US2203819A - Lock - Google Patents

Description

June 11,V 1940. -c E ,.-YFE 2,203,819

LOCK

Filed sept. 14. 1937 2 sheets-sheet 1 C. E. FYFE June 11, 1940.

LOCK

2 SheetS-Sheet 2 Filed Sept. 14, 1937 public. l sliding orswinging doors inthe various partitions.

Patented .une `11,3 1940 2,203,819* c Look1 Charles E. Fyfe, Cedarhurst, N.` Y, "Application september 14,1937, serialnd. 163,723 3 claims. (c1. 'zo-99T` This invention relates to locks and more particularly to trick or secret locks invwhich the manner of opening is not known to the general Suchv locks are desirable in banks on An object of the invention is to provide iii a lock of this character a method of operating the same that is simple, positive,land practicable but nevertheless obscure, so that unauthorized parties attempting to operate same will be confused and delayed andthus more readily observed.

`lilmbodirnents of the invention are illustrated in the drawings as adaptable to sliding and w swinging doors respectively.

`The invention `consistsof a latch-bolt that is raised, or in a modied form retracted, to open the door. `In both instances a swinging lever is provided constituting what I may be termed a hidden key,` for actuating the `bolt by the partial rotation of said lever.` The device is further characterized bya hidden key hole consisting of an opening through a plate located verticay in a plane between the bolt andthe operating lever, the openingbeing of a `coniiguration corresponding to that ofthe lever. The lever is shown as forming a part of a transverse rod provided with handles at either` end. I

To operate the lock it is first necessary to rotateleither handle together with the rod and lever to flndthe key hole. This is accomplished by bringing the key-lever into proper registration the mechanism to its initial position of rest upon` releasing the handle. l

In the drawings: I Figure l is a side elevation of the lock with a portion of a sliding door, door jamb and partition shown.

Figurel 2 isla central vhorizontal section of Figure l but showing the voperating key-lever in registration with the key hole.`

`Figure 3 is a vertical section of theline 3 3 of Figure 2.

` Figure 4f is a vertical section of a modiiied form` of the invention suitable for swinging doors.

, employed,

Figure 5` isa side elevation of `a modied form of the `invention in which a supplemental key is vFigure 6` isacentral horizontal section of Figure'5.` I l Figure 7 is a vertical section on the line 'l-'l oi `Figure 6.

Figure 8 is a perspective view of the latch-lever pin, and, I i Figure 9 is an elevation partly in section showing the supplemental key and a cooperating portion` of the `side wall of` the lock in section.

Refer now to the drawings, in which I is a portion of a sliding door to which the lock I I may w be secured against one side thereof as by rivets I2 I passing through the woven wire i3 of the door and throughaplate I4 on the other side of the wire mesh, so that the plate and lock will be held in clamped relation to the door in cooperation with the frame I of the door.

The lock comprises a rectangular casing It having a plate or cover Il suitably secured thereto. Within the casing or housing I6 is a latchbolt I8 pivotally mounted on a cross pin I9 and spaced` from the wall of the casing and the plate Il by sleeves 2U and 2i respectively. The right end of the casing is apertured as at 22, through which the outer end of the bolt projects and within which it is free to `move vertically to a limited extent. The outer end of the bolt `is notched at 23 to provide a shoulder 2li and is bevelled at 25.

. To the door jamb 2G of the partition on which the `door Ill is slidably mounted, is secured a keeper 2l apertured as at 28 to receive the notched end of the bolt.

Itwill be apparent in the drawings that when the door is slid toward the jamb 26 the bevelled portion 25 ofthe bolt will engage the lower edge of the aperture 28Ito thereby liftY and rock the belt 1 about the pivot I9. When the door is fully closed the shoulder` 24 will fall beyond this `edge to lock the door, such `movement being accelerated by the spring 29.

Mechanism is provided for actuating the bolt tokunlock the door. I This includes a transverse shaft or rod 301V journaled inthe side wall of the casing and in the cover plate, for rotation beneath `the bolt I8.

The outside of the shaft 30 has secured thereto a push button `3I, and also a finger piece 32 which` latter extends at an angle normal to the axis of the shaft 3@ to which latter it is pivotally secured as at 33, and through a slot in the side of the button 3l. The opposite or inside end of the shaft 30 is provided with a knurled knob 34 secured thereto.` I

A key-hole plate 35is secured to the bottom wall of the casing I6 in any `suitable manner and extends upwardly in a plane between the bolt I8 and the adjacent side wall of the casing |16.

On the other side of the bolt I8 is a washer 36. The shaft 30 extends through the washer4 36 and through a key-hole opening 31 in theA plate 35.

Thus the bolt I8 when operated is guided between the plate 35 and washer 36, the latter being substantially equal in thickness to the clearance between the bolt I8 and the adjacent surface of plate I1. The plate 35 is preferably mounted close to the opposite side of the bolt I8.

Forming an integral part of the shaft 38 isa key-lever 38 of a shape andsize to fit `snugly within that part of key-hole opening 31 that is not occupied by shaft 38. A spring 39 engages an annular groove in shaft 38 andurges the shaftl -outwardly to an extent limited by the contact of knob 34 with plate I4.

Normally the finger `piece 32 hangs in a vertical plane as shown in Figure l. When it is desired to open the door from the outside, the operator engages the loop 32 in linger piece 32 with the index nger of his left hand and. partially rotates same in a clockwise direction with his thumb on button 3|, until key-lever 38 has come into alignment with key hole 31. Then by pushing in with the thumb, the key-lever 38 against urge of spring 38 will pass through key hole 31 and into a plane corresponding to that ofthe bolt i8 and therefore directly beneath same. Rotation of the parts in a counter clockwise direction will now obviously raise the bolt and free it from the keeper 21 so that the door maybe permitted to slide rearwardly into an open position. From the foregoing it-will be apparent how the'lock may be opened from the inside of the door, by rotating and then pulling the knob 34.

The parts are restored to normal positionv automatically because spring 29 is strong enough to` force bolt I8 downwardly against key-lever 38, rotate same and thereby also lift finger piece 32 until further movement is arrested by the engagement of the bolt with the lower edge of laperture 22. The key-lever will then be in realignment with the key hole 31 whereupon spring 38 is free to move the shaft 30 and with it the key-lever 38 the latter passing again through key hole 31.

When key-lever 38 is clear of the key hole, finger piece 32 will drop into its lowermost position and swing key-lever 38 again out of align,- ment with key hole 31, but now such position of the key-lever will be on the opposite side of plate 35 than just heretofore.

In Figure 4 a sliding bolt 40 is shown, the outer end of which is bevelled `for swinging engagement with a keeper 4I. Guides 42 slidably support the bolt 48 in conjunction with aperture 43 in casing I6. The bolt 48 is notched at 44 to receive one end of a spring 45'the other end of which is secured to casing I6', and which urges the bolt into latching and `locking position. The bolt is also cut away along its bottom surface to provide a shoulder 46 and has a stoppin 41 to limit its movements toward the right, or' outwardly.

The operation of this modified form of the invention is the same as heretofore described except that the bolt is retracted to open the look instead of being lifted.

The parts are restored to normal position by spring 45 as soon as yfinger piece 32 is released because shoulder 46 by engagement with. keylever 38 will rotate shaft`36 clockwise until keylever 38 is realigned with key hole 31, and then v'spring 39 will actuate shaft 38 to return keylever 38 through key hole 31.

To assist in the realignment of key-lever 38 l with key hole 31, a projection 35 may be punched out of the key hole so as to extend inwardly at a right angle to the face of the plate 35 with its upper surface flush with the lower edge of the key hole 31. Projection 35 also functions to compel counter clockwise rotation of the keylever 38 when the same is in its bolt-actuating position.

Referring to Figures to 9, another form of K lock is illustrated that is .generally similar to is provided with an annular groove 53 normally aligned with lever 5I so that the forward edge of the latter may be held within said groove by a spring 54 and against the side of theshaft,

which latter serves as a stop. When the parts are in this position the forward edge of lever 5I also extends into the plane of a hole 51 the purpose of which will presently appear. As shown in Figure 7 the position of the parts above described will lock shaft 38 against axial movement in either direction.

For the purpose of unlocking shaft 38 from the outside of door I8 lever 5I has a hooked portion 55 which may be engaged by the key 58 to swing the lever in a clockwise direction, as viewed in Figure 7, about pivot 52, and out of engagement with the groove 53. The lever pin 56, shown in Figure 8, may then be inserted through the hole 51 extending through botlh plates I4 .and I1. This pin will then prevent the lever 5I from being retracted by spring 54 may again pully lever 5I into locking position,

key 58 being merely used to move the parts into unlocking position. The door may then be closed and the bolt I8 will latch in a well known manner. It will be understood that pin 56 may also be used to unlock the door from the inside because of its bevelled surface 56', shouldthe door be locked inadvertently.

Key 56 consists of a steml 58 with the usual fiattened ringer portion at one end, and a dog 59 pivoted at 68 to the other end. The dog has an open slot 6I a'nd a rounded surface 62.

In addition to key-hole opening 31 for keylever 38', key-hole plate 35 has a key hole 63 for the insertion of key 58, and similarly a key hole 63' is provided in the side wall of casing I6.

It will`be noted that key hole 63 is circular with shown in'full lines in Figure 9 its upper edge will be above the topsurface of key stem 58. Abutting surfaces shown in this figure prevent the dog from falling to a lower position. Therefore when the key is vinserted in key hole 63 the dog l58 may pass through the slotted portion thereof.

Key hole 63 having the longer slot, permits the key U to be Withdrawnwhen the dog 59 is in the position shown in dotted lines in Figure 9. During this movement the dog will engage the p top edge of the slot and be moved backto the `position shown in` full lines.`

For., the purpose of moving the dog 59 into the dotted position of Figure `9 so that it may engage` lever 5l, plate Il has a projection 64 extending inwardly therefrom, when key 5D, as shown in l Figure 9, is inserted through key holes 63 and 63, surface E2 of the dog 59 `will engage projecy tion 64. `Then as the key is pushed further inwardlyagainst the sloping surface of said prof jection, such engagement will tilt dog 59 into the dotted position of Figure 9. i l

After the dog has thus been tilted rotation of the key` in a counter-clockwise, direction, as in Figure '7, and downwardly as in Figure G, will then bring dog 59 into engagement with hook of lever 5I, and upon further slight rotation of the key the lever will be rockedaway from shaft 30' against the opposition of spring` 511; Pin 56 may then be inserted to maintain the lever in said position, Any` thrust axially of shaft 30' upon lever 5| when in locked position will be taken in one direction bya lug on casing IE',

and in the opposite Vdirection by plate I1.` A pin l 66 is employed to provide means for guiding the dog into realignment with the slot of key hole 63 to facilitate withdrawal of key 50.` 1

To protect the occupant of the cage or room from. undesired interruption alsec'ond hole 5l extending through the plates I4 and I1 may be provided and will permit the occupant to place thepin 56 therein and thus prevent the key 50 from engaging lever 5I. y

I claim: l l 1.` Ina lock having a housing, mechanism inl cluding a latch-bolt, a rotatable sliding shaft, a

handle secured to said shaft exteriorly of said housing `adapted to both rotate'and slide said shaft, a` key lever adapted to Amove with said shaft, and a stationary platewithin said housing having-'a key hole, said plate and the keylever being hidden within said housin-g, and

`means operable from the exterior of the housing leffective to both` `rotate and slide said `shaft whereby when said handle is actuated said keylevermay -be aligned with and moved through said key hole and actuate the latch-bolt, and further means for automatically restoring the said mechanism to its ynormal position following said actuation and the release of'said handle.

2; In a lock having a housing, `mechanism includinga latch-bolt, a rotatable sliding shaft, a key-lever carried by said shaft, and aplate having a key l1ole,`the latter and the key-lever `being hidden within said housing, andlmeans operable from the exterior of the housing effective to both l rotate and slide said shaft whereby the key-lever may be aligned withand moved through said key hole l and actuate the latch-bolt, and further means for automatically` restoring the said` mechanism to its normal position following said actuation, including spring-means adapted to urgelsaid latch-bolt toward and into engagement with said key-lever, and rotatev said sliding shaft, and furing having` a key hole, said `plate and the key` lever being hidden Within said housngg and means operable from theexterior ofthe housing effective to both `rotate and slidesaid shaft wherebyA when said handle is actuated said keylever may" be alignedwith and Imoved through said key hole and actuatejlthe latch-bolt, and a u,

spring for normally urging said shaft V*and keylever in a direction away from `said plate inde-` pendently of said handle.

n CHARLES E. r'vr'ir.y t

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