US1734341A - Alarm mechanism - Google Patents

Description

NOV. 5, 1929. A 'G PAPPADAK|$ 1,734,341

ALARM MECHANI SM Filed F'eb- 5, 1929 2 Sheets-Sheet l ATl'OR EY Patented Nov. I, 19729 ANDRU G. PAPPADAKIS, OF DETROIT, MICHIGAN ALARM MECHANISM Application filed February 6, 1929. Serial No. 337,944.

rIhis invention relates to a new and improved alarm mechanism, particularly of the type that sounds an alarm during the rotation ot the knob of a door lock.

5 It is the object ot' this invention, among other things, to provide simple and effective mechanism of this character, wherein the alarm elements are arranged so as to be placed in either an operative or inoperative position and no alarm will sound when in the inoperative position; a further object being toadapt this mechanism i'ory use on a Figure 1 1s a view of a lock having my im-` provement associated therewith, the cover' thereof being removed and the interior mechanism partly in sect-ion;

3o Figure 2 is a view of a lock with a portion of a door associated therewith, the parts in section being taken generally upon line 2-2 of Figure 1;

Figure 8 is a'r transverse sectional view,

taken generallyupon line 3 3 ot Figure 1;

Figure Il is a detail view of one of the latches in its retracted position;

Figure 5 is a transverse sectional view thereoi, taken generally upon line 5-5 of Figure 2;

Figure 6 is a detail view ot a portion of the lock case, taken generally upon line 6 6 of Figure 1;

Figure 7 is a perspective view ot the rock arm;

Figure 8 is fragmentarysectional detail view of the mechanism for holding one of the latches against movement;

Figure 9 is a detail view of one of the latches in its retracted position;

Figure 10 is detail sectional view of a portion of the lock, taken generally uponline 10--10 ot Figure 1; and

Figure 11 illustrates my improved mechanism as adapted for use upon the door of a nloving car, such as a motor vehicle or the i re.

The bell and the particular mechanism for striking the same are of the same general type as is shown in Letters Patent N o. 1,632,499, issued to me June 14, 1927, and consist essentially ot a bell 10 mounted upon a post 11, upon which is loosely mounted the hammer carrier 12, held against axial movement by the collar 68 and upon which are mounted the hammers 13 with a free lateral movement.

Slidably mounted within the lock case 14 is a latch 15 secured to the outer end ot rods 16, which are joined at their rear ends by a tail piece 17 having outwardly Haring arms 18 thereon and provided with a recess 19 in its lower' edge which by its engagement with the rib 20 on the lock case is held in proper alignment and against lateral displacement. f

Betweenthe tail piece 17 and the Xed plate 21 is operatively mounted the hub 22 upon the spindle 23 rotated by knobs 24 of any preferred iorm upon the Outer ends thereof. This hub is provided with wings 25, which are in substantially the same plane and contact with the outwardly Haring arms 1S o'f the tail piece 17 so that rotation of the spindle 23 in either direction will move the 85 latch 15 to its retracted position and the springs 26 on the rods 16 will return the same to its out position as soon as rotary pressure on the spindle 23 is released.

A rib 28 on the lock case projects inwardly 90 from the face plate 27 and supports the latch 15 in alignment with the opening in the face y plate particularly while moving to and from itsk retracted position.

Fixed to one ot the wings 25 is a sector 29, 95 the teeth of which mesh into those of a sector 30 rotatably mounted upon the post 11.

Rotatably mounted upon the post 31 fixed in the lock case is a gear 32 having formed thereon a pinion 33, the teeth of which mesh into those ot the sector 3d integral with the sector 30 but having a larger radius. rEhe teeth or the gear 32 mesh into those orp a pinion 35 forming part of the hammer l2.

A spring 36 bears against one Jace of the gear 32 and applies lateral pressure thereto in one direction. l

Rotation ot the spindle 23 'when the teeth of the pinion 33 are in mesh with. those of the sector 3e rotates the hammer carrier l2, and the hammers 13, thrown out hy centriugal torce, strike the inside of the hell or projections thereon and sound the alarm.

l/Vhen the teeth ot the pinion 33 are disengaged :trom those of the sector 3e, as shown in Figure 2', rotation ot the spinal viii not actuate the hammer carrier l2, and ience no alarm will be sounded.

The gear 32 is moved axially a of the pinion 33 disengaged from sector 3d loy moving the gear 32 3l against the tension of the spr'n o. ylhis is accomplished through a slide having a yoke end 33 with a slightly tapered upper 1 Jl v e those oi the n the post nfl the teeth 'tace 39 Which straddles the post 3l an projects under the pinion 33. This slide 3! is movahly connected With one end of a rock arm d() which is mounted in lug l on the screw s2. Pivotally connected to opposite ends of the rock arm are the push buttons 43 and del, Which project through openings in the face plate 27 and in their out positions are substantially hush with the tace thereof and in their in positions are substantially flush with the inner :tace thereof, as shoyvn in Figure l. The openings through 1which the push hut-tons d3 and project are counterbored for the more ready manual actuation oi the push buttons in a man Well known in the art.

To prevent accidental movement slide 3T the rock arm is held under in its extreme positions by means of a r end'button i5 that is moved in one d` by a spring do held and tensioned hy screw 47 and contacting with the angular faces d8 on the rock arm, which are joined at theirl inner ends hy the ridge portion Pressure ot the spring i6 is su'hicient to hold the rock arm e() against accidental movement but not to prevent its manual movement, during vwhich time the hutten 45 rides on of the angular faces d8 and over the top ot the ridge e9. This cannot he accon except When pressure is applied to arm through either of the push buttons and 44.

When the slide 37 is moved outwarthrough manipulation of the push hutten the spring 36 moves the gear along the post 3l so that the teeth of the pinion are returned into engagement With those orn e sector 34.

Heretoiiore the hammer carrier disenga ing mechanism Wasoperated adjacent Maasai post supporting the hammer carrier with the result that when out ot engagement with its operative mechanism it is tree to move except as the same may be held loy the tension ot a spring. This ordinarily is not sui'iicientto prevent the rotation of the hammer carrier and the hammers 13, trom striking the bell. if the lock is associated With a moving hody, such as an automobile or the like. Hence, such mechanism is not adapted for a. lock used for this latter purpose because the rattle and annoyance caused by a free hammer carrier.

lilith my improved mechanism the hammer carrier is never tree to rotate because it is held hy the pinion 35 and gear 32 and the disengaging means is not associated with the hammer carrier directly or with the post upon Which it is supported. Therefore, there are no free or rotating' parts in my improved mechanism, which is therefore adapted for use with locks on moving vehicles.

ln -Figure l1 is shown the arrangement 1 oil the gears when particularly adapted for use on a lock for a motor vehicle or the like, wherein a handle 50 is substituted for the door knob and a sector l substituted for the sector 29, which in their inoperative posi tions are associated substantially as shown in 7Eigure l0, so that movement ot the handle o() actuates the latch l5.

As the handle 50 to open the door moves in only one direction, the sectors 5l and 34: can operate their full length and give more rotation to the hammer carrier and hence a longer alarm.

rEhe latch 52 is mounted and supported in substantially the same manner as the latch l5 by the rib 53 and operated through a hub 5d, the Wings 55 of which engage a tail piece 56 associated with the rods 57. rlhe latch 52 is moved in one direction through manipulation of a key 5S through the hub si in a Well known manner and may be locked against movement in either its in or out positions as may be desired.

rlhe latch 52 is actuated from the inside of the door by a button 59 journaled in a lined collar and held against endvvise movement therein by a retaininG` screi.v Gl the like, which projects into an annular groove the button 59. @n the lower end of this button 59 are lugs 62, Which project into a rece 73L in lthe Collar 63, rotatably mounted in tl lock case and having wings 6d thereon, which engage the tail piece 56 and provide means tor manipulating the latch 52. rfhis latch is held in either its in or out positions bv plug 65 axially and rotatably mounted] in the button 59 through the button 66 thereon.

ln Figure 5 the end of the plug G5 is below the top of the tail piece 56 and thus prevents movement or the latch 52 by the 1irey 58 or otherwise.

To lock the latch in its retracted position the plug y is moved downwardly so that one wall rests against the face of the button 67 on the tail piece In such position it is held against accidental movement by a pin 68 lined in the plug, which projectsy into a slot 69 in the button 59, and engages a shoulder 70 therein under the tension ot' a spring 7l. A slight rotation of the button G6 disengages the pin 68 from the shoulder ZO and the spring moves the plug axially and out of the path ot the tail piece 56. 1When the plug is moved manually in a reverse direction, the pin G8 engages the angular wall 72 of the slot and rotates the plug slightly so as to move the pin GS under the shoulder 70. lli/Then the button 66' is then released the spring 7l moves the plug so that the pin G8 engages and is held against said shoulder. y

As designed and constructed the button 5S) and associated parts are conveniently connected with the lock and separated therefrom by reason of the intermeshing engagement oit the lugs G2 with the recess T2 in the collar 63.

The door lock is shown as set in the edge of the door, but it may be applied and will operate equally as well if set in one side o'i the door or attached to such side.

There are minor changes and alterations that may be made within my invention and I would therefore have it understood that I do not limit myself to the exact construction erein shown and described but claim all that falls fairly within the spirit and scope ot the appended claims.

7What I claim as new by Letters Patent,

l. In a device ot'the character described, having a case; a latch; means for artuating the latch; an alarm mechanism having an operative connection therewith and set in motion by the latch actuating means, comprising a bell, a hammer to strilre the bell, and gear upon that side ot the bell opposite the latch and having` a geared connection with the latch actuating means; and a manually controlled slide for shifting the position of the gear relative to that ol' the hammer and still maintain its operative connection therewith, whereby the hammer actuating means is disconnected from the latch acti'iating means and the alarm mechanism rendered inoperative.

2. In a device ol the character described, havinga case a latch means for actuating the latch; an alarm mechanism having an operative connection therewith and set in motion by the latch actuating means, comprising a bell, a hammer to strike the bell, and a gear upon that side oi the bell opposite the latch and having a geared connection with the latch actuating means; and a manually controlled slide t'or shifting the position of the gear relative to that of the hammer and still maintain its operative connection therewith, whereby the hammer actuating means is disconnected from the latch actuating means and desire to secure and the alarm mechanism rendered inoperative, said slide being exposed for operation through the same face of thc case as the latch, whereby the alarm mechanism may be rendered inoperative only when the loch is in such position as to expose said face.

yIn a device of the character described, having a case; a latch; means for actuating the latc i; a bell; a hammer to strike the bell; a sector movable about an axis coincident with that ol the hammer; a geared connection between the latch actuating means and the sector; a gear actuated by the sector and imparting movement to the hammer; and means for moving` the position of the gear relative to the sector, whereby the operative connection therebetween is separated and the hammer held against rotation by means ot said gear.

t. In a device of the character described, having a case; a latch; means lor actuating the latch; an alarm mechanism having an operative connection 'herewithand set in motion by the latch actuating means, comprising a bell, ahammer to strike the bell mounted so as tc rotate but held against axial movement; a geared connection between the latch actuating means and said hammer means for moving` one or" said gears, whereby ythe same is rendered inoperative during the movement ci the other of said'gears at the same time maintaining its contact with said hammer actuating means.

5. In a device of the character described, having a case; a latch; means for actuating the latch; an alarm mechanism having an operative connection therewith and set in motion by the latch actuating means, comprising a bell, a hammer to strike the bell, and a upon that side of the bell opposite the latch and having a geared connection with the latch actuating means; a manually controlled slide for shifting the position of the gear relative to that of the hammer and still maintain its operative connection therewith, whereby the hammer actuating means is disconnected :from the latch actuating means and the alarm mechanism rendered inoperative, said slide being movably connected with a roch arm; and means for holding said rock arm against accidental movement in some of its positions, the pressure oft which will not kbe suilicient to prevent movement` thereof.

(5. In a device of the character described, having a case; a latch; means for actuating the latch; an alarm mechanism having an operative connection therewith and set in inotion by the latch actuatingV means, comprising a. bell, a hammer to strike the bell, and a gear upon that side of the bell opposite the latchand having a geared connection with the latch actuating means; a manually controlled slide for shifting` the position of the gear relative to that of the hammer and still maintain its operative connection therewith, whereby the hammer actuating means is disconnected from the latch actuating means and the alarm mechanism rendered inoperative, said slide being movably connected with a roclr arm, said rock arm having angular faces thereon; a member associated with a fixed partand having contact With said angular faces; and spring means for holding said member against said angular faces under 'pressure sufcient to prevent the accidental movement of the rock arm but Without preventing manual movement thereof.

7. In a device of the character described, having a case; a latch; means for actuating the latch, comprising in part a sector; an alarm mec ianisin having an operative connection therewith and set in motion by the latch actuating means7 comprising a bell and a hammer to strike the bell; a gear sector having tivo geared portions, each with a different radius; the teeth of one portion being in mesh with the first mentioned sector and the teeth of the other portion being in mesh with a pinion associated With the gear; Wl ereby movement of the latch actuating means imparts rotation to the gear, which in turn controls the movement of the hammer.

8. ln a device of the character described; a case having a rib thereon; a face plate forming part thereof; a movably mounted latch, which in one of its positions projects outside of the face plate; means for actuating the latch; and means for holding the latch in alignment with the opening through the face plate, comprising a member associated therewith having an intermeshing engagement with said rib.

9. In a device of the character described; a case having a rib thereon; a face plate forming part thereof; a movably mounted latch7 which in one of its positions projects outside the face plate; means for actuating the latch, said latch being supported throughout its entire movement by said rib.

l0. ln a device of the character described; a case; a latch movably mounted therein; and abutment means for locking said latch in either or both its in or out positions; said means comprising a reciprocating member manually actuated in one direction from outside the loch case and spring actuated in the other direction; and means for holding the same against premature movement When in its in position.

l1. ln a device of the character described; a case; a latch movably mounted therein; and abutment means for locking said latch in either or both its in or out positions, said means comprising a reciprocating member manually actuated in one direction from outside the loclr case and spring actuated in the other direction; and means for holding the same against premature movement when in its in position, said means comprising in part a member associated therewith that travels through a .slot in a iixed part and engages a shoulder in one wall thereof.

ln testimony whereof, I have hereunto affixed my signature,

ANDRU G. PAPPADAKIS.

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