US1556380A - Lock - Google Patents

Description

Oct. 6,1925 s. TREJO LOCK Filed m 10. 1923 v. mw v w .0 Mn T 4 i .7 a 3 m 4 6 m x m v v Patented Oct. 6, 1925.

' GUIIiLEBMO ranao, or NEvifiYoIt oon Application filed August 10, 1923. Serial no. 356,677.

'To all whom it mag concern;-

..;Be it known that "I, .Grrnnnmziuo TnnJd' a subject of the .King of Spainyresidingat NewYork in the county ofNew York and State'wof New. -York, yha-ve invented certain newiand xusefulflmprovements in Looks, of

' which the following isp'a; specification.

This invention relates "generally to looks, T having more particularreferenceto allock 1 for use on house-doors, the invention having for an object to produce a novel lock com-- bining both the elements ofkey actuation. and'themaking of a successive series of operations.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings and to the appended claims in which the various novel features of the invention are more particularly set forth.

Fig. l of the drawings is a perspective view showing my improved lock. 2

Fig. 2 is a. horizontal sectional View thereof, this view being taken on the line 2-2 of Fig. 3.

Fig. 3 is a longitudinal vertical sectional view taken on the line 3-3 of Fig. 2.

Fig, 4 is a transverse vertical sectional view taken on the line 44= of Fig. 2.

Fig. 5 is a transverse vertical sectional view taken on the line 55 of Fig. 2.

Fig. 6 is a horizontal sectional View indicating the door to which my improved lock is applied. a

As here embodied my improved lock comprises a rectangular casing 10 which is fitted in a suitable mortise in the door 11. Slidable in this casing is a bolt 12 which may be projected through a suitable aperture in the end of the casing into the usual keeper element in the door frame 13. The bolt 12 has formed in the top thereof an elongated The keyholes 16 are covered normally by a-shutterz25 which is hingedas at 26 toithe top. ofthe casing'and is normally urged to 1 closed "position by means of thespringx27 coiled :in a well known manner around the hinge-pintlexof the shutter. This shutter is preferably sunk a recess in. the frontwall I ofrthe casing "sodas to be flush withtheila tter. The shuttertis'normally held closed by two separate devices one of which co mprisesa spring latch 29 carried by the shutter :andengaging behind a. lip 30in the casing. The other acomprises a 'bolt' 31 slidably held in guides 32 on the shutter and having an oifset-end 31' adapted to engage behind the said lip 30, a. slot 33 being formed in the casing 10 in which the bolt. is accommodated. This bolt has a laterally turned finger 34 on its upper end. These two locking members are adapted to be released by the key 35 which is used to move the main bolt, the end of the key being passed through the slot extension 18 at the side of the shutter with the bit 36 turned toward the latter. The bit is-then pushed along the said slot behind the shutter and the key is then turned the bit then enga ing under the finger 3% on the bolt and li ts the latter. To enable the spring latch 29 to be lifted the key is formed with a separate handle element 35 which is screwed into a suitable socket in the shank of the key and is provided with a pin projection 37 which pushed upward through a f is adapted to be small. opening 38 111 the casing 10 to lift the latch from the lip 30.

indicated in the drawings the bolt 31 is spaced slightly from itskeeper element 30 'when the shutter 25 is tightly closed sov that when the catch 29 is released the shutter may move sufliciently to pass the end of the latch over the lip 30 before the bolt 31 is released.

As will be apparent, the keyholes through which access can be had to the bolt to shift the latter are covered on the outer side of the door by the shutter. To; give notice if an attempt is made to insert a key ora picking tool through the exposed slot 18, or keyhole 20 a plate40' is mounted in the casing behind said slot and carries a contact member 41 adapted to engage a fixed contact member42 to close a circuit to a bell or other signal if the plate is pushed inward in the casing. This plate is mounted for transverse movement in the casing on the guide members 43 and is normally pressed orward by means of expansion springs 44 bearing thereon.

To lock the door from the inside without the use of the key a spring pressed stud 50 may be mounted in a vertical slot 51 in the inner wall of the casing 10 and may be adapted to detachably engage in a suitable socket in the bolt 12.

It is; believed that the manner of action of my improved lock Will be readily understood from the above description. The key cannot be inserted for engagement with the bolt until the shutter 25 is opened and in order to do this the latch 29 must first be raised, and then the bolt 31 lifted.

Having thus described my invention what I claim as new and desire to protect by Letters Patent of the United States is as follows:

1. In a look, a casing having a number of keyholes in the face thereof united by a slot, a bolt, a shutter covering the keyhole through which access is had to the bolt, a locking element applied to the shutter, said locking element being accessible for release by the key for releasing the said bolt when the said key is inserted into the said slot.

2. In a look, a casing having a keyhole, a hinged shutter closing said keyhole, and a pair of locking elements holding said shutter closed, said locking elements being arranged for operation in a certain sequence to release the said shutter.

- 3. In a look, a casing having a keyhole, a hinged shutter closing said keyhole, and a pair of locking elements holding said shutter closed, said locking elements being arranged for operation in a certain sequence to release the said shutter, one of said locking elements consisting of a spring latch and the other of a sliding bolt.

In testimony whereof I have affiXed my signature.

GUILLERMO T REJ O.

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