US1825283A - Door latch - Google Patents

Door latch Download PDF

Info

Publication number
US1825283A
US1825283A US274995A US27499528A US1825283A US 1825283 A US1825283 A US 1825283A US 274995 A US274995 A US 274995A US 27499528 A US27499528 A US 27499528A US 1825283 A US1825283 A US 1825283A
Authority
US
United States
Prior art keywords
latch
door
weight
door latch
guide
Prior art date
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
Application number
US274995A
Inventor
Prentice John
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Babcock and Wilcox Co
Original Assignee
Babcock and Wilcox Co
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Babcock and Wilcox Co filed Critical Babcock and Wilcox Co
Priority to US274995A priority Critical patent/US1825283A/en
Application granted granted Critical
Publication of US1825283A publication Critical patent/US1825283A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • E—FIXED CONSTRUCTIONS
    • E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05C—BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C3/00—Fastening devices with bolts moving pivotally or rotatively
    • E05C3/12—Fastening devices with bolts moving pivotally or rotatively with latching action
    • E05C3/14—Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member rigid with the latch
    • E05C3/145—Fastening devices with bolts moving pivotally or rotatively with latching action with operating handle or equivalent member rigid with the latch pivoting about an axis perpendicular to the wing
    • Y—GENERAL 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
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T292/00—Closure fasteners
    • Y10T292/08—Bolts
    • Y10T292/1043—Swinging
    • Y10T292/1063—Gravity actuated
    • Y10T292/1064—Operating means
    • Y10T292/1072—Rigid

Definitions

  • Fig. 1 is a front view of the device
  • Fig. 2 is an end view of the same viewed along the line 2-2 of Fig. 1.
  • reference character 1 indicates a wall upon which the door is mounted. The wall is provided with a flanged opening 2 with the front edge or face sloping as most clearly shown in Fig. 2.
  • the door 3 is provided with hinges 4 and is mounted upon a hinge pin 5 that is installed at a slight angle to the vertical so that the door will tend to close by gravity when it is opened less than 90.
  • a latch 6 is pivoted to the door at one end as shown at 7 and a handle 8 for the latch is provided near the other end.
  • a catch 9 is attached to the wall 1 by means of the bolts 10 and is provided with a notch 11 into which the latch 6 is caught when the door is closed.
  • a latch guide 12 is attached to the door 3 by means of the bolts 13 and carries a cylinder 14.
  • the cylinder 14' has its upper end closed and its lower end open. It serves as a guide for a weight or plunger 15 that is located above the latch 6 so as to come into contact with the upper edge thereof.
  • the weight or plunger 15 is shorter than the distance from the upper edge of the latch to the closed end of the cylinder 14. It is not necessary to have the'guide for the plunger 15 attached to the guide 12 as it may be attached to the door itself. It is sufficient to perform its function if it merely permits the weight to ride loosely upon the latch 6 and return to normal position at the proper time.
  • the loose plunger or weight 15 is provided to cause the latch to seat completely in the notch due to the fact that when the door is slammed and the latch 6 rides upon the sloping surface 16 of the catch 9, it is moved upwards suddenly, thus throwing the weight 15 upwardly into the cylinder 14 so that when the latch 6 reaches the posi- 2.
  • a door having a latch pivoted at one end with its other end free to move in a vertically disposed plane, a guide on said door, a weight movable in a vertically disposed plane guided by said guide and adapted to contact with said latch, and a stop to limit the upward movement of said weight, said stop being positioned so that said weight can move upwardly after said latch has reached its uppermost position.

Description

J. PRENTICE Sept. 29, 1931.
noon LATCH Filed May 4, 192a lNVENTOR M ATTORNEYJ Patented Sept. 29, 1931 UNITEDSTATES PATENT OFFICE JOHN PRENTICE, OI BAYONNE, NEW JERSEY, ASSIGNOR TO THE B ABCOCK & WILCOX COMPANY, OF BAYONNE, NEW JERSEY, A CORPORATION OF NEW JERSEY DOOR LATCH Application filed May 4, 1928. Serial No. 274,995.
This invention relates to a fastening device for a door that operates in such a manner that the danger of the door becoming accidentally opened is minimized or entirely avoided. The invention is especially applicable to furnace doors where there is danger of the doors being blown open by explosion in the furnace but is not restricted to this particular use. The invention will be understood from the description in connection with the accompanying drawin which Fig. 1 is a front view of the device, and Fig. 2 is an end view of the same viewed along the line 2-2 of Fig. 1. In the drawings reference character 1 indicates a wall upon which the door is mounted. The wall is provided with a flanged opening 2 with the front edge or face sloping as most clearly shown in Fig. 2.
The door 3 is provided with hinges 4 and is mounted upon a hinge pin 5 that is installed at a slight angle to the vertical so that the door will tend to close by gravity when it is opened less than 90. A latch 6 is pivoted to the door at one end as shown at 7 and a handle 8 for the latch is provided near the other end.
A catch 9 is attached to the wall 1 by means of the bolts 10 and is provided with a notch 11 into which the latch 6 is caught when the door is closed. A latch guide 12 is attached to the door 3 by means of the bolts 13 and carries a cylinder 14. The cylinder 14' has its upper end closed and its lower end open. It serves as a guide for a weight or plunger 15 that is located above the latch 6 so as to come into contact with the upper edge thereof. The weight or plunger 15 is shorter than the distance from the upper edge of the latch to the closed end of the cylinder 14. It is not necessary to have the'guide for the plunger 15 attached to the guide 12 as it may be attached to the door itself. It is sufficient to perform its function if it merely permits the weight to ride loosely upon the latch 6 and return to normal position at the proper time.
It has heretofore been found in devices of this character that the latchsometimes.
fails to become seated sufliciently in the notch which holds the door closed with the result that the door can be forced open by pressure from the inside. Merely increasing the weight of the latch does not overcome the difiiculty. By the present invention the loose plunger or weight 15 is provided to cause the latch to seat completely in the notch due to the fact that when the door is slammed and the latch 6 rides upon the sloping surface 16 of the catch 9, it is moved upwards suddenly, thus throwing the weight 15 upwardly into the cylinder 14 so that when the latch 6 reaches the posi- 2. A door having a latch pivoted at one end with its other end free to move in a vertically disposed plane, a guide on said door, a weight movable in a vertically disposed plane guided by said guide and adapted to contact with said latch, and a stop to limit the upward movement of said weight, said stop being positioned so that said weight can move upwardly after said latch has reached its uppermost position.
JOHN PRENTIOE.
US274995A 1928-05-04 1928-05-04 Door latch Expired - Lifetime US1825283A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US274995A US1825283A (en) 1928-05-04 1928-05-04 Door latch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US274995A US1825283A (en) 1928-05-04 1928-05-04 Door latch

Publications (1)

Publication Number Publication Date
US1825283A true US1825283A (en) 1931-09-29

Family

ID=23050469

Family Applications (1)

Application Number Title Priority Date Filing Date
US274995A Expired - Lifetime US1825283A (en) 1928-05-04 1928-05-04 Door latch

Country Status (1)

Country Link
US (1) US1825283A (en)

Similar Documents

Publication Publication Date Title
US3325203A (en) Sliding door lock
US2197195A (en) Latch
US2166746A (en) Overhead operating garage door construction
US1825283A (en) Door latch
US1896363A (en) Builder's hardware
US1944156A (en) Safety door
US1845458A (en) Lock for sliding closures
US2802711A (en) Cabinet-cover counterbalancing mechanism
US1404053A (en) Canopy door
US2041430A (en) Door stop
US2603842A (en) Tilting door assembly
US1880711A (en) Door holding device
US2781214A (en) Hood latch
US1994208A (en) Hen nest door
ES8702567A1 (en) Door stop.
US2107066A (en) Latch
CN204454201U (en) A kind of safety door automatically can closing self-locking
US1274443A (en) Door.
US2316359A (en) Door fastener
US1530513A (en) Mechanism for operating hoistway doors
US954324A (en) Door-latch.
US1914616A (en) Dry cleaning washer and the like
GB355556A (en) Improvements in stays for hinged articles
US752171A (en) Door-stop
US3702710A (en) Latch for overhead doors