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Publication numberUS425777 A
Publication typeGrant
Publication dateApr 15, 1890
Filing dateSep 12, 1889
Publication numberUS 425777 A, US 425777A, US-A-425777, US425777 A, US425777A
InventorsWilliam Lodowick Godfrey
Original AssigneeF one
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
William lodowick godfrey
US 425777 A
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Description  (OCR text may contain errors)

(No Model.) Y



Patented Apr. 15,1890.

Q4 @mw/S WW w We@ @WL o., mamma-mn n c l tain improved features of construction and UNITED STATES PATENT OFFICE.



SPECIFICATION forming part of Letters Patent No. 425,777, dated April 15, 1890. Application filed September l2. 1889. Serial No. 323,698. (No model.)

To @ZZ whom t may concern,.-

Be it known that I, WILLIAM LODOWICK GODFREY, a citizen of the United States, residing at Brooklymin the county of Kings and State of New York, have invented certain new and useful Improvements in Electricl Door-Openers; and I do hereby declare the following to be a full,` clear, and exact description of the invent-ion, such as will enable others skilled in the art to which it appertains to make and use the same. j

My invention relates' to improvements in electric door-openers; and it consists in cercombination of parts, which will be hereinafter fully described.

I have illustrated my said invention inthe accompanying drawings, and it is fully disclosed in the following specification and claims.

In the drawings, Figure l represents a side elevation of my improveddoor-opener. Fig. 2 is a horizontal section through the same and a portion of a door. Fig. 3 is a detail view showing the parts in their open position. Y

In the drawings, A represents the frame or casing of the device, which is so constructed as to provide means for attaching and snpporting the various parts of the same. The casingAis provided with a face-plate a, which lies fiush with the face of the door-j amb when the device is in operativerposition, and I preferably provide said casing with a web or partition ct', which divides the said casing into two parts. In the face-plate ctis formed a recess c2 to receive the bolt of the latch on the door, and within the. casing is pivoted a tumbler B, which is provided with a notch or recess t), forming a continuation of the boltrecess a2, and providing a shoulder b', which normally engages the straight side of the latch-bolt and prevents the opening of the door. The opposite side of the shoulder b is inclined to engage the inclined face of the latch-bolt and force it inward against its spring as the door is closed. The tumbler B is provided with a suitable spring b2, which holds it normally in position to lbe engaged by a latch-bolt. The tumbler B is provided at each end with arms b3 b3, which extend rearwardly a short distance in an inclined direction from the point of pivoting and are connected by a cross-bar b4.

At the rear of the tumbler B is a cam C, which is pivoted between two lugs projecting from the main casing A, and consists of a lever having a long arm c and a short arm c', which extend at an angle to each other from the point of pivoting, and the arm c is pref- 6o erably curved, and'is provided adjacent to its free end with a curved bearing portion c2. The cross-bar h4 of the tumbler B rests normally in the angle formed by the arms c and c of the cam C, and when in that position the free end of arm c will be adjacent to the said tumbler at its point of pivoting. The said arms c and o are so constructed that a movement of the tumbler B in one direction will cause the cross-bar to bear upon 7o the under side of the curved arm c and raise the same, while a movement in the opposite direction will cause said cross-bar to engage the short arm c and force it in the opposite direction, returning the arm c' to its normal 75 position. Thus it will be seen that the cross- 'bar of the tumbler operates the cam C positively in both directions.

Adjacent to the free end of the arm c of the cam C is pivoted a lever D, which serves as a 8o keeper or locking-lever. This lever is provided with a suitable spring CZ, which holds it down in contact with the arm c of the cam.

If, however, the said arm is raised, as before describe-d, the curved bearing-surface c2 will 8 5 bear against the under side of the keeper D and raise it. It will be noticed that the crossbar b4 of the tumbler bears against lever-arm c adjacent to its pivot, and that the curved portion c2 of said arm bears againstthe keeper 9o D adjacent to its point of pivoting. It will therefore be apparent that a very slight detent applied to the free end of the keeper D will, by means of the great leverage given by both levers D and c, be able to resist a much greater force applied to the shoulder b', as in an effort to force openv the door.

In order to provide means for holding the free end of the keeper D, I employ an oscillating locking device, which consists of a spinioo dle E, provided with a projection e to engage the end of the keeper D and hold it from being forced backward.. The spindleis also provided with a pin or projection e', which engages suitable stationary lugs or projections f, and thereby limits the oscillation of the spindle in both directions. A spring e2 holds the pin e in engagement with one of said lugs and the projection e in position to lock the keeper D from movement. In constructing this oscillating device I prefer to mount theA spindle E in suitable ears or supports F, which are secured to the casing A, and secure said spindles in position to rotate by means of screws passing through said ears and entering apertures in the ends of the spindle.

The free end of the keeperD is provided on its forward face with an inclined portion d', as shown, vso that when thrown back into its norlnal position by its retracting-spring dit will force the lookin g projection e to one side andresume its locked position. j

To some convenient portion of the casing A is secured an electro-magnet G, adapted to act upon an armature g, rwhich is provided with a suitable retracting-spring g. To the said armature g is secured an arm b2, which engages a projection e3 from the spindle E' when the armature is drawn to its magnet and oscillates the said spindle, thereby removing the locking projection from engagement with the keeper D. If the dooris pulled with some degree of force while the keeper is thus free, the latch-bolt will force back the tumbler B, raising the arm c of the cam and the keeper D, as shown in Fig. 3, and releasing the said latch-bolt, whereupon the door may be opened. Assoon as the circuit through magnet G is broken, the armature and the spindle E return Ato their normal positions under the influence of their springs, and the projection c is again in the path of the keeper D.

When the latch-lock is disengaged from the tumbler by the opening of the door, as before described, the tumbler is returned to its normal position, and inso doing the cross-bar b4 strikes the short arm c of the cam, returning said cam positively to its position and permitting the keeper D to pass the locking projection e, and the parts are again in their normal positions. Should the tumbler and connected parts return to their normal positionsno pressure will be exerted upon the detentor projection e by an ordinary pull upon the door; but when a considerable pull is exerted the keeper D will'be held from all movement by the detent e.

It will be understood that the electro-magnet G may be operated and controlled from any suitable point at any desired distance, as found most convenient and desirable.

I do not'wish to be limited to the exactdetails of construction herein shown and described, as the same maybe varied Without departing from the spirit of my invention.

What I claim, and desire to secure by Letters Patent, is

l. In a door-opener, the combination, with a tumbler, the keeper, the locking device for said keeper, and means for releasing the same, of a cam interposed between said tumbler and keeper and adapted to be moved positively in both directions by said tumbler, substantially as described.

2. In a door-opener, the combinatiomwitli a tumbler provided with a cross-bar, of a cam having arms adapted to be engaged by said cross-bar for moving the same positively in `both directions, a keeper for said cam, an oscillating locking device for said keeper, and a tripping device for oscillating said locking device and releasing said keeper, substantially as described.

3. In a door-opener, the combination, with the tumbler provided with a cross-bar, of a cam provided with a long arm and a short arm disposed atan angle thereto, both of said arms adapted to be engaged by said cross-bar for moving said cam positively in both directions, a keeper for said cam, and means for locking and releasing said keeper, substantially as' described.. V

It. In a door-opener, the combinatiomwith the tumbler provided with a cross-bar, of a pivoted cam having a long arm and a short arm disposed at an angle to each other and adapted to be engaged by said cross-bar for moving said cam positively in both directions, a keeper engaging the long arm of said cam and pivoted adjacent to the free end of `the path of said keeper and a` projection adapted to be engaged by an armature-lever, `an electro-magnet for operating said armature-lever, and a retraction-sprin g forrctracting said spindle after it has been rotated by said armaturelever, substantially as described.

In testimony whereof I aix my signature in presence ot two witnesses.





Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US7770949 *Oct 24, 2007Aug 10, 2010The Boeing CompanyReduced door opening force and enhanced security flight deck door mechanism
Cooperative ClassificationE05B47/0047