Cylindrical lock set

Details Cylindrical lock set Cylindrical lock set

1974-11-14

1976-05-11

Craig, Jr., Albert G.

Locks

Special application

For control and machine elements

70370, 70451, 70461, 70462, 2923363, 292347, 292352, E05B 6310

Patent

active

039553876

ABSTRACT:
A heavy duty cylindrical lock set adaptable for various "functions" and having improved features, especially to permit a key-removable lock core to be reversible in its knob mounting to suit right- and left-hand doors. A knob sleeve of large diameter is slotted and shaped at its knob receiving end to form two diametrically-opposed channel sections of high strength and rigidity. The inward edges of the four channel side legs form a mounting seat to receive the key-plug-containing body of the core on the axis of the knob, while the two spaces between the channel sections permit the pin-tumbler lobe or section of the core to extend radially in either of two orientations about the axis of the knob. Two of the channel side edges are notched to engage a key-controlled retaining lug of the core. The knob has a large bore in its outer end and is supported from the knob sleeve by a drive ring which accomodates the core in both orientations. A face plate is held in the knob bore by the core and closes the knob bore. The same knob may be used on the inside of the door, with a similar lock core and face plate or with a different face plate, differently retained, according to the "function" for which the lock set is adapted. The locked knob is retained on the sleeve by a keeper engaged behind a heavy internal rib and blocked from retraction by the cylindrical shank of a throw member held in place by the key-removable core.
The inner end of the core-containing knob sleeve has a roll-back cam operable in one direction and contains a key release cam assembly having a roll-back cam operable in the other direction either by a key-actuated throw member or by the knob sleeve. The knob sleeve is of heavy section and is held against forceful withdrawal from the frame assembly both by the roll-back cam and by a spaced out-turned lug which rides in a groove in the hub below the level of the key-release roll-back cam.
The knob has an integral tubular neck which rotatably fits over the mounting hub of the chassis and which is neatly surrounded over a variable length by a collar on an axially adjustable escutcheon. The escutcheon is threaded on the hub and is locked in adjusted position by a plunger pin which latches in retracted position during escutcheon adjustment.

REFERENCES:
patent: 1938112 (1933-12-01), Schlage
patent: 2301751 (1942-11-01), Schlage
patent: 2719424 (1955-10-01), Rayburn
patent: 2848264 (1958-08-01), Lynch
patent: 2998274 (1961-08-01), Russell
patent: 3077100 (1963-02-01), Gerlach
patent: 3190091 (1965-06-01), Russell et al.
patent: 3413829 (1968-12-01), Russell

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