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Publication numberUS357722 A
Publication typeGrant
Publication dateFeb 15, 1887
Publication numberUS 357722 A, US 357722A, US-A-357722, US357722 A, US357722A
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Automatic damper mechanism
US 357722 A
Abstract  available in
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Claims  available in
Description  (OCR text may contain errors)

(No Model.)

, E: o. MASON.


No. 357.722. Patented Feb. 15, 1887.




SPECIFICATION forming part of Letters Patent No. 357,722, dated February 15, 1887.

Application filed August 26, 1886. Serial No. 211,936. (No model.)

To all whom it may concern;

Be it known that I, EDWIN 0. Mason, a citizen of the United States, residing at the city of Madison, in the county of Dane and State of Wisconsin, have invented a new and useful Alarm-Clock Attachment for Opening the Drafts of Furnaces and Stoves, of which the following is a specification.

My invention relates to attachments to time alarm-clocks for opening the dampers or doors of furnaces or stoves; and the object of my invention is to cause the movement of a timeclock in striking to open the dampers or doors of furnaces or stoves without changing in any manner whatever the construction of such clock as made and used for other purposes, except the removal of the bell therefrom. I attain this object by the mechanism illustrated in the accompanying drawings, in which Figure l is a front view. Fig. 2 is an end view.

Similar letters refer to similar parts. in the two views and detached parts.

To construct my attachment and place the clock for operating the same, I take an ordinary cylindrical metal case alarmclock, A, which for the time being may be removed from its ordinary location and place thesame, without fastening, but with the bell displaced, upon the shelf B, permanently attached at a point convenient for operating the damper or door of the furnace or stove. The clock is placed near the left-hand end of the shelf. To the back edge of the shelf B, I attach the standard 0, extending some distance above the clock A. To the lower part of this standard, near its right-hand end, I attachthe right-hand end of the lever D by the fulcrum-pin E. Abovethe lever D, I place the lever F, attached near the left-hand end of the standard G by the ful crum-pin G in such a position that the lever D, when raised, will throw upward the righthand end of said lever F. Above the lever F, attached by its right-hand end to the righthand end of the standard 0 by the fulcrum-pin I, I place the lever H in such a position that when raised by the levers D and F its lefthand end will be thrown upward. In front of said levers, upon the shelf B, in the rear of cruurpiu I, a hook, 0, from the shank of which the wire S extends upward to and over the pulley Q, and downward to the weight It, whence it passes over a second pulley, T, to the point of attachment to the damper or door of the furnace or stove, and the same or other wires may connect to and operate different openings or drafts. My attachment being so constructed and the alarm-clock being so placed, I set the clock so as to strike its alarm at any desired time. \Vhen the hammer N strikes the front end of the lever M, moving it to the right and the back end to the left, releasing the levers H, F, and D, the weight R falls to the shelf B, operating the openings to which the wire S is attached, the hook O slipping upward upon the lever D. a

I am aware that prior to my invention clocks have been constructed and used so as to open door-drafts or dampers of stoves or furnaces. I therefore do not claim such a combination, broadly; but I am not aware that such attachments have been constructed so as to be operated by the ordinary alarm-clock without any alteration of the same, and by the mere placing such clock contiguous thereto. A

That I claim as .my invention, and desire to secure by Letters Patent, is-

l. lhe combination of the levers D F H M, the hook O, the wire S, and weight Itwith the hammer N of an alarm-clock, substantially as described.

2. The series of levers M H F D, in combination with the hammer N of an alarm-clock,

substantially as set forth.

EDWIN G. MASON. Witnesses:


Cooperative ClassificationG04F3/027