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Publication numberUS1093386 A
Publication typeGrant
Publication dateApr 14, 1914
Filing dateNov 13, 1913
Priority dateNov 13, 1913
Publication numberUS 1093386 A, US 1093386A, US-A-1093386, US1093386 A, US1093386A
InventorsJames A Dempsey
Original AssigneeJames A Dempsey
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1093386 A
Abstract  available in
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Description  (OCR text may contain errors)




1,093,386. Patented Apr. 14, 1914.


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Specification of Letters Patent.

Patented Apr. 14:, 1214i.

Application filed November 13, 1913. Serial No. 800,850.

To all whom, it may concern:

Be it known that LJAMns A. DEMPSEY, a citizen of the United States, residing in the city of New York, county of New York, and State of New York, have invented a new and useful Grate-Shaker, of which the following is a specification.

My invention relates to an improvement in grate shakers, especially those adapted to be operated by power, such as steam, electricity, water, air, etc., and more particularly to those adapted to be automatically controlled. It also relates to a device in which the parts may be temporarily disconnected to permit hand operation.

Some of the objects of my invention are to provide a device capable of-installation upon existing structures such as heating furnaces, boilers or other structures employing grates which require to be shaken, raked, sliced, etc.

Another object of my invention is to provide an automatic device whereby the grate may be shaken automatically as by the act of opening the fire door for replenishing coal or other fuel supply; another object of my invention is to provide means for quickly and easily performing the opera tions indicated with a minimum of manual labor and the maximum of efficiency.

My invention also insures economy of fuel, time and labor with better results and also provides means for adjustment so that the operation of the shaking apparatus may be regulated at will.

I obtain these objects by the mechanism in the accompanying drawing in which- Figure 1 is a front elevation of the furnace to which my device is attached, and the device itself. Fig. 2 is a side elevation of the device attached to the front of such furnace seen from the line X-Y. Fig. 3 is a side elevation of a part of the apparatus particularly comprising a dash pot for automatically regulating the operation of the whole, seen from the line Z'W. Fig. a is a detail of the apparatus showing a portion moved back out of normal position to permit hand operation.

Similar symbols refer to similar parts throughout.

Attached to the front of the furnace 1 is a motor which in the case. illustrated is shown in the preferred form of a steam or air cylinder 2 which in such case is provided with the usual valve 3; the piston rod i is prolonged and slides in the bearings 5, the connecting rod 6 is coupled to the cross head or arm 7, and is connected at the other end to the arm or lever 8 attached to the rock shaft 9 working in the bearings 10, the; levers or arms 11 also secured to the rock shaft 9 are provided with links 12 having coupling heads or sockets 13, adapted to engage the ends of the shaking levers 14, the latter being pivoted at 15. Attached to the shaking levers 14: are the grate bar rods 16 which operate the sections of the grates. Attached to an arm on the piston rod at 17 is the rod 18, its guide 18 sliding 011 the rod 18", the rod 18 is in turn connected to the valve lever 19. 20 is a pipe by which steam, air or other fluid is admitted to the motor, the valve 21 governing the supply of the same. 22 is a dash pot having a by pass 23 and controlling valve 23; the piston rod 2a is connected to a lever 25 secured to the rock shaft 26 rocking in bearings 27 secured in turn to the face of the furnace. Attached to this shaft 26 are arms 28,preferably bent as indicated,one in front of each furnace door 29 and adapted to be engaged by the latter when it is opened. The lever 30, also secured to the rock shaft 26, has connected with it a chain or similar connection 31 lead ing over the pulleys 32, 33, 34 and connected to the valve lever 35 of the valve 21.

Referring now to Fig. i, 36 is a hand lever provided with a socket adapted to engage the head of the shaking lever 14L when the link 12 and socket 13 are thrown back out of connection with the rocking lever 14, so that the furnace may be shaken by hand if desired at any time.

The operation of the device is as follows :-lVhen it is desired to shake the grate, the motor 2 may be operated by opening the valve 21, either by hand as by pulling on the chain 31, or it may be automatically operated by opening the doors 29 as for the purpose of stoking the furnace, in which case the door 29 engages the arm 28 as it is opened, rocking the same and thus the shaft 26, the arm 30 is consequently raised and this, by means of the chain 31, opens the valve 21. Steam or other motive power is thus allowed to actuate the motor 2, the piston rod 4 is successively raised and lowered in the well known manner, the rock shaft 9 rocked, and the shaker arms 14- reciprocated by means of the connecting links etc., 1213,this motion results in the operation of the grates through the connecting grate rods 16. \Vhen the shaft 26 is rocked as above explained, the piston in the dash pct 22 is raised in the cylinder against the resistance of the fluid therein which passes through the by pass 23, and the operation of the dash pot, and therefore the period of operation of the whole device may be regulated by the valve 23 in the by pass. At the completion of the act of stoking or whenever the doors 29 are closed the weight of the piston in the cylinder 22 causes it to fall, thus rotating the shaft 26, the arm 30, and so permitting the valve 21 to close and shut off the actuating fluid to the motor. Should for any reason it be desired to shake the grates by hand the links and sockets 12 and 13 are thrown back out of the way. The hand bar 36 is placed over the shaking lever 14: and the usual and well known operation is performed. It will be understood that either grate alone may be shaken either automatically or by hand by disconnecting the other grate, by turning back its links 1213.

It will be understood that I do not limit myself to the particular proportions or exact arrangement illustratedfas I have merely shown a preferred form of my invention which extends to the use of any operating motor such as one actuated by air,

.steam, water, electricity, etc, nor do I limit myself to the particular form of dash pot or controlling device, as any automatic resistance capable of controlling the motive power of the shaker is included in my inven-' ,tion; but

connected; a shaking lever connected to the grates of the furnace; adjustable connecting means intermediate the rock shaft and shaking lever; means for actuating the motor by the opening of the furnace door; and means for automatically terminating the operation of the motor.

5. The combination with a furnace, of a motor connected to the furnace grate; means for disconnecting the motor from the grate at will; means engaging the furnace door adapted to actuate th motor by the act of opening the door; means connected with. said actuating means for automatically terminating the operation of the motor.

6. The combination with a furnace, of a motor connected to a rock shaft; members connecting the rock shaft to the furnace grate; a second rock shaft provided with a member engaging the furnace door; means connected to said second rock shaft adapted to actuate the motor when the furnace door is opened; adjustable means connected with said actuating means for automatically terminating the operation of the motor.

7 The combination with a furnace, of means. for operating the furnace grates, and means for automatically controlling said operating means; th controlling means being adapted to be actuated by the opening of the furnace door.



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

Washington, D. C.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US4479605 *Apr 23, 1981Oct 30, 1984Patrick ShiveHeating system
U.S. Classification126/169
Cooperative ClassificationF23H9/00