US807779A - Safety-chain for doors. - Google Patents

Description

No. 807,779. PATENTED DEC. 19, 1905. C. D. RINALD.

SAFETY CHAIN FOR DOORS.

APPLIGATION FILED AUG.a,19o5.

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einnEN'r D. RiNALD, "0F PHiLADNLPHA, 'PNNNS'YLVNNlN SAFETY-CHAIN FOR DOORS.

Nascar/79.

To all whom t may concern:

Be it known that I, CLEMENT D. RINALD, a citizen of the United States, residing in Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Safety-Chains for Doors, of which the following is a specification.

This invention relates to safety-chains for doors-viz., chains designed to permit only the partial opening of the doors to which they are applied after said doors have been unlocked in order to prevent the entrance of undesirable persons.

The object of the invention is to provide improved means whereby the safety-chain maybe released from the outside by means of a key, `s`o that the occupants of the house may gain access to the same when such chain is in use.

Vith this end in view the invention consists in the novel features, arrangements, and combinations of parts to be hereinafter described and claimed.

In the accompanying drawings, Figure l represents a front elevation of a door with my improved safety-chain shown in position thereon. Fig. 2 is an outside elevation of that part of the door where the lock and safety-chain are applied. Fig. 3 is a vertical vtransverse section on line 3 3, Fig. 1, drawn on a larger scale; andFig. 4 is a tightly-closing front view showing the safety-chain in use for the door.

Similar letters of reference indicate corresponding parts in the different figures of the drawings.

Referring to the drawings, A represents a door, B the door-frame of the same, and C a safety-chain which is attached at one end to a stationary staple C on the j amb of the doorframe in about the same position as the ordinary safety-chains. The opposite end of the chain C is provided with a snap-hook C2, which is attached when the chain is used to the interiorly-disposed downwardly-pivoted shackle D of a lock D, which is set in a mortise extending through the door. The shackle D is disposed at the inner end of the lock and `at right angles to the door, as shown, while the keyhole is located at the outer end of the lock, and is covered by an escutcheon D2. When the safety-chain is used in the ordinary manner, the snap-hook C2 is inserted into the closed shackle D of the door, so as to permit thereby the partial opening of the Specification of Letters Patent.

77,4/ Application led August 8, 1905.

Patented Dec. 19, 1905.

Serial No. 273,274.

door to see who desires admission from the outside. When the door is to be opened, the snap-hook is released from the shackle. In case any one living in the house desires to come in from the outside at any time during the day or night and nds on opening the door with his regular key that the safetychain C is applied to the shackle D so a: to lock the door he inserts an auxiliary key D3 into the lock D from the outside and withdraws the latch e of the lock from the recessed end of the shackle D. A spring e acting on the heel f2 of the shackle will then immediately open the latter and hold it in the raised position, (shown in dotted lines in Fig. 3,) so that the snap-hook with the chain slips olf of itself and drops from the shackle into a pendent position along the amb of the door, so as to permit the opening of the same. When the safety-chain is desired to be placed in position for locking the door, the snap-hook is slipped over the shackle D', and the latter is then closed or the same D is pressed back into locked position and the snap-hook connected thereto in the usual manner.

To one of the links of the chain, about equal to the distance of the keeper C from the shackle D, is applied asmall ring or snaphook (Z, which can be inserted directly onto the snap-hook C or the shackle D', so that the chain C when thus applied fits taut across the door from the keeper to the bail, takes up the slaclgof the chain, and holds the door closed, so that it cannot be opened even for an inch or so. The safety-chain serves then also as a locking device for the door and can only be opened and detached by the special key made for releasing the shackle. regularlock and key can therebybe dispensed with and the door be locked by the chain and opened by releasing the shackle by the key from the outside or by detaching it from the shackle from the inside. In some cases, such as rear doors, this safety arrangement would be su'liicient for locking and unlocking the door, so that the expensive door-lock could be dispensed with.

Having thus described my inventionflclaim as new and desire to secure by Letters Patentl. The combination, with a door anddoorframe, of a safety-chain attached at one end to the latter, and an eXteriorly-operable lock embodying an interiorly-disposed shackle over which the opposite end of said chain is fitted.

The

Q sezwe i 2. In a device such as described, the 00m- In testimony that I claim the {Greg-Omoas blnatlon, With a safety-chain attached t0 the my invention I have sign'edmmy mam) in d0or-frame, of an exteriorly-operable lock presence of tWo subscribing with@ sses. mortised in the door and embodying an intel 7. 5 riorly-disposed downwardly-pivoted shackle CLEMENT D- RLY- LiiU. K i over Which said chain is fitted, said look also Witnesses: Y g v i embodying self-acting means for raising said GEO. R. VAN ZANDT,

shackle When the same is released. CHARLES H. HABEL.

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