US747718A

US747718A - Furnace.

Info

Publication number: US747718A
Application number: US15943503A
Authority: US
Inventors: Henry H Huff
Original assignee: HUFF LOCOMOTIVE APPLIANCE Co
Current assignee: HUFF LOCOMOTIVE APPLIANCE Co
Priority date: 1903-06-01
Filing date: 1903-06-01
Publication date: 1903-12-22
Anticipated expiration: 1920-12-22

Description

PATENTED DEC. 22, 1903. H. H. HUPP.

FURNACE.

APPLICATION FILED JUNE 1, 1903.

3 SHEETS-SHEET 1.

N0 MODEL.

- No. 747,718. PATENTED DEC. 22, 1903.

H. H. HUFF.

- FURNACE.

APPLIOATION FILED JUNE 1, 1903.

3 SHEETS-SHEET 2.

N0 MODEL.

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THE- non'rils PETERS c0. Pno'rour PATENTED DEC. 22; 1903;

H. HUFF.

FURNACE. APPLICATION FILED JUNE 1 1903.

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ratente fbecmbei- 22, 1903*.

UNITED STATES-PATENT OFFICE.

HENRY HQHUFF, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO HUFF LOCO MOTIVE APPLIANCE COMPANY, OF KITTERY, MAINE, A CORPORATION OF MAINE.

FURNACE.

SPECIFICATION formingpart of Letters Patent No. 747,71 dated ecember 2 Application filed June 1, 1903. Serial No. 1 i 111011619 6 This invention relates to furnace or fire-box' doors, and particularly to doors of thefurnaces or fire-boxes of locomotive-engines, al-' IO though my invention is not limited to this use and may be applied to's'tationary or other engines as well as'to locomotives.

The invention has for its chief object to provide a two-part door com posed of a hinged up- I per section adapted to swingon'a horizontal axis and a sliding lower section which is connected with the upper section in such mannor that the two sections are opened and closed simultaneously, the sliding section constituting a counterbalance to support the swinging section in any desired position and reduce the labor or force required to open and close the sections to the minimum.

, The invention also has for itsob'ject to provide certain incidental improvements; and it consists .in the several improvements which I will now proceed todescribeand claim.

Of the accompanying drawings, forming a part of this specificatiom'Figure 1' represents 0 a front elevation of a furnace-door and its casingembodying my invention. Fig. 2 represents a section on line 2 2 of Fig. 1. Fig.- 3 represents an edge or end elevation, a part of the furnace-wall being shown in section.

Fig. 4 represents a section on line 4 4 of Fig.

1. Fig. 5 represents a section on line 5 5 of Fig. 1. Fig. 6 represents a View similar to Fig. 2, showing the door-sections opened. Fig. 7 represents a section'online 7 7 of Fig. 0 1. Fig. 8 represents a front elevation showing the doors open. Fig. 9 represents an end view-showing the doors open. Fig. 10 rep resents an elevation of the back wall of a locomotive fire-box provided with my improved door. Fig. 11 represents a perspective view of the body portion of the door-easing. Figs. 12, 13, 14, and 15 represent perspective views of detached parts hereinafter referred to. Fig. 16 represents aview similar to Fig. 1, showing a counterbalancing-weight. Fig. 17

same parts in all the figures.

In carrying out my invention I provide a door-casing which preferablyincludes a body or frame portion 12 of the general form shown in Fig. 11, the same having a dooropening 13 and being adapted to be bolted or otherwise secured to the back wall 14 of a furnace orffire-box. 7o

15. represents a swinging door section which is hinged to the casing-12, the preferred connection between the section 15 and casing 12 being by means of. arms or trunnions 17 17, formed on 01' affixed to the section 15, and

' bearings on the door-casing composed of lower sections 18 at opposite endsofthe door-opening, and upper sections 19, formed 011 a cast ing 20, which is bolted to the casing 12 above the door opening. The door-section 15 is adapted to swing inwardly'into the fire-box.

21 represents the lower or sliding section of the door, which is movable vertically on the casing, its movements being controlled by guides with which'the casing is provided, as

hereinafter described. Theslidi'ng section 21 is provided at its ends with oppositely-projecting arms or trunnions 22, which are connected by links or rods 23 with the. swinging ends of arms 24, affixed to the trunnions 17 of 0 the swinging section, the arrangement being such that when theswinging section is opened or swung inwardly the arms 24 are depressed and permit the downward movement of the sliding section 21, thus'fully uncovering the door-opening, as shown in Figs. 6, 8, and 9.

It will be seen that the sliding section 21 is caused by the described connections'between it and the swinging section 15 to act as a counterbalance for the latter, theswinging lOO section being retained by the sliding section in any position to which it may be adjusted. Owing to the fact that the two sections are thus counterbalanced the labor required in opening and closing the sections is reduced to the minimum.

25 25 represent guides composed of vertical strips or bars affixed to projections 26 27, Fig. 11, on the outer face of the casing 12, the portions of the guides between said projections being separated from the casing by vertical spaces which receive squared portions 28, Fig. 15, formed on the sliding section'2l. The guides 25 prevent the sliding section 21 from being displaced sidewise or outwardly from the casing 12. Endwise displacement of the sliding section 21 is prevented by a vertical guiding rib or member 29, formed onthe casing below the door-opening, and a complemental guiding member formed as a vertical groove 30 in the inner side of the sliding section 21, the said groove engaging the rib 29.

31 represents a lever or handle fast to one of the trunnions 17 to enable the operator to open and close the door-sections. To provide against loose movements of the door-sections, I provide retaining means comprising a fixed segmental arm 32, afiixed to the firebox wall and provided with a series of bosses 33, and a yieldingly-supported latch or detcnt member 34, mounted on studs 35, which are supported by the operating-lever 31 and pressed outwardly by springs 36 into engagement with the bosses 33. When the member 34 is between any two of the bosses, the lever cannot be moved to carry the member 34 across either of said bosses without the application of suflicient force to overcomethe springs 36.

It will be seen that the two

sections

15 and 21 operated simultaneously enable the dooropening to be quickly opened and closed with a slight effort on the part of the operator and enable an opening of any desired size to be continuously maintainedt-hat is to say, the door-sections may be left at various positions between their extreme open position and their extreme closed position.

In Figs. 19 and 20 I show means for adjusting the sliding section 21, so that when the swinging section is closed and the sliding section is raised to its fullest extent there may be still an opening of any desired width left between the adjacent edges of the two sections for the admission of any fixed amount of oxygen. To this end I provide the lower portion of the links 23 with longitudinal slots 37, in which the arms 22 of the sliding section 21 are vertically adjustable, the said arms being supported in the slots 37 by means of stoppins 38, inserted in the slotted portions of the links, there being a series of orifices 39 formed in the slotted portions of the links at diflerent heights to permit the pins 38 and the sliding sections 21 to be correspondingly adjusted.

In Figs. 16, 17, 18, and 19 I show an additional counterbalancing-weight40,suspended by a rod 41 from the operating-lever 31. Said weight, which may be made in sections, so that it can be increased or diminished, is intended as an auxiliary to the sliding section 21. The operating-lever 31 is provided with an arm or extension 42, in which is formed a slot 43. Said slot receives a pin 44, which connects the upper end of the link 41 with the arm 42. The arrangement is such that when the doorsection 15 is closed, as shown in Fig. 17, the slot 43 is inclined in such direction as to cause the pin 44 to move to the inner end of the slot. When the pin is in this position, the operative length of the arm 42 is so reduced that the etfective force of the weight 40 is reduced to the minimum. When the door is opened, as shown in Fig. 18, the slot 43 assumes an opposite inclination and the pin 44 is caused to move to the outer end of the slot, thus increasing the effective force of the weight 40. The weight 40 and the described connections between it and the swinging door are not claimed herein, the same being shown and claimed in Letters Patent No. 726,298, dated April 28, 1903. In the present case I have added to the devices shown in said patent means for securing the pin 44 rigidly at any desired point in the slot 43, said means comprising a thumb-nut 45, engaged with the threaded end of the pin or bolt 44, said nut cooperating with the head 46 of said bolt in causing the two plates 47 47, which are connected with the upper end of the link 41, to bind firmly upon the opposite sides of the arm 42, and thusimmovably secure said plates and the pin 44 to the arm 42. If the pin is thus secured to the arm when the parts are in the position shown in Fig. 18, the weight 40 will tend to hold the door-section 15 open so long as the pin remains engaged with the arm 42.

I claim- 1. A furnace-door comprising a hinged upper section, and a vertically-movable lower section serving also as a counterbalance for the hinged section.

2. A furnace-door comprising a hinged upper section, a vertically-movable lower section, and connections between the two sections for imparting movement from one section to the other.

3. A furnace-door comprising a hinged upper section, a vertically-movable lower section, and means for simultaneously moving said sections to and from their closed and open positions.

4. A furnace-door comprising a hinged upper section, a vertically-movable lower section, swinging arms engaged with the upper section, and rods or links connecting the swinging ends of said arms with the lower section.

5. The combination of a door-casing having bearings at its upper portion and vertical guides below said bearings, a swinging doorsection having trunnions journaled in said bearings, a sliding door-section engaged with said guides, and connections between the two sections.

6. The combination of a door-casing having bearings at its upper portion, vertical end guides below said bearings at opposite ends of the door-opening, and a central ver tical guide or rib below the door-opening, a swinging door-section having trunnions journaled, in said bearings, a sliding door-section having arms at its ends engaged with said end guides, andacentral guiding member-engaged with the central guide-swinging arms affixed to the said trnnnions, and rods or links con necting said swinging arms with the arms on the sliding section.

7. A furnace-door comprising a hinged upper section, a vertically-movable lower section, connections betweenthetwo sections for imparting movement from one section to the other,and means for retaining said sections in different positions.

8. A furnace-door comprising a hinged upper section, a vertically-movable lower section, connections between the two sections for imparting movement from one section to the other, a lever affixed to the hinged section and provided with a spring-pressed detent member, and a fixed arm provided witha series of projections adapted to cooperate with said detent member.

9. A furnace-door comprising a hinged upper section, a vertically-movable lower section, swinging arms engaged with the upper section, and rods or links pivoted to the swinging arms and adjustably connected with the lower section, whereby the latter may be adjusted relatively to the swinging section.

10. The combination of a hinged door, a slotted arm affixed to the door, a counterbalancing-weight, a link connected with the weight, a slidable connection between the link and the slotted arm, and means for securing said connection at any point within the range of its sliding movement.

In testimony whereof I have afiixed my signature in presence of two witnesses.

HENRY H. HUFF.