Locks – Special application – For control and machine elements
Patent
1988-05-25
1990-06-05
Smith, Gary L.
Locks
Special application
For control and machine elements
70215, 292 39, 292337, 292DIG68, E05B 1310
Patent
active
049303252
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The invention relates to a swivel or pivot lever bar closure in the fillet gap of sheet metal cabinet doors.
A pivot lever bar closure of this nature is already known from the German patent application DE 34 07 700 A 1.
The advantage of this closure lies in that it occupies relatively little space and is so small that it can even be placed without difficulty in the narrow fillet gap of sheet metal cabinet doors. The advantage of placing it in the fillet gap is that otherwise dead space can be used and also that the inner clear space of a switch cabinet is fully available for other structural parts, in particular, switch devices. Since the fillet gap is outside the region of the switch cabinets that need to be sealed, sealing measures involving the closure itself can usually be dispensed with.
However, the known closure still had disadvantages. Apart from the two rectangular apertures of identical size, round apertures are required, through which the fastening screws can be led. This increases the expense of manufacturing the door panel, complicates installation of the closure and increases the overall length by the area holding the fastening screws. In addition, the arrangement of the cylinder lock within the base plate increases the overall length still further.
By arranging denticulations at both of the narrow sides of the side bars it is possible to use the closure for left as well as also for opening switch cabinet doors. However, when using preassembled locks, these bars cannot be simply changed. Instead, the pinion must be disassembled in a very cumbersome process from the lock case, the bars must be taken out, changed in the desired way, reinstalled, and then the pinion must again be installed. This problem occurs when a continuous slide bar is changed, because the bar cannot be slid into the guide channel of a preassembled lock case. If the locking devices arranged on the bar are formed by cuts into the bar, as in the known bar closure (see European patent application 85 111 937.0, published under the number 0176890), it becomes difficult to use the bars left as well as also right, because the bilateral cuts which would be required in the flat material bar could weaken the bars too much.
SUMMARY OF THE INVENTION
It is an object of the invention to improve the known pivot lever closure by decreasing the overall length so that no additional bores are required for fastening it in the door panel apart from the two rectangular apertures. Moreover, the construction should be such that the bar closure is applicable for left as well as for right-closing switch cabinet doors, with subsequent changes possible without tedious disassembling operations of the pinion, and without too much weakening of the bars which have flat strip material.
The drive of the flat bars should take place axially as much as possible in order to preclude undesirable tilting in the bar guides which would increase friction. Furthermore, the bar closure should consist of as few parts as possible, should run as smoothly as possible, and should permit ease of closure even if the locking devices must have a large run-up slope due to sealing devices provided between the door frame and the door panel.
This problem is solved in that the one shoulder is part of the lock case and that this shoulder, together with another part of the lock case, clamps the door panel in the region of the first rectangular aperture centering it. The other shoulder forms a hold for the cylinder lock arranged toward the end of the pivot lever. This other shoulder, together with a holding part which extends from it integrally in one piece or can be fastened to it by screws, clamps the door panel in the region of the second rectangular aperture centering it.
The pivot lever closure within the two rectangular openings is achieved without fastening means requiring additional apertures. In addition, the overall length is decreased and the manufacture of the door panel is simplified, since such additional apertures are not needed. Moreover
REFERENCES:
patent: 1729038 (1929-09-01), French
patent: 1883119 (1932-10-01), Toncray
patent: 2500849 (1950-03-01), Menns
patent: 2825219 (1958-03-01), Marziller
patent: 2835523 (1958-05-01), Chervenka
patent: 3095727 (1963-07-01), Kerr
patent: 3158016 (1964-11-01), Fay
patent: 3478919 (1969-11-01), Turpen
patent: 4616864 (1986-10-01), Douglas
patent: 4648636 (1987-03-01), Reynard
patent: 4754624 (1988-07-01), Fleming et al.
Dino Suzanne L.
Smith Gary L.
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