DE1429924A1 - Electric bread roaster - Google Patents

Description

The General Electric Company Limited, London, W.1.

Electric bread toaster

The present invention "relates to electric bread toasters,

An object of the present invention is a convenient arrangement for the insulated construction of electrically conductive Components of a bread toaster.

G-emäß the present invention consist in one electric bread toaster with end plates that are part of the outer casing of the bread toaster. -The end plates are molded from insulating material, and at least one of the end plates forms an insulating support part on which the electrically conductive components of the bread toaster are built.

A switch for controlling the excitation of an electrical Heating element, to cause the toasting of bread au, can have contacts in the form of resilient strips that are directly attached to a the end plates are attached.

In order for the invention to be easily understood, “ir'd a

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electrician ^: - ^! % we throw a "" bread rouge% er according to the result ^: - " ^r ■ 'as a" B ^ play ^ under -reference, to ^: the% ier "figure has a% eS- ^illi lying reward beschriebehy domestic ^devr;: '' ^{'i' ''} * ^ifi "" ^°: ■ "Fig Ί -a side view * dea toaster / where '' W ^{^;". "; ':} · agreed parts Cut to reveal Uta the inner "- 'mechanism of the bread toaster'," - "- '■ -

^: ■ '· Figure 2 is a view "of the inner Metallrähmens ^of::: bread toaster.' From below,"'^"r"'"^': - *"' - ^=; - '■ - <-' ■ - '"-

Fig. ' 5 is a plan view of the inside ^; the ^; "^ inen" ■ "end plate ^ of the bread toaster, and '""■-" · .-- ^: - - ■ - · "■ . ■■: ■■ - .:

"- ■ Pig.ν 4 'a partial ¹ top view of" the inside of the other' end plate of the 'bread toaster -'- is' ^.: '^{; V:} "'''':/" - - ^: '"'■' ■ .-. '

^As can be seen from the drawings, "the toaster has an outer housing which consists of two end plates 1 and 2 made of molded insulating material and a sheet metal housing 3 of inverted U-shape", the longitudinal edges of which are joined by projections 4 the end plates 1 and. 2 "The hood 3 has inwardly turned lower marginal edges through which screws (not shown) pass which secure the hood 3 to the end plates 1 and 2." Two seat braids 5 are provided at the top of the hood 3 through which the bread in the roasting chambers Ίβ and 17 of the bread toaster can be inserted (see ..Fig! 2).

^; A metal frame extends between the end plates 1 and 2, the top view of which is shown in FIG.

' ^; "-" ORJGINALiWSPECTED

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This frame 6 ″ has lugs 7 at its upper end, through which he with screws 8 on the projections 21 on the end plates 1 and 2 is attached and lugs 9 and 10 through which the frame 6 is held by screws 11 to the end plates 1 and 2, respectively will.

The frame 6 carries three heating elements 13, 14 and 15 '(see Pig. 2), which are arranged parallel to one another and thus define the two roasting chambers 16 and 17. The heating elements 13 a and 15 each consist of asbestos stencils 18 and 19, which have lugs 20 along their vertical edges, and metal bands 22 are wound onto the stencils, the lugs 20 fixing the bands 22 in the positions. Electrical continuity between the two ribbons 22 on templates 18 and 19 is established by connecting strip 23 attached to templates 18 and 19 at 24 and 25. The heating element 13 (as shown) and the heating element 15 carry the tapes 22 on one surface of the templates 18 and 19. The heating element 14 consists of templates 1? and 21, and the bands extend over both surfaces of these templates, since the heating element for both roasting chambers 16 and 17 is effective.

The two ends of the tapes 22 of each heating element are attached to solder lugs 26 and 27. In the case of the heating element 13, the soldering lugs 26 and 27 are fastened to the end plates 1 and 2 by angles 28 and 29, respectively, the fastening being done by screws 30. Screws 32 secure brackets 28 and 29 to end plates 1 and 2, respectively.

Similarly, solder lugs 26 and 27 are the heating element 14 at angles 33 and 34 (Figures 3 and 4) and the. Mitoses 26 and 27 of the heating element 15 at angles 35 and 36 attached. The angles 29 and 34 are electrically through in series Lines 37 and 38 are connected by a bimetallic timing mechanism which will be briefly described later. The angles 33 and 36 are electrically connected by lead 39, only a portion of which is shown. Therefore, the heating elements 13, 14 and 15 are electrically connected in series by the angles in the order 28, 29, 34, 33, 36 and 35. It should be noted that the clamp angles 28, 29 and 33 to 36 are simple metal strips are attached directly to the end plates 1 and 2, which in this way as an insulating support for these components serve »

In the RöstSiammem 16 and 17 extend horizontally. Bread carriers 40 and 44 (see particularly Figures 1 and 2), which consist of wire bent in a zigzag shape, the so formed

deten waves lie in a horizontal plane and on this Form a support for the lower edge of a slice of bread. The bread carriers 40 and 42 are in fact made from a single piece of wire which is generally U-shaped in the plane, where the base of the "U" is connected to the plate 43, which is the The shape of a flat channel has «, The free ends 44,45 of the" U " are arranged in vertical slots in the frame, the allow the bread carriers 40 and 42 to move vertically. The plate 43 forms one side of a parallelogram movement

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connection, which is indicated generally at 46 and which is rotatably mounted on the frame 6 at 47 and 48. Of the plate 43 gehtein lifter 49 from 'the _o to erptreckt through a vertical slot 51 in the end plate 2 in the outer end of the lifter 49, a knob 50 is attached, can be lifted by the carrier of the bread by hand and lowered.

A linkage 52 extends along three sides of the bread toaster outside the frame 6 and is rotatably mounted at its free ends at 53 and 54 in the frame 6. The linkage 52 runs under the jack 49, as from Pig. 1 can be seen _o The linkage 52 is biased upwards by tension springs 55, which are fastened at one end to the linkage 52 and at the other end to the frame 6 and in this way, if they are not (in a manner described below) are held in their lowered position, the bread carriers 42 and 40 in their upper positions (that is the position shown in Pig. 1) by engaging the lifter 49 will raise and hold.

The linkage 52 has an extension arm 56, whose lower end is U-shaped (see Pig. 4) and covered by a sleeve 57 of insulating material _e is the extension arm 56 includes arrangement in accordance with two sets 58 and 59 co-operating contacts which together form a two-pole switch form, which is in series with the heating elements 13, 14 and 15. Each of the contact sets 58 "and 59 comprises a fixed contact in the form of a metal strip 60 which is attached to the end plate 1 by screws 62, and a movable con-

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clock 63, which is secured by the screw 64 on the end plate 1, wherein the free ends of the two contact strips 63 can be actuated by the extension arm 56 according to the arrangement.

The contact strips 60 and 63 are biased away from one another by their own spring force. It will be appreciated, therefore, that when link 52 is in the raised position, contacts 60 and 63 are open to de-energize heating elements 13, 14 and 15, and when in the depressed position, through the pressure of the extension arm 56 are closed "to cause the excitation of the heating elements 13, 14, 15 _o

The cable for the toaster goes through the opening

65 inserted into the end plate 1. The network and center conductors

66 and 6? are connected to terminals 68 on fixed contact strips 60, and the earth conductor 69 is connected to the frame 6 by an L-shaped clamp 71. A conductor strip 70 connects the movable contact 63 of the contact set 58 to the terminal bracket 28, and a conductor strip 72 connects the contact 63 of the contact set 59 to ^the terminal bracket 35 .; It should again be noted that the end plate 1 is the insulating support for the construction of the components of the two-pole switch.

The linkage 52 also carries a latching part 73 »The latching part is, as can be seen in FIG. 3, U-shaped, the leg 74 of the "TJ" is shaped to fit under the Hooks 75 and 76 of the bimetallic timer latches around

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hold the linkage 52 in the lowered position (whereby the bread carrier rests on the rod 52 due to the force of gravity) «The leg 77 has an insulating one Part 78 so attached to it that when the linkage 52 in the lowered position and under the lower one Hook 75 is located, the part 78, the contact strip 79 of the Holding away contact strips 80 against their natural bias.

The two hooks 75 and 76 are biased towards each other by the spring 81 and have tails 82 and on opposite sides of the bimetallic strip. The bimetallic strip 84 carries the heating element 85 and is closed the contacts 79 and 80 via the lines 104 in parallel. When contacts 79 and 80 are open, heating element 85 is in Row connected to the main heating elements 13, 14 and 15 of the bread toaster via the clamp brackets 32 and 34. If the contacts 79 and 80 are closed, the heating element 85 is short-circuited

When the button 50 is depressed, the bread carriers 40 and 42 are moved to the toasting position, and the linkage is pressed down to cause the leg 74 of the latch member 73 on the linkage 52 below the lower Hook 75 latches and the insulating member 78 opens the contacts 80 and 80. The heating element 85 is therefore initially energized and causes the bimetal element 64 to flex over the knife edge 86 on which it rests. This may mean that the bimetal element 84 engages the tail 82 and

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the hook 75 moves so that the latch part is no longer under the hook., This will. a slight upward movement of the linkage under the. causes upper hook 76, which is under the action of TPeder 81 has moved during the movement of the hook 75 (after left in Pig. 3) ο This movement of the rod 52. is sufficient to that the contacts 79 and 80 close and the heating element .85 can short-circuit. The bimetal element 84 then cools down and returns to its initial position «, thereby moving it

If

the tail 83 upwards and possibly shifts in this way the hook 76 to a sufficient extent (to the right in Pig. 3) to release the linkage 52, which is then under the Train the springs 55 is raised to raise the bread carriers 40 and 42. This ends a roasting cycle.

Manufacturing tolerances can be compensated for by the dead movement of the bimetal element through the stop parts 88 and 89 makes adjustable. The exact setting of the working cycle of the bread toaster can be done by the slider 90 can be made with button 92. The glider, moved 90 located in the slot 93 in the rotatable lifter 94 which carries the stop part 88. The position of the slider 90 determines the position of the stop 88. The loosening of the linkage 51 by hand is done by button 95, which when pressed, a Rotational movement of the lifter 91 caused to engage either the pawl 75 or the pawl 76 and move them, depending on the position of the pawls 75 and

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76 at the moment of actuation

The timer "has a metal chassis 96 which is attached to the end plate 2 is fixed by screws 97 and 98. Contacts 79 and 80 are carried on chassis 96 and are electrically isolated from it by insulating parts 99 »100 and 102, with the contacts 79 and 80 between the insulating parts 99 »100 and 102 are layered. A screw 103 extends through parts 99 »100 and 102 to clamp them together. The lines 37 and 38 from the clamp brackets 32 and 34 and the lines 104 to the heating element 85 are through Terminals 105 and 106 connected to contacts 79 and 80.

Various modifications can be made to the construction described above. For example, the leathers 55 can be anchored in the frame at approximately the point of the arrow head on the reference line of the reference number 6 by bending metal eyelets from the side flanges of the frame at this point and anchoring the springs in them. Furthermore, the sleeve 57 can be replaced by a round part made of insulating material, which fits between the legs at the lower end of the extension arm 56 in the manner of an eye ring.

- patent claims -

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Claims (1)

39 'Patent claims: 1. Electric toaster with end plates that part of the outer housing of the bread toaster, characterized in that that the end plates are made of molded insulating material and at least one of the end plates is an insulating material Forms support part on which electrically conductive components of the bread toaster are built. 2. Electric bread toaster ^ according to claim 1, characterized in that an electrical heating element is attached with its ends to clamp brackets, which consist of metal strips which are attached directly to the end plates _o 3 «Electric bread toaster according to claim 1 or 2, characterized in that an electrical switch for Controlling the excitation of a cooperative heating element Has contacts in the form of resilient metal strips that directly are attached to one of the end plates o 4. Electric bread toaster according to claim 3 and. a mechanism for automatically raising a bread carrier from a toasting position when a toasting operation is complete, characterized in that the mechanism controls the relative position of the cooperating contacts so that when the bread carrier is raised the heating element is de-energized. . . 5 · Effective bread toaster according to claim 4 ,. through this characterized in that the mechanism includes an arm which U29924 attacks the cooperating contacts in accordance with the instructions in order to control their relative position « 6. Electric bread toaster according to claim 4 or 5, characterized in that a bimetallic timer mechanism to control the duration of a roasting process is built on one of the end plates. 7. Electric bread toaster according to one of the preceding claims and with a bread carrier, -der according to the order Bread slice carries, the plane of the bread slice is generally perpendicular and the lower edge of the bread slice rests on the bread carrier, which consists of a wave-shaped bent wire, the waves essentially in one direction Vertical transverse plane lie. 8. Electric bread toaster according to claim 7, and having a pair of toasting chambers, characterized in that the wire has two legs, one leg being the support part for a bread slice in one toasting chamber and the other leg is the support part for a bread slice in the other Roasting chamber forms. 809809/0373