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Publication numberUS913700 A
Publication typeGrant
Publication dateMar 2, 1909
Filing dateNov 12, 1908
Priority dateNov 12, 1908
Publication numberUS 913700 A, US 913700A, US-A-913700, US913700 A, US913700A
InventorsWilliam W Cornman
Original AssigneeJohn H Maginn, William W Cornman
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Door-locking device.
US 913700 A
Abstract  available in
Previous page
Next page
Claims  available in
Description  (OCR text may contain errors)



Patented M21112, 1909.

wmfs nnrirnn srarns WILLL'iM w. commas, or CHICAGO, ILLINOIS, ASSlG-NOR or ONE-HALF To JOHN Ii. moms,

. or CHICAGO, rumors.


no. sispco;

Spocificstion of Letters Patent.

Patented Mazda 2, 1999.

Application filed Novembw 12, 19%. Serial No. 53 272.

To 01 5 it may concern:

Be it known that I, WnuAM W. CORN- nmn, u citizen of the United States, residing at Ghicsgmin the county of Cook and State of Illinois, have invented certain new and useful improvements in Door-Locking Devices, of which the following is a specification. 3

-The invention relates in general to a door locking device for a plurality of doors, but pertains more in particular to a lock adapted-to be released by compressed air or in cross section.

a compressed fluid, and means for springing tho'lock when the door is in a closed position.

. The principal object of the invention is to provide locks adapted to be connected to a plurality of doors and having a. common pipc'eds-ptod to carry com rcssed air and conmcted to each lock where y all of the doors such as on s trsin of cars may be simultaneously unlocked.

@th'er objects of invention will appear throughout the spszification and are shown in the dmivings in whici Figure l is o. side elsvstionsl view of the device applied to a body member, with parts broken and other part in section. Fi 2 is a top plan View of the device in loo ed position, the door and body members to which the device is applied being shown Fig. 3 is a crossrsectional view of a refrigerator door consisting of two doors hinged to swin outwardly with my improved device app ied thereto. Fig. 4 is a sectional view on the line 4+4 of Fig. 3.

Referring now more particularly to the drawings, 5 represents a base plate, referably composed of metal, and adapte to be secured to a body member 6, such as a side wall of is car, by means of the screws 7.

Preferably. formed integral with, said base plate 5 is 2. cylinder 8, but it is obvious that the cylinder might be formed separate and secured to the base plate in any suitable manner. lhe cylinder 8 is provided with a cylinder head 9 having an externally threaded boss 10 formed integral therewith and adapted to coiiperate with the internal threads 11 at the end of said cylinder; said cylinder head being suitably aperturcd for the sliding of a pis ton rod thoi'ethrough, which will be hereinafter (188511: l. The opposite end of ssid cylinder from said cylinder head 9 is preferably in an unmuar neck portion 13 that is internolly threaded at 14. A cylinder head 15 is provided with an externally threaded boss 16, the threads thereon being adapted to cooperate with the threads 1-1; said cylinder head 15 also being suitably apertured for the sliding of the piston rod therethrough. The piston rod 17 is longitudinally and axially disposed within said cylinder and of greater length thereof and carries a piston head 18 and a stop member 19, that is preferably of annular form, and adapted to abut against the shoulders 20 formed within the cylinder. Backing said piston head 18 is a coiled spring 21 interposed between said piston head 18 and said cylinder head 9, the normal tension of said spring being to force said piston head away from said cylinder head 9. Near one end of said piston rod 17 an annular beveled surface 22 is formed terminatin in an abrupt shoulder 23, whereby ahead member 24 is formed at the end of said piston rod.

Secured to the base late'is a guide-way 25 carrying a vertical y slidable latch 26 that is provided with an end piece 27 having a beveled surface 28 corresponding substantially with the beveled surface 22 as to the angular disposition, whereby when the piston rod is moved to the left, as Sl'lOWll in Fig. 1, the end piece 27 will spring behind the shoulder 23 and prevent the movement of the piston rod to the left. As a means for moving the end piece from behind the shoulder 23, a stud 29 is secured toihe latch 26 in any suitable manner, and by raising the stud. 29 the end piece will be drawn free from the shoulder 23 and the piston rod is forced outward from said piston under the action of the spring 21. Hand means 30 are provided at the o posite end of said piston rod, from said diead 24:, drawing the shoulder into engagement with the end piece, as by moving the piston rod' to the right, as shown in Figfll, until the end piece is forced behind the shoulder 23. The piston rod is adapted to be moved into an unlocked position by any form of fluid pressure, but preferably by compressed air that is forced against said piston head 18, and for admitting compressed air or the like into said cylinder 2. branch air pipe 01 is beveled at 12 and terminates adapted to be secured to said cylinder at any suitable point between the piston head and beveled end thereof.

It is of course obvious that a single air pipe for a series of doors would be sutticient with a branch pipe leading to each air lock.

in Fig. 2, 32 is a key member having a recessed, or counter-sunk portion 33 at one end. thereof adapted to receive the head member oi. the piston rod 17; said key member being-0t suliicient' length to extend transversely through a door member 34: and through the body member (3, suitable apen tures 35 being provided in said door and body members that are adapted to register when the door member is in closed position and through the key member. The key member 32 may be connected to the door body by means of a chain 36 secured to the door body and to the key member by means of a ring 37 passed through a suitable aperture 38 at one end ofsaid key. i tpcrtures 39 are also formed through the door and body members in horizontal alinement with the stud 29 whereby when the piston is in such a position that the end piece 27 is behind the shoulder 23, a suitable instrument can be inserted through the door and body members for raising the end piece 26 and releasing the piston rod.

The operation of the device, as just de scribed, is as follows: When it is desired to lock the car or other body member, the door member is moved into its closed position, bringing the apertures and 39 into aline ment, whereupon the key member 35 can be inserted through the apertures, bringing the counter-sunk portion 33 at the end of the key into alinement with the head member 24 of the piston 17. The party then having charge of the car or other member, applies a suitable instrument through the apertures 39 to the stud 29 to lift the latch 26,

removing the end piece 27 from the shoulder 23, whereupon the piston will be forced from the cylinder under the action or the spring 21 until its head seats itself within the socket or countersunk portion It can therefore be readily seen that after the parts are in the position as j ust described the horizontal movement of the key member relative to the door and body members is prevented, and also that the longitudinal movement oi. the door member relative to the. body member is prevented by means of the key 32.

When it is desired to release the lock, the party having control of the air line of the car, which maybe the engineer of a train, permits the air to enter the cylinder through the branch pipe 31 which forces back the piston head 18 against the action of the spring 21 until the end piece 27 is forced behind the shoulder 23thereby drawing the head member 24 free from the key and holding the same free thereof. When the piston rod is released by the latch the annular shoulder 19 abuts against the shoulders 20 to limit the outward movement of the piston rod so that the same will not strike the key member with too great force, and the shoulder it) also is prevented from striking the shoulder 20 as the air is driven within the beveled end of the piston and acts as a cushion to break the force with which the shoulder 19 strikes the shoulder 20. it it; is desired to release the look from the interior of the car, this can be accomplished by grasping the handle 30 on the piston 1 fl so as to seat the end piece 27 behind the s inlder 23.

The above device, as just described, is thepreferred embodiment ofthe invention, but it obvious that the same is not limited in use to a construction wherein the door member is adapted to sliderelative to the body member. 'lherct'ore a modified form of construction has been shown in Fi s. 3 and in which 40 and 41 represent a style of door such as is used upon refrigerators, {t2 representing the body oi a refrigerator and 43 the hinges for the doors 40 and 41; A handle 44 is secured to the door in the usual manner, such as by extending the same transversely through the door to provide a pivotal section 4-5 that is formed integ al with an extended handle portion d6 on the interior of the refrigerator or the like. It is of course obvious that the pivotal section 45 might be made separate and the handle portions 4:4 and i secured thereto, said pivotal section extending transversely through one of the doors whereby a movement'o'f either handle will move the other handle. The extended handle portion 46 is provided with a suitable counter-sunk portion 4? at one end thereof, which is adapted to be brought in horizontal alinement with the head member of the piston 17 when the doors are in closed position. The base plate and cylinder thereon are secured to the refrigerator body 42 and a guide men'iber 4-8 is also secured to said body portion into which the handle portion 4-6 is adapted to be guided and to limit the downward movement of the handle portion 46, whereby the countcr-slmk portion at the end thereof is brought into horizontal alinement with the head member 24. An aperture 49 corresponding to the aperture 39 is formed through the refrigerator body in order that the lock may be sprung. The operation of this device is as follows: Assuming that the handle 44 is in a vertical position relative to the door, said doors can be swung outward on their hinges as the bolt head will not then engage the handle portion 46, and when it is desired to lock said doors, the same having been closed, the handle is turned so to bring the countersunk portion 47 into horizontal alinement withtheheadniemberQ, whereupon the lock invention is limited to the two door concombination of cured to a body member, a piston rod therein structions herein shown, as it is obvious that the general principal of the invention is an plicable to an vform of door, and while'the preferred em odiment of the invention is erq'n shown, except as to minor details, it is of course understood that various changes might be made without departing fron'i the broad general spirit.

I claim:

1. In aloclring and releasing device for a door, the combination of a cylinder, a piston rod having a piston thereon slidably mounted within said cylinder, means for normally forcing one-end of said piston rod outward from said cylinder, means for admitting a compressed fluid substance into said cylinder, and a keyimember adapted to engage said door and having a recessed portion into which one end of said piston rod is adapted to extend substantially as described.

2. In-a lockin and releasing device for a door, the comblnation of a cylinder connected with a fluid supply, a piston rod within said cylinder having a piston thereon, means for normally pressing one end of said piston rod outward from said cylinder, and means independent of said piston rod, adapted to engage said door and one end of said iston rod whereby the movement of said oor is prevented, substantially as described. I

3. In a locking and releasin device for a door, the combination of a cy inder having a piston rod ands piston therein, said piston rod being of greater length than said cylinder, means for normally forcing one end of saidpiston rod outward from said cylinder,

means for admitting a fluid substance within said cylinder, and a key member adapted to extend through said door and having a counter-sunk portion into which one end of said-"piston rod is adapted to extend, and means for holding said piston rod free from said key, substantially as described.

4'. I11 a lockingand releasing device, the a cylinder adapted to be schaving a piston, said piston rod being of greater 1e th than said cylinder, a spring mterposed etween said piston and one end of said cylinder to normally force one end of said piston rod therefrom, a head member secured to said piston rod, anda key member adapted to extend transversely through said having recess door and body member and member on said ally withdrawing said cylinder, a latch adapted to engage piston rod is adapted to project, whereby the door member is prevented from moving relative to said body .member, substantially as described. i

In a locking and releasing device, the combination of a cylinder adapted to be socured to a body member, a piston rod having a piston thereon slidably mounted within said cylinder, a head member and a shoulder on said iston rod, a spring interpos :1 be tween said piston andone end of said cyllnder to normally force said head member away from said cylinder, a latch in operative position with relation to said cylinder and adapted to engage'the shoulder on said piston rod to firmly hold said head men'iber toward said cylinder when said 5527111. compressed, and a key member adapted to extend transversely through said door and body member having a suitable cut away portion into which said head member is adapted to project, whereby the laterz-il or longituinal displacement of the door m on ber relative to the body member is prevent and means for engaging said latch mom exterior of the door, substantially as described. I

6. A locking and releasing device for doors, comprising a cylinder adapted tojoc' 'said door and body ,member when said door member is in a closed position, and a recess formed in said key member at one end thereof and into which the head member on said piston is adapted to extcnd, whereby a'lat oral or longitudinalmovement of said member relative to said body member is vented, and means on said piston for in:

said head member from said key member, substantially as describec 7. In a locking and releasing devict combination oia cylinder adapted to cured to a body member, a piston l al'ilymountcd withiir said cylinder an ing piston l'hereon, a spring interpos hr.- tween said piston and one end of said cylinder for normally. pressing one end of said piston rod away from said cylinder, a fluid.

supply pipe secured to said cylinder and in communication with the interiorther of, a shoulder formed on said pistonexterior o saoulier to hold said piston rod in an '1.

; horizunla] nlinement with the end of said i locked position, a key member adapted to released and the end of said piston rod enextend transversely through registering gage sald key member, substantially as and 10 apertures formed in said door and body i for the purposes described.

members and having a recessed portion 111 UL-LIAM CORNMAN. pision rod, registering aperti res yhroughi 'ituesses:

said deer and body members 1n ahnement i JAMES R. OFFIELD,

with said hitch, whereby smd latch may be i M. E. ADAMS.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2466855 *Aug 1, 1947Apr 12, 1949J M HofferFreight car door lock
US2718239 *Jul 8, 1952Sep 20, 1955Weston Electrical Instr CorpSafety arrangement for pressure vessels
US4005885 *Feb 11, 1976Feb 1, 1977Austin Jr George KRemote controlled door and window
US4465311 *Oct 19, 1981Aug 14, 1984Austin George KRemote control locking system
Cooperative ClassificationE05B63/128