US2034124A - Alarm clock - Google Patents

Description

March 17 193& R H H A 2,4934%,124

' ALARM CLOCK Filed Nov. 50, 1954 Patented Mar. 17, 1936 UNITED STATES g i Y 2,034,124

PATENT OFFICE ALARM CLOCK Application November 30, 1934, Serial No. 755,294

8 Claims.

This invention relates to improvements in alarm clocks.

One object of this invention is to provide an improved alarm-sounding construction formed of simple elements readily manufactured and readily assembled to produce an efficient, compact construction at minimum cost.

Another object of this invention is to provide an improved alarm-clock construction in which 1 the bell construction is so formed and located as to provide limit-means for one of the coil-springs of the clock-movement, without the need of employing additional parts.

With the above and other objects in View, this invention includes all improvements over the prior art which are disclosed in this application.

In the accompanying drawing, in which one way of carrying out the invention is shown for illustrative purposes:

Fig. 1 is a front elevation of an alarm-clock movement made in accordance with this invention;

Fig. 2 is a horizontal, fragmental, sectional view on line 2-2 of Fig. 1;

Fig. 3 is a perspective view of the rear movement-plate, and the bell and hammer-arm construction; and

Fig. 4 is a perspective view of the bell-mounting bracket.

In the description and claims, the various parts are identified by specific names for convenience, but they are intended to be as generic in their application as the prior art will permit.

The main portion of the movement construction, including the time-actuating mechanism and much of the alarm-actuating mechanism, are of ordinary construction.

Referring to the drawing, l and H are the front and rear movement-plates respectively, secured together by the four pillars l2. The bell I3 is secured by a rivet I4 or by spot-welding or otherwise to the arm l5 of a mounting or supporting-bracket 16, which latter is connected by rivets H or otherwise to the rear movement-plate II. The mainspring winding-arbor I8 is journaled in the movement-plates Ill and II and has secured thereto a main-wheel l9, and wound around the arbor I8 is a coiled mainspring 20 of usual type. The bell l3 has its concave face toward the main-wheel l9 and mainspring 20, and houses the portion of the latter two parts which extend beyond the edge of the movement-plates l0 and H. The parts are preferably so proportioned and arranged that when the mainspring 20 unwinds to its maximum, it engages against and is limited by the arm l5 of the supportingbracket Hi. The supporting-bracket l6 and bell l3 together constitute a construction which is hereinafter referred to by the term bell construction.

The alarm-spring winding-arbor 2| is journaled in the movement-plates I0 and H and has secured thereto a coil-spring 22 and alarm-wheel 23, which latter actuates the verge-wheel 24, the rotation of which verge wheel is controlled by a verge 25 having integral trunnions 26 pivoted in the movement-plates l0 and II. Firmly secured to or integral with the verge 25 is a hammer-arm 21, the upper end of which is bent to form a shutoif arm 28. The lower end of the hammer-arm 21 is given a 90 twist and is formed with a hammer 29, which latter may be integral, and is in a position to have an oscillating action back and forth to strike the edge 30 of the bell I3.

It will thus be seen that by the construction shown and described, the hammer mechanism can be made of maximum simplicity and can strike the bell without extending the hammer out beyond the movement-plates or pillars.

, It will also be observed that the arm 15 of the bell-supporting bracket [6 forms a limit or stop for the unwinding of the mainspring, without the need of employing any additional or special construction for this purpose.

The invention may be carried out in other specific ways than that herein set forth without departing from the spirit and essential characteristics of the invention, and the present embodiment is, therefore, to be considered in all respects as illustrative and not restrictive, and all changes coming within the meaning and equivalency range of the appended claims are intended to be embraced therein.

I claim:

1. An alarm-clock construction including: a movement including a pair of spaced-apart movement-plates; a winding-arbor journaled in the movement-plates; a coil-spring not housed in a barrel and surrounding and adapted to be wound by the winding-arbor and adapted to expand beyond an edge of said movement; a bellconstruction secured to said movement with the extreme edge surface of the bell adjacent said edge of the movement, the bell-construction being in a position to be engaged by the coil-spring to limit the unwinding of the coil-spring; and a hammer-arm pivoted to the movement and having a hammer adapted to move in a direction approximately perpendicular to the plane of, and

strike against the extreme edge surface of the bell.

2. An alarm-clock construction including: a movement including a pair of spaced-apart movement-plates; a bell-construction secured to said movement with the edge of the bell adjacent an edge of the movement; and a hammer-arm pivoted to the movement and having a hammer adapted to move in a direction approximately perpendicular to the plane of, and strike against the extreme edge surface of the bell.

3. An alarm-clock construction including: a movement including a pair of spaced-apart movement-plates; a winding-arbor journaled in the movement-plates; a coil-spring not housed in a barrel and surrounding and adapted to be wound by the winding-arbor and adapted to expand beyond an edge of said movement; and a bell-construction secured to said movement with the extreme edge surface of the bell adjacent said edge of the movement, the bell-construction being in a position to be engaged by the coil-spring to limit the unwinding of the coil-spring.

4. An alarm-clock construction including: a movement including a pair of spaced-apart movement-plates; a bell-construction secured to said movement with the extreme edge surface of the bell adjacent an edge of the movement; and a hammer-arm pivoted between the movementplates and having a hammer adapted to move in a direction approximately perpendicular to the plane of, and strike against the extreme edge sur-. face of the bell.

5. An alarm-clock construction including: a movement including a pair of spaced-apart movement-plates; a bell-construction secured to said movement with the extreme edge surface of the bell adjacent an edge of the movement; and a hammer-arm pivoted to the movement and having a shut-ofi arm extending transversely of the hammer-arm in one direction, and a hammer extending transversely of the hammer-arm in the opposite direction and adapted to move in a direction approximately perpendicular to the plane of, and strike against the extreme edge surface of the bell.

6. An alarm-clock construction including: a movement including a pair of spaced-apart movement-plates; a bell-construction secured to said movement with the extreme edge surface of the bell adjacent an edge of the movement; and a hammer-arm pivoted between the movementplates and having; a shut-off arm extending transversely of the hammer-arm in one direction, and a hammer extending transversely of the hammer-arm in the opposite direction and adapted to move in a direction approximately perpendicular to the plane of, and strike against the extreme edge surface of the bell.

7. An alarm-clock construction including: a movement including a pair of spaced-apart movement-plates; a winding-arbor journaled in the movement-plates; a coil-spring not housed in a barrel and between the movement-plates and surrounding and adapted to be wound by the winding-arbor, a portion of the coil-spring being adapted to expand in a direction out beyond an edge of the movement; and a concave bell-construction secured to said movement with the concave side of the bell toward and adapted to house said expandible portion of the coil-spring, said bell-construction being adapted to limit the expansion of said expandible portion of the coilspring.

8. An alarm-clock construction including: a movement including a pair of spaced-apart movement-plates; a winding-arbor journaled in the movement-plates; a coil-spring not housed in a barrel and between the movement-plates and surrounding and adapted to be Wound by the winding-arbor, a portion of the coil-spring being adapted to expand in a direction out beyond an edge of the movement; and a concave bell-construction, including a supporting-bracket, secured to said movement with the concave side of the bell toward and adapted to house said expandible portion of the coil-spring, the supporting-bracket being adapted to limit the expansion of said expandible portion of the coilspring.

RICHARD H. WHITEHEAD.

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