US2796560A

US2796560A - Bell transformer switching system

Info

Publication number: US2796560A
Application number: US530127A
Authority: US
Inventors: Burton J Klose
Original assignee: Individual
Current assignee: Individual
Priority date: 1955-08-23
Filing date: 1955-08-23
Publication date: 1957-06-18
Anticipated expiration: 1974-06-18

Description

Jime 18, 1957 B. J. KLOSE 2,796,560

BELL TRANSFORMER SWITCHING SYSTEM Filed Aug. 23, 1955 mmwmmv INVENTOR.

50mm! J KLosE.

United States Patent BELL TRANSFSRMER SWITCHING SYSTEM Burton J. Klose, Burlingame, Calif.

Application August 23, 1955, Serial No. 530,127

4 Claims. c1. 317-157.6)

My present invention relates to an improved doorbell system and more particularly to a compact assembly in which the entire system can be conveniently installed adjacent a doorway in the outer wall of a building.

The primary object of my invention is to provide a novel and unitary assembly of parts embodying a doorbell voltage providing transformer and a controlling switch or push button connected directly in the primary circuit of the transformer.

Another object is to provide a bell system in which the necessityfor maintaining the transformer in a permanently energized condition is avoided.

Another object of the invention is to provide a novel means for mounting a bell transformer and a bell circuit controlling switch or push button in a novel manner and within a single conventional conduit junction box.

A further object of the invention is to provide a doorbell system in which the doorbell operating switch is mounted in an exposed position at the exterior of the building and supported by a bracket carried by a conduit junction box within which said bracket also supports a low voltage bell operating transformer.

Other objects and advantages of the invention will be in part, evident to those skilled in the art in part pointing out whereinafter in connection with the accompanying drawings wherein there is shown by way of illustration and not of limitation, a preferred embodiment thereof.

In the drawing:

Figure l is a vertical elevation partially in section showing a preferred arrangement in accordance with the invention; and

Figure 2 is a plan view of the bracket of Figure 1, which serves as a mounting for both the control switch and a bell transformer.

It is generally the practice in doorbell systems to employ a transformer that is generally located in the basement or at some remote point within the building with its primary permanently connected to the power or house lighting circuit and then connecting the low voltage side of the transformer to the push button and the bell or chimes with ordinary bell wire. This arrangement often requires a considerable amount of the bell wire and because of its nature as a single conductor for each side of the line, great care must be exercised in threading the bell wire through the partitions. In these prior art systems the primary winding of the bell transformer is permanently connected in the power line and it thus constitutes a source of expense and constitutes a possible fire hazard.

To overcome the above disadvantages, I propose to employ a conventional bell transformer, but instead of maintaining the transformer in an energized condition I energize the transformer primary circuit through a push button type of power controlling switch which is employed in the same manner as is the bell ringing push button switch now in common use. This switch is connectecf'in series with the primary or high voltage circuit of the transformer 21,795,560 Patented June 18, 1957 ice 2 in such a way that the transformer is energized only when the push button is operated.

In addition to the above advantages, my invention also because of its compact nature, provides a bell wiring systern which can be economically and conveniently installed with a minimum of difficulty.

For a consideration of what I believe to be my invention, reference is now made to the accompanying drawing wherein the numeral 10 designates a stud of a building wall with a facing of plaster or sheathing 11 in which there is an opening 12. Mounted directly upon the stud 10 by means of a pair of lugs 13, there is a conduit junction box 14 having the usual knock-out blanks or discs through which external wiring connections may be extended. The junction box 14 is open along one vertical side and removably secured across its open side, there is a bracket 15 of modified form that serves as a support for a bell circuit transformer 16. On the outer side of this bracket 15 there is a push button switch 17, which is operated by a push button 18 that extends outward. As a finish and means of concealment, I also show a finish plate 19 which is secured to the bracket 15 and over the v the brackets now used with conduit junction boxes such as are now employed in the house wiring systems for the light switches. I

Q A feature of the present invention, as distinguished from prior art usage, is that I propose to mount the bell circuit transformer in the junction box immediately adjacent the bell circuit control switch and connect the primary of the transformer 16 directly to the power service circuit through the switch 17 by conductors 21.

From the secondary of the transformer 16 I show bell wire conductors 22 that extend to the doorbell or a chime (not shown), which in the majority of cases will be mounted on the inner side of the wall or partition closely adjacent the doorway where the doorbell operated push button 18 is located. In this way I eliminate the long and complicated bell wiring system such as is required when the bell transformer 16 is located in a more remote point, as for example in the basement or attic of a building.

As illustrated in Figure 2 of the drawing, the bracket 15 follows closely the form of those brackets used for mounting a wall switch in a junction box. The bracket 15 has the usual scored break-off portions 23 and breakoff tabs 24 at each end thereof and also elongated holes 25 which permit a proper positioning and/or centering of the bracket over the open side of the junction box 14. Like the standard brackets it also has properly spaced and threaded holes 26 to accommodate the screws 20 which serve to secure the finish plate 19 over the opening in the wall where the junction box 14 is mounted. This bracket 15, however, differs from the conventional form in that it also has a suitably dimensioned and drilled rectangular central portion 27 upon which the transformer 16, of standard dimensions, may be conveniently secured. This central portion 27 of the bracket 15 is also set-back to provide a space for the bell circuit controlling switch 17 mounted or shown upon the outer side thereof.

While I have, for the sake of clearness and in order to disclose the invention so that the same can be readily understood, described and illustrated a specific device and arrangement, I desire to have it understood that this invention is not limited to the particular means disclosed, but may be embodied in other ways that will suggest themselves to persons skilled in the art. It is believed that this invention is new and all such changes as come within the scope of the appended claims are to be considered as part of this invention.

Having thus described my invention, What I claim and desire to secure by Letters Patent is:

I. In a door bell system, the combination of a conduit junction box mounted in an open recess in a partition having an open side exposed in said recess opening, a bracket supported by and extending across the open side of said junction box and secured thereto at both ends, a transformer mounted upon the one side of said bracket and enclosed within said junction box, a transformer primary circuit controlling switch mounted upon the other side of said bracket, and a switch operating member extending outwardly from the open recess in said partition.

2. In a door bell system, the combination of a conduit junction box having an open side, said junction box having means for mounting upon the studding of a partition with its open side exposed in a recessed wall opening, a bracket having a back and front removably mounted upon said junction box and secured at both ends across the open side thereof, a transformer having primary and secondary windings mounted upon the back of said bracket and enclosed within said junction box, a circuit controlling switch mounted upon the front of said bracket, a wall outlet covering plate also carried by said bracket and concealing said junction box, and means extending through said wall outlet covering plate for operating said switch.

3. In a transformer bell system, the combination of a conduit junction box having an open side, said junction box having means for attaching same to the studding of a partition with its open side forming a recess in a wall opening, a bracket removably mounted upon said junction'box and secured at both ends across the open side thereof, a transformer having primary and secondary switch mounted upon said bracket and connected to control the primary winding connection of said transformer with a power source, means for operating said switch extending outwardly from the recess formed by said junction box in said wall opening, and a wall opening cover plate secured to and carried by said bracket having an opening through which said switch operating means extends for manual operation.

4. In a transformer door bell system, the combination of a conduit junction box having an open side and mounting lugs for attaching it to the studding of a partition and forming a recess at a wall opening, a bracket secured to the upper and lower walls of said junction box and extending vertically across its open side, a bell circuit transwindings mounted upon and behind said bracket and enformer having primary and secondary windings mounted upon the inner side of said bracket and enclosed within said junction box, a normally open push button switch connected to control the primary winding circuit connection of said transformer mounted upon the outer side of said bracket, and a cover plate through which the push button of said switch extends carried by said bracket in a junction box concealing position over said Wall opening.

References Cited in the file of this patent UNITED STATES PATENTS 1,839,348 Shaw Jan. 5, 1932 1,883,893 Flaherty Oct. 25, 1932 1,946,176 Mutscheller Feb. 6, 1934 2,191,637 \Vier Feb. 27, 1940 2,202,535 Pedatella May 28, 1940 2,304,923 Jackson Dec. 15, 1942 2,574,783 Hedding et al Nov. 13, 1951 OTHER REFERENCES Publication: Short Wave Craft, October 1934, p. 336.