US878607A - Door-check. - Google Patents

Door-check. Download PDF

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Publication number
US878607A
US878607A US1907400713A US878607A US 878607 A US878607 A US 878607A US 1907400713 A US1907400713 A US 1907400713A US 878607 A US878607 A US 878607A
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United States
Prior art keywords
door
check
knob
cairns
chain
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Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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Inventor
Alexander Cairns
Original Assignee
Alexander Cairns
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Publication date
Application filed by Alexander Cairns filed Critical Alexander Cairns
Priority to US1907400713 priority Critical patent/US878607A/en
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Publication of US878607A publication Critical patent/US878607A/en
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Expired - Lifetime legal-status Critical Current

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    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05CBOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C17/00Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith
    • E05C17/02Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith by mechanical means
    • E05C17/04Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith by mechanical means with a movable bar or equivalent member extending between frame and wing
    • E05C17/36Devices for holding wings open; Devices for limiting opening of wings or for holding wings open by a movable member extending between frame and wing; Braking devices, stops or buffers, combined therewith by mechanical means with a movable bar or equivalent member extending between frame and wing comprising a flexible member, e.g. chains
    • E05C17/365Security chains
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00Closure fasteners
    • Y10T292/28Extension link
    • Y10T292/283Chain

Description

110.. 8783307. PATENTED FEB. 11. 1908.

A. CAIRNS. DOOR CHECK.

, APPLICATION FILED NOV.4. 1907.

Jijzzesses i Invenaf:

ALEXANDER CAIRNS, OF ST. LOUIS, MISSOURI.

DOOR-CHECK.

Specification of Letters Patent.

Patented Feb. 11, 1908.

Application filed November 4:. 1907. Serial No. 400.713.

To all whom it may concern:

Be it known that I, ALEXANDER CAIRNs, a resident of St. Louis, in the county of St. Louis and State of Missouri, have invented a new and Improved Door-Check, of which the following is a full, clear, and exact description.

The object of thisinvention, is to produce an article of simple and cheap construction, that cannot be detached from the opened. door, in opposition to the wishes of the occupant of the room, by an individual on the outside reaching through the opening.

This invention relates to means for checking doors in a partially opened position, in which a horizontally operated chain terminating in a slip loop is used, in connection with a knob and door casing. I

Reference is to he had to the accompanying drawings, forming a part of this specification, in which Figure 1 is a perspective view of my door check in an unused position, and Fig. 2 is a detailed perspective View on a larger scale.

For the purpose of checking doors in the improved manner embodied in my invention, a sleeve l Fig. 2 is provided with a lug 2 and hole 3, to which chain 4 is fastened and on which it is free to move, forming thereby the slip loop 5 onthe inside of knob 6, around knob shank 7, which in conjunction with screw eye 8, effectually checks the door in a manner that does not permit of it being readily detached from the outside.

It will lie evident that this novel adjustable loop, accommodates itself toand be comes tighter and more secure from sudden pushing on the exterior, and that it cannot lie removed from the knob while there is tension on the chain. In this respect it differs from door checks having fixed loops, operated in a similar manner and is what I claim as new and useful.

Having now described my invention, what I claim and desire to secure by Letters Patent is I The combination in a door check, of a chain 4. having a slip loop 5, with a sleeve 1, having a longitudinal bore, connected to the door casing and knob, as set forth.

ALEXANDER CAIRNS.

Witnesses:

Gus D. STEELE, M. K. EAsToN.

US1907400713 1907-11-04 1907-11-04 Door-check. Expired - Lifetime US878607A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US1907400713 US878607A (en) 1907-11-04 1907-11-04 Door-check.

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US1907400713 US878607A (en) 1907-11-04 1907-11-04 Door-check.

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US878607A true US878607A (en) 1908-02-11

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US1907400713 Expired - Lifetime US878607A (en) 1907-11-04 1907-11-04 Door-check.

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Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451708A (en) * 1968-12-04 1969-06-24 Felton D Brooks Security apparatus
US3853343A (en) * 1973-04-16 1974-12-10 Continental Lektroniks Corp Burglarproof chain guard
US4155577A (en) * 1978-06-12 1979-05-22 Raymond Edward L Security device
US4472143A (en) * 1982-04-23 1984-09-18 Bennett Harvey G Method for securing doors, and the like
US4478442A (en) * 1981-07-24 1984-10-23 Martin Edward J Safety lock on entrance door
US4629229A (en) * 1985-08-12 1986-12-16 Frank Correnti Door lock device
US5716084A (en) * 1996-07-31 1998-02-10 Sanford, Jr.; Jack G. Door security system
US20150225989A1 (en) * 2013-01-22 2015-08-13 Celisa Jeanette Edwards Portable lock-down system

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3451708A (en) * 1968-12-04 1969-06-24 Felton D Brooks Security apparatus
US3853343A (en) * 1973-04-16 1974-12-10 Continental Lektroniks Corp Burglarproof chain guard
US4155577A (en) * 1978-06-12 1979-05-22 Raymond Edward L Security device
US4478442A (en) * 1981-07-24 1984-10-23 Martin Edward J Safety lock on entrance door
US4472143A (en) * 1982-04-23 1984-09-18 Bennett Harvey G Method for securing doors, and the like
US4629229A (en) * 1985-08-12 1986-12-16 Frank Correnti Door lock device
US5716084A (en) * 1996-07-31 1998-02-10 Sanford, Jr.; Jack G. Door security system
US20150225989A1 (en) * 2013-01-22 2015-08-13 Celisa Jeanette Edwards Portable lock-down system

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