US904683A - Lock for doors, cupboards, and the like. - Google Patents

Description

H. J. GUWELL. LOCK FOR DOORS, GUPBOARDS, AND THE LIKE.

APPLICATION FILED SEPT. 7, 1904.

Patented Nov. 24, 1908.

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HENRY JAMES COWELL, OF ADELAIDE, SOUTH AUSTRALIA, AUSTRALIA.

LOCK FOR DOORS, CUPBOARDS, AND THE LIKE.

Specification of Letters Patent.

Patented NOV. 24, 1908.

Application filed September 7, 1904. Serial No. 223,592.

To all whom it may concern:

Be it known that I, HENRY JAMES CowELL, architect. a subject of the King ot' Great Britain and Ireland, residing at 75 King William street, Adelaide, in the State of South Australia, Commonwealth ot' Australia. have invented a certain new and useful Improved Lock for Doors, Oupboards, and the Iiike, of which the following is a specitication.

My invention relates to an improved lock tor doors, cupboards and analogous purposes, the special object of the same being to provide au appliance which shall be comparatively simple and inexpensive in construction and at the same time be capable otl being` more easily fitted in position than is the case with the majority oit locks at present in use.

In carrying my invention into ettect the casing is made more or less tubular in form so that it can be fitted into a cylindrical shaped hole drilled into the door or cupboard by means ot an auger or other convenient appliance and the internal mechanism of the lock so designed that the bolt can readily be reversed so as to apply the fitting to either a. right or lett handed door, the handle being capable ot turning in either direction.

In order that my invention may be the better understood I will now proceed to describe the same by aid ot the accompanying illustrations in which Figure l is an external elevation oi:l the lock. Fig'. 2 is an end view ot' same. Fig. 3 is a sectional plan. Fig. 4t is a side view ot bolt. Fig. 5 is a side view ot lock with portion o't casing removed and bolt projecting. Fig. (3 is a similar view ot' lock but with bolt withdrawn. Fig. T is a similar view ot lock with handle in reversed position, the locking mechanism being omitted and a modication in shape being illustrated. Fig. S is a cross section of tube or barrel of lock. Fig. 9 is a detail of mechanism showing the appliance in unlocked position. Fig. l is a detail of mechanism showing the appliance in locked position. Fig. 1] is a detail o't' alternative or equivalent locking mechanism in unlocked and locked positions. Fig. l2 is a modiiication of connection between handle barrel and bolt in side elevation, end view and plan.

Similar letters et' reference are used to denote similar or corresponding parts wherever they occur throughout the drawings.

In this drawing a is the outer casing of the lock which is provided at the ends with the back plate and the tace plate c, the latter having holes drilled therein for the reception otI fastening screws. The casing is more or less cylindrical in section as shown and consists ot' a front and back portion the two parts being held together by the screw (l passing through thc hole fl and are further secured by a small lug or projection c on the front plate which tits into a corresponding recess in the tace plate c, Fig. 3.

The metal bolt is shown at and is arranged to pass through the tace plate and works within a suitable guide or recess in the iixed bridge g finally terminating in the tceshaped extension /i.

A metal compression spring j is coiled round the recess portion of the bolt and taking a bearing against. the tixcd bridge 5'/ presses against a shoulder termed by the recessed portion oit the bolt l.: is a grip plate which tits behind the eX- lension Il. ot' the bolt and is pivotally joined to the rollback Z by means ot' the bent connecting rod m. a lug being provided on the barrel through which a pin or rivet is passed t'or the retention oit the connecting rod.

In Fig. l2 I have illustrated a inoditication or simpliiied torni ot this mechanism wherein the bent connecting rod is dispensed with and in lieu thereof a grip plate having a lever integral. therewith is used as indicated b v the letters /.'-/nl as will be readily undersl ood on reference to the drawings.

The casing may be cut away both at top and bottom as indicated at n in order to enable the rod to work without impediment when the handle is turned to the right or left, and on reference to Fig. 3 it will readily be understood that the bolt is reversible for right or lett handed iittings as indicated by the dotted lines.

An iniportant feature in my invention consists ot' the locking gear which is characterizcd by its cxtreme simplicity. A plate 0 is fastened to the side ot' the barrel, or vformed integral therewith, to attord a suitable bearing for the sliding' parts, a key hole being provided at y) for the reception o'tl an ordinary key. q is the lock-slide or tumbler which is held in position by the screw r, which engages the slotted portion s, a rest pin being fixed at t for supporting and holding the lock.

In Fig. 9 the appliance is shown in an unl locked position, but when the key is turned i influence in the opposite direction restores in the direction of the arrow 1t lmpinges l the bolt to its normal position.'

upon the projection 'u and lifts the lock-slide.

or tumbler upwards and forwards so as to enable the rest pin t to engage in the recess v where it is held by aid ot' the spring w as illustrated in F ig. l0. lt will readily be seen that in this position the lock-slide or tumbler butts against the tee-shaped eXtension /L ot' the metal bolt thus preventing it trom being drawn baclovards by means ot the handle.

Qi mechanical equivalent of the above described locking gear is illustrated in two positions in llig. ll, but the recess y'u on the sliding` plate being in a somewhat ditlerent position to that described in the preceding lignres instead oi' engaging with a rest pin on the body ot the loci; engages with a` corresponding projection upon the back of the iandle barrel thereby preventing the same from being revolved. ln this modilication the helical spring g/ on the side oit the slide performs a similar function to the spring QU previously mentioned by keeping the slide in proper position. A small beveled bar or projection is termed or iixed on the body of the lock and engages in a slight recess on the back ol' the slide when unlocked in which position it is maintained by the influence of the helical spring so as to prevent any accidental movement ot the slide.

ln lfig. 'T lit will be seen that the back plate dispensed with the end ot the barrel being rounded ott' illustrated.

The application and use of my lool; may be briefly described as tollows2-By means of an anger or other suitable tool a hole is drilled for the reception of the barrel of the lock and the appliance is then held in position bv the screws which pass through the ilush plate` further holes being cut for the passage of the handle and the hey. The turning of the handle either forwards or baclm'ards causes the lever to draw the bolt backwards by the intermediate action ot the grip plate 7c, or by the more direct mechanism shown in Fig. l2, but as soon as the handle is released the spring exerting its lt is to be understood that I do not contine myself absolutely to the sine or shape ot the details shown in the accompanying drawings but that the same may be modilied within reasonable limits.

rlhe internal mechanism is particularly applicable to ordinary household fittings and doors and may be applied generally to mortice locks and rim locks. By removing the grip plate and the roll back both ot which are readily detachable the bolt can easily be lifted out of the bridge and lace plate and returned again in a reversed position so as to render the lool; adjustable to whichever direction the opening of the door is to be applied.

laving new particularly described and ascertained the nature ot' my said invention and in what manner the same is to be performed l declare that what l claim is l. A lock comprising a casing, a bolt having a tee shaped rear end, a plate having a forked end bent at right angles engaging said tee shaped end7 a handle barrel having a lug` thereon and a bent. lever connected at one end to said lug and at its other end to the plate.

2. A locl comprising a casing having a bridge g therein, a bolt having an enlarged head and a tee shaped end, a spring having one end bearing against the said head and the other against the bridge, a plate having a forked end bent at right angles engaging said tee shaped end, a handle barrel, a bent lever connecting said barrel with the plate, a sliding plate, a key for moving the same to prevent movement of the betere meptioned parts and means tor holding the sliding plate in its forward and rearward positions.

ln witness whereof l have hereunto signed my name in the presence of two subscribing vitnesses.

HENRY JAMES COW/TELL. lllitnesses z JOHN HERBERT COOKE, JAMES F 1N env.

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