US1431481A - Lock - Google Patents

Description

A. E. MORGAN.

LOCK.

APPLICATION FILED MAR. I6, 1921.

Patented (M. W, 31922.,

2 SHEETSSHEET I.

A. E. MORGAN.

LOCK.

APPucAnoN FILED MAR. 16, 1921i LALMAMD mm m. 1mm.

2 SHEETS-SHEET! 2.

Jeanine on. in, man

in, in a l,,til I WW Ema in.

nrrsnn'r n. MORGAN, or nonrn ivrntnonnnn, mama, AUSTRALIA, ASSIGNOR TO JIINKS AND monsnnrnornrnrenv LIMITED, or nonrn MELBOURNE, vrcronrn,

AUSTRALIA.

LOCK.

Appfication filed March 16, 1921. Serial No. 452,783.

To all whom it may concern:

Be it known that ALBERT EDWARD Mon- GAN, a subject of the king of Great Britain, residing at North Melbourne, in the State of Victoria, Commonwealthof Australia, have invented new and useful Improvements in Looks (for which applications have been filed in Australia, No. 14,188, dated January 30, 1920, and No. 18,236, dated October 14:, 1920), of which the following is a specification.

This invention relates to improvements in looks, and comprises strong, simple and ethcient mechanism which may be readily and cheaply constructed and assembled.

Door locks in general use are of twotypes commercially known as rim-locks and mor tise-locks. Each of these locks is normally of a distinct construction requiring :for its commercial production the use of specially designed machines and tools. The lock mechanisms are usually made from cast metal; and as a consequence the parts thereof are frequently damaged or broken when subjected to any undue strain.

In the embodiment of this invention, the casings and the operative mechanism of the latch and lock-bolt are formed of stamped metal parts adapted for ready assembly in casings of eitherthe rim-lock or mortiselock type and theparts are strong and simple in construction and efiicient in operation.

p This invention resides essentially in a construction of lock mechanism comprising a spring controlled sliding latch, a yoke connected thereto having two rearwardly directed arms with lateral extension plates engaged by opposite curved surfaces on a cam member adapted to be oscillated by the handle-knob and thereby operate said latch, a key actuated loclebolt, the shank of which has two notches and a V-shaped recess on its shank, and a pivotedspring-controlled tumbler having a dog engaging one of the'said notches in the unlocked position and the other notch in the lock position, the said tumbler having outwardly projecting lugs which bear lightly against the cover plate.

Reference being had to the drawings:--- Figure 1 isa plan view of a rim-lock with the cover plate removed.

Figure 2 is a similar view of a mortiselock. i

Figure 3 is a front View of the edge-plate of the mortise-lock.

Figure 4 is a view in rear end elevation, partly in section, of the mortise-lock.

Figure 5 is a view in plan, partly insectlon, of the bolt. i

\FIQUIG 6 is a view in plan and Figure 7 is an e ge view of the tumbler.

Figure 8 is a plan view of the rim-lock oaslng.

Figure 9 is a section on line a-a, and Figure 10 is a section on line b--b Figure 8.

Figure 11 is a view in longitudinal section of the cover plate of the rim-lock.

F gure 12 is a View in plan of a hasp.

. Figure 13 is a section on line 0-0 Figure 12.

Figure 14 is a view in plan of the mortiselock casing.

F igure 15 is a section on line cZ-Z Figure 14:.

Figure 16 is a front elevation of theface plate of the mortise-lock.

Figure 17 is a plan view of the cover plate of the mortise-lock.

Figure 18 illustrates a blank and Figure 19 is a perspective View of the yoke end member of the latch constructed from such blank.

Figure 20 is a view in perspective of the latch. 1

Figure 21 is a perspective view of a guide for the latch shank.

Figure 22 is a View of a blank from which the latch operating cam is formed.

Figure 22 isa view in plan, and Figure 23 is a central vertical section of the latch operating cam. i

Figure 24: is a plan view of a blank from which a handle-knob bush is formed.

Figure 25 is a view in plan, and Figure 26 is a vertical section of the bush.

Figure 27 is a sectional view illustrating ithe Ilaoush fitted into the neck of the handlerno 7Figure 28 is a detail end view of Figure 2 Figures 8 to 17 inclusive, are drawn to a reduced scale.

In the drawings A designates a rim-lock and B a mortise-locln The casing 1 of the rim-lock A has a flange -2forming a seating for acover plate 3 and 'an integral rim flange 4 furnished with slots 5 and 6 to receive the spring-controlled latch 7 and 1ock-bolt 8, and with holes 9 for the reception of screws to fasten the casing in position at the edge of a door or like frame.

The rim flange is blanked at 10 in order that when upturned at right angles to, the casing 1-as indicated by broken lines in Figure 9-to abut against the end of the easing, it conforms to the configuration of the shaped side portions of the lock casing.

The lock casing is formed with holes 11 for the reception, of screws to fasten the same to the face of a door, a key-slot 12, a bearing 13, apertures 1 1,15, 16 and 17 and an inwardly projecting stop 18 for the purposes hereinafter explained.

The cover plate 3 has an inward guide projection 19 for the latch and a hole 20 corresponding in location with the bearing 13 formed in the, casing 1.

The lock casing with integral rim flange 4t is a metal stamping produced by the use of dies in stamping and forming operations. The formation of the bearing, the key-slot, locating apertures, fixture holes, and the stop in the lock casing and the punching of the slots and fixture holes in the rim flange are performed. simultaneously with the prodnction of the casing 1 with integral rim flange from a metal blank by the press operation. The cover plate 3 is likewise produced in the form of a metal stamping.

Thebearing13 receives the boss of a latch operating cam 21, while the apertures 14:, 15, 16 and 17; function as locating points and enable a bifurcated guide 22 for the latch shank, the cover plate supporting boss 23, tumbler pivot pin 24 and a supporting guide pin for the bolt to be riveted to the casing in correct relative operative position.

The hasp 26 is a metal stamping having an integral securing flange 27 produced With guide slots 28 and 29 for the latch 7 andbolt 8 respectively, and with holes 30 to receive attachment screws.

The lock-bolt 8 is preferably made in two parts with its shank having an enlarged outer end fitted into a recess formed. in the head of the bolt and retained therein by a rivet see Figure 5. i

Theshank of the bolt is a metal stamping formed with notches 31 and 32 on one edge toaccommodatea dog 33 of a pivoted tumbler 34. The notch 31 retains the bolt 8 in its unlocked position, while the recess 35) holdssaid bolt in its locked position. An inverted V-shaped recess 35 is formed in the opposite edge of=the bolt. shank to receive the key bit and have a sliding movement imparted thereto.

A lug 36 is formed at the rear of the bolt shank and is adapted to contact with the stop lS formed on the lock casing lto preventfthebolt being forced too far inwardly n unleckinga tio The tumbler 34 has a recess 37 receiving one end of a spring 38 which is passed beneath a guide lug 39 on said tumbler and has its opposite end partially wound around the cover supporting boss 23.

A cam surface 1O is formed in the tumbler for the key bit whereby the turning of the key causes the tumbler to oscillate on its pivot pin 2% and elevate the dog 33 from the retaining notch 31 or 32 in the bolt shank, thereby permitting the bolt 8 to be moved to its locking or unlocking position as required, whereupon the dog 33 of the 11111]- bler engages one of said. notches by the influence of the spring 38.

Lugs 41 on said tumbler project out ardly to form abutments against which the inner surface of the cover plate 3 li itly bears to maintain the tumbler in position when the lock mechanism has been assembled.

The tumbler 3 constructed in the manner hereinbefore described is a. metal stamping ensuring required accuracy of construction consistent with economy in the production of the lock mechanism.

Small projections 12 are formed on the inner surface of the casing 1 and are arranged radially about the key-slot 12. The clefts of the key-bit permit freedom of key action over these projections, but by a roarrangement of the locations of said projections they form obstructions to the movement of a false key, thereby making requisite the use of special keys for different locks.

The cam 21 for actuating the spring-controlled latch 7 is a metal stamping, illustrated in detail in Figures 22, 22" and 23, and. it comprises bosses 13 connected by a bridge or distance piece 414:. Each of said bosses has a square aperture 415 and one of them is provided with oppositely positioned cam pieces 416.

One of said bosses is rotatably fitted in the bearing 13 formed in the c; sing 1, and the other boss is similarly fitted in the hole 20 provided in the cover plate The apertures 45 in the bosses of the cam provide for the accommodation of a latch spiiullc 17 of square cross-section for the operation of the latch 7.

The latch has at its inner end a yoke 48, the side members of which are formed with outwardly extending plates 419 against which the cam members 46 bear. This yoke is constructed from a stamped metal blank (illustrated in Figure 18) which is then bent to the configuration shown in Figure 19. The inner end of the latch shank riveted to said yoke, a hole 50 being provided in the latter for this purpose. If desired, the hole 50 may be tapped and the inner end of said shank screw-threaded to provide for an adjustable connection.

The cam 21 has rotary movement imthe flange 2 of the casing.

nearest parted to. it by theoperation of a handle knob 51 fitted to the latch spindle 47, causing one of the cam members 16 to force the yoke 1-8 rearwardly and draw the latch into the casing against the tension of the spring 52.

A metal bush 53 is sprung into the neck of the handle-knob and is restrained against movement therein. This bush is constructed of stamped metal as illustrated in Figure 24 and comprises two discs 54 and a bridge 55.

Square holes 56 are formed in said discs to receive the latch spindle 47. An arm 57 extending from one disc has a teat 58 which engages with a recess 59 formed peripherally in the opposite disc when the bush is sprung into the neck of the handle-knob as illustrated by Figure 27.

A recess 60 formed in the edge of one of said discs receives a corresponding depression 61 in the neck of the handle-knob at that point where the pinching screw 62 passes and screws into the latch spindle.

The casing 1 of the mortise-lock B is constructed from sheet metal, by stamping operations, as shown by Figures 14 to 17.

In mortise-look constructions the guideplate 4; is not integral with the lock casing, but is constructed as a separate integer. Said guide-plate is secured to the casing by means of projections 63 011 the latter being passed through slots 64 in the former and then riveted.

The cover plate 3 of the mortise-lock is fitted to the casing 1 by means of projections 65 engaging with recesses 66 formed in A fastening screw is then passed through a hole 67 in the cover plate and screwed into the boss 28 riveted to the casing.

A rim-lock is ordinarily of larger outside dimensions than a mortise-lock. Consequently the length of the shank of the latch 7 is shortened by adjustment or otherwise for use with the other components of a mortiselock. With the exception of this one alteration, the mechanism for a mortise-lock consists of the same interchangeable stamped metal parts constructed, assembled and functioning as hereinbefore described with reference to the rim-lock. The invention by this means provides for accuracy of construction, efficiency in operation and economy in manufacture of locks of both types.

The key slot 12 is preferably arranged in a horizontal plane (as illustrated by Figures 1 and 8), instead of being arranged vertioally, in order to prevent accidental displacement of the key from the look by Vibration such as is caused by the slamming actuated latch of a yoke fitted to the end of the latch shank and having two arms extending rearwardly, a rotatable cam member mounted on the latch spindle and having two oppositely positioned curved surfaces in direct operative contact with two outwardly extending plates on the opposite arms of the said yoke, a locking bolt having two notches and a V-shaped recess on its shank, and a spring-controlled pivoted tumbler having a dog engaging one of the said notches in the unlocked position and the other notch in the locked position, the said tumbler having outwardly projecting lugs which bear lightly against the cover plate.

2. In a lock, the combination with a spring actuated latch of a yoke fitted to the end of the latch shank and having two arms extending rearwardly, a rotatable cam member mounted on the latch spindle and having two oppositely positioned curved surfaces in direct operative contact with two outwardly extending plates on the opposite arms of the said yoke, said cam member comprising two bosses spaced apart by a bridge which is stamped integrally with the said bosses, one of said bosses being extended to form a cam.

3. In a lock, the combination with a spring actuated latch of a yoke fitted to the end of the latch shank and having two arms extending rearwardly, a rotatable cam member mounted on the latch spindle and having two oppositely positioned curved surfaces in direct operative contact with two outwardly extending plates on the opposite arms of the said yoke, a handle-knob operating said spindle, a bush for the latch spindle sprung into the neck of said knob, said bush consisting of a metal stamping formed from one strip of sheet metal and comprising two discs, a bridge, an arm extending from one disc, a teat on said arm,

and a recess in the opposite disc engaging said teat.

In testlmony whereof I affix my signature 1n presence of two witnesses.

ALBERT E. MORGAN,

lVitnesses:

JAMES H. ANDERSON, ANDREW W. SMITH.

Images