US1865778A - Hood latch - Google Patents

Description

'1! July 5, 19320 N. A. MEARS ET AL 5 7 HOOD LATCH Filed Sept. 11. 1931 2 sheets-sheet 1- z 5 T 6/ A 3 e fl v aw e c m 3 M w m U a w .FuEy 5, 19326 N, A, MEARS ET L HOOD LATCH Filed Sept. 11. 1931 2 Sheets-Sheet 2 'M kM fltto rug 9,

Patented July 5, 1932 UNITED STATES PATENT OFFICE NORTON A. MEARS AN'D DIBRELL P. HYNES, OF CHICAGO, ILLINOIS, ASSIGNORS TO CHI- CAGO FORGING & MANUFACTURING CO., OF CHICAGO, ILLINOIS, A CORPORATION OI ILLINOIS noon LATCH Application filed September 11, 1931. Serial No. 582,268.

Our invention relates to an improvement in a lock mechanism and has for one purpose the provision of improved locking means for an automobile hood closure. One purpose is the provision of an externally operatable for such a closure which will hold a hood late in hood securing position and which will prevent the actuation of the normal external means for unlatching the hood. Other ob- 10 jects will appear from time to time in the course of the specification and claims.

The invention is illustrated more or less diagrammatically in the accompanying drawings, wherein:

Figure l is a side elevation of the exterior of an automobile hood;

Figure 2 is an interior elevation, on an enlar ed scale;

igure 3 is a section on the line 33 of Figure 2; Figure 4 is a section on the line 44 of Figure 2;

Figure 5 is a section on the line 5-5 of Figure 2 Fi ure 6 is a view similar to the right half of Figure 2,013 a variant form; and

Figure 7 is a section on the line 7-7 of Figure 6.

Like parts are indicated by like symbols throughout thespecification and drawings.

Referring to the figures, A generally indicates a portion of'a frame or chassis of an automobile. A is the radiator and A a forward part of the body. A A indicate abutments a ainst which the double hinged hood closure i is adapted to be drawn.

Mounted upon the inner face of said clo-' sure isa rock shaft generally indicated as B having the terminal cranks B and the in- 49 termediate off-set crank portion 13. The

' rock shaft B may be supported at its ends in bearing members which include base plates 0 secured in any suitable manner to the inner face of the hood and the outstanding flange C whichmay be apertured as at C to receive the rock shaft. Preferably the stock of the flange C is upset as at C to provide what is in effect a cylindrical bearing of substantial- 1y glgeater length than the thickness of the stoc vided with a bottom D apertured as at D Inset in the cup is a, mating cup D with a reduced portion D which forms a cylindrical sleeve, the aperture of which is of the same diameter as D. The two apertures thus form axially spaced bearings which receive the handle shaft D associated with the exterior handle D Secured to the handle shaft D is a crank E which has associated with its outer end the crank pin E Pivoted to the pin E is the securing stirrup E which surrounds the off-set B of the rock shaft B. It will be understood that rotation of the handle D in either direction rotates the rock shaft B. through the engagement of the pin E or the stirrup E with the off-set B The lever E is also provided with a shorter extension E at the opposite side of the shaft D which terminates in a toe E which closely abuts against the surface of the'base plateD. The are of rotation of the lever E is limited by the inwardly extending off-sets or abutments E E which are adapted to be engaged by said toe E" G G indicate locking abutments fixed upon the automobile structure. They include, for example, the base plates G and the flanges G wlth the inclined locking surfaces G8 adapted to be engaged by the cranks B of the rock shaft B. The locking effect may, for example, be that which is more fully described in applicants Patent No. 1,809,720, issued on the 9th day of June, 1931.

Referring to the form of Figures 1 to 3, H indicates any suitable lock housing which may be secured to the base plate D. The details of the lock form no part of the present invention but it may be actuated from the exterior of the hood closure as by any suitlocking position. It is only after the bolt H has been withdrawn that the handle D can be moved into the dotted line position of Figure 2, thereby moving the cranks B into the unlocking position as shown in dotted line in Figure 2. V e

Referring to-Figures 6 and 7 the lock housing H is positioned above the rock shaft and .the bolt H engages the crank'E, preventing its movement from the locking position in which it is shown.

It will be realized that whereas we have described and shown a practical and operative device nevertheless many changes may be made in size, shape, num r and disposition and parts without departing from the spirit hood including a rock shaft rotatably mounted on the inner face of the hood, and means for rotating said rock shaft, including 'a'handle exterior to the hood, bearing means NORTON A. MEARS. DIBRELL P. HYNES.

of our invention as defined by the scope of t the claims. We, therefore, wish these drawings to be taken as in a broad sense illus trative and diagrammatic rather than limiting us to the precise details of our description and showing.

The use and operation of the invention are as follows:

We have illustrated a hood latch in general accordance with the showing of our Patent No. 1,809,720, issued the 9th day of June, 1931. It will be understood, for example, that the flexure of the rock shaft B, when the parts are in locking osition, serves to hold the lever E in the locking position with the toe E against the abutment E the position in which it is shown in Figures 2 and 6. It will be observed that the lever E is slightly over center and therefore the locking flexure of the rod prevents it from returning over center unless a positive twist or movement is manually given to the handle D. In order to prevent the opening of the hood by unauthorized parties we may position the lock housing H so that the keeper H will engage either the toe E or the crank pin E, to prevent movement of the handle D to unlocking position.

We claim:

1. In a latching device for a double hinged hood including a rock shaft rotatably mounted on the inner face of the hood, and

, means for rotating said rock shaft, including a handle exterior to the hood, bearing means for the rock shaft, including brackets secured to the inner face of the hood closure ;and having each a flange apertured to permit the passage of the rock shaft therethrough, said aperture having associated therewith a generaly cylindrical bearing member extruded from said flange.

2. In a latching device for a double hinged

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