US3896645A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Double spin knob door lock
Assignee: Individual
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Filing: 1974-10-11
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Granted: 1975-07-29
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Expires: 1994-10-11
Abstract
Abstract This double spin knob door lock is formed of inside and outside spin knob assemblies which are both conditioned automatically for spin by the removal of the key. A blunt ended lock bolt is biased to an extended position from the door edge into a door frame keeper. In order to render the knob effective to retract the lock bolt, the key must be inserted and turned relative to and with the knob in a clockwise direction through 90*. Each of the knob assemblies have a tumbler lock cylinder with a shaft that is connected to a fast threaded work block that with the turn of a key is thrust forwardly to work an externally-splined nut into an internally-splined ring, that with the opposing ring of the other assembly, is joined in common with a crank pin that passes through a slot in the laterally extending lock bolt assembly so as to retract the same and unlock the door. The key can be kept in the inside knob when the occupant of the premises is home. A stiff-spring latch is provided upon the inside hand knob that enters a notch in the key to keep the key in the knob against easy removal. A resilient bumper is provided on the inner face of the door frame against which the blunt ended bolt will bump if an attempt is made to close the door with the bolt projected. The lock assemblies are so made that with removal of a stop on the front face of the lock cylinder the key can be used by turning in a counter clockwise direction to release the knob from its assembly so that the lock cylinders and key can be changed.
Inventors
- 👤 Charles E Nagy
- 👤 John F Nagy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 23:32
CPC Classifications
E; E05; E05B; E05B63/00; E05B63/0017; Y; Y10; Y10S; Y10S70/00; Y10S70/60; Y10T; Y10T292/00; Y10T292/08; Y10T292/096; Y10T292/0969; Y10T292/097; Y10T292/0977; Y10T292/85; Y10T70/00; Y10T70/50; Y10T70/5093; Y10T70/5155; Y10T70/5199; Y10T70/5372; Y10T70/5385; Y10T70/5389; Y10T70/5496; Y10T70/5611; Y10T70/5757; Y10T70/5765; Y10T70/5805; Y10T70/5819; Y10T70/5823; Y10T70/5827
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
323 words
A double spin hand knob door lock comprising two axiallyopposing hand knob assemblies, a casing assembly for joining the hand knob assemblies together and adapted to be inserted therewith as a unit into a cutout lock opening in the door adjacent the edge thereof, said casing having and opening adjacent the door edge, one of said hand knob assemblies extending from the inner side of the door and the other hand knob assembly extending from the outer side of the door, each of said hand knob assemblies including a body part journaled in the casing assembly and a hand knob extending outwardly from the body part to turn the same, a tumbler lock cylinder fixed within the hand knob and having a drive shaft extending inwardly therefrom, an operating block journaled in the body part and having a fastthreaded projection thereon, an externally-splined nut journaled in the body part and threadedly connected to the fast threaded block projection to be positively thrust inwardly when the lock cylinder and its shaft are turned by the key, an internallysplined ring journaled in the casing assembly and receiving the externally-splined nut when thrust thereinto by the turning of the fast threaded block, a lock bolt assembly laterallyadjustable through the opening in the casing assembly and the door edge between retracted and extended lock positions with respect to the door edge, a crank pin extending between the internally-splined rings of the both assemblies and operatively connected to the lock bolt assembly to positively retract and extend the same, and means for securing the casing assembly in the cutout lock opening of the door, the hand knob of each of the hand knob assmblies, uPon the externally-splined fast thread nut being retracted from its cooperating ring by the lock cylinder and its shaft, being free to spin thereby effectively locking the door from the inner and outer sides thereof, the inner side as well as the outer side.
Claim 2
Dependent Claim
323 words
A double spin hand knob door lock comprising two axiallyopposing hand knob assemblies, a casing assembly for joining the hand knob assemblies together and adapted to be inserted therewith as a unit into a cutout lock opening in the door adjacent the edge thereof, said casing having and opening adjacent the door edge, one of said hand knob assemblies extending from the inner side of the door and the other hand knob assembly extending from the outer side of the door, each of said hand knob assemblies including a body part journaled in the casing assembly and a hand knob extending outwardly from the body part to turn the same, a tumbler lock cylinder fixed within the hand knob and having a drive shaft extending inwardly therefrom, an operating block journaled in the body part and having a fastthreaded projection thereon, an externally-splined nut journaled in the body part and threadedly connected to the fast threaded block projection to be positively thrust inwardly when the lock cylinder and its shaft are turned by the key, an internallysplined ring journaled in the casing assembly and receiving the externally-splined nut when thrust thereinto by the turning of the fast threaded block, a lock bolt assembly laterallyadjustable through the opening in the casing assembly and the door edge between retracted and extended lock positions with respect to the door edge, a crank pin extending between the internally-splined rings of the both assemblies and operatively connected to the lock bolt assembly to positively retract and extend the same, and means for securing the casing assembly in the cutout lock opening of the door, the hand knob of each of the hand knob assmblies, uPon the externally-splined fast thread nut being retracted from its cooperating ring by the lock cylinder and its shaft, being free to spin thereby effectively locking the door from the inner and outer sides thereof, the inner side as well as the outer side.
Claim 3
Dependent Claim
77 words
A double spin hand knob door lock as defined in claim 1, biasing spring means reacting between the door and the lock bolt assembly for normally maintaining the lock bolt assembly in its extended position in engagement with a door frame keeper, the connection of said crank pin with the laterally-extending lock bolt assembly including a vertically-extending slot on its inner end and said crank pin extending through said lock bolt slot and into the internally-splined rings.
Claim 4
Dependent Claim
48 words
A double spin hand knob door lock as defined in claim 2, and said laterally-extending lock bolt assembly having an longitudinally extending slot intermediately forwardly of its vertically-extending slot, a long steadying pin extending between the casing unit parts and the longitudinally-extending slot in the lock bolt assembly.
Claim 5
Dependent Claim
104 words
A double spin hand knob door lock as defined in claim 2 and said laterally-extending lock bolt assembly having a rearwardly-extending rod extension to limit the retraction movement of the lock bolt assembly, a compression spring surrounding the rod, a guide sleeve container therefor secured to the rear end of the casing unit and extending forwardly therefrom to receive the rod extension of the lock bolt assembly and an adjustable stop threaded into the rear end of the guide sleeve container and is to limit the retraction movement of the lock bolt assembly and to adjust the compression of the rod extension spring thereof.
Claim 6
Dependent Claim
75 words
A double spin hand knob door lock as defined in claim 1 and said casing assembly comprising two splined ring support members in which the internally splined rings are respectively journaled with said crank pin interconnecting the same, said ring support members having inwardly-extending flanges respectively overlying one another, outer casing members having inwardly-extending flanges opposing one another and means securing together the inwardly-extending flanges of the ring support members and the outer casing members.
Claim 7
Dependent Claim
84 words
A double spin hand knob door lock as defined in claim 5, and said outer casing members respectively having externally-threaded outwardly-extending central sleeve projections, said means for securing the casing assembly to the lock opening in the door including attaching plates having central internally-threaded projections threaded upon the externally-threaded projection of the outer casing members and brought into tight flush engagement with the side faces of the door and screw fastening means extending through the door and between the peripheries of the attaching plates.
Claim 8
Dependent Claim
101 words
A double spin hand knob door lock as defined in claim 6, and each of said body parts having outwardly-extending sleeve projections and the hand knob having a sleeve projection overlying the sleeve projection of the body part, said attaching plates being beveled on their outer periphery and cover plates extending over the knob sleeve projection and snapped fitted at their outer peripheries for engagement with the beveled peripheries of the screw retained attaching plates and annular rib formations on the knob sleeve projections to hold the cover plates in tight engagement with attaching plates and to prevent their detactment therefrom.
Claim 9
Dependent Claim
184 words
A double spin hand knob door lock as defined in claim 1, and at least one of the hand knob assemblies having its body part provided with an outwardly-extending sleeve projection and having diametrically-opposite inwardly-struck prongs therealong, said hand knob having an inwardly-extending sleeve projection telescopically-fitted over the body part sleeve projection, a round notched lock member for the hand knob fixed to the tumbler lock cylinder drive shaft in rear of the inwardly struck prongs and having notches on the surface thereof and angular-spaced from one another to accommodate respectively the respective prongs and to permit by the turning of the key in the lock cylinder and the drive shaft in a counter clockwise direction the axially removal of the hand knob and its sleeve projection from the hand knob assembly, and removable stop means provided upon the lock cylinder normally to prevent the counter clockwise turning of the key and the removal of the hand knob from its assembly, whereby the hand knob can be replaced with another tumbler lock cylinder and key, or the disassembly of the lock from the door.
Claim 10
Dependent Claim
133 words
A double spin hand knob door lock as defined in claim 1 and said tumbler lock cylinder on the inside knob assembly having an inner turnable part with a key slot, said key adapted to fit the key slot to align the tumblers thereof to permit the turning of the lock cylinder shaft and to effect the engagement of the knob assembly with the lock bolt assembly so as to retract the same, a depressible spring latch bar for preventing the easy extraction of the key from its lock slot and means anchoring the bar to the front face of the inner turnable lock part to extend laterally thereacross and below the underedge to receive the spring latch bar, whereby the key may be retained in its slot until needed by the occupant.
Claim 11
Dependent Claim
96 words
A double spin hand knob door lock as defined in claim 1 and a door frame for housing the door, said lock bolt being live and having a blunted end normally biased to its extended position beyond the door edge, a bolt keeper in the jamb of the door frame for receiving the lock bolt blunted end, and a bumper plate formed of resilient material secured to the door frame at the elevation of the bolt keeper against which the blunted lock bolt end may strike when attempting to close the door with the bolt projected.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-07-28 | 1979-01-27 | 1979-07-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-07-28 | 1983-01-27 | 1983-07-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-07-28 | 1987-01-27 | 1987-07-29 | $7700.00 | Window Closed / Lapsed |