the stud to turn relative thereto and arranged to support the movable member so'as to allow the draft controlling device to be closed in one position of the stud and to swing about its pivot and release said member when the stud is rotated from such position, a clock, means controlled by the clock mechanism for rotating the stud at a predetermined time, and means for actuating the movable member to open the draft controlling device upon its release.

2. A time controlled draft regulating device for stoves and furnaces, having, in combination, a draft controlling device, a lever for operating the draft controlling device to-open the draft, a rotary stud, an arm pivoted to the stud to turn relative thereto and arranged to support the lever so as to allow the draft controlling device to be swingabout its pivot and release said lever when the stud is rotated from such position, a clock, means controlled by the clock mechanism for rotating the stud from such position to release the lever at a predetermined time, and means for swinging the lever in a direction to open the draft controlling device upon its release.

3. A time controlled draft regulating device for stoves and furnaces, having, in combination, a draft controlling device, a lever for operating the draft controlling device, an alarm clock, a stud connected with the winding arbor of the alarm mechanism, a lever supporting arm pivoted to said stud to turn relative thereto and arranged to support the lever so as to allow the draft controlling device to be closed in one position of the arbor and to swing at an angle to the stud to release the lever when the arbor rotates part of a revolution from. such position, and means acting on the lever to swing it in a direction to open the draft controlling device upon its release by said arm.

4c. A time controlled draft regulating device for stoves and furnaces, having, in combination, a draft controlling device, a movable member for operating the draft controlling device, a rotary stud, an arm for supportin said movable member so as to allow the draft controlling device to be closed pivoted to the stud upon an axis transverse to the axis of the stud and arranged to swing in one direction only from a position substantially in alinement with the stud whereby said arm is enabled to support said member in one position of the stud and swing at an angle to the stud to release said member when the stud is rotated a part of a revolution from such position, a clock, means controlled by the clock mechanism for rotating the stud from such position at a predetermined time, and means acting on said movable member to move it in a direction to open the draft controlling device upon its release by said arm.

5. A draft controlling device for stoves and furnaces, having, in combination, a

supporting frame comprising side plates, transverse plates connecting the side plates, and a transverse shelf extending across the upper portion of the frame between the side plates and forming a compartment above the shelf, an alarm clock mounted within the compartment on the shelf with its rear face substantially perpendicular to the plates and shelf, a lever for operating the draft controlling device pivoted to the frame to swing in a plane adjacent to and substantially parallel with the rear face of the clock, an arm carried by the alarm winding arbor arranged to project across the plane of movement of the lever to support the lever and to be actuated to release the lever when the alarm goes off, and means for swinging the lever to operate the draft controlling device to open the draft when the lever is released.

6. A draft controlling device for stoves and furnaces, having, in combination, a supporting frame comprising side plates, transverse plates connecting the side plates, a transverse shelf extending across the upper portion of the frame, an alarm clock mounted on the shelf, a lever for operating the draft controlling device pivoted to swing in a plane adjacent to and substantially parallel with the rear face of the clock, a stud secured to the rear end of the alarm winding arbor, an arm pivoted to the stud on an axis transverse to the aXis of the stud, devices for holding the arm in sub stantial alinement with the stud so as to support the lever in one position of the stud arranged to permit the arm to swing at an angle to the stud to release the lever when the stud is rotated part of a revolution from said position, and means for swinging the lever to operate the draft controlling device to open the draft upon the release of the lever.

CAR-L H. CARROLL.

Witnesses:

BURTON W. CARY, C. M. SINOERBEAUX.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. 0.

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