US1564729A - Mechanical movement for doorbolts and the like - Google Patents

Description

Dec. 8, 1925. 1,564,729

' A. VON SCHRENK MECHANICAL MOVEMENT FOR DOORBOLTS AND THE LIKE Filed Oct. 25, 1922 2 Sheets-Sheet 1 ljgil. E92.

2:5 ,25 o o; 0 cl .28 a o o o 2/ gvweuloz Mama:- HRWULD VUNE'UHRENK Dec. 8, 1925. 1,564,729 .A. VON SCHRENK MECHANICAL MOVEMENT FOR DOORBOLTS AND THE LIKE Filed Oct. 25, 1922 '2 Sheets-Sheet 2 snow/lot Patented Dec. 8, 1925.

UNITED S A ES PATENr OFFICE; j-

ARNOLD VON sormnivx, 0F TUoKAnon, new YORK.

MECHANICAL MOVEMENT FORYDOORBOLTS QANDITHE LIKE.

Application filed 0ctober25, 1922. -Serial No. 596,750.

1 exert-ion of a relatively small fraction of the power in order to control the applicationof the potential energy. It involves the further development of the invention ofthe principle set forth in my Patent No. 1,291,664 granted January 14, 1919, and has for its particular object the provision ofa mechanical movement of simple construction, durability, ease of operation and reliability, and in certain respects features of construction for the special application of such mechanical movement.

This application providesmore particularly for theme of the invention in or on structures such as refrigerator doors. In this and similar structures it is desired to apply considerable force to actuate certain intermittent operating devices as, for -example, the locks on a refrigerator door which must be tightly closed and therefore requires a predetermined and considerable pressure. While dilferent operators may exert a varying pressure or fail to apply sulficient force for the proper actuation of the structure, this invention provides for mechanical parts to exert the predetermined pressure at all times with only a slight and relatively small power application on the part of the operator. Thus the force closing the doors, or similar operation, does not depend upon any varyingeffort on the part of different operators or the same operator, and still more, a single movement well within the limits of any operators power results in the same power application from the stored potential energy member with uniformity and at all times.

In the case of refrigerator doors, a plurality of bolts at different parts of the periphery of the door can all be actuated by a single power application from a single unit of predetermined potential power, and the control of. the actuation may be effected by a single lever requiring but a small frac-' tion ofeifort compared with the power actuating the bolt or bolts.

In the accompanying drawings forming-a part hereof, P i i a I Fig. 1 is a front elevation of a'refrigerator door showing the mechanical movement to operate a'single bolt, the cover of the mecha nism being removed.

Fig. 2 is a fragmentary view, .front elevation, of a door showing the mechanism controlling two bolts with a single operating lever. V p e F 1g. 3 1s a fragmentary view'showing the mechanical movement on a large scale with the casing removed, shown in detail.

Fig. 4 is a cross-section of the'latch or bolt and bolt socket of Fig. 3, on a larger scale. 1 3

Referring to the figures, 1.is a floating lever which operates on a movable fulcrum 3, shaped like a roller, the position of which can be varied byshifting the rod 4, to which it is attached; A spring 2 isconnected to one end of the floating lever 1. The other end of spring 2*is connected to a second lever 5, which turns on a fixed pin 6. Spring 2 is attachedto the two levers 1 and 5 in such a way as to be under compression in the arrangement of elements 'herein shown. But with another arrangement it might be under tension. Theends'of levers 1 and 5 opposite to spring 2 are connected together by a link 7. Link 7 moves in a guide 15, and its end is formed into a door catch 16 having a taper end which engages with a recessed fitting 17 rigidly secured to the doorjamb 20. An operating handle 10 carries a toothed sector 11, which meshes with a rack 12 attached to the fulcrumcarrying rod 4;. The rod 4 moves on rollers 13, 13, and is held in place by fixed guides 14, 14. The floating lever l is prevented from displacement by a link 8, which turns on a fixed pin 9.

As the forces exerted at the opposite ends of spring 2v are of equal value, at all times,

it is obvious that this system of levers and links will be in equilibrium if the movable fulcrum 3 is moved to a position such that the arms of floating lever l will have the same ratio as the arms of lever 5. This equilibrium position of the fulcrum is denoted by the line a-a. If the fulcrum 3 drives rack 12 and rod 4 in a downward direction, thus moving fulcrum 3 below the. equilibrium line aa, and causing the power'of: the sprin'g 2 to' be exerted in such a manner as to move link 7 to the right. This will shove the taper end of catch 16 into the recess of fitting 17 thuspressin'g the door 19 tightly against the door jamb 20.

The entire mechanical movement is assembled on a plate 18, which is bolted to the door 19. The shaft of, handle 10 and sector 11 may extend through the door, so that the device may be operated from either side ofthe door.v

A spring 21 may be arranged to cooperate with the rod 4:.to keeplthe fulcrum 3 normally below the equilibrium line a-a, and thus, hold the catch16 in the closed position unless the, handle 10 israised. In this way the door andfastener may be made self closing.

If. desired,the taper end 16 may be replaced by a roller 26, cooperating with a suitable fitting 27 attached to the door. jamb, as shown in Fig. 2. In the case of large and heavy doors for which it is desired to have more than. one fastening, the link 8 may be replaced by a bell crank, 22, which operates in connectionwith a rod 23,, bell crank 24 and rod 28, Working in the guide 25, to push the catch 26 into the fitting 27, as shownin Fig. 2. The number of, these fastenings may be multiplied as much as is desirable.

In the application ofniy invention, other forms of' springs maybe used and other sources of power maybeemployed, such, for instance, as compressed air, hydraulicpower, steam, magnetism, and so on, and other arrangements of the various elements,,ma;y;be made, within the, scope of my invention. I do not confine myself tothe exact constructions herein shown and described, but what I claim and desire to secure by Letters Patent is :v

1. A mechanical movement for control of intermittent operating mechanism comprising'a reciprocating member and a supportmg gulde therefor, a potential energy element connected therewith and intervening leversincluding a floating lever and a shiftbolts and the, like including apower-delivering element and means for applying the en? ergy thereof to press said bolt, said means including ajfloating lever and a shiftable fulcrum therefor and manually operated means to control the application of said energy.

3. A mechanical device for reciprocating a door bolt or similar device, comprising a mechanical. potential power element, a system of balance levers associated therewith including one lever and an associated shiftable fulcrum, means: for shifting said fulcrum in one direction and means for automatically returning said fulcrum in the opposite direction to insert the bolt or like member.

4:. A mechanical, movement for operating adoor-closing device and the like, including a potential energy element, a lever with a fixed fulcrum, a floating, lever, a movable fulcrum, and means for shifting said. movable fulcrum.

5. A mechanical device for operating door bolts and the like,includinga potential source of power, a lever with a fixed fulcrum, a floating lever, a movable fulcrum for said. floating'lever, means for shifting said movable fulcrum, andgconnectinglinkee- In testimony whereof, I. have signed my name to; this application, this 30th day. of March, 1922.

ARNOLD VON SGHRENKQ.

Images