US2049885A - Latch bar hammer for dipper buckets - Google Patents

Description

Aug. 4, 1936. E. YOUNIE LATCH BAR HAMMER FOR DIPPER BUCKETS Filed April 15, 1935 Patented Aug. 4, 1936 UNITED STATES LATCH BAR HAMMER FOR DIPPER BUCKETS Lewis E. Younie, Portland, .Oreg assignor-to Electric Steel Foundry Company, Portland,

Oreg.

Application April 13, 1935, Serial No. 16,229

4 Claims.

This invention relates generally to excavating machinery and particularly to a latch bar hammer for dipper buckets.

The main object of this invention is the pro- Vision of an improved form of latching mechanism for dipper buckets whereby the latch will function properly at all times, even when handling heavy sticky materials.

A secondary object is to cause the latch to be driven forcibly by an impact both in latching and unlatc-hing directions.

These, and other objects, will become more apparent from the specification following as illustrated in the accompanying drawing, in which:

Fig. 1 is a perspective view of the gate end of a dipper bucket showing the device in a latched position.

Fig. 2 is a fragmentary section taken along the line 2-2 in Fig. l.

0 Fig. 3 is a fragmentary section taken along the line 3-3 in Fi 1.

Fig, 4 is a fragmentary section taken along the line lt in Fig. 1 showing the gate about to close.

Fig. 5 is a view similar to Fig. 4, but showing 25 the gate closed and. the plug being forcibly ejected by the latch.

Fig. 6 is a section through a modified form of the latching mechanism.

Similar numbers of reference refer to similar 30 parts throughout the several views.

Referring in detail to the drawing, there is shown a common form of dipper bucket whose front I0 is attached to the sides II and whose door or bottom I2 is hinged to the rear side of 35 the bucket by means of the arms I3 and pins I4.

The front III is provided with a latch plate I5 having an opening I6 which receives the latch bar II, which is slidably mounted in the latch bar housing I8. The housing I8 is secured to the 40 door I2 by means of the cross braces I9. The foremost end of the latch bar I! is beveled to facilitate the latching operation.

To the rearmost end of the latch bar I1 is attached a lever 2I by means of a pin 22. The lever 2I is fulcrumed on the pin 23 which is adjustably supported by means of the eye bolt 24 and nut 25 which latter rests upon the rearmost brace member I9.

Secured to the door I2 is a guide 26 in which is 00 slidably mounted a hammer 21 to one end of which is securedan operating chain 28. The chain 28 may be secured to a lug 29 on the forward end of the hammer 21 if the construction of the bucket renders this desirable.

55 Extending through the hammer 21 is a longitudinal slot 30 through which is slidably passed the lever 2|. It is desirable to provide guides 3| on the door l2 for the lever 2I.

The operation of this form of the device is as follows: 5

p The hammer 21 is normally in the position shown in Fig. 1, that is, resting upon the lever 2| If it is desired to unlatch the bucket, the operator merely exerts a pull on the chain 28, causing the hammer 21 to move. The first posi- 10 tion of its movement, however, does not affect the lever 2I' until the end of the slot 30 is reached, which causes a sharp blow to be struck against the forward side of the lever 2 I, and withdrawing the latch bar I1 from the opening I6. 15

The same is true of the closing operation as shown in Fig. 5 in which a return movement of the hammer 21 will cause a sharp blow to be struck against the latch bar'II and forcibly eject the plug 32 from the opening I6. 20

In the form of the device shown in Fig. 6, the lever 2I extends through the slot 33 of a tubular guide 34 within which is disposed a hammer 35, which is preferably cushioned against a spring 36. The guide 34 is secured on the door I2 and 25 corresponds with the guide 26. Also fastened on the door I2 is a tubular guide 31, through-which passes an operating chain 38, which is secured to the lever 2 I.

The operation of this form of the device is sim- 3O ilar to that shown in Figs. 1 to 4 inclusive, except that the blow is struck only on the latching movement of the lever 2I instead of in both directions as in the first described form of the device.

Obviously, this may be accomplished in many 35 different ways without departing from the spirit of this invention. I therefore do not intend to be bound by the particular form shown in the drawing or described in the specification, but intend to cover all such forms of the device as fall fairly within the appended claims.

In the modification shown in Fig. 6 the operating chain 38 is attached directly to the lever 2| while the weight 35 is raised by the lever 2|; that is to say, it can strike a blow only for the purpose of driving out the plug 32, whereas in the preferred form of the device shown in Fig. 1, the chain 28 is attached to the hammer 21 Which is capable of driving the lever 2| in either direction.

I claim:

1. In a dipper bucket having a hinged door at its rearmost end, a latch at the swinging end of said door, said latch engaging an opening at the bucket front, means for manually Withdrawing said latch from said opening and a hammer for forcing said latch into said opening when brought into register therewith.

2. In a dipper bucket having a door at the outlet thereof and hinged to the rear side of the bucket and latched to the front side thereof, a latching mechanism consisting of a latch and keeper for holding said door in a closed position, a lever for actuating said latch, a movable weight associated with said lever and adapted to impart a striking blow thereto in a. manner to force said latch into said keeper when'said door isin a closed position.

3. In a dipper bucket having the bottom thereof in the form of a door hinged at its rearward side to said bucket and having a latch bar mounted 'on said door adapted to engage a keeper in said bucket, a mechanism for operating said latch bar consisting of a chain for operating said bar in one direction and a weight actuated by said bar for driving the same by impact in an opposite direction.

4. A latching mechanism for dipper buckets consisting of a latch bar and keeper, a lever for actuating said latch bar, a slotted hammer through which said lever extends and means for raising said hammer in a manner to strike a blow against said lever and permitting said hammer to strike a blow on said lever in an opposite direction under the action of gravity.

LEWIS E. YOUNIE.

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