United States Patent  Inventor Kenneth George Gray McGregor Bonhill, Alexandria, Scotland  Appl. No. 710,500  Filed Mar. 5, 1968  Patented Mar. 16, 1971  Assignee Burroughs Corporation Detroit, Mich.  Priority June 27, 1967  Great Britain  29649/67 [S4] CONVERTIBLE TYPE CARRIER 2 Claims, 6 Drawing Figs.
 US. Cl 197/36, 101/109  Int. Cl. B4lj 1/02  Field ofSearch 101/368; 197/36;101/109, 29, 84
[5 6] References Cited UNITED STATES PATENTS 2,508,593 5/1950 Braun l01/109X 2,746,385 5/1956 Mul1er.... 101/109 2,978,978 4/1961 Lang 101/109 2,995,082 8/1961 Sasaki 101/109 3,007,400 11/1961 Lego 101/109 1,040,042 10/1912 Smith 197/36 1,206,972 12/1916 Anderson.... 197/36 2,098,780 11/1937 Helmond..... 197/36 2,216,627 10/1940 Pitman 197/36 2,862,592 12/1958 Redmond 197/36 3,101,141 8/1963 Canny 197/36 FOREIGN PATENTS 9,671 4/1904 Great Britain 197/36 955,111 l/1950 France 197/36 Primary Examiner-Edgar S. Burr Attorneys- Kenneth L. Miller and Frank H. Cullen ABSTRACT: Various welLknown printing calculators are provided with type carriers having a plurality of rigidly at- PATENIEU mun 5 ran Z 6 w m v m w 4 3 m 4 .o
INVENTOR. KENNETH GEORGE GRAY M GREGOR.
BACKGROUND OF THE INVENTION Calculating machines of the printing variety generally provide type carriers representing the various denominational orders of a numerical printout. Each of these carriers comprises a plurality of character type representing the digit values that are encompassed in the measurement system for which the machine was designed, and frequently representing also the various item identifications that were required at the time the machine was acquired, in keeping with the nature of the work that was at that time contemplated.
As the scope or nature of a business changes, its calculating or recordation needs also occasionally change, in some instances requiring a change in the type fonts, digit values, or item identifications that were initially contemplated. Such changes have heretofore been expensive to accomplish since they generally require the services of a skilled repairman, if not the attention of a factory trained representative of the manufacturer. This expense is commonly further aggravated by long periods of delay during which the machine is rendered inoperative while obsolete type carriers are removed and new carriers installed.
Characteristic of such changes in requirements are those necessitated by the forthcoming decimalization program in Great Britain. Whereasprinting calculators in Great Britain have been required to print from 1 to 11 pence in the lowest denominational order in the sterling system of notation, the new decimalized currency will require recordation of a halfpenny only (otherwise known as new halfpence) in the lowest order. To accommodate this along with other related requirements, business machine manufactures have been engaged in development programs designed to incorporate in a single calculating or accounting machine mechanisms which are capable of accumulating and printing amounts measured in either old sterling or new decimalized currency. The convertibility of this new equipment, as between the two currencies, with a minimal involvement of skilled'r'epresentatives, is naturally receiving emphasis.
One embodiment of the present invention accordingly provides for the ready conversion of the pence type carrier by the operator, so thatcharacter type ranging in value from to l 1 can be replaced with a halfpenny (or new halfpence) character type. As an example of how this embodiment of the present invention may be utilized in the forthcoming decimalization program in Great Britain, a head member comprising character type ranging from O to 11 may be utilized in conjunction with a shank member to which the head member is slideably attached, for posting in the sterling system of notation before the new decimalized currency is introduced, the head member then being slideably removed from the shank member by the operator when the need for posting in the decimal system of notation first arises. A substitute head member comprising only a halfpenny (new halfpence) character type in the sixth position may then be installed bythe operator preparatory to posting in new decimal currency. By means of this embodiment therefore, in conjunction with a l2-pitch one point accumulator wheel in the lowest accumulating order, and in conjunction also with suitable keyboard blocking means effective in decimal mode to permit the depression of the six key in the pence column only, convertibility as between sterling and decimal notation, relative to the accumulation and printing of either pence amounts or a halfpenny, could be realized without the specialized attention of a skilled representative.
SUMMARY OF THE INVENTION The present invention consists of a two-part type carrier which is usable as a conventional type carrier and adaptable to the changing requirements of recordation. This two-part type carrier comprises an elongated member which cooperates with the printing mechanism of the machine, and which serves as a carrier for a replaceable head member, the latter member comprising the character type that are required in the conduct of a business. As the printing requirements of the business change, the replaceable head member may be removed conveniently by the operator and a new head member comprising character type corresponding to the new requirements substituted therefor. 1
BRIEF DESCRIPTION OF THE DRAWINGS The various aspects of the present invention will be more clearly understood from the following description when read in conjunction with the accompanying drawings in which:
FIG. 1 is a side view of an assembled two-part typecarrier;
FIG. 2 is a side view of a shank member of the two-part type carrier;
FIG. 2A is a side view of a head member of the two-part type carrier;
FIG. 3 is a front view of a head member comprising character type ranging from 0 to 1 l;
FIG. 4 is a front view of a head member comprising a halfpenny (new halfpence) character type intermediate its length;
DETAILED DESCRIPTION OF THE INVENTION A two-part type carrier comprises a shank member 21 and a head member 23. In one embodiment of the invention, the upper half 21' of the shank member 21 has a trapezoidal cross section and the head member 23 comprises a longitudinally disposed trapezoidal groove 23' which is slideably engageable with the trapezoidal portion 21' of the shank member 21. The head member 23 also comprises a handling projection 25, an aperture 27, and a plurality of character type 45 rigidly disposed along an impacting side thereof. The head member 23, comprising rigidly affixed character type 45, is effective to print digit values on any suitable record from by means of a forced impact of the head member 23 against an interposed ribbon and a form-bearing platen, the indexed one of the character type having been raised into alignment with the platen by conventional indexing means and machine cycling.
- The'shank'member 21' also comprises a biased plunger member 33 secured to theshank member 21' by a screw 32, at a point proximate its upper extremity, as best shown in FIG. 5.
31, a shoulder portion 37, and a stud portion-35 which is normally urged into engage, relationship with the aperture 27 .of
- an assembled head member 23 through a shank member aperture 34.
To accommodate the above-described currency conversion program in Great Britain, as an example, a head member 41 comprises character type ranging in value from 0 to ll which may be used in the lowest denominational order of the printing section ofa printing calculator when the sterling system of notation is being employed, and a head member 43 comprises a halfpenny (new halfpence) character located in a position corresponding to the six position of the head member 41, and may be substituted for the head member 41 when the decimal system of notation is adopted. Selective use of either head member 41 or 43, in conjunction witha l2-pitch one point accumulator wheel and suitable keyboard blocking means permitting depression of the six key only in the pence column of the keyboard when in decimal mode, will serve to. provide ready convertibility as between the sterling and decimal systems of notation relative to the accumulation and printing of either pence or halfpennies (new halfpence).
Other removable head members similar to members 23, 41 and 43 could comprise any desired combination of character type in order to render a printing calculator readily adaptable to the changing requirements.
Other means for slideably assembling the head member 23 to the shank member 21, aside from the use of a trapezoidal shank and groove, could be employed by one skilled in the art within the scope and intent of the present invention.
To replace a given head member 23 with a member comprising different character type, the operator may simply force the extension 31 of the biased plunger member 33 away from the shank member 21 and slide the head member 23 upwardly and out of engagement with the shank member by means of the projection 25. The head member to be substituted therefor may then be slideably lowered onto the shank member 21, until the biased plunger member 33 engages the aperture 27 of the replacement head member 23.
I claim 1. A two-part type carrier for use in a printing mechanism, said type carrier including an elongated shank member having a trapezoidal formed portion and including also a selected type-carrying head member having a trapezoidal groove formed on one side thereof, said groove of said selected head member and said formed portion of said shank member being slidably coope'rable to provide coupling and decoupling means therebetween whereby said type carrier is rendered readily adaptable to various and varying printing needs, said two-part type carrier being characterized by:
a. a projection disposed on an edge of said head member opposite the edge carrying the type characters thereof. b. an aperture disposed in said head member at a point proximate one extremity of said trapezoidal groove, c. an aperture disposed in said shank member in corresponding relationship with said aperture of said selected head member such that said apertures bear an aligned and axially disposed relationship when said selected head member and said shank member are slidably and fully coupled, and
d. a resilient plunger member connected to said shank member, said plunger member having an upright extension, a shoulder portion, and a stud portion, the resiliency of said plunger member being normally effective to hold said shoulder portion in contacting relationship with the adjacent side surface of said shank member and to hold said stud portionfully engaged with said aperture of said shank member, said stud portion extending through said shank member aperture to retainably engage said selected head member aperture when said head member and said shank member are fully coupled.
2. The two-part type carrier defined in claim 1 wherein the decoupling of said selected head member from said shank member is effectuated by the manual withdrawal of said stud portion of said resilient plunger member from said head member aperture and slidably removing said selected head member from said shank member by means of said head member projection, said manual withdrawal of said stud por tion being accomplished by the sidewise activation of said upright extension of said plunger member.