US824411A - Guard for door-keys of fire-alarm boxes and for other things. - Google Patents

Description

PATENTED JUNE 26,1906.

F. W. UOLE. GUARD FOE DOOR KEYS OF FIRE ALARM BOXES AND FOR OTHER THINGS.

APPLICATION FILED PEB.8,1906.

UNITED STATES PATENT oEEIcE.

A CORPORATION OF NEW YORK.

FREDERICK COLE. OF NEWTON, MASSACHUSETTS, ASSIGNOR TO THE GAMEWELL FIRE-ALARM TELEGRAPH ooMPANroE NEW YORK, N. Y.,'

-GUARD FOR DOOR- KEYS OF FIRE-ALARM BOXES AND FOR OTHER THlNGS Specification of Letters Patent.

Patented June 26, 1906.

Application filed February 8:1906- Serial No. 300,064-

To all whom it ma concern: g

Be it known that FREDERroK W. COLE, of Newton, county of Middlesex, State of Massachusetts, have invented an Improvement in Guards for Door-Keys of Fire-Alarm Boxes and for other Things, of which the following descri tion, in connection with the accompanying rawings,is a Specification, like characters on the drawings representing like parts. v In the construction of fire-alarm boxes it has been commonto place a guard com rising, essentially, a glass plate over the ey,

which is left inserted in the keyhole of the door, and when the lass is broken the key is accessible; but suc construction. of keyguard is objectionable, for the reason that the Iperson breaking the glass and operating the ey, is oftentimes cut by the glass when reaching in to engage and operate the key.

This mvention has for its object to construct a guard especially designed toiovercome this objection. My improved guard may, however, be used for other urposes that is to say, to cover and there y protect other things besides. the door-keys of firealarm boxes. My invention consists, essentially, in a guard comprising or consisting, essentially, of a self-openin door having a glass or other kind of frangible plate and means engaging said plate for holdmg said door closed. The door may be made self-opening by pivotin it at its lower end insuch manner that it drop by gravity when released, or an actuate ing-spring may be providedwhich bears upon a or against the door and which operates to;

open the door when permitted so to act, or

ractice both of the aforesaid means or forces or opening the door may be employed to provide against either means or force failing to act at the roper time.

The means or engaging the glass plate for sists .of a

projection either on the part to which the oor is pivoted or on some other st'ationarily-supported part, which is so constructed and arranged as to directly or indirectly enga e said plate, so that whenever the plate ls broken the door will'be released and permitted to open automatically. I So far as the means for engaging the plate is concerned I desire it to be understood that any means for engaging the glass late which when the plate is broken will re ease. a selfopening door comes within the spirit and see e of my invention.

, y invention also consists in means for engaging the glass plate for the pu ose of holdmg the door closed, which is a a ted to be operated by a suitable. key, where the ins ector may open the door without reakmg the glass. 1

Flgure 1 shows in front elevation my improved guard applied to a fire-alarm box of ordinary construction and coverin ,and'

The guard herein shown for the purpose of 1 illustrating one practical form or embodiment of my invention consists of a shell or case a, of suitable shape to surround a ke b thing to be covered and a door a, pivoted to said shell or case a. The shell or case a, is ada ted to be rigidly secured to the door (t o the fire-alarm box,

, and hence may be made as a art of said door 03, if desired. 4 The door- 0 1s hinged to the shell or case a or other fixed member at its lower end, as at c, and whenclosed occupies an u right position and'the pivots are set well back, so that the weight of the door is essentially in front of said ivot. By so ivoting the door it will be 0 served that w en the door is released it will drop by gravity, being thereby self-o enin'g. Aflat spring c is secured tothe she l or' case a,-tl1e outer or free end of which bears upon the lower edge or part of the door, the action of which is to open the door whenever the door is released.

- of a fire-alarm box or it may be any ot er and thereby protected,

While I have herein shown two means ory forces for o ening the 'door automatically whenever it is released, I desire it to be understood that I may employ either one of these means or forces to t e exclusion of the other; but in practice I prefer to employ both sea i1 1 to limit my invention to pivoting the door at its lower end, as it is obvious that it may be otherwise pivoted and adapted to be automatically opened by a spring whenever it is released.

The door 0, as herein shown, is made as a quadrangular or other sha edframe and contains a g assplate d, whic is adapted to be broken for the purpose of releasing the door, and hence said door is so constructed as to provide for the easy renewal of the plate d, and, as herein shown, said frame is provided with guideways c at its opposite sides, adapted to receive the plate (1, and with a lug c at its lower end, 11 on which the lower edge of the plate rests w on properly disposed. in the frame, and said frame is provided at its up per end with a recess 0 next the glasspl-ate d, which is adapted to receive a projection e, whichwhen contained said recess will overlie and thereby engage the glass plate (1, and thereby hold the door closed. The manner of providing for the easy renewal of the plate 11 is immaterial so far as my invention is concerned, although the articular manner herein shown possesses a vantages on account of its simplicity of construction and eflective manner of holding the plate.

As herein shown, the guideways for the plate extend to the top of the frame or there about, and the glass plate is introduced at the top of the frame, and when the door is closed said plate will rest by gravity on the lug c andwhen the door is open said glass plate or any broken portions thereof have not previously fallen out will be free to slide downward and leave the frame. The pro'ection e, which engages the plate d'to hell the door closed, is arranged atthe to of the shell or case a, or it may be arrange on some other part which is stationary with respect to the seli-opening door and, as herein shown, is made movable into and out of position to engage the plate (2, and a suitable key is adapted to beinserted in a keyhole e, (see dotted lines, Fig. 2,) for the purpose of mov- -ingsaid projection c, said key being provided for the use of inspectors who desire to open the door without breaking the glass. It will be seen that the projection 2 thus serves as a means for engaging the plate d and that it is arranged in the shell. or case a, which thus serves as a stationary member or support for it but I desire it to be understood that I may employ any other means for engaging the plate directly orindirectly in lieu of the projection c herein shown for the purpose of holding the self-opening door having the glass plate in closed position against the action of the means provided for opening said door. In view of the fact that the shell or case a, may be formed as a part of the door 03 or as a part of any other member which is stationary with respect to the self-opening door it will be seen that the guard proper consists, essentially, of the self-o ening door, which is prevented from opening yfa piece of glass.

Having thus described my invention, what I claim as new, and desire to secure by Let ters Patent, isr l. A guard consisting of a self-opening door having a glass plate, and means, engagin said plate, for holding said door closed, so. stantia-lly as described.

' 2. A guard consisting of a door having a glass plate, a spring for opening said door, and means, engaging said plate, for holding said door closed, substantially as described.

3. A guard consisting of a door having a glass plate, and constructed and arranged to open by gravity, and means, engaging said plate, for holding said door closed, substantially as described.

4. A guard consisting of a door pivoted at its lower end and having a glass plate, and means, engaging said late, for holding the door closed, substantia ly as described.

5. A guard consisting of a door comprising a frame having guideways at its opposite sides, and a log at its lower end, a glass plate supported by said frame, and means for engaging said plate for holding the door closed, I

substantially as described.

6. A guard consisting of a self-opening door having a glass late, and a projection, which engages said p late and holds the door closed, substantially as described.

7. A guard consisting of a self-opening door having a glass plate, and a movable projection, which engages said plate and holds the door closed, said projection being movable into and out of engagement with the plate, substantially as described.

. In testimony whereof I have signed my name to this specification in the presence of two subscribing Witnesses.

FREDERICK W. COLE. ll itnessesz B. J. Novas, H. B. DAvrs.

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