US1887210A - Refrigerator doorlock - Google Patents

Description

Nov. 8, 1932. J. MILLER REFRIGERATOR DOORLOCK Filed April 15, 1951 R o 5 R Mn N: MN EL R W w H f Gov mv R Patented Nov. 8, 1932 r JOSEPH MILLER, or mnmmroms, MINNESOTA REFRIGERATOR DOORLOCK Application filed April 15,

This invention relates to new and useful improvements in refrigerator door locks, and an object of the invention is to provide such a device of simple and inexpenslve contion of a portion of a truck body and door 55 I struction, and which is particularly applicable for use in connection with the doors of refrigerator truck bodies,

A further object of'the invention is to provide a refrigerator door lock comprising a base plate adapted to'be secured to asuitable support such as a refrigerator door, and having spaced apart bearings thereonadapted to receive a rock shaft provided at one end with a crank, and saidshaft also 5 having an operating handle whereby it may be conveniently operated to actuate the lock and said look also including a keeper comprising a base portion adapted to be secured to a support'such asa door amb, said keeper having an outwardly projecting web thereon provided with acam face adapted to be engaged by said crank to thereby secure" the door in locked position, said cam face being "shaped so as to prevent the crank from accidentally becoming disengaged from said keeper, when in locked position, and when the vehicle is traveling over rough ground, and means whereby said crank may be locked in engagement with said cam face to prevent an unauthorized person from opening said lock.

A further object is to provide a refrigeri ator door lock of simple and inexpensive con-' struction, which is so designed that it cannot accidentally become unlocked, due to vibration and jarring of the truck body, when the vehicle is in motion, and also whereby the'door may be securely locked a against its seat to prevent the circulation of air between the door and its seat,

Other objects of the inventionwill appear from the following description andflaccompanying drawing and will be pointed out in the annexed claims.

In the accompanying drawing, therehas been disclosed a structure designed to carry out the various objects of the invention, but it is to be understood that the invention is not confined to the exact features shown as 1931. Serial No. 530,305.

various changes may be made within the scope ofthe claims which follow.

In the drawing: 3

Figure 1 is a view showing a front elevawith my improved lock applied thereto;

Figure 2 is a vertical sectional view on the line 2-2 of Figure 1, showing the operating lever and the means whereby said lever may be locked in door closing position;

Figure 3 is a plan view of Figure 1;

Figure 4 is a detail sectional view on the v line 44 of Figure 1; and

Figure'5 is a detail sectional view onthe line 5-5 of Figure 1. v

Thenovel lock featured in this invention, ,7 comprises a base plate 2 providedwith suit able apertures whereby itmay be securedto a support such, for example, as the surface of a door 3, by such means as bolts or rivets 4. The base plate 2 is provided with abearing 5 shown integrally formed therewith, and a bearing 6' which is secured to the base plate 2 by means of rivets or bolts 7. The bearing 6 is shown comprising a cap 8, U-shaped in configuration, and adapted to be fitted over 1 a raised portion 9 provided upon the base 2. The cap 8 has oppositely extending strap portions 11 adapted to be seated upon the base 2 and having apertures therein alined with the apertures in the base adapted to receive the rivets 7 as shown in Figure 4. The projection 9 on the base 2 is provided with a rounded seat which cooperates with the interior of the cap 8to provide a bore 12 adapted toreceive one end of a rock shaft 13, which will next bedescribed; I

The'rock shaft 13 is supported in the bearings5 and 6 and has a crank pin 14 provided at one end thereof, as shown in the drawing; The bearings are spaced apart as shown in Figure 1, and an operating handle 15 is secured to the rock shaft between the bearings and has an end portion 16 adapted to engage a plate 17 having an eye or staple 18 adapted to be received in an elongated aper-- ture or slot 19 provided in the end portion 16 of the operating handle 15. This staple extends through the aperture 19 to provide means for receiving an ordinary lock, where-h by the operating handle may be locked in the position shown in Figures 1 and 2.

A keeper comprising a base portion 21 is adapted to be secured to the door jamb and has an outwardly projecting web portion 22 provided with a cam face 23 adapted to be engaged by the crank pin 14, as shown in Figures 2 and 5. The cam face 23 is provided with a low portion 24 adapted to engage the crank pin 14 when the operating lever is in the full line position in Figures 1 and 2, whereby the cam will tend to retain the operating lever in such position that it cannot accidentally move into unlocking position.

An aperture 25is provided in the out wardly projecting web 22 of the keeper adapted to receive an ordinary padlock 26,

as shown in Figures 3 and 5, whereby the crank pin cannot be moved out of engagement with the keeper to permit unauthorized opening of the door. The keeper is secured to the door 27, as show i The novel lock featured in this invention is particularly well adapted for use in connection with doors of refrigerator truck bodies. The cam face 23 is so designed that when the' lo ck is in door-closing position, it

cannot accidentally become unlocked, due

to vibration and jarring of the vehicle-body. The cam'will also cause the door to be held tightly against its seat, regardless of twisting or torsional strains imparted to the veihicle body. To open the lock, the operating lever is swung upwardly to the dotted line position, shown in Figure 2, whereby the crank pin will be moved to an'elevation above the upper edge 28 of the cam 23, so that the d'cra'nk pm may pass over this edge. To look the door, the door is moved into engagement with its seat while the operating handle is held in an elevated position, and the operating lever is then moved downwardly ""fro'm the dotted to the full line position,

shown in Figure 2, whereupon the crank pin 14 will engage the cam face 23 and tightly force the door into engagement with its seatl When the crankpin reaches the low spot 24 0 in the cam, shown in full lines in Figure 2,

it will remain in such position and thereby prevent the look from accidentally opening. The construction of the lock is very simple and inexpensive and requires very little machine work to finish it.

It is preferably made of cast metal and because of the cap 6 being detachably secured to the base, as shown in Figure 4, the rock shaft may be engaged with the bearing in position over the'raised portion 9 of the base, whereby a very substantial support is provided for the rock shaft, and whereby strains and other abuses to which locks of this'character are usually subjected, will not 7 effect the operation of the lock.

jamb'by suitable bolts or rivets 5, after which the cap 6 is secured von said Web adapted to be engaged by said crank pin whereby the door may be forced onto itsseat by manipulation of said handle, said cam also functioning to retain the crank in door-locking position.

2. A refrigerator door lock comprising a crank, a supporting shaft therefor, a base plate having bearings thereon adapted to receive andsupport said shaft, an operating handle secured to the shaft whereby said crank may be operated, a keeper comprising a base plate having an outwardly projecting web thereon provided with an aperture adapted to receive a padlock, a cam face also on said flange adapted to be engaged by said crank to lock the 'door in closed position, said cam face having a depression therein adapted to be engaged by said crank, when the door is in locked position, to prevent s aid crank from accidentally becoming disengaged from the cam.

'3. A refrigerator door lock comprising a crank, a support ng shaft therefor, a base plate, a bearing fixed to said base plate and adapted to receive and support one end of said shaft, a cap demountably secured to said base plate and cooperating with a fixed raised portion thereon to provide a bearing adapted to support the opposite end of the shaft, an operating handle secured to the shaft between said bearings whereby said shaft may be operated to actuate said crank, a keeper comprising a base plate having an outwardly projecting web thereon, and a cam faceon said web adapted to beJengaged by said crank to lock the door in closed position, said cam face having a depression therein adapted to be engaged by said crank, when the door is in locked position. j

4. A door lock comprising a rock shaft provided at one end with a crank pin and also having an operating handle whereby said shaft maybe actuated, a support for securing the shaft to a door, a keeper adapted to be secured to a fixed member and having an outwardly projecting web provided with a cam face adapted to be engaged by said set my

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