US3150893A - Draw latch - Google Patents

Draw latch Download PDF

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Publication number
US3150893A
US3150893A US23369162A US3150893A US 3150893 A US3150893 A US 3150893A US 23369162 A US23369162 A US 23369162A US 3150893 A US3150893 A US 3150893A
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Prior art keywords
latch
latch plate
drive
drive member
locking
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Expired - Lifetime
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Poe Lloyd Richard
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Hartwell Corp
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Hartwell Corp
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Priority to US23369162 priority Critical patent/US3150893A/en
Priority to GB3790963A priority patent/GB1017560A/en
Application granted granted Critical
Publication of US3150893A publication Critical patent/US3150893A/en
Anticipated expiration legal-status Critical
Assigned to MEES PIERSON N.V., NEW YORK AGENCY reassignment MEES PIERSON N.V., NEW YORK AGENCY ASSIGNMENT OF SECURITY INTEREST IN UNITED STATES TRADEMARKS AND PATENTS Assignors: HARTWELL CORPORATION
Assigned to MEESPIERSON CAPITAL CORP., DELAWARE CORPORATION reassignment MEESPIERSON CAPITAL CORP., DELAWARE CORPORATION ASSIGNMENT OF SECURITY INTEREST IN UNITED STATES TRADEMARKS AND PATENTS Assignors: MEES PIERSON, N.V., NEW YORK AGENCY
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
    • E05C1/00Fastening devices with bolts moving rectilinearly
    • E05C1/02Fastening devices with bolts moving rectilinearly without latching action
    • E05C1/06Fastening devices with bolts moving rectilinearly without latching action with operating handle or equivalent member moving otherwise than rigidly with the bolt
    • EFIXED CONSTRUCTIONS
    • E05LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
    • E05CBOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS OR WINDOWS
    • E05C19/00Other devices specially designed for securing wings, e.g. with suction cups
    • E05C19/10Hook fastenings; Fastenings in which a link engages a fixed hook-like member
    • E05C19/105Butterfly latches
    • 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
    • Y10T292/08Bolts
    • Y10T292/0911Hooked end
    • Y10T292/0913Sliding and swinging
    • Y10T292/0914Operating means
    • Y10T292/0915Cam
    • 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
    • Y10T292/08Bolts
    • Y10T292/0911Hooked end
    • Y10T292/0945Operating means
    • Y10T292/0951Rigid
    • Y10T292/0956Sliding catch

Definitions

  • This invention relates to draw latches, that is to latches, which by turning a handle, move a hook-type latch axially to engage a keeper so that the parts on which the latch and keeper are mounted are drawn together.
  • the locking means being such that the latch may be locked in a multiplicity of positions differing in spacing by only a few thousandths of an inch.
  • FIGURE 1 is a top or planned view of the latch.
  • FIGURE 3 is a partial sectional, partial bottom view of the latch with the keeper omitted, the view being taken through 33 of FIGURE 2
  • FIGURE 4 is a sectional view taken through 4-4 of FIGURE 2, showing particularly the body member and a drive disk.
  • FIGURE 5 is an enlarged, transverse, sectional view taken through 5-5 of FIGURE 2 showing particularly the locking means in its disengaged position, and showing the handle by solid lines in one position and by broken lines in a position at right angles to the solid lined position.
  • FIGURE 6 is an enlarged, transverse, sectional view similar to FIGURE 5, but showing the locking means in its locked position.
  • FIGURE 7 is a fragmentary, exploded, perspective view showing the manner in which the handle is mounted in the drive disk stem.
  • the draw latch includes a base plate 1 having upstanding ears 2 which receive a pivot pin 3.
  • the base plate is adapted to be fastened by one or more screws, not shown, to a door or other member on which it is desired to mount the latch.
  • a body member 4 is provided which may be in the form of a sheet metal stamping having a rolled end 5 adapted to receive the pivot pin 3.
  • a shallow circular housing 6 Formed in the body member 4 is a shallow circular housing 6, its underside forming a shallow recess or cavity.
  • the upper side. of the housing is provided with a large opening, the margins of which are provided with serrations or teeth 7 to form a fixed locking means.
  • the body member At the sides of the body member 4, between the hous ing 6 and the rolled end 5, the body member is provided with a pair of inturned guide lugs 8. A similar pair of guide lugs 9 are provided at the opposite side of the housing.
  • the two pairs of guide lugs serve to support and guide the latch plate 10 underlying the body member 4.
  • guide lugs 9 may be closer spaced than the guide lugs 8, and the corresponding portion of the latch plate which extends forwardly with the body member is reduced in width.
  • the forwardly extending portion of the latch plate terminates in a hooked end II, which is adapted to engage a keeper I2 mounted on the door frame or the other member cooperating with the member on which the base plate I is secured.
  • the portion of the latch plate 10 underlying the housing 6 is provided with a downwardly offset clearance recess 13. Within the recess the latch plate is provided with a perforation 14 which forms a bearing.
  • a latch drive disk 15 Rotatably mounted within the housing 6 is a latch drive disk 15 having a peripheral flange I6 journaling within the circular walls of the housing.
  • the drive disk I5 is provided with a central boss or stem 17 which extends upwardly through the upper side of the housing 6.
  • the underside of the drive disk is provided with a bearing recess 18.
  • a connecting link 19 having upwardly and downwardly extending journal lugs 29 and 21 at its extremities interconnects the bearing recess 18 and bearing perforation I4.
  • the bearing recess 18 is eccentrically located so that on rotation of the drive disk 15, the latch plate It is moved longitudinally.
  • the upper portion of the central boss or stem 17 is preferably square in cross-section and slidably receives a locking disk 22 having a square opening so as to rotate with the drive disk IS.
  • the locking disk 22 is provided with peripheral serrations or teeth 23 adapted to fit within the marginal serrations 7 to lock the drive disk 15 against rotation relative to the housing 6.
  • a spring 24 surrounds the stem 17 and bears against the disk 15 and locking disk 22 to urge the locking disk into locking engagement with the fixed locking means formed by the serrations 7.
  • the extremity of the stem 17 is provided with a recess 25 having a cross-slot 26.
  • a handle member 27 formed of a flat plate is provided with a bifurcand end connected by an integral cross bar 28. The bifurcated end straddles the stem 17 and the cross bar 28 journals within the cross slot 26.
  • a retainer disk 29 closes the recess 25 to retain the cross bar and handle in place, and in turn is held by forcing the portions of the extremities of the stem over the disk by what is commonly termed a staking operation.
  • the bifurcated portion of the handle member projects beyond the cross bar 28 to form a pair or" cam lugs it which, when the handle member is pivoted from a hori zontal position shown in FIGURE 6 to a vertical position shown in FIGURE 5, engages the locking disk 22 to depress the locking disk clear or" the serrations 7.
  • the location of the cross slot 26 in the stem 17 is such that, when the handle is at its folded position shown in FIGURE 6, the underside of the handle is essentially flush with the top side of the housing 5 so that the looking disk is restrained against upper displacement beyond the marginal serrations 7.
  • the lockingdisk 22 When the handle is in its upright position shown in FIGURES l, 2, and 5, the lockingdisk 22 is disengaged from the fixed locking means or serrations 7 and is held out of engagement by the cam lugs 30.
  • the handle when in this position, may be used to turn the drive disk 15 so that the connecting link 19 may move the latch plate 16 longitudinally.
  • the handle When the latch plate has engaged its keeper l2 and drawn the two members to which the base plate 1 and keeper 12 are mounted into mutual engagement, as indicated in FIGURE 2, the handle may be pivoted to its folded position as shown in FIGURE 6 so that the locking disk 22 engages the marginal serrations 7 and locks the drive disk against rotation, thereby locking the latch plate it) against longitudinal displacement.
  • the large number of serrations or teeth '7 and 23 may be provided so that, at virtually any position of the latch plate 1%, the latch plate may be securely locked so as to insure that the members joined by the draw latch are held in tight abutment.
  • a draw latch comprising:
  • a draw latch comprising:
  • locking means including mutually engageable locking elements interposed between said body member and drive member;
  • a draw latch comprising:
  • locking means including fixed and movable locking elements having a multiplicity of intenengaging teeth whereby said locking elements are engageable in a multiplicity of relative positions;
  • a draw latch comprising:
  • locking means including fixed and movable'locking elements having a multiplicity of interengaging teeth whereby said locking elements are engageable in a multiplicity of relative positions;
  • a draw latch comprising:
  • a draw latch comprising:

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Lock And Its Accessories (AREA)
  • Package Frames And Binding Bands (AREA)

Description

Se t. 29, 1964 L. R. POE 3,150,893
DRAW LATCH Filed Oct. 29, 1962 I INVENTOR; 40m lac/r420 R7:
United States Patent Ofiice Patented Sept. 29, 1%64:
3,1593%: DRAW LATGH Lloyd Richard Poe, Les Angeies, Caiifi, assignor to Hartwell Corporation, Los Angeies, Calih, a corporation of California Filed Oct. 29, 1962, Ser. No. 233,691 6 Claims. (Cl. 292-111) This invention relates to draw latches, that is to latches, which by turning a handle, move a hook-type latch axially to engage a keeper so that the parts on which the latch and keeper are mounted are drawn together.
Included in the objects of this invention are:
First, to provide a draw latch which incorporates a novel locking means, whereby the latch may be readily locked to the keeper, when the parts on which the keeper and latch are mounted, are drawn together.
Second, to provide a draw latch of this type which does not require close tolerances in the spacing between the latch and keeper and between the member on which they are mounted, the locking means being such that the latch may be locked in a multiplicity of positions differing in spacing by only a few thousandths of an inch.
Third, to provide a draw latch which incorporates a novel locking means normally maintained in a locked position by a spring, and adapted to be released by a cam means, carried by a handle, employed to operate the latch.
With the above and other objects in view as may appear hereinafter, reference is directed to the accompanying drawings in which:
FIGURE 1 is a top or planned view of the latch.
FIGURE 2 is a side view thereof indicating in section and fragmentarily a door and frame on which a latch is mounted.
FIGURE 3 is a partial sectional, partial bottom view of the latch with the keeper omitted, the view being taken through 33 of FIGURE 2 FIGURE 4 is a sectional view taken through 4-4 of FIGURE 2, showing particularly the body member and a drive disk.
FIGURE 5 is an enlarged, transverse, sectional view taken through 5-5 of FIGURE 2 showing particularly the locking means in its disengaged position, and showing the handle by solid lines in one position and by broken lines in a position at right angles to the solid lined position.
FIGURE 6 is an enlarged, transverse, sectional view similar to FIGURE 5, but showing the locking means in its locked position.
FIGURE 7 is a fragmentary, exploded, perspective view showing the manner in which the handle is mounted in the drive disk stem.
The draw latch includes a base plate 1 having upstanding ears 2 which receive a pivot pin 3. The base plate is adapted to be fastened by one or more screws, not shown, to a door or other member on which it is desired to mount the latch. A body member 4 is provided which may be in the form of a sheet metal stamping having a rolled end 5 adapted to receive the pivot pin 3.
Formed in the body member 4 is a shallow circular housing 6, its underside forming a shallow recess or cavity. The upper side. of the housing is provided with a large opening, the margins of which are provided with serrations or teeth 7 to form a fixed locking means.
At the sides of the body member 4, between the hous ing 6 and the rolled end 5, the body member is provided with a pair of inturned guide lugs 8. A similar pair of guide lugs 9 are provided at the opposite side of the housing.
The two pairs of guide lugs serve to support and guide the latch plate 10 underlying the body member 4. The
guide lugs 9 may be closer spaced than the guide lugs 8, and the corresponding portion of the latch plate which extends forwardly with the body member is reduced in width.
The forwardly extending portion of the latch plate terminates in a hooked end II, which is adapted to engage a keeper I2 mounted on the door frame or the other member cooperating with the member on which the base plate I is secured.
The portion of the latch plate 10 underlying the housing 6 is provided with a downwardly offset clearance recess 13. Within the recess the latch plate is provided with a perforation 14 which forms a bearing.
Rotatably mounted Within the housing 6 is a latch drive disk 15 having a peripheral flange I6 journaling within the circular walls of the housing. The drive disk I5 is provided with a central boss or stem 17 which extends upwardly through the upper side of the housing 6.
The underside of the drive disk is provided with a bearing recess 18. A connecting link 19 having upwardly and downwardly extending journal lugs 29 and 21 at its extremities interconnects the bearing recess 18 and bearing perforation I4. The bearing recess 18 is eccentrically located so that on rotation of the drive disk 15, the latch plate It is moved longitudinally.
The upper portion of the central boss or stem 17 is preferably square in cross-section and slidably receives a locking disk 22 having a square opening so as to rotate with the drive disk IS. The locking disk 22 is provided with peripheral serrations or teeth 23 adapted to fit within the marginal serrations 7 to lock the drive disk 15 against rotation relative to the housing 6.
A spring 24 surrounds the stem 17 and bears against the disk 15 and locking disk 22 to urge the locking disk into locking engagement with the fixed locking means formed by the serrations 7.
The extremity of the stem 17 is provided with a recess 25 having a cross-slot 26. A handle member 27 formed of a flat plate is provided with a bifurcand end connected by an integral cross bar 28. The bifurcated end straddles the stem 17 and the cross bar 28 journals within the cross slot 26. A retainer disk 29 closes the recess 25 to retain the cross bar and handle in place, and in turn is held by forcing the portions of the extremities of the stem over the disk by what is commonly termed a staking operation.
The bifurcated portion of the handle member projects beyond the cross bar 28 to form a pair or" cam lugs it which, when the handle member is pivoted from a hori zontal position shown in FIGURE 6 to a vertical position shown in FIGURE 5, engages the locking disk 22 to depress the locking disk clear or" the serrations 7.
The location of the cross slot 26 in the stem 17 is such that, when the handle is at its folded position shown in FIGURE 6, the underside of the handle is essentially flush with the top side of the housing 5 so that the looking disk is restrained against upper displacement beyond the marginal serrations 7.
Operation of the draw latch is as follows:
When the handle is in its upright position shown in FIGURES l, 2, and 5, the lockingdisk 22 is disengaged from the fixed locking means or serrations 7 and is held out of engagement by the cam lugs 30. The handle, when in this position, may be used to turn the drive disk 15 so that the connecting link 19 may move the latch plate 16 longitudinally.
When the latch plate has engaged its keeper l2 and drawn the two members to which the base plate 1 and keeper 12 are mounted into mutual engagement, as indicated in FIGURE 2, the handle may be pivoted to its folded position as shown in FIGURE 6 so that the locking disk 22 engages the marginal serrations 7 and locks the drive disk against rotation, thereby locking the latch plate it) against longitudinal displacement.
it will be observed that the large number of serrations or teeth '7 and 23 may be provided so that, at virtually any position of the latch plate 1%, the latch plate may be securely locked so as to insure that the members joined by the draw latch are held in tight abutment.
While a particular embodiment of this invention has been shown and described, it is not intended to limit the same to the exact details of the construction set forth and it embraces such changes, modifications, and equivalents of the parts and their formation and arrangement as come within the purview of the appended claims.
What is claimed is:
l. A draw latch comprising:
(a) alatch plate;
(1:) a body member slidably receiving said latch plate;
() a rotatable drive member journalled in said body member;
(d) a drive linkage operatively connecting said drive member and latch plate to eilect longitudinal movement of said latch plate on rotation of said drive member;
(6) interengageable locking means interposed between said body member and drive member for securing said drive member and said latch plate against movement;
(f) and a handle connected with said drive member and including an element for disengaging said locking means to free said drive member for operation of said latch plate.
2. A draw latch comprising:
(a) alatch plate;
([2) a body member slidably receiving said latch plate;
(0) a rotatable drive member journalled in said body member;
(d) a drive linkage operatively connecting said drive member and latch plate to eifect longitudinal movement of said latch plate on rotation of said drive member;
(e) locking means including mutually engageable locking elements interposed between said body member and drive member;
(3) a spring urging said locking elements into mutual engagement thereby to secure said drive member and latch plate against movement;
(g) and a handle pivotally connected to said drive member about an axis transverse to the axis of rotation of the drive member and including cam means engageable with said clutch to effect disengagement thereby to free said drive member and latch plate for movement.
3. A draw latch comprising:
(a) alatch plate;
(b) a body member slidably receiving said latch plate;
(0) a rotatable drive member journalled in said body member;
(d) a drive linkage operatively connecting said drive member and latch plate to eifect longitudinalmovement of said latch plate on rotation of said drive member;
(e) locking means including fixed and movable locking elements having a multiplicity of intenengaging teeth whereby said locking elements are engageable in a multiplicity of relative positions;
(f) and a handle connected with said drive member and including an element for disengaging said locking means to free said drive member for operation of said latch plate.
4. A draw latch comprising:
(a) alatchplate;
(b) a body member slidably receiving said latch plate;
(c) a rotatable drive member journalled in said body member;
(d) a drive linkage operatively connecting said drive member and latch plate to effect longitudinal movement of said latch plate on rotation of said drive member;
(:2) locking means including fixed and movable'locking elements having a multiplicity of interengaging teeth whereby said locking elements are engageable in a multiplicity of relative positions;
(f) a spring urging said locking elements into mutual engagement thereby to secure said drive member and latch plate against movement;
(11) and a handle pivotally connected to said drive member about an axis transverse to the axis of rotation of the drive member and including cam means engageable with said clutch toetfect disengagement thereby to free said drive member and latch plate for movement.
5. A draw latch comprising:
(a) alatch plate;
(b) a body member overlying and slidably receiving said latch plate, said body member having a circular recessed portion confronting said latch plate, and an annular fixed locking element concentric with said recessed portion;
(c) a latch drive disk journalled in said recess and having a central stern extending upwardly through said fixed locking element;
((1) a drive means interconnecting said drive disk and latch plate to effect longitudinal movement of said latch plate on rotation of said drive disk;
(e) a circular movable locking element rotatable with said drive disk and slidable on said stem for engagement with said fixed locking element;
(f) a handle connected to said stem for rotating said drive disk, said handle including a cam for disengaging said locking elements;
(g) and yieldable means urging said locking elements into engagement.
6. A draw latch comprising:
(a) a latch plate;
(b) a body member overlying and slidably receiving said latch plate, said body member having a circular recessed portion confronting said latch plate and an aperture concentric with said recessed portion, the aperture being bordered by a ring of fixed locking teeth;
(0) a latch drive disk journalled in said recess and having a central stem extending upwardly through said aperture;
(d) a drive means interconnecting said drive disk and latch plate to effect longitudinal movement of said latch plate on rotation of said drive disk;
(e) a locking disk rotatable with said drive disk and slidable on said stem, said locking disk having peripheral locking teeth;
(f) a spring urging said locking teeth into interengagement for locking said drive disk and latch plate in any of a multiplicity of positions;
g) and a handle pivotally connected to said stern and including a cam means for urging said locking disk to disengage said locking teeth, thereby to permit movement of said drive disk and latch plate.
References Cited in the file of this patent UNITED STATES PATENTS 2,820,995 Schlueter Jan. 28, 1958 2,853,751 Schlueter Sept. 30, 1958 2,853,752 Schlueter Sept. 30, 1958

Claims (1)

1. A DRAW LATCH COMPRISING: (A) A LATCH PLATE; (B) A BODY MEMBER SLIDABLY RECEIVING SAID LATCH PLATE; (C) A ROTATABLE DRIVE MEMBER JOUARNALLED IN SAID BODY MEMBER; (D) A DRIVE LINKAGE OPERATIVELY CONNECTING SAID DRIVE MEMBER AND LATCH PLATE TO EFFECT LONGITUDINAL MOVEMENT OF SAID LATCH PLATE ON ROTATION OF SAID DRIVE MEMBER; (E) INTERENGAGEABLE LOCKING MEANS INTERPOSED BETWEEN SAID BODY MEMBER AND DRIVE MEMBER FOR SECURING SAID DRIVE MEMBER AND SAID LATCH PLATE AGAINST MOVEMENT; (F) AND A HANDLE CONNECTED WITH SAID DRIVE MEMBER AND INCLUDING AN ELEMENT FOR DISENGAGING SAID LOCKING MEANS TO FREE SAID DRIVE MEMBER FOR OPERATION OF SAID LATCH PLATE.
US23369162 1962-10-29 1962-10-29 Draw latch Expired - Lifetime US3150893A (en)

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Application Number Priority Date Filing Date Title
US23369162 US3150893A (en) 1962-10-29 1962-10-29 Draw latch
GB3790963A GB1017560A (en) 1962-10-29 1963-09-26 Draw bolt

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5669638A (en) * 1996-02-01 1997-09-23 Southco, Inc. Fastening device
US6050616A (en) * 1996-09-26 2000-04-18 Protex Fasteners Limited Case catches
US20140042755A1 (en) * 2012-07-03 2014-02-13 Penn Elcom Ltd. Case latch assembly

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2820995A (en) * 1955-10-04 1958-01-28 Schlueter Ernest Spring loaded link lock fastener
US2853751A (en) * 1952-02-05 1958-09-30 Simmons Fastener Corp Link lock fastener
US2853752A (en) * 1952-12-17 1958-09-30 Simmons Fastener Corp Positively locked link lock fastener

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2853751A (en) * 1952-02-05 1958-09-30 Simmons Fastener Corp Link lock fastener
US2853752A (en) * 1952-12-17 1958-09-30 Simmons Fastener Corp Positively locked link lock fastener
US2820995A (en) * 1955-10-04 1958-01-28 Schlueter Ernest Spring loaded link lock fastener

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5669638A (en) * 1996-02-01 1997-09-23 Southco, Inc. Fastening device
US6050616A (en) * 1996-09-26 2000-04-18 Protex Fasteners Limited Case catches
US20140042755A1 (en) * 2012-07-03 2014-02-13 Penn Elcom Ltd. Case latch assembly

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Publication number Publication date
GB1017560A (en) 1966-01-19

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Owner name: MEES PIERSON N.V., NEW YORK AGENCY, NEW YORK

Free format text: ASSIGNMENT OF SECURITY INTEREST IN UNITED STATES TRADEMARKS AND PATENTS;ASSIGNOR:HARTWELL CORPORATION;REEL/FRAME:008430/0578

Effective date: 19970324

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Owner name: MEESPIERSON CAPITAL CORP., DELAWARE CORPORATION, N

Free format text: ASSIGNMENT OF SECURITY INTEREST IN UNITED STATES TRADEMARKS AND PATENTS;ASSIGNOR:MEES PIERSON, N.V., NEW YORK AGENCY;REEL/FRAME:008744/0973

Effective date: 19971120