US1963877A - Grate key - Google Patents

Description

GLE

June 19, 1934.

GRAT KEY Filed Aug. 10, 1952 INVENTOR /M w w a M R WW ,1 A WW WY .B G

Patented June 19, 1934 UNITED STATES PATENT OFFICE 1,963,877 :GRATEKEY,

George Ziegler, Bogota, N. J.

Application August 10, 1932, Serial No. 628,225 6 Claims. (o1.-110

This invention relates to grate keys and has for an object to provide an improved construction which may act as a master key and may be put on as the last key on the bar, or at any other desired point, without disconnecting the bar.

Another object of the invention is to provide a grate key which includes the use of two sections independently mounted on a bar and then connected together.

A further object of the invention is to provide an improved grate key which is an improvement over that shown in my prior Patent No. 1,784,772, issued December 9th, 1930.

In the accompanying drawing Figure 1 is a top plan view of a grate key-disclosing an embodiment of the invention, the same being shown applied to a bar;

Figure 2 is a side view of the structure shown in Figure -1, the bar being shown in section and one section of the key being in a raised position;

Figure 3 is a bottom plan view of the key when in operative position but with the supporting bar removed;

Figure 4 is an enlarged fragmentary sectional view through Figure 1 on the line 4-4;

Figure 5 is an enlarged fragmentary sectional View through Figure 2, on the line 55.

Referring to the accompanying drawing by numerals, 1 indicates the grate key as a whole, while 2 and 3 indicate the respective sections thereof. The key 1 is mounted on a supporting bar 4 of the usual construction. The key 1, or similar keys, or other shaped keys, as, for instance those shown in my prior patent above ,mentioned, are supported by suitable bars, as, for instance, the bar 4, carried by endless chains, or other members which form no part of the present invention. In traveling grates different forms of chains, cross bars or other form of support are provided whereby various types of grate bars are caused to travel from one end of a furnace to another around a suitable wheel, and then back to the starting point around a second wheel. This arrangement of endless chain or belt is old and well known and forms no part of the present invention, except that the various keys 1 are used on some kind of support of this kind which utilizes a bar similar to the carrier bar 4, as shown in the drawings.

In most of these forms of grates a number of keys are arranged on each bar 4, but in many forms it is difficult to mount the last bar in place, and in the present instance key 1 is intended to 1 act as a last key, sometimes known as a master key as it may be applied by a downward and a sliding movement, instead of being threadedon the end of the bar as is -customar-y in most cases, as, for instance, the case disclosed in my prior patent mentioned above.

Key 1 is provided with suitable air inlet grooves 5 and an underlapping extension ,6 and an over-I lapping extension 7, .50 as to cQaGt mt sim lac f keys when the grate is completed, In addition,

section 3 is provided with a recess 8 merging into what may be termed an aperture 9, while the front is provided with an extension 10 which is preferably integral, the same having a-large head 11. The extension 10 is adapted to project through the slot 12 formed in section 2. This slot merges into a recessed portion 13 adaptedto accommodate the head 11. From Figure -5 it will be seen that the shoulders 12' and 12 project into the slot so as to interlock with the head 11 when the parts are assembled or in functioning 76 position. From Figure 2 it will be noted that the head 11 is elongated, and when in one position straddles the slot 12 and when in another position is adapted to pass therethrough. The section 2 is also formed with a socket or recess 14 8'0 and near its recessed end is arranged a projection 15 integral with the remaining part of the section, said projection fitting into the notch 8 and positioned to pass through the aperture 9.

An aperture 16 is formed substantially centrally of the projection 15, and through this aperture and through an aperture 17 formed in section 3 a cotter pin 18 is extended, the head of the cotter pin resting against the end of section 3 and the inner end of the cotter pin being bent at 19 whereby the two sections are locked together.

When applying the key 1 to the bar 4, section 2 is placed on the bar and moved to the left, as shown in Figure 2, until the hook or dovetailed recess member 20 straddles one edge of the bar. 96

The section 3 is then held vertically, while section 2 is horizontal, and the head 11 is passed through slot 12, after which section 3 is swung downwardly until the projection 21 strikes the bar 4,

after which it is slid to the right, as shown in 1.00

Figure 2, until the hook 22 interlocks with the bar 4, as shown in dotted lines in Figure 2. Substantially simultaneously with the interlocking operation, the end of section 3 is swung downwardly so that the upper surface thereof comes 1 ,68

flush with the section 2, aperture 9 accommodating the extension 15, so that when the sections are in parallelism, with hooks 20 and 22 engaging the bar 4, the extension 15 will be in position to receive the cotter pin 18. When the cotter 1'10 pin has been inserted and bent at 19 the parts are locked in position and cannot be removed except by removing the cotter pin 18.

What is claimed is:

1. In a travelling grate, a carrier bar, a grate key formed with a pair of sections mounted thereon in side-by-side relation, one of said sections having a hook facing in one direction for straddling one edge of said bar, an adjacent section provided with a hook facing in the opposite direction adapted to straddle the opposite edge of said carrier bar, said sections being formed with articulated means for connecting one of said sections to the other at one end, said articulated means being formed to permit longitudinal sliding movement of one of said sections with respect to the other so that said hooks may be moved into and out of engagement with said carrier bar, and means at the other end for locking said sections together and against longitudinal sliding movement.

2. A grate key comprising a body formed from a pair of sections slidable longitudinally with respect to each other when moved to a substantially parallel position, each section having a bar engaging hook on the under surface, the hook on one section straddling one edge of said bar and the hook on the other section straddling the other edge, and means coacting with said sections for locking them together after said hooks have been moved tofunctioning position.

3., A grate key comprisinga'body formed of a pair of sections, one of said sections having at one end a laterally extending opening, and a pair of shoulders, and the other section having a headed extension projecting through said opening with the head thereof interlocking with said shoulders whereby said sections are slidably and swingably connected at one end, and means at the opposite formed with swingable and slidable interlocking means at one end for connecting said sections together.

5. A grate key comprising a body formed of a pair of sections, each section having a bar engaging hook, one section having a slot at one end extending laterally therethrough, said slotted section having a recess adjacent the slot'and the other section having a fiatheaded journal member positioned so that said journal member may extend through said slot with the head positioned in said recess for swingably and slidably connecting said sections, and a cotter pin extending through part of the respective sections for locking said sections when in operative position against sliding and swinging movement.

6. A grate key comprising a body formed of two sections, said sections having bar engaging hooks and also interlocking means for slidably and swingably connecting the sections together at one end so that said hooks may be brought 105 into the same plane and then slid to straddle the opposite edges of a supporting bar, one of said sections at the free end having an apertured extension and the other a notched portion adapted to receive said extension, said other of said sec- 11-( tions also having an aperturearranged in alignment with the aperture in said extension and a 'cotter pin extending through both of said apertures for locking said sections together.

, GEORGE ZIEGLER.

Images