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Publication numberUS1512939 A
Publication typeGrant
Publication dateOct 28, 1924
Filing dateSep 4, 1923
Priority dateSep 4, 1923
Publication numberUS 1512939 A, US 1512939A, US-A-1512939, US1512939 A, US1512939A
InventorsLedin Charles
Original AssigneeYale & Towne Mfg Co
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
US 1512939 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)

Oct., 28 1924.

. C. LEDIN LOCK Filed sept. 4, i923 3 Sheets-Sheet l Get. 28. 1924.l 1,512,939

c. LEDIN LOCK A Filed sept. 4. 1923 3 sheets-sheet 2- C. LEDIN Loox Filed Sept, 4. 1923 3 Sheets-Sheet 5 Patented @et Z8, 1924.

@NTED STATES 1,512,939 PATENT crains.




To @ZZ whom t may concern.'

Be it known that I, CHARLES LEDIN, a citizen of the United States, and resident of Stamford, in the county of Fairfield and State of Connecticut, have invented certain new and useful Improvements in Locks; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the saine.

This invention relates to improvements in door locks and more particularly to those of the rim type,-0ne object of the invention being to render such locks burglar proof. j

A further object is to provide efiicient means for securing the lock case to the door by the employment of securing means which shall be protected against attack while the bolt is projected.

A further object is to provide a lock structure wherein protection of the cylinder against drilling or being twisted from its mountings or connection with the door and the lock casing, shall be insured.

A further object is to provide simple means for effecting a strong and rigid attachment of a rim lockcasing to the door, so as to render it exceedingly difficult for one to knock the casing 0H the door, especially in view of the fact that the casing would be preferably made of malleable iron.

A further object is to so construct a rim lock and attach its casing to the doorin such manner that the bolt or locking bar shall be operable, when projected, to cover the lcasing fastening screws so as to guard said screws and prevent their removal, and to so construct said bolt or locking bar that access to said screws will be permitted when the bolt or locking bar is in retracted or unlocked position.

A further object is to so construct the vkeeper' or strike member of the lock that provision shall be. made for a wide distrihution of the securing screws, with the consequent advantage of a large amount of wood of the door frame to oer resistance against attempts to draw the keeper or strike member out of the woodwork; so that when a member of the strike or keeper is mortised or set into thewood, added strength shall be provided and the wood caused to oer great resistance against at teinpts to pull the strike oi' keeper from the door frame, and so that access, through the keeper to the end of the bolt or locking bar, by a tool, shall be etectually prevented.

Vith these and other objects in view, the invention consists in certain novel features of construction and combinations of parts as hereinafter set forth and pointed out in the claims.

In the accompanying drawings,-

Figure 1 is a sectional view of a lock structure embodying my improvements.

Figure 2 is a rear face view.

Figure 3 is a face View of the escutcheon or guard plate.

Figure 4 is a sectional view of the samer Figure 5 illustrates the guard to be dis@ posed in the escutcheon or guard plate, for the plug of the cylinder lock.

Figure 6 is a view of the locking bolt.

Figure 7 shows an inside face view of the keeper or strike, and

Figure 8 is an end view showing the lock casing, the front end of the bolt and the reinforcing plate secured to the door.

In the drawings, a portion of a door is represented at 1 and a portion of the door frame at 2,-a casing 3 of a rim lock being mounted on the former and a keeper or strike member 4 being secured tothe latter as more particularly hereinafter explained.

The b olt operating mechanism shown in the drawings may be substantially such as disclosed in patent to 'Reinhold Schoell J une 27, 1922, No. 1,420,760, and hence it is not necessary for the purposesv of this application to describe the details of this mechanism,-suftice it to say however that the bolt or locking bar 5 is provided with an elongated opening V6 which may be enlarged at its ends as indicated at 7 and that said bolt is yprovided near its forward end with a hole 8.

rBhe casing 3 may be provided with a housing 9 to enclose a cylinder lock 10 and the connections between this cylinder' lock and the bolt operating mechanism will be permitted by the elongated slot -oi' opening 6 in the bolt 5.

lnterp'osed between the lock casing 3 and its cover plate 11 and the door, is a reinforcing plate 12 which will preferably be made of hardened steel and provided at one end with a flange 13 which is recessed into the edge portion of the door 1 and secured gi, Y 1,512,939

Vreinforcing plate is secured in position' by means of stout screws 16 having their heads coun-tersunk in the outer face of said plate..

These screws 16 pass through the door and enter threaded bosses 17 projecting inwardly from an escuftcheon or guard plate 18 on the outer face of thedoor,said bosses being countersunk into the WoodofA the door so that turning ofthe plate 18 Will beleillectuf ally prevented. The lockr casing Bis provided interiorly-at its' respective ends With enlargements 19' and 20 and' th'ese'- enlargements arel provided with' holesn for the accommodation of stout' screws 21 andV 22 which enter threaded openings inf-therein'- forcing platel 12 and secure' the casing to said plate,-tlie heads ofithese screws having bearings against thek enlargementsv 19' and 2O in the casing. It' Will'beY observed from inspection of Figure 1, that Whent Ithe bolt 5 is in its projected lposition it Will cover the screws 21 and 22 so as torender it impos- 'sibler to: gain accessY to:v said screws,Y Then the bolt 5' is im its retracted position, one end portion 7 ofthe slot 6 inztlie'bolt: will bc disposed over thehead ofthe screw 21 and hole 8' in` the bolt Avvillbeover the head of the screT 22. The lcasing 3 isprovided near one endV with an opening 23 immediately above or over the screw 21 and the for-Ward portion'` of the casing is provided with an openingv 24' over or in alignment with the screw 22. When the' bolt is in itsl retracted. position, the openings 7 and 8 Will be in alignment respectively with the openingsf23 and 24 in the casingso that a tool maybe passed througlr saidopenin'gs23. and 2%-, the openings in the bolt. andVt engage the.v heads of the screivs21'` and 2-2 for removingfthem to de-tach'tlie casing fromV the reinforcing plateA or for initially securingthe casing to said reinforcingplatei l The escutcheon or guard-plate 18vr is preferablyfmade of hardenedy steelt and has in its inner face a recess25to provide-a seat for one end of a cylinder lock 2,6`located in a suitable opening in the door',-saidY cylinder lock being firmly securedto they reinforcing plate 1 2 by means of a plurality of screws 27. The plate; 18 servesto protect the cylinder of theN lockA 256 against drilling and in order to similarly protect the, plug of the outer .cylinder lock 26, a` steel disk 28 is seatedl inY the innerv face of the plate 18 so as to be in line with the key opening 18a in saidplate and directly over the plug. ofthe lock,-said. disk being loosely mountedv and providedwithaslot 29" for the accommodationi ofV thekey when the latter is inserted into thefplug ofmthelock. The: escutcheon or` guard plate 18' also serves to most rigidly and immovably secure, through themedium of the screws 16 and the reinforcing plate 12, the lock to the door so that it will be eX- Y-ceedingly difficult to knock or drive the lock casing from the door and' it will be observed that the heads ofthe screws 16 are inaccessible When the lock is secured to the door, by reason of the fact that the heads of said screws are covered by the cover plate 11 of the lock casing.

If desired, inorderto prevent the, entrance of dust and dirtV into the; forward portion of the lockcasing, the hole;2&--hereinbef0re referred to, may be closed by ascrew plug'SO.

The keeper, or strike/#Lis madegholloiv and provided; With: a slot 311for thee-accommodation of the bolt 5 and Wit-hinY said hollow keeper, a seat 32' is provided' fon thefendf of the bolt. The-outer wallofthe' keeper-may be beveled or provided with-beveled portions 33'to assist in directing; the forward end of the bolt 5 to its seat and the back- Wall Sillof the keeper is closed so astio-prevent access to the end of the b olt Withtheuse of a driving tool. The keeper or strike member' tis provided with a dovetail flange orapron 35 which is mortised or' recessed` intothe`v Wood of the door frame` 2 and per'foratedfor the accommodationvof fastening screws 36.V 'Y By thus forming the apron ofthe keeper, provision is made for a Wide.distributioniof.` the fastening screws and the Wood ofthe frame Will be rendered capable of exert-ing. great resistance against attemptsto pull the keeper member from the'door frame. Y

Having'fully described my invention What I claim as new` and desire to secure by Letters-Patent, is: Y

1. TheV combination withA the casingl offa .rim lock andI an outer escutcheon. or. guard plate, of? a reinforcingplate to be disposed ,between the lock casing andf a, door,` bolts connecting said, reinforcing plateI and escutcheon or-guard plate, and4 normally concealed fastening4 means securing the casing to said reinforcing plate. p

- 2. The combinationv with. the casing of a rim lockand aslidingfbolt, of. a reinforcing plate, means normally concealedby saidbolt when projected for securing the casing to said reinforcing plate, an outer escutclieon plate, and fastening means adapted topass through a` door and connect-ed ati respective ends with' said. reinforcing. plate and said escutcheon. Y

3. Thel combination. Withthe casing. off a rimloclranda sliding bolt, of a reinforcing plate, meansn normally 4concealed by said bolt when projected for securing. the casingA to said reinforcing plate, an outer escutcheon plate, fastening means adapted, to pass through a door. and connected at, respective ends with said: reinforcing plate andf, said escutclieon, and said bolt and `casing having openings to align with each other' over the fastening means for the casing to the reinforcing plate when the bolt is in retractedposition.

4. The combination with the casing ofv a rim lock and an outer escutcheon plate, of a reinforcing plate to be interposed between the locking casingl and a door, fastening devices for securing the lock casing to the reinforcing plate, fastening devices connecting said reinforcing plate and escutcheon plate, and a cover plate for the casing concealing said last mentioned fastening devices.

5. The combination with the casing of a rim lock and an outer escutcheon plate, of a reinforcing plate to be interposed between the. lock casing and a door, means for securing the lock casing to said reinforcing plate, means for securing the reinforcing plate to the escutcheon plate with the door interposed between said plates, and means whereby all of said securing means may be concealed.

6. The combination with the casing of a rim lock and an outer escutcheon plate, of a reinforcing plate to be interposed between the lock casing and a door and provided at one end with a flange to be recessed into and secured to the free edge of the door, means for securing the lock casing to said reinforcing plate, means for securing the reinforcing plate to the escutcheon plate with the door interposed between said plates, and means whereby all of said securing means may be concealed.

7. The combination with a rim lock and a cylinder lock connected with the bolt work of said rim lock and adapted to be disposed in an opening in a door, of a reinforcing plate to be interposed between the casing of the rim lock and the door, means for securing said casing to said reinforcing plate, a guard plate to be disposed in front of said cylinder lock and constitute an armor for the latter, and securing means connecting said guard plate and reinforcing plate,

8. In a lock structure, the combination of a plate to be disposed against the inner face of a door, a cylinder lock to be mounted in securing means connecting said escutcheon or guard plate and reinforcing plate, said escutcheon or guard plate having an opening in line with the plug of the cylinder lock, and a hardened metal disk seated in said opening in front of the plug of the cylinder lock and having a key slot.

In testimony whereof, I have signed this specification in the presence of two subscribing witnesses.



Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2417756 *Mar 2, 1944Mar 18, 1947Batesville Casket CompanyCasket locking and sealing means
US2751824 *Apr 17, 1953Jun 26, 1956Cushman Chuck CompanyClamping device
US3706212 *Jul 26, 1971Dec 19, 1972Richard E MiddletonLock mounted with blind fasteners
US3768284 *Jun 29, 1972Oct 30, 1973R KentMaximum security lock assemblies
US4658611 *Jul 9, 1985Apr 21, 1987F. C. Brown (Steel Equipment) LimitedLocking member incorporating a cam lever lock and a sliding bolt
US4854142 *Jul 15, 1987Aug 8, 1989Daimler-Benz AktiengesellschaftAntiremoval device for a locking mechanism
US4861079 *Dec 3, 1987Aug 29, 1989Deforrest William SrMulti-purpose lock bolt
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CN100476151CFeb 22, 2001Apr 8, 2009班哈姆专利锁具有限公司
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U.S. Classification70/134, 70/DIG.570
International ClassificationE05B17/20, E05B9/08
Cooperative ClassificationY10S70/57, E05B9/082, E05B17/2084
European ClassificationE05B9/08B, E05B17/20G