US3608939A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible latch set
Assignee: VELTO INDUSTRIES Ltd
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Filing: 1969-09-17
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Granted: 1971-09-28
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Expires: 1989-09-17
Abstract
Abstract A latch set having a locking slide which is movable from a disengaged position, in which a latch mechanism can be actuated by rotation of either door handle, to an engaged position, in which the latch set and therefore the door are locked. The locking slide is adjustable relative to associated parts whereby the latch set can selectively be installed as either a privacy set which will lock the door, or as a passage set which will merely latch but not lock the door, with either one of the alternate installations being adapted for later conversion to the other.
Inventors
- 👤 Stuart G Mcburnie
- 👤 William G Fortt
- 👤 Michel L E Rocher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 20:12
CPC Classifications
E; E05; E05B; E05B63/00; E05B63/24; E05B63/248; E05C; E05C1/00; E05C1/08; E05C1/12; E05C1/16; E05C1/163; Y; Y10; Y10T; Y10T292/00; Y10T292/175; Y10T292/18; Y10T292/68; Y10T292/705; Y10T292/96
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
283 words
A convertible latch set comprising a housing mountable to extend through a large hole formed in a door, said housing having end plates nonrotatably engaging opposite faces of the door, a shaft extending longitudinally through the housing and through openings in the end plates, a first handle knob secured to one end of the shaft and being rotatably supported by an adjoining end plate, a locking slide nonrotatably mounted on an opposite end of the shaft, a second handle knob nonrotatably mounted on the locking slide and being rotatably supported by an adjoining end plate, said locking slide being movable by the second handle knob fRom an inner locked position to an outer unlocked position, a pressure pin mounted for endwise movement in a relatively small hole extending into the door edge normal to and connecting with the large hole, drive means between the pressure pin and the shaft, a latching mechanism mountable in an edge of the door and in a door jamb normally engaged to retain the door in closed position, said shaft being rotatable by the handle knobs when the locking slide is in the outer unlocked position to move the pressure pin to engage and release the latching mechanism, stop means between the housing and the locking slide engaged when said locking slide is in the inner locked position to prevent rotation of the shaft, said stop means comprising a key carried by the housing, said locking slide having a keyway to receive the key when the locking slide is moved to the inner locked position, and including circumferentially spaced ribs on said shaft, said key projecting between the ribs and cooperating therewith to limit rotation of said shaft.
Claim 2
Dependent Claim
283 words
A convertible latch set comprising a housing mountable to extend through a large hole formed in a door, said housing having end plates nonrotatably engaging opposite faces of the door, a shaft extending longitudinally through the housing and through openings in the end plates, a first handle knob secured to one end of the shaft and being rotatably supported by an adjoining end plate, a locking slide nonrotatably mounted on an opposite end of the shaft, a second handle knob nonrotatably mounted on the locking slide and being rotatably supported by an adjoining end plate, said locking slide being movable by the second handle knob fRom an inner locked position to an outer unlocked position, a pressure pin mounted for endwise movement in a relatively small hole extending into the door edge normal to and connecting with the large hole, drive means between the pressure pin and the shaft, a latching mechanism mountable in an edge of the door and in a door jamb normally engaged to retain the door in closed position, said shaft being rotatable by the handle knobs when the locking slide is in the outer unlocked position to move the pressure pin to engage and release the latching mechanism, stop means between the housing and the locking slide engaged when said locking slide is in the inner locked position to prevent rotation of the shaft, said stop means comprising a key carried by the housing, said locking slide having a keyway to receive the key when the locking slide is moved to the inner locked position, and including circumferentially spaced ribs on said shaft, said key projecting between the ribs and cooperating therewith to limit rotation of said shaft.
Claim 3
Dependent Claim
143 words
A convertible latch set as claimed in claim 1, in which said latching mechanism comprises a stop on the edge of the door, a keeper mounted in the doorjamb opposite the pressure pin for swinging movement about a vertical axis, spring means biasing the keeper to an outwardly inclined position whereby a free edge of said keeper will engage the stop when the door is closed, and adjustable means for moving the keeper towards and away from the stop and securing said keeper in a selected position relative to said stop, said adjustable means comprising a frame secured to the doorjamb, a keeper plate mounted in the frame for limited horizontal movement, said keeper being mounted as aforesaid within the keeper plate, an adjusting bolt journaled by the frame, said keeper plate having a threaded part in operative engagement with the adjusting bolt.
Claim 4
Dependent Claim
34 words
A convertible latch set as claimed in claim 1, and including gripping means frictionally securing the locking slide to the ribs and resisting endwise movement of said locking slide to disengage the stop means.
Claim 5
Dependent Claim
30 words
A convertible latch set as claimed in claim 3, in which said gripping means comprises circumferentially spaced lugs mounted on the locking slide to engage the ribs on the shaft.
Claim 6
Dependent Claim
64 words
A convertible latch set as claimed in claim 3, and including a release pin carried by said one end of the shaft for endwise movement thereon, said first handle knob being hollow and having an outer end cover provided with an aperture, said release pin being adapted to be moved endwise to disengage the stop means by a needlelike tool entered through the aperture.
Claim 7
Dependent Claim
61 words
A convertible latch set as claimed in claim 5, in which said release pin has a disc at one end thereof, said one end of the shaft having a longitudinal channel extending along the periphery thereof, said release pin being slidably mounted in the channel with the disc extending across the end of the shaft for engagement by the needlelike tool.
Claim 8
Dependent Claim
22 words
A convertible latch set as claimed in claim 1, and including spring means biasing the pressure pin away from the latch mechanism.
Claim 9
Dependent Claim
41 words
A convertible latch set as claimed in claim 7, in which said pressure pin has an inner part and an outer part, said inner and outer parts being threadedly connected together to permit the pressure pin to be varied in length.
Claim 10
Dependent Claim
52 words
A convertible latch set as claimed in claim 1, and including locking means securing the second handle knob to the locking slide, said locking means being adjustable to allow the second handle knob to be selectively positioned on the locking slide whereby to retain said locking slide in the outer unlocked position.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-27 | 1975-03-29 | 1975-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-27 | 1979-03-29 | 1979-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-27 | 1983-03-29 | 1983-09-28 | $7700.00 | Window Closed / Lapsed |