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Publication numberUS1229851 A
Publication typeGrant
Publication dateJun 12, 1917
Filing dateFeb 4, 1916
Priority dateFeb 4, 1916
Publication numberUS 1229851 A, US 1229851A, US-A-1229851, US1229851 A, US1229851A
InventorsLewis R Abercrombie
Original AssigneeLewis R Abercrombie
Export CitationBiBTeX, EndNote, RefMan
External Links: USPTO, USPTO Assignment, Espacenet
Silo-door lock.
US 1229851 A
Abstract  available in
Previous page
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Claims  available in
Description  (OCR text may contain errors)




Patented June 12, 1917.

W m y r mm m N .7 W m 6. L Q

m w W m: NoRms P512115 :0. FNOm-IJ'INQ. msmriryou. liftunrrnn erarns Parana clarion LEWIS R. ABERGROMBIE, OF PORTLAND, OREGON.


To all whom it may concern:

Be it known that I, LEWIS R. ABEnoRoM- BIE, a citizen of the United States, and a resident of the city of Portland, county of Multnomah, State of Oregon, have invented a new and useful Improvement in Silo-Door Locks, of which the following is a specification.

This invention relates generally to silos and has particularly to do with looking devices by means of which the silo doors are forced into an air-tight fit against the sides of the door openings, and securely located in such position.

My invention particularly relates to silos built of wood, and in this connection has for its particular object the providing of a doorlocking means having a comparatively wide range of adjustment, so as to adjust the action thereof to the discrepancies due to the shrinking and swelling of the wood.

In the accompanying drawings:

Figure 1 is a fragmental front elevation of a silo showing the door clamped and locked in position over the door opening by means of my device; the operating levers are omitted from the left side of this figure;

Fig. 2 is a larger-scaled sectional detail taken approximately on the line 22 of Fig. 1; and

Fig. 3 is a horizontal sectional view on the line 33 of Fig. 2. In this view the operating lever is omitted, and the broken lines indicate different positions assumed by certain movable parts during the operation of the device.

1 In the drawings, the silo illustrated is of the well known wooden stave type, although my invention could be applied to other types of silo with equal success. a

a represents the vertical staves of the silo body, adjacent the continuous door opening 5, the latter being provided with parallel door jambs 0. Lateral brace members d connect the door j ambs at spaced intervals so as to provide individual door openings, and (Z are the bands encompassing the silo. The door 6 is removable, as shown. The door e is provided on the outside with verti- Specification of Letters Patent. Patent- 3d Jung 12 191?.

Application filed February 4, 1916.

Serial No. 76,212.

cal cleats f which are connected by the lateral strip of iron 9, bent in such shape as to form a ladder step. These features are, of course, common to silos. Holes are bored in the door jambs 0, near each corner of the door opening, and the inner end of each hole is provided with a bushing h, which extends only partially therethrough so as to leave room at the outer end for packing 6. Furthermore, the bore of the bushings is tangent to the edge of the door 6. A plate y, provided with a hole in axial alinement with the bushing h, is held firmly in place over the packing i by the screws 71:. A shaftlike member m is provided on its inner end with a lateral toe n and its outer end is flattened as indicated by 0. Said shaft is longitudinally and rotatably movable in the bushing h, the packing 6 serving to render the bearing air-tight. The lateral toe a is rounded on the inner side of its extremity, as indicated by Z in Fig. 3. On the flattened end 0 of the shaft m is pivoted a cam lock lever 79, the handle of which is indicated by q and the cam by r. The locking devices are preferably located near the four corners of the door opening and operate substantially as follows:

In Figs. 2 and 3, the shaft m is shown adjusted to a position where the lateral toe n will engage the rear side of the door e, and by virtue of the cam lock lever 7) the door will be clamped tightly up against the sides of the door opening and locked in place. When the door is to be removed from the door opening, the cam lock 79 is rotated vertically 180 degrees, which will release the locking engagement of the cam r with the plate The shaft m may then be moved longitudinally to the position indicated by the broken lines A in Fig. 3. By using the handle 9 of the cam lock lever 79 as a lever handle, the shaft m is then rotated about its longitudinal axis so as to throw the toe n to the position illustrated by the broken lines B in Fig. 3. The door 6 may then be readily removed.

To replace the door in air-tight locked position, the steps just enumerated are reversed. In case the locking device becomes loose, shims may be placed under the plate j to cause the cam to act more acutely.

I claim:

In a door fastening for silos, the combination of a hole in the silo adjacent the door opening, a bushing extending partially through the hole, a shaft longitudinally and rotatably mounted in the bushing, a packing gland at the outer end of said bushing, a 10 plate bearing against the outer end of the packing gland, and a cam lever pivoted on the outer end of said shaft, the cam being adapted to bear on said plate, and a lateral toe on the inner end of said shaft.


Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

Referenced by
Citing PatentFiling datePublication dateApplicantTitle
US2912845 *Aug 14, 1956Nov 17, 1959Michael MordovanecyWeather-proof slide bolt locking means
US3402958 *Mar 28, 1967Sep 24, 1968SouthcoDoor or panel fastener
US4240359 *May 19, 1978Dec 23, 1980Dorothy Elizabeth HoweFreight carrier
US4367569 *Jul 13, 1981Jan 11, 1983Bee Line CompanyCam locking pin
US5488808 *Jun 1, 1994Feb 6, 1996Allsteel Inc.Interlock for wall panel system
US5593190 *Sep 11, 1995Jan 14, 1997The United States Of America As Represented By The Secretary Of The ArmyConsistent-force quick latching system
US7059025Jan 25, 2005Jun 13, 2006Illinois Tool Work, Inc.Fastener
DE754816C *May 28, 1937Mar 9, 1953Erich NothdurftVorrichtung zum Anpressen von Siloklappen gegen einen die Silooeffnung einfassenden Grundrahmen mittels Exzenter
U.S. Classification292/257, 292/57
Cooperative ClassificationE05B65/006