US2147581A - Panic lock for doors - Google Patents

Description

Feb. 14, 1939. c J PRINZLER 2,147,581

PANIC 'LOCK FOR DOORS Filed July 30, 1934 3 Sheets-Sheet 1 1 1 .1; 5?? F1 92. ga

HI Ill lNVENTOR Car] o Prinzler,

ATTORNEY5 Feb. 14, 1939. c. J. PRINZLER I PANIC LOCK DOORS 5 Sheets-Sheet 2 Filed July 30, 1934 r /w .m m R r N 0 M W w H m 0 Y ad B 4. 4 wz w f 5 2 aw 1 d! 3 Feb. 14, 1939. c. J. PRINZLER PANIC LOOK FOR DOORS Filed July 30} 1954 3 Sheets-Sheet 3 INVENTOE ar/Jfrmz/er, BY

ATTORNEYS Patented Feb. 14, 1939 UNITED STATES PATENT OFFICE.

PANIC LOCK FOR DOORS Application July 30, 1934, Serial No. 737,508

Claims.

In public buildings where large assemblages gather, especially in schools, auditoriums, theaters, churches, etc., it has been found desirable to equip main entrance doors with bolting or 5 latching elements which must be. fully retractible by means of a so-called panic bar extending lateraly across the face of the door.

Doors of this type are manipulated by large numbers of persons, many of whom are inclined to exert unnecessary force for manipulation, so that the structures are damaged to the extent of inoperativeness. Extreme accuracy of bolt retraction is absolutely essential at all times and under all conditions in order to afford adequate insurance of operability under panic conditions and much difficulty has heretofore been experienced in maintenance of bolting mechanism of this type.

The object of my present invention is, therefore, to produce a bolt-retracting structure of such extreme simplicity and ruggedness that it will withstand all of the stresses to which it may be subjected and remain at all times in such condition as to be capable, under panic conditions, of fully retracting the door-restraining elements.

The accompanying drawings illustrate a commercial embodiment of my invention.

Fig. 1 is a rear elevation, the cover plate for the dead-lock plate being shown in Fig. let for the sake of clearness of illustration;

Fig. 1a a plan of the dead-lock cover-plate;

Fig. 2 is a rear elevation with certain parts removed to expose the parts to which the doorretaining bolts or latches (not shown) are directly connected;

Fig. 3 is a section on line 33 of Fig. 1;

Fig. 4 is a view similar to Fig. 2 but with some parts removed from the main casing;

Fig. 5 is a view similar to Fig. 4 but with all removable parts extracted from the main cas- Fig. 6 a sectional perspective, on an enlarged scale, through the pivotal axis of the panic bar;

Fig. '7 a longitudinal section, of the lower bolt actuator;

Fig. 8 a side elevation of the actuator shown in Fig. 7;

50 Fig. 9 a side elevation of the upper bolt actuator;

Fig. 10 a section on line llllll of Fig. 1;

Fig. 11 a longitudinal section medially of Fig. 1;

Fig. 12 an elevation of the rear face of the 55 cam-carrying plate; and

Fig. 13 an elevation of the front face of the cam-carrying plate.

In the drawings C indicates a main shell or casing comprising a relatively thick front plate [0 and side walls H. In order to insure a long lift of dependable operation I have found it necessary to form this part of metal by a die forging operation.

At appropriate points between the side walls I provide integral portions 12 having a depth 10 nearly equal to that of the side walls and perforated through the face of plate Ill, as indicated at 13. These comparatively long perforations, which are for the reception of fastening screws, insure an axial guidance for the fastening screws 15 (not shown) so that careless workmen may not, by a canting of such screws into the door, inaccurately set the casing on a door, or unduly stress it.

The ends of portions l2 lie in a common plane and serve as a support for the cam-carrying plate 14 which is held in place by screws l5 threaded into perforations IS in portions l2.

The spaces 17 and 18, respectively at the upper and lower endsof the casing, between adjacent 25 pairs of portions 12 form guide ways, respectively, for the upper and lower bolt actuators B and B.

Tongues 2|, 22, 23, and 24, the purposes of which will be made to appear, depend integrally from the front plate. 3

Integrally rising from the outer face of the front plate are laterally spaced ears 25, 25 which are strongly braced, top and bottom, respectively, by integral fillets 26, 2'1, the fillet 26 extending upwardly for a considerable distance to afford additional thickness in the top plate to permit the formation of a pocket 28 (Fig. 5) in the under face of the plate ill. In order to extend the axial dimension of this bore without unduly increasing weight or interfering with moving parts, a circular flange 2t depends integrally from the under face of plate I0.

Plate [0, between ears 25, is perforated, at 29 to afford access to the interior of the casing.

The ears 25 are transversely perforated with alined perforations 25' in which is journalled a pin till retained in the operating lever 35 by a screw 32 which is placed in the most nearly inaccessible position, as shown in Fig. 11, so as to be the least tempting to mischievous persons. The lever 31 forms the support for one end of the usual panic-bar, not shown, which extends laterally across the face of the door, and one arm, 3!, of this lever projects through perforation 29 into the interior of easing C for engagement with one of the bolt actuators, to be described. This lever may be subjected to heavy stresses and if it, or casing C, is distorted by those stresses, the necessary accuracy of operation of the bolts is thereafter impossible and loss of lives may result. It is for this reason that the ears 25 are made very sturdy, as described, and lever 3| is also made as a die forging with an accurately positioned abutment 3|" on its arm 3| to engage the inner surface 26' of casing C so as to accurately limit the actuating movement of the lever. The sturdy character of the ears 25 and immediately adjacent portions of easing C eliminates all possibility of springing the casing to disturb accurate actuation of the bolt actuators, to be described.

Also integrally depending from the inner surface of plate H) is a pin 35 upon which is journalled the rocker arm 38 which is provided at its opposite ends with the open notches 36' and 36".

slidably mounted in guide way I1 is the portion 31 of the upper bolt actuator B which comprises a portion 38 parallel with but laterally offset relative to portion 31, said portion terminating in a laterally offset toe 39 in line with portion 31. Intermediate its length, portion 38 is provided with an integral stud 40 upon which is sleeved a sleeve 4| of metal different from rocker arm 36 and fitting slot 38'. Formed in portion 31 of actuator B is an open-sided spring pocket 42, open at its lower end and having a spring abutment 43 at its upper end. In this pocket, between abutment 43 and tongue 2| is mounted a compression spring 44 which yieldingly projects actuator B. Portion 38 lies slidably between tongue 22 and the adjacent Wall H of easing C.

Slidably mounted in guideway I8 is the portion 46 of the lower bolt actuator B which is provided at its upper end with laterally spaced fingers 47 and 48. Finger 4'! overlies portion 38 of actuator B and finger 48 lies slidably between tongue 3 and the adjacent wall I I of easing C. The upper end of finger 48 carries an integral pin 49 upon which is a sleeve 50, like sleeve 4|, and fitting notch 36". At 5|, actuator B is provided with an open-sided spring pocket 52 open at its upper end and provided at its lower end with a spring abutment 53, between which and tongue 24 is mounted a compression spring 54.

Actuator B is medially perforated at 55 to form a downwardly-presented surface 58 which is upwardly engaged by the inner end of arm 3| of lever 3|.

Portion 39, of actuator B, when the two actuators B and B are fully extended closely underlies the inner end of arm 3|, as shown in Fig. 2, so that the actuators may be retracted by movement of lever 3| in either direction from its normal medial position.

Each of the bolt actuators B and B is provided at its outer end with a pocket 60 (Fig. '7) in which is swiveled the ball head SI of a threaded shank 52 to which a stretcher rod (not shown) may be connected for extension to a door-retaining bolt or latch of desired form.

The bolt actuators B and B are retained within casing C by the plate M which rests upon the ends of parts l2 of the casing and is removably held thereon by screws l5, said plate having perforations l3 which register with perforations l3 of the casing.

Plate l4 lies closely over surfaces 61 formed on actuator B so as to guide said actuator in its movements.

One face of plate I4 is provided with an integral lug 65 which registers with lug 35 and serves as a partial journal for the rocker arm 36. A screw 66 passes through lug 65 into lug 35.

Journalled in plate I4 is the cam shank 68 which also journals in pocket 28 and carries an integral cam 89, the opposite arms of which underlie lugs 18 carried by fingers 41 and 48. One end of shank 88 is polygonal, as indicated at B8 and over this portion is non-rotatively sleeved a plate 1| retained in place by a cotter pin 12. Portion 68' has an axial polygonal pocket 68" for the non-rotative reception of a knob shank (not shown) so that the bolt actuators may be knobmanipulated from the exterior of the door.

In order to lock the door against opening from the outside plate H is provided with a radial finger 1| over which may be projected the notched edge 15 of a locking plate 15 slidably mounted on plate I4 and guided between lugs 18 integral with plate l4.

Journalled in plate I4 is a key-controlled head 19 having a radially projected finger 88 turnable into notch 8| of plate 76 to shift its notch 15 into and out of straddling association with finger A spring 82, attached to plate 13, engages with the cam lug 83 on plate I4 to retain plate 16 in either extreme of its movement. A cover plate 84, resting upon lugs 18 and 83, and held in place by a screw passing through perforation 85 and threaded into lug 86 of plate l4, serves to retain plate 16 between its guiding lugs.

In order to prevent undue wear during heavy traffic periods when freedom of ingress is desirable, lever 3| may be locked in depressed, boltretracting position by screw 90 (Fig. 3), the inner end of which may be projected into pocket 9| formed in one side of arm 3| of said lever. Screw 90 should be difficult of access, in order to prevent mischievous tampering, and therefore is submerged in the base of one car 25 and provided with a polygonal socket 92 by which it must be manipulated. The outer end of the threaded hole in which this screw is mounted is peaned over the screw to prevent removal.

The parts M, B, B, 3|, 38, 88, as well as casing C are die forgings so that the structure as a whole is very strong, in spite of its compactness, so that a long life of continuous accuracy, and consequent safety, is assured.

Particular attention is called to the open-sided, open-ended spring pockets formed in the actuators B and B, which pockets, in conjunction with adjacent portions of the casing C form complete enclosures for the springs 44 and 54, which enclosures prevent any substantial buckling of the springs. In devices of this type, where the springs are subjected to many thousands of compressions, it is of the utmost importance that the highest degree of insurance be provided against breakage. In times past a number of instances have been known where broken springs have served to block bolt manipulation at a panic time. The present construction insures long spring life.

I claim as my invention:

1. In a panic look, a main die-forged metal casing comprising a top plate, integral depending side walls and laterally separated ears backed by a heavy connecting fillet integral with the ears and top plate, an operating lever pivoted between the ears with a manually engageable portion and an inner arm lying between the ears and projecting into the casing and having a throwlimiting portion engageable with an exposed portion of said fillet, a die-forged bolt actuator slidably mounted within the casing with a portion projected from one end of the casing and a laterally offset pin-carrying portion guided between a side wall of the casing and an integral lug depending from the casing top plate, said first-mentioned portion of said actuator having an open-sided spring pocket with an open end, a spring arranged in said pocket and abutting an integral lug of the casing, said actuator at its inner end having an inwardly-projecting toe, a second die-forged bolt actuator slidably mounted in the casing with a portion projected from one end of the casing, a medial lever-engageable surface, a pair of laterally separated fingers one overlyng the first bolt actuator, and the other carrying a pin, and an open-sided spring pocket with one open end, a spring mounted in said pocket and abutting an integral casing lug, the said toe and leVer-engageable surface lying upon opposite sides of the inner end of the operating lever, a retaining plate overlying said bolt actuators, a rocker arm journalled upon a pin integral with the casing top plate and a pin integral with said retaining plate and having pinengaging portions straddling the pins of the bolt actuators, and a cam shaft journalled in said retaining plate with one end journalled in a pocket in the casing top plate and the other end formed for knob actuation, said cam shaft having a pair of divergent arms each having a one-way engagement with the second bolt actuator.

2. In a panic look, a die-forged casing cornprising a top plate and depending side walls, a rocker-arm pivot integral with the inner face of the top plate, and a cam-shaft pocket independent of said pivot and formed in the inner face of the casing top-plate.

3. In a panic look, a die-forged casing ,comprising a top plate and depending side walls, a rocker-arm pivot integral with the inner face of the top plate, and a cam-shaft pocket independent of said pivot and formed in the inner face of the casing top-plate and axially extended by a flange depending integrally from said inner face.

4. In a look a main body comprising integral top-plate, depending side walls, and a spring abutment adjacent and substantially normal to one of said side walls, a bolt actuator slidably mounted between said side walls with a portion adjacent the inner end of said abutment and alongside one of said side walls, said portion being flanked by a plate-like portion substantially normal to said side Wall and substantially parallel with the top-plate, and a spring nested in the space between said plate-like portion of the actuator and the top-plate of the main body, said spring being abutted at one end on said spring abutment and at the other end upon the bolt actuator.

5. In a look a main body comprising integral top-plate, depending side walls, and a spring abutment substantially normal to the top-plate between and spaced from the side walls, a bolt actuator slidably mountel between said side walls and having an open-ended, open-sided CARL J. PRINZLER.

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